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#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.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-symlinkat.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);
static const char symlinkcontent[] = "some-file";
if (symlinkat (symlinkcontent, dir_fd, "another-file") != 0)
{
puts ("symlinkat failed");
return 1;
}
struct stat64 st2;
if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0)
{
puts ("fstatat64 failed");
return 1;
}
if (!S_ISLNK (st2.st_mode))
{
puts ("2nd fstatat64 does not show file is a symlink");
return 1;
}
if (fstatat64 (dir_fd, symlinkcontent, &st2, AT_SYMLINK_NOFOLLOW) == 0)
{
puts ("2nd fstatat64 succeeded");
return 1;
}
char buf[100];
int n = readlinkat (dir_fd, "another-file", buf, sizeof (buf));
if (n == -1)
{
puts ("readlinkat failed");
return 1;
}
if (n != sizeof (symlinkcontent) - 1)
{
printf ("readlinkat returned %d, expected %zu\n",
n, sizeof (symlinkcontent) - 1);
return 1;
}
if (strncmp (buf, symlinkcontent, n) != 0)
{
puts ("readlinkat retrieved wrong link content");
return 1;
}
if (unlinkat (dir_fd, "another-file", 0) != 0)
{
puts ("unlinkat failed");
return 1;
}
close (dir_fd);
return 0;
}
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