2 * Copyright (c) 1996, 1998-2005, 2010
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
24 #include <sys/types.h>
25 #include <sys/param.h>
35 #endif /* STDC_HEADERS */
38 #endif /* HAVE_STRING_H */
41 #endif /* HAVE_STRINGS_H */
44 #endif /* HAVE_UNISTD_H */
49 * This function finds the full pathname for a command and
50 * stores it in a statically allocated array, filling in a pointer
51 * to the array. Returns FOUND if the command was found, NOT_FOUND
52 * if it was not found, or NOT_FOUND_DOT if it would have been found
53 * but it is in '.' and IGNORE_DOT is set.
56 find_path(infile, outfile, sbp, path, ignore_dot)
57 char *infile; /* file to find */
58 char **outfile; /* result parameter */
59 struct stat *sbp; /* stat result parameter */
60 char *path; /* path to search */
61 int ignore_dot; /* don't check cwd */
63 static char command[PATH_MAX]; /* qualified filename */
64 char *n; /* for traversing path */
65 char *origpath; /* so we can free path later */
66 char *result = NULL; /* result of path/file lookup */
67 int checkdot = 0; /* check current dir? */
68 int len; /* length parameter */
70 if (strlen(infile) >= PATH_MAX)
71 errorx(1, "%s: File name too long", infile);
74 * If we were given a fully qualified or relative path
75 * there is no need to look at $PATH.
77 if (strchr(infile, '/')) {
78 strlcpy(command, infile, sizeof(command)); /* paranoia */
79 if (sudo_goodpath(command, sbp)) {
92 if ((n = strchr(path, ':')))
96 * Search current dir last if it is in PATH This will miss sneaky
97 * things like using './' or './/'
99 if (*path == '\0' || (*path == '.' && *(path + 1) == '\0')) {
106 * Resolve the path and exit the loop if found.
108 len = snprintf(command, sizeof(command), "%s/%s", path, infile);
109 if (len <= 0 || len >= sizeof(command))
110 errorx(1, "%s: File name too long", infile);
111 if ((result = sudo_goodpath(command, sbp)))
120 * Check current dir if dot was in the PATH
122 if (!result && checkdot) {
123 len = snprintf(command, sizeof(command), "./%s", infile);
124 if (len <= 0 || len >= sizeof(command))
125 errorx(1, "%s: File name too long", infile);
126 result = sudo_goodpath(command, sbp);
127 if (result && ignore_dot)
128 return(NOT_FOUND_DOT);