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101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Which implementation for busybox
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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extern int which_main(int argc, char **argv)
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{
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char *path_list, *test, *tmp, *path_parsed;
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char buf[PATH_MAX];
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struct stat filestat;
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int count = 0;
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if (argc <= 1 || **(argv + 1) == '-') {
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usage("which [COMMAND ...]\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nLocates a COMMAND.\n"
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#endif
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);
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}
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argc--;
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path_list = getenv("PATH");
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if (!path_list)
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path_list = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin";
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path_parsed = malloc (strlen(path_list) + 1);
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strcpy (path_parsed, path_list);
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/* Replace colons with zeros in path_parsed and count them */
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count = 1;
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test = path_parsed;
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while (1) {
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tmp = strchr(test, ':');
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if (tmp == NULL)
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break;
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*tmp = 0;
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test = tmp + 1;
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count++;
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}
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while(argc-- > 0) {
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int i;
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int found = FALSE;
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test = path_parsed;
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argv++;
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for (i = 0; i < count; i++) {
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strcpy (buf, test);
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strcat (buf, "/");
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strcat (buf, *argv);
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if (stat (buf, &filestat) == 0
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&& filestat.st_mode & S_IXUSR)
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{
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found = TRUE;
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break;
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}
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test += (strlen(test) + 1);
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}
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if (found == TRUE)
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printf ("%s\n", buf);
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else
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{
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printf ("which: no %s in (%s)\n", *argv, path_list);
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exit (FALSE);
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}
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}
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return(TRUE);
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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