libssh2_sftp_read - read data from an SFTP handle
#include <libssh2.h> #include <libssh2_sftp.h>
ssize_t libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
handle is the SFTP File Handle as returned by libssh2_sftp_open_ex(3)
buffer is a pointer to a pre-allocated buffer of at least
buffer_maxlen bytes to read data into.
Reads a block of data from an LIBSSH2_SFTP_HANDLE. This method is
modelled after the POSIX read(2) function and uses the same calling
semantics. 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.
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
LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.
LIBSSH2_ERROR_SFTP_PROTOCOL - An invalid SFTP protocol response was
received on the socket, or an SFTP operation caused an errorcode to be
returned by the server.