1: #include <petscsys.h>
  2: #if defined(PETSC_HAVE_SYS_TIME_H)
  3:   #include <sys/time.h>
  4: #endif
  5: #include <time.h>
  6: #if defined(PETSC_NEEDS_GETTIMEOFDAY_PROTO)
  7: PETSC_EXTERN int gettimeofday(struct timeval *, struct timezone *);
  8: #endif

 10: /*@C
 11:   PetscGetDate - Gets the current date.

 13:   Not Collective

 15:   Input Parameter:
 16: . len - length of string to hold date

 18:   Output Parameter:
 19: . date - the date

 21:   Level: beginner

 23:   Note:
 24:   This function makes a system call and thus SHOULD NOT be called from an error handler.

 26:   Developer Notes:
 27:   This function is called once during `PetscInitialize()`.
 28:   It stashes the timestamp, and uses it when needed. This is so that
 29:   error handlers may report the date without generating possible
 30:   additional system errors during the call to get the date.

 32: .seealso: `PetscGetHostName()`
 33: @*/
 34: PetscErrorCode PetscGetDate(char date[], size_t len)
 35: {
 36:   char *str = NULL;
 37: #if defined(PETSC_HAVE_TIME)
 38:   time_t aclock;
 39: #else
 40:   struct timeval tp;
 41: #endif

 43:   PetscFunctionBegin;
 44: #if defined(PETSC_HAVE_TIME)
 45:   time(&aclock);
 46:   PetscCall(PetscStrncpy(date, asctime(localtime(&aclock)), len));
 47: #else
 48:   gettimeofday(&tp, (struct timezone *)0);
 49:   PetscCall(PetscStrncpy(date, asctime(localtime((time_t *)&tp.tv_sec)), len));
 50: #endif
 51:   /* now strip out the new-line chars at the end of the string */
 52:   PetscCall(PetscStrstr(date, "\n", &str));
 53:   if (str) str[0] = 0;
 54:   PetscFunctionReturn(PETSC_SUCCESS);
 55: }