From a88a177f991527e545e75588013afd16c647e656 Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Thu, 3 Jul 2008 13:11:47 +0000
Subject: Add older_than function to complement newer_than function. Also make
 the userland instance reversed to be compatable with current baselayout,
 which truely does suck.

---
 src/librc/librc-depend.c | 42 +++++++++++++++++++++++++++++++-----------
 src/librc/librc.h        |  1 +
 src/librc/rc.h.in        |  5 +++++
 src/librc/rc.map         |  1 +
 4 files changed, 38 insertions(+), 11 deletions(-)

(limited to 'src/librc')

diff --git a/src/librc/librc-depend.c b/src/librc/librc-depend.c
index 5b7de424..145bdde6 100644
--- a/src/librc/librc-depend.c
+++ b/src/librc/librc-depend.c
@@ -553,12 +553,12 @@ rc_deptree_order(const RC_DEPTREE *deptree, const char *runlevel, int options)
 }
 librc_hidden_def(rc_deptree_order)
 
-bool
-rc_newer_than(const char *source, const char *target)
+static bool
+mtime_check(const char *source, const char *target, bool newer)
 {
 	struct stat buf;
 	time_t mtime;
-	bool newer = true;
+	bool retval = true;
 	DIR *dp;
 	struct dirent *d;
 	char path[PATH_MAX];
@@ -569,32 +569,52 @@ rc_newer_than(const char *source, const char *target)
 		return false;
 	mtime = buf.st_mtime;
 
-	/* Of course we are newer than targets that don't exist
-	   such as broken symlinks */
+	/* If target does not exist, return true to mimic shell test */
 	if (stat(target, &buf) != 0)
 		return true;
-	if (mtime < buf.st_mtime)
-		return false;
+
+	if (newer) {
+		if (mtime < buf.st_mtime)
+			return false;
+	} else {
+		if (mtime > buf.st_mtime)
+			return false;
+	}
+
 	/* If not a dir then reset errno */
 	if (!(dp = opendir(target))) {
 		errno = serrno;
 		return true;
 	}
 
-	/* Check if we're newer than all the entries in the dir */
+	/* Check all the entries in the dir */
 	while ((d = readdir(dp))) {
 		if (d->d_name[0] == '.')
 			continue;
 		snprintf(path, sizeof(path), "%s/%s", target, d->d_name);
-		newer = rc_newer_than(source, path);
-		if (! newer)
+		retval = mtime_check(source, path, newer);
+		if (!retval)
 			break;
 	}
 	closedir(dp);
-	return newer;
+	return retval;
+}
+
+bool
+rc_newer_than(const char *source, const char *target)
+{
+
+	return mtime_check(source, target, true);
 }
 librc_hidden_def(rc_newer_than)
 
+bool
+rc_older_than(const char *source, const char *target)
+{
+	return mtime_check(source, target, false);
+}
+librc_hidden_def(rc_older_than)
+
 typedef struct deppair
 {
 	const char *depend;
diff --git a/src/librc/librc.h b/src/librc/librc.h
index 353b5923..e75ebec1 100644
--- a/src/librc/librc.h
+++ b/src/librc/librc.h
@@ -86,6 +86,7 @@ librc_hidden_proto(rc_deptree_update_needed)
 librc_hidden_proto(rc_find_pids)
 librc_hidden_proto(rc_getline)
 librc_hidden_proto(rc_newer_than)
+librc_hidden_proto(rc_older_than)
 librc_hidden_proto(rc_runlevel_exists)
 librc_hidden_proto(rc_runlevel_get)
 librc_hidden_proto(rc_runlevel_list)
diff --git a/src/librc/rc.h.in b/src/librc/rc.h.in
index 7c94c3eb..30fbfd0e 100644
--- a/src/librc/rc.h.in
+++ b/src/librc/rc.h.in
@@ -306,6 +306,11 @@ typedef void *RC_DEPTREE;
 * @return true if source is newer than target, otherwise false */ 
 bool rc_newer_than(const char *, const char *);
 
+/*! Check to see if source is newer than target.
+ * If target is a directory then we traverse it and it's children.
+* @return true if source is newer than target, otherwise false */ 
+bool rc_older_than(const char *, const char *);
+
 /*! Update the cached dependency tree if it's older than any init script,
  * its configuration file or an external configuration file the init script
  * has specified.
diff --git a/src/librc/rc.map b/src/librc/rc.map
index 8a803f3d..e1dd8437 100644
--- a/src/librc/rc.map
+++ b/src/librc/rc.map
@@ -13,6 +13,7 @@ global:
 	rc_environ_fd;
 	rc_find_pids;
 	rc_newer_than;
+	rc_older_than;
 	rc_runlevel_exists;
 	rc_runlevel_get;
 	rc_runlevel_list;
-- 
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