1 /* $NetBSD: vipw.c,v 1.6 1998/12/09 12:40:15 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)vipw.c 8.3 (Berkeley) 4/2/94"; 45 #else 46 __RCSID("$NetBSD: vipw.c,v 1.6 1998/12/09 12:40:15 christos Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/types.h> 51 #include <sys/stat.h> 52 53 #include <err.h> 54 #include <pwd.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <fcntl.h> 60 #include <errno.h> 61 #include <util.h> 62 63 int main __P((int, char **)); 64 static void copyfile __P((int, int)); 65 static void usage __P((void)); 66 67 int 68 main(argc, argv) 69 int argc; 70 char *argv[]; 71 { 72 int pfd, tfd; 73 struct stat begin, end; 74 int ch; 75 76 while ((ch = getopt(argc, argv, "")) != -1) { 77 switch (ch) { 78 case '?': 79 default: 80 usage(); 81 } 82 } 83 argc -= optind; 84 argv += optind; 85 86 if (argc != 0) 87 usage(); 88 89 pw_init(); 90 tfd = pw_lock(0); 91 if (tfd < 0) { 92 if (errno == EEXIST) 93 errx(1, "the passwd file is busy."); 94 else 95 err(1, "%s", _PATH_MASTERPASSWD_LOCK); 96 } 97 98 pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0); 99 if (pfd < 0) 100 pw_error(_PATH_MASTERPASSWD, 1, 1); 101 copyfile(pfd, tfd); 102 (void)close(tfd); 103 104 for (;;) { 105 if (stat(_PATH_MASTERPASSWD_LOCK, &begin)) 106 pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1); 107 pw_edit(0, NULL); 108 if (stat(_PATH_MASTERPASSWD_LOCK, &end)) 109 pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1); 110 if (begin.st_mtime == end.st_mtime) { 111 warnx("no changes made"); 112 pw_error((char *)NULL, 0, 0); 113 } 114 if (pw_mkdb() == 0) 115 break; 116 pw_prompt(); 117 } 118 return 0; 119 } 120 121 static void 122 copyfile(from, to) 123 int from, to; 124 { 125 int nr, nw, off; 126 char buf[8*1024]; 127 128 while ((nr = read(from, buf, sizeof(buf))) > 0) 129 for (off = 0; off < nr; nr -= nw, off += nw) 130 if ((nw = write(to, buf + off, nr)) < 0) 131 pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1); 132 if (nr < 0) 133 pw_error(_PATH_MASTERPASSWD, 1, 1); 134 } 135 136 static void 137 usage() 138 { 139 extern char *__progname; 140 141 (void)fprintf(stderr, "Usage: %s\n", __progname); 142 exit(1); 143 } 144