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annotate toys/other/which.c @ 656:6df4ccc0acbe

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Regularize command headers, update links to standards documents.
author Rob Landley <rob@landley.net>
date Sat, 25 Aug 2012 18:08:51 -0500
parents 2986aa63a021
children 786841fdb1e0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * which.c - Find executable files in $PATH.
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4 *
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5 * Copyright 2006 Rob landley <rob@landley.net>
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6
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7 USE_WHICH(NEWTOY(which, "<1a", TOYFLAG_USR|TOYFLAG_BIN))
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8
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9 config WHICH
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10 bool "which"
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11 default y
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12 help
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13 usage: which [-a] filename ...
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d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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15 Search $PATH for executable files matching filename(s).
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16
d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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17 -a Show all matches
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18 */
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19 #include "toys.h"
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21 // Find an exectuable file either at a path with a slash in it (absolute or
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22 // relative to current directory), or in $PATH. Returns absolute path to file,
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23 // or NULL if not found.
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24
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25 static int which_in_path(char *filename)
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26 {
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27 struct string_list *list;
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29 // If they gave us a path, don't worry about $PATH or -a
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30
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d51be130fda2 More stabs at getting #includes right, and moving off of deprecated functions.
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31 if (strchr(filename, '/')) {
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32 // Confirm it has the executable bit set, and it's not a directory.
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33 if (!access(filename, X_OK)) {
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34 struct stat st;
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36 if (!stat(filename, &st) && S_ISREG(st.st_mode)) {
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37 puts(filename);
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38 return 0;
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39 }
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40 return 1;
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41 }
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42 }
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43
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44 // Search $PATH for matches.
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45 list = find_in_path(getenv("PATH"), filename);
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46 if (!list) return 1;
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47
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48 // Print out matches
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49 while (list) {
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50 if (!access(list->str, X_OK)) {
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51 puts(list->str);
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52 // If we should stop at one match, do so
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53 if (!toys.optflags) {
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54 llist_traverse(list, free);
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55 break;
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56 }
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57 }
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58 free(llist_pop(&list));
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59 }
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60
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61 return 0;
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62 }
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63
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25447caf1b4b Change command main() functions to return void, and exit(toys.exitval) from
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64 void which_main(void)
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65 {
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66 int i;
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67 for (i=0; toys.optargs[i]; i++)
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68 toys.exitval |= which_in_path(toys.optargs[i]);
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69 }