src/regression/ftello-unflushed-append.c

   1 // commit 3af2edee150484940916eba1984f78c3b965dd05 2014-02-07
   2 // fix ftello result for append streams with unflushed output
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include "test.h"
  10
  11 #define ASSERT(c) do { \
  12         errno = 0; \
  13         if (!(c)) \
  14                 t_error("%s failed (errno: %s)\n", #c, strerror(errno)); \
  15 } while(0)
  16
  17 int main(void)
  18 {
  19         char tmp[] = "/tmp/testsuite-XXXXXX";
  20         int fd;
  21         FILE *f;
  22         off_t off;
  23
  24         ASSERT((fd = mkstemp(tmp)) > 2);
  25         ASSERT(write(fd, "abcd", 4) == 4);
  26         ASSERT(close(fd) == 0);
  27
  28         ASSERT((fd = open(tmp, O_WRONLY)) > 2);
  29         ASSERT(f = fdopen(fd, "a"));
  30         if (f) {
  31                 ASSERT(fwrite("efg", 1, 3, f) == 3);
  32                 ASSERT((off = ftello(f)) != -1);
  33                 if (off != 7)
  34                         t_error("ftello is broken before flush: got %lld, want 7\n", (long long)off);
  35                 ASSERT(fflush(f) == 0);
  36                 ASSERT((off = ftello(f)) != -1);
  37                 if (off != 7)
  38                         t_error("ftello is broken after flush: got %lld, want 7\n", (long long)off);
  39                 ASSERT(fclose(f) == 0);
  40         }
  41         if (fd > 2)
  42                 ASSERT(unlink(tmp) == 0);
  43         return t_status;
  44 }