clang compiler warnings: Fix warning for -Wgnu-variable-sized-type-not-at-end

This patch fixes a warning caught by clang, wherein a variable sized struct is
not located at the end of a struct. While the code in question actually
expected this, this is a good warning to watch for. Hence, this patch refactors
the code in question to not have two variable length elements in the same
struct.

Review: https://reviewboard.asterisk.org/r/4530/

ASTERISK-24917
Reported by: dkdegroot
patches:
  rb4530.patch submitted by dkdegroot (License 6600)
........

Merged revisions 433717 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 433718 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@433719 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 7 insertions, 7 deletions

diff --git a/main/stdtime/localtime.c b/main/stdtime/localtime.c
index 969c59749..2cd5003d1 100644
--- a/main/stdtime/localtime.c
+++ b/main/stdtime/localtime.c
@@ -354,10 +354,9 @@ static int inotify_fd = -1;
 
 static void *inotify_daemon(void *data)
 {
-	struct {
-		struct inotify_event iev;
-		char name[FILENAME_MAX + 1];
-	} buf;
+	/* inotify_event is dynamically sized */
+	struct inotify_event *iev;
+	size_t real_sizeof_iev = sizeof(*iev) + FILENAME_MAX + 1;
 	ssize_t res;
 	struct state *cur;
 
@@ -372,14 +371,15 @@ static void *inotify_daemon(void *data)
 		inotify_thread = AST_PTHREADT_NULL;
 		return NULL;
 	}
+	iev = ast_alloca(real_sizeof_iev);
 
 	common_startup();
 
 	for (;/*ever*/;) {
 		/* This read should block, most of the time. */
-		if ((res = read(inotify_fd, &buf, sizeof(buf))) < sizeof(buf.iev) && res > 0) {
+		if ((res = read(inotify_fd, &iev, real_sizeof_iev)) < sizeof(*iev) && res > 0) {
 			/* This should never happen */
-			ast_log(LOG_ERROR, "Inotify read less than a full event (%zd < %zu)?!!\n", res, sizeof(buf.iev));
+			ast_log(LOG_ERROR, "Inotify read less than a full event (%zd < %zu)?!!\n", res, sizeof(*iev));
 			break;
 		} else if (res < 0) {
 			if (errno == EINTR || errno == EAGAIN) {
@@ -395,7 +395,7 @@ static void *inotify_daemon(void *data)
 		}
 		AST_LIST_LOCK(&zonelist);
 		AST_LIST_TRAVERSE_SAFE_BEGIN(&zonelist, cur, list) {
-			if (cur->wd[0] == buf.iev.wd || cur->wd[1] == buf.iev.wd) {
+			if (cur->wd[0] == iev->wd || cur->wd[1] == iev->wd) {
 				AST_LIST_REMOVE_CURRENT(list);
 				sstate_free(cur);
 				break;