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