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#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static int dir_fd;
static void
prepare (void)
{
size_t test_dir_len = strlen (test_dir);
static const char dir_name[] = "/tst-openat.XXXXXX";
size_t dirbuflen = test_dir_len + sizeof (dir_name);
char *dirbuf = malloc (dirbuflen);
if (dirbuf == NULL)
{
puts ("out of memory");
exit (1);
}
snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
if (mkdtemp (dirbuf) == NULL)
{
puts ("cannot create temporary directory");
exit (1);
}
add_temp_file (dirbuf);
dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
if (dir_fd == -1)
{
puts ("cannot open directory");
exit (1);
}
}
static int
do_test (void)
{
/* fdopendir takes over the descriptor, make a copy. */
int dupfd = dup (dir_fd);
if (dupfd == -1)
{
puts ("dup failed");
return 1;
}
if (lseek (dupfd, 0, SEEK_SET) != 0)
{
puts ("1st lseek failed");
return 1;
}
/* The directory should be empty safe the . and .. files. */
DIR *dir = fdopendir (dupfd);
if (dir == NULL)
{
puts ("fdopendir failed");
return 1;
}
struct dirent64 *d;
while ((d = readdir64 (dir)) != NULL)
if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
{
printf ("temp directory contains file \"%s\"\n", d->d_name);
return 1;
}
closedir (dir);
/* Try to create a file. */
int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
if (fd == -1)
{
if (errno == ENOSYS)
{
puts ("*at functions not supported");
return 0;
}
puts ("file creation failed");
return 1;
}
write (fd, "hello", 5);
/* Before closing the file, try using this file descriptor to open
another file. This must fail. */
int fd2 = openat (fd, "should-not-work", O_CREAT|O_RDWR, 0666);
if (fd2 != -1)
{
puts ("openat using descriptor for normal file worked");
return 1;
}
if (errno != ENOTDIR)
{
puts ("error for openat using descriptor for normal file not ENOTDIR ");
return 1;
}
close (fd);
puts ("file created");
/* fdopendir takes over the descriptor, make a copy. */
dupfd = dup (dir_fd);
if (dupfd == -1)
{
puts ("dup failed");
return 1;
}
if (lseek (dupfd, 0, SEEK_SET) != 0)
{
puts ("2nd lseek failed");
return 1;
}
/* The directory should be empty safe the . and .. files. */
dir = fdopendir (dupfd);
if (dir == NULL)
{
puts ("fdopendir failed");
return 1;
}
bool seen_file = false;
while ((d = readdir64 (dir)) != NULL)
if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
{
if (strcmp (d->d_name, "some-file") != 0)
{
printf ("temp directory contains file \"%s\"\n", d->d_name);
return 1;
}
seen_file = true;
}
closedir (dir);
if (!seen_file)
{
puts ("file not created in correct directory");
return 1;
}
int cwdfd = open (".", O_RDONLY | O_DIRECTORY);
if (cwdfd == -1)
{
puts ("cannot get descriptor for cwd");
return 1;
}
if (fchdir (dir_fd) != 0)
{
puts ("1st fchdir failed");
return 1;
}
if (unlink ("some-file") != 0)
{
puts ("unlink failed");
return 1;
}
if (fchdir (cwdfd) != 0)
{
puts ("2nd fchdir failed");
return 1;
}
close (dir_fd);
close (cwdfd);
/* With the file descriptor closed the next call must fail. */
fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
if (fd != -1)
{
puts ("openat using closed descriptor succeeded");
return 1;
}
if (errno != EBADF)
{
puts ("openat using closed descriptor did not set EBADF");
return 1;
}
fd = openat (-1, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
if (fd != -1)
{
puts ("openat using -1 descriptor succeeded");
return 1;
}
if (errno != EBADF)
{
puts ("openat using -1 descriptor did not set EBADF");
return 1;
}
return 0;
}
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