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74 lines
1.9 KiB
C
74 lines
1.9 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 <dirent.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;
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struct dirent *next;
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if (**(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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while(argc-- > 0 && *(argv++) != '\0' && strlen(*argv)) {
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for( test=path_list; (tmp=strchr(test, ':')) && (tmp+1)!=NULL; test=++tmp) {
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DIR *dir;
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*tmp='\0';
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//printf("Checking directory '%s'\n", test);
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dir = opendir(test);
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if (!dir)
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continue;
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while ((next = readdir(dir)) != NULL) {
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//printf("Checking file '%s'\n", next->d_name);
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if ((strcmp(next->d_name, *argv) == 0)) {
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printf("%s/%s\n", test, next->d_name);
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exit(TRUE);
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}
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}
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}
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}
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exit(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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