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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
commit | 8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch) | |
tree | 4099e8021376c7d8c05bdf8503093d80e9c7bad0 /source4/ntvfs/posix/xattr_system.c | |
parent | Initial commit. (diff) | |
download | samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip |
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source4/ntvfs/posix/xattr_system.c')
-rw-r--r-- | source4/ntvfs/posix/xattr_system.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/xattr_system.c b/source4/ntvfs/posix/xattr_system.c new file mode 100644 index 0000000..ebb2010 --- /dev/null +++ b/source4/ntvfs/posix/xattr_system.c @@ -0,0 +1,145 @@ +/* + Unix SMB/CIFS implementation. + + POSIX NTVFS backend - xattr support using filesystem xattrs + + Copyright (C) Andrew Tridgell 2004 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "vfs_posix.h" + +/* + pull a xattr as a blob, from either a file or a file descriptor +*/ +NTSTATUS pull_xattr_blob_system(struct pvfs_state *pvfs, + TALLOC_CTX *mem_ctx, + const char *attr_name, + const char *fname, + int fd, + size_t estimated_size, + DATA_BLOB *blob) +{ + int ret; + + *blob = data_blob_talloc(mem_ctx, NULL, estimated_size+16); + if (blob->data == NULL) { + return NT_STATUS_NO_MEMORY; + } + +again: + if (fd != -1) { + ret = fgetxattr(fd, attr_name, blob->data, estimated_size); + } else { + ret = getxattr(fname, attr_name, blob->data, estimated_size); + } + if (ret == -1 && errno == ERANGE) { + estimated_size *= 2; + blob->data = talloc_realloc(mem_ctx, blob->data, + uint8_t, estimated_size); + if (blob->data == NULL) { + return NT_STATUS_NO_MEMORY; + } + blob->length = estimated_size; + goto again; + } + if (ret == -1 && errno == EPERM) { + struct stat statbuf; + + if (fd != -1) { + ret = fstat(fd, &statbuf); + } else { + ret = stat(fname, &statbuf); + } + if (ret == 0) { + /* check if this is a directory and the sticky bit is set */ + if (S_ISDIR(statbuf.st_mode) && (statbuf.st_mode & S_ISVTX)) { + /* pretend we could not find the xattr */ + + data_blob_free(blob); + return NT_STATUS_NOT_FOUND; + + } else { + /* if not this was probably a legitimate error + * reset ret and errno to the correct values */ + errno = EPERM; + ret = -1; + } + } + } + + if (ret == -1) { + data_blob_free(blob); + return pvfs_map_errno(pvfs, errno); + } + + blob->length = ret; + + return NT_STATUS_OK; +} + +/* + push a xattr as a blob, from either a file or a file descriptor +*/ +NTSTATUS push_xattr_blob_system(struct pvfs_state *pvfs, + const char *attr_name, + const char *fname, + int fd, + const DATA_BLOB *blob) +{ + int ret; + + if (fd != -1) { + ret = fsetxattr(fd, attr_name, blob->data, blob->length, 0); + } else { + ret = setxattr(fname, attr_name, blob->data, blob->length, 0); + } + if (ret == -1) { + return pvfs_map_errno(pvfs, errno); + } + + return NT_STATUS_OK; +} + + +/* + delete a xattr +*/ +NTSTATUS delete_xattr_system(struct pvfs_state *pvfs, const char *attr_name, + const char *fname, int fd) +{ + int ret; + + if (fd != -1) { + ret = fremovexattr(fd, attr_name); + } else { + ret = removexattr(fname, attr_name); + } + if (ret == -1) { + return pvfs_map_errno(pvfs, errno); + } + + return NT_STATUS_OK; +} + +/* + unlink a file - cleanup any xattrs +*/ +NTSTATUS unlink_xattr_system(struct pvfs_state *pvfs, const char *fname) +{ + /* nothing needs to be done for filesystem based xattrs */ + return NT_STATUS_OK; +} |