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/* Test program for argp argument parser
Copyright (C) 1997-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <argp.h>
const char *argp_program_version = "argp-test 1.0";
struct argp_option sub_options[] =
{
{"subopt1", 's', 0, 0, "Nested option 1"},
{"subopt2", 'S', 0, 0, "Nested option 2"},
{ 0, 0, 0, 0, "Some more nested options:", 10},
{"subopt3", 'p', 0, 0, "Nested option 3"},
{"subopt4", 'q', 0, 0, "Nested option 4", 1},
{0}
};
static const char sub_args_doc[] = "STRING...\n-";
static const char sub_doc[] = "\vThis is the doc string from the sub-arg-parser.";
static error_t
sub_parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_NO_ARGS:
printf ("NO SUB ARGS\n");
break;
case ARGP_KEY_ARG:
printf ("SUB ARG: %s\n", arg);
break;
case 's' : case 'S': case 'p': case 'q':
printf ("SUB KEY %c\n", key);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
sub_help_filter (int key, const char *text, void *input)
{
if (key == ARGP_KEY_HELP_EXTRA)
return strdup ("This is some extra text from the sub parser (note that it \
is preceded by a blank line).");
else
return (char *)text;
}
static struct argp sub_argp = {
sub_options, sub_parse_opt, sub_args_doc, sub_doc, 0, sub_help_filter
};
/* Structure used to communicate with the parsing functions. */
struct params
{
unsigned foonly; /* Value parsed for foonly. */
unsigned foonly_default; /* Default value for it. */
};
#define OPT_PGRP 1
#define OPT_SESS 2
struct argp_option options[] =
{
{"pid", 'p', "PID", 0, "List the process PID"},
{"pgrp", OPT_PGRP,"PGRP",0, "List processes in the process group PGRP"},
{"no-parent", 'P', 0, 0, "Include processes without parents"},
{0, 'x', 0, OPTION_ALIAS},
{"all-fields",'Q', 0, 0, "Don't elide unusable fields (normally"
" if there's some reason ps can't"
" print a field for any process, it's"
" removed from the output entirely)" },
{"reverse", 'r', 0, 0, "Reverse the order of any sort"},
{"gratuitously-long-reverse-option", 0, 0, OPTION_ALIAS},
{"session", OPT_SESS,"SID", OPTION_ARG_OPTIONAL,
"Add the processes from the session"
" SID (which defaults to the sid of"
" the current process)" },
{0,0,0,0, "Here are some more options:"},
{"foonly", 'f', "ZOT", OPTION_ARG_OPTIONAL, "Glork a foonly"},
{"zaza", 'z', 0, 0, "Snit a zar"},
{0}
};
static const char args_doc[] = "STRING";
static const char doc[] = "Test program for argp."
"\vThis doc string comes after the options."
"\nHey! Some manual formatting!"
"\nThe current time is: %s";
static void
popt (int key, char *arg)
{
char buf[12];
if (isprint (key))
sprintf (buf, "%c", key);
else
sprintf (buf, "%d", key);
if (arg)
printf ("KEY %s: %s\n", buf, arg);
else
printf ("KEY %s\n", buf);
}
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
struct params *params = state->input;
switch (key)
{
case ARGP_KEY_NO_ARGS:
printf ("NO ARGS\n");
break;
case ARGP_KEY_ARG:
if (state->arg_num > 0)
return ARGP_ERR_UNKNOWN; /* Leave it for the sub-arg parser. */
printf ("ARG: %s\n", arg);
break;
case 'f':
if (arg)
params->foonly = atoi (arg);
else
params->foonly = params->foonly_default;
popt (key, arg);
break;
case 'p': case 'P': case OPT_PGRP: case 'x': case 'Q':
case 'r': case OPT_SESS: case 'z':
popt (key, arg);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
help_filter (int key, const char *text, void *input)
{
char *new_text;
struct params *params = input;
if (key == ARGP_KEY_HELP_POST_DOC && text)
{
time_t now = time (0);
asprintf (&new_text, text, ctime (&now));
}
else if (key == 'f')
/* Show the default for the --foonly option. */
asprintf (&new_text, "%s (ZOT defaults to %x)",
text, params->foonly_default);
else
new_text = (char *)text;
return new_text;
}
static struct argp_child argp_children[] = { { &sub_argp }, { 0 } };
static struct argp argp = {
options, parse_opt, args_doc, doc, argp_children, help_filter
};
int
main (int argc, char **argv)
{
struct params params;
params.foonly = 0;
params.foonly_default = random ();
argp_parse (&argp, argc, argv, 0, 0, ¶ms);
printf ("After parsing: foonly = %x\n", params.foonly);
return 0;
}
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