Ubuntu Manpage: trn - threaded read news program

NAME

       trn - threaded read news program

SYNOPSIS

       trn [options] [newsgroups]

DESCRIPTION

Trn is a threaded version of rn, which is a replacement for the readnews(1) program. Being "threaded"
means that the articles are interconnected in reply order. Each discussion thread is a tree of articles
where all the reply (child) articles branch off from their respective originating (parent) articles. A
representation of this tree (or a portion of it) is displayed in the article header as you are reading
news. This gives you a better feel for how all the articles are related, and even lets you see at a
glance when an article has replies -- a good thing to check before posting. In addition, trn has a
thread selector that allows you to quickly browse through a list of subjects and choose the ones you find
interesting. This thread selector sorts articles according to various criteria and can be switched into
various display modes that allows you to pick all the subjects separately (threads can have multiple
subjects) or even pick individual articles. Any items you don't select can be saved for reading later or
marked as read with a single keystroke.

If you are already familiar with trn you may just want to read the WHAT'S NEW section. People upgrading
from rn will probably want to pay attention to the sections on The Selector, The Tree Display, and the
aforementioned WHAT'S NEW. If you're impatient, just dive in and get started. All the regular commands
will be familiar to an rn or trn user, and the on-line help will give you a quick run-down of what
commands are available (just type 'h' from any prompt). I'd also suggest using the command:

trn -x -X

to make sure some of the best features are turned on.

Starting Trn

If no newsgroups are specified, all the newsgroups which have unread news will be presented to the user
in the order in which they occur in the .newsrc file. At the prompt for each group you can choose to
read it, skip it, move it, etc. If a list of newsgroups is provided on the command line, trn will start
up in "add" mode, using the list as a set of patterns to add new newsgroups and restrict which newsgroups
are displayed (see also the discussion of the 'a' command on the newsgroup-selection level).

Trn operates on four levels: the newsgroup-selection level, the thread selector, the article-reading
level, and the paging level. Each level has its own set of commands, and its own help menu. At the
paging level (the bottom level) trn behaves much like the more(1) program. At the article-reading level
articles are presented to you in the order of their replies, with the subjects being ordered by the date
of the oldest unread article (though there are commands for changing the default display order). In the
thread selector you are presented with the subjects and (usually) authors associated with each discussion
thread, and given a chance to choose which ones you wish to read now, save for later, or manipulate in
some way. At the newsgroup-selection level (the top level), you may specify which newsgroup you want
next, or read them in the default order, which is the order that the newsgroups occur in your .newsrc
file. (You will therefore want to rearrange your .newsrc file to put the most interesting newsgroups
first. This can be done with the 'm' command on the Newsgroup Selection level. WARNING: invoking
readnews/vnews (the old user interface) in any way (including as a news checker in your login sequence!)
will cause your .newsrc to be disarranged again.)

On any level, at ANY prompt, help is available by typing an 'h'. This gives you a summary of available
commands and what they do. Remember this command, you'll need it.

Typing space to any question means to do the normal thing. You will know what that is because every
prompt has a list of several plausible commands enclosed in square brackets. The first command in the
list is the one which will be done if you type a space. (All input is done in cbreak mode, so carriage
returns should not be typed to terminate anything except certain multi-character commands. Those
commands will be obvious in the discussion below because they take an argument.)

Upon startup, trn will do several things:

1. It will look for your .newsrc file, which is your list of subscribed-to newsgroups. If trn doesn't
find a .newsrc, it will create one. If it does find one, it will back it up under the name
".oldnewsrc".

2. It will input your .newsrc file, listing out the first several newsgroups with unread news.

3. It will perform certain consistency checks on your .newsrc. If your .newsrc is out of date in any of
several ways, trn will warn you and patch it up for you, but you may have to wait a little longer for
it to start up.

4. Trn will next check to see if any new newsgroups have been created, and give you the opportunity to
add them to your .newsrc.

5. Trn goes into the top prompt level -- the newsgroup-selection level.

Newsgroup Selection Level

In this section the words "next" and "previous" refer to the ordering of the newsgroups in your .newsrc
file. On the newsgroup-selection level, the prompt looks like this:

====== 17 unread articles in talk.blurfl -- read now? [ynq]

unless the group is set for unthreaded reading, in which case the first six characters are "******". The
following commands may be given at this level:

+ Enter this newsgroup through the selector.

y Begin reading this newsgroup now.

SP Enter the newsgroup by executing the default command listed in []'s.

.command
Do this newsgroup now, but execute command before displaying anything. The command will be
interpreted as if typed on the article selection level.

= Start this newsgroup, but list subjects before displaying articles.

U Enter this newsgroup through the unkill-articles prompt.

t Toggle the newsgroup between threaded and unthreaded reading. The default is threaded, and the
current setting is stored in your .newsrc.

n Go to the next newsgroup with unread news.

N Go to the next newsgroup.

p Go to the previous newsgroup with unread news. If there is none, stay at the current newsgroup.

P Go to the previous newsgroup.

- Go to the previously displayed newsgroup (regardless of whether it is before or after the current
one in the list).

1 Go to the first newsgroup.

^ Go to the first newsgroup with unread news.

$ Go to the end of the newsgroups list.

g newsgroup
Go to newsgroup, which can be the group's name or a zero-relative number of the groups in your
.newsrc (see the 'L' command to list your .newsrc). If it isn't currently subscribed to, you
will be asked if you want to subscribe.

/pattern
Scan forward for a newsgroup matching pattern. Patterns do globbing like filenames, i.e., use *
to match any sequence of characters, and [] to specify a list of characters to match. Use . to
match a single character. Unlike normal filename globbing, newsgroup-searching is not anchored
to the front and back of the filename, i.e. "/ski" will find rec.skiing. You may use ^ or $ to
anchor the front or back of the search: "/^test$" will find newsgroup test and nothing else If
you want to include newsgroups with 0 unread articles, append /r. If the newsgroup is not found
between the current newsgroup and the last newsgroup, the search will wrap around to the
beginning.

?pattern
Same as /, but search backwards.

u Unsubscribe from the current newsgroup.

l string
List newsgroups not subscribed to which contain the string specified.

L Lists the current state of the .newsrc, along with status information.

Status Meaning
<number> Count of unread articles in newsgroup.
READ No unread articles in newsgroup.
UNSUB Unsubscribed newsgroup.
BOGUS Bogus newsgroup.
JUNK Ignored line in .newsrc
(e.g. readnews "options" line).

(A bogus newsgroup is one that is not in the list of active newsgroups in the active file, which
on most systems is /usr/lib/news/active unless you use NNTP.)

m {name}
Move the named newsgroup somewhere else in the .newsrc. If no name is given, the current
newsgroup is moved. There are a number of ways to specify where you want the newsgroup -- type h
for help when it asks where you want to put it.

c Catch up -- mark all unread articles in this newsgroup as read.

A Abandon the changes made to the current newsgroup since trn was started. Useful when you
accidentally mark a group as read.

o {pattern}

O {pattern}
Only display those newsgroups whose name matches pattern. Patterns are the same as for the '/'
command. Multiple patterns may be separated by spaces, just as on the command line. The
restriction will remain in effect either until there are no articles left in the restricted set
of newsgroups, or another restriction command is given. Since pattern is optional, 'o' by itself
will remove the restriction. Using 'O' will omit empty groups from the cycle.

a pattern
Add unsubscribed newsgroups matching pattern. If any matching newsgroups are found, you will be
asked for each one whether you would like to add it. If you want to add all the newsgroups, you
can type 'Y' and they will be added the the end of the .newsrc file. If you don't want to
subscribe, all the remaining groups can be ignored by typing 'N'. After any new newsgroups have
been added, the 'a' command also restricts the current set of newsgroups just like the 'O'
command does.

& Print out the current status of command-line switches and any newsgroup restrictions.

&switch {switch}
Set additional command-line switches.

&& Print out the current macro definitions.

&&keys commands
Define additional macros.

!command
Escape to a subshell. One exclamation mark (!) leaves you in your own news directory. A double
exclamation mark (!!) leaves you in the spool directory for news, which is usually
/usr/spool/news unless you're using NNTP to read news. The environment variable SHELL will be
used if defined. If command is null, an interactive shell is started.

v Print the current version number and information on where to send bug reports.

q Quit.

x Quit, restoring .newsrc to its state at startup of trn. The .newsrc you would have had if you
had exited with 'q' will be called .newnewsrc, in case you didn't really want to type 'x'.

^K Edit the global list of memorized commands (in the global KILL file) that you wish to be
performed in every newsgroup as it is started up (that is, when it is selected at the newsgroup-
selection level). This file contains commands (one per line) such as /subject/:j or /author/f:+
to kill or select articles based on the indicated search criteria. There is also a local list of
commands for each newsgroup that can contain kill/selection commands tailored for each specific
group. Because of the overhead involved in searching for articles to kill, it is better if
possible to use a local list rather than the global one. Local memorized commands are usually
maintained by using the 'A' or 'T' commands from the article/pager level or in the selector.
There is also a K search modifier that appends any search command you desire to add. It is also
possible to manually edit the file with the '^K' command from anywhere inside a newsgroup. If
either of the environment variables VISUAL or EDITOR is set, the specified editor will be
invoked; otherwise a default editor is invoked on the KILL file.

The Selector

Most people who don't have all day to read news will want to enter a newsgroup by way of the selector.
This is accomplished by using the '+' command at the newsgroup-selection or article/pager levels. In
fact, this may be the default command for entering a newsgroup, depending on how your version of trn was
configured and your use of the -X option.

The selector displays a list of articles by their subjects and (usually) authors. The articles are
grouped into threads by default (which may list multiple subjects per selectable item if the subject has
changed during the discussion) and ordered by the date of their oldest unread article. Thread or subject
groups are also shown with a count of the number of articles in each group. Each selectable item is
preceded by a letter or number that can be typed to toggle its selection. Items that are selected are
flagged with a '+' after their letter. Groups that have only some of their articles selected are flagged
with a '*'. You can change the selector's mode (to pick each subject separately or pick individual
articles), order the list by a variety of sort criteria, and switch the author display between its long,
medium and short styles using the commands detailed below.

The following commands are available in the selector:

a-z,0-9,A-Z
Select/deselect the indicated item by its letter or number. There are quite a few letters
omitted from the alpha characters to be typed as commands -- see below. Also, the variable
SELECTCHARS is available to customize which characters you want to be used as selection letters,
overriding their command function.

SP Perform the default command. This is usually > for most pages, and Z on the last page (although
D and X are also quite popular).

CR Begin reading. If no articles are selected, the current item is selected (unless you've marked
it as killed).

Z,TAB Begin reading. If no articles are selected, read all unread articles.

'.' Toggle the current item's selection (the one under the cursor).

* Same as '.' except that it affects all articles with the same subject (useful in the article
selector).

# Make an overriding selection that reads the current item only, temporarily ignoring all other
selections.

k, ',' Mark the current item as killed.

m, \ Unmark the current item.

- Set a range, as in a - k. Repeats the last marking action: selection, deselection, killing, or
unmarking.

@ Toggle all visible selections.

M Mark the current item's article(s) to return on newsgroup exit and kill the item.

Y Yank back and select the marked-to-return articles, clearing their to-return status.

E Exclude all unselected items from the selection list (narrow the display). Press it again to
pick from all available items.

n, ] Move down to the next item (try the down-arrow keypad key also).

p, [ Move up to the previous item (try the up-arrow keypad key also).

< Go to previous page (try the left-arrow keypad key also).

> Go to next page (try the right-arrow keypad key also).

^ Go to the first page.

$ Go to the last page.

S Set the items the selector displays: threads, subjects or articles. If the group is unthreaded
setting this to threads will thread the group.

= Switch between the article selector and the subject/thread selector.

O Pick the order for the items: date, subject, author, item count (for thread/subject groups), and
a subject-date grouping of individual articles. Typing the selection in lower-case will sort the
articles in the default direction, while using upper-case will reverse the sort. There is a
separate default sort order for the subject/thread selector and the article selector. See the -O
option to set your favorite selector mode and sort order as the default.

R Reverse the current sort order.

L Switch the selector's display between the long, medium and short display styles. See the -x
option to set your favorite style as the default.

U Switch between selecting unread/read articles.

X Mark all unselected articles as read and start reading.

D Mark unselected articles on the current page as read and begin reading if articles are selected,
otherwise go to the next page.

J Mark all selected articles as read (useful after performing some action on them with the ':'
command).

c Catch up -- marks ALL articles as read without affecting their cross-posted counterparts.

A Add a subject-search command to the memorized list (a.k.a. a KILL file) for this group. You are
prompted to choose selection (+), junking (j), selection including all replies (.) or junking
including all replies (,). If the thread has more than one subject the first subject is the one
chosen for the memorized command.

T Add a thread-oriented command to the memorized list for this group. You are prompted to choose
selecting the thread (+), junking the thread (j), or clearing the auto-selection/junking for the
thread (c). (Note: there are three other options ('.', ',', and 'C') on the article-reading
level -- look there for an explanation of their use.)

^K Edit the local list of memorized commands (a.k.a. a KILL file) for this newsgroup. A detailed
description of memorized commands is found in the Article Selection section.

:command
Apply a command to all the selected threads or their selected articles. You can also use ":E" to
end a binary extraction or ":p" to post a new article. Use "::command" to apply it to all non-
selected threads/articles.

Applicable commands include '+'/'-' (select/deselect an article), "++"/"--" (select/deselect a
thread), "T+" (auto-select the entire thread), "TJ" (auto-junk the entire thread), 't' (display
article tree), "s dest" (save article to a destination), "e dir" (extract to directory), 'E' (end
partial uudecode), as well as: S, ⎪, w, W, m, M, j, = and ','.

:.command
Apply a command to the current thread or the selected articles in the current thread. Use
"::.command" to apply a command to the unselected articles in the current thread.

/pattern
Scan all articles for a subject containing pattern and select it.

/pattern/modifiers:command{:command}
Apply the commands listed to articles matching the search command (possibly with h, a, b, r, or K
modifiers). The default action, if no command is specified, is to select the article's item in
the selector (e.g. the entire thread ("++") in the thread selector). See the section on Regular
Expressions and the description of pattern searching in the Article Selection section.

One example: to scan all the unread articles looking for "topic" anywhere in the article and then
select its group and save the articles to the files topic.1, topic.2, etc. use "/topic/a:++:s
topic.%#".

N Go to the next newsgroup with unread news.

P Go to the previous newsgroup with unread news.

& Display or set the current status of command-line switches.

&& Display or set the current macro definitions.

!command
Escape to a subshell.

q Quit this group.

ESC,+ Quit the selector to the article level. Note: ESC won't work if trn has mapped your arrow keys
with default macros and the first character that your arrow keys send is an ESC.

Q Quit the current newsgroup and return to the newsgroup-selection prompt for this group.

Article-Reading Level

On the article-reading level, trn displays unread articles in thread sequence (reading each article and
its replies before going on to another topic) unless threads are disabled for a particular group, in
which case the default order is the order they arrived at your site (numeric sequence). In either case
if you use the subject-search command (^N) you will switch to reading the articles in date order within
each matching subject. (Making selections in the subject selector or using the -S switch will
automatically turn subject search mode on in an unthreaded group.)

On the article-reading level you are not asked whether you want to read an article before the article is
displayed; rather, trn simply displays the first page (or portion of a page, at low baud rates) of an
article and asks if you want to continue. The normal article-reading prompt comes at the END of an
article (although article-reading commands can also be given from within the middle of an article in
addition to the pager level commands). The prompt at the end of an article looks like this:

End of article 248 (of 257) -- what next? [npq]

The following are the options at this point:

n,SP Scan forward for next unread article. (Note: the 'n' (next) command when typed at the end of an
article does not mark the article as read, since an article is automatically marked as read after
the last line of it is printed. It is therefore possible to type a sequence such as 'mn' and
leave the article marked as unread. The fact that an article is marked as read by typing n, N,
^N, F, R, e, s, S, ⎪, w, or W within the MIDDLE of the article is in fact a special case.)

N Go to the next article.

^N Find the next article with the same subject in date order. This also makes subject search mode
(^N) the default command at the end of an article.

p Scan backward for previous unread article. If there is none, stay at the current article.

P Go to the previous article.

- Go to the previously displayed article (regardless of whether that article is before or after
this article in the normal sequence).

^P Find the previous article with the same subject in date order. Makes subject search mode (^N)
the default.

_N Go to the next article in numeric sequence.

_P Go to the previous article in numeric sequence.

<, > Browse the previous/next selected thread/subject. If no selections have been made, all the
threads that had unread news when you entered the newsgroup (or last left the selector) are
treated as selected. Entering an empty newsgroup makes all the already-read threads available
for browsing.

[, ] Proceed to the left/right in the article tree. Visits already-read articles as well as empty
nodes. Try using the left-/right-arrow keys also.

{, } Go to the root/leaf of the article tree, even if the node is already read or empty. Proceeds to
the very first/last node if you're already at a root/leaf in a multi-root thread.

(, ) Go to the previous/next sibling in the thread, including "cousin" siblings. Try using the
up-/down-arrow keys also.

t Display the entire article tree and all its associated subjects. If the group is not currently
threaded, it will become threaded to process this command.

^R Restart the current article.

v Restart the current article verbosely, displaying the entire header.

^L Refresh the screen.

^X Restart the current article, and decrypt as a rot13 message.

X Refresh the screen, and decrypt as a rot13 message.

b Back up one page.

^E Display the last page of the article.

q Quit this newsgroup and go back to the newsgroup-selection level.

^ Go to the first unread article.

$ Go to the last article (actually, one past the last article).

number Go to the numbered article.

_C Switch to next available charset conversion.

range{,range}:command{:command}
Apply a set of commands to a set of articles. A range consists of either <article number> or
<article number>-<article number>. A dot '.' represents the current article, and a dollar sign
'$' represents the last article.

Applicable commands include 'm' (mark as unread), 'M' (mark as read-until-exit), 'j' (mark as
read), "s dest" (save to a destination), "e dir" (extract to directory), "!command" (shell
escape), "=" (print the subject), '+'/'-' (select/deselect the article), 'T+' (auto-select the
entire thread), 'TJ' (auto-junk the entire thread), "++"/"--" (select/deselect the associated
thread), 'C' (cancel), as well as S, ⎪, w, W, and t.

:command
Apply a command to all the selected threads or their selected articles. Use "::command" to apply
it to all non-selected threads/articles. For applicable commands, see the discussion above for
the range command.

:.command
Apply a command to the current thread or the selected articles in the current thread. Use
"::.command" to apply a command to the unselected articles in the current thread.

j Junk the current article (i.e. mark it as read). If this command is used from within an article,
you are left at the end of the article, unlike 'n', which looks for the next article.

m Mark the current article as still unread. (If you don't want to see this article for a while
you're probably better off using M instead of m, otherwise this article might get picked again as
the first available article sooner than you'd like.)

M Mark the current article to return on newsgroup exit. Until then, the current article will be
marked as read. This is useful for returning to an article in another session.

Y Yank back the marked-to-return articles, clearing their to-return status. If you are reading
selected articles, the yanked articles come back selected.

/pattern
Scan forward for article containing pattern in the subject. See the Regular Expressions section.
Together with the escape substitution facility described later, it becomes easy to search for
various attributes of the current article, such as subject, article ID, author name, etc. The
previous pattern can be recalled with ESC. If pattern is omitted, the previous pattern is
assumed.

/pattern/f
Scan forward for article containing pattern in the from line. If you are using thread files the
article data you are matching against MAY contain only the real name of the user. If you want to
always match the full from line, see the following header-matching option that will read in the
full from-line data if it is not already available.

/pattern/Hheader
Scan forward for article containing pattern in the indicated header. Because we scan the entire
string up to the end of the modifiers, this modifier must be the last one. For example,
"/jsmoe@somesite.com/rHfrom:m+" will mark all articles from "jsmoe@somesite.com" as unread and
select them. Note that if the header line isn't one that trn recognizes in its header parser,
you'll have to use the following full-header matching.

/pattern/h
Scan forward for an article containing pattern in the header.

/pattern/a
Scan forward for an article containing pattern anywhere in the article.

/pattern/b
Scan forward for an article containing pattern in the body of the article, but not the signature.
(The signature must be properly delimited to be ignored, however.)

/pattern/B
Scan forward for an article containing pattern anywhere in the body of the article.

/pattern/r
Scan read articles also.

/pattern/c
Make search case sensitive. Ordinarily upper- and lower-case are considered the same.

/pattern/t
Force the search to start at the top of the group (useful while reading the group, since the
default is to start at the current article).

/pattern/I
Force the search to ignore the THRU line when executed as a memorized command. If the command
portion is a selection command (i.e. it starts with a '+' or a '.') this is the default behavior.

/pattern/N
Force the search to NOT ignore the THRU line when executed as a memorized command (useful on
selection commands -- see also -k).

/pattern/modifiers:command{:command}
Apply the commands listed to articles matching the search command (possibly with h, a, b, or r
modifiers). Applicable commands include 'm' (mark as UNread), 'M' (mark as read-until-exit), 'j'
(junk -- mark as read in all groups), 'x' (mark as read in this group), "s dest" (save to a
dest), "e dir" (extract to dir), "!command" (shell escape), "=" (print the subject), '+' (select
the article), '-' deselect the article, 'T+' (auto-select the entire thread), 'TJ' (auto-junk the
entire thread), "++" (select the associated thread), "--" deselect the associated thread), and
'C' (cancel). If the first command is 'm' or 'M', modifier r is assumed. A K may be included in
the modifiers (not the commands) to cause the entire command (sans K) to be saved to the local
KILL file, where it will be applied to every article that shows up in the newsgroup.

For example, to save all articles in a given newsgroup to the line printer and mark them read,
use "/^/⎪lpr:j". If you type "/^/K⎪lpr:j", this will happen every time you enter the newsgroup.

?pattern
Scan backward for article containing pattern in the subject. May be modified as the forward
search is: ?pattern?modifiers[:commands]. It is likely that you will want an r modifier when
scanning backward.

k Mark as read all articles with the same subject as the current article. (Note: there is no
single character command to temporarily mark as read (M command) articles matching the current
subject. That can be done with "/<ESC>s/M", however.)

Mark the current article and all its replies as read.

J Junk all the articles in the current thread, even if it contains multiple subjects.

A Add a subject-search command to the memorized list for this group (in the KILL file). You are
prompted to choose selection (+), junking (j), selection including all replies (.) or junking
including all replies (,).

K This is a synonym for the command "Aj" which adds a command to junk the current subject to the
memorized commands for the group. See also the K modifier on searches above.

T Add a thread-oriented command to the memorized list for this group. You are prompted to choose
selection of entire thread (+), junking of entire thread (j), selection of an article and its
replies (.), junking of an article and its replies (,), clearing the auto-selection/junking for
this thread (c), or clearing the auto-selection/junking for an article and its replies (C).

^K Edit the local list of memorized commands (a.k.a. a KILL file) for this newsgroup. Each line of
the KILL file is either a subject-affecting command of the form /pattern/x or a thread-affecting
command of the form <message-id> Tx. The first line in the KILL file has the form "THRU
<number>", which tells trn the maximum article number that the KILL file has been applied to.
The THRU value is usually only used to keep header or article searches from happening multiple
times. Subject and from-line searches are quite fast if the group has cached data around (e.g. a
.thread or .overview file). If it doesn't, the THRU line is used to set a lower boundary on the
search to keep the startup time as short as possible. If trn skipped some selections (or you're
not sure), wait for the group to finish being cached (e.g. visiting the selector forces the
caching of all unread articles), quit the group, and re-enter.

To see only newgroup articles in the control newsgroup, for instance, you might include the line

/newgroup/:+

which selects all subjects containing "newgroup". You can add lines automatically via the A and
T commands as well as the K search modifier, but editing is the only way to remove subject
commands (thread commands die automatically as the thread dies). If either of the environment
variables VISUAL or EDITOR is set, the specified editor will be invoked; otherwise a default
editor (normally vi) is invoked on the KILL file.

The KILL file may also contain switch-setting lines beginning with '&' (see the section on
"Options") and special commands beginning with '*'. There are two such commands at the moment:
"*j" (junk all articles from THRU to the end of the group) and "*X" (junk all unselected articles
from THRU to the end of the group). Additionally, any line beginning with 'X' is executed on
exit from the newsgroup rather than on entrance. This can be used to set switches back to a
default value. One use for this capability is to set your save directory to a custom value upon
entry to a newsgroup and set it back on exit using the -ESAVEDIR option. See also the -/ option
for another solution to multiple save directories without using KILL files.

r Reply through net mail. The environment variables MAILPOSTER and MAILHEADER may be used to
modify the mailing behavior of trn (see the environment section). If the current article does
not exist (such as the "End of newsgroup" pseudo-article you can get to with a '$' command),
invokes the mailer to nobody in particular.

R Reply, including the current article in the header file generated. (See 'F' command below). The
YOUSAID environment variable controls the format of the attribution line.

^F Forward the current article.

f Submit a follow-up article. If the current article does not exist (such as the "End of
newsgroup" pseudo-article you can get to with a '$' command), posts an original (root) article.

F Submit a follow-up article, and include the old article, with lines prefixed either by ">" or by
the argument to the -F switch. Trn will attempt to provide an attribution line in front of the
quoted article, generated from the From: line of the article. Unfortunately, the From: line
doesn't always contain the right name; you should double check it against the signature and
change it if necessary, or you may have to apologize for quoting the wrong person. The
environment variables NEWSPOSTER, NEWSHEADER and ATTRIBUTION may be used to modify the posting
behavior of trn (see environment section).

C Cancel the current article, but only if you are the contributor or superuser.

z Supersede the current article, but only if you are the contributor.

Z Same as the 'z' command, but you start with a copy of the original article to work with.

c Catch up in this newsgroup; i.e., mark all articles as read.

U Unkill articles. You can choose to unkill the current thread, sub-thread (the current article
and its replies), all the articles, or start up the selector to choose specific articles to
unkill.

u Unsubscribe from this newsgroup.

s destination
Save to a filename or pipe using sh. If the first character of the destination is a vertical
bar, the rest of the command is considered a shell command to which the article is passed through
standard input. The command is subject to filename expansion. (See also the environment
variable PIPESAVER.) If the destination does not begin with a vertical bar, the rest of the
command is assumed to be a filename of some sort. An initial tilde '~' will be translated to the
name of the home directory, and an initial environment variable substitution is also allowed. If
only a directory name is specified, the environment variable SAVENAME is used to generate the
actual name. If a non-absolute filename is specified, the environment variable SAVEDIR will be
used to generate the actual directory. If nothing is specified, then obviously both variables
will be used. Since the current directory for trn while doing a save command is your private
news directory, typing "s ./filename" will force the file to your news directory. Save commands
are also run through % interpretation, so that you can enter "s %O/filename" to save to the
directory you were in when you ran trn, and "s %t" to save to a filename consisting of the
Internet address of the sender.

After generating the full pathname of the file to save to, trn determines if the file exists
already, and if so, appends to it. trn will attempt to determine if an existing file is a
mailbox or a normal file, and save the article in the same format. If the output file does not
yet exist, trn will by default ask you which format you want, or you can make it skip the
question with either the -M or -N switch. If the article is to be saved in mailbox format, the
command to do so is generated from the environment variable MBOXSAVER. Otherwise, NORMSAVER is
used.

S destination
Save to a filename or pipe using a preferred shell, such as csh. Which shell is used depends
first on what you have the environment variable SHELL set to, and in the absence of that, on what
your news administrator set for the preferred shell when he or she installed trn.

⎪ command
Shorthand for "s ⎪ command".

w destination
The same as "s destination", but saves without the header.

W destination
The same as "S destination", but saves without the header.

e directory
Extract a shell archive or uuencoded binary to the designated directory. The article is first
scanned to try discover what type of data is encapsulated. If a "cut here" line is found, the
first non-blank line after it must be either the start of a shar header, or the "begin" or
"table" line of a uuencoded binary. The default for extracting shars is to send the data portion
of the file to /bin/sh, but that can be overridden with the UNSHAR variable (see the ENVIRONMENT
section). Uudecoding is done internally by a decoder that can handle the data being split up
over multiple articles, and extracted one piece at a time. To decode a multi-article file,
either execute the 'e' command in each article in sequence, use an article range to execute the
command, or use the ":e" command to repeat the command for each of the currently selected
articles. When the 'e' command is not followed by any arguments, it will repeat the arguments
from the last extraction. All directory specifications are relative to the value of SAVEDIR, so
you can use the command "e ." to force an extraction to SAVEDIR itself. If a uudecoding is in
progress (i.e. the last piece wasn't extracted yet) and you exit the group, the partial file will
be removed. This also occurs if you start to extract a new uuencoded file before the previous
one was finished. See also the 'E' command for ending a multi-part uudecoding manually.

There is one special case that is handled differently: if the first file in a recognizable shar
file is a uuencoded binary that was packed with lines starting with an 'X', we will not unshar
the file but instead uudecode it. If this causes problems, you can override the default
extraction method by following the directory with an explicit command to execute, as described
below.

e directory⎪command
This form of the 'e' command allows you to extract other data formats than shar or uuencoded
files or to override the decisions made by the automatic extraction selection described above.
In normal operation, all data following what we recognize as a "cut here" line will be sent to
the specified command. Additionally, the distinctive beginning of a shell archive is also
recognized without a preceding cut line. When the command is run, the default directory will be
set to the specified directory, or the value of SAVEDIR if unspecified. Entering the 'e' command
without arguments will repeat your previous extract command. You can use the command "e dir⎪" to
extract to a new directory using the previously-specified command.

E This command ends any multi-part uuencoded file extraction that you began, but are unable (or
unwilling) to complete. The partially extracted file is removed.

& Print out the current status of command-line switches.

&switch {switch}
Set additional command-line switches.

&& Print out current macro definitions.

&&keys commands
Define an additional macro.

!command
Escape to a subshell. One exclamation mark (!) leaves you in your own news directory. A double
exclamation mark (!!) leaves you in the spool directory of the current newsgroup. The
environment variable SHELL will be used if defined. If command is null, an interactive shell is
started.

You can use escape key substitutions described later to get to many run-time values. The command
is also run through % interpretation, in case it is being called from a range or search command.

+ Start the selector in the last-used mode. If the newsgroup is unthreaded and the default
selector mode is threads, we temporarily switch to subject selection unless manually overridden.

_a Start the selector in article mode.

_s Start the selector in subject mode.

_t Start the selector in thread mode.

_T Start the selector in thread mode unless the group isn't threaded, in which case we settle for
the subject selector.

= List subjects of unread articles.

# Print last article number.

_+ Select the entire thread associated with the current article.

_- Deselect the entire thread associated with the current article.

Pager Level

At the pager level (within an article), the prompt looks like this:

--MORE--(17%)

and a number of commands may be given:

SP Display next page.

x Display next page and decrypt as a rot13 message.

d Display half a page more.

CR Display one more line.

q Go to the end of the current article (don't mark it either read or unread). Leaves you at the
"What next?" prompt.

j Junk the current article. Mark it read and go to the end of the article.

^L Refresh the screen.

X Refresh the screen and decrypt as a rot13 message.

b Back up one page.

^E Display the last page of the article.

_C Switch to next available charset conversion.

t Display the entire article tree, including its associated subjects, and continue reading. If the
group is not currently threaded, it will be threaded first.

gpattern
Goto (search forward for) pattern within current article. Note that there is no space between
the command and the pattern. If the pattern is found, the page containing the pattern will be
displayed. Where on the page the line matching the pattern goes depends on the value of the -g
switch. By default the matched line goes at the top of the screen.

G Search for g pattern again.

^G This is a special version of the 'g' command that is for skipping articles in a digest. It is
equivalent to setting "-g4" and then executing the command "g^Subject:".

TAB This is another special version of the 'g' command that is for skipping inclusions of older
articles. It is equivalent to setting "-g4" and then executing the command "g^[^c]", where c is
the first character of the last line on the screen. It searches for the first line that doesn't
begin with the same character as the last line on the screen.

!command
Escape to a subshell.

The following commands skip the rest of the current article, then behave just as if typed to the "What
next?" prompt at the end of the article. See the documentation at the article selection level for these
commands.

# $ & / = ? A c C f F k K T ^K J , m M r R ^R u U v Y ^
p P ^P - < > [ ] { } number
range{,range} command{:command}

The following commands also skip to the end of the article, but have the additional effect of marking the
current article as read:

n N ^N e s S ⎪ w W

Miscellaneous facts about commands

An 'n' typed at either the "Last newsgroup" prompt or a "Last article" prompt will cycle back to the top
of the newsgroup or article list, whereas a 'q' will quit the level. (Note that 'n' does not mean "no",
but rather "next".) A space will of course do whatever is shown as the default, which will vary
depending on whether trn thinks you have more articles or newsgroups to read.

The 'b' (backup page) command may be repeated until the beginning of the article is reached. If trn is
suspended (via a ^Z), then when the job is resumed, a refresh (^L) will automatically be done (Berkeley-
type systems only). If you type a command such as '!' or 's' which takes you from the middle of the
article to the end, you can always get back into the middle by typing '^L'.

In multi-character commands such as '!', 's', '/', etc, you can interpolate various run-time values by
typing escape and a character. To find out what you can interpolate, type escape and 'h', or check out
the single character % substitutions for environment variables in the Interpretation and Interpolation
section, which are the same. Additionally, typing a double escape will cause any % substitutions in the
string already typed in to be expanded.

The Tree Display

When reading a threaded newsgroup, trn displays a character representation of the article tree in the
upper right corner of the header. For example, consider the following display:

(1)+-(1)--(2)--[2]
⎪-(1)+-<3>
⎪ \-[1]
\-(1)+-[1]--[1]
\-[1]

This tree represents an initial article that has three direct replies (the second column with three
(1)'s). Each reply has further replies branching off from them. In two cases the subject line was
altered in the reply, as indicated by the increasing numbers.

The third subject is not selected for reading, as indicated by the <>'s. Note you can always forcefully
visit an unselected article with 'N' and 'P' as well as the thread-navagation commands (which are
typically macro'ed to the arrow keys on your keypad).

When there is only one subject associated with a thread, all the nodes are marked with the number 1.
When the first subject change arrives, it is marked with the number 2, and so on. If you were to look at
this thread in the thread selector, the three subjects associated with it would be listed in the same
order as the ascending digits. In those rare cases where more than 9 subjects are associated with each
thread, the nodes are marked with the letters A-Z, and then by a-z.

The articles that have already been read are enclosed in ()'s, Unread articles are displayed in []'s, and
unread-but-unselected articles are displayed in <>'s. The currently displayed article has its entire
node highlighted in the display. The previously displayed article has only its number highlighted. If
the group has not been completely threaded yet, some articles will appear as (?) until trn can determine
if the referenced article truly exists or not. If you visit such an article and wait for trn to finish
threading the group, the screen will refresh as soon as the presence or absence of the article is
determined.

Options

Trn has a nice set of options to allow you to tailor the interaction to your liking. (You might like to
know that the author swears by "-x6ms +e -mu -S -XX -N -B -p".) These options may be set on the command
line, via the TRNINIT environment variable, via a file pointed to by the TRNINIT variable, or from within
trn via the & command. Options may generally be unset by typing "+switch". Options include:

-a causes trn to always thread the unread articles on entry to a group. Without this option trn may
enter a group in a partially-threaded state and process the unthreaded articles in the background.
The down side of this is that the tree display may not be complete when it is first displayed and
you may start out at an odd position in the first thread's article tree.

-A tells trn to attempt to create some default macros that will map your arrow keys to useful trn
functions (this is the default). Use +A to turn this behavior off.

-b will force trn to read each thread in a breadth-first order, rather than depth-first.

-B will turn on a spinner that twirls when trn is doing background article-processing. A gizmo for
those interested in what's going on behind the scenes.

-c checks for news without reading news. If a list of newsgroups is given on the command line, only
those newsgroups will be checked; otherwise all subscribed-to newsgroups are checked. Whenever the
-c switch is specified, a non-zero exit status from trn means that there is unread news in one of
the checked newsgroups. The -c switch does not disable the printing of newsgroups with unread news;
this is controlled by the -s switch. (The -c switch is not meaningful when given via the &
command.)

-C<number>
tells trn how often to checkpoint the .newsrc, in articles read. Actually, this number says when to
start thinking about doing a checkpoint if the situation is right. If a reasonable check-pointing
situation doesn't arise within 10 more articles, the .newsrc is check-pointed willy-nilly.

-d<directory name>
sets your private news directory to something other than ~/News. The directory name will be globbed
(via csh) if necessary (and if possible). The value of SAVEDIR (where articles are saved) is
initially set to this directory, but is often manipulated via the -/ option or by manipulating
SAVEDIR directly (perhaps via the memorized commands (the KILL file) for a group. Any KILL files
(see the K command in the Article Selection section) also reside in this directory and its
subdirectories, by default. In addition, shell escapes leave you in this directory.

-D<flags>
enables debugging output. See common.h for flag values. Warning: normally trn attempts to restore
your .newsrc when an unexpected signal or internal error occurs. This is disabled when any
debugging flags are set.

-e causes each page within an article to be started at the top of the screen, not just the first page.
(It is similar to the -c switch of more(1).) You never have to read scrolling text with this
switch. This is helpful especially at certain baud rates because you can start reading the top of
the next page without waiting for the whole page to be printed. It works nicely in conjunction with
the -m switch, especially if you use half-intensity for your highlight mode. See also the -L
switch.

-E<name>=<val>
sets the environment variable <name> to the value specified. Within trn, "&-ESAVENAME=%t" is
similar to "setenv SAVENAME '%t'" in csh, or "SAVENAME='%t'; export SAVENAME" in sh. Any
environment variables set with -E will be inherited by subprocesses of trn.

-f will make trn avoid various sleep calls and the prompt after the processing of the memorized
commands that are intended to allow you time to read a message before the screen clears. This
allows the advanced user to cruise along a little faster at the expense of readability. The -t
(terse) option turns on -f by default, but you can override this by specifying +f after the -t
option.

-F<string>
sets the prefix string for the 'F' follow-up command to use in prefixing each line of the quoted
article. For example, "-F<tab>" inserts a tab on the front of each line (which will cause long
lines to wrap around, unfortunately), "-F>>>>" inserts ">>>>" on every line, and "-F" by itself
causes nothing to be inserted, in case you want to reformat the text, for instance. The initial
default prefix is ">".

-g<line>
tells trn which line of the screen you want searched-for strings to show up on when you search with
the 'g' command within an article. The lines are numbered starting with 1. The initial default is
"-g1", meaning the first line of the screen. Setting the line to less than 1 or more than the
number of lines on the screen will set it to the last line of the screen.

-G selects the "fuzzy" processing on the go command when you don't type in a valid group name. With
this option on trn will attempt to find the group you probably meant to type, but it can be a little
slow about it, so it's not on by default.

-h<string>
hides (disables the printing of) all header lines beginning with string. For instance, -hx- will
disable the printing of all "X-Foo:" headers. Case is not significant. The default for
unrecognized headers can be set with the -hunrecognized option. Alternately you could use -h (no
string) to disable all headers except the Subject line and then use +h to select only those lines
you want to see. You may wish to use the baud-rate switch modifier below to hide more lines at
lower baud rates.

-H<string>
works just like -h except that instead of setting the hiding flag for a header line, it sets the
magic flag for that header line. Certain header lines have magic behavior that can be controlled
this way. At present, the following actions are caused by the flag for the particular line: the
Date line prints the date in local time if the group is threaded; the From line will only print the
commented portion of the user name; the Newsgroups line will only print when there are multiple
newsgroups; the Subject line will be underlined and (when threaded) the keyword 'Subject:' is
replaced by its subject number (e.g. [1]); and the Expires line will always be suppressed if there
is nothing on it. In fact, all of these actions are the default, and you must use +H to undo them.

-i=<number>
specifies how long (in lines) to consider the initial page of an article -- normally this is
determined automatically depending on baud rate. (Note that an entire article header will always be
printed regardless of the specified initial page length. If you are working at low baud rate and
wish to reduce the size of the headers, you may hide certain header lines with the -h switch.)

-I tells trn to append all new, unsubscribed groups to the end of the .newsrc.

-j forces trn to leave control characters unmolested in messages.

-J{<number>}
causes trn to join similar subjects into a common thread if they are the same up to the indicated
number of characters (the default is 30). You can turn this on and off for specific groups by
putting the following lines into your kill file for the group(s):

&-J30
X&+J

-k tells trn to ignore the THRU line when processing selection searches (i.e. searches with a command
portion that starts with a '+' or a '.') in the memorized commands (aka kill files). This is turned
on by default, so use +k if you want to turn it off.

-K is used to keep a trn from checking for new news while you're in the group. Use this when your
kill-file processing is so slow that you don't want the group to expand while you're reading. If
you only want specific groups to be affected, put these lines into your kill file for the group(s):

&-K
X&+K

-l disables the clearing of the screen at the beginning of each article, in case you have a bizarre
terminal.

-L tells trn to leave information on the screen as long as possible by not blanking the screen between
pages, and by using clear to end-of-line. (The more(1) program does this.) This feature works only
if you have the requisite termcap capabilities. The switch has no effect unless the -e switch is
set.

-m=<mode>
enables the marking of the last line of the previous page printed, to help the user see where to
continue reading. This is most helpful when less than a full page is going to be displayed. It may
also be used in conjunction with the -e switch, in which case the page is erased, and the first line
(which is the last line of the previous page) is highlighted. If -m=s is specified, the standout
mode will be used, but if -m=u is specified, underlining will be used. If neither =s or =u is
specified, standout is the default. Use +m to disable highlighting.

-M forces mailbox format in creating new save files. Ordinarily you are asked which format you want.

-N forces normal (non-mailbox) format in creating new save files. Ordinarily you are asked which
format you want.

-o will act like old versions of trn and not junk cross-referenced articles when using thread commands
to junk articles in the current group (such as the selector's 'X' command).

-O<mode>{<order>}
specifies the selector's mode and (optionally) the sort order. The modes are 'a'rticle, 's'ubject,
or 't'hread. The orders are 'd'ate, 's'ubject, 'a'uthor, article 'c'ount per group, 'n'umeric, or
subject-date 'g'roups. The order can be capitalized to reverse the indicated order. For example,
to choose the article selector in subject order specify "-Oas".

-p{opt}
tells trn to auto-select your postings and their replies as it encounters them in the various groups
you read. The optional parameter is either a '.', 'p', or '+' (it defaults to '.' if omitted) and
affects what command trn should execute when it encounters your postings. The default is to execute
the command "T." on each of your postings which tells trn to memorize the auto-selection of this
article and all its replies. Using -pp tells trn to use the same command, but start the selection
with the parent article, so that you see any other replies to the same article. Using -p+ tells trn
to select the whole thread that contains your reply.

-q bypasses the automatic check for new newsgroups when starting trn.

-Q<set>
defines the set of available charset conversions. This can be useful to restrict the available
conversions to those your terminal can handle and/or to specify an alternate default. The first
element of this set is taken as default for each article.

-r causes trn to restart in the last newsgroup read during a previous session with trn. It is
equivalent to starting up normally and then getting to the newsgroup with a g command.

-s with no argument suppresses the initial listing of newsgroups with unread news, whether -c is
specified or not. Thus -c and -s can be used together to test "silently" the status of news from
within your .login file. If -s is followed by a number, the initial listing is suppressed after
that many lines have been listed. Presuming that you have your .newsrc sorted into order of
interest, -s5 will tell you the 5 most interesting newsgroups that have unread news. This is also a
nice feature to use in your .login file, since it not only tells you whether there is unread news,
but also how important the unread news is, without having to wade through the entire list of unread
newsgroups. If no -s switch is given -s5 is assumed, so just putting "rn -c" into your .login file
is fine.

-S<number>
causes trn to enter subject search mode (^N) automatically whenever an unthreaded newsgroup is
started up with <number> unread articles or more. Additionally, it causes any 'n' typed while in
subject search mode to be interpreted as '^N' instead. (To get back out of subject search mode, the
best command is probably '^'.) If <number> is omitted, 3 is assumed.

-t puts trn into terse mode. This is more cryptic but useful for low baud rates. (Note that your
system administrator may have compiled trn with either verbose or terse messages only to save
memory.) You may wish to use the baud-rate switch modifier below to enable terse mode only at lower
baud rates.

-T allows you to type ahead of trn. Ordinarily trn will eat typeahead to prevent your autorepeating
space bar from doing a very frustrating thing when you accidentally hold it down. If you don't have
a repeating space bar, or you are working at low baud rate, you can set this switch to prevent this
behavior. You may wish to use the baud-rate switch modifier below to disable typeahead only at
lower baud rates.

-u sets the unbroken-subject-line mode in the selector, which simply truncates subjects that are too
long instead of dumping the middle portion prior to the last two words of the subject.

-U tells trn to not write the .newsrc file out after visiting each group. While this is "unsafe" it
can be faster if you have a really huge .newsrc.

-v sets verification mode for commands. When set, the command being executed is displayed to give some
feedback that the key has actually been typed. Useful when the system is heavily loaded and you
give a command that takes a while to start up.

-V will output trn's version number and quit.

-x{<number>}{<list>}
Enable the extended (threaded) features of trn beyond the rn compatibility mode (this may be the
default on your system, use +x if you yearn for the good ol' days). The <number> is the maximum
number of article-tree lines (from 0 to 11) you want displayed in your header. Use the <list> to
choose which thread selector styles you like ('s'hort, 'm'edium, or 'l'ong), and in what order they
are selected with the 'L' command. For example, use -xms to start with the medium display mode and
only switch between it and the short mode. You can omit either or both of the parameters, in which
case a default of -x6lms is assumed.

-X{<number>}{<commands>}
If you like using the selector, you'll probably want to use this option to make the selector command
(+) the default when a newsgroup is started up with at least <number> unread articles. (Your
installer may have chosen to make -X0 the default on your system.) It is also used to select which
commands you want to be the defaults while using the thread selector. For example, -X2XD will make
the thread selector the default command for entering a newsgroup with at least 2 unread articles,
and set the default command for the LAST page of the thread selector to be the X command and the
default command for all other pages to be the D command. Either or both parameters can be omitted,
as well as the second default command (e.g. -XX would change the default newsgroup entry to use the
selector and the default command for the last page of the selector to be 'X'). The default is -X0Z>
if just -X is specified. To set the default selector commands without having '+' be the default
entry into a newsgroup, specify a high number, like 9999.

-z sets the minimum number of minutes that must elapse before the active file is refetched to look for
new articles. A value of 0 or using +z turns this off.

-/ sets SAVEDIR to "%p/%c" and SAVENAME to "%a", which means that by default articles are saved in a
subdirectory of your private news directory corresponding to the name of the the current newsgroup,
with the filename being the article number. +/ sets SAVEDIR to "%p" and SAVENAME to "%^C", which by
default saves articles directly to your private news directory, with the filename being the name of
the current newsgroup, first letter capitalized. (Either +/ or -/ may be default on your system,
depending on the feelings of your news administrator when he, she or it installed trn.) You may, of
course, explicitly set SAVEDIR and SAVENAME to other values -- see discussion in the environment
section.

Any switch may be selectively applied according to the current baud-rate. Simply prefix the switch with
+speed to apply the switch at that speed or greater, and -speed to apply the switch at that speed or
less. Examples: -1200-hposted suppresses the Posted line at 1200 baud or less; +9600-m enables marking
at 9600 baud or more. You can apply the modifier recursively to itself also: +300-1200-t sets terse mode
from 300 to 1200 baud.

Similarly, switches may be selected based on terminal type:

-=vt100+T set +T on vt100
-=tvi920-ETERM=mytvi get a special termcap entry
-=tvi920-ERNMACRO=%./.rnmac.tvi
set up special key-mappings
+=paper-v set verify mode if not hardcopy

Some switch arguments, such as environment variable values, may require spaces in them. Such spaces
should be quoted via ", ', or \ in the conventional fashion, even when passed via TRNINIT or the &
command.

Regular Expressions

The patterns used in article searching are regular expressions such as those used by ed(1). In addition,
\w matches an alphanumeric character and \W a non-alphanumeric. Word boundaries may be matched by \b,
and non-boundaries by \B. The bracketing construct $ ... $ may also be used, and \digit matches the
digit'th substring, where digit can range from 1 to 9. \0 matches whatever the last bracket match
matched. Up to 10 alternatives may given in a pattern, separated by \⎪, with the caveat that
$ ... \⎪ ... $ is illegal.

Character Set Conversions

trn can use character set conversions when displaying articles. This helps users in non-English-speaking
countries to display special characters on 7-bit displays. trn assumes that articles use the ISO-8859-1
character set and converts the special characters (e.g., "umlauts") to a string of ASCII characters.
Currently the following conversions are supported (see the -Q option):

p Plain. No change. This is the default.

a ISO->ASCII. Special characters are mapped to ASCII, e.g. the umlaut-o character becomes oe.

m ISO->ASCII monospaced. Special characters are mapped to exactly one similar-looking ASCII character,
e.g. umlaut-o becomes o. Used where correct spacing is more important than accuracy.

t TeX->ISO. Assuming your display can handle the ISO-8859-1 charset, trn transforms umlauts in the TeX
notation, which is commonly used in Germany, to real ISO characters, e.g. "a becomes umlaut-a.

The selected conversion, if different from p, will be displayed in the article level and pager prompt.
The conversion is also used when including original articles in a reply or followup. It is not used when
saving articles to files.

Interpretation and Interpolation

Many of the strings that trn handles are subject to interpretations of several types. Under filename
expansion, an initial "~/" is translated to the name of your home directory, and "~name" is translated to
the login directory for the user specified. Filename expansion will also expand an initial environment
variable, and also does the backslash, caret and percent expansion mentioned below.

All interpreted strings go through backslash, caret and percent interpretation. The backslash escapes
are the normal ones (such as \n, \t, \033, etc.). The caret escapes indicate control codes (such as ^i,
^l, etc.). If you wish to pass through a backslash or a caret it must be escaped with a backslash. The
special percent escapes are similar to printf percent escapes. These cause the substitution of various
run-time values into the string. The following are currently recognized:

%a Current article number.

%A Full name of current article (%P/%c/%a).

%b Destination of last save command, often a mailbox.

%B The byte offset to the beginning of the part of the article to be saved, set by the save command.
The 's' and 'S' commands set it to 0, and the 'w' and 'W' commands set it to the byte offset of
the body of the article.

%c Current newsgroup, directory form.

%C Current newsgroup, dot form.

%d Full name of newsgroup directory (%P/%c).

%D "Distribution:" line from the current article.

%e The last command executed to extract data from an article.

%E The last directory where an extracted file went.

%f "From:" line from the current article, or the "Reply-To:" line if there is one. This differs
from %t in that comments (such as the full name) are not stripped out with %f.

%F "Newsgroups:" line for a new article, constructed from "Newsgroups:" and "Followup-To:" lines of
current article.

%g The general mode of trn, for use in conditional macros.

I Init mode.
s Selector mode.
r Rn mode.
i Input mode (newline terminated).
p Prompt mode (single-character input).
c Choice mode (multi-choice input).

%h Name of the header file to pass to the mail or news poster, containing all the information that
the poster program needs in the form of a message header. It may also contain a copy of the
current article. The format of the header file is controlled by the MAILHEADER and NEWSHEADER
environment variables.

%H Host name (your machine's name).

%i "Message-I.D.:" line from the current article, with <> guaranteed.

%I The reference indication mark for citing prior articles (see the -F switch.)

%l The news administrator's login name, if any.

%L Login name (yours).

%m The current mode of trn, for use in conditional macros.

i Initializing.
n Newsgroup-list level.
f End (finis) of newsgroup-list level.
t The thread/subject/article selector.
c Newsrc selector.
w Newsgroup selector.
j Addgroup selector.
l Option selector.
a Article level ("What next?").
e End of the article level.
p Pager level ("MORE" prompt).
u Unkill prompt.
d Selector mode prompt.
o Selector order prompt.
m Memorize thread command prompt.
r Memorize subject command prompt.
z Option edit prompt.
k Processing memorized (KILL-file) commands.
A Add this newsgroup?
B Abandon confirmation.
C Catchup confirmation.
D Delete bogus newsgroups?
F Is follow-up a new topic?
M Use mailbox format?
R Resubscribe to this newsgroup?
K Press any key prompt.

Note that yes/no questions are all upper-case modes. If, for example, you wanted to disallow
defaults on all yes/no questions, you could define the following macro:

\040 %(%m=[A-Z]?h: )

%M The number of articles marked to return via the 'M' command. If the same article is Marked
multiple times, "%M" counts it multiple times in the current implementation.

%n "Newsgroups:" line from the current article.

%N Full name (yours).

%o Organization (yours).

%O Original working directory (where you ran trn from).

%p Your private news directory, normally ~/News.

%P Public news spool directory, normally /usr/spool/news on systems that don't use NNTP.

%q The value of the last "quoted" input string (see the %" interp).

%r Last reference on references line of current article (parent article id).

%R References list for a new article, constructed from the references and article ID of the current
article.

%s Subject, with all Re's and (nf)'s stripped off.

%S Subject, with one "Re:" stripped off.

%t "To:" line derived from the "From:" and "Reply-To:" lines of the current article. This always
returns an Internet format address.

%T "To:" line derived from the "Path:" line of the current article to produce a uucp path.

%u The number of unread articles in the current newsgroup.

%U The number of unread articles in the current newsgroup, not counting the the current article.
When threads are selected, this count reflects only selected articles.

%v The number of unselected articles, not counting the current article if it is unselected.

%w The directory where mthreads keeps its tmp files.

%W The directory where thread files are placed.

%x The news library directory.

%X The trn library directory.

%z The length of the current article in bytes.

%Z The number of selected threads.

%~ Your home directory.

%. The directory containing your dot files, which is your home directory unless the environment
variable DOTDIR is defined when trn is invoked.

%# The current count for a multi-file save, starting with 1. This value is incremented by one for
each file saved or extracted within a single command.

%$ Current process number.

%/ Last search string.

%? A space unless the current interp string is > 79 characters, at which point it turns into a
newline.

%% A percent sign.

%{name} or %{name-default}
The environment variable "name".

%[name] The value of header line "Name:" from the current article. The "Name: " is not included. For
example "%D" and "%[distribution]" are equivalent. The name must be spelled out in full.

%`command`
Inserts the output of the command, with any embedded newlines translated to space.

%""prompt""
Prints prompt on the terminal, then inputs one string, and inserts it.

%(test_text=pattern?then_text:else_text)
If test_text matches pattern, has the value then_text, otherwise else_text. The ":else_text" is
optional, and if absent, interpolates the null string. The = may be replaced with != to negate
the test. To quote any of the meta-characters ('=', '?', ':', or ')'), precede with a backslash.

%digit The digits 1 through 9 interpolate the string matched by the nth bracket in the last pattern
match that had brackets. If the last pattern had alternatives, you may not know the number of
the bracket you want -- %0 will give you the last bracket matched.

Modifiers: to capitalize the first letter, insert '^': "%^C" produces something like "Rec.humor".
Inserting '_' causes the first letter following the last '/' to be capitalized: "%_c" produces
"rec/Humor".

Inserting '\' will insert a backslash before any characters that would be magic in a regular expression,
including '%': "%\C" produces "rec\.humor".

Inserting "'" will insert a backslash before any single-quotes in the result, suitable for enclosing in
single-quotes and sending to a shell: "'%'s'" might produce "'I'\''m a subject'".

Inserting "''" will insert a backslash before any double-quotes in the result, suitable for enclosing in
double-quotes and sending to a shell.

Inserting ">" will strip out just the address portion of an address string such as the From line.

Inserting ")" will strip out just the comment (real name) portion of an address string such as the From
line.

Inserting ":FMT" will format the result according to the printf-style FMT string: "%:-50.50s" left-
justifies the subject into a 50 character field.

ENVIRONMENT

The following environment variables are paid attention to by trn. In general the default values assumed
for these variables by trn are reasonable, so if you are using trn for the first time, you can safely
ignore this section. Note that the defaults below may not correspond precisely to the defaults on your
system. To find the actual defaults you would need to look in config.h and common.h in the trn source
directory, and the file INIT in the trn library directory.

Those variables marked (%) are subject to % interpolation, and those marked (~) are subject to both %
interpolation and ~ interpretation.

ATTRIBUTION (%)
Gives the format of the attribution line in front of the quoted article included by an F command.

Default: In article %i,%?%)f <%>f> wrote:

AUTOSUBSCRIBE
When trn is checking for new newsgroups and finds one matching one of the patterns in
AUTOSUBSCRIBE, the new group is automatically added to the end of the .newsrc, subscribed.
Newsgroups not matching this or AUTOUNSUBSCRIBE, below, are offered to the user.

AUTOSUBSCRIBE is a comma separated list of newsgroup patterns ala 'o', '/', etc. It can also
include "but not" entries preceded by '!'. "a,b,!c,d" is read as "matching a or b, unless it
also matches c; matching d regardless". Another way to look at it is "(((a or b) and not c) or
d)". To automatically subscribe to all local groups but be choosy about non-local groups, one
might say "*,!*.*".

Default: (none)

AUTOUNSUBSCRIBE
AUTOUNSUBSCRIBE is very similar to AUTOSUBSCRIBE, above, but new newsgroups matching it are
automatically added to the end of the .newsrc file, unsubscribed. If a newsgroup matches
AUTOSUBSCRIBE, AUTOUNSUBSCRIBE is not consulted.

Default: (none)

CANCEL (~)
The shell command used to cancel an article.

Default: inews -h < %h

CANCELHEADER (%)
The format of the file to pass to the CANCEL command in order to cancel an article.

Default:
Newsgroups: %n
Subject: cmsg cancel %i
References: %R
Reply-To: %L@%H (%N)
Distribution: %D
Organization: %o

%i cancelled from trn.

DOTDIR Where to find your dot files, if they aren't in your home directory. Can be interpolated using
"%.".

Default: $HOME

EDITOR (~)
The name of your editor, if VISUAL is undefined.

Default: whatever your news administrator compiled in, usually vi.

EXSAVER (%)
The shell command to execute in order to extract data to either /bin/sh or a user-specified
command.

Default: tail -c +%B %A ⎪ %e

FIRSTLINE (%)
Controls the format of the line displayed at the top of an article. Warning: this may go away.

The default (ignoring the Marked to return display in unthreaded groups) is approximately:

%C #%a%(%Z=^0$?%(%U!=^0$? (%U more\)): (%U + %v more\))

FORWARDHEADER (%)
The format of the header file for forwarding messages. See also FORWARDPOSTER.

Default:

To:
Subject: %(%i=^$?:[subject] (fwd\\)
%(%{REPLYTO}=^$?:Reply-To: %{REPLYTO}
)Newsgroups: %n
In-Reply-To: %i)
%(%[references]=^$?:References: %[references]
)Organization: %o
Cc:
Bcc: \n\n

FORWARDPOSTER (~)
The shell command to be used by the forward command (^F) in order to allow you to edit and
deliver the file. trn will not itself call upon an editor for replies -- this is a function of
the program referenced by FORWARDPOSTER. See also FORWARDHEADER and MAILPOSTER.

Default: Rnmail -h %h

FROM (%)
What to put in the From: header of your posts, email replies, and email forwards, instead of
whatever the default name and address are for your system. This will only work if you use the
default settings for the NEWSHEADER, MAILHEADER, and FORWARDHEADER variables, or if your custom
ones use FROM to set the From: header.

Regardless of the settings of NEWSHEADER, MAILHEADER, and FORWARDHEADER, the setting of FROM is
used to determine which articles may be cancelled or superseded.

Default: undefined

HIDELINE
If defined, contains a regular expression which matches article lines to be hidden, in order, for
instance, to suppress quoted material. A recommended string for this purpose is "^>...", which
doesn't hide lines with only '>', to give some indication that quoted material is being skipped.
If you want to hide more than one pattern, you can use "⎪" to separate the alternatives. You can
view the hidden lines by restarting the article with the 'v' command.

There is some overhead involved in matching each line of the article against a regular
expression. You might wish to use a baud-rate modifier to enable this feature only at low baud
rates.

Default: undefined

HOME Your home directory. Affects ~ interpretation, and the location of your dot files if DOTDIR is
not defined.

Default: $LOGDIR

KILLGLOBAL (~)
Where to find the KILL file to apply to every newsgroup. See the '^K' command at the newsgroup-
selection level.

Default: %p/KILL

KILLLOCAL (~)
Where to find the KILL file for the current newsgroup. See the commands 'K' and '^K' at the
article selection level, and the search modifier 'K'.

Default: %p/%c/KILL

LOGDIR Your home directory if HOME is undefined. Affects ~ interpretation, and the location of your dot
files if DOTDIR is not defined.

Default: none.

Explanation: you must have either $HOME or $LOGDIR.

LOGNAME Your login name, if USER is undefined. May be interpolated using "%L".

Default: value of getlogin().

LOCALTIMEFMT
The format used by strftime() to print the local time. The Date line is only displayed in local
time if the group is threaded (see the -H option for more information on Date).

Default: %a %b %e %X %Z %Y

which is the same format as the date(1) command.

MAILCALL (~)
What to say when there is new mail.

Default: (Mail)

MAILFILE (~)
Where to check for mail.

Default: /usr/spool/mail/%L

MAILHEADER (%)
The format of the header file for replies. See also MAILPOSTER.

Default:

To: %t
Subject: %(%i=^$?:Re: %S
%(%{REPLYTO}=^$?:Reply-To: %{REPLYTO}
)Newsgroups: %n
In-Reply-To: %i)
%(%[references]=^$?:References: %[references]
)Organization: %o
Cc:
Bcc: \n\n

MAILPOSTER (~)
The shell command to be used by the reply commands (r and R) in order to allow you to enter and
deliver the response. trn will not itself call upon an editor for replies -- this is a function
of the program referenced by MAILPOSTER. See also MAILHEADER.

Default: Rnmail -h %h

MBOXSAVER (~)
The shell command to save an article in mailbox format.

Default: %X/mbox.saver %A %P %c %a %B %C "%b" \
"From %t %`date`"

Explanation: the first seven arguments are the same as for NORMSAVER. The eighth argument to the
shell script is the new From line for the article, including the posting date, derived either
directly from the Posted: line, or not-so-directly from the Date: line. Header munging at its
finest.

MODSTRING
The string to insert in the group summary line, which heads each article, for a moderated group.
See also NOPOSTRING.

Default: " (moderated)"

NAME Your full name. May be interpolated using "%N".

Default: name from /etc/passwd, or ~/.fullname.

NEWSHEADER (%)
The format of the header file for follow-ups. See also NEWSPOSTER.

Default:

%(%[followup-to]=^$?:%(%[followup-to]=^%n$?:X-ORIGINAL-NEWSGROUPS: %n
))Newsgroups: %(%F=^$?%C:%F)
Subject: %(%S=^$?%"\n\nSubject: ":Re: %S)
Summary:
Expires:
%(%R=^$?:References: %R
)Sender:
Followup-To:
%(%{REPLYTO}=^$?:Reply-To: %{REPLYTO}
)Distribution: %(%i=^$?%"Distribution: ":%D)
Organization: %o
Keywords: %[keywords]
Cc: \n\n

NEWSORG Either the name of your organization, or the name of a file containing the name of your
organization. (For use at sites where the ORGANIZATION environmental variable is already in use.
NEWSORG will override ORGANIZATION if both are present.) May be interpolated using "%o".

Default: whatever your news administrator compiled in.

NEWSPOSTER (~)
The shell command to be used by the follow-up commands (f and F) in order to allow you to enter
and post a follow-up news article. If not set, trn handles the whole process and calls inews
directly. See also NEWSHEADER.

NNTPSERVER
The hostname of your NNTPSERVER. [This does not apply unless you are running the NNTP version of
trn.]

Default: the hostname listed in the server file, usually /usr/local/lib/rn/server.

NOPOSTRING
The string to insert in the group summary line, which heads each article, for a group to which
local posting is not allowed. See also MODSTRING.

Default: " (no posting)"

NORMSAVER (~)
The shell command to save an article in the normal (non-mailbox) format.

Default: %X/norm.saver %A %P %c %a %B %C "%b"

ORGANIZATION
Either the name of your organization, or the name of a file containing the name of your
organization. (If NEWSORG is set, it will override ORGANIZATION.) May be interpolated using
"%o".

Default: whatever your news administrator compiled in.

PAGESTOP
If defined, contains a regular expression which matches article lines to be treated as form-
feeds. There are at least two things you might want to do with this. To cause page breaks
between articles in a digest, you might define it as "^--------". To force a page break before a
signature, you could define it as "^-- $". (Then, when you see "--" at the bottom of the page,
you can skip the signature if you so desire by typing 'n' instead of space.) To do both, you
could use "^--". If you want to break on more than one pattern, you can use "⎪" to separate the
alternatives.

There is some overhead involved in matching each line of the article against a regular
expression. You might wish to use a baud-rate modifier to enable this feature only at low baud
rates.

Default: undefined

PIPESAVER (%)
The shell command to execute in order to accomplish a save to a pipe ("s ⎪ command" or
"w ⎪ command"). The command typed by the user is substituted in as %b.

Default: %(%B=^0$?<%A:tail -c +%B %A ⎪) %b

Explanation: if %B is 0, the command is "<%A %b", otherwise the command is "tail -c +%B %A ⎪ %b".

REPLYTO The value of the "Reply-To:" header, if needed.

RNINIT This variable is used when initializing trn in rn-compatibility mode (see the -x switch) or when
the TRNINIT variable isn't defined. See the TRNINIT variable for a description.

RNMACRO (~)
The name of the file containing macros and key mappings when running trn as rn. See also the
TRNMACRO variable and the CUSTOM MACROS section.

Default: %./.rnmac

SAVEDIR (~)
The name of the directory to save to, if the save command does not specify a directory name.

Default:
If -/ is set: %p/%c
If +/ is set: %p

SAVENAME (%)
The name of the file to save to, if the save command contains only a directory name.

Default:
If -/ is set: %a
If +/ is set: %^C

SELECTCHARS
The characters used by the thread selector to select the associated thread of discussion. You
can specify up to 64 visible characters, including upper- and lower-case letters, numbers, and
many punctuation characters. Selection characters override command characters in the selector,
but are not excluded from macro expansion, so be careful.
Default: abdefgijlorstuvwxyz1234567890BCFGHIKMVW
(You'll notice various characters are omitted to allow them to be typed as commands in the
selector.)

SHELL The name of your preferred shell. It will be used by the '!', 'S' and 'W' commands.

Default: whatever your news administrator compiled in.

SUBJLINE (%)
Controls the format of the lines displayed by the '=' command at the article selection level.

Default: %s

SUPERSEDEHEADER (%)
The format of the header file for a supersede article.

Default:

From: %L@%H (%N)
Newsgroups: %n
Subject: %S
Distribution: %D
Organization: %o
Supersedes: %i

TERM Determines which termcap entry to use, unless TERMCAP contains the entry.

TERMCAP Holds either the name of your termcap file, or a termcap entry.

Default: /etc/termcap, normally.

TRNINIT Default values for switches may be passed to trn by placing them in the TRNINIT variable (or
RNINIT if you're starting trn in rn-compatibility mode). Any switch that is set in this way may
be overruled on the command line, or via the '&' command from within trn. Binary-valued switches
that are set with "-switch" may be unset using "+switch".

If TRNINIT begins with a '/' it is assumed to be the name of a file containing switches. You can
put comments in this file by preceding them with a '#' as long as this is the first character on
a line or it follows some white-space (which delimits the switches in the file). If you want to
set many environment variables but don't want to keep them all in your environment, or if the use
of any of these variables conflicts with other programs, you can use this feature along with the
-E switch to set the environment variables upon startup.

Default: " ".

TRNMACRO (~)
The name of the file containing macros and key mappings. If the file is not found, the RNMACRO
variable is used to look for your rn macros. For information on what to put into this file, see
the CUSTOM MACROS section.

Default: %./.trn/macros

UNSHAR (~)
The shell command to execute in order to accomplish the unshar'ing of a shell archive.

Default: /bin/sh

USER Your login name. May be interpolated using "%L".

Default: $LOGNAME

VISUAL (~)
The name of your editor.

Default: $EDITOR

XTERMMOUSE
If you set this variable to 'y' (yes), trn will enable the use of the xterm mouse in the selector
if you are using an xterm. Once enabled left-clicking on an item selects it while middle-
clicking an item will move to that item. If you click the top (header) line of the selector it
moves up a page. If you click the bottom (footer) line of the selector it executes the default
command for the page (left click) or goes down a page (middle click). You can also use the right
mouse button to move up or down a page by clicking in the upper-half or lower-half of the screen,
respectively.

YOUSAID (%)
Gives the format of the attribution line in front of the quoted article included by an R command.

Default: In article %i you write:

AUTOMATIC MACROS

       On  startup  trn  attempts  to build a set of macros that map your keypad arrow keys to useful functions.
       These default actions are mentioned in the prior description of each level's commands.  If you don't like
       this (or trn gets it wrong), you can disable the automatic macros by using the -A option.

CUSTOM MACROS

       When  trn  starts up it looks for a file containing macro definitions (see environment variables TRNMACRO
       and RNMACRO).  Any sequence of commands may be bound to any sequence of keys, so you  could  re-map  your
       entire  keyboard  if  you desire.  Blank lines or lines beginning with # in the macro file are considered
       comments; otherwise trn looks for two fields separated  by  white  space.   The  first  field  gives  the
       sequence  of  keystrokes  that  trigger the macro, and the second field gives the sequence of commands to
       execute.  Both fields are subject to % interpolation, which  will  also  translate  backslash  and  caret
       sequences.   (The keystroke field is interpreted at startup time, but the command field is interpreted at
       macro execution time so that you may refer to % values in a macro.)  For example, if you want to  reverse
       the roles of carriage return and space in trn

       ^J   \040
       ^M   \040
       \040 ^J

       will  do just that.  By default, all characters in the command field are interpreted as the canonical trn
       characters, i.e. no macro expansion is done.  Otherwise the above pair of macros would cause an  infinite
       loop.  To force macro expansion in the command field, enclose the macro call with ^( ... ^) thusly:

       @s   ⎪mysavescript
       @w   w^(@s^)

       You  can  use  the  %()  conditional  construct to construct macros that work differently under different
       circumstances.  In particular, the current mode (%m) of trn could be used to make  a  command  that  only
       works  at  a particular level.  This is particularly vital for the selector which uses most of the lower-
       case letters to select the associated item in its display.  For example,

       a    %(%m=t?a:s art.hold\n)

       will return the original letter (a) in the selector, and the command "s art.hold\n" everywhere else.

       %(%{TERM}=vt100?^[[O)    /^J

       will do the binding only if the terminal type is vt100, though if you have many  of  these  it  would  be
       better to have separate files for each terminal.

       If  you  want  to  bind a macro to a function key that puts a common garbage character after the sequence
       (such as the carriage return on the end of Televideo 920 function sequences), DO  NOT  put  the  carriage
       return  into  all  the sequences or you will waste a CONSIDERABLE amount of internal storage.  Instead of
       "^AF^M", put "^AF+1", which indicates to trn that it should gobble up one character after the F.

WHAT'S NEW

Here's a quick run-down of trn's features and commands aimed at the knowledgeable rn or trn user.

The addition of true reference-line threading is one of the biggest improvements over rn. This threading
allows you to read a discussion in reply order with an article's replies being attached to the article
that inspired them. Threads will encompass multiple subjects whenever a reply to an article in the
thread arrives with a different subject. This is usually done to better indicate the topic in the reply
when it diverges from the original subject.

Another big improvement is the selector, which is bound to the '+' key. The selector displays a list of
threads, subjects, or individual articles to allow you to select the topics that interest you by typing
their associated letter. The difference between the thread and the subject selector is that the subject
selector displays all subjects with a separate selection letter, even those tied together via their
references. This can be quite useful if you select some threads and desire to weed out some extraneous
discussions: you could switch the selector into exclusive mode ('E' shows only selected threads) and then
into subject mode ('Ss') to separate the threads into their component subjects and deselect or kill the
subjects you don't care about. You don't have to go to all this trouble using the selector if you prefer
to just hit the 'k' key when you start reading a subject you're not interested in. The selector can also
switch between showing unread articles and articles that have already been read, allowing you to
selectively re-read discussions (this is the 'U' command in the selector).

Another threaded addition is the article-tree display in the upper-right corner of the header. Looking
at the tree gives you a feel for how the articles you are reading relate to each other, allowing you to
see at a glance when there are lots of replies and decide if you want to junk an uninteresting set of
replies or perhaps tough it out.

The header display has also been modified to hide a few more lines by default (e.g. References), but, as
always, you can override these with -h. There is also some more "magic" in the header: the From header
can be trimmed to be just the comment portion (if available), and the Date header is displayed in local
time (by default). Use -H and +H to turn header magic on and off.

Once you begin reading articles, use the regular movement commands (n, N, p, P, etc.) as you normally
would. You'll find that these commands track the reply order shown in the tree display. Then try using
^N and ^P, which follow a subject in the order the articles were posted. Finally, check out the [, ], (,
), {, and } commands to move around in the article tree a bit more directly. The first four commands
should also be bound to your keypad's arrow keys, making them easier to type. For example, typing '['
(left) takes you to your parent article, even if it was already read, which is very useful for tracking
down the cited portion of the article in its original context.

There are additional kill commands for the entire thread (J) and the current article and all its replies
(,).

The KILL files have been extended and the commands inside them are now referred to memorized commands,
since they are often used for selection rather than killing of articles. There are new, easier ways to
add memorized commands using the 'A'dd and 'T'hread commands. The 'A' command is subject-oriented, while
the 'T' command is article-oriented (meaning they affect a specific set of articles rather than any
article that happens to have a matching subject). They both prompt you for what kind of command you want
to add, making both auto-killing and auto-selecting just as easy.

There is also an easy way to skip around among the various threads with the < and > commands. Use them
if you want to skip a set of article and read them later instead of junking them.

Note: your news administrator has the option of turning thread processing off for individual groups, and
thus it is possible for some groups to not have any pre-processed thread information available for use.
When trn encounters such a group, it generates the thread information on the fly while entering the
group. For really large groups (or really slow systems), this can take an appreciable amount of time.
If you can't talk your news administrator into pre-threading the group, you can turn off the threading on
a group-by-group basis using the 't' command at the newsgroup-selection level. Groups turned off in this
way are read in the rn style -- articles arranged in arrival order unless you specify the -S option,
which reads the articles in date order by subject.

Take note of the "e dir" command, which is used to extract a shell archive or uuencoded file into the
specified directory. It is even possible to extract other data formats if you specify the appropriate
filter command (e.g. "e dir⎪cmd".

Also, if you plan to use macro definitions, it is good to keep in mind that the selector uses most of the
lower-case letters for selection, and thus it is a good idea to explicitly set the mode(s) in which a
macro applies. For example, if you want to press 'f' from the article pager/selector to forward the
current article to the user "smith", you could define:

f %(%m=[pa]?⎪mail smith\n:f)

This checks the current mode (%m) and if it is 'p' or 'a' it expands it to the string "⎪mail smith\n",
otherwise it returns the letter 'f'. In some cases, you may simply wish to exclude the selector from a
macro with the conditional "%m!=t".

Finally, you'll probably want to use the new options, -x and -X to ensure that all the newest features
are available for use. These options might be on by default, depending on how your administrator decided
to install trn.

AUTHORS

       Rn was created by Larry Wall <lwall@jpl-devvax.jpl.nasa.gov>
       and is now under the direction of Stan Barber <sob@bcm.tmc.edu>.
       Threaded version by Wayne Davison <wayne@clari.net>
       (Mail all bug reports for trn to Wayne.)
       Regular expression routines are borrowed from emacs, by James Gosling.
       Hashing routines are modified versions from Geoffrey Collyer.

FILES

       %./.newsrc  status of your news reading

       %./.oldnewsrc
                   backup copy of your .newsrc from start of session

       %./.rnlock  lock file so you don't screw up your .newsrc

       %./.rnlast  info from last run of trn

       %./.rnsoft  soft pointers into /usr/lib/news/active to speed startup, synchronous with .newsrc

       %./.rnhead  temporary header file to pass to a mailer or news poster

       %./.[t]rnmac
                   macro and keymap definitions

       %p          your news save directory, usually ~/News

       %x/active   the list of active newsgroups, usually /usr/lib/news/active on systems that don't use NNTP

       %P          the public news spool directory, usually /usr/spool/news on systems that don't use NNTP

       %X/INIT     system-wide default switches

DIAGNOSTICS

       Generally self-documenting, as they say.

BUGS

       The -h switch can only hide header lines that trn knows about.

       The '-' command doesn't cross newsgroup boundaries, and only undoes the last article selection.

       If  you edit your .newsrc while trn is running, trn will happily wipe out your changes when it decides to
       write out the .newsrc file.

       Marking of duplicate articles as read in cross-referenced newsgroups will not work unless the Xref  patch
       is installed in inews.

       If you get carried away with % or escape substitutions, you can overflow buffers.

NAME

SYNOPSIS

DESCRIPTION

ENVIRONMENT

AUTOMATIC MACROS

CUSTOM MACROS

WHAT'S NEW

AUTHORS

FILES

SEE ALSO

DIAGNOSTICS

BUGS