mtree/spec.c

   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
  32 static char sccsid[] = "@(#)spec.c      8.1 (Berkeley) 6/6/93";
  33 #endif /* not lint */
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD: src/usr.sbin/mtree/spec.c,v 1.22 2005/03/29 11:44:17 tobez Exp $");
  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 <stdint.h>
  48 #include <unistd.h>
  49 #include <vis.h>
  50 #include "mtree.h"
  51 #include "extern.h"
  52
  53 int lineno;                             /* Current spec line number. */
  54
  55 static void      set(char *, NODE *);
  56 static void      unset(char *, NODE *);
  57
  58 NODE *
  59 mtree_readspec(FILE *fi)
  60 {
  61         NODE *centry, *last;
  62         char *p;
  63         NODE ginfo, *root;
  64         int c_cur, c_next;
  65         char buf[2048];
  66
  67         centry = last = root = NULL;
  68         bzero(&ginfo, sizeof(ginfo));
  69         c_cur = c_next = 0;
  70         for (lineno = 1; fgets(buf, sizeof(buf), fi);
  71             ++lineno, c_cur = c_next, c_next = 0) {
  72                 /* Skip empty lines. */
  73                 if (buf[0] == '\n')
  74                         continue;
  75
  76                 /* Find end of line. */
  77                 if ((p = index(buf, '\n')) == NULL)
  78                         errx(1, "line %d too long", lineno);
  79
  80                 /* See if next line is continuation line. */
  81                 if (p[-1] == '\\') {
  82                         --p;
  83                         c_next = 1;
  84                 }
  85
  86                 /* Null-terminate the line. */
  87                 *p = '\0';
  88
  89                 /* Skip leading whitespace. */
  90                 for (p = buf; *p && isspace(*p); ++p);
  91
  92                 /* If nothing but whitespace or comment char, continue. */
  93                 if (!*p || *p == '#')
  94                         continue;
  95
  96 #ifdef DEBUG
  97                 (void)fprintf(stderr, "line %d: {%s}\n", lineno, p);
  98 #endif
  99                 if (c_cur) {
 100                         set(p, centry);
 101                         continue;
 102                 }
 103
 104                 /* Grab file name, "$", "set", or "unset". */
 105                 if ((p = strtok(p, "\n\t ")) == NULL)
 106                         errx(1, "line %d: missing field", lineno);
 107
 108                 if (p[0] == '/')
 109                         switch(p[1]) {
 110                         case 's':
 111                                 if (strcmp(p + 1, "set"))
 112                                         break;
 113                                 set(NULL, &ginfo);
 114                                 continue;
 115                         case 'u':
 116                                 if (strcmp(p + 1, "unset"))
 117                                         break;
 118                                 unset(NULL, &ginfo);
 119                                 continue;
 120                         }
 121
 122                 if (index(p, '/'))
 123                         errx(1, "line %d: slash character in file name",
 124                         lineno);
 125
 126                 if (!strcmp(p, "..")) {
 127                         /* Don't go up, if haven't gone down. */
 128                         if (!root)
 129                                 goto noparent;
 130                         if (last->type != F_DIR || last->flags & F_DONE) {
 131                                 if (last == root)
 132                                         goto noparent;
 133                                 last = last->parent;
 134                         }
 135                         last->flags |= F_DONE;
 136                         continue;
 137
 138 noparent:               errx(1, "line %d: no parent node", lineno);
 139                 }
 140
 141                 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL)
 142                         errx(1, "calloc");
 143                 *centry = ginfo;
 144 #define MAGIC   "?*["
 145                 if (strpbrk(p, MAGIC))
 146                         centry->flags |= F_MAGIC;
 147                 if (strunvis(centry->name, p) == -1)
 148                         errx(1, "filename %s is ill-encoded", p);
 149                 set(NULL, centry);
 150
 151                 if (!root) {
 152                         last = root = centry;
 153                         root->parent = root;
 154                 } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
 155                         centry->parent = last;
 156                         last = last->child = centry;
 157                 } else {
 158                         centry->parent = last->parent;
 159                         centry->prev = last;
 160                         last = last->next = centry;
 161                 }
 162         }
 163         return (root);
 164 }
 165
 166 static void
 167 set(char *t, NODE *ip)
 168 {
 169         int type;
 170         char *kw, *val = NULL;
 171         struct group *gr;
 172         struct passwd *pw;
 173         mode_t *m;
 174         int value;
 175         char *ep;
 176
 177         for (; (kw = strtok(t, "= \t\n")); t = NULL) {
 178                 ip->flags |= type = parsekey(kw, &value);
 179                 if ((value == 0) || (val = strtok(NULL, " \t\n")) == NULL)
 180                         errx(1, "line %d: missing value", lineno);
 181                 switch(type) {
 182                 case F_CKSUM:
 183                         ip->cksum = strtoul(val, &ep, 10);
 184                         if (*ep)
 185                                 errx(1, "line %d: invalid checksum %s",
 186                                 lineno, val);
 187                         break;
 188                 case F_MD5:
 189                         ip->md5digest = strdup(val);
 190                         if(!ip->md5digest)
 191                                 errx(1, "strdup");
 192                         break;
 193                 case F_SHA1:
 194                         ip->sha1digest = strdup(val);
 195                         if(!ip->sha1digest)
 196                                 errx(1, "strdup");
 197                         break;
 198                 case F_SHA256:
 199                         ip->sha256digest = strdup(val);
 200                         if(!ip->sha256digest)
 201                                 errx(1, "strdup");
 202                         break;
 203                 case F_RMD160:
 204                         ip->rmd160digest = strdup(val);
 205                         if(!ip->rmd160digest)
 206                                 errx(1, "strdup");
 207                         break;
 208                 case F_FLAGS:
 209                         if (strcmp("none", val) == 0)
 210                                 ip->st_flags = 0;
 211                         else if (strtofflags(&val, &ip->st_flags, NULL) != 0)
 212                                 errx(1, "line %d: invalid flag %s",lineno, val);
 213                         break;
 214                 case F_GID:
 215                         ip->st_gid = (gid_t)strtoul(val, &ep, 10);
 216                         if (*ep)
 217                                 errx(1, "line %d: invalid gid %s", lineno, val);
 218                         break;
 219                 case F_GNAME:
 220                         if ((gr = getgrnam(val)) == NULL)
 221                             errx(1, "line %d: unknown group %s", lineno, val);
 222                         ip->st_gid = gr->gr_gid;
 223                         break;
 224                 case F_IGN:
 225                         /* just set flag bit */
 226                         break;
 227                 case F_MODE:
 228                         if ((m = setmode(val)) == NULL)
 229                                 errx(1, "line %d: invalid file mode %s",
 230                                 lineno, val);
 231                         ip->st_mode = getmode(m, 0);
 232                         free(m);
 233                         break;
 234                 case F_NLINK:
 235                         ip->st_nlink = strtoul(val, &ep, 10);
 236                         if (*ep)
 237                                 errx(1, "line %d: invalid link count %s",
 238                                 lineno,  val);
 239                         break;
 240                 case F_SIZE:
 241                         ip->st_size = strtoq(val, &ep, 10);
 242                         if (*ep)
 243                                 errx(1, "line %d: invalid size %s",
 244                                 lineno, val);
 245                         break;
 246                 case F_SLINK:
 247                         ip->slink = malloc(strlen(val) + 1);
 248                         if (ip->slink == NULL)
 249                                 errx(1, "malloc");
 250                         if (strunvis(ip->slink, val) == -1)
 251                                 errx(1, "symlink %s is ill-encoded", val);
 252                         break;
 253                 case F_TIME:
 254                         ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10);
 255                         if (*ep != '.')
 256                                 errx(1, "line %d: invalid time %s",
 257                                 lineno, val);
 258                         val = ep + 1;
 259                         ip->st_mtimespec.tv_nsec = strtoul(val, &ep, 10);
 260                         if (*ep)
 261                                 errx(1, "line %d: invalid time %s",
 262                                 lineno, val);
 263                         break;
 264                 case F_TYPE:
 265                         switch(*val) {
 266                         case 'b':
 267                                 if (!strcmp(val, "block"))
 268                                         ip->type = F_BLOCK;
 269                                 break;
 270                         case 'c':
 271                                 if (!strcmp(val, "char"))
 272                                         ip->type = F_CHAR;
 273                                 break;
 274                         case 'd':
 275                                 if (!strcmp(val, "dir"))
 276                                         ip->type = F_DIR;
 277                                 break;
 278                         case 'f':
 279                                 if (!strcmp(val, "file"))
 280                                         ip->type = F_FILE;
 281                                 if (!strcmp(val, "fifo"))
 282                                         ip->type = F_FIFO;
 283                                 break;
 284                         case 'l':
 285                                 if (!strcmp(val, "link"))
 286                                         ip->type = F_LINK;
 287                                 break;
 288                         case 's':
 289                                 if (!strcmp(val, "socket"))
 290                                         ip->type = F_SOCK;
 291                                 break;
 292                         default:
 293                                 errx(1, "line %d: unknown file type %s",
 294                                 lineno, val);
 295                         }
 296                         break;
 297                 case F_UID:
 298                         ip->st_uid = (uid_t)strtoul(val, &ep, 10);
 299                         if (*ep)
 300                                 errx(1, "line %d: invalid uid %s", lineno, val);
 301                         break;
 302                 case F_UNAME:
 303                         if ((pw = getpwnam(val)) == NULL)
 304                             errx(1, "line %d: unknown user %s", lineno, val);
 305                         ip->st_uid = pw->pw_uid;
 306                         break;
 307                 }
 308         }
 309 }
 310
 311 static void
 312 unset(char *t, NODE *ip)
 313 {
 314         char *p;
 315
 316         while ((p = strtok(t, "\n\t ")))
 317                 ip->flags &= ~parsekey(p, NULL);
 318 }