From: Boram Park <boram1288.park@samsung.com>
Date: Wed, 21 Feb 2018 07:09:04 +0000 (+0900)
Subject: log: restore stdout when set NULL.
X-Git-Tag: submit/tizen/20180227.014049~51
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d7cab3249db011494da88586a9488de357194b15;p=platform%2Fcore%2Fuifw%2Flibtdm.git

log: restore stdout when set NULL.


Change-Id: I25934b33f8468e55fdd063068f868fafab81f948
---

diff --git a/common/tdm_log.c b/common/tdm_log.c
index 3ddcda12..1befbfb8 100644
--- a/common/tdm_log.c
+++ b/common/tdm_log.c
@@ -69,6 +69,8 @@ static pthread_mutex_t log_lock;
 
 unsigned int tdm_log_debug_level = TDM_LOG_LEVEL_INFO;
 
+static int stdout_fd = -1;
+
 EXTERN void
 tdm_log_enable_color(unsigned int enable)
 {
@@ -105,26 +107,40 @@ tdm_log_set_assert_level(int level)
 EXTERN void
 tdm_log_set_path(const char *path)
 {
-	char fd_name[TDM_PATH_LEN];
-	int  log_fd = -1;
-	FILE *log_fl;
+	if (!path) {
+		if (stdout_fd != -1) {
+			fflush(stdout);
+			close(STDOUT_FILENO);
+			dup2(stdout_fd, STDOUT_FILENO);
+			close(stdout_fd);
+			stdout_fd = -1;
+		}
+	} else {
+		char fd_name[TDM_PATH_LEN];
+		int  log_fd = -1;
+		FILE *log_fl;
 
-	snprintf(fd_name, TDM_PATH_LEN, "%s", path);
+		snprintf(fd_name, TDM_PATH_LEN, "%s", path);
 
-	log_fl = fopen(fd_name, "a");
-	if (!log_fl) {
-		TDM_ERR("failed: open file(%s)\n", fd_name);
-		return;
-	}
+		log_fl = fopen(fd_name, "a");
+		if (!log_fl) {
+			TDM_ERR("failed: open file(%s)\n", fd_name);
+			return;
+		}
 
-	fflush(stdout);
-	close(STDOUT_FILENO);
+		if (stdout_fd == -1) {
+			fflush(stdout);
+			stdout_fd = dup(STDOUT_FILENO);
+			TDM_RETURN_IF_FAIL(stdout_fd != -1);
+		}
 
-	setvbuf(log_fl, NULL, _IOLBF, 512);
-	log_fd = fileno(log_fl);
+		setvbuf(log_fl, NULL, _IOLBF, 512);
+		log_fd = fileno(log_fl);
 
-	dup2(log_fd, STDOUT_FILENO);
-	fclose(log_fl);
+		close(STDOUT_FILENO);
+		dup2(log_fd, STDOUT_FILENO);
+		fclose(log_fl);
+	}
 }
 
 EXTERN void