1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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4 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
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5 | *
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6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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7 | */
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8 | //config:config WHICH
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9 | //config: bool "which"
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10 | //config: default y
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11 | //config: help
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12 | //config: which is used to find programs in your PATH and
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13 | //config: print out their pathnames.
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14 |
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15 | //applet:IF_WHICH(APPLET(which, BB_DIR_USR_BIN, BB_SUID_DROP))
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16 |
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17 | //kbuild:lib-$(CONFIG_WHICH) += which.o
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18 |
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19 | //usage:#define which_trivial_usage
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20 | //usage: "[COMMAND]..."
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21 | //usage:#define which_full_usage "\n\n"
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22 | //usage: "Locate a COMMAND"
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23 | //usage:
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24 | //usage:#define which_example_usage
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25 | //usage: "$ which login\n"
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26 | //usage: "/bin/login\n"
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27 |
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28 | #include "libbb.h"
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29 |
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30 | int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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31 | int which_main(int argc UNUSED_PARAM, char **argv)
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32 | {
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33 | const char *env_path;
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34 | int status = 0;
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35 |
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36 | env_path = getenv("PATH");
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37 | if (!env_path)
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38 | env_path = bb_default_root_path;
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39 |
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40 | opt_complementary = "-1"; /* at least one argument */
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41 | getopt32(argv, "a");
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42 | argv += optind;
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43 |
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44 | do {
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45 | int missing = 1;
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46 |
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47 | /* If file contains a slash don't use PATH */
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48 | if (strchr(*argv, '/')) {
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49 | if (file_is_executable(*argv)) {
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50 | missing = 0;
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51 | puts(*argv);
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52 | }
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53 | } else {
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54 | char *path;
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55 | char *tmp;
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56 | char *p;
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57 |
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58 | path = tmp = xstrdup(env_path);
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59 | while ((p = find_executable(*argv, &tmp)) != NULL) {
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60 | missing = 0;
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61 | puts(p);
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62 | free(p);
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63 | if (!option_mask32) /* -a not set */
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64 | break;
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65 | }
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66 | free(path);
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67 | }
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68 | status |= missing;
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69 | } while (*++argv);
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70 |
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71 | return status;
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72 | }
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