Mod aaa-12 modify finding serial method

RCA：
SOL：
修改人：zhangtao
检视人：

Platform/user/ulog/log-sched/log_console.c

@@ -1,4 +1,5 @@
 #include <errno.h>
+#include <unistd.h>
 #include <dirent.h>
 #include <sys/types.h>
 
@@ -9,46 +10,60 @@
 #include "sev_sched.h"
 
 #define LOG_CONF_COSOLE_FILE_NAME      "log-console.conf"
-
 #define LOG_REDIRECT_CONSOLE           "/dev/console"
+#define PROC_SERIAL_INFO_PATH          "/proc/tty/driver/serial"
+
+#define SERIAL_DRIVER_PREFIX            "uart"
+#define SERIAL_NO_DRIVER_KEY            SERIAL_DRIVER_PREFIX":unknown"
+#define SERIAL_PREFIX                   "ttyS"
 
 static int write_console_content(FILE *fp, const u8 level, const char *filter_mod, void *arg)
 {
-    DIR *dir;
-    
-    if ((dir = opendir(LOG_DEV_DIR)) == NULL) {
-        ULOG_ERR(g_log, "Open dir:[%s] is failure:%d", LOG_DEV_DIR, strerror(errno));
-        return -1;
+    int ret = -1;
+    FILE *driver_fp = NULL;
+	driver_fp = fopen(PROC_SERIAL_INFO_PATH, "r");
+    if (driver_fp == NULL) {
+        ULOG_ERR(g_log, "Opening file:%s is failure:%s", PROC_SERIAL_INFO_PATH, strerror(errno));
+        return ret;
     }
 
-    struct dirent *ptr;
+    char *line = NULL;
+    size_t n;
+    int num;
     char path[MAX_PATH_SZ];
-    while ((ptr = readdir(dir)) != NULL) {
-        if ((strcmp(ptr->d_name, ".") == 0) 
-            || (strcmp(ptr->d_name, "..") == 0)
-            || (ptr->d_type == DT_DIR)) {   ///current dir OR parrent dir
-            ULOG_DEBUG(g_log,"The file:[%s] or directory jump over", ptr->d_name);
+    while ((n = getline(&line, &n, driver_fp)) != -1) {
+        ULOG_DEBUG(g_log, "Serial line:%s", line); 
+        if (strstr(line, SERIAL_DRIVER_PREFIX) == NULL) {
+            ULOG_DEBUG(g_log, "%s isn't driver line", line);
             continue;
         }
     
-        if ((strstr(ptr->d_name, "ttyS") == NULL)) {
-            ULOG_DEBUG(g_log,"The file:[%s] isn't redirected", ptr->d_name);
+        num = atoi(line);
+        if (strstr(line, SERIAL_NO_DRIVER_KEY) != NULL) {
+            ULOG_DEBUG(g_log, "%s%d don't have serial", SERIAL_PREFIX, num);
             continue;
         }      
 
-        ULOG_DEBUG(g_log, "ttyS name:%s", ptr->d_name);
-        if (snprintf(path, sizeof(path), "%s%s", LOG_DEV_DIR, ptr->d_name) < 0) {
-            ULOG_ERR(g_log, "Setting %s of log console is failure", ptr->d_name);
-            return -1;
+              
+        if (snprintf(path, sizeof(path), "%s%s%d", LOG_DEV_DIR, SERIAL_PREFIX, num) < 0) {
+            ULOG_ERR(g_log, "Setting %s%d of log console is failure", SERIAL_PREFIX, num);
+            goto END;
         }
+        ULOG_DEBUG(g_log, "ttyS name:%s", path); 
         if (write_conf_content_authorizing(fp, level, filter_mod, path) != 0) {
             ULOG_ERR(g_log, "Writing tty[module:%s] of log is failure", filter_mod);
-            return -1;
+            goto END;
         }
-        
     }
     
-    return 0;
+    ret = 0;
+END:
+    if (line != NULL) {
+        free(line);
+    }
+
+    fclose(driver_fp);
+    return ret;
 }