tar: change interdir_made from int to bool

[chaz/tar] / src / extract.c

diff --git a/src/extract.c b/src/extract.c
index 3c92e53d6d1e3f686e939c419e0df03159bb480b..0ad5545426d611ae6cd88058cb171395fb4ead81 100644 (file)
--- a/src/extract.c
+++ b/src/extract.c
@@ -1,7 +1,7 @@
 /* Extract files from a tar archive.
 
    Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000,
-   2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   2001, 2003, 2004, 2005, 2006, 2007, 2010 Free Software Foundation, Inc.
 
    Written by John Gilmore, on 1985-11-19.
 
@@ -23,7 +23,6 @@
 #include <quotearg.h>
 #include <utimens.h>
 #include <errno.h>
-#include <xgetcwd.h>
 #include <priv-set.h>
 
 #include "common.h"
@@ -146,7 +145,7 @@ set_mode (char const *file_name,
 {
   mode_t mode;
   bool failed;
-  
+
   if (0 < same_permissions_option
       && permstatus != INTERDIR_PERMSTATUS)
     {
@@ -516,7 +515,7 @@ file_newer_p (const char *file_name, struct tar_stat_info *tar_stat)
    properly restored on returning RECOVER_NO.  */
 
 static int
-maybe_recoverable (char *file_name, int *interdir_made)
+maybe_recoverable (char *file_name, bool *interdir_made)
 {
   int e = errno;
 
@@ -561,7 +560,7 @@ maybe_recoverable (char *file_name, int *interdir_made)
          errno = ENOENT;
          return RECOVER_NO;
        }
-      *interdir_made = 1;
+      *interdir_made = true;
       return RECOVER_OK;
 
     default:
@@ -642,19 +641,17 @@ extract_dir (char *file_name, int typeflag)
 {
   int status;
   mode_t mode;
-  int interdir_made = 0;
+  bool interdir_made = false;
 
   /* Save 'root device' to avoid purging mount points. */
   if (one_file_system_option && root_device == 0)
     {
       struct stat st;
-      char *dir = xgetcwd ();
 
-      if (deref_stat (true, dir, &st))
-       stat_diag (dir);
+      if (stat (".", &st) != 0)
+       stat_diag (".");
       else
        root_device = st.st_dev;
-      free (dir);
     }
 
   if (incremental_option)
@@ -775,7 +772,7 @@ extract_file (char *file_name, int typeflag)
   int status;
   size_t count;
   size_t written;
-  int interdir_made = 0;
+  bool interdir_made = false;
   mode_t mode = current_stat_info.stat.st_mode & MODE_RWX & ~ current_umask;
   mode_t invert_permissions =
     0 < same_owner_option ? mode & (S_IRWXG | S_IRWXO) : 0;
@@ -812,7 +809,7 @@ extract_file (char *file_name, int typeflag)
        }
     }
 
-  mv_begin (&current_stat_info);
+  mv_begin_read (&current_stat_info);
   if (current_stat_info.is_sparse)
     sparse_extract_file (fd, &current_stat_info, &size);
   else
@@ -882,18 +879,28 @@ extract_file (char *file_name, int typeflag)
    process.  */
 
 static int
-create_placeholder_file (char *file_name, bool is_symlink, int *interdir_made)
+create_placeholder_file (char *file_name, bool is_symlink, bool *interdir_made)
 {
   int fd;
   struct stat st;
 
   while ((fd = open (file_name, O_WRONLY | O_CREAT | O_EXCL, 0)) < 0)
-    if (! maybe_recoverable (file_name, interdir_made))
-      break;
+    {
+      switch (maybe_recoverable (file_name, interdir_made))
+       {
+       case RECOVER_OK:
+         continue;
+
+       case RECOVER_SKIP:
+         return 0;
+
+       case RECOVER_NO:
+         open_error (file_name);
+         return -1;
+       }
+      }
 
-  if (fd < 0)
-    open_error (file_name);
-  else if (fstat (fd, &st) != 0)
+  if (fstat (fd, &st) != 0)
     {
       stat_error (file_name);
       close (fd);
@@ -954,11 +961,12 @@ create_placeholder_file (char *file_name, bool is_symlink, int *interdir_made)
 static int
 extract_link (char *file_name, int typeflag)
 {
-  int interdir_made = 0;
+  bool interdir_made = false;
   char const *link_name;
+  int rc;
 
   link_name = current_stat_info.link_name;
-  
+
   if (! absolute_names_option && contains_dot_dot (link_name))
     return create_placeholder_file (file_name, false, &interdir_made);
 
@@ -996,8 +1004,10 @@ extract_link (char *file_name, int typeflag)
 
       errno = e;
     }
-  while (maybe_recoverable (file_name, &interdir_made));
+  while ((rc = maybe_recoverable (file_name, &interdir_made)) == RECOVER_OK);
 
+  if (rc == RECOVER_SKIP)
+    return 0;
   if (!(incremental_option && errno == EEXIST))
     {
       link_error (link_name, file_name);
@@ -1010,23 +1020,29 @@ static int
 extract_symlink (char *file_name, int typeflag)
 {
 #ifdef HAVE_SYMLINK
-  int status;
-  int interdir_made = 0;
+  bool interdir_made = false;
 
   if (! absolute_names_option
       && (IS_ABSOLUTE_FILE_NAME (current_stat_info.link_name)
          || contains_dot_dot (current_stat_info.link_name)))
     return create_placeholder_file (file_name, true, &interdir_made);
 
-  while ((status = symlink (current_stat_info.link_name, file_name)))
-    if (!maybe_recoverable (file_name, &interdir_made))
-      break;
+  while (symlink (current_stat_info.link_name, file_name))
+    switch (maybe_recoverable (file_name, &interdir_made))
+      {
+      case RECOVER_OK:
+       continue;
 
-  if (status == 0)
-    set_stat (file_name, &current_stat_info, NULL, 0, 0, SYMTYPE);
-  else
-    symlink_error (current_stat_info.link_name, file_name);
-  return status;
+      case RECOVER_SKIP:
+       return 0;
+
+      case RECOVER_NO:
+       symlink_error (current_stat_info.link_name, file_name);
+       return -1;
+      }
+
+  set_stat (file_name, &current_stat_info, NULL, 0, 0, SYMTYPE);
+  return 0;
 
 #else
   static int warned_once;
@@ -1046,23 +1062,29 @@ extract_symlink (char *file_name, int typeflag)
 static int
 extract_node (char *file_name, int typeflag)
 {
-  int status;
-  int interdir_made = 0;
+  bool interdir_made = false;
   mode_t mode = current_stat_info.stat.st_mode & ~ current_umask;
   mode_t invert_permissions =
     0 < same_owner_option ? mode & (S_IRWXG | S_IRWXO) : 0;
 
-  do
-    status = mknod (file_name, mode ^ invert_permissions,
-                   current_stat_info.stat.st_rdev);
-  while (status && maybe_recoverable (file_name, &interdir_made));
+  while (mknod (file_name, mode ^ invert_permissions,
+               current_stat_info.stat.st_rdev))
+    switch (maybe_recoverable (file_name, &interdir_made))
+      {
+      case RECOVER_OK:
+       continue;
 
-  if (status != 0)
-    mknod_error (file_name);
-  else
-    set_stat (file_name, &current_stat_info, NULL, invert_permissions,
-             ARCHIVED_PERMSTATUS, typeflag);
-  return status;
+      case RECOVER_SKIP:
+       return 0;
+
+      case RECOVER_NO:
+       mknod_error (file_name);
+       return -1;
+      }
+
+  set_stat (file_name, &current_stat_info, NULL, invert_permissions,
+           ARCHIVED_PERMSTATUS, typeflag);
+  return 0;
 }
 #endif
 
@@ -1071,29 +1093,34 @@ static int
 extract_fifo (char *file_name, int typeflag)
 {
   int status;
-  int interdir_made = 0;
+  bool interdir_made = false;
   mode_t mode = current_stat_info.stat.st_mode & ~ current_umask;
   mode_t invert_permissions =
     0 < same_owner_option ? mode & (S_IRWXG | S_IRWXO) : 0;
 
   while ((status = mkfifo (file_name, mode)) != 0)
-    if (!maybe_recoverable (file_name, &interdir_made))
-      break;
+    switch (maybe_recoverable (file_name, &interdir_made))
+      {
+      case RECOVER_OK:
+       continue;
 
-  if (status == 0)
-    set_stat (file_name, &current_stat_info, NULL, invert_permissions,
-             ARCHIVED_PERMSTATUS, typeflag);
-  else
-    mkfifo_error (file_name);
-  return status;
+      case RECOVER_SKIP:
+       return 0;
+
+      case RECOVER_NO:
+       mkfifo_error (file_name);
+       return -1;
+      }
+
+  set_stat (file_name, &current_stat_info, NULL, invert_permissions,
+           ARCHIVED_PERMSTATUS, typeflag);
+  return 0;
 }
 #endif
 
 static int
 extract_volhdr (char *file_name, int typeflag)
 {
-  if (verbose_option)
-    fprintf (stdlis, _("Reading %s\n"), quote (current_stat_info.file_name));
   skip_member ();
   return 0;
 }
@@ -1242,11 +1269,13 @@ extract_archive (void)
   char typeflag;
   tar_extractor_t fun;
 
+  fatal_exit_hook = extract_finish;
+
   /* Try to disable the ability to unlink a directory.  */
   priv_set_remove_linkdir ();
 
   set_next_block_after (current_header);
-  decode_header (current_header, &current_stat_info, &current_format, 1);
+
   if (!current_stat_info.file_name[0]
       || (interactive_option
          && !confirm ("extract", current_stat_info.file_name)))
@@ -1257,7 +1286,7 @@ extract_archive (void)
 
   /* Print the block from current_header and current_stat.  */
   if (verbose_option)
-    print_header (&current_stat_info, -1);
+    print_header (&current_stat_info, current_header, -1);
 
   /* Restore stats for all non-ancestor directories, unless
      it is an incremental archive.
@@ -1406,18 +1435,3 @@ rename_directory (char *src, char *dst)
     }
   return true;
 }
-
-void
-fatal_exit (void)
-{
-  extract_finish ();
-  error (TAREXIT_FAILURE, 0, _("Error is not recoverable: exiting now"));
-  abort ();
-}
-
-void
-xalloc_die (void)
-{
-  error (0, 0, "%s", _("memory exhausted"));
-  fatal_exit ();
-}