mtree/spec.c

   1 /*      $NetBSD: spec.c,v 1.12 1998/09/23 19:46:00 itohy Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1989, 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)spec.c      8.2 (Berkeley) 4/28/95";
  40 #else
  41 __RCSID("$NetBSD: spec.c,v 1.12 1998/09/23 19:46:00 itohy Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46 #include <sys/stat.h>
  47 #include <ctype.h>
  48 #include <errno.h>
  49 #include <fts.h>
  50 #include <grp.h>
  51 #include <pwd.h>
  52 #include <stdio.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 #include "mtree.h"
  57 #include "extern.h"
  58
  59 int lineno;                             /* Current spec line number. */
  60
  61 static void      set __P((char *, NODE *));
  62 static void      unset __P((char *, NODE *));
  63
  64 NODE *
  65 spec()
  66 {
  67         NODE *centry, *last;
  68         char *p;
  69         NODE ginfo, *root;
  70         int c_cur, c_next;
  71         char buf[2048];
  72
  73         root = NULL;
  74         centry = last = NULL;
  75         memset(&ginfo, 0, sizeof(ginfo));
  76         c_cur = c_next = 0;
  77         for (lineno = 1; fgets(buf, sizeof(buf), stdin);
  78             ++lineno, c_cur = c_next, c_next = 0) {
  79                 /* Skip empty lines. */
  80                 if (buf[0] == '\n')
  81                         continue;
  82
  83                 /* Find end of line. */
  84                 if ((p = strchr(buf, '\n')) == NULL)
  85                         mtree_err("line %d too long", lineno);
  86
  87                 /* See if next line is continuation line. */
  88                 if (p[-1] == '\\') {
  89                         --p;
  90                         c_next = 1;
  91                 }
  92
  93                 /* Null-terminate the line. */
  94                 *p = '\0';
  95
  96                 /* Skip leading whitespace. */
  97                 for (p = buf; *p && isspace(*p); ++p);
  98
  99                 /* If nothing but whitespace or comment char, continue. */
 100                 if (!*p || *p == '#')
 101                         continue;
 102
 103 #ifdef DEBUG
 104                 (void)fprintf(stderr, "line %d: {%s}\n", lineno, p);
 105 #endif
 106                 if (c_cur) {
 107                         set(p, centry);
 108                         continue;
 109                 }
 110
 111                 /* Grab file name, "$", "set", or "unset". */
 112                 if ((p = strtok(p, "\n\t ")) == NULL)
 113                         mtree_err("missing field");
 114
 115                 if (p[0] == '/')
 116                         switch(p[1]) {
 117                         case 's':
 118                                 if (strcmp(p + 1, "set"))
 119                                         break;
 120                                 set(NULL, &ginfo);
 121                                 continue;
 122                         case 'u':
 123                                 if (strcmp(p + 1, "unset"))
 124                                         break;
 125                                 unset(NULL, &ginfo);
 126                                 continue;
 127                         }
 128
 129                 if (strchr(p, '/'))
 130                         mtree_err("slash character in file name");
 131
 132                 if (!strcmp(p, "..")) {
 133                         /* Don't go up, if haven't gone down. */
 134                         if (!root)
 135                                 goto noparent;
 136                         if (last->type != F_DIR || last->flags & F_DONE) {
 137                                 if (last == root)
 138                                         goto noparent;
 139                                 last = last->parent;
 140                         }
 141                         last->flags |= F_DONE;
 142                         continue;
 143
 144 noparent:               mtree_err("no parent node");
 145                 }
 146
 147                 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL)
 148                         mtree_err("%s", strerror(errno));
 149                 *centry = ginfo;
 150                 (void)strcpy(centry->name, p);
 151 #define MAGIC   "?*["
 152                 if (strpbrk(p, MAGIC))
 153                         centry->flags |= F_MAGIC;
 154                 set(NULL, centry);
 155
 156                 if (!root) {
 157                         last = root = centry;
 158                         root->parent = root;
 159                 } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
 160                         centry->parent = last;
 161                         last = last->child = centry;
 162                 } else {
 163                         centry->parent = last->parent;
 164                         centry->prev = last;
 165                         last = last->next = centry;
 166                 }
 167         }
 168         return (root);
 169 }
 170
 171 static void
 172 set(t, ip)
 173         char *t;
 174         NODE *ip;
 175 {
 176         int type;
 177         char *kw, *val;
 178         struct group *gr;
 179         struct passwd *pw;
 180         mode_t *m;
 181         int value;
 182         char *ep;
 183
 184         val = NULL;
 185         for (; (kw = strtok(t, "= \t\n")) != NULL; t = NULL) {
 186                 ip->flags |= type = parsekey(kw, &value);
 187                 if (value && (val = strtok(NULL, " \t\n")) == NULL)
 188                         mtree_err("missing value");
 189                 switch(type) {
 190                 case F_CKSUM:
 191                         ip->cksum = strtoul(val, &ep, 10);
 192                         if (*ep)
 193                                 mtree_err("invalid checksum %s", val);
 194                         break;
 195                 case F_GID:
 196                         ip->st_gid = (gid_t)strtoul(val, &ep, 10);
 197                         if (*ep)
 198                                 mtree_err("invalid gid %s", val);
 199                         break;
 200                 case F_GNAME:
 201                         if ((gr = getgrnam(val)) == NULL)
 202                             mtree_err("unknown group %s", val);
 203                         ip->st_gid = gr->gr_gid;
 204                         break;
 205                 case F_IGN:
 206                         /* just set flag bit */
 207                         break;
 208                 case F_MODE:
 209                         if ((m = setmode(val)) == NULL)
 210                                 mtree_err("invalid file mode %s", val);
 211                         ip->st_mode = getmode(m, 0);
 212                         free(m);
 213                         break;
 214                 case F_NLINK:
 215                         ip->st_nlink = (nlink_t)strtoul(val, &ep, 10);
 216                         if (*ep)
 217                                 mtree_err("invalid link count %s", val);
 218                         break;
 219                 case F_SIZE:
 220                         ip->st_size = (off_t)strtoq(val, &ep, 10);
 221                         if (*ep)
 222                                 mtree_err("invalid size %s", val);
 223                         break;
 224                 case F_SLINK:
 225                         if ((ip->slink = strdup(val)) == NULL)
 226                                 mtree_err("%s", strerror(errno));
 227                         break;
 228                 case F_TIME:
 229                         ip->st_mtimespec.tv_sec =
 230                             (time_t)strtoul(val, &ep, 10);
 231                         if (*ep != '.')
 232                                 mtree_err("invalid time %s", val);
 233                         val = ep + 1;
 234                         ip->st_mtimespec.tv_nsec = strtol(val, &ep, 10);
 235                         if (*ep)
 236                                 mtree_err("invalid time %s", val);
 237                         break;
 238                 case F_TYPE:
 239                         switch(*val) {
 240                         case 'b':
 241                                 if (!strcmp(val, "block"))
 242                                         ip->type = F_BLOCK;
 243                                 break;
 244                         case 'c':
 245                                 if (!strcmp(val, "char"))
 246                                         ip->type = F_CHAR;
 247                                 break;
 248                         case 'd':
 249                                 if (!strcmp(val, "dir"))
 250                                         ip->type = F_DIR;
 251                                 break;
 252                         case 'f':
 253                                 if (!strcmp(val, "file"))
 254                                         ip->type = F_FILE;
 255                                 if (!strcmp(val, "fifo"))
 256                                         ip->type = F_FIFO;
 257                                 break;
 258                         case 'l':
 259                                 if (!strcmp(val, "link"))
 260                                         ip->type = F_LINK;
 261                                 break;
 262                         case 's':
 263                                 if (!strcmp(val, "socket"))
 264                                         ip->type = F_SOCK;
 265                                 break;
 266                         default:
 267                                 mtree_err("unknown file type %s", val);
 268                         }
 269                         break;
 270                 case F_UID:
 271                         ip->st_uid = (uid_t)strtoul(val, &ep, 10);
 272                         if (*ep)
 273                                 mtree_err("invalid uid %s", val);
 274                         break;
 275                 case F_UNAME:
 276                         if ((pw = getpwnam(val)) == NULL)
 277                             mtree_err("unknown user %s", val);
 278                         ip->st_uid = pw->pw_uid;
 279                         break;
 280                 }
 281         }
 282 }
 283
 284 static void
 285 unset(t, ip)
 286         char *t;
 287         NODE *ip;
 288 {
 289         char *p;
 290
 291         while ((p = strtok(t, "\n\t ")) != NULL)
 292                 ip->flags &= ~parsekey(p, NULL);
 293 }