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+/* Test program for argp argument parser
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Written by Miles Bader <miles at gnu.ai.mit.edu>.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#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[10];
+ 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, &params);
+ printf ("After parsing: foonly = %x\n", params.foonly);
+ return 0;
+}