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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) 1999-2003 by Erik Andersen <andersen@codepoet.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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/* getopt not needed */
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "busybox.h"
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static int file_exists(char *file)
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{
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struct stat filestat;
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if (stat(file, &filestat) == 0 &&
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S_ISREG(filestat.st_mode) &&
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filestat.st_mode & S_IXUSR)
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return 1;
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else
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return 0;
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}
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extern int which_main(int argc, char **argv)
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{
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char *path_list, *path_n;
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int i, count=1, found, status = EXIT_SUCCESS;
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if (argc <= 1 || **(argv + 1) == '-')
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bb_show_usage();
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argc--;
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path_list = getenv("PATH");
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if (path_list != NULL) {
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for(i=strlen(path_list); i > 0; i--)
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if (path_list[i]==':') {
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path_list[i]=0;
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count++;
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}
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} else {
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path_list = "/bin\0/sbin\0/usr/bin\0/usr/sbin\0/usr/local/bin";
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count = 5;
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}
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while(argc-- > 0) {
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char *buf;
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path_n = path_list;
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argv++;
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found = 0;
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/*
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* Check if we were given the full path, first.
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* Otherwise see if the file exists in our $PATH.
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*/
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buf = *argv;
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if (file_exists(buf)) {
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puts(buf);
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found = 1;
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} else {
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for (i = 0; i < count; i++) {
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buf = concat_path_file(path_n, *argv);
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if (file_exists(buf)) {
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puts(buf);
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found = 1;
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break;
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}
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free(buf);
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path_n += (strlen(path_n) + 1);
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}
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}
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if (!found)
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status = EXIT_FAILURE;
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}
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return status;
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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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