| File: | src/usr.sbin/vipw/vipw.c |
| Warning: | line 61, column 2 Value stored to 'argv' is never read |
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| 1 | /* $OpenBSD: vipw.c,v 1.26 2021/10/24 21:24:19 deraadt 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. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/time.h> |
| 33 | #include <sys/stat.h> |
| 34 | |
| 35 | #include <err.h> |
| 36 | #include <fcntl.h> |
| 37 | #include <paths.h> |
| 38 | #include <pwd.h> |
| 39 | #include <stdio.h> |
| 40 | #include <stdlib.h> |
| 41 | #include <unistd.h> |
| 42 | #include <util.h> |
| 43 | |
| 44 | void copyfile(int, int, struct stat *); |
| 45 | __dead__attribute__((__noreturn__)) void usage(void); |
| 46 | |
| 47 | int |
| 48 | main(int argc, char *argv[]) |
| 49 | { |
| 50 | int pfd, tfd; |
| 51 | struct stat begin, end; |
| 52 | int ch; |
| 53 | |
| 54 | while ((ch = getopt(argc, argv, "")) != -1) { |
| 55 | switch (ch) { |
| 56 | default: |
| 57 | usage(); |
| 58 | } |
| 59 | } |
| 60 | argc -= optind; |
| 61 | argv += optind; |
Value stored to 'argv' is never read | |
| 62 | |
| 63 | if (argc != 0) |
| 64 | usage(); |
| 65 | |
| 66 | if (unveil(_PATH_MASTERPASSWD_LOCK"/etc/ptmp", "rwc") == -1) |
| 67 | err(1, "unveil %s", _PATH_MASTERPASSWD_LOCK"/etc/ptmp"); |
| 68 | if (unveil(_PATH_MASTERPASSWD"/etc/master.passwd", "r") == -1) |
| 69 | err(1, "unveil %s", _PATH_MASTERPASSWD"/etc/master.passwd"); |
| 70 | if (unveil(_PATH_BSHELL"/bin/sh", "x") == -1) |
| 71 | err(1, "unveil %s", _PATH_BSHELL"/bin/sh"); |
| 72 | if (unveil(_PATH_PWD_MKDB"/usr/sbin/pwd_mkdb", "x") == -1) |
| 73 | err(1, "unveil %s", _PATH_PWD_MKDB"/usr/sbin/pwd_mkdb"); |
| 74 | if (pledge("stdio rpath wpath cpath fattr proc exec", NULL((void *)0)) == -1) |
| 75 | err(1, "pledge"); |
| 76 | |
| 77 | pw_init(); |
| 78 | tfd = pw_lock(0); |
| 79 | if (tfd == -1) |
| 80 | errx(1, "the passwd file is busy or you cannot lock."); |
| 81 | pfd = open(_PATH_MASTERPASSWD"/etc/master.passwd", O_RDONLY0x0000); |
| 82 | if (pfd == -1) |
| 83 | pw_error(_PATH_MASTERPASSWD"/etc/master.passwd", 1, 1); |
| 84 | copyfile(pfd, tfd, &begin); |
| 85 | (void)close(tfd); |
| 86 | |
| 87 | for (;;) { |
| 88 | pw_edit(0, NULL((void *)0)); |
| 89 | if (stat(_PATH_MASTERPASSWD_LOCK"/etc/ptmp", &end)) |
| 90 | pw_error(_PATH_MASTERPASSWD_LOCK"/etc/ptmp", 1, 1); |
| 91 | if (timespeccmp(&begin.st_mtimespec, &end.st_mtimespec, ==)(((&begin.st_mtim)->tv_sec == (&end.st_mtim)->tv_sec ) ? ((&begin.st_mtim)->tv_nsec == (&end.st_mtim)-> tv_nsec) : ((&begin.st_mtim)->tv_sec == (&end.st_mtim )->tv_sec)) && |
| 92 | begin.st_size == end.st_size) { |
| 93 | warnx("no changes made"); |
| 94 | pw_error((char *)NULL((void *)0), 0, 0); |
| 95 | } |
| 96 | if (pw_mkdb(NULL((void *)0), 0) == 0) |
| 97 | break; |
| 98 | pw_prompt(); |
| 99 | } |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | copyfile(int from, int to, struct stat *sb) |
| 106 | { |
| 107 | int nr, nw, off; |
| 108 | char buf[8*1024]; |
| 109 | struct timespec ts[2]; |
| 110 | |
| 111 | if (fstat(from, sb) == -1) |
| 112 | pw_error(_PATH_MASTERPASSWD"/etc/master.passwd", 1, 1); |
| 113 | while ((nr = read(from, buf, sizeof(buf))) > 0) |
| 114 | for (off = 0; nr > 0; nr -= nw, off += nw) |
| 115 | if ((nw = write(to, buf + off, nr)) == -1) |
| 116 | pw_error(_PATH_MASTERPASSWD_LOCK"/etc/ptmp", 1, 1); |
| 117 | if (nr == -1) |
| 118 | pw_error(_PATH_MASTERPASSWD"/etc/master.passwd", 1, 1); |
| 119 | |
| 120 | ts[0] = sb->st_atim; |
| 121 | ts[1] = sb->st_mtim; |
| 122 | (void)futimens(to, ts); |
| 123 | } |
| 124 | |
| 125 | __dead__attribute__((__noreturn__)) void |
| 126 | usage(void) |
| 127 | { |
| 128 | extern char *__progname; |
| 129 | |
| 130 | (void)fprintf(stderr(&__sF[2]), "usage: %s\n", __progname); |
| 131 | exit(1); |
| 132 | } |