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  * @(#)spec.c   8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.sbin/mtree/spec.c,v 1.13.2.1 2000/06/28 02:33:17 joe Exp $
  35  * $DragonFly: src/usr.sbin/mtree/spec.c,v 1.6 2004/08/30 19:27:22 eirikn Exp $
  36  */
  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 spec(void)
  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), stdin);
  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                 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                         warnx("filename %s is ill-encoded and literally used",
 148                             p);
 149                         strcpy(centry->name, p);
 150                 }
 151                 set(NULL, centry);
 152
 153                 if (!root) {
 154                         last = root = centry;
 155                         root->parent = root;
 156                 } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
 157                         centry->parent = last;
 158                         last = last->child = centry;
 159                 } else {
 160                         centry->parent = last->parent;
 161                         centry->prev = last;
 162                         last = last->next = centry;
 163                 }
 164         }
 165         return (root);
 166 }
 167
 168 static void
 169 set(char *t, NODE *ip)
 170 {
 171         int type;
 172         char *kw, *val = NULL;
 173         struct group *gr;
 174         struct passwd *pw;
 175         mode_t *m;
 176         int value;
 177         char *ep;
 178
 179         for (; (kw = strtok(t, "= \t\n")); t = NULL) {
 180                 ip->flags |= type = parsekey(kw, &value);
 181                 if (value && (val = strtok(NULL, " \t\n")) == NULL)
 182                         errx(1, "line %d: missing value", lineno);
 183                 switch(type) {
 184                 case F_CKSUM:
 185                         ip->cksum = strtoul(val, &ep, 10);
 186                         if (*ep)
 187                                 errx(1, "line %d: invalid checksum %s",
 188                                 lineno, val);
 189                         break;
 190                 case F_MD5:
 191                         ip->md5digest = strdup(val);
 192                         if(!ip->md5digest) {
 193                                 errx(1, "strdup");
 194                         }
 195                         break;
 196                 case F_SHA1:
 197                         ip->sha1digest = strdup(val);
 198                         if(!ip->sha1digest) {
 199                                 errx(1, "strdup");
 200                         }
 201                         break;
 202                 case F_RMD160:
 203                         ip->rmd160digest = strdup(val);
 204                         if(!ip->rmd160digest) {
 205                                 errx(1, "strdup");
 206                         }
 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 = 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                         if ((ip->slink = strdup(val)) == NULL)
 248                                 errx(1, "strdup");
 249                         break;
 250                 case F_TIME:
 251                         ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10);
 252                         if (*ep != '.')
 253                                 errx(1, "line %d: invalid time %s",
 254                                 lineno, val);
 255                         val = ep + 1;
 256                         ip->st_mtimespec.tv_nsec = strtoul(val, &ep, 10);
 257                         if (*ep)
 258                                 errx(1, "line %d: invalid time %s",
 259                                 lineno, val);
 260                         break;
 261                 case F_TYPE:
 262                         switch(*val) {
 263                         case 'b':
 264                                 if (!strcmp(val, "block"))
 265                                         ip->type = F_BLOCK;
 266                                 break;
 267                         case 'c':
 268                                 if (!strcmp(val, "char"))
 269                                         ip->type = F_CHAR;
 270                                 break;
 271                         case 'd':
 272                                 if (!strcmp(val, "dir"))
 273                                         ip->type = F_DIR;
 274                                 break;
 275                         case 'f':
 276                                 if (!strcmp(val, "file"))
 277                                         ip->type = F_FILE;
 278                                 if (!strcmp(val, "fifo"))
 279                                         ip->type = F_FIFO;
 280                                 break;
 281                         case 'l':
 282                                 if (!strcmp(val, "link"))
 283                                         ip->type = F_LINK;
 284                                 break;
 285                         case 's':
 286                                 if (!strcmp(val, "socket"))
 287                                         ip->type = F_SOCK;
 288                                 break;
 289                         default:
 290                                 errx(1, "line %d: unknown file type %s",
 291                                 lineno, val);
 292                         }
 293                         break;
 294                 case F_UID:
 295                         ip->st_uid = strtoul(val, &ep, 10);
 296                         if (*ep)
 297                                 errx(1, "line %d: invalid uid %s", lineno, val);
 298                         break;
 299                 case F_UNAME:
 300                         if ((pw = getpwnam(val)) == NULL)
 301                             errx(1, "line %d: unknown user %s", lineno, val);
 302                         ip->st_uid = pw->pw_uid;
 303                         break;
 304                 }
 305         }
 306 }
 307
 308 static void
 309 unset(char *t, NODE *ip)
 310 {
 311         char *p;
 312
 313         while ((p = strtok(t, "\n\t ")))
 314                 ip->flags &= ~parsekey(p, NULL);
 315 }