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Non-blocking work

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* The following low level packet routines now fully support non-blocking:
    libssh2_sftp_packet_read()
    libssh2_sftp_packet_ask()
    libssh2_sftp_packet_require()
    libssh2_sftp_packet_requirev()

* libssh2_sftp_readdirnb() functions completely in non-blocking mode

* The rest of the routines which call the libssh2_sftp_packet_* routine
  loop on a return code of PACKET_EAGAIN.  This maintains the current
  functionality until they fully support non-blocking

* The state of all function are labeled with either NB-SAFE or NB-UNSAFE,
  for those that are know.  NB-UNSAFE?? for those that haven't been
  examined.
This commit is contained in:
James Housley
2007-04-21 18:16:23 +00:00
parent f8fe38e3a5
commit 2dc313d365
2 changed files with 744 additions and 407 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/libssh2_sftp.h
View File

@@ -191,7 +191,11 @@ LIBSSH2_API ssize_t libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
LIBSSH2_API ssize_t libssh2_sftp_readnb(LIBSSH2_SFTP_HANDLE *handle,
char *buffer, size_t buffer_maxlen);
LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs);
LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs);
LIBSSH2_API int libssh2_sftp_readdirnb(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs);
LIBSSH2_API ssize_t libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
const char *buffer, size_t count);
LIBSSH2_API ssize_t libssh2_sftp_writenb(LIBSSH2_SFTP_HANDLE *handle,
@@ -238,6 +242,9 @@ LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, un
#define libssh2_sftp_readlink(sftp, path, target, maxlen) libssh2_sftp_symlink_ex((sftp), (path), strlen(path), (target), (maxlen), LIBSSH2_SFTP_READLINK)
#define libssh2_sftp_realpath(sftp, path, target, maxlen) libssh2_sftp_symlink_ex((sftp), (path), strlen(path), (target), (maxlen), LIBSSH2_SFTP_REALPATH)
LIBSSH2_API void libssh2_sftp_set_blocking(LIBSSH2_SFTP *session, int blocking);
LIBSSH2_API int libssh2_sftp_get_blocking(LIBSSH2_SFTP *session);
#ifdef __cplusplus
} /* extern "C" */
#endif

478
src/sftp.c
View File

@@ -74,6 +74,12 @@
#define SSH_FXP_EXTENDED 200
#define SSH_FXP_EXTENDED_REPLY 201
typedef enum {
sftp_readdir_idle = 0,
sftp_readdir_packet_created,
sftp_readdir_packet_sent
} libssh2_sftp_readdir_state;
struct _LIBSSH2_SFTP {
LIBSSH2_CHANNEL *channel;
@@ -84,6 +90,19 @@ struct _LIBSSH2_SFTP {
LIBSSH2_SFTP_HANDLE *handles;
unsigned long last_errno;
/* Holder for partial packet, use in libssh2_sftp_packet_read() */
unsigned char *partial_packet; /* The data */
unsigned long partial_len; /* Desired number of bytes */
unsigned long partial_received; /* Bytes received so far */
/* Time that libssh2_sftp_packet_requirev() started reading */
time_t requirev_start;
/* State variables used in _libssh2_sftp_readdir() */
libssh2_sftp_readdir_state readdir_state;
unsigned char *readdir_packet;
unsigned long readdir_request_id;
};
#define LIBSSH2_SFTP_HANDLE_FILE 0
@@ -118,6 +137,7 @@ struct _LIBSSH2_SFTP_HANDLE {
/* {{{ libssh2_sftp_packet_add
* Add a packet to the SFTP packet brigade
*/
/* libssh2_sftp_packet_add - NB-SAFE */
static int libssh2_sftp_packet_add(LIBSSH2_SFTP *sftp, unsigned char *data, unsigned long data_len)
{
LIBSSH2_SESSION *session = sftp->channel->session;
@@ -151,17 +171,40 @@ static int libssh2_sftp_packet_add(LIBSSH2_SFTP *sftp, unsigned char *data, unsi
/* {{{ libssh2_sftp_packet_read
* Frame an SFTP packet off the channel
*/
static int libssh2_sftp_packet_read(LIBSSH2_SFTP *sftp, int should_block)
/* libssh2_sftp_packet_read - NB-SAFE */
static int libssh2_sftp_packet_read(LIBSSH2_SFTP *sftp, int should_block, int flush)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
LIBSSH2_SESSION *session = channel->session;
unsigned char buffer[4]; /* To store the packet length */
unsigned char *packet;
unsigned long packet_len, packet_received;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Waiting for packet: %s block", should_block ? "will" : "willnot");
libssh2_channel_set_blocking(channel, should_block);
if (4 != _libssh2_channel_read(channel, (char *)buffer, 4)) {
if (flush && sftp->partial_packet) {
/* When flushing, remove previous partial */
LIBSSH2_FREE(session, sftp->partial_packet);
}
/* If there was a previous partial, start using it */
if (sftp->partial_packet) {
packet = sftp->partial_packet;
packet_len = sftp->partial_len;
packet_received = sftp->partial_received;
sftp->partial_packet = NULL;
} else {
rc = _libssh2_channel_read(channel, (char *)buffer, 4);
if (flush && (rc < 0)) {
/* When flushing, exit quickly */
return -1;
}
else if (!should_block && (rc == PACKET_EAGAIN)) {
return PACKET_EAGAIN;
}
else if (4 != rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT,
"Timeout waiting for FXP packet", 0);
return -1;
@@ -182,13 +225,29 @@ static int libssh2_sftp_packet_read(LIBSSH2_SFTP *sftp, int should_block)
}
packet_received = 0;
while (packet_len > packet_received) {
long bytes_received =
_libssh2_channel_read(channel,
(char *)packet + packet_received,
packet_len - packet_received);
}
if (bytes_received < 0) {
/* Read as much of the packet as we can */
while (packet_len > packet_received) {
long bytes_received = _libssh2_channel_read(channel, (char *)packet + packet_received, packet_len - packet_received);
if (flush && (rc < 0)) {
/* When flushing, exit quickly */
return -1;
}
else if (!should_block && (bytes_received == PACKET_EAGAIN)) {
/*
* We received EAGAIN, save what we have and
* return to EAGAIN to the caller
*/
sftp->partial_packet = packet;
sftp->partial_len = packet_len;
sftp->partial_received = packet_received;
packet = NULL;
return PACKET_EAGAIN;
}
else if (bytes_received < 0) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Receive error waiting for SFTP packet", 0);
LIBSSH2_FREE(session, packet);
return -1;
@@ -208,7 +267,9 @@ static int libssh2_sftp_packet_read(LIBSSH2_SFTP *sftp, int should_block)
/* {{{ libssh2_sftp_packet_ask
* A la libssh2_packet_ask()
*/
static int libssh2_sftp_packet_ask(LIBSSH2_SFTP *sftp, unsigned char packet_type, unsigned long request_id, unsigned char **data, unsigned long *data_len, int poll_channel)
/* libssh2_sftp_packet_ask - NB-SAFE */
static int libssh2_sftp_packet_ask(LIBSSH2_SFTP *sftp, unsigned char packet_type, unsigned long request_id, unsigned char **data,
unsigned long *data_len, int poll_channel)
{
LIBSSH2_SESSION *session = sftp->channel->session;
LIBSSH2_PACKET *packet = sftp->packets.head;
@@ -217,7 +278,11 @@ static int libssh2_sftp_packet_ask(LIBSSH2_SFTP *sftp, unsigned char packet_type
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Asking for %d packet", (int)packet_type);
if (poll_channel) {
if (libssh2_sftp_packet_read(sftp, 0) < 0) {
int ret = libssh2_sftp_packet_read(sftp, 0, 0);
if (ret == PACKET_EAGAIN) {
return PACKET_EAGAIN;
}
else if (ret < 0) {
return -1;
}
}
@@ -231,8 +296,7 @@ static int libssh2_sftp_packet_ask(LIBSSH2_SFTP *sftp, unsigned char packet_type
}
while (packet) {
if (strncmp((char *)packet->data, (char *)match_buf,
match_len) == 0) {
if (strncmp((char *)packet->data, (char *)match_buf, match_len) == 0) {
*data = packet->data;
*data_len = packet->data_len;
@@ -261,19 +325,26 @@ static int libssh2_sftp_packet_ask(LIBSSH2_SFTP *sftp, unsigned char packet_type
/* {{{ libssh2_sftp_packet_require
* A la libssh2_packet_require
*/
static int libssh2_sftp_packet_require(LIBSSH2_SFTP *sftp, unsigned char packet_type, unsigned long request_id, unsigned char **data, unsigned long *data_len)
/* libssh2_sftp_packet_require - NB-SAFE */
static int libssh2_sftp_packet_require(LIBSSH2_SFTP *sftp, unsigned char packet_type, unsigned long request_id,
unsigned char **data, unsigned long *data_len)
{
LIBSSH2_SESSION *session = sftp->channel->session;
int bl;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Requiring %d packet", (int)packet_type);
if (libssh2_sftp_packet_ask(sftp, packet_type, request_id, data, data_len, 0) == 0) {
/* A packet was available in the packet brigade */
/* The right packet was available in the packet brigade */
return 0;
}
bl = libssh2_channel_get_blocking(sftp->channel);
while (session->socket_state == LIBSSH2_SOCKET_CONNECTED) {
int ret = libssh2_sftp_packet_read(sftp, 1);
if (ret <= 0) {
int ret = libssh2_sftp_packet_read(sftp, bl, 0);
if (!bl && (ret == PACKET_EAGAIN)) {
return PACKET_EAGAIN;
}
else if (ret <= 0) {
return -1;
}
@@ -291,46 +362,67 @@ static int libssh2_sftp_packet_require(LIBSSH2_SFTP *sftp, unsigned char packet_
/* {{{ libssh2_sftp_packet_requirev
* Requie one of N possible reponses
*/
static int libssh2_sftp_packet_requirev(LIBSSH2_SFTP *sftp,
int num_valid_responses,
const unsigned char *valid_responses,
unsigned long request_id,
unsigned char **data,
unsigned long *data_len)
/* libssh2_sftp_packet_requirev - NB-SAFE */
static int libssh2_sftp_packet_requirev(LIBSSH2_SFTP *sftp, int num_valid_responses,
const unsigned char *valid_responses, unsigned long request_id,
unsigned char **data, unsigned long *data_len)
{
int i;
time_t start = time(NULL);
int bl;
/*
* If no timeout is active, start a new one and flush
* any pending packets
*/
if (sftp->requirev_start == 0) {
_libssh2_debug(sftp->channel->session, LIBSSH2_DBG_SFTP, "_requirev(): Initialize timeout");
sftp->requirev_start = time(NULL);
/* Flush */
while (libssh2_sftp_packet_read(sftp, 0) > 0);
while (libssh2_sftp_packet_read(sftp, 0, 1) > 0);
}
bl = libssh2_channel_get_blocking(sftp->channel);
while (sftp->channel->session->socket_state == LIBSSH2_SOCKET_CONNECTED) {
int ret;
for(i = 0; i < num_valid_responses; i++) {
if (libssh2_sftp_packet_ask(sftp, valid_responses[i],
request_id, data,
data_len, 0) == 0) {
if (libssh2_sftp_packet_ask(sftp, valid_responses[i], request_id,
data, data_len, 0) == 0) {
/*
* Set to zero before all returns to say
* the timeout is not active
*/
sftp->requirev_start = 0;
return 0;
}
}
ret = libssh2_sftp_packet_read(sftp, 1);
if (ret < 0) {
ret = libssh2_sftp_packet_read(sftp, bl, 0);
if (!bl && (ret == PACKET_EAGAIN)) {
return PACKET_EAGAIN;
}
else if (ret < 0) {
sftp->requirev_start = 0;
return -1;
}
if (ret == 0) {
else if (ret == 0) {
/* prevent busy-looping */
long left = LIBSSH2_READ_TIMEOUT -
(time(NULL) - start);
if((left <= 0) ||
(libssh2_waitsocket(sftp->channel->session,
left)<=0)) {
if ((LIBSSH2_READ_TIMEOUT - (time(NULL) - sftp->requirev_start)) <= 0) {
return PACKET_TIMEOUT;
}
ret = libssh2_waitsocket(sftp->channel->session, 1);
if (!bl && (ret == PACKET_EAGAIN)) {
return PACKET_EAGAIN;
}
else if (ret <= 0) {
sftp->requirev_start = 0;
return PACKET_TIMEOUT;
}
}
}
sftp->requirev_start = 0;
return -1;
}
/* }}} */
@@ -338,6 +430,7 @@ static int libssh2_sftp_packet_requirev(LIBSSH2_SFTP *sftp,
/* {{{ libssh2_sftp_attrsize
* Size that attr will occupy when turned into a bin struct
*/
/* libssh2_sftp_attrsize - NB-SAFE */
static int libssh2_sftp_attrsize(const LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
int attrsize = 4; /* flags(4) */
@@ -358,6 +451,7 @@ static int libssh2_sftp_attrsize(const LIBSSH2_SFTP_ATTRIBUTES *attrs)
/* {{{ libssh2_sftp_attr2bin
* Populate attributes into an SFTP block
*/
/* libssh2_sftp_attr2bin - NB-SAFE */
static int libssh2_sftp_attr2bin(unsigned char *p, const LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
unsigned char *s = p;
@@ -396,6 +490,7 @@ static int libssh2_sftp_attr2bin(unsigned char *p, const LIBSSH2_SFTP_ATTRIBUTES
/* {{{ libssh2_sftp_bin2attr
*/
/* libssh2_sftp_bin2attr - NB-SAFE */
static int libssh2_sftp_bin2attr(LIBSSH2_SFTP_ATTRIBUTES *attrs, const unsigned char *p)
{
const unsigned char *s = p;
@@ -434,6 +529,7 @@ LIBSSH2_CHANNEL_CLOSE_FUNC(libssh2_sftp_dtor);
/* {{{ libssh2_sftp_dtor
* Shutdown an SFTP stream when the channel closes
*/
/* libssh2_sftp_dtor - NB-SAFE */
LIBSSH2_CHANNEL_CLOSE_FUNC(libssh2_sftp_dtor)
{
LIBSSH2_SFTP *sftp = (LIBSSH2_SFTP*)(*channel_abstract);
@@ -446,6 +542,16 @@ LIBSSH2_CHANNEL_CLOSE_FUNC(libssh2_sftp_dtor)
libssh2_sftp_close_handle(sftp->handles);
}
/* Free the partial packet storage for libssh2_sftp_packet_read */
if (sftp->partial_packet) {
LIBSSH2_FREE(session, sftp->partial_packet);
}
/* Free the packet storage for _libssh2_sftp_packet_readdir */
if (sftp->readdir_packet) {
LIBSSH2_FREE(session, sftp->readdir_packet);
}
LIBSSH2_FREE(session, sftp);
}
/* }}} */
@@ -453,12 +559,14 @@ LIBSSH2_CHANNEL_CLOSE_FUNC(libssh2_sftp_dtor)
/* {{{ libssh2_sftp_init
* Startup an SFTP session
*/
/* libssh2_sftp_init - NB-UNSAFE */
LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session)
{
LIBSSH2_SFTP *sftp;
LIBSSH2_CHANNEL *channel;
unsigned char *data, *s, buffer[9]; /* sftp_header(5){excludes request_id} + version_id(4) */
unsigned long data_len;
int bl;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Initializing SFTP subsystem");
channel = libssh2_channel_open_session(session);
@@ -473,6 +581,8 @@ LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session)
return NULL;
}
bl = libssh2_channel_get_blocking(channel);
libssh2_channel_set_blocking(channel, 1);
libssh2_channel_handle_extended_data(channel, LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE);
@@ -500,8 +610,8 @@ LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session)
return NULL;
}
if (libssh2_sftp_packet_require(sftp, SSH_FXP_VERSION, 0,
&data, &data_len)) {
/* For initiallization we are requiring blocking, probably reasonable */
if (libssh2_sftp_packet_require(sftp, SSH_FXP_VERSION, 0, &data, &data_len)) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT,
"Timeout waiting for response from SFTP subsystem", 0);
libssh2_channel_free(channel);
@@ -540,6 +650,9 @@ LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session)
sftp->channel->abstract = sftp;
sftp->channel->close_cb = libssh2_sftp_dtor;
/* Restore the blocking state of the channel */
libssh2_channel_set_blocking(channel, bl);
return sftp;
}
/* }}} */
@@ -547,6 +660,7 @@ LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session)
/* {{{ libssh2_sftp_shutdown
* Shutsdown the SFTP subsystem
*/
/* libssh2_sftp_shutdown - NB-SAFE */
LIBSSH2_API int libssh2_sftp_shutdown(LIBSSH2_SFTP *sftp)
{
return libssh2_channel_free(sftp->channel);
@@ -560,6 +674,7 @@ LIBSSH2_API int libssh2_sftp_shutdown(LIBSSH2_SFTP *sftp)
/* {{{ libssh2_sftp_open_ex
*
*/
/* libssh2_sftp_open_ex - NB-UNSAFE?? */
LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp, const char *filename, unsigned int filename_len, unsigned long flags, long mode, int open_type)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -574,6 +689,7 @@ LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp, const
unsigned char *packet, *data, *s;
static const unsigned char fopen_responses[2] = { SSH_FXP_HANDLE, SSH_FXP_STATUS };
unsigned long request_id;
int rc;
s = packet = LIBSSH2_ALLOC(session, packet_len);
if (!packet) {
@@ -603,7 +719,11 @@ LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp, const
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_requirev(sftp, 2, fopen_responses, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_requirev(sftp, 2, fopen_responses, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return NULL;
}
@@ -656,7 +776,7 @@ LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp, const
/* {{{ _libssh2_sftp_read
* Read from an SFTP file handle blocking/non-blocking depending on state
*/
/* _libssh2_sftp_read - NB-UNSAFE?? */
static ssize_t _libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
char *buffer, size_t buffer_maxlen)
{
@@ -670,6 +790,7 @@ static ssize_t _libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
size_t bytes_read = 0;
size_t bytes_requested = 0;
size_t total_read = 0;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Reading %lu bytes from SFTP handle", (unsigned long)buffer_maxlen);
packet = LIBSSH2_ALLOC(session, packet_len);
@@ -717,8 +838,11 @@ static ssize_t _libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
return -1;
}
if (libssh2_sftp_packet_requirev(sftp, 2, read_responses, request_id,
&data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_requirev(sftp, 2, read_responses, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT,
"Timeout waiting for status message", 0);
return -1;
@@ -763,6 +887,7 @@ static ssize_t _libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
/* {{{ libssh2_sftp_read
* Read from an SFTP file handle blocking
*/
/* libssh2_sftp_read - NB-UNSAFE */
LIBSSH2_API ssize_t libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
char *buffer, size_t buffer_maxlen)
{
@@ -791,6 +916,7 @@ LIBSSH2_API ssize_t libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
/* {{{ libssh2_sftp_readnb
* Read from an SFTP file handle non-blocking
*/
/* libssh2_sftp_readnb - NB-SAFE */
LIBSSH2_API ssize_t libssh2_sftp_readnb(LIBSSH2_SFTP_HANDLE *handle,
char *buffer, size_t buffer_maxlen)
{
@@ -810,30 +936,40 @@ LIBSSH2_API ssize_t libssh2_sftp_readnb(LIBSSH2_SFTP_HANDLE *handle,
}
/* }}} */
/* {{{ libssh2_sftp_readdir
* Read from an SFTP directory handle
/* {{{ _libssh2_sftp_readdir
* Read from an SFTP directory handle blocking/non-blocking depending on state
*/
LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs)
/* _libssh2_sftp_readdir - NB-SAFE */
static int _libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen,
LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
LIBSSH2_SFTP *sftp = handle->sftp;
LIBSSH2_CHANNEL *channel = sftp->channel;
LIBSSH2_SESSION *session = channel->session;
LIBSSH2_SFTP_ATTRIBUTES attrs_dummy;
unsigned long data_len, request_id, filename_len, num_names;
ssize_t packet_len = handle->handle_len + 13; /* packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) */
/* 13 = packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) */
ssize_t packet_len = handle->handle_len + 13;
unsigned char *packet, *s, *data;
static const unsigned char read_responses[2] = { SSH_FXP_NAME, SSH_FXP_STATUS };
unsigned char read_responses[2] = { SSH_FXP_NAME, SSH_FXP_STATUS };
int retcode;
if (sftp->readdir_state == sftp_readdir_idle) {
if (handle->u.dir.names_left) {
/* A prior request returned more than one directory entry, feed it back from the buffer */
/*
* A prior request returned more than one directory entry,
* feed it back from the buffer
*/
unsigned char *s = (unsigned char *)handle->u.dir.next_name;
unsigned long real_filename_len = libssh2_ntohu32(s);
filename_len = real_filename_len; s += 4;
filename_len = real_filename_len;
s += 4;
if (filename_len > buffer_maxlen) {
filename_len = buffer_maxlen;
}
memcpy(buffer, s, filename_len); s += real_filename_len;
memcpy(buffer, s, filename_len);
s += real_filename_len;
/* The filename is not null terminated, make it so if possible */
if (filename_len < buffer_maxlen) {
@@ -853,6 +989,7 @@ LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
LIBSSH2_FREE(session, handle->u.dir.names_packet);
}
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "_libssh2_sftp_readdir() return %d", filename_len);
return filename_len;
}
@@ -860,41 +997,79 @@ LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
s = packet = LIBSSH2_ALLOC(session, packet_len);
if (!packet) {
libssh2_error(session, LIBSSH2_ERROR_ALLOC, "Unable to allocate memory for FXP_READDIR packet", 0);
libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate memory for FXP_READDIR packet", 0);
return -1;
}
libssh2_htonu32(s, packet_len - 4); s += 4;
libssh2_htonu32(s, packet_len - 4);
s += 4;
*(s++) = SSH_FXP_READDIR;
request_id = sftp->request_id++;
libssh2_htonu32(s, request_id); s += 4;
libssh2_htonu32(s, handle->handle_len); s += 4;
memcpy(s, handle->handle, handle->handle_len); s += handle->handle_len;
libssh2_htonu32(s, request_id);
s += 4;
libssh2_htonu32(s, handle->handle_len);
s += 4;
memcpy(s, handle->handle, handle->handle_len);
s += handle->handle_len;
sftp->readdir_state = sftp_readdir_packet_created;
}
else if (sftp->readdir_state == sftp_readdir_packet_created) {
packet = sftp->readdir_packet;
request_id = sftp->readdir_request_id;
sftp->readdir_packet = NULL;
}
if (sftp->readdir_state != sftp_readdir_packet_sent) {
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Reading entries from directory handle");
if (packet_len != libssh2_channel_write(channel, (char *)packet,
packet_len)) {
if (libssh2_channel_get_blocking(channel)) {
if (packet_len != libssh2_channel_write(channel, (char *)packet, packet_len)) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND, "Unable to send FXP_READ command", 0);
LIBSSH2_FREE(session, packet);
sftp->readdir_state = sftp_readdir_idle;
return -1;
}
} else {
if ((retcode = libssh2_channel_writenb(channel, (char *)packet, packet_len)) == PACKET_EAGAIN) {
sftp->readdir_packet = packet;
sftp->readdir_request_id = request_id;
return PACKET_EAGAIN;
}
else if (packet_len != retcode) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND, "Unable to send FXP_READ command", 0);
LIBSSH2_FREE(session, packet);
sftp->readdir_state = sftp_readdir_idle;
return -1;
}
}
if (libssh2_sftp_packet_requirev(sftp, 2, read_responses, request_id, &data, &data_len)) {
LIBSSH2_FREE(session, packet);
sftp->readdir_state = sftp_readdir_packet_sent;
sftp->readdir_packet = NULL;
}
retcode = libssh2_sftp_packet_requirev(sftp, 2, read_responses, request_id, &data, &data_len);
if (retcode == PACKET_EAGAIN) {
return PACKET_EAGAIN;
}
else if (retcode) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
sftp->readdir_state = sftp_readdir_idle;
return -1;
}
if (data[0] == SSH_FXP_STATUS) {
int retcode;
retcode = libssh2_ntohu32(data + 5);
LIBSSH2_FREE(session, data);
if (retcode == LIBSSH2_FX_EOF) {
sftp->readdir_state = sftp_readdir_idle;
return 0;
} else {
sftp->last_errno = retcode;
libssh2_error(session, LIBSSH2_ERROR_SFTP_PROTOCOL, "SFTP Protocol Error", 0);
sftp->readdir_state = sftp_readdir_idle;
return -1;
}
}
@@ -903,6 +1078,7 @@ LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "%lu entries returned", num_names);
if (num_names <= 0) {
LIBSSH2_FREE(session, data);
sftp->readdir_state = sftp_readdir_idle;
return (num_names == 0) ? 0 : -1;
}
@@ -922,10 +1098,12 @@ LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
if (attrs) {
memset(attrs, 0, sizeof(LIBSSH2_SFTP_ATTRIBUTES));
libssh2_sftp_bin2attr(attrs, data + 13 + real_filename_len + (4 + libssh2_ntohu32(data + 13 + real_filename_len)));
libssh2_sftp_bin2attr(attrs, data + 13 + real_filename_len +
(4 + libssh2_ntohu32(data + 13 + real_filename_len)));
}
LIBSSH2_FREE(session, data);
sftp->readdir_state = sftp_readdir_idle;
return filename_len;
}
@@ -933,24 +1111,79 @@ LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
handle->u.dir.names_packet = data;
handle->u.dir.next_name = (char *)data + 9;
sftp->readdir_state = sftp_readdir_idle;
/* Be lazy, just use the name popping mechanism from the start of the function */
return libssh2_sftp_readdir(handle, buffer, buffer_maxlen, attrs);
}
/* }}} */
/* {{{ libssh2_sftp_readdir
* Read from an SFTP directory handle blocking
*/
/* libssh2_sftp_readdir - NB-SAFE */
LIBSSH2_API int libssh2_sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
int rc;
LIBSSH2_CHANNEL *ch = handle->sftp->channel;
int bl = libssh2_channel_get_blocking(ch);
/* set blocking */
libssh2_channel_set_blocking(ch, 1);
rc = _libssh2_sftp_readdir(handle, buffer, buffer_maxlen, attrs);
/* restore state */
libssh2_channel_set_blocking(ch, bl);
if(rc < 0) {
/* precent accidental returning of other return codes since
this API does not support/provide those */
return -1;
}
return rc;
}
/* }}} */
/* {{{ libssh2_sftp_readdirnb
* Read from an SFTP directory handle non-blocking
*/
/* libssh2_sftp_readdirnb - NB-SAFE */
LIBSSH2_API int libssh2_sftp_readdirnb(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
size_t buffer_maxlen, LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
int rc;
LIBSSH2_CHANNEL *ch = handle->sftp->channel;
int bl = libssh2_channel_get_blocking(ch);
/* set non-blocking */
libssh2_channel_set_blocking(ch, 0);
rc = _libssh2_sftp_readdir(handle, buffer, buffer_maxlen, attrs);
/* restore state */
libssh2_channel_set_blocking(ch, bl);
return rc;
}
/* }}} */
/* {{{ _libssh2_sftp_write
* Write data to a file handle
*/
static ssize_t _libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
const char *buffer,
size_t count)
/* _libssh2_sftp_write - NB-UNSAFE?? */
static ssize_t _libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle, const char *buffer, size_t count)
{
LIBSSH2_SFTP *sftp = handle->sftp;
LIBSSH2_CHANNEL *channel = sftp->channel;
LIBSSH2_SESSION *session = channel->session;
unsigned long data_len, request_id, retcode;
ssize_t packet_len = handle->handle_len + count + 25; /* packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) + offset(8) + count(4) */
/* 25 = packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) + offset(8) + count(4) */
ssize_t packet_len = handle->handle_len + count + 25;
unsigned char *packet, *s, *data;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Writing %lu bytes", (unsigned long)count);
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -969,17 +1202,40 @@ static ssize_t _libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
libssh2_htonu32(s, count); s += 4;
memcpy(s, buffer, count); s += count;
if (libssh2_channel_get_blocking(channel)) {
if (packet_len != libssh2_channel_write(channel, (char *)packet, packet_len)) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND, "Unable to send FXP_WRITE command", 0);
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND, "Unable to send FXP_READ command", 0);
LIBSSH2_FREE(session, packet);
return -1;
}
} else {
if ((rc = libssh2_channel_writenb(channel, (char *)packet, packet_len)) == PACKET_EAGAIN) {
LIBSSH2_FREE(session, packet);
return PACKET_EAGAIN;
}
if (packet_len != rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND, "Unable to send FXP_READ command", 0);
LIBSSH2_FREE(session, packet);
return -1;
}
}
LIBSSH2_FREE(session, packet);
if (libssh2_channel_get_blocking(channel)) {
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
} else {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (packet_len != rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
}
retcode = libssh2_ntohu32(data + 5);
LIBSSH2_FREE(session, data);
@@ -998,6 +1254,7 @@ static ssize_t _libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
/* {{{ libssh2_sftp_write
* Write data to a SFTP handle blocking
*/
/* libssh2_sftp_write - NB-UNSAFE */
LIBSSH2_API ssize_t libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
const char *buffer, size_t count)
{
@@ -1020,6 +1277,7 @@ LIBSSH2_API ssize_t libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle,
/* {{{ libssh2_sftp_write
* Write data to a SFTP handle non-blocking
*/
/* libssh2_sftp_writenb - NB-UNSAFE?? */
LIBSSH2_API ssize_t libssh2_sftp_writenb(LIBSSH2_SFTP_HANDLE *handle,
const char *buffer, size_t count)
{
@@ -1042,6 +1300,7 @@ LIBSSH2_API ssize_t libssh2_sftp_writenb(LIBSSH2_SFTP_HANDLE *handle,
/* {{{ libssh2_sftp_fstat_ex
* Get or Set stat on a file
*/
/* libssh2_sftp_fstat_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_fstat_ex(LIBSSH2_SFTP_HANDLE *handle, LIBSSH2_SFTP_ATTRIBUTES *attrs, int setstat)
{
LIBSSH2_SFTP *sftp = handle->sftp;
@@ -1052,6 +1311,7 @@ LIBSSH2_API int libssh2_sftp_fstat_ex(LIBSSH2_SFTP_HANDLE *handle, LIBSSH2_SFTP_
/* packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) */
unsigned char *packet, *s, *data;
static const unsigned char fstat_responses[2] = { SSH_FXP_ATTRS, SSH_FXP_STATUS };
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Issuing %s command", setstat ? "set-stat" : "stat");
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1077,7 +1337,11 @@ LIBSSH2_API int libssh2_sftp_fstat_ex(LIBSSH2_SFTP_HANDLE *handle, LIBSSH2_SFTP_
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_requirev(sftp, 2, fstat_responses, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_requirev(sftp, 2, fstat_responses, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1105,6 +1369,7 @@ LIBSSH2_API int libssh2_sftp_fstat_ex(LIBSSH2_SFTP_HANDLE *handle, LIBSSH2_SFTP_
/* {{{ libssh2_sftp_seek
* Set the read/write pointer to an arbitrary position within the file
*/
/* libssh2_sftp_seek - NB-UNSAFE?? */
LIBSSH2_API void libssh2_sftp_seek(LIBSSH2_SFTP_HANDLE *handle, size_t offset)
{
handle->u.file.offset = offset;
@@ -1114,6 +1379,7 @@ LIBSSH2_API void libssh2_sftp_seek(LIBSSH2_SFTP_HANDLE *handle, size_t offset)
/* {{{ libssh2_sftp_tell
* Return the current read/write pointer's offset
*/
/* libssh2_sftp_tell - NB-UNSAFE?? */
LIBSSH2_API size_t libssh2_sftp_tell(LIBSSH2_SFTP_HANDLE *handle)
{
return handle->u.file.offset;
@@ -1125,6 +1391,7 @@ LIBSSH2_API size_t libssh2_sftp_tell(LIBSSH2_SFTP_HANDLE *handle)
* Close a file or directory handle
* Also frees handle resource and unlinks it from the SFTP structure
*/
/* libssh2_sftp_close_handle - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle)
{
LIBSSH2_SFTP *sftp = handle->sftp;
@@ -1133,6 +1400,7 @@ LIBSSH2_API int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle)
unsigned long data_len, retcode, request_id;
ssize_t packet_len = handle->handle_len + 13; /* packet_len(4) + packet_type(1) + request_id(4) + handle_len(4) */
unsigned char *packet, *s, *data;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Closing handle");
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1155,7 +1423,11 @@ LIBSSH2_API int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle)
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1195,6 +1467,7 @@ LIBSSH2_API int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle)
/* {{{ libssh2_sftp_unlink_ex
* Delete a file from the remote server
*/
/* libssh2_sftp_unlink_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_unlink_ex(LIBSSH2_SFTP *sftp, const char *filename, unsigned int filename_len)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -1202,6 +1475,7 @@ LIBSSH2_API int libssh2_sftp_unlink_ex(LIBSSH2_SFTP *sftp, const char *filename,
unsigned long data_len, retcode, request_id;
ssize_t packet_len = filename_len + 13; /* packet_len(4) + packet_type(1) + request_id(4) + filename_len(4) */
unsigned char *packet, *s, *data;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Unlinking %s", filename);
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1225,7 +1499,11 @@ LIBSSH2_API int libssh2_sftp_unlink_ex(LIBSSH2_SFTP *sftp, const char *filename,
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1246,6 +1524,7 @@ LIBSSH2_API int libssh2_sftp_unlink_ex(LIBSSH2_SFTP *sftp, const char *filename,
/* {{{ libssh2_sftp_rename_ex
* Rename a file on the remote server
*/
/* libssh2_sftp_rename_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_rename_ex(LIBSSH2_SFTP *sftp, const char *source_filename, unsigned int source_filename_len,
const char *dest_filename, unsigned int dest_filename_len,
long flags)
@@ -1257,6 +1536,7 @@ LIBSSH2_API int libssh2_sftp_rename_ex(LIBSSH2_SFTP *sftp, const char *source_f
/* packet_len(4) + packet_type(1) + request_id(4) +
source_filename_len(4) + dest_filename_len(4) + flags(4){SFTP5+) */
unsigned char *packet, *s, *data;
int rc;
if (sftp->version < 2) {
libssh2_error(session, LIBSSH2_ERROR_SFTP_PROTOCOL, "Server does not support RENAME", 0);
@@ -1291,7 +1571,11 @@ LIBSSH2_API int libssh2_sftp_rename_ex(LIBSSH2_SFTP *sftp, const char *source_f
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1326,6 +1610,7 @@ LIBSSH2_API int libssh2_sftp_rename_ex(LIBSSH2_SFTP *sftp, const char *source_f
/* {{{ libssh2_sftp_mkdir_ex
* Create a directory
*/
/* libssh2_sftp_mkdir_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_mkdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, long mode)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -1337,6 +1622,7 @@ LIBSSH2_API int libssh2_sftp_mkdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
ssize_t packet_len = path_len + 13 + libssh2_sftp_attrsize(&attrs);
/* packet_len(4) + packet_type(1) + request_id(4) + path_len(4) */
unsigned char *packet, *s, *data;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Creating directory %s with mode 0%lo", path, mode);
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1363,7 +1649,11 @@ LIBSSH2_API int libssh2_sftp_mkdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1384,6 +1674,7 @@ LIBSSH2_API int libssh2_sftp_mkdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
/* {{{ libssh2_sftp_rmdir_ex
* Remove a directory
*/
/* libssh2_sftp_rmdir_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_rmdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -1391,6 +1682,7 @@ LIBSSH2_API int libssh2_sftp_rmdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
unsigned long data_len, retcode, request_id;
ssize_t packet_len = path_len + 13; /* packet_len(4) + packet_type(1) + request_id(4) + path_len(4) */
unsigned char *packet, *s, *data;
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "Removing directory: %s", path);
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1413,7 +1705,11 @@ LIBSSH2_API int libssh2_sftp_rmdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_require(sftp, SSH_FXP_STATUS, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1434,6 +1730,7 @@ LIBSSH2_API int libssh2_sftp_rmdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsi
/* {{{ libssh2_sftp_stat_ex
* Stat a file or symbolic link
*/
/* libssh2_sftp_stat_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_stat_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, int stat_type, LIBSSH2_SFTP_ATTRIBUTES *attrs)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -1443,6 +1740,7 @@ LIBSSH2_API int libssh2_sftp_stat_ex(LIBSSH2_SFTP *sftp, const char *path, unsig
/* packet_len(4) + packet_type(1) + request_id(4) + path_len(4) */
unsigned char *packet, *s, *data;
static const unsigned char stat_responses[2] = { SSH_FXP_ATTRS, SSH_FXP_STATUS };
int rc;
_libssh2_debug(session, LIBSSH2_DBG_SFTP, "%s %s", (stat_type == LIBSSH2_SFTP_SETSTAT) ? "Set-statting" : (stat_type == LIBSSH2_SFTP_LSTAT ? "LStatting" : "Statting"), path);
s = packet = LIBSSH2_ALLOC(session, packet_len);
@@ -1479,7 +1777,11 @@ LIBSSH2_API int libssh2_sftp_stat_ex(LIBSSH2_SFTP *sftp, const char *path, unsig
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_requirev(sftp, 2, stat_responses, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_requirev(sftp, 2, stat_responses, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1509,6 +1811,7 @@ LIBSSH2_API int libssh2_sftp_stat_ex(LIBSSH2_SFTP *sftp, const char *path, unsig
/* {{{ libssh2_sftp_symlink_ex
* Read or set a symlink
*/
/* libssh2_sftp_symlink_ex - NB-UNSAFE?? */
LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, char *target, unsigned int target_len, int link_type)
{
LIBSSH2_CHANNEL *channel = sftp->channel;
@@ -1518,6 +1821,7 @@ LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, un
/* packet_len(4) + packet_type(1) + request_id(4) + path_len(4) */
unsigned char *packet, *s, *data;
static const unsigned char link_responses[2] = { SSH_FXP_NAME, SSH_FXP_STATUS };
int rc;
if ((sftp->version < 3) &&
(link_type != LIBSSH2_SFTP_REALPATH)) {
@@ -1562,7 +1866,11 @@ LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, un
}
LIBSSH2_FREE(session, packet);
if (libssh2_sftp_packet_requirev(sftp, 2, link_responses, request_id, &data, &data_len)) {
/* #warning "XXX - Looping on PACKET_EAGAIN (blocking) until fix is migrated up farther" */
while ((rc = libssh2_sftp_packet_requirev(sftp, 2, link_responses, request_id, &data, &data_len)) == PACKET_EAGAIN) {
;
}
if (rc) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_TIMEOUT, "Timeout waiting for status message", 0);
return -1;
}
@@ -1602,8 +1910,30 @@ LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, un
/* {{{ libssh2_sftp_last_error
* Returns the last error code reported by SFTP
*/
/* libssh2_sftp_last_error - NB-SAFE */
LIBSSH2_API unsigned long libssh2_sftp_last_error(LIBSSH2_SFTP *sftp)
{
return sftp->last_errno;
}
/* }}} */
/* {{{ libssh2_sftp_set_blocking
* Set a channel's blocking mode on or off, this is an accessor
* to the channel through the SFTP session handle
*/
/* libssh2_sftp_set_blocking - NB-SAFE */
LIBSSH2_API void libssh2_sftp_set_blocking(LIBSSH2_SFTP *session, int blocking) {
libssh2_channel_set_blocking(session->channel, blocking);
}
/* }}} */
/* {{{ libssh2_sftp_get_blocking
* Returns a channel's blocking mode on or off, this is an accessor
* to the channel through the SFTP session handle
*/
/* libssh2_sftp_get_blocking - NB-SAFE */
LIBSSH2_API int libssh2_sftp_get_blocking(LIBSSH2_SFTP *session) {
return libssh2_channel_get_blocking(session->channel);
}
/* }}} */