BSD 4_4_Lite2 release

[unix-history] / usr / src / usr.sbin / mtree / spec.c

/*-
* Copyright (c) 1989, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)spec.c      8.2 (Berkeley) 4/28/95";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <fts.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include "mtree.h"
#include "extern.h"

int lineno;                             /* Current spec line number. */

static void      set __P((char *, NODE *));
static void      unset __P((char *, NODE *));

NODE *
spec()
{
       register NODE *centry, *last;
       register char *p;
       NODE ginfo, *root;
       int c_cur, c_next;
       char buf[2048];

       root = NULL;
       bzero(&ginfo, sizeof(ginfo));
       c_cur = c_next = 0;
       for (lineno = 1; fgets(buf, sizeof(buf), stdin);
           ++lineno, c_cur = c_next, c_next = 0) {
               /* Skip empty lines. */
               if (buf[0] == '\n')
                       continue;

               /* Find end of line. */
               if ((p = index(buf, '\n')) == NULL)
                       err("line %d too long", lineno);

               /* See if next line is continuation line. */
               if (p[-1] == '\\') {
                       --p;
                       c_next = 1;
               }

               /* Null-terminate the line. */
               *p = '\0';

               /* Skip leading whitespace. */
               for (p = buf; *p && isspace(*p); ++p);

               /* If nothing but whitespace or comment char, continue. */
               if (!*p || *p == '#')
                       continue;

#ifdef DEBUG
               (void)fprintf(stderr, "line %d: {%s}\n", lineno, p);
#endif
               if (c_cur) {
                       set(p, centry);
                       continue;
               }
                       
               /* Grab file name, "$", "set", or "unset". */
               if ((p = strtok(p, "\n\t ")) == NULL)
                       err("missing field");

               if (p[0] == '/')
                       switch(p[1]) {
                       case 's':
                               if (strcmp(p + 1, "set"))
                                       break;
                               set(NULL, &ginfo);
                               continue;
                       case 'u':
                               if (strcmp(p + 1, "unset"))
                                       break;
                               unset(NULL, &ginfo);
                               continue;
                       }

               if (index(p, '/'))
                       err("slash character in file name");

               if (!strcmp(p, "..")) {
                       /* Don't go up, if haven't gone down. */
                       if (!root)
                               goto noparent;
                       if (last->type != F_DIR || last->flags & F_DONE) {
                               if (last == root)
                                       goto noparent;
                               last = last->parent;
                       }
                       last->flags |= F_DONE;
                       continue;

noparent:               err("no parent node");
               }

               if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL)
                       err("%s", strerror(errno));
               *centry = ginfo;
               (void)strcpy(centry->name, p);
#define MAGIC   "?*["
               if (strpbrk(p, MAGIC))
                       centry->flags |= F_MAGIC;
               set(NULL, centry);

               if (!root) {
                       last = root = centry;
                       root->parent = root;
               } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
                       centry->parent = last;
                       last = last->child = centry;
               } else {
                       centry->parent = last->parent;
                       centry->prev = last;
                       last = last->next = centry;
               }
       }
       return (root);
}

static void
set(t, ip)
       char *t;
       register NODE *ip;
{
       register int type;
       register char *kw, *val;
       struct group *gr;
       struct passwd *pw;
       mode_t *m;
       int value;
       char *ep;

       for (; kw = strtok(t, "= \t\n"); t = NULL) {
               ip->flags |= type = parsekey(kw, &value);
               if (value && (val = strtok(NULL, " \t\n")) == NULL)
                       err("missing value");
               switch(type) {
               case F_CKSUM:
                       ip->cksum = strtoul(val, &ep, 10);
                       if (*ep)
                               err("invalid checksum %s", val);
                       break;
               case F_GID:
                       ip->st_gid = strtoul(val, &ep, 10);
                       if (*ep)
                               err("invalid gid %s", val);
                       break;
               case F_GNAME:
                       if ((gr = getgrnam(val)) == NULL)
                           err("unknown group %s", val);
                       ip->st_gid = gr->gr_gid;
                       break;
               case F_IGN:
                       /* just set flag bit */
                       break;
               case F_MODE:
                       if ((m = setmode(val)) == NULL)
                               err("invalid file mode %s", val);
                       ip->st_mode = getmode(m, 0);
                       break;
               case F_NLINK:
                       ip->st_nlink = strtoul(val, &ep, 10);
                       if (*ep)
                               err("invalid link count %s", val);
                       break;
               case F_SIZE:
                       ip->st_size = strtouq(val, &ep, 10);
                       if (*ep)
                               err("invalid size %s", val);
                       break;
               case F_SLINK:
                       if ((ip->slink = strdup(val)) == NULL)
                               err("%s", strerror(errno));
                       break;
               case F_TIME:
                       ip->st_mtimespec.ts_sec = strtoul(val, &ep, 10);
                       if (*ep != '.')
                               err("invalid time %s", val);
                       val = ep + 1;
                       ip->st_mtimespec.ts_nsec = strtoul(val, &ep, 10);
                       if (*ep)
                               err("invalid time %s", val);
                       break;
               case F_TYPE:
                       switch(*val) {
                       case 'b':
                               if (!strcmp(val, "block"))
                                       ip->type = F_BLOCK;
                               break;
                       case 'c':
                               if (!strcmp(val, "char"))
                                       ip->type = F_CHAR;
                               break;
                       case 'd':
                               if (!strcmp(val, "dir"))
                                       ip->type = F_DIR;
                               break;
                       case 'f':
                               if (!strcmp(val, "file"))
                                       ip->type = F_FILE;
                               if (!strcmp(val, "fifo"))
                                       ip->type = F_FIFO;
                               break;
                       case 'l':
                               if (!strcmp(val, "link"))
                                       ip->type = F_LINK;
                               break;
                       case 's':
                               if (!strcmp(val, "socket"))
                                       ip->type = F_SOCK;
                               break;
                       default:
                               err("unknown file type %s", val);
                       }
                       break;
               case F_UID:
                       ip->st_uid = strtoul(val, &ep, 10);
                       if (*ep)
                               err("invalid uid %s", val);
                       break;
               case F_UNAME:
                       if ((pw = getpwnam(val)) == NULL)
                           err("unknown user %s", val);
                       ip->st_uid = pw->pw_uid;
                       break;
               }
       }
}

static void
unset(t, ip)
       char *t;
       register NODE *ip;
{
       register char *p;

       while (p = strtok(t, "\n\t "))
               ip->flags &= ~parsekey(p, NULL);
}