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clitar.c
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/*
Unix SMB/CIFS implementation.
Tar backup command extension
Copyright (C) Aurélien Aptel 2013
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/>.
*/
/**
* # General overview of the tar extension
*
* All tar_xxx() functions work on a `struct tar` which store most of
* the context of the backup process.
*
* The current tar context can be accessed via the global variable
* `tar_ctx`. It's publicly exported as an opaque handle via
* tar_get_ctx().
*
* A tar context is first configured through tar_parse_args() which
* can be called from either the CLI (in client.c) or the interactive
* session (via the cmd_tar() callback).
*
* Once the configuration is done (successfully), the context is ready
* for processing and tar_to_process() returns true.
*
* The next step is to call tar_process() which dispatch the
* processing to either tar_create() or tar_extract(), depending on
* the context.
*
* ## Archive creation
*
* tar_create() creates an archive using the libarchive API then
*
* - iterates on the requested paths if the context is in inclusion
* mode with tar_create_from_list()
*
* - or iterates on the whole share (starting from the current dir) if
* in exclusion mode or if no specific path were requested
*
* The do_list() function from client.c is used to list recursively
* the share. In particular it takes a DOS path mask (eg. \mydir\*)
* and a callback function which will be called with each file name
* and attributes. The tar callback function is get_file_callback().
*
* The callback function checks whether the file should be skipped
* according the the configuration via tar_create_skip_path(). If it's
* not skipped it's downloaded and written to the archive in
* tar_get_file().
*
* ## Archive extraction
*
* tar_extract() opens the archive and iterates on each file in
* it. For each file tar_extract_skip_path() checks whether it should
* be skipped according to the config. If it's not skipped it's
* uploaded on the server in tar_send_file().
*/
#include "includes.h"
#include "system/filesys.h"
#include "client/client_proto.h"
#include "client/clitar_proto.h"
#include "libsmb/libsmb.h"
#ifdef HAVE_LIBARCHIVE
#include <archive.h>
#include <archive_entry.h>
/* prepend module name and line number to debug messages */
#define DBG(a, b) (DEBUG(a, ("tar:%-4d ", __LINE__)), DEBUG(a, b))
/* preprocessor magic to stringify __LINE__ (int) */
#define STR1(x) #x
#define STR2(x) STR1(x)
/**
* Number of byte in a block unit.
*/
#define TAR_BLOCK_UNIT 512
/**
* Default tar block size in TAR_BLOCK_UNIT.
*/
#define TAR_DEFAULT_BLOCK_SIZE 20
/**
* Maximum value for the blocksize field
*/
#define TAR_MAX_BLOCK_SIZE 0xffff
/**
* Size of the buffer used when downloading a file
*/
#define TAR_CLI_READ_SIZE 0xff00
#define TAR_DO_LIST_ATTR (FILE_ATTRIBUTE_DIRECTORY \
| FILE_ATTRIBUTE_SYSTEM \
| FILE_ATTRIBUTE_HIDDEN)
enum tar_operation {
TAR_NO_OPERATION,
TAR_CREATE, /* c flag */
TAR_EXTRACT, /* x flag */
};
enum tar_selection {
TAR_NO_SELECTION,
TAR_INCLUDE, /* I and F flag, default */
TAR_EXCLUDE, /* X flag */
};
struct tar {
TALLOC_CTX *talloc_ctx;
/* in state that needs/can be processed? */
bool to_process;
/* flags */
struct tar_mode {
enum tar_operation operation; /* create, extract */
enum tar_selection selection; /* include, exclude */
int blocksize; /* size in TAR_BLOCK_UNIT of a tar file block */
bool hidden; /* backup hidden file? */
bool system; /* backup system file? */
bool incremental; /* backup _only_ archived file? */
bool reset; /* unset archive bit? */
bool dry; /* don't write tar file? */
bool regex; /* XXX: never actually using regex... */
bool verbose; /* XXX: ignored */
} mode;
/* nb of bytes received */
uint64_t total_size;
/* path to tar archive name */
char *tar_path;
/* list of path to include or exclude */
char **path_list;
int path_list_size;
/* archive handle */
struct archive *archive;
};
/**
* Global context imported in client.c when needed.
*
* Default options.
*/
struct tar tar_ctx = {
.mode.selection = TAR_INCLUDE,
.mode.blocksize = TAR_DEFAULT_BLOCK_SIZE,
.mode.hidden = true,
.mode.system = true,
.mode.incremental = false,
.mode.reset = false,
.mode.dry = false,
.mode.regex = false,
.mode.verbose = false,
};
/* tar, local function */
static int tar_create(struct tar* t);
static int tar_create_from_list(struct tar *t);
static int tar_extract(struct tar *t);
static int tar_read_inclusion_file(struct tar *t, const char* filename);
static int tar_send_file(struct tar *t, struct archive_entry *entry);
static int tar_set_blocksize(struct tar *t, int size);
static int tar_set_newer_than(struct tar *t, const char *filename);
static NTSTATUS tar_add_selection_path(struct tar *t, const char *path);
static void tar_dump(struct tar *t);
static NTSTATUS tar_extract_skip_path(struct tar *t,
struct archive_entry *entry,
bool *_skip);
static TALLOC_CTX *tar_reset_mem_context(struct tar *t);
static void tar_free_mem_context(struct tar *t);
static NTSTATUS tar_create_skip_path(struct tar *t,
const char *fullpath,
const struct file_info *finfo,
bool *_skip);
static NTSTATUS tar_path_in_list(struct tar *t, const char *path,
bool reverse, bool *_is_in_list);
static int tar_get_file(struct tar *t,
const char *full_dos_path,
struct file_info *finfo);
static NTSTATUS get_file_callback(struct cli_state *cli,
struct file_info *finfo,
const char *dir);
/* utilities */
static char *fix_unix_path(char *path, bool removeprefix);
static NTSTATUS path_base_name(TALLOC_CTX *ctx, const char *path, char **_base);
static const char* skip_useless_char_in_path(const char *p);
static int make_remote_path(const char *full_path);
static int max_token (const char *str);
static NTSTATUS is_subpath(const char *sub, const char *full,
bool *_subpath_match);
/**
* tar_get_ctx - retrieve global tar context handle
*/
struct tar *tar_get_ctx()
{
return &tar_ctx;
}
/**
* cmd_block - interactive command to change tar blocksize
*
* Read a size from the client command line and update the current
* blocksize.
*/
int cmd_block(void)
{
/* XXX: from client.c */
const extern char *cmd_ptr;
char *buf;
int err = 0;
bool ok;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
ok = next_token_talloc(ctx, &cmd_ptr, &buf, NULL);
if (!ok) {
DBG(0, ("blocksize <n>\n"));
err = 1;
goto out;
}
ok = tar_set_blocksize(&tar_ctx, atoi(buf));
if (ok) {
DBG(0, ("invalid blocksize\n"));
err = 1;
goto out;
}
DBG(2, ("blocksize is now %d\n", tar_ctx.mode.blocksize));
out:
talloc_free(ctx);
return err;
}
/**
* cmd_tarmode - interactive command to change tar behaviour
*
* Read one or more modes from the client command line and update the
* current tar mode.
*/
int cmd_tarmode(void)
{
const extern char *cmd_ptr;
char *buf;
int i;
TALLOC_CTX *ctx;
struct {
const char *cmd;
bool *p;
bool value;
} table[] = {
{"full", &tar_ctx.mode.incremental, false},
{"inc", &tar_ctx.mode.incremental, true },
{"reset", &tar_ctx.mode.reset, true },
{"noreset", &tar_ctx.mode.reset, false},
{"system", &tar_ctx.mode.system, true },
{"nosystem", &tar_ctx.mode.system, false},
{"hidden", &tar_ctx.mode.hidden, true },
{"nohidden", &tar_ctx.mode.hidden, false},
{"verbose", &tar_ctx.mode.verbose, true },
{"noquiet", &tar_ctx.mode.verbose, true },
{"quiet", &tar_ctx.mode.verbose, false},
{"noverbose", &tar_ctx.mode.verbose, false},
};
ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
while (next_token_talloc(ctx, &cmd_ptr, &buf, NULL)) {
for (i = 0; i < ARRAY_SIZE(table); i++) {
if (strequal(table[i].cmd, buf)) {
*table[i].p = table[i].value;
break;
}
}
if (i == ARRAY_SIZE(table))
DBG(0, ("tarmode: unrecognised option %s\n", buf));
}
DBG(0, ("tarmode is now %s, %s, %s, %s, %s\n",
tar_ctx.mode.incremental ? "incremental" : "full",
tar_ctx.mode.system ? "system" : "nosystem",
tar_ctx.mode.hidden ? "hidden" : "nohidden",
tar_ctx.mode.reset ? "reset" : "noreset",
tar_ctx.mode.verbose ? "verbose" : "quiet"));
talloc_free(ctx);
return 0;
}
/**
* cmd_tar - interactive command to start a tar backup/restoration
*
* Check presence of argument, parse them and handle the request.
*/
int cmd_tar(void)
{
const extern char *cmd_ptr;
const char *flag;
const char **val;
char *buf;
int maxtok = max_token(cmd_ptr);
int i = 0;
int err = 0;
bool ok;
int rc;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
ok = next_token_talloc(ctx, &cmd_ptr, &buf, NULL);
if (!ok) {
DBG(0, ("tar <c|x>[IXFbganN] [options] <tar file> [path list]\n"));
err = 1;
goto out;
}
flag = buf;
val = talloc_array(ctx, const char *, maxtok);
if (val == NULL) {
err = 1;
goto out;
}
while (next_token_talloc(ctx, &cmd_ptr, &buf, NULL)) {
val[i++] = buf;
}
rc = tar_parse_args(&tar_ctx, flag, val, i);
if (rc != 0) {
DBG(0, ("parse_args failed\n"));
err = 1;
goto out;
}
rc = tar_process(&tar_ctx);
if (rc != 0) {
DBG(0, ("tar_process failed\n"));
err = 1;
goto out;
}
out:
talloc_free(ctx);
return err;
}
/**
* tar_parse_args - parse and set tar command line arguments
* @flag: string pointing to tar options
* @val: number of tar arguments
* @valsize: table of arguments after the flags (number of element in val)
*
* tar arguments work in a weird way. For each flag f that takes a
* value v, the user is supposed to type:
*
* on the CLI:
* -Tf1f2f3 v1 v2 v3 TARFILE PATHS...
*
* in the interactive session:
* tar f1f2f3 v1 v2 v3 TARFILE PATHS...
*
* @flag has only flags (eg. "f1f2f3") and @val has the arguments
* (values) following them (eg. ["v1", "v2", "v3", "TARFILE", "PATH1",
* "PATH2"]).
*
* There are only 2 flags that take an arg: b and N. The other flags
* just change the semantic of PATH or TARFILE.
*
* PATH can be a list of included/excluded paths, the path to a file
* containing a list of included/excluded paths to use (F flag). If no
* PATH is provided, the whole share is used (/).
*/
int tar_parse_args(struct tar* t,
const char *flag,
const char **val,
int valsize)
{
TALLOC_CTX *ctx;
bool do_read_list = false;
/* index of next value to use */
int ival = 0;
int rc;
if (t == NULL) {
DBG(0, ("Invalid tar context\n"));
return 1;
}
ctx = tar_reset_mem_context(t);
if (ctx == NULL) {
return 1;
}
/*
* Reset back some options - could be from interactive version
* all other modes are left as they are
*/
t->mode.operation = TAR_NO_OPERATION;
t->mode.selection = TAR_NO_SELECTION;
t->mode.dry = false;
t->to_process = false;
t->total_size = 0;
while (flag[0] != '\0') {
switch(flag[0]) {
/* operation */
case 'c':
if (t->mode.operation != TAR_NO_OPERATION) {
printf("Tar must be followed by only one of c or x.\n");
return 1;
}
t->mode.operation = TAR_CREATE;
break;
case 'x':
if (t->mode.operation != TAR_NO_OPERATION) {
printf("Tar must be followed by only one of c or x.\n");
return 1;
}
t->mode.operation = TAR_EXTRACT;
break;
/* selection */
case 'I':
if (t->mode.selection != TAR_NO_SELECTION) {
DBG(0,("Only one of I,X,F must be specified\n"));
return 1;
}
t->mode.selection = TAR_INCLUDE;
break;
case 'X':
if (t->mode.selection != TAR_NO_SELECTION) {
DBG(0,("Only one of I,X,F must be specified\n"));
return 1;
}
t->mode.selection = TAR_EXCLUDE;
break;
case 'F':
if (t->mode.selection != TAR_NO_SELECTION) {
DBG(0,("Only one of I,X,F must be specified\n"));
return 1;
}
t->mode.selection = TAR_INCLUDE;
do_read_list = true;
break;
/* blocksize */
case 'b':
if (ival >= valsize) {
DBG(0, ("Option b must be followed by a blocksize\n"));
return 1;
}
if (tar_set_blocksize(t, atoi(val[ival]))) {
DBG(0, ("Option b must be followed by a valid blocksize\n"));
return 1;
}
ival++;
break;
/* incremental mode */
case 'g':
t->mode.incremental = true;
break;
/* newer than */
case 'N':
if (ival >= valsize) {
DBG(0, ("Option N must be followed by valid file name\n"));
return 1;
}
if (tar_set_newer_than(t, val[ival])) {
DBG(0,("Error setting newer-than time\n"));
return 1;
}
ival++;
break;
/* reset mode */
case 'a':
t->mode.reset = true;
break;
/* verbose */
case 'q':
t->mode.verbose = true;
break;
/* regex match */
case 'r':
t->mode.regex = true;
break;
/* dry run mode */
case 'n':
if (t->mode.operation != TAR_CREATE) {
DBG(0, ("n is only meaningful when creating a tar-file\n"));
return 1;
}
t->mode.dry = true;
DBG(0, ("dry_run set\n"));
break;
default:
DBG(0,("Unknown tar option\n"));
return 1;
}
flag++;
}
/* no selection given? default selection is include */
if (t->mode.selection == TAR_NO_SELECTION) {
t->mode.selection = TAR_INCLUDE;
}
if (valsize - ival < 1) {
DBG(0, ("No tar file given.\n"));
return 1;
}
/* handle TARFILE */
t->tar_path = talloc_strdup(ctx, val[ival]);
if (t->tar_path == NULL) {
return 1;
}
ival++;
/*
* Make sure that dbf points to stderr if we are using stdout for
* tar output
*/
if (t->mode.operation == TAR_CREATE && strequal(t->tar_path, "-")) {
setup_logging("smbclient", DEBUG_STDERR);
}
/* handle PATHs... */
/* flag F -> read file list */
if (do_read_list) {
if (valsize - ival != 1) {
DBG(0,("Option F must be followed by exactly one filename.\n"));
return 1;
}
rc = tar_read_inclusion_file(t, val[ival]);
if (rc != 0) {
return 1;
}
ival++;
/* otherwise store all the PATHs on the command line */
} else {
int i;
for (i = ival; i < valsize; i++) {
NTSTATUS status;
status = tar_add_selection_path(t, val[i]);
if (!NT_STATUS_IS_OK(status)) {
return 1;
}
}
}
t->to_process = true;
tar_dump(t);
return 0;
}
/**
* tar_process - start processing archive
*
* The talloc context of the fields is freed at the end of the call.
*/
int tar_process(struct tar *t)
{
int rc = 0;
if (t == NULL) {
DBG(0, ("Invalid tar context\n"));
return 1;
}
switch(t->mode.operation) {
case TAR_EXTRACT:
rc = tar_extract(t);
break;
case TAR_CREATE:
rc = tar_create(t);
break;
default:
DBG(0, ("Invalid tar state\n"));
rc = 1;
}
t->to_process = false;
tar_free_mem_context(t);
DBG(5, ("tar_process done, err = %d\n", rc));
return rc;
}
/**
* tar_create - create archive and fetch files
*/
static int tar_create(struct tar* t)
{
int r;
int err = 0;
NTSTATUS status;
const char *mask;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
t->archive = archive_write_new();
if (!t->mode.dry) {
const int bsize = t->mode.blocksize * TAR_BLOCK_UNIT;
r = archive_write_set_bytes_per_block(t->archive, bsize);
if (r != ARCHIVE_OK) {
DBG(0, ("Can't use a block size of %d bytes", bsize));
err = 1;
goto out;
}
/*
* Use PAX restricted format which is not the most
* conservative choice but has useful extensions and is widely
* supported
*/
r = archive_write_set_format_pax_restricted(t->archive);
if (r != ARCHIVE_OK) {
DBG(0, ("Can't use pax restricted format: %s\n",
archive_error_string(t->archive)));
err = 1;
goto out;
}
if (strequal(t->tar_path, "-")) {
r = archive_write_open_fd(t->archive, STDOUT_FILENO);
} else {
r = archive_write_open_filename(t->archive, t->tar_path);
}
if (r != ARCHIVE_OK) {
DBG(0, ("Can't open %s: %s\n", t->tar_path,
archive_error_string(t->archive)));
err = 1;
goto out_close;
}
}
/*
* In inclusion mode, iterate on the inclusion list
*/
if (t->mode.selection == TAR_INCLUDE && t->path_list_size > 0) {
if (tar_create_from_list(t)) {
err = 1;
goto out_close;
}
} else {
mask = talloc_asprintf(ctx, "%s\\*", client_get_cur_dir());
if (mask == NULL) {
err = 1;
goto out_close;
}
DBG(5, ("tar_process do_list with mask: %s\n", mask));
status = do_list(mask, TAR_DO_LIST_ATTR, get_file_callback, false, true);
if (!NT_STATUS_IS_OK(status)) {
DBG(0, ("do_list fail %s\n", nt_errstr(status)));
err = 1;
goto out_close;
}
}
out_close:
DBG(0, ("Total bytes received: %" PRIu64 "\n", t->total_size));
if (!t->mode.dry) {
r = archive_write_close(t->archive);
if (r != ARCHIVE_OK) {
DBG(0, ("Fatal: %s\n", archive_error_string(t->archive)));
err = 1;
goto out;
}
}
out:
#ifdef HAVE_ARCHIVE_READ_FREE
archive_write_free(t->archive);
#else
archive_write_finish(t->archive);
#endif
talloc_free(ctx);
return err;
}
/**
* tar_create_from_list - fetch from path list in include mode
*/
static int tar_create_from_list(struct tar *t)
{
int err = 0;
NTSTATUS status;
char *base;
const char *path, *mask, *start_dir;
int i;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
start_dir = talloc_strdup(ctx, client_get_cur_dir());
if (start_dir == NULL) {
err = 1;
goto out;
}
for (i = 0; i < t->path_list_size; i++) {
path = t->path_list[i];
base = NULL;
status = path_base_name(ctx, path, &base);
if (!NT_STATUS_IS_OK(status)) {
err = 1;
goto out;
}
mask = talloc_asprintf(ctx, "%s\\%s",
client_get_cur_dir(), path);
if (mask == NULL) {
err = 1;
goto out;
}
DBG(5, ("incl. path='%s', base='%s', mask='%s'\n",
path, base ? base : "NULL", mask));
if (base != NULL) {
base = talloc_asprintf(ctx, "%s%s\\",
client_get_cur_dir(), base);
if (base == NULL) {
err = 1;
goto out;
}
DBG(5, ("cd '%s' before do_list\n", base));
client_set_cur_dir(base);
}
status = do_list(mask, TAR_DO_LIST_ATTR, get_file_callback, false, true);
if (base != NULL) {
client_set_cur_dir(start_dir);
}
if (!NT_STATUS_IS_OK(status)) {
DBG(0, ("do_list failed on %s (%s)\n", path, nt_errstr(status)));
err = 1;
goto out;
}
}
out:
talloc_free(ctx);
return err;
}
/**
* get_file_callback - do_list callback
*
* Callback for client.c do_list(). Called for each file found on the
* share matching do_list mask. Recursively call do_list() with itself
* as callback when the current file is a directory.
*/
static NTSTATUS get_file_callback(struct cli_state *cli,
struct file_info *finfo,
const char *dir)
{
NTSTATUS status = NT_STATUS_OK;
char *remote_name;
const char *initial_dir = client_get_cur_dir();
bool skip = false;
int rc;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
remote_name = talloc_asprintf(ctx, "%s%s", initial_dir, finfo->name);
if (remote_name == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
if (strequal(finfo->name, "..") || strequal(finfo->name, ".")) {
goto out;
}
status = tar_create_skip_path(&tar_ctx, remote_name, finfo, &skip);
if (!NT_STATUS_IS_OK(status)) {
goto out;
}
if (skip) {
DBG(5, ("--- %s\n", remote_name));
status = NT_STATUS_OK;
goto out;
}
if (finfo->mode & FILE_ATTRIBUTE_DIRECTORY) {
char *old_dir;
char *new_dir;
char *mask;
old_dir = talloc_strdup(ctx, initial_dir);
new_dir = talloc_asprintf(ctx, "%s%s\\",
initial_dir, finfo->name);
if ((old_dir == NULL) || (new_dir == NULL)) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
mask = talloc_asprintf(ctx, "%s*", new_dir);
if (mask == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
rc = tar_get_file(&tar_ctx, remote_name, finfo);
if (rc != 0) {
status = NT_STATUS_UNSUCCESSFUL;
goto out;
}
client_set_cur_dir(new_dir);
do_list(mask, TAR_DO_LIST_ATTR, get_file_callback, false, true);
client_set_cur_dir(old_dir);
} else {
rc = tar_get_file(&tar_ctx, remote_name, finfo);
if (rc != 0) {
status = NT_STATUS_UNSUCCESSFUL;
goto out;
}
}
out:
talloc_free(ctx);
return status;
}
/**
* tar_get_file - fetch a remote file to the local archive
* @full_dos_path: path to the file to fetch
* @finfo: attributes of the file to fetch
*/
static int tar_get_file(struct tar *t,
const char *full_dos_path,
struct file_info *finfo)
{
extern struct cli_state *cli;
NTSTATUS status;
struct archive_entry *entry;
char *full_unix_path;
char buf[TAR_CLI_READ_SIZE];
size_t len;
uint64_t off = 0;
uint16_t remote_fd = (uint16_t)-1;
int err = 0, r;
const bool isdir = finfo->mode & FILE_ATTRIBUTE_DIRECTORY;
TALLOC_CTX *ctx = talloc_new(NULL);
if (ctx == NULL) {
return 1;
}
DBG(5, ("+++ %s\n", full_dos_path));
t->total_size += finfo->size;
if (t->mode.dry) {
goto out;
}
if (t->mode.reset) {
/* ignore return value: server might not store DOS attributes */
set_remote_attr(full_dos_path, FILE_ATTRIBUTE_ARCHIVE, ATTR_UNSET);
}
full_unix_path = talloc_asprintf(ctx, ".%s", full_dos_path);
if (full_unix_path == NULL) {
err = 1;
goto out;
}
string_replace(full_unix_path, '\\', '/');
entry = archive_entry_new();
archive_entry_copy_pathname(entry, full_unix_path);
archive_entry_set_filetype(entry, isdir ? AE_IFDIR : AE_IFREG);
archive_entry_set_atime(entry,
finfo->atime_ts.tv_sec,
finfo->atime_ts.tv_nsec);
archive_entry_set_mtime(entry,
finfo->mtime_ts.tv_sec,
finfo->mtime_ts.tv_nsec);
archive_entry_set_ctime(entry,
finfo->ctime_ts.tv_sec,
finfo->ctime_ts.tv_nsec);
archive_entry_set_perm(entry, isdir ? 0755 : 0644);
/*
* check if we can safely cast unsigned file size to libarchive
* signed size. Very unlikely problem (>9 exabyte file)
*/
if (finfo->size > INT64_MAX) {
DBG(0, ("Remote file %s too big\n", full_dos_path));
goto out_entry;
}
archive_entry_set_size(entry, (int64_t)finfo->size);
r = archive_write_header(t->archive, entry);
if (r != ARCHIVE_OK) {
DBG(0, ("Fatal: %s\n", archive_error_string(t->archive)));
err = 1;
goto out_entry;
}
if (isdir) {
DBG(5, ("get_file skip dir %s\n", full_dos_path));
goto out_entry;
}
status = cli_open(cli, full_dos_path, O_RDONLY, DENY_NONE, &remote_fd);
if (!NT_STATUS_IS_OK(status)) {
DBG(0,("%s opening remote file %s\n",
nt_errstr(status), full_dos_path));
goto out_entry;
}
do {
status = cli_read(cli, remote_fd, buf, off, sizeof(buf), &len);
if (!NT_STATUS_IS_OK(status)) {
DBG(0,("Error reading file %s : %s\n",
full_dos_path, nt_errstr(status)));
err = 1;
goto out_close;
}
off += len;
r = archive_write_data(t->archive, buf, len);
if (r < 0) {
DBG(0, ("Fatal: %s\n", archive_error_string(t->archive)));
err = 1;
goto out_close;
}
} while (off < finfo->size);
out_close:
cli_close(cli, remote_fd);
out_entry:
archive_entry_free(entry);
out:
talloc_free(ctx);
return err;
}
/**
* tar_extract - open archive and send files.
*/
static int tar_extract(struct tar *t)
{