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Diffstat (limited to 'source3/libsmb/libsmb_file.c')
-rw-r--r--source3/libsmb/libsmb_file.c797
1 files changed, 797 insertions, 0 deletions
diff --git a/source3/libsmb/libsmb_file.c b/source3/libsmb/libsmb_file.c
new file mode 100644
index 0000000..9875075
--- /dev/null
+++ b/source3/libsmb/libsmb_file.c
@@ -0,0 +1,797 @@
+/*
+ Unix SMB/Netbios implementation.
+ SMB client library implementation
+ Copyright (C) Andrew Tridgell 1998
+ Copyright (C) Richard Sharpe 2000, 2002
+ Copyright (C) John Terpstra 2000
+ Copyright (C) Tom Jansen (Ninja ISD) 2002
+ Copyright (C) Derrell Lipman 2003-2008
+ Copyright (C) Jeremy Allison 2007, 2008
+
+ 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 "libsmb/libsmb.h"
+#include "libsmbclient.h"
+#include "libsmb_internal.h"
+#include "../libcli/smb/smbXcli_base.h"
+
+/*
+ * Routine to open() a file ...
+ */
+
+SMBCFILE *
+SMBC_open_ctx(SMBCCTX *context,
+ const char *fname,
+ int flags,
+ mode_t mode)
+{
+ char *server = NULL;
+ char *share = NULL;
+ char *user = NULL;
+ char *password = NULL;
+ char *workgroup = NULL;
+ char *path = NULL;
+ char *targetpath = NULL;
+ struct cli_state *targetcli = NULL;
+ SMBCSRV *srv = NULL;
+ SMBCFILE *file = NULL;
+ uint16_t fd;
+ uint16_t port = 0;
+ NTSTATUS status = NT_STATUS_OBJECT_PATH_INVALID;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL; /* Best I can think of ... */
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ if (!fname) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ if (SMBC_parse_path(frame,
+ context,
+ fname,
+ &workgroup,
+ &server,
+ &port,
+ &share,
+ &path,
+ &user,
+ &password,
+ NULL)) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ if (!user || user[0] == (char)0) {
+ user = talloc_strdup(frame, smbc_getUser(context));
+ if (!user) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ }
+
+ srv = SMBC_server(frame, context, True,
+ server, port, share, &workgroup, &user, &password);
+ if (!srv) {
+ if (errno == EPERM) errno = EACCES;
+ TALLOC_FREE(frame);
+ return NULL; /* SMBC_server sets errno */
+ }
+
+ /* Hmmm, the test for a directory is suspect here ... FIXME */
+
+ if (strlen(path) > 0 && path[strlen(path) - 1] == '\\') {
+ status = NT_STATUS_OBJECT_PATH_INVALID;
+ } else {
+ struct cli_credentials *creds = NULL;
+
+ file = SMB_MALLOC_P(SMBCFILE);
+ if (!file) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ ZERO_STRUCTP(file);
+
+ creds = context->internal->creds;
+ /*d_printf(">>>open: resolving %s\n", path);*/
+ status = cli_resolve_path(
+ frame, "",
+ creds,
+ srv->cli, path, &targetcli, &targetpath);
+ if (!NT_STATUS_IS_OK(status)) {
+ d_printf("Could not resolve %s\n", path);
+ errno = ENOENT;
+ SAFE_FREE(file);
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ /*d_printf(">>>open: resolved %s as %s\n", path, targetpath);*/
+
+ status = cli_open(targetcli, targetpath, flags,
+ context->internal->share_mode, &fd);
+ if (!NT_STATUS_IS_OK(status)) {
+
+ /* Handle the error ... */
+
+ SAFE_FREE(file);
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ return NULL;
+ }
+
+ /* Fill in file struct */
+
+ file->cli_fd = fd;
+ file->fname = SMB_STRDUP(fname);
+ file->srv = srv;
+ file->offset = 0;
+ file->file = True;
+ /*
+ * targetcli is either equal to srv->cli or
+ * is a subsidiary DFS connection. Either way
+ * file->cli_fd belongs to it so we must cache
+ * it for read/write/close, not re-resolve each time.
+ * Re-resolving is both slow and incorrect.
+ */
+ file->targetcli = targetcli;
+
+ DLIST_ADD(context->internal->files, file);
+
+ /*
+ * If the file was opened in O_APPEND mode, all write
+ * operations should be appended to the file. To do that,
+ * though, using this protocol, would require a getattrE()
+ * call for each and every write, to determine where the end
+ * of the file is. (There does not appear to be an append flag
+ * in the protocol.) Rather than add all of that overhead of
+ * retrieving the current end-of-file offset prior to each
+ * write operation, we'll assume that most append operations
+ * will continuously write, so we'll just set the offset to
+ * the end of the file now and hope that's adequate.
+ *
+ * Note to self: If this proves inadequate, and O_APPEND
+ * should, in some cases, be forced for each write, add a
+ * field in the context options structure, for
+ * "strict_append_mode" which would select between the current
+ * behavior (if FALSE) or issuing a getattrE() prior to each
+ * write and forcing the write to the end of the file (if
+ * TRUE). Adding that capability will likely require adding
+ * an "append" flag into the _SMBCFILE structure to track
+ * whether a file was opened in O_APPEND mode. -- djl
+ */
+ if (flags & O_APPEND) {
+ if (SMBC_lseek_ctx(context, file, 0, SEEK_END) < 0) {
+ (void) SMBC_close_ctx(context, file);
+ errno = ENXIO;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ }
+
+ TALLOC_FREE(frame);
+ return file;
+ }
+
+ /* Check if opendir needed ... */
+
+ if (!NT_STATUS_IS_OK(status)) {
+ file = smbc_getFunctionOpendir(context)(context, fname);
+ TALLOC_FREE(frame);
+ if (file == NULL) {
+ errno = cli_status_to_errno(status);
+ }
+ return file;
+ }
+
+ errno = EINVAL; /* FIXME, correct errno ? */
+ TALLOC_FREE(frame);
+ return NULL;
+}
+
+/*
+ * Routine to create a file
+ */
+
+SMBCFILE *
+SMBC_creat_ctx(SMBCCTX *context,
+ const char *path,
+ mode_t mode)
+{
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ return SMBC_open_ctx(context, path,
+ O_WRONLY | O_CREAT | O_TRUNC, mode);
+}
+
+/*
+ * Routine to read() a file ...
+ */
+
+ssize_t
+SMBC_read_ctx(SMBCCTX *context,
+ SMBCFILE *file,
+ void *buf,
+ size_t count)
+{
+ size_t ret;
+ TALLOC_CTX *frame = talloc_stackframe();
+ NTSTATUS status;
+
+ /*
+ * offset:
+ *
+ * Compiler bug (possibly) -- gcc (GCC) 3.3.5 (Debian 1:3.3.5-2) --
+ * appears to pass file->offset (which is type off_t) differently than
+ * a local variable of type off_t. Using local variable "offset" in
+ * the call to cli_read() instead of file->offset fixes a problem
+ * retrieving data at an offset greater than 4GB.
+ */
+ off_t offset;
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ DEBUG(4, ("smbc_read(%p, %zu)\n", file, count));
+
+ if (!SMBC_dlist_contains(context->internal->files, file)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ offset = file->offset;
+
+ /* Check that the buffer exists ... */
+
+ if (buf == NULL) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ status = cli_read(file->targetcli, file->cli_fd, (char *)buf, offset,
+ count, &ret);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ return -1;
+ }
+
+ file->offset += ret;
+
+ DEBUG(4, (" --> %zu\n", ret));
+
+ TALLOC_FREE(frame);
+ return ret; /* Success, ret bytes of data ... */
+}
+
+off_t
+SMBC_splice_ctx(SMBCCTX *context,
+ SMBCFILE *srcfile,
+ SMBCFILE *dstfile,
+ off_t count,
+ int (*splice_cb)(off_t n, void *priv),
+ void *priv)
+{
+ off_t written = 0;
+ TALLOC_CTX *frame = talloc_stackframe();
+ NTSTATUS status;
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!SMBC_dlist_contains(context->internal->files, srcfile)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!SMBC_dlist_contains(context->internal->files, dstfile)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ status = cli_splice(srcfile->targetcli, dstfile->targetcli,
+ srcfile->cli_fd, dstfile->cli_fd,
+ count, srcfile->offset, dstfile->offset, &written,
+ splice_cb, priv);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ return -1;
+ }
+
+ srcfile->offset += written;
+ dstfile->offset += written;
+
+ TALLOC_FREE(frame);
+ return written;
+}
+
+/*
+ * Routine to write() a file ...
+ */
+
+ssize_t
+SMBC_write_ctx(SMBCCTX *context,
+ SMBCFILE *file,
+ const void *buf,
+ size_t count)
+{
+ off_t offset;
+ TALLOC_CTX *frame = talloc_stackframe();
+ NTSTATUS status;
+
+ /* First check all pointers before dereferencing them */
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!SMBC_dlist_contains(context->internal->files, file)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ /* Check that the buffer exists ... */
+
+ if (buf == NULL) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ offset = file->offset; /* See "offset" comment in SMBC_read_ctx() */
+
+ status = cli_writeall(file->targetcli, file->cli_fd,
+ 0, (const uint8_t *)buf, offset, count, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ errno = map_errno_from_nt_status(status);
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ file->offset += count;
+
+ TALLOC_FREE(frame);
+ return count; /* Success, 0 bytes of data ... */
+}
+
+/*
+ * Routine to close() a file ...
+ */
+
+int
+SMBC_close_ctx(SMBCCTX *context,
+ SMBCFILE *file)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ NTSTATUS status;
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!SMBC_dlist_contains(context->internal->files, file)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ /* IS a dir ... */
+ if (!file->file) {
+ TALLOC_FREE(frame);
+ return smbc_getFunctionClosedir(context)(context, file);
+ }
+
+ status = cli_close(file->targetcli, file->cli_fd);
+ if (!NT_STATUS_IS_OK(status)) {
+ SMBCSRV *srv;
+ DEBUG(3, ("cli_close failed on %s. purging server.\n",
+ file->fname));
+ /* Deallocate slot and remove the server
+ * from the server cache if unused */
+ srv = file->srv;
+ DLIST_REMOVE(context->internal->files, file);
+ SAFE_FREE(file->fname);
+ SAFE_FREE(file);
+ smbc_getFunctionRemoveUnusedServer(context)(context, srv);
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ return -1;
+ }
+
+ DLIST_REMOVE(context->internal->files, file);
+ SAFE_FREE(file->fname);
+ SAFE_FREE(file);
+ TALLOC_FREE(frame);
+ return 0;
+}
+
+/*
+ * Get info from an SMB server on a file. Use a qpathinfo call first
+ * and if that fails, use getatr, as Win95 sometimes refuses qpathinfo
+ */
+NTSTATUS
+SMBC_getatr(SMBCCTX * context,
+ SMBCSRV *srv,
+ const char *path,
+ struct stat *sb)
+{
+ char *fixedpath = NULL;
+ char *targetpath = NULL;
+ struct cli_state *targetcli = NULL;
+ uint32_t attr = 0;
+ off_t size = 0;
+ struct timespec create_time_ts = {0};
+ struct timespec access_time_ts = {0};
+ struct timespec write_time_ts = {0};
+ struct timespec change_time_ts = {0};
+ struct timespec w_time_ts = {0};
+ time_t write_time = 0;
+ SMB_INO_T ino = 0;
+ struct cli_credentials *creds = NULL;
+ TALLOC_CTX *frame = talloc_stackframe();
+ NTSTATUS status;
+
+ if (!context || !context->internal->initialized) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* path fixup for . and .. */
+ if (ISDOT(path) || ISDOTDOT(path)) {
+ fixedpath = talloc_strdup(frame, "\\");
+ if (!fixedpath) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_NO_MEMORY;
+ }
+ } else {
+ fixedpath = talloc_strdup(frame, path);
+ if (!fixedpath) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_NO_MEMORY;
+ }
+ trim_string(fixedpath, NULL, "\\..");
+ trim_string(fixedpath, NULL, "\\.");
+ }
+ DEBUG(4,("SMBC_getatr: sending qpathinfo\n"));
+
+ creds = context->internal->creds;
+
+ status = cli_resolve_path(frame, "",
+ creds,
+ srv->cli, fixedpath,
+ &targetcli, &targetpath);
+ if (!NT_STATUS_IS_OK(status)) {
+ d_printf("Couldn't resolve %s\n", path);
+ TALLOC_FREE(frame);
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ if (!srv->no_pathinfo2) {
+ bool not_supported_error = false;
+ status = cli_qpathinfo2(targetcli,
+ targetpath,
+ &create_time_ts,
+ &access_time_ts,
+ &write_time_ts,
+ &change_time_ts,
+ &size,
+ &attr,
+ &ino);
+ if (NT_STATUS_IS_OK(status)) {
+ goto setup_stat;
+ }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
+ not_supported_error = true;
+ }
+ if (!not_supported_error) {
+ /* "Normal error". Just return it to caller. */
+ TALLOC_FREE(frame);
+ return status;
+ }
+ }
+
+ srv->no_pathinfo2 = True;
+
+ if (!srv->no_pathinfo3) {
+ bool not_supported_error = false;
+ status = cli_qpathinfo3(targetcli,
+ targetpath,
+ &create_time_ts,
+ &access_time_ts,
+ &write_time_ts,
+ &change_time_ts,
+ &size,
+ &attr,
+ &ino);
+ if (NT_STATUS_IS_OK(status)) {
+ goto setup_stat;
+ }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
+ not_supported_error = true;
+ }
+ if (!not_supported_error) {
+ /* "Normal error". Just return it to caller. */
+ TALLOC_FREE(frame);
+ return status;
+ }
+ }
+
+ srv->no_pathinfo3 = True;
+
+ /* if this is NT then don't bother with the getatr */
+ if (smb1cli_conn_capabilities(targetcli->conn) & CAP_NT_SMBS) {
+ goto all_failed;
+ }
+
+ status = cli_getatr(targetcli, targetpath, &attr, &size, &write_time);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto all_failed;
+ }
+ w_time_ts = convert_time_t_to_timespec(write_time);
+ access_time_ts = change_time_ts = write_time_ts = w_time_ts;
+
+setup_stat:
+ setup_stat(sb,
+ path,
+ size,
+ attr,
+ ino,
+ srv->dev,
+ access_time_ts,
+ change_time_ts,
+ write_time_ts);
+
+ TALLOC_FREE(frame);
+ return NT_STATUS_OK;
+
+all_failed:
+ srv->no_pathinfo2 = False;
+ srv->no_pathinfo3 = False;
+
+ TALLOC_FREE(frame);
+ return status;
+}
+
+/*
+ * 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.
+ *
+ * "attr" (attributes) parameter may be set to -1 if it is not to be set.
+ */
+bool
+SMBC_setatr(SMBCCTX * context, SMBCSRV *srv, char *path,
+ struct timespec create_time,
+ struct timespec access_time,
+ struct timespec write_time,
+ struct timespec change_time,
+ uint16_t attr)
+{
+ uint16_t fd;
+ uint32_t lattr = (uint32_t)attr;
+ NTSTATUS status;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (attr == (uint16_t)-1) {
+ /*
+ * External ABI only passes in
+ * 16-bits of attribute. Make
+ * sure we correctly map to
+ * (uint32_t)-1 meaning don't
+ * change attributes if attr was
+ * passed in as 16-bit -1.
+ */
+ lattr = (uint32_t)-1;
+ }
+
+
+ /*
+ * 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 ||
+ !NT_STATUS_IS_OK(cli_setpathinfo_ext(srv->cli, path,
+ create_time,
+ access_time,
+ write_time,
+ change_time,
+ lattr))) {
+
+ /*
+ * 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 */
+ status = cli_open(srv->cli, path, O_RDWR, DENY_NONE, &fd);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ return False;
+ }
+
+ /* Set the new attributes */
+ status = cli_setattrE(
+ srv->cli,
+ fd,
+ change_time.tv_sec,
+ access_time.tv_sec,
+ write_time.tv_sec);
+
+ /* Close the file */
+ cli_close(srv->cli, fd);
+
+ /*
+ * Unfortunately, setattrE() doesn't have a provision for
+ * setting the access attr (attributes). We'll have to try
+ * cli_setatr() for that, and with only this parameter, it
+ * seems to work on win98.
+ */
+ if (NT_STATUS_IS_OK(status) && attr != (uint16_t) -1) {
+ status = cli_setatr(srv->cli, path, (uint32_t)attr, 0);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ errno = cli_status_to_errno(status);
+ 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)
+{
+ off_t size;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!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:
+ if (!NT_STATUS_IS_OK(cli_qfileinfo_basic(
+ file->targetcli, file->cli_fd, NULL,
+ &size, NULL, NULL, NULL, NULL,
+ NULL))) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ 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)
+{
+ off_t size = length;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!context || !context->internal->initialized) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!SMBC_dlist_contains(context->internal->files, file)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!file->file) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!NT_STATUS_IS_OK(cli_ftruncate(file->targetcli, file->cli_fd, (uint64_t)size))) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+}
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