Don't use strings directly in calls to usage(). This is in preparation
[oweals/busybox.git] / findutils / which.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * Which implementation for busybox
4  *
5  * Copyright (C) 2000 by Lineo, inc.
6  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  *
22  */
23
24 #include "internal.h"
25 #include <stdio.h>
26 #include <sys/stat.h>
27 #include <sys/param.h>
28
29 const char which_usage[] =
30         "which [COMMAND ...]\n"
31 #ifndef BB_FEATURE_TRIVIAL_HELP
32         "\nLocates a COMMAND.\n"
33 #endif
34         ;
35
36 extern int which_main(int argc, char **argv)
37 {
38         char *path_list, *test, *tmp, *path_parsed;
39         char buf[PATH_MAX];
40         struct stat filestat;
41         int count = 0;
42
43         if (argc <= 1 || **(argv + 1) == '-')
44                 usage(which_usage);
45         argc--;
46
47         path_list = getenv("PATH");
48         if (!path_list)
49                 path_list = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin";
50
51         path_parsed = malloc (strlen(path_list) + 1);
52         strcpy (path_parsed, path_list);
53
54         /* Replace colons with zeros in path_parsed and count them */
55         count = 1;
56         test = path_parsed;
57         while (1) {
58                 tmp = strchr(test, ':');
59                 if (tmp == NULL)
60                         break;
61                 *tmp = 0;
62                 test = tmp + 1;
63                 count++;
64         }
65
66
67         while(argc-- > 0) { 
68                 int i;
69                 int found = FALSE;
70                 test = path_parsed;
71                 argv++;
72                 for (i = 0; i < count; i++) {
73                         strcpy (buf, test);
74                         strcat (buf, "/");
75                         strcat (buf, *argv);
76                         if (stat (buf, &filestat) == 0
77                             && filestat.st_mode & S_IXUSR)
78                         {
79                                 found = TRUE;
80                                 break;
81                         }
82                         test += (strlen(test) + 1);
83                 }
84                 if (found == TRUE)
85                         printf ("%s\n", buf);
86                 else
87                 {
88                         printf ("which: no %s in (%s)\n", *argv, path_list);
89                         exit (FALSE);
90                 }
91         }
92         return(TRUE);
93 }
94
95 /*
96 Local Variables:
97 c-file-style: "linux"
98 c-basic-offset: 4
99 tab-width: 4
100 End:
101 */