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* io/fcntl.h: Declare openat and openat64.
* io/Makefile (routines): Add openat and openat64. (tests): Add tst-openat. * io/Versions: Add openat and openat64 for GLIBC_2.4. * sysdeps/generic/openat.c: New file. * sysdeps/generic/openat64.c: New file. * sysdeps/unix/sysv/linux/openat.c: New file. * sysdeps/unix/sysv/linux/openat64.c: New file. * io/tst-openat.c: New file. * sysdeps/unix/sysv/linux/device-nrs.h: Add info for /dev/full.
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Ulrich Drepper
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Nov 10, 2005
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -97,4 +97,7 @@ libc { | |
| # n* | ||
| nftw; nftw64; | ||
| } | ||
| GLIBC_2.4 { | ||
| openat; openat64; | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| #include <dirent.h> | ||
| #include <fcntl.h> | ||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include <unistd.h> | ||
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| static void prepare (void); | ||
| #define PREPARE(argc, argv) prepare () | ||
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| static int do_test (void); | ||
| #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 | ||
| prepare (void) | ||
| { | ||
| size_t test_dir_len = strlen (test_dir); | ||
| static const char dir_name[] = "/tst-openat.XXXXXX"; | ||
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| size_t dirbuflen = test_dir_len + sizeof (dir_name); | ||
| char *dirbuf = malloc (dirbuflen); | ||
| if (dirbuf == NULL) | ||
| { | ||
| puts ("out of memory"); | ||
| exit (1); | ||
| } | ||
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| snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name); | ||
| if (mkdtemp (dirbuf) == NULL) | ||
| { | ||
| puts ("cannot create temporary directory"); | ||
| exit (1); | ||
| } | ||
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| add_temp_file (dirbuf); | ||
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| dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY); | ||
| if (dir_fd == -1) | ||
| { | ||
| puts ("cannot open directory"); | ||
| exit (1); | ||
| } | ||
| } | ||
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| 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; | ||
| } | ||
|
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| /* 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); | ||
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| /* Try to create a file. */ | ||
| int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | ||
| if (fd == -1) | ||
| { | ||
| puts ("file creation failed"); | ||
| return 1; | ||
| } | ||
| write (fd, "hello", 5); | ||
| close (fd); | ||
| puts ("file created"); | ||
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| /* fdopendir takes over the descriptor, make a copy. */ | ||
| dupfd = dup (dir_fd); | ||
| if (dupfd == -1) | ||
| { | ||
| puts ("dup failed"); | ||
| return 1; | ||
| } | ||
| if (lseek (dupfd, 0, SEEK_SET) != 0) | ||
| { | ||
| puts ("2nd lseek failed"); | ||
| return 1; | ||
| } | ||
|
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||
| /* The directory should be empty safe the . and .. files. */ | ||
| dir = fdopendir (dupfd); | ||
| if (dir == NULL) | ||
| { | ||
| puts ("fdopendir failed"); | ||
| return 1; | ||
| } | ||
| bool seen_file = false; | ||
| while ((d = readdir64 (dir)) != NULL) | ||
| if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | ||
| { | ||
| if (strcmp (d->d_name, "some-file") != 0) | ||
| { | ||
| printf ("temp directory contains file \"%s\"\n", d->d_name); | ||
| return 1; | ||
| } | ||
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| seen_file = true; | ||
| } | ||
| closedir (dir); | ||
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| if (!seen_file) | ||
| { | ||
| puts ("file not created in correct directory"); | ||
| return 1; | ||
| } | ||
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| int cwdfd = open (".", O_RDONLY | O_DIRECTORY); | ||
| if (cwdfd == -1) | ||
| { | ||
| puts ("cannot get descriptor for cwd"); | ||
| return 1; | ||
| } | ||
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| if (fchdir (dir_fd) != 0) | ||
| { | ||
| puts ("1st fchdir failed"); | ||
| return 1; | ||
| } | ||
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| if (unlink ("some-file") != 0) | ||
| { | ||
| puts ("unlink failed"); | ||
| return 1; | ||
| } | ||
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| if (fchdir (cwdfd) != 0) | ||
| { | ||
| puts ("2nd fchdir failed"); | ||
| return 1; | ||
| } | ||
|
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| close (dir_fd); | ||
| close (cwdfd); | ||
|
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||
| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* Copyright (C) 2005 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| The GNU C Library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public | ||
| License as published by the Free Software Foundation; either | ||
| version 2.1 of the License, or (at your option) any later version. | ||
| The GNU C Library is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with the GNU C Library; if not, write to the Free | ||
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
| 02111-1307 USA. */ | ||
|
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||
| #include <errno.h> | ||
| #include <fcntl.h> | ||
| #include <stdarg.h> | ||
| #include <stddef.h> | ||
| #include <sys/stat.h> | ||
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| /* Open FILE with access OFLAG. Interpret relative paths relative to | ||
| the directory associated with FD. If OFLAG includes O_CREAT, a | ||
| third argument is the file protection. */ | ||
| int | ||
| openat (fd, file, oflag) | ||
| int fd; | ||
| const char *file; | ||
| int oflag; | ||
| { | ||
| int mode; | ||
|
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||
| if (file == NULL) | ||
| { | ||
| __set_errno (EINVAL); | ||
| return -1; | ||
| } | ||
|
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| if (file[0] != '/') | ||
| { | ||
| /* Check FD is associated with a directory. */ | ||
| struct stat64 st; | ||
| if (__fxstat64 (_STAT_VER, fd, &st) != 0) | ||
| return -1; | ||
|
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||
| if (!S_ISDIR (st.st_mode)) | ||
| { | ||
| __set_errno (ENOTDIR); | ||
| return -1; | ||
| } | ||
| } | ||
|
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| if (oflag & O_CREAT) | ||
| { | ||
| va_list arg; | ||
| va_start (arg, oflag); | ||
| mode = va_arg (arg, int); | ||
| va_end (arg); | ||
| } | ||
|
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| __set_errno (ENOSYS); | ||
| return -1; | ||
| } | ||
| stub_warning (openat) | ||
|
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| #include <stub-tag.h> |
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