unbound/compat/ctime_r.c

   1 /* taken from ldns 1.6.1 */
   2 #include "config.h"
   3 #ifdef HAVE_TIME_H
   4 #include <time.h>
   5 #endif
   6 #include "util/locks.h"
   7
   8 /** the lock for ctime buffer */
   9 static lock_basic_t ctime_lock;
  10 /** has it been inited */
  11 static int ctime_r_init = 0;
  12
  13 /** cleanup ctime_r on exit */
  14 static void
  15 ctime_r_cleanup(void)
  16 {
  17         if(ctime_r_init) {
  18                 ctime_r_init = 0;
  19                 lock_basic_destroy(&ctime_lock);
  20         }
  21 }
  22
  23 char *ctime_r(const time_t *timep, char *buf)
  24 {
  25         char* result;
  26         if(!ctime_r_init) {
  27                 /* still small race where this init can be done twice,
  28                  * which is mostly harmless */
  29                 ctime_r_init = 1;
  30                 lock_basic_init(&ctime_lock);
  31                 atexit(&ctime_r_cleanup);
  32         }
  33         lock_basic_lock(&ctime_lock);
  34         result = ctime(timep);
  35         if(buf && result) {
  36                 if(strlen(result) > 10 && result[7]==' ' && result[8]=='0')
  37                         result[8]=' '; /* fix error in windows ctime */
  38                 strcpy(buf, result);
  39         }
  40         lock_basic_unlock(&ctime_lock);
  41         return result;
  42 }