]> Dogcows Code - chaz/tar/blobdiff - src/extract.c
*** empty log message ***
[chaz/tar] / src / extract.c
index ff86642673b3a3575e5057e85875b0081287fbad..8aa5ba03d3cadff173253eb79f46366793629947 100644 (file)
@@ -55,6 +55,12 @@ time_t time();
 
 #if defined(_POSIX_VERSION)
 #include <utime.h>
+#else
+struct utimbuf
+{
+  long actime;
+  long modtime;
+};
 #endif
 
 extern FILE *msg_file;
@@ -100,7 +106,7 @@ 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;
@@ -138,7 +144,7 @@ extract_archive()
        register char *data;
        int fd, check, namelen, written, openflag;
        long size;
-       time_t acc_upd_times[2];
+       struct utimbuf acc_upd_times;
        register int skipcrud;
        register int i;
 /*     int sparse_ind = 0;*/
@@ -146,14 +152,13 @@ extract_archive()
        struct saved_dir_info *tmp;
 /*     int end_nulls; */
        char **longp;
-       static char *longname;
-       static char *longlink;
+       char *bp;
        
        saverec(&head);                 /* Make sure it sticks around */
        userec(head);                   /* And go past it in the archive */
        decode_header(head, &hstat, &head_standard, 1); /* Snarf fields */
 
-       if(f_confirm && !confirm("extract",head->header.name)) {
+       if(f_confirm && !confirm("extract",current_file_name)) {
                if (head->header.isextended)
                        skip_extended_headers();
                skip_file((long)hstat.st_size);
@@ -174,7 +179,8 @@ extract_archive()
         * the header record.
         */
        skipcrud = 0;
-       while (!f_absolute_paths && '/' == head->header.name[skipcrud]) {
+       while (!f_absolute_paths
+              && '/' == current_file_name[skipcrud]) {
                static int warned_once = 0;
 
                skipcrud++;     /* Force relative path */
@@ -187,7 +193,7 @@ extract_archive()
 
         default:
                 msg("Unknown file type '%c' for %s, extracted as normal file",
-                        head->header.linkflag, skipcrud+head->header.name);
+                        head->header.linkflag, skipcrud+current_file_name);
                 /* FALL THRU */
 
         /* 
@@ -266,8 +272,8 @@ extract_archive()
                  * Appears to be a file.
                  * See if it's really a directory.
                  */
-                namelen = strlen(skipcrud+head->header.name)-1;
-                if (head->header.name[skipcrud+namelen] == '/')
+                namelen = strlen(skipcrud+current_file_name)-1;
+                if (current_file_name[skipcrud+namelen] == '/')
                         goto really_dir;
 
                 /* FIXME, deal with protection issues */
@@ -293,37 +299,42 @@ extract_archive()
                         fd = 1;
                         goto extract_file;
                 }
- #ifdef O_CTG
+#ifdef O_CTG
                 /*
                  * Contiguous files (on the Masscomp) have to specify
                  * 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
+#endif
                 {
- #ifdef NO_OPEN3
+#ifdef NO_OPEN3
                         /*
                          * 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);
- #else
+                        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);
- #endif
+                        fd = open(skipcrud + current_file_name,
+                                  openflag, hstat.st_mode);
+#endif
                 }
 
                 if (fd < 0) {
-                        if (make_dirs(skipcrud+head->header.name))
+                        if (make_dirs(skipcrud + current_file_name))
                                 goto again_file;
-                        msg_perror("Could not create file %s",skipcrud+head->header.name);
+                        msg_perror("Could not create file %s",
+                                   skipcrud + current_file_name);
                         if (head->header.isextended)
                                 skip_extended_headers();
                         skip_file((long)hstat.st_size);
@@ -343,12 +354,11 @@ extract_archive()
                          * that happen to contain the filename will look
                          * REAL interesting unless we do this.
                          */
-                        namelen = strlen(skipcrud+head->header.name);
+                        namelen = strlen(skipcrud + current_file_name);
                         name = (char *) malloc((sizeof(char)) * namelen);
-                        bcopy(skipcrud+head->header.name, name, namelen);
+                        bcopy(skipcrud+current_file_name, name, namelen);
                         size = hstat.st_size;
-                        extract_sparse_file(fd, &size, hstat.st_size,
-                                                name);
+                        extract_sparse_file(fd, &size, hstat.st_size, name);
                 }                      
                 else           
                   for (size = hstat.st_size;
@@ -359,7 +369,7 @@ extract_archive()
                                 numbytes;*/
 
                         if(f_multivol) {
-                                save_name=head->header.name;
+                                save_name=current_file_name;
                                 save_totsize=hstat.st_size;
                                 save_sizeleft=size;
                         }
@@ -405,9 +415,11 @@ 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",
+                                           skipcrud + current_file_name);
                         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,skipcrud + current_file_name);
                         skip_file((long)(size - written));
                         break; /* Still do the close, mod time, chmod, etc */
                 }
@@ -444,7 +456,8 @@ extract_archive()
                 }*/
                 check = close(fd);
                 if (check < 0) {
-                        msg_perror("Error while closing %s",skipcrud+head->header.name);
+                        msg_perror("Error while closing %s",
+                                   skipcrud + current_file_name);
                 }
 
 
@@ -457,9 +470,11 @@ 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(skipcrud + current_file_name,
+                                  hstat.st_uid, hstat.st_gid) < 0) {
+                          msg_perror("cannot chown file %s to uid %d gid %d",
+                                     skipcrud + current_file_name,
+                                     hstat.st_uid,hstat.st_gid);
                         }
                 }
 
@@ -473,12 +488,13 @@ extract_archive()
                 if (!f_modified) {
                         /* fixme if f_gnudump should set ctime too, but how? */
                        if(f_gnudump)
-                               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);
+                         acc_upd_times.actime=hstat.st_atime;
+                       else
+                         acc_upd_times.actime = now; /* Accessed now */
+                       acc_upd_times.modtime = hstat.st_mtime; /* Mod'd */
+                       if (utime(skipcrud + current_file_name,
+                                 &acc_upd_times) < 0) {
+                         msg_perror("couldn't change access and modification times of %s",skipcrud + current_file_name);
                        }
                }
                /* We do the utime before the chmod because some versions of
@@ -500,9 +516,11 @@ extract_archive()
                 */
                if ((!f_keep)
                    || (hstat.st_mode & (S_ISUID|S_ISGID|S_ISVTX))) {
-                       if (chmod(skipcrud+head->header.name,
-                                 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);
+                 if (chmod(skipcrud + current_file_name,
+                           notumask & (int)hstat.st_mode) < 0) {
+                   msg_perror("cannot change mode of file %s to %ld",
+                              skipcrud + current_file_name,
+                              notumask & (int)hstat.st_mode);
                        }
                }
 
@@ -514,35 +532,37 @@ extract_archive()
        {
                struct stat st1,st2;
 
-               check = link (head->header.linkname,
-                             skipcrud+head->header.name);
+               check = link (current_link_name, skipcrud + current_file_name);
+
                if (check == 0)
                        break;
-               if (make_dirs(skipcrud+head->header.name))
+               if (make_dirs(skipcrud + current_file_name))
                        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(current_link_name, &st1) == 0
+                  && stat(current_file_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);
+                          skipcrud + current_file_name,
+                          current_link_name);
        }
                break;
 
 #ifdef S_ISLNK
        case LF_SYMLINK:
        again_symlink:
-               check = symlink(head->header.linkname,
-                               skipcrud+head->header.name);
+                check = symlink(current_link_name,
+                                skipcrud + current_file_name);
                /* FIXME, don't worry uid, gid, etc... */
                if (check == 0)
                        break;
-               if (make_dirs(skipcrud+head->header.name))
+               if (make_dirs(current_file_name + skipcrud))
                        goto again_symlink;
-               msg_perror("Could not create symlink to %s",head->header.linkname);
+               msg_perror("Could not create symlink to %s",
+                          current_link_name);
                break;
 #endif
 
@@ -558,12 +578,13 @@ extract_archive()
 #endif
 #if defined(S_IFCHR) || defined(S_IFBLK)
        make_node:
-               check = mknod(skipcrud+head->header.name,
+               check = mknod(current_file_name + skipcrud,
                              (int) hstat.st_mode, (int) hstat.st_rdev);
                if (check != 0) {
-                       if (make_dirs(skipcrud+head->header.name))
+                       if (make_dirs(skipcrud + current_file_name))
                                goto make_node;
-                       msg_perror("Could not make %s",skipcrud+head->header.name);
+                       msg_perror("Could not make %s",
+                                  current_file_name + skipcrud);
                        break;
                };
                goto set_filestat;
@@ -573,24 +594,26 @@ 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(current_file_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(current_file_name + skipcrud))
+                   goto make_fifo;
+                 msg_perror("Could not make %s",
+                            skipcrud + current_file_name);
+                 break;
                };
-               goto set_filestat;
+                goto set_filestat;
 #endif
 
        case LF_DIR:
        case LF_DUMPDIR:
-               namelen = strlen(skipcrud+head->header.name)-1;
+                namelen = strlen(current_file_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
+                      && current_file_name[skipcrud+namelen] == '/')
+                 current_file_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 +623,23 @@ extract_archive()
 
        
        again_dir:
-               check = mkdir(skipcrud+head->header.name,
+               check = mkdir(skipcrud+current_file_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+current_file_name))
                                goto again_dir;
                        /* If we're trying to create '.', let it be. */
-                       if (head->header.name[skipcrud+namelen] == '.' && 
+                       if (current_file_name[skipcrud+namelen] == '.' && 
                            (namelen==0 ||
-                            head->header.name[skipcrud+namelen-1]=='/'))
+                            current_file_name[skipcrud+namelen-1]=='/'))
                                goto check_perms;
                        if(   errno==EEXIST
-                          && stat(skipcrud+head->header.name,&st1)==0
+                          && stat(skipcrud+current_file_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+current_file_name);
                        break;
                }
                
@@ -624,14 +647,14 @@ 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+current_file_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 + current_file_name) + 1);
+               strcpy (tmp->path, skipcrud + current_file_name);
                tmp->mode = hstat.st_mode;
                tmp->atime = hstat.st_atime;
                tmp->mtime = hstat.st_mtime;
@@ -639,7 +662,7 @@ extract_archive()
                saved_dir_info_head = tmp;
        case LF_VOLHDR:
                if(f_verbose) {
-                       printf("Reading %s\n",head->header.name);
+                       printf("Reading %s\n", current_file_name);
                }
                break;
 
@@ -648,34 +671,17 @@ extract_archive()
                break;
 
        case LF_MULTIVOL:
-               msg("Can't extract '%s'--file is continued from another volume\n",head->header.name);
+               msg("Can't extract '%s'--file is continued from another volume\n",current_file_name);
                skip_file((long)hstat.st_size);
                break;
 
        case LF_LONGNAME:
-               longp = &longname;
-               goto extract_long;
-               
-       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. */
-                for (size = hstat.st_size;
-                     size > 0;
-                     size -= written)
-                  {
-                    
-
-               
-       }
-
+       case LF_LONGLINK:
+                msg ("Visible long name error\n");
+                skip_file ((long)hstat.st_size);
+                break;
+       }       
+       
        /* We don't need to save it any longer. */
        saverec((union record **) 0);   /* Unsave it */
 }
@@ -793,29 +799,30 @@ extract_sparse_file(fd, sizeleft, totalsize, name)
 /* Set back the utime and mode for all the extracted directories. */
 void restore_saved_dir_info ()
 {
-  time_t acc_upd_times[2];
-  saved_dir_info *tmp;
+  struct utimbuf acc_upd_times;
+  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;
-      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.actime=saved_dir_info_head -> atime;
+      else 
+       acc_upd_times.actime = now; /* Accessed now */
+      acc_upd_times.modtime = 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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