X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fupdate.c;h=f4a1a9de55e660ad2c08d71b8359c74b32146a92;hb=bc9dc01ec379d8bb74dda3e805818f0c3227e616;hp=98211eeeec63bf237585f93839babc7811265c9f;hpb=6290150c47daea1d034f2293756b623169ad1b9b;p=chaz%2Ftar

diff --git a/src/update.c b/src/update.c
index 98211ee..f4a1a9d 100644
--- a/src/update.c
+++ b/src/update.c
@@ -1,5 +1,5 @@
 /* Update a tar archive.
-   Copyright (C) 1988, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
+   Copyright 1988, 1992, 1994, 1996, 1997, 1999 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
@@ -30,7 +30,7 @@ extern union block *current_block;
 /* We've hit the end of the old stuff, and its time to start writing new
    stuff to the tape.  This involves seeking back one record and
    re-writing the current record (which has been changed).  */
-int time_to_start_writing = 0;
+int time_to_start_writing;
 
 /* Pointer to where we started to write in the first record we write out.
    This is used if we can't backspace the output and have to null out the
@@ -45,52 +45,50 @@ char *output_start;
 static void
 append_file (char *path)
 {
-  int handle;
+  int handle = open (path, O_RDONLY | O_BINARY);
   struct stat stat_data;
-  off_t bytes_left;
 
-  if (stat (path, &stat_data) != 0
-      || (handle = open (path, O_RDONLY | O_BINARY), handle < 0))
+  if (handle < 0)
     {
       ERROR ((0, errno, _("Cannot open file %s"), path));
       return;
     }
 
-  bytes_left = stat_data.st_size;
-
-  while (bytes_left > 0)
+  if (fstat (handle, &stat_data) != 0)
+    ERROR ((0, errno, "%s", path));
+  else
     {
-      union block *start = find_next_block ();
-      size_t buffer_size = available_space_after (start);
-      ssize_t status;
-
-      if (bytes_left < buffer_size)
-	{
-	  buffer_size = bytes_left;
-	  status = buffer_size % BLOCKSIZE;
-	  if (status)
-	    memset (start->buffer + bytes_left, 0,
-		    (size_t) (BLOCKSIZE - status));
-	}
+      off_t bytes_left = stat_data.st_size;
 
-      status = full_read (handle, start->buffer, buffer_size);
-      if (status < 0)
+      while (bytes_left > 0)
 	{
+	  union block *start = find_next_block ();
+	  size_t buffer_size = available_space_after (start);
+	  ssize_t status;
 	  char buf[UINTMAX_STRSIZE_BOUND];
-	  FATAL_ERROR ((0, errno,
-			_("Read error at byte %s reading %lu bytes in file %s"),
-			STRINGIFY_BIGINT (stat_data.st_size - bytes_left, buf),
-			(unsigned long) buffer_size, path));
-	}
-      bytes_left -= status;
 
-      set_next_block_after (start + (status - 1) / BLOCKSIZE);
+	  if (bytes_left < buffer_size)
+	    {
+	      buffer_size = bytes_left;
+	      status = buffer_size % BLOCKSIZE;
+	      if (status)
+		memset (start->buffer + bytes_left, 0, BLOCKSIZE - status);
+	    }
+
+	  status = safe_read (handle, start->buffer, buffer_size);
+	  if (status < 0)
+	    FATAL_ERROR ((0, errno,
+			  _("Read error at byte %s reading %lu bytes in file %s"),
+			  STRINGIFY_BIGINT (stat_data.st_size - bytes_left,
+					    buf),
+			  (unsigned long) buffer_size, path));
+	  if (status == 0)
+	    FATAL_ERROR ((0, 0, _("%s: File shrunk by %s bytes, (yark!)"),
+			  path, STRINGIFY_BIGINT (bytes_left, buf)));
 
-      if (status != buffer_size)
-	{
-	  char buf[UINTMAX_STRSIZE_BOUND];
-	  FATAL_ERROR ((0, 0, _("%s: File shrunk by %s bytes, (yark!)"),
-			path, STRINGIFY_BIGINT (bytes_left, buf)));
+	  bytes_left -= status;
+
+	  set_next_block_after (start + (status - 1) / BLOCKSIZE);
 	}
     }
 
@@ -110,8 +108,6 @@ update_archive (void)
   int found_end = 0;
 
   name_gather ();
-  if (subcommand_option == UPDATE_SUBCOMMAND)
-    name_expand ();
   open_archive (ACCESS_UPDATE);
 
   while (!found_end)
@@ -130,14 +126,14 @@ update_archive (void)
 	    if (subcommand_option == UPDATE_SUBCOMMAND
 		&& (name = name_scan (current_file_name), name))
 	      {
-		struct stat stat_data;
+		struct stat s;
 		enum archive_format unused;
 
 		decode_header (current_header, &current_stat, &unused, 0);
-		if (stat (current_file_name, &stat_data) < 0)
-		  ERROR ((0, errno, _("Cannot stat %s"), current_file_name));
-		else if (current_stat.st_mtime >= stat_data.st_mtime)
-		  name->found = 1;
+		chdir_do (name->change_dir);
+		if (deref_stat (dereference_option, current_file_name, &s) == 0
+		    && s.st_mtime <= current_stat.st_mtime)
+		  add_avoided_name (current_file_name);
 	      }
 	    set_next_block_after (current_header);
 	    if (current_header->oldgnu_header.isextended)
@@ -189,12 +185,14 @@ update_archive (void)
 
     while (path = name_from_list (), path)
       {
+	if (excluded_name (path))
+	  continue;
 	if (interactive_option && !confirm ("add", path))
 	  continue;
 	if (subcommand_option == CAT_SUBCOMMAND)
 	  append_file (path);
 	else
-	  dump_file (path, (dev_t) -1, 1);
+	  dump_file (path, 1, (dev_t) 0);
       }
   }