usr.sbin/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("$FreeBSD$");
  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
  52 int lineno;                             /* Current spec line number. */
  53
  54 static void      set(char *, NODE *);
  55 static void      unset(char *, NODE *);
  56
  57 NODE *
  58 mtree_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 = strchr(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 (strchr(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
 137 noparent:               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
 165 static void
 166 set(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_SHA256:
 198                         ip->sha256digest = strdup(val);
 199                         if(!ip->sha256digest)
 200                                 errx(1, "strdup");
 201                         break;
 202                 case F_RMD160:
 203                         ip->rmd160digest = strdup(val);
 204                         if(!ip->rmd160digest)
 205                                 errx(1, "strdup");
 206                         break;
 207                 case F_FLAGS:
 208                         if (strcmp("none", val) == 0)
 209                                 ip->st_flags = 0;
 210                         else if (strtofflags(&val, &ip->st_flags, NULL) != 0)
 211                                 errx(1, "line %d: invalid flag %s",lineno, val);
 212                         break;
 213                 case F_GID:
 214                         ip->st_gid = strtoul(val, &ep, 10);
 215                         if (*ep)
 216                                 errx(1, "line %d: invalid gid %s", lineno, val);
 217                         break;
 218                 case F_GNAME:
 219                         if ((gr = getgrnam(val)) == NULL)
 220                             errx(1, "line %d: unknown group %s", lineno, val);
 221                         ip->st_gid = gr->gr_gid;
 222                         break;
 223                 case F_IGN:
 224                         /* just set flag bit */
 225                         break;
 226                 case F_MODE:
 227                         if ((m = setmode(val)) == NULL)
 228                                 errx(1, "line %d: invalid file mode %s",
 229                                 lineno, val);
 230                         ip->st_mode = getmode(m, 0);
 231                         free(m);
 232                         break;
 233                 case F_NLINK:
 234                         ip->st_nlink = strtoul(val, &ep, 10);
 235                         if (*ep)
 236                                 errx(1, "line %d: invalid link count %s",
 237                                 lineno,  val);
 238                         break;
 239                 case F_OPT:
 240                         /* just set flag bit */
 241                         break;
 242                 case F_SIZE:
 243                         ip->st_size = strtoq(val, &ep, 10);
 244                         if (*ep)
 245                                 errx(1, "line %d: invalid size %s",
 246                                 lineno, val);
 247                         break;
 248                 case F_SLINK:
 249                         ip->slink = malloc(strlen(val) + 1);
 250                         if (ip->slink == NULL)
 251                                 errx(1, "malloc");
 252                         if (strunvis(ip->slink, val) == -1)
 253                                 errx(1, "symlink %s is ill-encoded", val);
 254                         break;
 255                 case F_TIME:
 256                         ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10);
 257                         if (*ep == '.') {
 258                                 /* Note: we require exactly nine
 259                                  * digits after the decimal point. */
 260                                 val = ep + 1;
 261                                 ip->st_mtimespec.tv_nsec
 262                                     = strtoul(val, &ep, 10);
 263                         } else
 264                                 ip->st_mtimespec.tv_nsec = 0;
 265                         if (*ep)
 266                                 errx(1, "line %d: invalid time %s",
 267                                     lineno, val);
 268                         break;
 269                 case F_TYPE:
 270                         switch(*val) {
 271                         case 'b':
 272                                 if (!strcmp(val, "block"))
 273                                         ip->type = F_BLOCK;
 274                                 break;
 275                         case 'c':
 276                                 if (!strcmp(val, "char"))
 277                                         ip->type = F_CHAR;
 278                                 break;
 279                         case 'd':
 280                                 if (!strcmp(val, "dir"))
 281                                         ip->type = F_DIR;
 282                                 break;
 283                         case 'f':
 284                                 if (!strcmp(val, "file"))
 285                                         ip->type = F_FILE;
 286                                 if (!strcmp(val, "fifo"))
 287                                         ip->type = F_FIFO;
 288                                 break;
 289                         case 'l':
 290                                 if (!strcmp(val, "link"))
 291                                         ip->type = F_LINK;
 292                                 break;
 293                         case 's':
 294                                 if (!strcmp(val, "socket"))
 295                                         ip->type = F_SOCK;
 296                                 break;
 297                         default:
 298                                 errx(1, "line %d: unknown file type %s",
 299                                 lineno, val);
 300                         }
 301                         break;
 302                 case F_UID:
 303                         ip->st_uid = strtoul(val, &ep, 10);
 304                         if (*ep)
 305                                 errx(1, "line %d: invalid uid %s", lineno, val);
 306                         break;
 307                 case F_UNAME:
 308                         if ((pw = getpwnam(val)) == NULL)
 309                             errx(1, "line %d: unknown user %s", lineno, val);
 310                         ip->st_uid = pw->pw_uid;
 311                         break;
 312                 }
 313         }
 314 }
 315
 316 static void
 317 unset(char *t, NODE *ip)
 318 {
 319         char *p;
 320
 321         while ((p = strtok(t, "\n\t ")))
 322                 ip->flags &= ~parsekey(p, NULL);
 323 }