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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     23 /*	  All Rights Reserved  	*/
     24 
     25 /*
     26  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
     27  * Use is subject to license terms.
     28  */
     29 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     30 
     31 /*
     32  *	accton - calls syscall with super-user privileges
     33  */
     34 
     35 #include <stdio.h>
     36 #include <sys/types.h>
     37 #include <sys/param.h>
     38 #include "acctdef.h"
     39 #include <errno.h>
     40 #include <sys/stat.h>
     41 #include <pwd.h>
     42 #include <fcntl.h>
     43 #include <stdlib.h>
     44 
     45 uid_t	admuid;
     46 struct	passwd *pwd;
     47 
     48 void ckfile(char *);
     49 
     50 int
     51 main(int argc, char **argv)
     52 {
     53 	uid_t	uid;
     54 
     55 	uid = getuid();
     56 	if ((pwd = getpwnam("adm")) == NULL) {
     57 		perror("cannot determine adm's uid"), exit(1);
     58 	}
     59 	admuid = pwd->pw_uid;
     60 	if (uid == ROOT || uid == admuid) {
     61 		if (setuid(ROOT) == ERR) {
     62 			perror("cannot setuid (check command mode and owner)");
     63 			exit(1);
     64 		}
     65 		if (argv[1])
     66 			ckfile(argv[1]);
     67 		if (acct(argc > 1 ? argv[1] : 0) < 0) {
     68 			perror(argv[1]), exit(1);
     69 		}
     70 		exit(0);
     71 
     72 	}
     73 	fprintf(stderr, "%s: permission denied\n", argv[0]);
     74 	exit(1);
     75 }
     76 
     77 void
     78 ckfile(char *admfile)
     79 {
     80 	struct stat		stbuf;
     81 	struct stat	*s = &stbuf;
     82 	int fd;
     83 
     84 	if ((fd = open(admfile, O_RDONLY|O_CREAT, 0644)) == ERR) {
     85 		perror("creat"), exit(1);
     86 	}
     87 
     88 	if (fstat(fd, s) == ERR) {
     89 		perror("fstat");
     90 		exit(1);
     91 	}
     92 
     93 	if (s->st_uid != admuid || s->st_gid != (gid_t)admuid)
     94 		if (fchown(fd, admuid, (gid_t)admuid) == ERR) {
     95 			perror("cannot change owner"), exit(1);
     96 		}
     97 
     98 	/* was if(s->st_mode & 0777 != 0664) */
     99 	if ((s->st_mode & S_IAMB) != S_IRUSR|S_IWUSR|S_IRGRP|S_IWUSR|S_IROTH)
    100 	    if (fchmod(fd, S_IRUSR|S_IWUSR|S_IRGRP|S_IWUSR|S_IROTH) == ERR) {
    101 			perror("cannot chmod"), exit(1);
    102 	    }
    103 
    104 	(void) close(fd);
    105 }
    106