X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fxheader.c;h=8f727a9a5eb1c24f7179aad6e935b9180df5eec7;hb=1ebdd88cafa5083c11d618af5c8a0f5fe8ecb111;hp=493a955c49ff0c7e8df62d613243e4dea4cc188d;hpb=3eec6b3f46142145eca8738473e16e42f7d403e4;p=chaz%2Ftar

diff --git a/src/xheader.c b/src/xheader.c
index 493a955..8f727a9 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -225,10 +225,11 @@ xheader_set_option (char *string)
                               to the result of the basename
                               utility on the translated file name.
      %p                       The process ID of the pax process.
+     %n                       The value of the 3rd argument.  
      %%                       A '%' character. */
 
-static char *
-xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n)
+char *
+xheader_format_name (struct tar_stat_info *st, const char *fmt, size_t n)
 {
   char *buf;
   size_t len = strlen (fmt);
@@ -254,7 +255,7 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n)
 	    {
 	      dir = safer_name_suffix (dir_name (st->orig_file_name),
 	                               false, absolute_names_option);
-	      len += strlen (dir) - 1;
+	      len += strlen (dir) - 2;
 	    }
 	  break;
 
@@ -262,21 +263,18 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n)
 	  if (st)
 	    {
 	      base = base_name (st->orig_file_name);
-	      len += strlen (base) - 1;
+	      len += strlen (base) - 2;
 	    }
 	  break;
 
 	case 'p':
 	  pptr = umaxtostr (getpid (), pidbuf);
-	  len += pidbuf + sizeof pidbuf - 1 - pptr - 1;
+	  len += pidbuf + sizeof pidbuf - 1 - pptr - 2;
 	  break;
 
 	case 'n':
-	  if (allow_n)
-	    {
-	      nptr = umaxtostr (global_header_count + 1, nbuf);
-	      len += nbuf + sizeof nbuf - 1 - nptr - 1;
-	    }
+	  nptr = umaxtostr (n, nbuf);
+	  len += nbuf + sizeof nbuf - 1 - nptr - 2;
 	  break;
 	}
       p++;
@@ -316,6 +314,7 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n)
 		{
 		  q = stpcpy (q, nptr);
 		  p += 2;
+		  break;
 		}
 	      /* else fall through */
 
@@ -341,7 +340,7 @@ xheader_xhdr_name (struct tar_stat_info *st)
 {
   if (!exthdr_name)
     assign_string (&exthdr_name, "%d/PaxHeaders.%p/%f");
-  return xheader_format_name (st, exthdr_name, false);
+  return xheader_format_name (st, exthdr_name, 0);
 }
 
 #define GLOBAL_HEADER_TEMPLATE "/GlobalHead.%p.%n"
@@ -361,7 +360,7 @@ xheader_ghdr_name (void)
       strcat(globexthdr_name, GLOBAL_HEADER_TEMPLATE);
     }
 
-  return xheader_format_name (NULL, globexthdr_name, true);
+  return xheader_format_name (NULL, globexthdr_name, global_header_count + 1);
 }
 
 void
@@ -396,6 +395,9 @@ xheader_write (char type, char *name, struct xheader *xhdr)
     }
   while (size > 0);
   xheader_destroy (xhdr);
+
+  if (type == XGLTYPE)
+    global_header_count++;
 }
 
 void
@@ -414,7 +416,6 @@ xheader_write_global (void)
   xheader_write (XGLTYPE, name = xheader_ghdr_name (),
 		 &extended_header);
   free (name);
-  global_header_count++;
 }
 
 
@@ -1285,6 +1286,60 @@ dumpdir_decoder (struct tar_stat_info *st, char const *arg,
   memcpy (st->dumpdir, arg, size);
 }
 
+static void
+volume_label_coder (struct tar_stat_info const *st, char const *keyword,
+		    struct xheader *xhdr, void const *data)
+{
+  code_string (data, keyword, xhdr);
+}
+
+static void
+volume_label_decoder (struct tar_stat_info *st, char const *arg, size_t size)
+{
+  decode_string (&volume_label, arg);
+}
+
+static void
+volume_size_coder (struct tar_stat_info const *st, char const *keyword,
+		   struct xheader *xhdr, void const *data)
+{
+  off_t v = *(off_t*)data;
+  code_num (v, keyword, xhdr);
+}
+
+static void
+volume_size_decoder (struct tar_stat_info *st, char const *arg, size_t size)
+{
+  uintmax_t u;
+  if (decode_num (&u, arg, TYPE_MAXIMUM (uintmax_t), "GNU.volume.size"))
+    continued_file_size = u;
+}
+
+/* FIXME: Merge with volume_size_coder */
+static void
+volume_offset_coder (struct tar_stat_info const *st, char const *keyword,
+		     struct xheader *xhdr, void const *data)
+{
+  off_t v = *(off_t*)data;
+  code_num (v, keyword, xhdr);
+}
+
+static void
+volume_offset_decoder (struct tar_stat_info *st, char const *arg, size_t size)
+{
+  uintmax_t u;
+  if (decode_num (&u, arg, TYPE_MAXIMUM (uintmax_t), "GNU.volume.offset"))
+    continued_file_offset = u;
+}
+
+static void
+volume_filename_decoder (struct tar_stat_info *st, char const *arg,
+			 size_t size)
+{
+  decode_string (&continued_file_name, arg);
+}
+  
+
 struct xhdr_tab const xhdr_tab[] = {
   { "atime",	atime_coder,	atime_decoder,	  false },
   { "comment",	dummy_coder,	dummy_decoder,	  false },
@@ -1318,11 +1373,9 @@ struct xhdr_tab const xhdr_tab[] = {
   { "GNU.dumpdir",           dumpdir_coder, dumpdir_decoder,
     true },
 
-#if 0 /* GNU private keywords (not yet implemented) */
-
-  /* Keeps the tape/volume header. May be present only in the global headers.
+  /* Keeps the tape/volume label. May be present only in the global headers.
      Equivalent to GNUTYPE_VOLHDR.  */
-  { "GNU.volume.header", volume_header_coder, volume_header_decoder, false },
+  { "GNU.volume.label", volume_label_coder, volume_label_decoder, true },
 
   /* These may be present in a first global header of the archive.
      They provide the same functionality as GNUTYPE_MULTIVOL header.
@@ -1330,9 +1383,10 @@ struct xhdr_tab const xhdr_tab[] = {
      otherwise kept in the size field of a multivolume header.  The
      GNU.volume.offset keeps the offset of the start of this volume,
      otherwise kept in oldgnu_header.offset.  */
-  { "GNU.volume.size", volume_size_coder, volume_size_decoder, false },
-  { "GNU.volume.offset", volume_offset_coder, volume_offset_decoder, false },
-#endif
+  { "GNU.volume.filename", volume_label_coder, volume_filename_decoder,
+    true },
+  { "GNU.volume.size", volume_size_coder, volume_size_decoder, true },
+  { "GNU.volume.offset", volume_offset_coder, volume_offset_decoder, true },
 
   { NULL, NULL, NULL, false }
 };