spec.c revision 122135
1/*- 2 * Copyright (c) 1989, 1993 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if 0 31#ifndef lint 32static char sccsid[] = "@(#)spec.c 8.1 (Berkeley) 6/6/93"; 33#endif /* not lint */ 34#endif 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: head/usr.sbin/mtree/spec.c 122135 2003-11-05 20:07:40Z phk $"); 37 38#include <sys/types.h> 39#include <sys/stat.h> 40#include <ctype.h> 41#include <err.h> 42#include <errno.h> 43#include <fts.h> 44#include <grp.h> 45#include <pwd.h> 46#include <stdio.h> 47#include <unistd.h> 48#include <vis.h> 49#include "mtree.h" 50#include "extern.h" 51 52int lineno; /* Current spec line number. */ 53 54static void set(char *, NODE *); 55static void unset(char *, NODE *); 56 57NODE * 58mtree_readspec(FILE *fi) 59{ 60 NODE *centry, *last; 61 char *p; 62 NODE ginfo, *root; 63 int c_cur, c_next; 64 char buf[2048]; 65 66 centry = last = root = NULL; 67 bzero(&ginfo, sizeof(ginfo)); 68 c_cur = c_next = 0; 69 for (lineno = 1; fgets(buf, sizeof(buf), fi); 70 ++lineno, c_cur = c_next, c_next = 0) { 71 /* Skip empty lines. */ 72 if (buf[0] == '\n') 73 continue; 74 75 /* Find end of line. */ 76 if ((p = index(buf, '\n')) == NULL) 77 errx(1, "line %d too long", lineno); 78 79 /* See if next line is continuation line. */ 80 if (p[-1] == '\\') { 81 --p; 82 c_next = 1; 83 } 84 85 /* Null-terminate the line. */ 86 *p = '\0'; 87 88 /* Skip leading whitespace. */ 89 for (p = buf; *p && isspace(*p); ++p); 90 91 /* If nothing but whitespace or comment char, continue. */ 92 if (!*p || *p == '#') 93 continue; 94 95#ifdef DEBUG 96 (void)fprintf(stderr, "line %d: {%s}\n", lineno, p); 97#endif 98 if (c_cur) { 99 set(p, centry); 100 continue; 101 } 102 103 /* Grab file name, "$", "set", or "unset". */ 104 if ((p = strtok(p, "\n\t ")) == NULL) 105 errx(1, "line %d: missing field", lineno); 106 107 if (p[0] == '/') 108 switch(p[1]) { 109 case 's': 110 if (strcmp(p + 1, "set")) 111 break; 112 set(NULL, &ginfo); 113 continue; 114 case 'u': 115 if (strcmp(p + 1, "unset")) 116 break; 117 unset(NULL, &ginfo); 118 continue; 119 } 120 121 if (index(p, '/')) 122 errx(1, "line %d: slash character in file name", 123 lineno); 124 125 if (!strcmp(p, "..")) { 126 /* Don't go up, if haven't gone down. */ 127 if (!root) 128 goto noparent; 129 if (last->type != F_DIR || last->flags & F_DONE) { 130 if (last == root) 131 goto noparent; 132 last = last->parent; 133 } 134 last->flags |= F_DONE; 135 continue; 136 137noparent: errx(1, "line %d: no parent node", lineno); 138 } 139 140 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL) 141 errx(1, "calloc"); 142 *centry = ginfo; 143#define MAGIC "?*[" 144 if (strpbrk(p, MAGIC)) 145 centry->flags |= F_MAGIC; 146 if (strunvis(centry->name, p) == -1) 147 errx(1, "filename %s is ill-encoded", p); 148 set(NULL, centry); 149 150 if (!root) { 151 last = root = centry; 152 root->parent = root; 153 } else if (last->type == F_DIR && !(last->flags & F_DONE)) { 154 centry->parent = last; 155 last = last->child = centry; 156 } else { 157 centry->parent = last->parent; 158 centry->prev = last; 159 last = last->next = centry; 160 } 161 } 162 return (root); 163} 164 165static void 166set(char *t, NODE *ip) 167{ 168 int type; 169 char *kw, *val = NULL; 170 struct group *gr; 171 struct passwd *pw; 172 mode_t *m; 173 int value; 174 char *ep; 175 176 for (; (kw = strtok(t, "= \t\n")); t = NULL) { 177 ip->flags |= type = parsekey(kw, &value); 178 if (value && (val = strtok(NULL, " \t\n")) == NULL) 179 errx(1, "line %d: missing value", lineno); 180 switch(type) { 181 case F_CKSUM: 182 ip->cksum = strtoul(val, &ep, 10); 183 if (*ep) 184 errx(1, "line %d: invalid checksum %s", 185 lineno, val); 186 break; 187 case F_MD5: 188 ip->md5digest = strdup(val); 189 if(!ip->md5digest) 190 errx(1, "strdup"); 191 break; 192 case F_SHA1: 193 ip->sha1digest = strdup(val); 194 if(!ip->sha1digest) 195 errx(1, "strdup"); 196 break; 197 case F_RMD160: 198 ip->rmd160digest = strdup(val); 199 if(!ip->rmd160digest) 200 errx(1, "strdup"); 201 break; 202 case F_FLAGS: 203 if (strcmp("none", val) == 0) 204 ip->st_flags = 0; 205 else if (strtofflags(&val, &ip->st_flags, NULL) != 0) 206 errx(1, "line %d: invalid flag %s",lineno, val); 207 break; 208 case F_GID: 209 ip->st_gid = strtoul(val, &ep, 10); 210 if (*ep) 211 errx(1, "line %d: invalid gid %s", lineno, val); 212 break; 213 case F_GNAME: 214 if ((gr = getgrnam(val)) == NULL) 215 errx(1, "line %d: unknown group %s", lineno, val); 216 ip->st_gid = gr->gr_gid; 217 break; 218 case F_IGN: 219 /* just set flag bit */ 220 break; 221 case F_MODE: 222 if ((m = setmode(val)) == NULL) 223 errx(1, "line %d: invalid file mode %s", 224 lineno, val); 225 ip->st_mode = getmode(m, 0); 226 free(m); 227 break; 228 case F_NLINK: 229 ip->st_nlink = strtoul(val, &ep, 10); 230 if (*ep) 231 errx(1, "line %d: invalid link count %s", 232 lineno, val); 233 break; 234 case F_SIZE: 235 ip->st_size = strtoq(val, &ep, 10); 236 if (*ep) 237 errx(1, "line %d: invalid size %s", 238 lineno, val); 239 break; 240 case F_SLINK: 241 ip->slink = malloc(strlen(val)); 242 if (ip->slink == NULL) 243 errx(1, "malloc"); 244 if (strunvis(ip->slink, val) == -1) 245 errx(1, "symlink %s is ill-encoded", val); 246 break; 247 case F_TIME: 248 ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10); 249 if (*ep != '.') 250 errx(1, "line %d: invalid time %s", 251 lineno, val); 252 val = ep + 1; 253 ip->st_mtimespec.tv_nsec = strtoul(val, &ep, 10); 254 if (*ep) 255 errx(1, "line %d: invalid time %s", 256 lineno, val); 257 break; 258 case F_TYPE: 259 switch(*val) { 260 case 'b': 261 if (!strcmp(val, "block")) 262 ip->type = F_BLOCK; 263 break; 264 case 'c': 265 if (!strcmp(val, "char")) 266 ip->type = F_CHAR; 267 break; 268 case 'd': 269 if (!strcmp(val, "dir")) 270 ip->type = F_DIR; 271 break; 272 case 'f': 273 if (!strcmp(val, "file")) 274 ip->type = F_FILE; 275 if (!strcmp(val, "fifo")) 276 ip->type = F_FIFO; 277 break; 278 case 'l': 279 if (!strcmp(val, "link")) 280 ip->type = F_LINK; 281 break; 282 case 's': 283 if (!strcmp(val, "socket")) 284 ip->type = F_SOCK; 285 break; 286 default: 287 errx(1, "line %d: unknown file type %s", 288 lineno, val); 289 } 290 break; 291 case F_UID: 292 ip->st_uid = strtoul(val, &ep, 10); 293 if (*ep) 294 errx(1, "line %d: invalid uid %s", lineno, val); 295 break; 296 case F_UNAME: 297 if ((pw = getpwnam(val)) == NULL) 298 errx(1, "line %d: unknown user %s", lineno, val); 299 ip->st_uid = pw->pw_uid; 300 break; 301 } 302 } 303} 304 305static void 306unset(char *t, NODE *ip) 307{ 308 char *p; 309 310 while ((p = strtok(t, "\n\t "))) 311 ip->flags &= ~parsekey(p, NULL); 312} 313