Thread: Segmentation fault when initializing struct field by field

Hi All

consider the following initialization of a struct:

Code:

#include <stddef.h>
#include <stdlib.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>

struct CONFIG
 {
    int  *nos ;
    char *data_dir ;
    int *ratio ;
    regex_t *regex_int ;
    regex_t *regex_float ;
 } *_myconfig ;

int main(void) {
  _myconfig = (struct CONFIG*)malloc(sizeof(_myconfig)) ;
  _myconfig->regex_int = calloc(1, sizeof(regex_t)) ;
  _myconfig->regex_float = calloc(1, sizeof(regex_t)) ;
  regcomp( _myconfig->regex_int, "[[:digit:]]+$", REG_EXTENDED | REG_NOSUB ) ;
  regcomp( _myconfig->regex_float, "^[[:digit:]]+\\.[[:digit:]]+$", REG_EXTENDED | REG_NOSUB ) ;

  printf("so far so good?") ;
  return 0;
}

If you run this code you'll get an Segmentation fault. However when I change the order of fields in the struct like

Code:

struct CONFIG
 {
    int  *nos ;
    char *data_dir ;
    regex_t *regex_int ;
    regex_t *regex_float ;
    int *ratio ;
 } *_myconfig ;

Any suggestions whats happening here ?

cheers
LuCa

thats it, thanks!!!!