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// BZ #12724
static void do_prepare (void);
#define PREPARE(argc, argv) do_prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test()
#include "../test-skeleton.c"
static int fd;
static void
do_prepare (void)
{
fd = create_temp_file ("bug-fclose1.", NULL);
if (fd == -1)
{
printf ("cannot create temporary file: %m\n");
exit (1);
}
}
static int
do_test (void)
{
static const char pattern[] = "hello world";
/* Prepare a seekable file. */
if (write (fd, pattern, sizeof pattern) != sizeof pattern)
{
printf ("cannot write pattern: %m\n");
return 1;
}
if (lseek (fd, 1, SEEK_SET) != 1)
{
printf ("cannot seek after write: %m\n");
return 1;
}
/* Create an output stream visiting the file; when it is closed, all
other file descriptors visiting the file must see the new file
position. */
int fd2 = dup (fd);
if (fd2 < 0)
{
printf ("cannot duplicate descriptor for writing: %m\n");
return 1;
}
FILE *f = fdopen (fd2, "w");
if (f == NULL)
{
printf ("first fdopen failed: %m\n");
return 1;
}
if (fputc (pattern[1], f) != pattern[1])
{
printf ("fputc failed: %m\n");
return 1;
}
if (fclose (f) != 0)
{
printf ("first fclose failed: %m\n");
return 1;
}
errno = 0;
if (lseek (fd2, 0, SEEK_CUR) != -1)
{
printf ("lseek after fclose after write did not fail\n");
return 1;
}
if (errno != EBADF)
{
printf ("lseek after fclose after write did not fail with EBADF: %m\n");
return 1;
}
off_t o = lseek (fd, 0, SEEK_CUR);
if (o != 2)
{
printf ("\
lseek on original descriptor after first fclose returned %ld, expected 2\n",
(long int) o);
return 1;
}
/* Likewise for an input stream. */
fd2 = dup (fd);
if (fd2 < 0)
{
printf ("cannot duplicate descriptor for reading: %m\n");
return 1;
}
f = fdopen (fd2, "r");
if (f == NULL)
{
printf ("second fdopen failed: %m\n");
return 1;
}
char c = fgetc (f);
if (c != pattern[2])
{
printf ("getc returned %c, expected %c\n", c, pattern[2]);
return 1;
}
if (fclose (f) != 0)
{
printf ("second fclose failed: %m\n");
return 1;
}
errno = 0;
if (lseek (fd2, 0, SEEK_CUR) != -1)
{
printf ("lseek after fclose after read did not fail\n");
return 1;
}
if (errno != EBADF)
{
printf ("lseek after fclose after read did not fail with EBADF: %m\n");
return 1;
}
o = lseek (fd, 0, SEEK_CUR);
if (o != 3)
{
printf ("\
lseek on original descriptor after second fclose returned %ld, expected 3\n",
(long int) o);
return 1;
}
return 0;
}
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