string/bug-strncat1.c

   1 #undef __USE_STRING_INLINES
   2 #define __USE_STRING_INLINES
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <libc-diag.h>
   7
   8 char d[3] = "\0\1\2";
   9
  10 int
  11 main (void)
  12 {
  13   DIAG_PUSH_NEEDS_COMMENT;
  14 #if __GNUC_PREREQ (8, 0)
  15   /* GCC 8 warns about strncat truncating output; this is deliberately
  16      tested here.  */
  17   DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
  18 #endif
  19   strncat (d, "\5\6", 1);
  20   DIAG_POP_NEEDS_COMMENT;
  21   if (d[0] != '\5')
  22     {
  23       puts ("d[0] != '\\5'");
  24       exit (1);
  25     }
  26   if (d[1] != '\0')
  27     {
  28       puts ("d[1] != '\\0'");
  29       exit (1);
  30     }
  31   if (d[2] != '\2')
  32     {
  33       puts ("d[2] != '\\2'");
  34       exit (1);
  35     }
  36
  37   return 0;
  38 }