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#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static int fd;
static char *fname;
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
#define TEST_FUNCTION do_test ()
static int do_test (void);
#include "../test-skeleton.c"
static void
prepare (void)
{
fd = create_temp_file ("wrewind.", &fname);
if (fd == -1)
exit (3);
}
static int
do_test (void)
{
char buf[100];
FILE *fp;
int result = 0;
fp = fdopen (fd, "w");
if (fp == NULL)
{
puts ("cannot create file");
exit (1);
}
if (fputs ("one\n", fp) == EOF || fputs ("two\n", fp) == EOF)
{
puts ("cannot create filec content");
exit (1);
}
fclose (fp);
fp = fopen (fname, "a+");
if (fp == NULL)
{
puts ("cannot fopen a+");
exit (1);
}
if (fgets (buf, sizeof (buf), fp) == NULL)
{
puts ("cannot read after fopen a+");
exit (1);
}
if (strcmp (buf, "one\n") != 0)
{
puts ("read after fopen a+ produced wrong result");
result = 1;
}
fclose (fp);
fd = open (fname, O_RDWR);
if (fd == -1)
{
puts ("open failed");
exit (1);
}
fp = fdopen (fd, "a+");
if (fp == NULL)
{
puts ("fopen after open failed");
exit (1);
}
if (fgets (buf, sizeof (buf), fp) == NULL)
{
puts ("cannot read after fdopen a+");
exit (1);
}
if (strcmp (buf, "one\n") != 0)
{
puts ("read after fdopen a+ produced wrong result");
result = 1;
}
fclose (fp);
return result;
}
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