Mercurial > hg > toybox
annotate toys/which.c @ 194:30a6db5a95c2
Add comments about SUSv3 specs (or lack thereof).
author | Rob Landley <rob@landley.net> |
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date | Mon, 03 Dec 2007 20:05:57 -0600 |
parents | 25447caf1b4b |
children | d4176f3f3835 |
rev | line source |
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Implement which. Add hello world to menuconfig. Wrap the various applet main
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1 /* vi: set sw=4 ts=4: */ |
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2 /* |
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Add or correct file descriptions
Charlie Shepherd <masterdriverz@gentoo.org>
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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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Add comments about SUSv3 specs (or lack thereof).
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6 * |
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7 * Not in SUSv3. |
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8 */ |
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9 |
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10 #include "toys.h" |
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11 |
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12 #define OPT_a 1 |
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13 |
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14 // Find an exectuable file either at a path with a slash in it (absolute or |
3981c96f9285
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15 // relative to current directory), or in $PATH. Returns absolute path to file, |
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16 // or NULL if not found. |
3981c96f9285
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17 |
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18 static int which_in_path(char *filename) |
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19 { |
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20 struct string_list *list; |
3981c96f9285
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21 |
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22 // If they gave us a path, don't worry about $PATH or -a |
3981c96f9285
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23 |
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24 if (index(filename, '/')) { |
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25 // Confirm it has the executable bit set, and it's not a directory. |
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26 if (!access(filename, X_OK)) { |
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27 struct stat st; |
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28 |
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29 if (!stat(filename, &st) && S_ISREG(st.st_mode)) { |
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30 puts(filename); |
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31 return 0; |
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32 } |
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33 return 1; |
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34 } |
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35 } |
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36 |
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37 // Search $PATH for matches. |
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38 list = find_in_path(getenv("PATH"), filename); |
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39 if (!list) return 1; |
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40 |
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41 // Print out matches |
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42 while (list) { |
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43 if (!access(list->str, X_OK)) { |
3981c96f9285
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44 puts(list->str); |
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45 // If we should stop at one match, do so |
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46 if (toys.optflags & OPT_a) { |
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47 llist_free(list, NULL); |
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48 break; |
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49 } |
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50 } |
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51 free(llist_pop(&list)); |
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52 } |
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53 |
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54 return 0; |
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55 } |
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56 |
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57 void which_main(void) |
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58 { |
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59 if (!*toys.optargs) toys.exitval++; |
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60 else { |
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61 int i; |
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62 for (i=0; toys.optargs[i]; i++) |
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63 toys.exitval |= which_in_path(toys.optargs[i]); |
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64 } |
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65 } |