/* * Copyright (c) 1996, 1998, 1999, 2001 * Todd C. Miller <Todd.Miller@courtesan.com>. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 4. Products derived from this software may not be called "Sudo" nor * may "Sudo" appear in their names without specific prior written * permission from the author. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #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 static const char rcsid[] = "$Sudo: goodpath.c,v 1.38 2001/12/14 19:52:47 millert Exp $"; #endif /* lint */ /* * Verify that path is a normal file and executable by root. */ char * sudo_goodpath(path) const char *path; { 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); } return((char *)path); }