diff options
Diffstat (limited to 'hurd/xattr.c')
| -rw-r--r-- | hurd/xattr.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/hurd/xattr.c b/hurd/xattr.c deleted file mode 100644 index cf3e22d..0000000 --- a/hurd/xattr.c +++ /dev/null @@ -1,201 +0,0 @@ -/* Support for *xattr interfaces on GNU/Hurd. - Copyright (C) 2006 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. */ - -#include <hurd.h> -#include <hurd/xattr.h> -#include <string.h> -#include <sys/mman.h> - -/* Right now we support only a fixed set of xattr names for Hurd features. - There are no RPC interfaces for free-form xattr names and values. - - Name Value encoding - ---- ----- -------- - gnu.author empty if st_author==st_uid - uid_t giving st_author value - gnu.translator empty if no passive translator - translator and arguments: "/hurd/foo\0arg1\0arg2\0" -*/ - -error_t -_hurd_xattr_get (io_t port, const char *name, void *value, size_t *size) -{ - if (strncmp (name, "gnu.", 4)) - return EOPNOTSUPP; - name += 4; - - if (!strcmp (name, "author")) - { - struct stat64 st; - error_t err = __io_stat (port, &st); - if (err) - return err; - if (st.st_author == st.st_uid) - *size = 0; - else if (value) - { - if (*size < sizeof st.st_author) - return ERANGE; - memcpy (value, &st.st_author, sizeof st.st_author); - } - *size = sizeof st.st_author; - return 0; - } - - if (!strcmp (name, "translator")) - { - char *buf = value; - size_t bufsz = value ? *size : 0; - error_t err = __file_get_translator (port, &buf, &bufsz); - if (err) - return err; - if (value != NULL && *size < bufsz) - { - if (buf != value) - munmap (buf, bufsz); - return -ERANGE; - } - if (buf != value && bufsz > 0) - { - if (value != NULL) - memcpy (value, buf, bufsz); - munmap (buf, bufsz); - } - *size = bufsz; - return 0; - } - - return EOPNOTSUPP; -} - -error_t -_hurd_xattr_set (io_t port, const char *name, const void *value, size_t size, - int flags) -{ - if (strncmp (name, "gnu.", 4)) - return EOPNOTSUPP; - name += 4; - - if (!strcmp (name, "author")) - switch (size) - { - default: - return EINVAL; - case 0: /* "Clear" author by setting to st_uid. */ - { - struct stat64 st; - error_t err = __io_stat (port, &st); - if (err) - return err; - if (st.st_author == st.st_uid) - { - /* Nothing to do. */ - if (flags & XATTR_REPLACE) - return ENODATA; - return 0; - } - if (flags & XATTR_CREATE) - return EEXIST; - return __file_chauthor (port, st.st_uid); - } - case sizeof (uid_t): /* Set the author. */ - { - uid_t id; - memcpy (&id, value, sizeof id); - if (flags & (XATTR_CREATE|XATTR_REPLACE)) - { - struct stat64 st; - error_t err = __io_stat (port, &st); - if (err) - return err; - if (st.st_author == st.st_uid) - { - if (flags & XATTR_REPLACE) - return ENODATA; - } - else if (flags & XATTR_CREATE) - return EEXIST; - if (st.st_author == id) - /* Nothing to do. */ - return 0; - } - return __file_chauthor (port, id); - } - } - - if (!strcmp (name, "translator")) - { - if (flags & XATTR_REPLACE) - { - /* Must make sure it's already there. */ - char *buf = NULL; - size_t bufsz = 0; - error_t err = __file_get_translator (port, &buf, &bufsz); - if (err) - return err; - if (bufsz > 0) - { - munmap (buf, bufsz); - return ENODATA; - } - } - return __file_set_translator (port, - FS_TRANS_SET | ((flags & XATTR_CREATE) - ? FS_TRANS_EXCL : 0), 0, 0, - value, size, - MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); - } - - return EOPNOTSUPP; -} - -error_t -_hurd_xattr_remove (io_t port, const char *name) -{ - return _hurd_xattr_set (port, name, NULL, 0, XATTR_REPLACE); -} - -error_t -_hurd_xattr_list (io_t port, void *buffer, size_t *size) -{ - size_t total = 0; - char *bufp = buffer; - inline void add (const char *name, size_t len) - { - total += len; - if (bufp != NULL && total <= *size) - bufp = __mempcpy (bufp, name, len); - } -#define add(s) add (s, sizeof s) - - struct stat64 st; - error_t err = __io_stat (port, &st); - if (err) - return err; - - if (st.st_author != st.st_uid) - add ("gnu.author"); - if (st.st_mode & S_IPTRANS) - add ("gnu.translator"); - - if (buffer != NULL && total > *size) - return ERANGE; - *size = total; - return 0; -} |