173 lines
3.4 KiB
C
173 lines
3.4 KiB
C
#include <dirent.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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static void prepare (void);
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#define PREPARE(argc, argv) prepare ()
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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static int dir_fd;
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static void
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prepare (void)
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{
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size_t test_dir_len = strlen (test_dir);
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static const char dir_name[] = "/tst-linkat.XXXXXX";
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size_t dirbuflen = test_dir_len + sizeof (dir_name);
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char *dirbuf = malloc (dirbuflen);
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if (dirbuf == NULL)
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{
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puts ("out of memory");
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exit (1);
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}
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snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
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if (mkdtemp (dirbuf) == NULL)
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{
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puts ("cannot create temporary directory");
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exit (1);
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}
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add_temp_file (dirbuf);
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dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
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if (dir_fd == -1)
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{
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puts ("cannot open directory");
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exit (1);
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}
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}
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static int
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do_test (void)
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{
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/* fdopendir takes over the descriptor, make a copy. */
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int dupfd = dup (dir_fd);
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if (dupfd == -1)
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{
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puts ("dup failed");
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return 1;
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}
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if (lseek (dupfd, 0, SEEK_SET) != 0)
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{
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puts ("1st lseek failed");
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return 1;
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}
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/* The directory should be empty safe the . and .. files. */
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DIR *dir = fdopendir (dupfd);
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if (dir == NULL)
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{
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puts ("fdopendir failed");
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return 1;
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}
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struct dirent64 *d;
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while ((d = readdir64 (dir)) != NULL)
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if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
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{
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printf ("temp directory contains file \"%s\"\n", d->d_name);
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return 1;
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}
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closedir (dir);
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/* Try to create a file. */
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int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
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if (fd == -1)
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{
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if (errno == ENOSYS)
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{
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puts ("*at functions not supported");
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return 0;
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}
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puts ("file creation failed");
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return 1;
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}
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write (fd, "hello", 5);
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puts ("file created");
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struct stat64 st1;
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if (fstat64 (fd, &st1) != 0)
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{
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puts ("fstat64 failed");
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return 1;
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}
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close (fd);
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if (linkat (dir_fd, "some-file", dir_fd, "another-file", 0) != 0)
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{
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puts ("symlinkat failed");
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return 1;
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}
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struct stat64 st2;
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if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
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{
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puts ("fstatat64 failed");
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return 1;
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}
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if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
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{
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puts ("file changed after symlinkat");
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return 1;
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}
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if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0)
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{
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puts ("2nd fstatat64 failed");
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return 1;
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}
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if (S_ISLNK (st2.st_mode))
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{
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puts ("2nd fstatat64 shows file is a symlink");
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return 1;
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}
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if (st1.st_dev != st2.st_dev
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|| st1.st_ino != st2.st_ino
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|| st1.st_size != st2.st_size)
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{
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puts ("stat results for linked file do not match");
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return 1;
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}
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if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0)
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{
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puts ("3rd fstatat64 failed");
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return 1;
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}
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if (st1.st_dev != st2.st_dev
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|| st1.st_ino != st2.st_ino
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|| st1.st_size != st2.st_size)
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{
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puts ("stat results do not match");
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return 1;
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}
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if (unlinkat (dir_fd, "another-file", 0) != 0)
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{
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puts ("unlinkat failed");
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return 1;
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}
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if (unlinkat (dir_fd, "some-file", 0) != 0)
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{
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puts ("2nd unlinkat failed");
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return 1;
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}
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close (dir_fd);
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return 0;
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}
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