cae6ebb2c9
2005-09-27 Ulrich Drepper <drepper@redhat.com> [BZ #1078] * libio/fileops.c (_IO_new_file_xsputn): Determine amount of available space in non-line-buffered buffer correctly. * libio/oldfileops.c (_IO_old_file_xsputn): Likewise. * stdio-common/Makefile (tests): Add tst-fwrite. * stdio-common/tst-fwrite.c: New file.
71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
/* Derived from the test case in
|
|
http://sourceware.org/bugzilla/show_bug.cgi?id=1078. */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#define OUT_SIZE 10000
|
|
|
|
|
|
static int fd;
|
|
|
|
static void prepare (void);
|
|
#define PREPARE(argc, argv) prepare ()
|
|
|
|
static int do_test (void);
|
|
#define TEST_FUNCTION do_test ()
|
|
|
|
#include "../test-skeleton.c"
|
|
|
|
|
|
static void
|
|
prepare (void)
|
|
{
|
|
fd = create_temp_file ("tst-fwrite.", NULL);
|
|
if (fd == -1)
|
|
{
|
|
puts ("cannot create temporary file");
|
|
exit (1);
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
FILE* f = fdopen (fd, "w+");
|
|
if (f == NULL) {
|
|
puts ("cannot create stream");
|
|
return 1;
|
|
}
|
|
puts ("Opened temp file");
|
|
|
|
if (fwrite ("a", 1, 1, f) != 1)
|
|
{
|
|
puts ("1st fwrite failed");
|
|
return 1;
|
|
}
|
|
puts ("Wrote a byte");
|
|
fflush (f);
|
|
|
|
char buffer[10000];
|
|
size_t i = fread (buffer, 1, sizeof (buffer), f);
|
|
printf ("Read %zu bytes\n", i);
|
|
|
|
for (i = 0; i < OUT_SIZE; i++)
|
|
{
|
|
if (fwrite ("n", 1, 1, f) != 1)
|
|
{
|
|
printf ("fwrite in loop round %zu failed\n", i);
|
|
return 1;
|
|
}
|
|
|
|
if ((i + 1) % 1000 == 0)
|
|
printf ("wrote %zu bytes ...\n", i + 1);
|
|
}
|
|
|
|
printf ("Wrote %i bytes [done]\n", OUT_SIZE);
|
|
|
|
return 0;
|
|
}
|