busybox/debianutils/which.c

/* vi: set sw=4 ts=4: */
/*
 * Which implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
 *
 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 *
 * Based on which from debianutils
 */

#include "libbb.h"

int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int which_main(int argc UNUSED_PARAM, char **argv)
{
	IF_DESKTOP(int opt;)
	int status = EXIT_SUCCESS;
	char *path;
	char *p;

	opt_complementary = "-1"; /* at least one argument */
	IF_DESKTOP(opt =) getopt32(argv, "a");
	argv += optind;

	/* This matches what is seen on e.g. ubuntu.
	 * "which" there is a shell script. */
	path = getenv("PATH");
	if (!path) {
		path = (char*)bb_PATH_root_path;
		putenv(path);
		path += 5; /* skip "PATH=" */
	}

	do {
#if ENABLE_DESKTOP
/* Much bloat just to support -a */
		if (strchr(*argv, '/')) {
			if (execable_file(*argv)) {
				puts(*argv);
				continue;
			}
			status = EXIT_FAILURE;
		} else {
			char *path2 = xstrdup(path);
			char *tmp = path2;

			p = find_execable(*argv, &tmp);
			if (!p)
				status = EXIT_FAILURE;
			else {
 print:
				puts(p);
				free(p);
				if (opt) {
					/* -a: show matches in all PATH components */
					if (tmp) {
						p = find_execable(*argv, &tmp);
						if (p)
							goto print;
					}
				}
			}
			free(path2);
		}
#else
/* Just ignoring -a */
		if (strchr(*argv, '/')) {
			if (execable_file(*argv)) {
				puts(*argv);
				continue;
			}
		} else {
			char *path2 = xstrdup(path);
			char *tmp = path2;
			p = find_execable(*argv, &tmp);
			free(path2);
			if (p) {
				puts(p);
				free(p);
				continue;
			}
		}
		status = EXIT_FAILURE;
#endif
	} while (*(++argv) != NULL);

	fflush_stdout_and_exit(status);
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Which implementation for busybox
4	*
5	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6	* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
7	*
8	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
9	*
10	* Based on which from debianutils
11	*/
12
13	#include "libbb.h"
14
15	int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
16	int which_main(int argc UNUSED_PARAM, char **argv)
17	{
18	IF_DESKTOP(int opt;)
19	int status = EXIT_SUCCESS;
20	char *path;
21	char *p;
22
23	opt_complementary = "-1"; /* at least one argument */
24	IF_DESKTOP(opt =) getopt32(argv, "a");
25	argv += optind;
26
27	/* This matches what is seen on e.g. ubuntu.
28	* "which" there is a shell script. */
29	path = getenv("PATH");
30	if (!path) {
31	path = (char*)bb_PATH_root_path;
32	putenv(path);
33	path += 5; /* skip "PATH=" */
34	}
35
36	do {
37	#if ENABLE_DESKTOP
38	/* Much bloat just to support -a */
39	if (strchr(*argv, '/')) {
40	if (execable_file(*argv)) {
41	puts(*argv);
42	continue;
43	}
44	status = EXIT_FAILURE;
45	} else {
46	char *path2 = xstrdup(path);
47	char *tmp = path2;
48
49	p = find_execable(*argv, &tmp);
50	if (!p)
51	status = EXIT_FAILURE;
52	else {
53	print:
54	puts(p);
55	free(p);
56	if (opt) {
57	/* -a: show matches in all PATH components */
58	if (tmp) {
59	p = find_execable(*argv, &tmp);
60	if (p)
61	goto print;
62	}
63	}
64	}
65	free(path2);
66	}
67	#else
68	/* Just ignoring -a */
69	if (strchr(*argv, '/')) {
70	if (execable_file(*argv)) {
71	puts(*argv);
72	continue;
73	}
74	} else {
75	char *path2 = xstrdup(path);
76	char *tmp = path2;
77	p = find_execable(*argv, &tmp);
78	free(path2);
79	if (p) {
80	puts(p);
81	free(p);
82	continue;
83	}
84	}
85	status = EXIT_FAILURE;
86	#endif
87	} while (*(++argv) != NULL);
88
89	fflush_stdout_and_exit(status);
90	}