lib/str.c

   1 /*
   2  * zebra string function
   3  *
   4  * these functions are just very basic wrappers around exiting ones and
   5  * do not offer the protection that might be expected against buffer
   6  * overruns etc
   7  */
   8
   9 #include <zebra.h>
  10
  11 #include "str.h"
  12
  13 #ifndef HAVE_SNPRINTF
  14 /*
  15  * snprint() is a real basic wrapper around the standard sprintf()
  16  * without any bounds checking
  17  */
  18 int
  19 snprintf(char *str, size_t size, const char *format, ...)
  20 {
  21   va_list args;
  22
  23   va_start (args, format);
  24
  25   return vsprintf (str, format, args);
  26 }
  27 #endif
  28
  29 #ifndef HAVE_STRLCPY
  30 /*
  31  * strlcpy is a safer version of strncpy(), checking the total
  32  * size of the buffer
  33  */
  34 size_t
  35 strlcpy(char *dst, const char *src, size_t size)
  36 {
  37   strncpy(dst, src, size);
  38
  39   return (strlen(dst));
  40 }
  41 #endif
  42
  43 #ifndef HAVE_STRLCAT
  44 /*
  45  * strlcat is a safer version of strncat(), checking the total
  46  * size of the buffer
  47  */
  48 size_t
  49 strlcat(char *dst, const char *src, size_t size)
  50 {
  51   /* strncpy(dst, src, size - strlen(dst)); */
  52
  53   /* I've just added below code only for workable under Linux.  So
  54      need rewrite -- Kunihiro. */
  55   if (strlen (dst) + strlen (src) >= size)
  56     return -1;
  57
  58   strcat (dst, src);
  59
  60   return (strlen(dst));
  61 }
  62 #endif