login-utils/ch-common.c

   1 /*
   2  * chfn and chsh shared functions
   3  *
   4  * this program is free software.  you can redistribute it and
   5  * modify it under the terms of the gnu general public license.
   6  * there is no warranty.
   7  */
   8
   9 #include <ctype.h>
  10 #include <string.h>
  11
  12 #include "c.h"
  13 #include "nls.h"
  14
  15 #include "ch-common.h"
  16
  17 /*
  18  *  illegal_passwd_chars () -
  19  *      check whether a string contains illegal characters
  20  */
  21 int illegal_passwd_chars(const char *str)
  22 {
  23         const char illegal[] = ",:=\"\n";
  24         const size_t len = strlen(str);
  25         size_t i;
  26
  27         if (strpbrk(str, illegal))
  28                 return 1;
  29         for (i = 0; i < len; i++) {
  30                 if (iscntrl(str[i]))
  31                         return 1;
  32         }
  33         return 0;
  34 }