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vipw.c revision 1.1.1.2 
      1 /*
      2  * Copyright (c) 1987, 1993, 1994
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char copyright[] =
     36 "@(#) Copyright (c) 1987, 1993, 1994\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 #include <sys/stat.h>
     46 
     47 #include <err.h>
     48 #include <pwd.h>
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <unistd.h>
     53 
     54 #include "pw_util.h"
     55 
     56 char *tempname;
     57 
     58 void	copyfile __P((int, int));
     59 void	usage __P((void));
     60 
     61 int
     62 main(argc, argv)
     63 	int argc;
     64 	char *argv[];
     65 {
     66 	int pfd, tfd;
     67 	struct stat begin, end;
     68 	int ch;
     69 
     70 	while ((ch = getopt(argc, argv, "")) != EOF)
     71 		switch (ch) {
     72 		case '?':
     73 		default:
     74 			usage();
     75 		}
     76 
     77 	argc -= optind;
     78 	argv += optind;
     79 
     80 	if (argc != 0)
     81 		usage();
     82 
     83 	pw_init();
     84 	pfd = pw_lock();
     85 	tfd = pw_tmp();
     86 	copyfile(pfd, tfd);
     87 	(void)close(tfd);
     88 
     89 	for (;;) {
     90 		if (stat(tempname, &begin))
     91 			pw_error(tempname, 1, 1);
     92 		pw_edit(0);
     93 		if (stat(tempname, &end))
     94 			pw_error(tempname, 1, 1);
     95 		if (begin.st_mtime == end.st_mtime) {
     96 			warnx("no changes made");
     97 			pw_error((char *)NULL, 0, 0);
     98 		}
     99 		if (pw_mkdb())
    100 			break;
    101 		pw_prompt();
    102 	}
    103 	exit(0);
    104 }
    105 
    106 void
    107 copyfile(from, to)
    108 	int from, to;
    109 {
    110 	int nr, nw, off;
    111 	char buf[8*1024];
    112 
    113 	while ((nr = read(from, buf, sizeof(buf))) > 0)
    114 		for (off = 0; off < nr; nr -= nw, off += nw)
    115 			if ((nw = write(to, buf + off, nr)) < 0)
    116 				pw_error(tempname, 1, 1);
    117 	if (nr < 0)
    118 		pw_error(_PATH_MASTERPASSWD, 1, 1);
    119 }
    120 
    121 void
    122 usage()
    123 {
    124 
    125 	(void)fprintf(stderr, "usage: vipw\n");
    126 	exit(1);
    127 }
    128