1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) tons of folks.  Tracking down who wrote what
6 * isn't something I'm going to worry about...  If you wrote something
7 * here, please feel free to acknowledge your work.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
24 * Permission has been granted to redistribute this code under the GPL.
25 *
26 */
27
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31#include "busybox.h"
32
33#undef APPLET
34#undef APPLET_NOUSAGE
35#undef PROTOTYPES
36#include "applets.h"
37
38struct BB_applet *applet_using;
39
40/* The -1 arises because of the {0,NULL,0,-1} entry above. */
41const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);
42
43extern void show_usage(void)
44{
45	const char *format_string;
46	const char *usage_string = usage_messages;
47	int i;
48	/* From busybox.c */
49	extern int been_there_done_that;
50
51	if (strcmp(applet_using->name, "busybox")==0) {
52		been_there_done_that=1;
53		busybox_main(0, NULL);
54	}
55
56	for (i = applet_using - applets; i > 0; ) {
57		if (!*usage_string++) {
58			--i;
59		}
60	}
61	format_string = "%s\n\nUsage: %s %s\n\n";
62	if(*usage_string == 0)
63		format_string = "%s\n\nNo help available.\n\n";
64	fprintf(stderr, format_string,
65			full_version, applet_using->name, usage_string);
66	exit(EXIT_FAILURE);
67}
68
69static int applet_name_compare(const void *x, const void *y)
70{
71	const char *name = x;
72	const struct BB_applet *applet = y;
73
74	return strcmp(name, applet->name);
75}
76
77extern const size_t NUM_APPLETS;
78
79struct BB_applet *find_applet_by_name(const char *name)
80{
81	return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
82			applet_name_compare);
83}
84
85void run_applet_by_name(const char *name, int argc, char **argv)
86{
87	static int recurse_level = 0;
88
89	recurse_level++;
90	/* Do a binary search to find the applet entry given the name. */
91	if ((applet_using = find_applet_by_name(name)) != NULL) {
92		applet_name = applet_using->name;
93		if (argv[1] && strcmp(argv[1], "--help") == 0) {
94			show_usage();
95		}
96		exit((*(applet_using->main)) (argc, argv));
97	}
98	/* Just in case they have renamed busybox - Check argv[1] */
99	if (recurse_level == 1) {
100		run_applet_by_name("busybox", argc, argv);
101	}
102	recurse_level = 0;
103}
104
105
106/* END CODE */
107/*
108Local Variables:
109c-file-style: "linux"
110c-basic-offset: 4
111tab-width: 4
112End:
113*/
114