/* * Copyright (c) 1996, 1998-2005 Todd C. Miller <Todd.Miller@courtesan.com> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F39502-99-1-0512. */ #include <config.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/param.h> #include <stdio.h> #ifdef HAVE_STRING_H # include <string.h> #else # ifdef HAVE_STRINGS_H # include <strings.h> # endif #endif /* HAVE_STRING_H */ #ifdef HAVE_UNISTD_H # include <unistd.h> #endif /* HAVE_UNISTD_H */ #include <errno.h> #include "sudo.h" #ifndef lint __unused static const char rcsid[] = "$Sudo: goodpath.c,v 1.44 2005/02/12 22:56:06 millert Exp $"; #endif /* lint */ /* * Verify that path is a normal file and executable by root. */ char * sudo_goodpath(path, sbp) const char *path; struct stat *sbp; { struct stat sb; /* Check for brain damage */ if (path == NULL || path[0] == '\0') return(NULL); if (stat(path, &sb)) return(NULL); /* Make sure path describes an executable regular file. */ if (!S_ISREG(sb.st_mode) || !(sb.st_mode & 0000111)) { errno = EACCES; return(NULL); } if (sbp != NULL) (void) memcpy(sbp, &sb, sizeof(struct stat)); return((char *)path); }