| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | POSIX NTVFS backend - seek
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| 5 |
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| 6 | Copyright (C) Andrew Tridgell 2004
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 | #include "vfs_posix.h"
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| 24 |
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| 25 | /*
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| 26 | seek in a file
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| 27 | */
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| 28 | NTSTATUS pvfs_seek(struct ntvfs_module_context *ntvfs,
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| 29 | struct ntvfs_request *req,
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| 30 | union smb_seek *io)
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| 31 | {
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| 32 | struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
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| 33 | struct pvfs_state);
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| 34 | struct pvfs_file *f;
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| 35 | struct pvfs_file_handle *h;
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| 36 | NTSTATUS status;
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| 37 |
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| 38 | f = pvfs_find_fd(pvfs, req, io->lseek.in.file.ntvfs);
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| 39 | if (!f) {
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| 40 | return NT_STATUS_INVALID_HANDLE;
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| 41 | }
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| 42 | h = f->handle;
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| 43 |
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| 44 | status = NT_STATUS_OK;
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| 45 |
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| 46 | switch (io->lseek.in.mode) {
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| 47 | case SEEK_MODE_START:
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| 48 | h->seek_offset = io->lseek.in.offset;
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| 49 | break;
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| 50 |
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| 51 | case SEEK_MODE_CURRENT:
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| 52 | h->seek_offset += io->lseek.in.offset;
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| 53 | break;
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| 54 |
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| 55 | case SEEK_MODE_END:
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| 56 | status = pvfs_resolve_name_fd(pvfs, h->fd, h->name, PVFS_RESOLVE_NO_OPENDB);
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| 57 | h->seek_offset = h->name->st.st_size + io->lseek.in.offset;
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| 58 | break;
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| 59 | }
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| 60 |
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| 61 | io->lseek.out.offset = h->seek_offset;
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| 62 |
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| 63 | return status;
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| 64 | }
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| 65 |
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