Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 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 <dirent.h> |
| 27 | |
| 28 | |
| 29 | extern int which_main(int argc, char **argv) |
| 30 | { |
| 31 | char *path_list, *test, *tmp; |
| 32 | struct dirent *next; |
| 33 | |
| 34 | if (**(argv + 1) == '-') { |
| 35 | usage("which [COMMAND ...]\n" |
| 36 | #ifndef BB_FEATURE_TRIVIAL_HELP |
| 37 | "\nLocates a COMMAND.\n" |
| 38 | #endif |
| 39 | ); |
| 40 | } |
| 41 | argc--; |
| 42 | |
| 43 | path_list = getenv("PATH"); |
| 44 | if (!path_list) |
| 45 | path_list = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin"; |
| 46 | |
| 47 | while(argc-- > 0 && *(argv++) != '\0' && strlen(*argv)) { |
| 48 | for( test=path_list; (tmp=strchr(test, ':')) && (tmp+1)!=NULL; test=++tmp) { |
| 49 | DIR *dir; |
| 50 | *tmp='\0'; |
| 51 | //printf("Checking directory '%s'\n", test); |
| 52 | dir = opendir(test); |
| 53 | if (!dir) |
| 54 | continue; |
| 55 | while ((next = readdir(dir)) != NULL) { |
| 56 | //printf("Checking file '%s'\n", next->d_name); |
| 57 | if ((strcmp(next->d_name, *argv) == 0)) { |
| 58 | printf("%s/%s\n", test, next->d_name); |
| 59 | exit(TRUE); |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | exit(TRUE); |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | Local Variables: |
| 69 | c-file-style: "linux" |
| 70 | c-basic-offset: 4 |
| 71 | tab-width: 4 |
| 72 | End: |
| 73 | */ |