30fe4a067c
Set adminstrative domain for the process when looking up user's
password or group info and when preparing for execve().
Include strings.h even if string.h exists since they may define
different things. Fixes warnings on AIX and others.
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* Copyright (c) 1996, 1998-2005, 2010
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* Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include "sudoers.h"
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/*
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* This function finds the full pathname for a command and
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* stores it in a statically allocated array, filling in a pointer
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* to the array. Returns FOUND if the command was found, NOT_FOUND
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* if it was not found, or NOT_FOUND_DOT if it would have been found
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* but it is in '.' and IGNORE_DOT is set.
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*/
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int
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find_path(char *infile, char **outfile, struct stat *sbp, char *path,
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int ignore_dot)
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{
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static char command[PATH_MAX]; /* qualified filename */
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char *n; /* for traversing path */
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char *origpath; /* so we can free path later */
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char *result = NULL; /* result of path/file lookup */
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int checkdot = 0; /* check current dir? */
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int len; /* length parameter */
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if (strlen(infile) >= PATH_MAX)
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errorx(1, "%s: File name too long", infile);
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/*
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* If we were given a fully qualified or relative path
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* there is no need to look at $PATH.
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*/
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if (strchr(infile, '/')) {
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strlcpy(command, infile, sizeof(command)); /* paranoia */
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if (sudo_goodpath(command, sbp)) {
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*outfile = command;
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return(FOUND);
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} else
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return(NOT_FOUND);
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}
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if (path == NULL)
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return(NOT_FOUND);
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path = estrdup(path);
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origpath = path;
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do {
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if ((n = strchr(path, ':')))
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*n = '\0';
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/*
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* Search current dir last if it is in PATH This will miss sneaky
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* things like using './' or './/'
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*/
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if (*path == '\0' || (*path == '.' && *(path + 1) == '\0')) {
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checkdot = 1;
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path = n + 1;
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continue;
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}
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/*
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* Resolve the path and exit the loop if found.
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*/
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len = snprintf(command, sizeof(command), "%s/%s", path, infile);
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if (len <= 0 || len >= sizeof(command))
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errorx(1, "%s: File name too long", infile);
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if ((result = sudo_goodpath(command, sbp)))
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break;
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path = n + 1;
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} while (n);
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efree(origpath);
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/*
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* Check current dir if dot was in the PATH
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*/
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if (!result && checkdot) {
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len = snprintf(command, sizeof(command), "./%s", infile);
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if (len <= 0 || len >= sizeof(command))
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errorx(1, "%s: File name too long", infile);
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result = sudo_goodpath(command, sbp);
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if (result && ignore_dot)
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return(NOT_FOUND_DOT);
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}
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if (result) {
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*outfile = result;
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return(FOUND);
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} else
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return(NOT_FOUND);
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}
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