glibc/libio/tst-eof.c

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#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include <test-skeleton.c>
static int
do_test (void)
{
char *buf;
int fd;
FILE *fp;
buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-eof.XXXXXX");
if (buf == NULL)
{
printf ("cannot allocate memory: %m\n");
return 1;
}
stpcpy (stpcpy (buf, test_dir), "/tst-eof.XXXXXX");
fd = mkstemp (buf);
if (fd == -1)
{
printf ("cannot open temporary file: %m\n");
return 1;
}
/* Make sure it gets removed. */
add_temp_file (buf);
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;
}