call getFileContentEx with offset constant

src/fast_buffer.c

@@ -180,6 +180,7 @@ int fast_buffer_append_binary(FastBuffer *buffer,
 
 int fast_buffer_append_file(FastBuffer *buffer, const char *filename)
 {
+    const int64_t offset = 0;
     struct stat st;
     int result;
     int64_t file_size;
@@ -213,7 +214,7 @@ int fast_buffer_append_file(FastBuffer *buffer, const char *filename)
     }
 
     if ((result=getFileContentEx(filename, buffer->data + buffer->length,
-                    0, &file_size)) != 0)
+                    offset, &file_size)) != 0)
     {
         return result;
     }

src/process_ctrl.c

@@ -24,6 +24,7 @@
 
 int get_pid_from_file(const char *pidFilename, pid_t *pid)
 {
+  const int64_t offset = 0;
   char buff[32];
   int64_t file_size;
   int result;
@@ -33,7 +34,7 @@ int get_pid_from_file(const char *pidFilename, pid_t *pid)
   }
 
   file_size = sizeof(buff);
-  if ((result=getFileContentEx(pidFilename, buff, 0, &file_size)) != 0) {
+  if ((result=getFileContentEx(pidFilename, buff, offset, &file_size)) != 0) {
     return result;
   }
 
@@ -183,12 +184,13 @@ static const char *process_get_exename(const char* program)
 static const char *get_exename_by_pid(const pid_t pid, char *buff,
         const int buff_size, int *result)
 {
+    const int64_t offset = 0;
     char cmdfile[MAX_PATH_SIZE];
     int64_t cmdsz;
 
     cmdsz = buff_size;
     sprintf(cmdfile, "/proc/%d/cmdline", pid);
-    if ((*result=getFileContentEx(cmdfile, buff, 0, &cmdsz)) != 0) {
+    if ((*result=getFileContentEx(cmdfile, buff, offset, &cmdsz)) != 0) {
         fprintf(stderr, "read file %s fail, errno: %d, error info: %s\n",
                 cmdfile, *result, strerror(*result));
         return NULL;

src/shared_func.c

@@ -4090,12 +4090,13 @@ int fc_check_rename_ex(const char *oldpath, const char *newpath,
 int fc_get_first_line(const char *filename, char *buff,
         const int buff_size, string_t *line)
 {
+    const int64_t offset = 0;
     int result;
     int64_t read_bytes;
     char *line_end;
 
     read_bytes = buff_size - 1;
-    if ((result=getFileContentEx(filename, buff, 0, &read_bytes)) != 0) {
+    if ((result=getFileContentEx(filename, buff, offset, &read_bytes)) != 0) {
         FC_SET_STRING_EMPTY(*line, buff);
         return result;
     }
@@ -4121,6 +4122,7 @@ int fc_get_first_line(const char *filename, char *buff,
 int fc_get_first_lines(const char *filename, char *buff,
         const int buff_size, string_t *lines, int *count)
 {
+    const int64_t offset = 0;
     int result;
     int target_count;
     int64_t read_bytes;
@@ -4134,7 +4136,7 @@ int fc_get_first_lines(const char *filename, char *buff,
     }
 
     read_bytes = buff_size - 1;
-    if ((result=getFileContentEx(filename, buff, 0, &read_bytes)) != 0) {
+    if ((result=getFileContentEx(filename, buff, offset, &read_bytes)) != 0) {
         *count = 0;
         FC_SET_STRING_EMPTY(*lines, buff);
         return result;

src/shared_func.h

@@ -878,7 +878,7 @@ int getFileContentEx1(int fd, const char *filename, char *buff,
  *  	size: specify the size to fetch and return the fetched size
  *  return: error no , 0 success, != 0 fail
 */
-int getFileContentEx(const char *filename, char *buff, \
+int getFileContentEx(const char *filename, char *buff,
 		int64_t offset, int64_t *size);
 
 /** get file size

src/system_info.c

@@ -118,12 +118,13 @@ int get_sys_cpu_count()
 int get_boot_time(struct timeval *boot_time)
 {
 #ifdef OS_LINUX
+    const int64_t offset = 0;
     char buff[256];
     int64_t bytes;
     struct sysinfo si;
 
     bytes = sizeof(buff);
-    if (getFileContentEx("/proc/uptime", buff, 0, &bytes) == 0)
+    if (getFileContentEx("/proc/uptime", buff, offset, &bytes) == 0)
     {
         double uptime;
         double btime;
@@ -621,6 +622,7 @@ static void parse_proc_stat(char *buff, const int len,
 
 int get_processes(struct fast_process_info **processes, int *count)
 {
+    const int64_t offset = 0;
     const char *dirname = "/proc";
     char filename[128];
     char buff[4096];
@@ -679,7 +681,7 @@ int get_processes(struct fast_process_info **processes, int *count)
 
         sprintf(filename, "%s/%s/stat", dirname, ent->d_name);
         bytes = sizeof(buff);
-        if (getFileContentEx(filename, buff, 0, &bytes) != 0)
+        if (getFileContentEx(filename, buff, offset, &bytes) != 0)
         {
             continue;
         }