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  * @(#)spec.c   8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.sbin/mtree/spec.c,v 1.13.2.1 2000/06/28 02:33:17 joe Exp $
  31  * $DragonFly: src/usr.sbin/mtree/spec.c,v 1.6 2004/08/30 19:27:22 eirikn Exp $
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <ctype.h>
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <fts.h>
  40 #include <grp.h>
  41 #include <pwd.h>
  42 #include <stdio.h>
  43 #include <unistd.h>
  44 #include <vis.h>
  45 #include "mtree.h"
  46 #include "extern.h"
  47
  48 int lineno;                             /* Current spec line number. */
  49
  50 static void      set(char *, NODE *);
  51 static void      unset(char *, NODE *);
  52
  53 NODE *
  54 spec(void)
  55 {
  56         NODE *centry, *last;
  57         char *p;
  58         NODE ginfo, *root;
  59         int c_cur, c_next;
  60         char buf[2048];
  61
  62         centry = last = root = NULL;
  63         bzero(&ginfo, sizeof(ginfo));
  64         c_cur = c_next = 0;
  65         for (lineno = 1; fgets(buf, sizeof(buf), stdin);
  66             ++lineno, c_cur = c_next, c_next = 0) {
  67                 /* Skip empty lines. */
  68                 if (buf[0] == '\n')
  69                         continue;
  70
  71                 /* Find end of line. */
  72                 if ((p = strchr(buf, '\n')) == NULL)
  73                         errx(1, "line %d too long", lineno);
  74
  75                 /* See if next line is continuation line. */
  76                 if (p[-1] == '\\') {
  77                         --p;
  78                         c_next = 1;
  79                 }
  80
  81                 /* Null-terminate the line. */
  82                 *p = '\0';
  83
  84                 /* Skip leading whitespace. */
  85                 for (p = buf; *p && isspace(*p); ++p);
  86
  87                 /* If nothing but whitespace or comment char, continue. */
  88                 if (!*p || *p == '#')
  89                         continue;
  90
  91 #ifdef DEBUG
  92                 fprintf(stderr, "line %d: {%s}\n", lineno, p);
  93 #endif
  94                 if (c_cur) {
  95                         set(p, centry);
  96                         continue;
  97                 }
  98
  99                 /* Grab file name, "$", "set", or "unset". */
 100                 if ((p = strtok(p, "\n\t ")) == NULL)
 101                         errx(1, "line %d: missing field", lineno);
 102
 103                 if (p[0] == '/')
 104                         switch(p[1]) {
 105                         case 's':
 106                                 if (strcmp(p + 1, "set"))
 107                                         break;
 108                                 set(NULL, &ginfo);
 109                                 continue;
 110                         case 'u':
 111                                 if (strcmp(p + 1, "unset"))
 112                                         break;
 113                                 unset(NULL, &ginfo);
 114                                 continue;
 115                         }
 116
 117                 if (strchr(p, '/'))
 118                         errx(1, "line %d: slash character in file name",
 119                         lineno);
 120
 121                 if (!strcmp(p, "..")) {
 122                         /* Don't go up, if haven't gone down. */
 123                         if (!root)
 124                                 goto noparent;
 125                         if (last->type != F_DIR || last->flags & F_DONE) {
 126                                 if (last == root)
 127                                         goto noparent;
 128                                 last = last->parent;
 129                         }
 130                         last->flags |= F_DONE;
 131                         continue;
 132
 133 noparent:               errx(1, "line %d: no parent node", lineno);
 134                 }
 135
 136                 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL)
 137                         errx(1, "calloc");
 138                 *centry = ginfo;
 139 #define MAGIC   "?*["
 140                 if (strpbrk(p, MAGIC))
 141                         centry->flags |= F_MAGIC;
 142                 if (strunvis(centry->name, p) == -1) {
 143                         warnx("filename %s is ill-encoded and literally used",
 144                             p);
 145                         strcpy(centry->name, p);
 146                 }
 147                 set(NULL, centry);
 148
 149                 if (!root) {
 150                         last = root = centry;
 151                         root->parent = root;
 152                 } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
 153                         centry->parent = last;
 154                         last = last->child = centry;
 155                 } else {
 156                         centry->parent = last->parent;
 157                         centry->prev = last;
 158                         last = last->next = centry;
 159                 }
 160         }
 161         return (root);
 162 }
 163
 164 static void
 165 set(char *t, NODE *ip)
 166 {
 167         int type;
 168         char *kw, *val = NULL;
 169         struct group *gr;
 170         struct passwd *pw;
 171         mode_t *m;
 172         int value;
 173         char *ep;
 174
 175         for (; (kw = strtok(t, "= \t\n")); t = NULL) {
 176                 ip->flags |= type = parsekey(kw, &value);
 177                 if (value && (val = strtok(NULL, " \t\n")) == NULL)
 178                         errx(1, "line %d: missing value", lineno);
 179                 switch(type) {
 180                 case F_CKSUM:
 181                         ip->cksum = strtoul(val, &ep, 10);
 182                         if (*ep)
 183                                 errx(1, "line %d: invalid checksum %s",
 184                                 lineno, val);
 185                         break;
 186                 case F_MD5:
 187                         ip->md5digest = strdup(val);
 188                         if(!ip->md5digest) {
 189                                 errx(1, "strdup");
 190                         }
 191                         break;
 192                 case F_SHA1:
 193                         ip->sha1digest = strdup(val);
 194                         if(!ip->sha1digest) {
 195                                 errx(1, "strdup");
 196                         }
 197                         break;
 198                 case F_RMD160:
 199                         ip->rmd160digest = strdup(val);
 200                         if(!ip->rmd160digest) {
 201                                 errx(1, "strdup");
 202                         }
 203                         break;
 204                 case F_FLAGS:
 205                         if (strcmp("none", val) == 0)
 206                                 ip->st_flags = 0;
 207                         else if (strtofflags(&val, &ip->st_flags, NULL) != 0)
 208                                 errx(1, "line %d: invalid flag %s",lineno, val);
 209                         break;
 210                 case F_GID:
 211                         ip->st_gid = strtoul(val, &ep, 10);
 212                         if (*ep)
 213                                 errx(1, "line %d: invalid gid %s", lineno, val);
 214                         break;
 215                 case F_GNAME:
 216                         if ((gr = getgrnam(val)) == NULL)
 217                             errx(1, "line %d: unknown group %s", lineno, val);
 218                         ip->st_gid = gr->gr_gid;
 219                         break;
 220                 case F_IGN:
 221                         /* just set flag bit */
 222                         break;
 223                 case F_MODE:
 224                         if ((m = setmode(val)) == NULL)
 225                                 errx(1, "line %d: invalid file mode %s",
 226                                 lineno, val);
 227                         ip->st_mode = getmode(m, 0);
 228                         free(m);
 229                         break;
 230                 case F_NLINK:
 231                         ip->st_nlink = strtoul(val, &ep, 10);
 232                         if (*ep)
 233                                 errx(1, "line %d: invalid link count %s",
 234                                 lineno,  val);
 235                         break;
 236                 case F_SIZE:
 237                         ip->st_size = strtoq(val, &ep, 10);
 238                         if (*ep)
 239                                 errx(1, "line %d: invalid size %s",
 240                                 lineno, val);
 241                         break;
 242                 case F_SLINK:
 243                         if ((ip->slink = strdup(val)) == NULL)
 244                                 errx(1, "strdup");
 245                         break;
 246                 case F_TIME:
 247                         ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10);
 248                         if (*ep != '.')
 249                                 errx(1, "line %d: invalid time %s",
 250                                 lineno, val);
 251                         val = ep + 1;
 252                         ip->st_mtimespec.tv_nsec = strtoul(val, &ep, 10);
 253                         if (*ep)
 254                                 errx(1, "line %d: invalid time %s",
 255                                 lineno, val);
 256                         break;
 257                 case F_TYPE:
 258                         switch(*val) {
 259                         case 'b':
 260                                 if (!strcmp(val, "block"))
 261                                         ip->type = F_BLOCK;
 262                                 break;
 263                         case 'c':
 264                                 if (!strcmp(val, "char"))
 265                                         ip->type = F_CHAR;
 266                                 break;
 267                         case 'd':
 268                                 if (!strcmp(val, "dir"))
 269                                         ip->type = F_DIR;
 270                                 break;
 271                         case 'f':
 272                                 if (!strcmp(val, "file"))
 273                                         ip->type = F_FILE;
 274                                 if (!strcmp(val, "fifo"))
 275                                         ip->type = F_FIFO;
 276                                 break;
 277                         case 'l':
 278                                 if (!strcmp(val, "link"))
 279                                         ip->type = F_LINK;
 280                                 break;
 281                         case 's':
 282                                 if (!strcmp(val, "socket"))
 283                                         ip->type = F_SOCK;
 284                                 break;
 285                         default:
 286                                 errx(1, "line %d: unknown file type %s",
 287                                 lineno, val);
 288                         }
 289                         break;
 290                 case F_UID:
 291                         ip->st_uid = strtoul(val, &ep, 10);
 292                         if (*ep)
 293                                 errx(1, "line %d: invalid uid %s", lineno, val);
 294                         break;
 295                 case F_UNAME:
 296                         if ((pw = getpwnam(val)) == NULL)
 297                             errx(1, "line %d: unknown user %s", lineno, val);
 298                         ip->st_uid = pw->pw_uid;
 299                         break;
 300                 }
 301         }
 302 }
 303
 304 static void
 305 unset(char *t, NODE *ip)
 306 {
 307         char *p;
 308
 309         while ((p = strtok(t, "\n\t ")))
 310                 ip->flags &= ~parsekey(p, NULL);
 311 }