Add api for widget file log

Change-Id: Icd22a34bb266598ed3eb74bde752db739ae6732f
Signed-off-by: hyunho <hhstark.kang@samsung.com>

2 files changed, 97 insertions, 0 deletions

diff --git a/include/aul_widget.h b/include/aul_widget.h
index ec45fa15..2b0dd0da 100755
--- a/include/aul_widget.h
+++ b/include/aul_widget.h
@@ -138,6 +138,16 @@ int aul_widget_info_get_app_path(aul_widget_info_h info, char **app_path);
  */
 int aul_widget_instance_change_status(const char *widget_id, const char *status);
 
+/**
+ * @par Description:
+ *      Writes file log.
+ * @param[in]   tag		The log tag
+ * @param[in]   format		The log foramt
+ * @return      @c 0 on success,
+ *              otherwise a negative error value
+ */
+int aul_widget_write_log(const char *tag, const char *format, ...);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/widget.c b/src/widget.c
index 857c032f..4ee8b539 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -17,8 +17,12 @@
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 #include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <glib.h>
 #include <bundle.h>
 #include <bundle_internal.h>
@@ -46,6 +50,89 @@ struct widget_cb_info {
 	void *user_data;
 };
 
+#define WIDGET_LOG_BUFFER_SIZE 10000
+#define WIDGET_LOG_BUFFER_STRING_SIZE 128
+
+static int __log_index;
+static int __log_fd;
+static bool __log_init = false;
+
+static int __init_log(void)
+{
+	int offset;
+	char buffer[256] = {0, };
+	char caller[255] = {0, };
+
+	aul_app_get_appid_bypid(getpid(), caller, sizeof(caller));
+	snprintf(buffer, sizeof(buffer),
+			"/run/aul/log/widget/%d/widget_%s.log", getuid(), caller);
+	__log_fd = open(buffer, O_CREAT | O_WRONLY, 0644);
+	if (__log_fd < 0) {
+		_E("Failed to open %s - %d", buffer, errno);
+		return -1;
+	}
+
+	offset = lseek(__log_fd, 0, SEEK_END);
+	if (offset != 0) {
+		__log_index = (int)(offset / WIDGET_LOG_BUFFER_STRING_SIZE);
+		if (__log_index >= WIDGET_LOG_BUFFER_SIZE) {
+			__log_index = 0;
+			lseek(__log_fd, 0, SEEK_SET);
+		}
+	}
+	__log_init = true;
+
+	return 0;
+}
+
+API int aul_widget_write_log(const char *tag, const char *format, ...)
+{
+	int ret;
+	int offset;
+	time_t now;
+	char time_buf[32] = {0,};
+	char format_buffer[WIDGET_LOG_BUFFER_STRING_SIZE];
+	char buffer[WIDGET_LOG_BUFFER_STRING_SIZE];
+	va_list ap;
+
+	if (!__log_init)
+		__init_log();
+
+	if (__log_fd < 0) {
+		_E("Invalid file descriptor");
+		return -1;
+	}
+
+	time(&now);
+	ctime_r(&now, time_buf);
+	if (__log_index != 0)
+		offset = lseek(__log_fd, 0, SEEK_CUR);
+	else
+		offset = lseek(__log_fd, 0, SEEK_SET);
+
+	if (offset == -1)
+		_E("error in lseek: %d", errno);
+
+
+	va_start(ap, format);
+	vsnprintf(format_buffer, sizeof(format_buffer), format, ap);
+	va_end(ap);
+
+	snprintf(buffer, sizeof(buffer), "[%-6d][%-5d] %-15s %-50s %s",
+			getpid(), __log_index, tag, format_buffer, time_buf);
+
+	ret = write(__log_fd, buffer, strlen(buffer));
+	if (ret < 0) {
+		_E("Cannot write the amd log: %d", ret);
+		return -1;
+	}
+
+	if (++__log_index >= WIDGET_LOG_BUFFER_SIZE)
+		__log_index = 0;
+
+	return 0;
+}
+
 static const char *__to_appid(const char *widget_id)
 {
 	const char *appid;