src/regression/setvbuf-unget.c

   1 // commit: 9cad27a3dc1a4eb349b6591e4dc8cc89dce32277
   2 // ungetc after setvbuf should not clobber memory below buffer
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include "test.h"
   6
   7 int main(void)
   8 {
   9         char buf[1024] = "hello world";
  10         setvbuf(stdin, buf+12, _IOFBF, sizeof buf - 12);
  11         while (ungetc('x', stdin)!=EOF);
  12         if (strcmp(buf, "hello world"))
  13                 t_error("ungetc clobbered outside buffer: [%.12s]\n", buf);
  14         return t_status;
  15 }