@example
msgexec [@var{option}] @var{command} [@var{command-option}]
@end example

The @code{msgexec} program applies a command to all translations of a
translation catalog.
The @var{command} can be any program that reads a translation from standard
input.  It is invoked once for each translation.  Its output becomes
msgexec's output.  @code{msgexec}'s return code is the maximum return code
across all invocations.

A special builtin command called @samp{0} outputs the translation, followed
by a null byte.  The output of @samp{msgexec 0} is suitable as input for
@samp{xargs -0}.

During each @var{command} invocation, the environment variable
@code{MSGEXEC_MSGID} is bound to the message's msgid, and the environment
variable @code{MSGEXEC_LOCATION} is bound to the location in the PO file
of the message.

Note: It is your responsibility to ensure that the @var{command} can cope
with input encoded in the translation catalog's encoding.  If the
@var{command} wants input in a particular encoding, you can in a first step
convert the translation catalog to that encoding using the @samp{msgconv}
program, before invoking @samp{msgexec}.  If the @var{command} wants input
in the locale's encoding, but you want to avoid the locale's encoding, then
you can first convert the translation catalog to UTF-8 using the
@samp{msgconv} program and then make @samp{msgexec} work in an UTF-8
locale, by using the @code{LC_ALL} environment variable.

@subsection Input file location

@table @samp
@item -i @var{inputfile}
@itemx --input=@var{inputfile}
Input PO file.

@item -D @var{directory}
@itemx --directory=@var{directory}
Add @var{directory} to the list of directories.  Source files are
searched relative to this list of directories.  The resulting @file{.po}
file will be written relative to the current directory, though.

@end table

If no @var{inputfile} is given or if it is @samp{-}, standard input is read.

@subsection Informative output

@table @samp
@item -h
@itemx --help
Display this help and exit.

@item -V
@itemx --version
Output version information and exit.

@end table