195 lines
3.9 KiB
C
195 lines
3.9 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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#if _POSIX_CHOWN_RESTRICTED == 0
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if (pathconf (test_dir, _PC_CHOWN_RESTRICTED) != 0)
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#endif
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{
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uid_t uid = getuid ();
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if (uid != 0)
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{
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puts ("need root privileges");
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exit (0);
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}
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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-fchownat.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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/* Before closing the file, try using this file descriptor to open
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another file. This must fail. */
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if (fchownat (fd, "some-file", 1, 1, 0) != -1)
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{
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puts ("fchownat using descriptor for normal file worked");
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return 1;
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}
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if (errno != ENOTDIR)
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{
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puts ("\
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error for fchownat using descriptor for normal file not ENOTDIR ");
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return 1;
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}
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close (fd);
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if (fchownat (dir_fd, "some-file", st1.st_uid + 1, st1.st_gid + 1, 0) != 0)
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{
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puts ("fchownat 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_uid + 1 != st2.st_uid || st1.st_gid + 1 != st2.st_gid)
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{
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puts ("owner change 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 ("unlinkat failed");
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return 1;
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}
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/* Create a file descriptor which is closed again right away. */
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int dir_fd2 = dup (dir_fd);
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if (dir_fd2 == -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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close (dir_fd2);
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if (fchownat (dir_fd2, "some-file", 1, 1, 0) != -1)
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{
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puts ("fchownat using closed descriptor worked");
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return 1;
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}
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if (errno != EBADF)
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{
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puts ("error for fchownat using closed descriptor not EBADF ");
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return 1;
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}
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close (dir_fd);
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if (fchownat (-1, "some-file", 1, 1, 0) != -1)
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{
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puts ("fchownat using invalid descriptor worked");
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return 1;
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}
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if (errno != EBADF)
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{
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puts ("error for fchownat using invalid descriptor not EBADF ");
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return 1;
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}
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return 0;
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}
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