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-rw-r--r--source3/libsmb/libsmb_file.c859
1 files changed, 859 insertions, 0 deletions
diff --git a/source3/libsmb/libsmb_file.c b/source3/libsmb/libsmb_file.c
new file mode 100644
index 0000000000..619176697b
--- /dev/null
+++ b/source3/libsmb/libsmb_file.c
@@ -0,0 +1,859 @@
+/*
+ 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 "libsmbclient.h"
+#include "libsmb_internal.h"
+
+
+/*
+ * Routine to open() a file ...
+ */
+
+SMBCFILE *
+SMBC_open_ctx(SMBCCTX *context,
+ const char *fname,
+ int flags,
+ mode_t mode)
+{
+ char *server = NULL, *share = NULL, *user = NULL, *password = NULL, *workgroup = NULL;
+ char *path = NULL;
+ char *targetpath = NULL;
+ struct cli_state *targetcli = NULL;
+ SMBCSRV *srv = NULL;
+ SMBCFILE *file = NULL;
+ int fd;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!context || !context->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,
+ &share,
+ &path,
+ &user,
+ &password,
+ NULL)) {
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ if (!user || user[0] == (char)0) {
+ user = talloc_strdup(frame, context->user);
+ if (!user) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ }
+
+ srv = SMBC_server(frame, context, True,
+ server, 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] == '\\') {
+ fd = -1;
+ } else {
+ file = SMB_MALLOC_P(SMBCFILE);
+
+ if (!file) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ ZERO_STRUCTP(file);
+
+ /*d_printf(">>>open: resolving %s\n", path);*/
+ if (!cli_resolve_path(frame, "", srv->cli, path, &targetcli, &targetpath)) {
+ d_printf("Could not resolve %s\n", path);
+ SAFE_FREE(file);
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ /*d_printf(">>>open: resolved %s as %s\n", path, targetpath);*/
+
+ if ((fd = cli_open(targetcli, targetpath, flags,
+ context->share_mode)) < 0) {
+
+ /* Handle the error ... */
+
+ SAFE_FREE(file);
+ errno = SMBC_errno(context, targetcli);
+ TALLOC_FREE(frame);
+ return NULL;
+
+ }
+
+ /* Fill in file struct */
+
+ file->cli_fd = fd;
+ file->fname = SMB_STRDUP(fname);
+ file->srv = srv;
+ file->offset = 0;
+ file->file = True;
+
+ DLIST_ADD(context->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 (fd == -1) {
+ int eno = 0;
+
+ eno = SMBC_errno(context, srv->cli);
+ file = (context->posix_emu.opendir_fn)(context, fname);
+ if (!file) errno = eno;
+ TALLOC_FREE(frame);
+ return file;
+
+ }
+
+ errno = EINVAL; /* FIXME, correct errno ? */
+ TALLOC_FREE(frame);
+ return NULL;
+
+}
+
+/*
+ * Routine to create a file
+ */
+
+static int creat_bits = O_WRONLY | O_CREAT | O_TRUNC; /* FIXME: Do we need this */
+
+SMBCFILE *
+SMBC_creat_ctx(SMBCCTX *context,
+ const char *path,
+ mode_t mode)
+{
+
+ if (!context || !context->initialized) {
+
+ errno = EINVAL;
+ return NULL;
+
+ }
+
+ return SMBC_open_ctx(context, path, creat_bits, mode);
+}
+
+/*
+ * Routine to read() a file ...
+ */
+
+ssize_t
+SMBC_read_ctx(SMBCCTX *context,
+ SMBCFILE *file,
+ void *buf,
+ size_t count)
+{
+ int ret;
+ 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();
+
+ /*
+ * 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->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+
+ }
+
+ DEBUG(4, ("smbc_read(%p, %d)\n", file, (int)count));
+
+ if (!file || !SMBC_dlist_contains(context->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;
+
+ }
+
+ /*d_printf(">>>read: 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(">>>read: 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);*/
+
+ ret = cli_read(targetcli, file->cli_fd, (char *)buf, offset, count);
+
+ if (ret < 0) {
+
+ errno = SMBC_errno(context, targetcli);
+ TALLOC_FREE(frame);
+ return -1;
+
+ }
+
+ file->offset += ret;
+
+ DEBUG(4, (" --> %d\n", ret));
+
+ TALLOC_FREE(frame);
+ return ret; /* Success, ret bytes of data ... */
+
+}
+
+/*
+ * Routine to write() a file ...
+ */
+
+ssize_t
+SMBC_write_ctx(SMBCCTX *context,
+ SMBCFILE *file,
+ void *buf,
+ size_t count)
+{
+ int ret;
+ off_t offset;
+ 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();
+
+ /* First check all pointers before dereferencing them */
+
+ if (!context || !context->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+
+ }
+
+ if (!file || !SMBC_dlist_contains(context->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() */
+
+ /*d_printf(">>>write: 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(">>>write: 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(">>>write: resolved path as %s\n", targetpath);*/
+
+ ret = cli_write(targetcli, file->cli_fd, 0, (char *)buf, offset, count);
+
+ if (ret <= 0) {
+ errno = SMBC_errno(context, targetcli);
+ TALLOC_FREE(frame);
+ return -1;
+
+ }
+
+ file->offset += ret;
+
+ TALLOC_FREE(frame);
+ return ret; /* Success, 0 bytes of data ... */
+}
+
+/*
+ * Routine to close() a file ...
+ */
+
+int
+SMBC_close_ctx(SMBCCTX *context,
+ SMBCFILE *file)
+{
+ SMBCSRV *srv;
+ 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->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!file || !SMBC_dlist_contains(context->files, file)) {
+ errno = EBADF;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ /* IS a dir ... */
+ if (!file->file) {
+ TALLOC_FREE(frame);
+ return (context->posix_emu.closedir_fn)(context, file);
+ }
+
+ /*d_printf(">>>close: 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(">>>close: 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(">>>close: resolved path as %s\n", targetpath);*/
+
+ if (!cli_close(targetcli, file->cli_fd)) {
+
+ DEBUG(3, ("cli_close failed on %s. purging server.\n",
+ file->fname));
+ /* Deallocate slot and remove the server
+ * from the server cache if unused */
+ errno = SMBC_errno(context, targetcli);
+ srv = file->srv;
+ DLIST_REMOVE(context->files, file);
+ SAFE_FREE(file->fname);
+ SAFE_FREE(file);
+ (context->server.remove_unused_server_fn)(context, srv);
+ TALLOC_FREE(frame);
+ return -1;
+
+ }
+
+ DLIST_REMOVE(context->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
+ */
+bool
+SMBC_getatr(SMBCCTX * context,
+ SMBCSRV *srv,
+ char *path,
+ uint16 *mode,
+ SMB_OFF_T *size,
+ struct timespec *create_time_ts,
+ struct timespec *access_time_ts,
+ struct timespec *write_time_ts,
+ struct timespec *change_time_ts,
+ SMB_INO_T *ino)
+{
+ char *fixedpath = NULL;
+ char *targetpath = NULL;
+ struct cli_state *targetcli = NULL;
+ time_t write_time;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!context || !context->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ /* path fixup for . and .. */
+ if (strequal(path, ".") || strequal(path, "..")) {
+ fixedpath = talloc_strdup(frame, "\\");
+ if (!fixedpath) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ } else {
+ fixedpath = talloc_strdup(frame, path);
+ if (!fixedpath) {
+ errno = ENOMEM;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ trim_string(fixedpath, NULL, "\\..");
+ trim_string(fixedpath, NULL, "\\.");
+ }
+ DEBUG(4,("SMBC_getatr: sending qpathinfo\n"));
+
+ if (!cli_resolve_path(frame, "", srv->cli, fixedpath,
+ &targetcli, &targetpath)) {
+ d_printf("Couldn't resolve %s\n", path);
+ TALLOC_FREE(frame);
+ return False;
+ }
+
+ if (!srv->no_pathinfo2 &&
+ cli_qpathinfo2(targetcli, targetpath,
+ create_time_ts,
+ access_time_ts,
+ write_time_ts,
+ change_time_ts,
+ size, mode, ino)) {
+ TALLOC_FREE(frame);
+ return True;
+ }
+
+ /* if this is NT then don't bother with the getatr */
+ if (targetcli->capabilities & CAP_NT_SMBS) {
+ errno = EPERM;
+ TALLOC_FREE(frame);
+ return False;
+ }
+
+ if (cli_getatr(targetcli, targetpath, mode, size, &write_time)) {
+
+ struct timespec w_time_ts;
+
+ w_time_ts = convert_time_t_to_timespec(write_time);
+
+ 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->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!file || !SMBC_dlist_contains(context->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->initialized) {
+
+ errno = EINVAL;
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if (!file || !SMBC_dlist_contains(context->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;
+
+}
generated by cgit (git 2.34.1) at 2024-07-04 17:42:50 +0000