mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 19:51:11 +00:00
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Argp example #2 -- a pretty minimal program using argp */
|
|
|
|
/* This program doesn't use any options or arguments, but uses
|
|
argp to be compliant with the GNU standard command line
|
|
format.
|
|
|
|
In addition to making sure no arguments are given, and
|
|
implementing a --help option, this example will have a
|
|
--version option, and will put the given documentation string
|
|
and bug address in the --help output, as per GNU standards.
|
|
|
|
The variable ARGP contains the argument parser specification;
|
|
adding fields to this structure is the way most parameters are
|
|
passed to argp_parse (the first three fields are usually used,
|
|
but not in this small program). There are also two global
|
|
variables that argp knows about defined here,
|
|
ARGP_PROGRAM_VERSION and ARGP_PROGRAM_BUG_ADDRESS (they are
|
|
global variables because they will almost always be constant
|
|
for a given program, even if it uses different argument
|
|
parsers for various tasks). */
|
|
|
|
#include <argp.h>
|
|
|
|
const char *argp_program_version =
|
|
"argp-ex2 1.0";
|
|
const char *argp_program_bug_address =
|
|
"<bug-gnu-utils@@gnu.org>";
|
|
|
|
/* Program documentation. */
|
|
static char doc[] =
|
|
"Argp example #2 -- a pretty minimal program using argp";
|
|
|
|
/* Our argument parser. The @code{options}, @code{parser}, and
|
|
@code{args_doc} fields are zero because we have neither options or
|
|
arguments; @code{doc} and @code{argp_program_bug_address} will be
|
|
used in the output for @samp{--help}, and the @samp{--version}
|
|
option will print out @code{argp_program_version}. */
|
|
static struct argp argp = { 0, 0, 0, doc };
|
|
|
|
int main (int argc, char **argv)
|
|
{
|
|
argp_parse (&argp, argc, argv, 0, 0, 0);
|
|
exit (0);
|
|
}
|