diff options
Diffstat (limited to 'io/tst-linkat.c')
| -rw-r--r-- | io/tst-linkat.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/io/tst-linkat.c b/io/tst-linkat.c new file mode 100644 index 0000000000..d63c982751 --- /dev/null +++ b/io/tst-linkat.c @@ -0,0 +1,171 @@ +#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-linkat.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); + puts ("file created"); + + struct stat64 st1; + if (fstat64 (fd, &st1) != 0) + { + puts ("fstat64 failed"); + return 1; + } + + close (fd); + + if (linkat (dir_fd, "some-file", dir_fd, "another-file", 0) != 0) + { + puts ("symlinkat failed"); + return 1; + } + + struct stat64 st2; + if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0) + { + puts ("fstatat64 failed"); + return 1; + } + if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) + { + puts ("file changed after symlinkat"); + return 1; + } + + if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0) + { + puts ("2nd fstatat64 failed"); + return 1; + } + if (S_ISLNK (st2.st_mode)) + { + puts ("2nd fstatat64 shows file is a symlink"); + return 1; + } + if (st1.st_dev != st2.st_dev + || st1.st_ino != st2.st_ino + || st1.st_size != st2.st_size) + { + puts ("stat results for linked file do not match"); + return 1; + } + + if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0) + { + puts ("3rd fstatat64 failed"); + return 1; + } + if (st1.st_dev != st2.st_dev + || st1.st_ino != st2.st_ino + || st1.st_size != st2.st_size) + { + puts ("stat results do not match"); + return 1; + } + + if (unlinkat (dir_fd, "another-file", 0) != 0) + { + puts ("unlinkat failed"); + return 1; + } + if (unlinkat (dir_fd, "some-file", 0) != 0) + { + puts ("2nd unlinkat failed"); + return 1; + } + + close (dir_fd); + + return 0; +} |