275c2fc980
gain us anything to run as the user since an attacker can just have an setuid(0) in their egg. Running as root solves potential problems wrt signalling.
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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* Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <stdio.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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#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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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include "sudo.h"
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#ifndef STDC_HEADERS
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extern int stat __P((const char *, struct stat *));
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#endif /* !STDC_HEADERS */
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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/*
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* Verify that path is a normal file and executable by root.
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*/
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char *
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sudo_goodpath(path)
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const char *path;
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{
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struct stat sb;
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/* Check for brain damage */
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if (path == NULL || path[0] == '\0')
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return(NULL);
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if (stat(path, &sb))
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return(NULL);
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/* Make sure path describes an executable regular file. */
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if (!S_ISREG(sb.st_mode) || !(sb.st_mode & 0000111)) {
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errno = EACCES;
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return(NULL);
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}
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return((char *)path);
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}
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