File patch-2.5.9-cat_if_device.diff of Package patch

Index: patch-2.5.9/patch.c
===================================================================
--- patch-2.5.9.orig/patch.c
+++ patch-2.5.9/patch.c
@@ -444,7 +444,7 @@ main (int argc, char **argv)
 		  {
 		    move_file (TMPREJNAME, &TMPREJNAME_needs_removal,
 			       rej, instat.st_mode, false);
-		    if (! inerrno
+		    if (! inerrno && !s_is_chrblkfifosock(rej)
 			&& (chmod (rej, (instat.st_mode
 					 & ~(S_IXUSR|S_IXGRP|S_IXOTH)))
 			    != 0))
Index: patch-2.5.9/util.c
===================================================================
--- patch-2.5.9.orig/util.c
+++ patch-2.5.9/util.c
@@ -65,6 +65,49 @@ static bool fid_search (const char *, co
    FROM_NEEDS_REMOVAL must be nonnull if FROM is nonnull.
    Back up TO if BACKUP is true.  */
 
+int
+s_is_chrblkfifosock (const char *path)
+{
+  int r;
+  struct stat st;
+
+  r = stat(path, &st);
+  if (r < 0)
+    return r;
+
+  return (((st.st_mode & S_IFMT) == S_IFCHR) ||
+	  ((st.st_mode & S_IFMT) == S_IFBLK) ||
+	  ((st.st_mode & S_IFMT) == S_IFIFO) ||
+	  ((st.st_mode & S_IFMT) == S_IFSOCK));
+}
+
+void
+cat_file_to_dev (const char *from, const char *to)
+{
+  size_t i;
+  int fromfd, tofd;
+
+  fromfd = open(from, O_RDONLY);
+  if (fromfd < 0)
+    pfatal("could not open %s for reading", quotearg(from));
+
+  tofd = open(to, O_WRONLY | O_NONBLOCK);
+  if (tofd < 0)
+    pfatal("could not open %s for writing", quotearg(to));
+
+  while ((i = read (fromfd, buf, bufsize)) != 0)
+    {
+      if (i == (size_t) -1)
+	read_fatal ();
+      if (write (tofd, buf, i) != i)
+	write_fatal ();
+    }
+  if (close (fromfd) != 0)
+    read_fatal ();
+  if (close (tofd) != 0)
+    write_fatal ();
+}
+
 void
 move_file (char const *from, int volatile *from_needs_removal,
 	   char *to, mode_t mode, bool backup)
@@ -165,6 +208,13 @@ move_file (char const *from, int volatil
 		goto rename_succeeded;
 	    }
 
+	  if (errno == EACCES && (s_is_chrblkfifosock(to) > 0))
+	    {
+	      cat_file_to_dev (from, to);
+	      unlink(from);
+	      return;
+	    }
+
 	  if (errno == EXDEV)
 	    {
 	      if (! backup)
Index: patch-2.5.9/util.h
===================================================================
--- patch-2.5.9.orig/util.h
+++ patch-2.5.9/util.h
@@ -57,3 +57,4 @@ void remove_prefix (char *, size_t);
 void removedirs (char *);
 void set_signals (bool);
 void write_fatal (void) __attribute__ ((noreturn));
+int s_is_chrblkfifosock (const char *);