msggrep - pattern matching on message catalog

NAME  SYNOPSIS  DESCRIPTION  Input file location:  Output file location:  Message selection:  Input file syntax:  Output details:  Informative output:  AUTHOR  REPORTING BUGS  COPYRIGHT  SEE ALSO 


msggrep − pattern matching on message catalog




Extracts all messages of a translation catalog that match a given pattern or belong to some given source files.

Mandatory arguments to long options are mandatory for short options too.

Input file location:


input PO file

−D, −−directory=DIRECTORY

add DIRECTORY to list for input files search

If no input file is given or if it is −, standard input is read.

Output file location:

−o, −−output−file=FILE

write output to specified file

The results are written to standard output if no output file is specified or if it is −.

Message selection:


A message is selected if it comes from one of the specified source files, or if it comes from one of the specified domains, or if −J is given and its context (msgctxt) matches MSGCTXT−PATTERN, or if −K is given and its key (msgid or msgid_plural) matches MSGID−PATTERN, or if −T is given and its translation (msgstr) matches MSGSTR−PATTERN, or if −C is given and the translator’s comment matches COMMENT−PATTERN, or if −X is given and the extracted comment matches EXTRACTED−COMMENT−PATTERN.

When more than one selection criterion is specified, the set of selected messages is the union of the selected messages of each criterion.


[−E | −F] [−e PATTERN | −f FILE]...

PATTERNs are basic regular expressions by default, or extended regular expressions if −E is given, or fixed strings if −F is given.
, −−location=SOURCEFILE

select messages extracted from SOURCEFILE

−M, −−domain=DOMAINNAME

select messages belonging to domain DOMAINNAME

−J, −−msgctxt

start of patterns for the msgctxt

−K, −−msgid

start of patterns for the msgid

−T, −−msgstr

start of patterns for the msgstr

−C, −−comment

start of patterns for the translator’s comment

−X, −−extracted−comment

start of patterns for the extracted comment

−E, −−extended−regexp

PATTERN is an extended regular expression

−F, −−fixed−strings

PATTERN is a set of newline−separated strings

−e, −−regexp=PATTERN

use PATTERN as a regular expression

−f, −−file=FILE

obtain PATTERN from FILE

−i, −−ignore−case

ignore case distinctions

−v, −−invert−match

output only the messages that do not match any selection criterion

Input file syntax:

−P, −−properties−input

input file is in Java .properties syntax


input file is in NeXTstep/GNUstep .strings syntax

Output details:


use colors and other text attributes always


use colors and other text attributes if WHEN. WHEN may be ’always’, ’never’, ’auto’, or ’html’.


specify CSS style rule file for −−color


do not use C escapes in output (default)


use C escapes in output, no extended chars


write PO file even if empty


indented output style


suppress ’#: filename:line’ lines

−n, −−add−location

preserve ’#: filename:line’ lines (default)


strict Uniforum output style

−p, −−properties−output

write out a Java .properties file


write out a NeXTstep/GNUstep .strings file

−w, −−width=NUMBER

set output page width


do not break long message lines, longer than the output page width, into several lines


generate sorted output


sort output by file location

Informative output:

−h, −−help

display this help and exit

−V, −−version

output version information and exit


Written by Bruno Haible.


Report bugs in the bug tracker at <> or by email to <bug−[email protected]>.


Copyright © 2001−2023 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


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

info msggrep

should give you access to the complete manual.

Updated 2024-01-29 - |