1: #include <stdio.h>
    2: #include <sys/types.h>
    3: 
    4: 
    5: static int
    6: check (FILE *fp, off_t o)
    7: {
    8:   int result = 0;
    9:   if (feof (fp))
   10:     {
   11:       puts ("feof !");
   12:       result = 1;
   13:     }
   14:   if (ferror (fp))
   15:     {
   16:       puts ("ferror !");
   17:       result = 1;
   18:     }
   19:   if (ftello (fp) != o)
   20:     {
   21:       printf ("position = %lu, not %lu\n", (unsigned long int) ftello (fp),
   22:               (unsigned long int) o);
   23:       result = 1;
   24:     }
   25:   return result;
   26: }
   27: 
   28: 
   29: static int
   30: do_test (void)
   31: {
   32:   FILE *fp = tmpfile ();
   33:   if (fp == NULL)
   34:     {
   35:       puts ("tmpfile failed");
   36:       return 1;
   37:     }
   38:   if (check (fp, 0) != 0)
   39:     return 1;
   40: 
   41:   puts ("going to write");
   42:   if (fputs ("hello", fp) == EOF)
   43:     {
   44:       puts ("fputs failed");
   45:       return 1;
   46:     }
   47:   if (check (fp, 5) != 0)
   48:     return 1;
   49: 
   50:   puts ("going to rewind");
   51:   rewind (fp);
   52:   if (check (fp, 0) != 0)
   53:     return 1;
   54: 
   55:   puts ("going to read char");
   56:   int c = fgetc (fp);
   57:   if (c != 'h')
   58:     {
   59:       printf ("read %c, not %c\n", c, 'h');
   60:       return 1;
   61:     }
   62:   if (check (fp, 1) != 0)
   63:     return 1;
   64: 
   65:   puts ("going to put back");
   66:   if (ungetc (' ', fp) == EOF)
   67:     {
   68:       puts ("ungetc failed");
   69:       return 1;
   70:     }
   71:   if (check (fp, 0) != 0)
   72:     return 1;
   73: 
   74:   puts ("going to write again");
   75:   if (fputs ("world", fp) == EOF)
   76:     {
   77:       puts ("2nd fputs failed");
   78:       return 1;
   79:     }
   80:   if (check (fp, 5) != 0)
   81:     return 1;
   82: 
   83:   puts ("going to rewind again");
   84:   rewind (fp);
   85:   if (check (fp, 0) != 0)
   86:     return 1;
   87: 
   88:   if (fclose (fp) != 0)
   89:     {
   90:       puts ("fclose failed");
   91:       return 1;
   92:     }
   93: 
   94:   return 0;
   95: }
   96: 
   97: #define TEST_FUNCTION do_test ()
   98: #include "../test-skeleton.c"