src/regression/fgets-eof.c

   1 // fgets must not modify the buffer on eof
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include "test.h"
   6
   7 #define ASSERT(c) do { if (!(c)) t_error("%s failed\n", #c); } while(0)
   8
   9 int main(void)
  10 {
  11         char buf[] = "test";
  12         char s[10];
  13         FILE *f;
  14
  15         ASSERT((f = fmemopen(buf, sizeof buf, "r")) != 0);
  16         ASSERT(fgets(s, sizeof s, f) == s);
  17         ASSERT(strcmp(s, buf) == 0);
  18         ASSERT(fgets(s, sizeof s, f) == 0);
  19         if (s[0] != 't')
  20                 t_error("fgets modified the buffer after eof\n");
  21         return t_status;
  22 }