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2a76f4d8c8
- There were a few places in SMBC_getatr() that returned -1 instead of a boolean. -1 was intended to mean error, but that's what False is for, and the usages of this function assume that it returns a boolean with False as the error condition. Derrell
865 lines
24 KiB
C
865 lines
24 KiB
C
/*
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Unix SMB/Netbios implementation.
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SMB client library implementation
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Copyright (C) Andrew Tridgell 1998
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Copyright (C) Richard Sharpe 2000, 2002
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Copyright (C) John Terpstra 2000
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Copyright (C) Tom Jansen (Ninja ISD) 2002
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Copyright (C) Derrell Lipman 2003-2008
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Copyright (C) Jeremy Allison 2007, 2008
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "libsmbclient.h"
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#include "libsmb_internal.h"
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/*
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* Routine to open() a file ...
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*/
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SMBCFILE *
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SMBC_open_ctx(SMBCCTX *context,
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const char *fname,
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int flags,
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mode_t mode)
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{
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char *server = NULL;
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char *share = NULL;
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char *user = NULL;
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char *password = NULL;
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char *workgroup = NULL;
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char *path = NULL;
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char *targetpath = NULL;
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struct cli_state *targetcli = NULL;
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SMBCSRV *srv = NULL;
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SMBCFILE *file = NULL;
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int fd;
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TALLOC_CTX *frame = talloc_stackframe();
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if (!context || !context->internal->initialized) {
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errno = EINVAL; /* Best I can think of ... */
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TALLOC_FREE(frame);
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return NULL;
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}
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if (!fname) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return NULL;
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}
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if (SMBC_parse_path(frame,
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context,
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fname,
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&workgroup,
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&server,
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&share,
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&path,
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&user,
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&password,
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NULL)) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return NULL;
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}
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if (!user || user[0] == (char)0) {
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user = talloc_strdup(frame, smbc_getUser(context));
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if (!user) {
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errno = ENOMEM;
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TALLOC_FREE(frame);
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return NULL;
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}
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}
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srv = SMBC_server(frame, context, True,
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server, share, &workgroup, &user, &password);
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if (!srv) {
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if (errno == EPERM) errno = EACCES;
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TALLOC_FREE(frame);
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return NULL; /* SMBC_server sets errno */
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}
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/* Hmmm, the test for a directory is suspect here ... FIXME */
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if (strlen(path) > 0 && path[strlen(path) - 1] == '\\') {
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fd = -1;
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} else {
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file = SMB_MALLOC_P(SMBCFILE);
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if (!file) {
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errno = ENOMEM;
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TALLOC_FREE(frame);
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return NULL;
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}
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ZERO_STRUCTP(file);
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/*d_printf(">>>open: resolving %s\n", path);*/
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if (!cli_resolve_path(frame, "", srv->cli, path,
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&targetcli, &targetpath)) {
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d_printf("Could not resolve %s\n", path);
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SAFE_FREE(file);
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TALLOC_FREE(frame);
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return NULL;
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}
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/*d_printf(">>>open: resolved %s as %s\n", path, targetpath);*/
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if ((fd = cli_open(targetcli, targetpath, flags,
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context->internal->share_mode)) < 0) {
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/* Handle the error ... */
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SAFE_FREE(file);
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errno = SMBC_errno(context, targetcli);
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TALLOC_FREE(frame);
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return NULL;
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}
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/* Fill in file struct */
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file->cli_fd = fd;
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file->fname = SMB_STRDUP(fname);
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file->srv = srv;
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file->offset = 0;
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file->file = True;
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DLIST_ADD(context->internal->files, file);
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/*
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* If the file was opened in O_APPEND mode, all write
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* operations should be appended to the file. To do that,
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* though, using this protocol, would require a getattrE()
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* call for each and every write, to determine where the end
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* of the file is. (There does not appear to be an append flag
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* in the protocol.) Rather than add all of that overhead of
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* retrieving the current end-of-file offset prior to each
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* write operation, we'll assume that most append operations
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* will continuously write, so we'll just set the offset to
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* the end of the file now and hope that's adequate.
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*
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* Note to self: If this proves inadequate, and O_APPEND
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* should, in some cases, be forced for each write, add a
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* field in the context options structure, for
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* "strict_append_mode" which would select between the current
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* behavior (if FALSE) or issuing a getattrE() prior to each
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* write and forcing the write to the end of the file (if
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* TRUE). Adding that capability will likely require adding
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* an "append" flag into the _SMBCFILE structure to track
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* whether a file was opened in O_APPEND mode. -- djl
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*/
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if (flags & O_APPEND) {
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if (SMBC_lseek_ctx(context, file, 0, SEEK_END) < 0) {
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(void) SMBC_close_ctx(context, file);
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errno = ENXIO;
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TALLOC_FREE(frame);
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return NULL;
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}
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}
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TALLOC_FREE(frame);
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return file;
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}
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/* Check if opendir needed ... */
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if (fd == -1) {
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int eno = 0;
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eno = SMBC_errno(context, srv->cli);
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file = smbc_getFunctionOpendir(context)(context, fname);
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if (!file) errno = eno;
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TALLOC_FREE(frame);
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return file;
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}
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errno = EINVAL; /* FIXME, correct errno ? */
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TALLOC_FREE(frame);
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return NULL;
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}
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/*
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* Routine to create a file
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*/
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SMBCFILE *
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SMBC_creat_ctx(SMBCCTX *context,
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const char *path,
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mode_t mode)
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{
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if (!context || !context->internal->initialized) {
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errno = EINVAL;
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return NULL;
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}
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return SMBC_open_ctx(context, path,
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O_WRONLY | O_CREAT | O_TRUNC, mode);
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}
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/*
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* Routine to read() a file ...
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*/
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ssize_t
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SMBC_read_ctx(SMBCCTX *context,
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SMBCFILE *file,
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void *buf,
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size_t count)
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{
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int ret;
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char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
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char *path = NULL;
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char *targetpath = NULL;
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struct cli_state *targetcli = NULL;
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TALLOC_CTX *frame = talloc_stackframe();
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/*
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* offset:
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*
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* Compiler bug (possibly) -- gcc (GCC) 3.3.5 (Debian 1:3.3.5-2) --
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* appears to pass file->offset (which is type off_t) differently than
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* a local variable of type off_t. Using local variable "offset" in
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* the call to cli_read() instead of file->offset fixes a problem
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* retrieving data at an offset greater than 4GB.
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*/
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off_t offset;
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if (!context || !context->internal->initialized) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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DEBUG(4, ("smbc_read(%p, %d)\n", file, (int)count));
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if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
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errno = EBADF;
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TALLOC_FREE(frame);
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return -1;
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}
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offset = file->offset;
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/* Check that the buffer exists ... */
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if (buf == NULL) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>read: parsing %s\n", file->fname);*/
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if (SMBC_parse_path(frame,
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context,
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file->fname,
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NULL,
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&server,
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&share,
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&path,
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&user,
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&password,
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NULL)) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>read: resolving %s\n", path);*/
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if (!cli_resolve_path(frame, "", file->srv->cli, path,
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&targetcli, &targetpath)) {
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d_printf("Could not resolve %s\n", path);
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
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ret = cli_read(targetcli, file->cli_fd, (char *)buf, offset, count);
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if (ret < 0) {
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errno = SMBC_errno(context, targetcli);
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TALLOC_FREE(frame);
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return -1;
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}
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file->offset += ret;
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DEBUG(4, (" --> %d\n", ret));
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TALLOC_FREE(frame);
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return ret; /* Success, ret bytes of data ... */
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}
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/*
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* Routine to write() a file ...
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*/
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ssize_t
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SMBC_write_ctx(SMBCCTX *context,
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SMBCFILE *file,
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const void *buf,
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size_t count)
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{
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int ret;
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off_t offset;
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char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
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char *path = NULL;
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char *targetpath = NULL;
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struct cli_state *targetcli = NULL;
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TALLOC_CTX *frame = talloc_stackframe();
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/* First check all pointers before dereferencing them */
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if (!context || !context->internal->initialized) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
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errno = EBADF;
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TALLOC_FREE(frame);
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return -1;
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}
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/* Check that the buffer exists ... */
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if (buf == NULL) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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offset = file->offset; /* See "offset" comment in SMBC_read_ctx() */
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/*d_printf(">>>write: parsing %s\n", file->fname);*/
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if (SMBC_parse_path(frame,
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context,
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file->fname,
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NULL,
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&server,
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&share,
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&path,
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&user,
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&password,
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NULL)) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>write: resolving %s\n", path);*/
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if (!cli_resolve_path(frame, "", file->srv->cli, path,
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&targetcli, &targetpath)) {
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d_printf("Could not resolve %s\n", path);
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>write: resolved path as %s\n", targetpath);*/
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ret = cli_write(targetcli, file->cli_fd,
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0, (char *)buf, offset, count);
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if (ret <= 0) {
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errno = SMBC_errno(context, targetcli);
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TALLOC_FREE(frame);
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return -1;
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}
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file->offset += ret;
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TALLOC_FREE(frame);
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return ret; /* Success, 0 bytes of data ... */
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}
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/*
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* Routine to close() a file ...
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*/
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int
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SMBC_close_ctx(SMBCCTX *context,
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SMBCFILE *file)
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{
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SMBCSRV *srv;
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char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
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char *path = NULL;
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char *targetpath = NULL;
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struct cli_state *targetcli = NULL;
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TALLOC_CTX *frame = talloc_stackframe();
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if (!context || !context->internal->initialized) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
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errno = EBADF;
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TALLOC_FREE(frame);
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return -1;
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}
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/* IS a dir ... */
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if (!file->file) {
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TALLOC_FREE(frame);
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return smbc_getFunctionClosedir(context)(context, file);
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}
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/*d_printf(">>>close: parsing %s\n", file->fname);*/
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if (SMBC_parse_path(frame,
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context,
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file->fname,
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NULL,
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&server,
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&share,
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&path,
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&user,
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&password,
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NULL)) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>close: resolving %s\n", path);*/
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if (!cli_resolve_path(frame, "", file->srv->cli, path,
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&targetcli, &targetpath)) {
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d_printf("Could not resolve %s\n", path);
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TALLOC_FREE(frame);
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return -1;
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}
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/*d_printf(">>>close: resolved path as %s\n", targetpath);*/
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if (!cli_close(targetcli, file->cli_fd)) {
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DEBUG(3, ("cli_close failed on %s. purging server.\n",
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file->fname));
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/* Deallocate slot and remove the server
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* from the server cache if unused */
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errno = SMBC_errno(context, targetcli);
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srv = file->srv;
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DLIST_REMOVE(context->internal->files, file);
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SAFE_FREE(file->fname);
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SAFE_FREE(file);
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smbc_getFunctionRemoveUnusedServer(context)(context, srv);
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TALLOC_FREE(frame);
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return -1;
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}
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DLIST_REMOVE(context->internal->files, file);
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SAFE_FREE(file->fname);
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SAFE_FREE(file);
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TALLOC_FREE(frame);
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return 0;
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}
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/*
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* Get info from an SMB server on a file. Use a qpathinfo call first
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* and if that fails, use getatr, as Win95 sometimes refuses qpathinfo
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*/
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bool
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SMBC_getatr(SMBCCTX * context,
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SMBCSRV *srv,
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char *path,
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uint16 *mode,
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SMB_OFF_T *size,
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struct timespec *create_time_ts,
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struct timespec *access_time_ts,
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struct timespec *write_time_ts,
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struct timespec *change_time_ts,
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SMB_INO_T *ino)
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{
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char *fixedpath = NULL;
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char *targetpath = NULL;
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struct cli_state *targetcli = NULL;
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time_t write_time;
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TALLOC_CTX *frame = talloc_stackframe();
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if (!context || !context->internal->initialized) {
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errno = EINVAL;
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TALLOC_FREE(frame);
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return False;
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}
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/* path fixup for . and .. */
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if (strequal(path, ".") || strequal(path, "..")) {
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fixedpath = talloc_strdup(frame, "\\");
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if (!fixedpath) {
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errno = ENOMEM;
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TALLOC_FREE(frame);
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return False;
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}
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} else {
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fixedpath = talloc_strdup(frame, path);
|
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if (!fixedpath) {
|
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errno = ENOMEM;
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TALLOC_FREE(frame);
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return False;
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}
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trim_string(fixedpath, NULL, "\\..");
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trim_string(fixedpath, NULL, "\\.");
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}
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DEBUG(4,("SMBC_getatr: sending qpathinfo\n"));
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|
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if (!cli_resolve_path(frame, "", srv->cli, fixedpath,
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&targetcli, &targetpath)) {
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d_printf("Couldn't resolve %s\n", path);
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TALLOC_FREE(frame);
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return False;
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}
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|
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if (!srv->no_pathinfo2 &&
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cli_qpathinfo2(targetcli, targetpath,
|
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create_time_ts,
|
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access_time_ts,
|
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write_time_ts,
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change_time_ts,
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size, mode, ino)) {
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TALLOC_FREE(frame);
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return True;
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}
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|
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/* if this is NT then don't bother with the getatr */
|
|
if (targetcli->capabilities & CAP_NT_SMBS) {
|
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errno = EPERM;
|
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TALLOC_FREE(frame);
|
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return False;
|
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}
|
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|
|
if (cli_getatr(targetcli, targetpath, mode, size, &write_time)) {
|
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|
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struct timespec w_time_ts;
|
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|
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w_time_ts = convert_time_t_to_timespec(write_time);
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|
|
if (write_time_ts != NULL) {
|
|
*write_time_ts = w_time_ts;
|
|
}
|
|
|
|
if (create_time_ts != NULL) {
|
|
*create_time_ts = w_time_ts;
|
|
}
|
|
|
|
if (access_time_ts != NULL) {
|
|
*access_time_ts = w_time_ts;
|
|
}
|
|
|
|
if (change_time_ts != NULL) {
|
|
*change_time_ts = w_time_ts;
|
|
}
|
|
|
|
srv->no_pathinfo2 = True;
|
|
TALLOC_FREE(frame);
|
|
return True;
|
|
}
|
|
|
|
errno = EPERM;
|
|
TALLOC_FREE(frame);
|
|
return False;
|
|
|
|
}
|
|
|
|
/*
|
|
* Set file info on an SMB server. Use setpathinfo call first. If that
|
|
* fails, use setattrE..
|
|
*
|
|
* Access and modification time parameters are always used and must be
|
|
* provided. Create time, if zero, will be determined from the actual create
|
|
* time of the file. If non-zero, the create time will be set as well.
|
|
*
|
|
* "mode" (attributes) parameter may be set to -1 if it is not to be set.
|
|
*/
|
|
bool
|
|
SMBC_setatr(SMBCCTX * context, SMBCSRV *srv, char *path,
|
|
time_t create_time,
|
|
time_t access_time,
|
|
time_t write_time,
|
|
time_t change_time,
|
|
uint16 mode)
|
|
{
|
|
int fd;
|
|
int ret;
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
|
|
/*
|
|
* First, try setpathinfo (if qpathinfo succeeded), for it is the
|
|
* modern function for "new code" to be using, and it works given a
|
|
* filename rather than requiring that the file be opened to have its
|
|
* attributes manipulated.
|
|
*/
|
|
if (srv->no_pathinfo ||
|
|
! cli_setpathinfo(srv->cli, path,
|
|
create_time,
|
|
access_time,
|
|
write_time,
|
|
change_time,
|
|
mode)) {
|
|
|
|
/*
|
|
* setpathinfo is not supported; go to plan B.
|
|
*
|
|
* cli_setatr() does not work on win98, and it also doesn't
|
|
* support setting the access time (only the modification
|
|
* time), so in all cases, we open the specified file and use
|
|
* cli_setattrE() which should work on all OS versions, and
|
|
* supports both times.
|
|
*/
|
|
|
|
/* Don't try {q,set}pathinfo() again, with this server */
|
|
srv->no_pathinfo = True;
|
|
|
|
/* Open the file */
|
|
if ((fd = cli_open(srv->cli, path, O_RDWR, DENY_NONE)) < 0) {
|
|
|
|
errno = SMBC_errno(context, srv->cli);
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
/* Set the new attributes */
|
|
ret = cli_setattrE(srv->cli, fd,
|
|
change_time,
|
|
access_time,
|
|
write_time);
|
|
|
|
/* Close the file */
|
|
cli_close(srv->cli, fd);
|
|
|
|
/*
|
|
* Unfortunately, setattrE() doesn't have a provision for
|
|
* setting the access mode (attributes). We'll have to try
|
|
* cli_setatr() for that, and with only this parameter, it
|
|
* seems to work on win98.
|
|
*/
|
|
if (ret && mode != (uint16) -1) {
|
|
ret = cli_setatr(srv->cli, path, mode, 0);
|
|
}
|
|
|
|
if (! ret) {
|
|
errno = SMBC_errno(context, srv->cli);
|
|
TALLOC_FREE(frame);
|
|
return False;
|
|
}
|
|
}
|
|
|
|
TALLOC_FREE(frame);
|
|
return True;
|
|
}
|
|
|
|
/*
|
|
* A routine to lseek() a file
|
|
*/
|
|
|
|
off_t
|
|
SMBC_lseek_ctx(SMBCCTX *context,
|
|
SMBCFILE *file,
|
|
off_t offset,
|
|
int whence)
|
|
{
|
|
SMB_OFF_T size;
|
|
char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
|
|
char *path = NULL;
|
|
char *targetpath = NULL;
|
|
struct cli_state *targetcli = NULL;
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
|
|
if (!context || !context->internal->initialized) {
|
|
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
|
|
|
|
errno = EBADF;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
|
|
}
|
|
|
|
if (!file->file) {
|
|
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1; /* Can't lseek a dir ... */
|
|
|
|
}
|
|
|
|
switch (whence) {
|
|
case SEEK_SET:
|
|
file->offset = offset;
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
file->offset += offset;
|
|
break;
|
|
|
|
case SEEK_END:
|
|
/*d_printf(">>>lseek: parsing %s\n", file->fname);*/
|
|
if (SMBC_parse_path(frame,
|
|
context,
|
|
file->fname,
|
|
NULL,
|
|
&server,
|
|
&share,
|
|
&path,
|
|
&user,
|
|
&password,
|
|
NULL)) {
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
/*d_printf(">>>lseek: resolving %s\n", path);*/
|
|
if (!cli_resolve_path(frame, "", file->srv->cli, path,
|
|
&targetcli, &targetpath)) {
|
|
d_printf("Could not resolve %s\n", path);
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
/*d_printf(">>>lseek: resolved path as %s\n", targetpath);*/
|
|
|
|
if (!cli_qfileinfo(targetcli, file->cli_fd, NULL,
|
|
&size, NULL, NULL, NULL, NULL, NULL))
|
|
{
|
|
SMB_OFF_T b_size = size;
|
|
if (!cli_getattrE(targetcli, file->cli_fd,
|
|
NULL, &b_size, NULL, NULL, NULL))
|
|
{
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
} else
|
|
size = b_size;
|
|
}
|
|
file->offset = size + offset;
|
|
break;
|
|
|
|
default:
|
|
errno = EINVAL;
|
|
break;
|
|
|
|
}
|
|
|
|
TALLOC_FREE(frame);
|
|
return file->offset;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Routine to truncate a file given by its file descriptor, to a specified size
|
|
*/
|
|
|
|
int
|
|
SMBC_ftruncate_ctx(SMBCCTX *context,
|
|
SMBCFILE *file,
|
|
off_t length)
|
|
{
|
|
SMB_OFF_T size = length;
|
|
char *server = NULL;
|
|
char *share = NULL;
|
|
char *user = NULL;
|
|
char *password = NULL;
|
|
char *path = NULL;
|
|
char *targetpath = NULL;
|
|
struct cli_state *targetcli = NULL;
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
|
|
if (!context || !context->internal->initialized) {
|
|
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
|
|
errno = EBADF;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
if (!file->file) {
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
/*d_printf(">>>fstat: parsing %s\n", file->fname);*/
|
|
if (SMBC_parse_path(frame,
|
|
context,
|
|
file->fname,
|
|
NULL,
|
|
&server,
|
|
&share,
|
|
&path,
|
|
&user,
|
|
&password,
|
|
NULL)) {
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
/*d_printf(">>>fstat: resolving %s\n", path);*/
|
|
if (!cli_resolve_path(frame, "", file->srv->cli, path,
|
|
&targetcli, &targetpath)) {
|
|
d_printf("Could not resolve %s\n", path);
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
/*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
|
|
|
|
if (!cli_ftruncate(targetcli, file->cli_fd, size)) {
|
|
errno = EINVAL;
|
|
TALLOC_FREE(frame);
|
|
return -1;
|
|
}
|
|
|
|
TALLOC_FREE(frame);
|
|
return 0;
|
|
|
|
}
|