| File: | src/usr.sbin/dev_mkdb/dev_mkdb.c |
| Warning: | line 83, column 2 Value stored to 'argv' is never read |
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| 1 | /* $OpenBSD: dev_mkdb.c,v 1.18 2021/07/12 15:09:20 beck Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1990, 1993 |
| 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/stat.h> |
| 33 | |
| 34 | #include <db.h> |
| 35 | #include <dirent.h> |
| 36 | #include <err.h> |
| 37 | #include <errno(*__errno()).h> |
| 38 | #include <fcntl.h> |
| 39 | #include <paths.h> |
| 40 | #include <stdio.h> |
| 41 | #include <stdlib.h> |
| 42 | #include <string.h> |
| 43 | #include <unistd.h> |
| 44 | |
| 45 | void usage(void); |
| 46 | |
| 47 | int |
| 48 | main(int argc, char *argv[]) |
| 49 | { |
| 50 | DIR *dirp; |
| 51 | struct dirent *dp; |
| 52 | struct stat sb; |
| 53 | struct { |
| 54 | mode_t type; |
| 55 | dev_t dev; |
| 56 | } bkey; |
| 57 | DB *db; |
| 58 | DBT data, key; |
| 59 | HASHINFO info; |
| 60 | int ch; |
| 61 | u_char buf[MAXNAMLEN255 + 1]; |
| 62 | char dbtmp[PATH_MAX1024], dbname[PATH_MAX1024]; |
| 63 | |
| 64 | (void)snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN"/var/run/"); |
| 65 | (void)snprintf(dbname, sizeof(dbname), "%sdev.db", _PATH_VARRUN"/var/run/"); |
| 66 | |
| 67 | if (unveil(_PATH_DEV"/dev/", "r") == -1) |
| 68 | err(1, "unveil %s", _PATH_DEV"/dev/"); |
| 69 | if (unveil(dbtmp, "rwc") == -1) |
| 70 | err(1, "unveil %s", dbtmp); |
| 71 | if (unveil(dbname, "wc") == -1) |
| 72 | err(1, "unveil %s", dbname); |
| 73 | if (pledge("stdio rpath wpath cpath flock", NULL((void *)0)) == -1) |
| 74 | err(1, "pledge"); |
| 75 | |
| 76 | while ((ch = getopt(argc, argv, "")) != -1) |
| 77 | switch(ch) { |
| 78 | case '?': |
| 79 | default: |
| 80 | usage(); |
| 81 | } |
| 82 | argc -= optind; |
| 83 | argv += optind; |
Value stored to 'argv' is never read | |
| 84 | |
| 85 | if (argc > 0) |
| 86 | usage(); |
| 87 | |
| 88 | if (chdir(_PATH_DEV"/dev/")) |
| 89 | err(1, "%s", _PATH_DEV"/dev/"); |
| 90 | |
| 91 | dirp = opendir("."); |
| 92 | |
| 93 | bzero(&info, sizeof(info)); |
| 94 | info.bsize = 8192; |
| 95 | db = dbopen(dbtmp, O_CREAT0x0200|O_EXLOCK0x0020|O_RDWR0x0002|O_TRUNC0x0400, |
| 96 | S_IRUSR0000400|S_IWUSR0000200|S_IRGRP0000040|S_IROTH0000004, DB_HASH, &info); |
| 97 | if (db == NULL((void *)0)) |
| 98 | err(1, "%s", dbtmp); |
| 99 | |
| 100 | /* |
| 101 | * Keys are a mode_t followed by a dev_t. The former is the type of |
| 102 | * the file (mode & S_IFMT), the latter is the st_rdev field. Note |
| 103 | * that the structure may contain padding, so we have to clear it |
| 104 | * out here. |
| 105 | */ |
| 106 | bzero(&bkey, sizeof(bkey)); |
| 107 | key.data = &bkey; |
| 108 | key.size = sizeof(bkey); |
| 109 | data.data = buf; |
| 110 | while ((dp = readdir(dirp))) { |
| 111 | if (strcmp(dp->d_name, "..") == 0) |
| 112 | continue; |
| 113 | |
| 114 | if (lstat(dp->d_name, &sb)) { |
| 115 | warn("%s", dp->d_name); |
| 116 | continue; |
| 117 | } |
| 118 | |
| 119 | /* Create the key. */ |
| 120 | if (S_ISCHR(sb.st_mode)((sb.st_mode & 0170000) == 0020000)) |
| 121 | bkey.type = S_IFCHR0020000; |
| 122 | else if (S_ISBLK(sb.st_mode)((sb.st_mode & 0170000) == 0060000)) |
| 123 | bkey.type = S_IFBLK0060000; |
| 124 | else |
| 125 | continue; |
| 126 | bkey.dev = sb.st_rdev; |
| 127 | |
| 128 | /* |
| 129 | * Create the data; nul terminate the name so caller doesn't |
| 130 | * have to. |
| 131 | */ |
| 132 | bcopy(dp->d_name, buf, dp->d_namlen); |
| 133 | buf[dp->d_namlen] = '\0'; |
| 134 | data.size = dp->d_namlen + 1; |
| 135 | if ((db->put)(db, &key, &data, 0)) |
| 136 | err(1, "dbput %s", dbtmp); |
| 137 | } |
| 138 | (void)(db->close)(db); |
| 139 | if (rename(dbtmp, dbname)) |
| 140 | err(1, "rename %s to %s", dbtmp, dbname); |
| 141 | |
| 142 | return (0); |
| 143 | } |
| 144 | |
| 145 | void |
| 146 | usage(void) |
| 147 | { |
| 148 | |
| 149 | (void)fprintf(stderr(&__sF[2]), "usage: dev_mkdb\n"); |
| 150 | exit(1); |
| 151 | } |