Provided by: trn4_4.0-test77-11build1_amd64 
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
SEE ALSO
newsrc(5), more(1), readnews(1), Pnews(1), Rnmail(1)
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.