glibc/libio/tst-eof.c

76 lines
1.2 KiB
C
Raw Normal View History

#include <fcntl.h>
#include <stdio.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>
int fd;
static void
do_prepare (void)
{
fd = create_temp_file ("tst-eof.", NULL);
if (fd == -1)
{
printf ("cannot create temporary file: %m\n");
exit (1);
}
}
static int
do_test (void)
{
char buf[40];
FILE *fp;
if (write (fd, "some string\n", 12) != 12)
{
printf ("cannot write temporary file: %m\n");
return 1;
}
if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
{
printf ("cannot reposition temporary file: %m\n");
return 1;
}
fp = fdopen (fd, "r");
if (fp == NULL)
{
printf ("cannot create stream: %m\n");
return 1;
}
if (feof (fp))
{
puts ("EOF set after fdopen");
return 1;
}
if (fread (buf, 1, 20, fp) != 12)
{
puts ("didn't read the correct number of bytes");
return 1;
}
if (! feof (fp))
{
puts ("EOF not set after fread");
return 1;
}
fclose (fp);
return 0;
}