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vipw.c revision 1.1 
      1 /*
      2  * Copyright (c) 1987 Regents of the University of California.
      3  * 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 char copyright[] =
     36 "@(#) Copyright (c) 1987 Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)vipw.c	5.16 (Berkeley) 3/3/91";
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 #include <sys/stat.h>
     46 #include <pwd.h>
     47 #include <stdio.h>
     48 #include <stdlib.h>
     49 #include <string.h>
     50 
     51 char *progname = "vipw";
     52 char *tempname;
     53 
     54 main()
     55 {
     56 	register int pfd, tfd;
     57 	struct stat begin, end;
     58 
     59 	pw_init();
     60 	pfd = pw_lock();
     61 	tfd = pw_tmp();
     62 	copyfile(pfd, tfd);
     63 	(void)close(tfd);
     64 
     65 	for (;;) {
     66 		if (stat(tempname, &begin))
     67 			pw_error(tempname, 1, 1);
     68 		pw_edit(0);
     69 		if (stat(tempname, &end))
     70 			pw_error(tempname, 1, 1);
     71 		if (begin.st_mtime == end.st_mtime) {
     72 			(void)fprintf(stderr, "vipw: no changes made\n");
     73 			pw_error((char *)NULL, 0, 0);
     74 		}
     75 		if (pw_mkdb())
     76 			break;
     77 		pw_prompt();
     78 	}
     79 	exit(0);
     80 }
     81 
     82 copyfile(from, to)
     83 	register int from, to;
     84 {
     85 	register int nr, nw, off;
     86 	char buf[8*1024];
     87 
     88 	while ((nr = read(from, buf, sizeof(buf))) > 0)
     89 		for (off = 0; off < nr; nr -= nw, off += nw)
     90 			if ((nw = write(to, buf + off, nr)) < 0)
     91 				pw_error(tempname, 1, 1);
     92 	if (nr < 0)
     93 		pw_error(_PATH_MASTERPASSWD, 1, 1);
     94 }
     95