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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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9
include/libssh2_sftp.h
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@@ -166,8 +166,10 @@ struct _LIBSSH2_SFTP_ATTRIBUTES {
#define LIBSSH2_FX_NO_MEDIA 13
#define LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM 14
#define LIBSSH2_FX_QUOTA_EXCEEDED 15
#define LIBSSH2_FX_UNKNOWN_PRINCIPLE 16
#define LIBSSH2_FX_LOCK_CONFlICT 17
#define LIBSSH2_FX_UNKNOWN_PRINCIPLE 16 /* Initial mis-spelling */
#define LIBSSH2_FX_UNKNOWN_PRINCIPAL 16
#define LIBSSH2_FX_LOCK_CONFlICT 17 /* Initial mis-spelling */
#define LIBSSH2_FX_LOCK_CONFLICT 17
#define LIBSSH2_FX_DIR_NOT_EMPTY 18
#define LIBSSH2_FX_NOT_A_DIRECTORY 19
#define LIBSSH2_FX_INVALID_FILENAME 20
@@ -244,9 +246,6 @@ 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