autofs-5.1.1 - fix out of order call in program map lookup

From: Ian Kent <raven@themaw.net>

Commit 91e42e58b4 fixed a problem with program map environment variable
naming and commit 743deb0e4e added a configuration option to force use
of the old environment names for those who need it and are sure it is
safe to continue to use them.

But the call to get the configuration entry was placed after a fork()
so the state of the mutex used when querying the configuration is
undefined and can lead to a deadlock.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 CHANGELOG                |    1 +
 modules/lookup_program.c |   20 ++++++++++----------
 2 files changed, 11 insertions(+), 10 deletions(-)

--- autofs-5.0.7.orig/CHANGELOG
+++ autofs-5.0.7/CHANGELOG
@@ -181,6 +181,7 @@
 - fix direct mount stale instance flag reset.
 - fix direct map expire not set for initail empty map.
 - update map_hash_table_size description.
+- fix out of order call in program map lookup.
 
 25/07/2012 autofs-5.0.7
 =======================
--- autofs-5.0.7.orig/modules/lookup_program.c
+++ autofs-5.0.7/modules/lookup_program.c
@@ -139,6 +139,16 @@ static char *lookup_one(struct autofs_po
 	}
 
 	/*
+	 * By default use a prefix with standard environment
+	 * variables to prevent system subversion by interpreted
+	 * languages.
+	 */
+	if (defaults_force_std_prog_map_env())
+		prefix = NULL;
+	else
+		prefix = "AUTOFS_";
+
+	/*
 	 * We don't use popen because we don't want to run /bin/sh plus we
 	 * want to send stderr to the syslog, and we don't use spawnl()
 	 * because we need the pipe hooks
@@ -177,16 +187,6 @@ static char *lookup_one(struct autofs_po
 			     ap->path, ctxt->mapname);
 
 		/*
-		 * By default use a prefix with standard environment
-		 * variables to prevent system subversion by interpreted
-		 * languages.
-		 */
-		if (defaults_force_std_prog_map_env())
-			prefix = NULL;
-		else
-			prefix = "AUTOFS_";
-
-		/*
 		 * MAPFMT_DEFAULT must be "sun" for ->parse_init() to have setup
 		 * the macro table.
 		 */