]> Dogcows Code - chaz/tar/commitdiff
*** empty log message ***
authorFrançois Pinard <pinard@iro.umontreal.ca>
Wed, 16 Nov 1994 02:46:00 +0000 (02:46 +0000)
committerFrançois Pinard <pinard@iro.umontreal.ca>
Wed, 16 Nov 1994 02:46:00 +0000 (02:46 +0000)
src/extract.c

index ff86642673b3a3575e5057e85875b0081287fbad..f3f7380671567ba320bca06bc9090cfc17f71b08 100644 (file)
@@ -100,7 +100,7 @@ struct saved_dir_info
   int mode;
   int atime;
   int mtime;
-  saved_dir_info *next;
+  struct saved_dir_info *next;
 };
   
 struct saved_dir_info *saved_dir_info_head;
@@ -146,8 +146,10 @@ extract_archive()
        struct saved_dir_info *tmp;
 /*     int end_nulls; */
        char **longp;
+       char *bp;
        static char *longname;
        static char *longlink;
+       int bumplongs;
        
        saverec(&head);                 /* Make sure it sticks around */
        userec(head);                   /* And go past it in the archive */
@@ -174,7 +176,8 @@ extract_archive()
         * the header record.
         */
        skipcrud = 0;
-       while (!f_absolute_paths && '/' == head->header.name[skipcrud]) {
+       while (!f_absolute_paths
+              && '/' == (longname ? longname : head->header.name)[skipcrud]) {
                static int warned_once = 0;
 
                skipcrud++;     /* Force relative path */
@@ -183,6 +186,9 @@ extract_archive()
                 }
         }
 
+        bumplongs = (head->header.linkflag != LF_LONGNAME
+                     && head->header.linkflag != LF_LONGLINK);
+       
         switch (head->header.linkflag) {
 
         default:
@@ -299,8 +305,10 @@ extract_archive()
                  * the size in the open call that creates them.
                  */
                 if (head->header.linkflag == LF_CONTIG)
-                        fd = open(skipcrud+head->header.name, openflag | O_CTG,
-                                hstat.st_mode, hstat.st_size);
+                        fd = open((longname ? longname : head->header.name)
+                                  + skipcrud,
+                                  openflag | O_CTG,
+                                  hstat.st_mode, hstat.st_size);
                 else
  #endif
                 {
@@ -309,21 +317,29 @@ extract_archive()
                          * On raw V7 we won't let them specify -k (f_keep), but
                          * we just bull ahead and create the files.
                          */
-                        fd = creat(skipcrud+head->header.name, 
-                                hstat.st_mode);
+                        fd = creat((longname
+                                    ? longname
+                                    : head->header.name) + skipcrud, 
+                                   hstat.st_mode);
  #else
                         /*
                          * With 3-arg open(), we can do this up right.
                          */
-                        fd = open(skipcrud+head->header.name, openflag,
-                                hstat.st_mode);
+                        fd = open((longname
+                                   ? longname
+                                   : head->header.name) + skipcrud,
+                                  openflag, hstat.st_mode);
  #endif
                 }
 
                 if (fd < 0) {
-                        if (make_dirs(skipcrud+head->header.name))
+                        if (make_dirs(longname
+                                      ? longname
+                                      : head->header.name) + skipcrud)
                                 goto again_file;
-                        msg_perror("Could not create file %s",skipcrud+head->header.name);
+                        msg_perror("Could not create file %s",
+                                   skipcrud
+                                   +(longname ? longname : head->header.name));
                         if (head->header.isextended)
                                 skip_extended_headers();
                         skip_file((long)hstat.st_size);
@@ -348,7 +364,7 @@ extract_archive()
                         bcopy(skipcrud+head->header.name, name, namelen);
                         size = hstat.st_size;
                         extract_sparse_file(fd, &size, hstat.st_size,
-                                                name);
+                                            longname ? longname : name);
                 }                      
                 else           
                   for (size = hstat.st_size;
@@ -359,7 +375,9 @@ extract_archive()
                                 numbytes;*/
 
                         if(f_multivol) {
-                                save_name=head->header.name;
+                                save_name=(longname
+                                           ? longname
+                                           : head->header.name);
                                 save_totsize=hstat.st_size;
                                 save_sizeleft=size;
                         }
@@ -405,9 +423,15 @@ extract_archive()
                          * Print it, skip to next file in archive.
                          */
                         if(check<0)
-                                msg_perror("couldn't write to file %s",skipcrud+head->header.name);
+                                msg_perror("couldn't write to file %s",
+                                           (longname
+                                            ? longname
+                                            : head->header.name) + skipcrud);
                         else
-                                msg("could only write %d of %d bytes to file %s",written,check,skipcrud+head->header.name);
+                          msg("could only write %d of %d bytes to file %s",
+                              written,check,(longname
+                                             ? longname
+                                             : head->header.name) + skipcrud);
                         skip_file((long)(size - written));
                         break; /* Still do the close, mod time, chmod, etc */
                 }
@@ -444,7 +468,10 @@ extract_archive()
                 }*/
                 check = close(fd);
                 if (check < 0) {
-                        msg_perror("Error while closing %s",skipcrud+head->header.name);
+                        msg_perror("Error while closing %s",
+                                   (longname
+                                    ? longname
+                                    : head->header.name) + skipcrud);
                 }
 
 
@@ -457,9 +484,15 @@ extract_archive()
                  * user; if running as root, we extract as the original owner.
                  */
                 if (we_are_root || f_do_chown) {
-                        if (chown(skipcrud+head->header.name, hstat.st_uid,
-                                  hstat.st_gid) < 0) {
-                                msg_perror("cannot chown file %s to uid %d gid %d",skipcrud+head->header.name,hstat.st_uid,hstat.st_gid);
+                        if (chown((longname
+                                   ? longname
+                                   : head->header.name) + skipcrud,
+                                  hstat.st_uid, hstat.st_gid) < 0) {
+                          msg_perror("cannot chown file %s to uid %d gid %d",
+                                     (longname
+                                      ? longname
+                                      : head->header.name) + skipcrud,
+                                     hstat.st_uid,hstat.st_gid);
                         }
                 }
 
@@ -476,9 +509,11 @@ extract_archive()
                                acc_upd_times[0]=hstat.st_atime;
                        else acc_upd_times[0] = now;             /* Accessed now */
                        acc_upd_times[1] = hstat.st_mtime; /* Mod'd */
-                       if (utime(skipcrud+head->header.name,
-                           acc_upd_times) < 0) {
-                               msg_perror("couldn't change access and modification times of %s",skipcrud+head->header.name);
+                       if (utime((longname
+                                  ? longname
+                                  : head->header.name) + skipcrud,
+                                 acc_upd_times) < 0) {
+                         msg_perror("couldn't change access and modification times of %s",(longname ? longname : head->header.name) + skipcrud);
                        }
                }
                /* We do the utime before the chmod because some versions of
@@ -500,9 +535,11 @@ extract_archive()
                 */
                if ((!f_keep)
                    || (hstat.st_mode & (S_ISUID|S_ISGID|S_ISVTX))) {
-                       if (chmod(skipcrud+head->header.name,
+                 if (chmod((longname ? longname : head->header.name) + skipcrud,
                                  notumask & (int)hstat.st_mode) < 0) {
-                               msg_perror("cannot change mode of file %s to %ld",skipcrud+head->header.name,notumask & (int)hstat.st_mode);
+                   msg_perror("cannot change mode of file %s to %ld",
+                              (longname ? longname : head->header.name) + skipcrud,
+                              notumask & (int)hstat.st_mode);
                        }
                }
 
@@ -514,35 +551,38 @@ extract_archive()
        {
                struct stat st1,st2;
 
-               check = link (head->header.linkname,
-                             skipcrud+head->header.name);
+               check = link (longlink ? longlink : head->header.linkname,
+                             (longname ? longname : head->header.name) + skipcrud);
                if (check == 0)
                        break;
-               if (make_dirs(skipcrud+head->header.name))
+               if (make_dirs((longname ? longname : head->header.name) + skipcrud))
                        goto again_link;
                if(f_gnudump && errno==EEXIST)
                        break;
-               if(   stat(head->header.linkname, &st1) == 0
-                  && stat(skipcrud+head->header.name, &st2)==0
+               if(stat(longlink ? longlink : head->header.linkname, &st1) == 0
+                  && stat((longname ? longname : head->header.name) + skipcrud, &st2)==0
                   && st1.st_dev==st2.st_dev
                   && st1.st_ino==st2.st_ino)
                        break;
                msg_perror("Could not link %s to %s",
-                       skipcrud+head->header.name,head->header.linkname);
+                          (longname ? longname : head->header.name) + skipcrud,
+                          longlink ? longlink : longlink, 
+                          head->header.linkname);
        }
                break;
 
 #ifdef S_ISLNK
        case LF_SYMLINK:
        again_symlink:
-               check = symlink(head->header.linkname,
-                               skipcrud+head->header.name);
+                check = symlink(longlink ? longlink : head->header.linkname,
+                                (longname ? longname : head->header.name) + skipcrud);
                /* FIXME, don't worry uid, gid, etc... */
                if (check == 0)
                        break;
-               if (make_dirs(skipcrud+head->header.name))
+               if (make_dirs((longname ? longname : head->header.name) + skipcrud))
                        goto again_symlink;
-               msg_perror("Could not create symlink to %s",head->header.linkname);
+               msg_perror("Could not create symlink to %s",
+                          longlink ? longlink : head->header.linkname);
                break;
 #endif
 
@@ -558,12 +598,16 @@ extract_archive()
 #endif
 #if defined(S_IFCHR) || defined(S_IFBLK)
        make_node:
-               check = mknod(skipcrud+head->header.name,
+               check = mknod((longname ? longname: head->header.name) + skipcrud,
                              (int) hstat.st_mode, (int) hstat.st_rdev);
                if (check != 0) {
-                       if (make_dirs(skipcrud+head->header.name))
+                       if (make_dirs((longname 
+                                     ? longname
+                                     : head->header.name) + skipcrud))
                                goto make_node;
-                       msg_perror("Could not make %s",skipcrud+head->header.name);
+                       msg_perror("Could not make %s",
+                                  (longname ? longname : head->header.name)
+                                  + skipcrud);
                        break;
                };
                goto set_filestat;
@@ -573,24 +617,29 @@ extract_archive()
        /* If local system doesn't support FIFOs, use default case */
        case LF_FIFO:
        make_fifo:
-               check = mkfifo(skipcrud+head->header.name,
+               check = mkfifo((longname ? longname : head->header.name) + skipcrud,
                               (int) hstat.st_mode);
                if (check != 0) {
-                       if (make_dirs(skipcrud+head->header.name))
-                               goto make_fifo;
-                       msg_perror("Could not make %s",skipcrud+head->header.name);
-                       break;
+                 if (make_dirs((longname ? longname : head->header.name) + skipcrud))
+                   goto make_fifo;
+                 msg_perror("Could not make %s",
+                            (longname ? longname : head->header.name) + skipcrud);
+                 break;
                };
-               goto set_filestat;
+                goto set_filestat;
 #endif
 
        case LF_DIR:
        case LF_DUMPDIR:
-               namelen = strlen(skipcrud+head->header.name)-1;
+                namelen = strlen(longname ? longname : head->header.name)
+                   + skipcrud - 1;
        really_dir:
                /* Check for trailing /, and zap as many as we find. */
-               while (namelen && head->header.name[skipcrud+namelen] == '/')
-                       head->header.name[skipcrud+namelen--] = '\0';
+               while (namelen
+                      && (longname 
+                          ? longname
+                          : head->header.name)[skipcrud+namelen] == '/')
+                       (longname ? longname : head->header.name)[skipcrud+namelen--] = '\0';
                if(f_gnudump) {         /* Read the entry and delete files
                                           that aren't listed in the archive */
                        gnu_restore(skipcrud);
@@ -600,23 +649,23 @@ extract_archive()
 
        
        again_dir:
-               check = mkdir(skipcrud+head->header.name,
+               check = mkdir(skipcrud+(longname ? longname : head->header.name),
                              (we_are_root ? 0 : 0300) | (int)hstat.st_mode);
                if (check != 0) {
                        struct stat st1;
 
-                       if (make_dirs(skipcrud+head->header.name))
+                       if (make_dirs(skipcrud+(longname ? longname : head->header.name)))
                                goto again_dir;
                        /* If we're trying to create '.', let it be. */
-                       if (head->header.name[skipcrud+namelen] == '.' && 
+                       if ((longname ? longname : head->header.name)[skipcrud+namelen] == '.' && 
                            (namelen==0 ||
-                            head->header.name[skipcrud+namelen-1]=='/'))
+                            (longname ? longname : head->header.name)[skipcrud+namelen-1]=='/'))
                                goto check_perms;
                        if(   errno==EEXIST
-                          && stat(skipcrud+head->header.name,&st1)==0
+                          && stat(skipcrud+(longname ? longname : head->header.name),&st1)==0
                           && (S_ISDIR(st1.st_mode)))
                                break;
-                       msg_perror("Could not create directory %s",skipcrud+head->header.name);
+                       msg_perror("Could not create directory %s",skipcrud+(longname ? longname : head->header.name));
                        break;
                }
                
@@ -624,14 +673,14 @@ extract_archive()
                if (!we_are_root && 0300 != (0300 & (int) hstat.st_mode)) {
                        hstat.st_mode |= 0300;
                        msg("Added write and execute permission to directory %s",
-                         skipcrud+head->header.name);
+                         skipcrud+(longname ? longname : head->header.name));
                }
 
                if (f_modified)
                  goto set_filestat;
-               tmp = malloc (sizeof (struct saved_dir_info));
-               tmp->path = malloc (strlen (skipcrud + head->header.name) + 1);
-               strcpy (tmp->path, skipcrud + head->header.name);
+               tmp = (struct saved_dir_info *) malloc (sizeof (struct saved_dir_info));
+               tmp->path = malloc (strlen (skipcrud + (longname ? longname : head->header.name)) + 1);
+               strcpy (tmp->path, skipcrud + (longname ? longname : head->header.name));
                tmp->mode = hstat.st_mode;
                tmp->atime = hstat.st_atime;
                tmp->mtime = hstat.st_mtime;
@@ -639,7 +688,7 @@ extract_archive()
                saved_dir_info_head = tmp;
        case LF_VOLHDR:
                if(f_verbose) {
-                       printf("Reading %s\n",head->header.name);
+                       printf("Reading %s\n",longname ? longname : head->header.name);
                }
                break;
 
@@ -656,25 +705,39 @@ extract_archive()
                longp = &longname;
                goto extract_long;
                
-       case LF_LONGLINK
+       case LF_LONGLINK:
                longp = &longlink;
         extract_long:
                
                 if (*longp)
                   free (*longp);
-                *longp = ck_malloc (hstat.st_size);
-                
-                /* This loop is copied from the extract_file label above;
-                   as a result, some of the variable names (like `written')
-                   might be confusing. */
+                bp = *longp = (char *) ck_malloc (hstat.st_size);
+
                 for (size = hstat.st_size;
                      size > 0;
                      size -= written)
                   {
+                    data = findrec ()->charptr;
+                    if (data == NULL)
+                      {
+                        msg ("Unexpected EOF on archive file");
+                        break;
+                      }
+                    written = endofrecs () ->charptr - data;
+                    if (written > size)
+                      written = size;
                     
-
-               
-       }
+                    bcopy (data, bp, written);
+                    bp += written;
+                    userec ((union record *) (data + written - 1));
+                  }
+       }       
+       
+       if (bumplongs)
+         {
+           longname = 0;
+           longlink = 0;
+         }
 
        /* We don't need to save it any longer. */
        saverec((union record **) 0);   /* Unsave it */
@@ -794,28 +857,28 @@ extract_sparse_file(fd, sizeleft, totalsize, name)
 void restore_saved_dir_info ()
 {
   time_t acc_upd_times[2];
-  saved_dir_info *tmp;
+  struct saved_dir_info *tmp;
 
-  while (saved_info_head != NULL)
+  while (saved_dir_info_head != NULL)
     {
       /* fixme if f_gnudump should set ctime too, but how? */
       if(f_gnudump)
-       acc_upd_times[0]=saved_info_head -> atime;
+       acc_upd_times[0]=saved_dir_info_head -> atime;
       else acc_upd_times[0] = now; /* Accessed now */
-      acc_upd_times[1] = saved_info_head -> mtime; /* Mod'd */
-      if (utime(saved_info_head -> path, acc_upd_times) < 0) {
+      acc_upd_times[1] = saved_dir_info_head -> mtime; /* Mod'd */
+      if (utime(saved_dir_info_head -> path, acc_upd_times) < 0) {
        msg_perror("couldn't change access and modification times of %s",
-                  saved_info_head -> path);
+                  saved_dir_info_head -> path);
       }
-      if ((!f_keep) || (saved_info_head -> mode & (S_ISUID|S_ISGID|S_ISVTX)))
+      if ((!f_keep) || (saved_dir_info_head -> mode & (S_ISUID|S_ISGID|S_ISVTX)))
        {
-         if (chmod(saved_info_head -> path,
-                   notumask & saved_info_head -> mode) < 0) {
+         if (chmod(saved_dir_info_head -> path,
+                   notumask & saved_dir_info_head -> mode) < 0) {
            msg_perror("cannot change mode of file %s to %ld",
-                      saved_info_head -> path,
-                      notumask & saved_info_head -> mode);
+                      saved_dir_info_head -> path,
+                      notumask & saved_dir_info_head -> mode);
          }
        }
-      saved_info_head = saved_info_head -> next;
+      saved_dir_info_head = saved_dir_info_head -> next;
     }
 }
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