ChangeLog:

	* configure.ac [AC_CHECK_FUNCS]: Check for readlink.
	* config.in, configure: Regenerate.

	* target.h (struct target_ops): Add to_fileio_readlink.
	(target_fileio_readlink): Add prototype.
	* target.c (target_fileio_readlink): New function.

	* inf-child.c: Conditionally include <sys/param.h>.
	(inf_child_fileio_readlink): New function.
	(inf_child_target): Install it.

	* remote.c (PACKET_vFile_readlink): New enum value.
	(remote_hostio_readlink): New function.
	(init_remote_ops): Install it.
	(_initialize_remote): Handle vFile:readlink packet type.

doc/ChangeLog:

	* gdb.texinfo (Remote Configuration): Document
	"set remote hostio-readlink-packet" command.
	(General Query Packets): Document vFile:readlink packet.

gdbserver/ChangeLog:

	* hostio.c (handle_readlink): New function.
	(handle_vFile): Call it to handle "vFile:readlink" packets.

1 files changed, 27 insertions, 0 deletions

diff --git a/gdb/target.c b/gdb/target.c
index 595c2ce..32260e1 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -3318,6 +3318,33 @@ target_fileio_unlink (const char *filename, int *target_errno)
   return -1;
 }
 
+/* Read value of symbolic link FILENAME on the target.  Return a
+   null-terminated string allocated via xmalloc, or NULL if an error
+   occurs (and set *TARGET_ERRNO).  */
+char *
+target_fileio_readlink (const char *filename, int *target_errno)
+{
+  struct target_ops *t;
+
+  for (t = default_fileio_target (); t != NULL; t = t->beneath)
+    {
+      if (t->to_fileio_readlink != NULL)
+	{
+	  char *ret = t->to_fileio_readlink (filename, target_errno);
+
+	  if (targetdebug)
+	    fprintf_unfiltered (gdb_stdlog,
+				"target_fileio_readlink (%s) = %s (%d)\n",
+				filename, ret? ret : "(nil)",
+				ret? 0 : *target_errno);
+	  return ret;
+	}
+    }
+
+  *target_errno = FILEIO_ENOSYS;
+  return NULL;
+}
+
 static void
 target_fileio_close_cleanup (void *opaque)
 {