From 0374500735b4f9b94fb2d9b5ce8b519c765cd259 Mon Sep 17 00:00:00 2001
From: "Lucas C. Villa Real" <lucasvr@gmail.com>
Date: Thu, 19 Jan 2017 15:07:55 -0200
Subject: [PATCH] Include support for watching symlinks.

---
 config/listener.conf |  5 +----
 src/listener.c       | 11 ++++++++---
 src/listener.h       |  5 +++--
 src/rules.c          |  2 ++
 4 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/config/listener.conf b/config/listener.conf
index b409a3d..8f39615 100644
--- a/config/listener.conf
+++ b/config/listener.conf
@@ -1,11 +1,10 @@
-#
 # Syntax:
 # {
 #   TARGET          = Directory to monitor
 #   WATCHES         = Events to monitor (ACCESS, MODIFY, ATTRIB, CLOSE_WRITE, CLOSE_NOWRITE,
 #                     OPEN, MOVED_FROM, MOVED_TO, CREATE, DELETE, DELETE_SELF and/or MOVE_SELF)
 #   SPAWN           = Program to spawn. $ENTRY holds the pathname being processed
-#   LOOKAT          = What to monitor in the target directory (FILES, DIRS)
+#   LOOKAT          = What to monitor in the target directory (FILES, DIRS, SYMLINKS)
 #   ACCEPT_REGEX    = Regex to limit the kind of FILES/DIRS that the rule cares about
 #   RECURSIVE_DEPTH = Describes how many levels to descend in TARGET applying the same rule. 
 #                     Minimum value is 0 and maximum is 127.
@@ -13,7 +12,6 @@
 #
 # NOTE: The parser expects the entries to be entered in the following sequence:
 # TARGET, WATCHES, SPAWN, LOOKAT, ACCEPT_REGEX and RECURSIVE_DEPTH.
-#
 
 # Removes broken links when a version directory under /Programs is deleted.
 {
@@ -44,4 +42,3 @@
 #	ACCEPT_REGEX    = ^[-+_[:alnum:]]+--[-.+_[:alnum:]]+--(i386|i686|ppc|arm920t)\.tar\.bz2$
 #	RECURSIVE_DEPTH = 1
 #}
-
diff --git a/src/listener.c b/src/listener.c
index 0733207..5cbb093 100644
--- a/src/listener.c
+++ b/src/listener.c
@@ -246,12 +246,17 @@ handle_events(struct inotify_event *ev)
 		}
 
 		if (FILTER_DIRS(di->filter) && !FILTER_FILES(di->filter) && !S_ISDIR(status.st_mode)) {
-			debug_printf("watch descriptor %d listens for DIRS rules, but event happened in another kind of object\n", di->wd);
+			debug_printf("watch descriptor %d listens for DIRS, but event happened in another kind of object\n", di->wd);
 			goto cleanup;
 		}
-		
+
 		if (FILTER_FILES(di->filter) && !FILTER_DIRS(di->filter) && !S_ISREG(status.st_mode)) {
-			debug_printf("watch descriptor %d listens for FILES rules, but event happened in another kind of object\n", di->wd);
+			debug_printf("watch descriptor %d listens for FILES, but event happened in another kind of object\n", di->wd);
+			goto cleanup;
+		}
+
+		if (FILTER_FILES(di->filter) && !FILTER_SYMLINKS(di->filter) && !S_ISLNK(status.st_mode)) {
+			debug_printf("watch descriptor %d listens for SYMLINKS, but event happened in another kind of object\n", di->wd);
 			goto cleanup;
 		}
 
diff --git a/src/listener.h b/src/listener.h
index 1f1776b..0b36314 100644
--- a/src/listener.h
+++ b/src/listener.h
@@ -54,8 +54,9 @@
 #define LISTENER_RULES  SYSCONFDIR"/listener.conf"
 #define EMPTY_MASK      0
 
-#define FILTER_DIRS(m)  S_ISDIR(m)
-#define FILTER_FILES(m) S_ISREG(m)
+#define FILTER_DIRS(m)     S_ISDIR(m)
+#define FILTER_FILES(m)    S_ISREG(m)
+#define FILTER_SYMLINKS(m) S_ISLNK(m)
 
 #define MAX_RECUSIVE_DEPTH	127
 
diff --git a/src/rules.c b/src/rules.c
index 23fc812..4bc7f87 100644
--- a/src/rules.c
+++ b/src/rules.c
@@ -332,6 +332,8 @@ assign_rules(char *config_file, int *retval)
 			di->filter = S_IFDIR;
 		else if (! strcasecmp(token, "FILES"))
 			di->filter = S_IFREG;
+		else if (! strcasecmp(token, "SYMLINKS"))
+			di->filter = S_IFLNK;
 		else {
 			fprintf(stderr, "Error on rule #%d: invalid LOOKAT option %s\n", i+1, token);
 			free(token);