| msggrep − pattern matching on message catalog | 
| msggrep [OPTION] [INPUTFILE] | 
| 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: | 
| INPUTFILE | 
| 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: | 
| [-N SOURCEFILE]... [-M DOMAINNAME]... [-J MSGCTXT-PATTERN] [-K MSGID-PATTERN] [-T MSGSTR-PATTERN] [-C COMMENT-PATTERN] [-X EXTRACTED-COMMENT-PATTERN] | 
| 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. MSGCTXT-PATTERN or MSGID-PATTERN or MSGSTR-PATTERN or COMMENT-PATTERN or EXTRACTED-COMMENT-PATTERN syntax: | 
| [-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. | 
| −N, −−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 | 
| −−stringtable−input | 
| input file is in NeXTstep/GNUstep .strings syntax | 
| Output details: | 
| −−color | 
| use colors and other text attributes always | 
| −−color=WHEN | 
| use colors and other text attributes if WHEN. WHEN may be ’always’, ’never’, ’auto’, or ’html’. | 
| −−style=STYLEFILE | 
| specify CSS style rule file for −−color | 
| −−no−escape | 
| do not use C escapes in output (default) | 
| −−escape | 
| use C escapes in output, no extended chars | 
| −−force−po | 
| write PO file even if empty | 
| −−indent | 
| indented output style | 
| −−no−location | 
| suppress ’#: filename:line’ lines | 
| −−add−location | 
| preserve ’#: filename:line’ lines (default) | 
| −−strict | 
| strict Uniforum output style | 
| −p, −−properties−output | 
| write out a Java .properties file | 
| −−stringtable−output | 
| write out a NeXTstep/GNUstep .strings file | 
| −w, −−width=NUMBER | 
| set output page width | 
| −−no−wrap | 
| do not break long message lines, longer than the output page width, into several lines | 
| −−sort−output | 
| generate sorted output | 
| −−sort−by−file | 
| 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 to <bug-gnu-gettext@gnu.org>. | 
| Copyright © 2001-2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html> | 
| 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. |