xenial (1) ssed.1.gz

Provided by: ssed_3.62-7_amd64 bug

NAME

       ssed - super sed stream editor version 3.61

SYNOPSIS

       sed [OPTION]... {script-only-if-no-other-script} [input-file]...

DESCRIPTION

       Sed is a stream editor.  A stream editor is used to perform basic text transformations on an input stream
       (a file or input from a pipeline).  While in some ways similar to an editor which permits scripted  edits
       (such  as  ed),  sed works by making only one pass over the input(s), and is consequently more efficient.
       But it is sed's ability to filter text in a pipeline which particularly distinguishes it from other types
       of editors.

       -n, --quiet, --silent

              suppress automatic printing of pattern space

       -e script, --expression=script

              add the script to the commands to be executed

       -f script-file, --file=script-file

              add the contents of script-file to the commands to be executed

       -i[SUFFIX], --in-place[=SUFFIX]

              edit files in place (makes backup if extension supplied)

       -l N, --line-length=N

              specify the desired line-wrap length for the `l' command

       --posix

              disable all GNU extensions.

       -r, --regexp-extended

              use extended regular expressions in the script.

       -R, --regexp-perl

              use Perl 5's regular expressions syntax in the script.

       -s, --separate

              consider files as separate rather than as a single continuous long stream.

       -u, --unbuffered

              load minimal amounts of data from the input files and flush the output buffers more often

       --help
              display this help and exit

       --version
              output version information and exit

       If no -e, --expression, -f, or --file option is given, then the first non-option argument is taken as the
       sed script to interpret.  All remaining arguments are names  of  input  files;  if  no  input  files  are
       specified, then the standard input is read.

       E-mail  bug  reports  to:  bonzini@gnu.org  .   Be  sure  to  include  the word ``ssed'' somewhere in the
       ``Subject:'' field.

       based on GNU sed version 4.1

COMMAND SYNOPSIS

       This is just a brief synopsis of sed commands to serve as a reminder to those who already know sed; other
       documentation (such as the texinfo document) must be consulted for fuller descriptions.

   Zero-address ``commands''
       : label
              Label for b and t commands.

       #comment
              The comment extends until the next newline (or the end of a -e script fragment).

       }      The closing bracket of a { } block.

   Zero- or One- address commands
       =      Print the current line number.

       a \

       text   Append text, which has each embedded newline preceded by a backslash.

       i \

       text   Insert text, which has each embedded newline preceded by a backslash.

       q      Immediately  quit  the  sed script without processing any more input, except that if auto-print is
              not disabled the current pattern space will be printed.

       Q      Immediately quit the sed script without processing any more input.

       r filename
              Append text read from filename.

       R filename
              Append a line read from filename.

   Commands which accept address ranges
       {      Begin a block of commands (end with a }).

       b label
              Branch to label; if label is omitted, branch to end of script.

       t label
              If a s/// has done a successful substitution since the last input line was read and since the last
              t or T command, then branch to label; if label is omitted, branch to end of script.

       T label
              If  no  s///  has  done a successful substitution since the last input line was read and since the
              last t or T command, then branch to label; if label is omitted, branch to end of script.

       c \

       text   Replace the selected lines with text, which has each embedded newline preceded by a backslash.

       d      Delete pattern space.  Start next cycle.

       D      Delete up to the first embedded newline in the pattern space.  Start next cycle, but skip  reading
              from the input if there is still data in the pattern space.

       h H    Copy/append pattern space to hold space.

       g G    Copy/append hold space to pattern space.

       x      Exchange the contents of the hold and pattern spaces.

       l      List out the current line in a ``visually unambiguous'' form.

       n N    Read/append the next line of input into the pattern space.

       p      Print the current pattern space.

       P      Print up to the first embedded newline of the current pattern space.

       s/regexp/replacement/
              Attempt  to  match  regexp against the pattern space.  If successful, replace that portion matched
              with replacement.  The replacement may contain the special character & to refer to that portion of
              the  pattern  space  which  matched,  and  the  special  escapes  \1  through  \9  to refer to the
              corresponding matching sub-expressions in the regexp.

       w filename
              Write the current pattern space to filename.

       W filename
              Write the first line of the current pattern space to filename.

       y/source/dest/
              Transliterate the characters in the pattern space which appear  in  source  to  the  corresponding
              character in dest.

Addresses

       Sed  commands  can  be  given with no addresses, in which case the command will be executed for all input
       lines; with one address, in which case the command will only be executed for input lines which match that
       address;  or  with  two  addresses,  in which case the command will be executed for all input lines which
       match the inclusive range of lines starting from the first address and continuing to the second  address.
       Three  things  to note about address ranges: the syntax is addr1,addr2 (i.e., the addresses are separated
       by a comma); the line which addr1 matched will always be accepted, even if addr2 selects an earlier line;
       and if addr2 is a regexp, it will not be tested against the line that addr1 matched.

       After  the address (or address-range), and before the command, a !  may be inserted, which specifies that
       the command shall only be executed if the address (or address-range) does not match.

       The following address types are supported:

       number Match only the specified line number.

       first~step
              Match every step'th line starting with line first.  For example, ``sed -n 1~2p''  will  print  all
              the  odd-numbered  lines  in  the  input  stream, and the address 2~5 will match every fifth line,
              starting with the second. (This is an extension.)

       $      Match the last line.

       /regexp/
              Match lines matching the regular expression regexp.

       \cregexpc
              Match lines matching the regular expression regexp.  The c may be any character.

       GNU sed also supports some special 2-address forms:

       0,addr2
              Start out in "matched first address" state, until addr2 is found.  This  is  similar  to  1,addr2,
              except  that  if addr2 matches the very first line of input the 0,addr2 form will be at the end of
              its range, whereas the 1,addr2 form will still be at the beginning of its range.

       addr1,+N
              Will match addr1 and the N lines following addr1.

       addr1,~N
              Will match addr1 and the lines following addr1 until the next line whose input line  number  is  a
              multiple of N.

REGULAR EXPRESSIONS

       POSIX.2  BREs  should  be  supported, but they aren't completely because of performance problems.  The \n
       sequence in a regular expression matches the newline character, and  similarly  for  \a,  \t,  and  other
       sequences.

BUGS

       E-mail bug reports to bonzini@gnu.org.  Be sure to include the word ``sed'' somewhere in the ``Subject:''
       field.  Also, please include the output of ``sed --version'' in  the  body  of  your  report  if  at  all
       possible.

       Copyright © 2003 Free Software Foundation, Inc.
       This  is  free  software;  see  the  source  for  copying conditions.  There is NO warranty; not even for
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, to the extent permitted by law.

SEE ALSO

       awk(1), ed(1), grep(1), tr(1), perlre(1), sed.info, any of various books on sed, the sed FAQ
       (http://sed.sf.net/grabbag/tutorials/sedfaq.html), http://sed.sf.net/grabbag/.

       The full documentation for super-sed is maintained as a Texinfo manual.  If the info and super-sed
       programs are properly installed at your site, the command

              info sed

       should give you access to the complete manual.