mirror of git://sourceware.org/git/glibc.git
138 lines
2.8 KiB
C
138 lines
2.8 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-symlinkat.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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static const char symlinkcontent[] = "some-file";
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if (symlinkat (symlinkcontent, dir_fd, "another-file") != 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, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 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 (!S_ISLNK (st2.st_mode))
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{
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puts ("2nd fstatat64 does not show file is a symlink");
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return 1;
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}
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if (fstatat64 (dir_fd, symlinkcontent, &st2, AT_SYMLINK_NOFOLLOW) == 0)
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{
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puts ("2nd fstatat64 succeeded");
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return 1;
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}
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char buf[100];
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int n = readlinkat (dir_fd, "another-file", buf, sizeof (buf));
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if (n == -1)
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{
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puts ("readlinkat failed");
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return 1;
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}
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if (n != sizeof (symlinkcontent) - 1)
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{
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printf ("readlinkat returned %d, expected %zu\n",
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n, sizeof (symlinkcontent) - 1);
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return 1;
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}
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if (strncmp (buf, symlinkcontent, n) != 0)
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{
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puts ("readlinkat retrieved wrong link content");
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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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close (dir_fd);
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return 0;
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}
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