2002-08-02 03:29:37 +02:00
|
|
|
/* Test program for synchronization of stdio state with file after EOF. */
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <error.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
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 char *temp_file;
|
|
|
|
static int temp_fd;
|
|
|
|
|
|
|
|
static char *pages;
|
|
|
|
|
|
|
|
static void
|
|
|
|
do_prepare (void)
|
|
|
|
{
|
2016-06-11 23:50:16 +02:00
|
|
|
pages = xmalloc (getpagesize () * 2);
|
2002-08-02 03:29:37 +02:00
|
|
|
memset (pages, 'a', getpagesize ());
|
|
|
|
memset (pages + getpagesize (), 'b', getpagesize ());
|
|
|
|
|
|
|
|
temp_fd = create_temp_file ("tst-mmap2-eofsync.", &temp_file);
|
|
|
|
if (temp_fd == -1)
|
|
|
|
error (1, errno, "cannot create temporary file");
|
|
|
|
else
|
|
|
|
{
|
|
|
|
ssize_t cc = write (temp_fd, pages, getpagesize ());
|
|
|
|
if (cc != getpagesize ())
|
|
|
|
error (1, errno, "cannot write to temporary file");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
do_test (void)
|
|
|
|
{
|
|
|
|
const size_t pagesize = getpagesize ();
|
|
|
|
FILE *f;
|
|
|
|
char buf[pagesize];
|
|
|
|
int result = 0;
|
|
|
|
int c;
|
|
|
|
|
2002-08-30 12:36:44 +02:00
|
|
|
f = fopen (temp_file, "rm");
|
2002-08-02 03:29:37 +02:00
|
|
|
if (f == NULL)
|
|
|
|
{
|
|
|
|
perror (temp_file);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fread (buf, pagesize, 1, f) != 1)
|
|
|
|
{
|
|
|
|
perror ("fread");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (memcmp (buf, pages, pagesize))
|
|
|
|
{
|
|
|
|
puts ("data mismatch in page 1");
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
printf ("feof = %d, ferror = %d immediately after fread\n",
|
|
|
|
feof (f), ferror (f));
|
|
|
|
|
|
|
|
c = fgetc (f);
|
|
|
|
if (c == EOF)
|
|
|
|
printf ("fgetc -> EOF (feof = %d, ferror = %d)\n",
|
|
|
|
feof (f), ferror (f));
|
|
|
|
else
|
|
|
|
{
|
|
|
|
printf ("fgetc returned %o (feof = %d, ferror = %d)\n",
|
|
|
|
c, feof (f), ferror (f));
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
c = write (temp_fd, pages + pagesize, pagesize);
|
2002-09-24 06:24:25 +02:00
|
|
|
if (c == (ssize_t) pagesize)
|
2002-08-02 03:29:37 +02:00
|
|
|
printf ("wrote more to file\n");
|
|
|
|
else
|
|
|
|
{
|
2002-08-25 10:44:43 +02:00
|
|
|
printf ("wrote %d != %zd (%m)\n", c, pagesize);
|
2002-08-02 03:29:37 +02:00
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fread (buf, pagesize, 1, f) != 1)
|
|
|
|
{
|
|
|
|
printf ("second fread fails: feof = %d, ferror = %d (%m)\n",
|
|
|
|
feof (f), ferror (f));
|
|
|
|
clearerr (f);
|
|
|
|
if (fread (buf, pagesize, 1, f) != 1)
|
|
|
|
{
|
|
|
|
printf ("retry fread fails: feof = %d, ferror = %d (%m)\n",
|
|
|
|
feof (f), ferror (f));
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (result == 0 && memcmp (buf, pages + pagesize, pagesize))
|
|
|
|
{
|
|
|
|
puts ("data mismatch in page 2");
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
fseek (f, pagesize - 1, SEEK_SET);
|
|
|
|
c = fgetc (f);
|
|
|
|
if (c != 'a')
|
|
|
|
{
|
|
|
|
printf ("fgetc at end of page 1 read '%c' (%m)\n", c);
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ftruncate (temp_fd, pagesize) < 0)
|
|
|
|
{
|
|
|
|
printf ("ftruncate failed: %m\n");
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
fflush (f);
|
|
|
|
|
|
|
|
c = fgetc (f);
|
|
|
|
if (c == EOF)
|
|
|
|
printf ("after truncate fgetc -> EOF (feof = %d, ferror = %d)\n",
|
|
|
|
feof (f), ferror (f));
|
|
|
|
else
|
|
|
|
{
|
|
|
|
printf ("after truncate fgetc returned '%c' (feof = %d, ferror = %d)\n",
|
|
|
|
c, feof (f), ferror (f));
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
fclose (f);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|