niceSOFT/libssh2: the SSH library

docs/libssh2_sftp_read.3

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Daniel Stenberg

remove embedded CVS/svn tags

09 сен 2011, 18:12

09 сен 2011, 18:1287f79f1

.TH libssh2_sftp_read 3 "1 Jun 2007" "libssh2 0.15" "libssh2 manual"
.SH NAME
libssh2_sftp_read - read data from an SFTP handle
.SH SYNOPSIS
#include <libssh2.h>
#include <libssh2_sftp.h>

ssize_t 
libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen);

.SH DESCRIPTION
\fIhandle\fP is the SFTP File Handle as returned by 
.BR libssh2_sftp_open_ex(3)

\fIbuffer\fP is a pointer to a pre-allocated buffer of at least

\fIbuffer_maxlen\fP bytes to read data into.

Reads a block of data from an LIBSSH2_SFTP_HANDLE. This method is modelled
after the POSIX 
.BR read(2)
function and uses the same calling semantics. 
.BR libssh2_sftp_read(3)
will attempt to read as much as possible however it may not fill all of buffer
if the file pointer reaches the end or if further reads would cause the socket
to block.
.SH RETURN VALUE
Number of bytes actually populated into buffer, or negative on failure.  
It returns LIBSSH2_ERROR_EAGAIN when it would otherwise block. While
LIBSSH2_ERROR_EAGAIN is a negative number, it isn't really a failure per se.
.SH ERRORS
\fILIBSSH2_ERROR_ALLOC\fP -  An internal memory allocation call failed.

\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.

\fILIBSSH2_ERROR_SOCKET_TIMEOUT\fP - 

\fILIBSSH2_ERROR_SFTP_PROTOCOL\fP - An invalid SFTP protocol response was
received on the socket, or an SFTP operation caused an errorcode to be
returned by the server.
.SH SEE ALSO
.BR libssh2_sftp_open_ex(3)
.BR libssh2_sftp_read(3)