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Modify the code to truely support non-blocking. Propogate the EAGAIN error

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all the way up to the user interface.  All code modules bug sftp.c have
been completed.

Functions that return an "int", or similar return LIBSSH2CHANNEL_EAGAIN to
indicate some part of the call would block, in non-blocking mode.

Functions that return a structure, like "LIBSSH2_CHANNEL *", return NULL
and set the libssh2 error.  The error can be obtained with either
libssh2_session_last_error() or libssh2_session_last_errno().  Either of
these will return the error code of LIBSSH2_ERROR_EAGAIN if the
call would block, in non-blocking mode.

The current state of a function and some variable are keep in the
structures so that on the next call the operation that would block can
be retried again with the same data.
This commit is contained in:
James Housley
2007-06-06 12:34:06 +00:00
parent 9896c291e4
commit 4b8db8c1ab
38 changed files with 6982 additions and 4403 deletions
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docs/libssh2_channel_wait_eof.3 Normal file
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.\" $Id: libssh2_channel_wait_eof.3,v 1.1 2007/06/06 12:34:06 jehousley Exp $
.\"
.TH libssh2_channel_wait_eof 3 "1 June 2007" "libssh2 0.15" "libssh2 manual"
.SH NAME
libssh2_channel_wait_eof - wait for the remote to reply to an EOF request
.SH SYNOPSIS
#include <libssh2.h>
int libssh2_channel_wait_eof(LIBSSH2_CHANNEL *channel);
.SH DESCRIPTION
Wait for the remote end to acknowledge an EOF request.
.SH RETURN VALUE
Return 0 on success or negative on failure. It returns
LIBSSH2CHANNEL_EAGAIN when it would otherwise block. While
LIBSSH2CHANNEL_EAGAIN is a negative number, it isn't really a failure per se.
.SH "SEE ALSO"
.BI libssh2_channel_send_eof(3), libssh2_channel_eof(3)