Last change
on this file since 1931 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
1.4 KB
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Utility routines.
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4 | *
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5 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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8 | */
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9 |
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10 | #include "libbb.h"
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11 |
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12 | /* check if path points to an executable file;
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13 | * return 1 if found;
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14 | * return 0 otherwise;
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15 | */
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16 | int execable_file(const char *name)
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17 | {
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18 | struct stat s;
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19 | return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
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20 | }
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21 |
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22 | /* search $PATH for an executable file;
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23 | * return allocated string containing full path if found;
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24 | * return NULL otherwise;
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25 | */
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26 | char *find_execable(const char *filename)
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27 | {
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28 | char *path, *p, *n;
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29 |
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30 | p = path = xstrdup(getenv("PATH"));
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31 | while (p) {
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32 | n = strchr(p, ':');
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33 | if (n)
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34 | *n++ = '\0';
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35 | if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
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36 | p = concat_path_file(p, filename);
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37 | if (execable_file(p)) {
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38 | free(path);
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39 | return p;
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40 | }
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41 | free(p);
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42 | }
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43 | p = n;
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44 | }
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45 | free(path);
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46 | return NULL;
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47 | }
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48 |
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49 | /* search $PATH for an executable file;
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50 | * return 1 if found;
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51 | * return 0 otherwise;
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52 | */
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53 | int exists_execable(const char *filename)
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54 | {
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55 | char *ret = find_execable(filename);
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56 | if (ret) {
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57 | free(ret);
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58 | return 1;
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59 | }
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60 | return 0;
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61 | }
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62 |
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63 | #if ENABLE_FEATURE_PREFER_APPLETS
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64 | /* just like the real execvp, but try to launch an applet named 'file' first
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65 | */
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66 | int bb_execvp(const char *file, char *const argv[])
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67 | {
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68 | return execvp(find_applet_by_name(file) ? bb_busybox_exec_path : file,
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69 | argv);
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70 | }
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71 | #endif
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