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Files

Viktor Szakats b889b39945 docs: convert man page sources to "curldown" format

To render in Git webviews as-is, to make it easier to edit, verify,
and to sync up with curl.

- add options to not build the `.3` man pages:
  - autotools: `--disable-docs`
  - cmake: `LIBSSH2_BUILD_DOCS=OFF`
- building `.3` man pages requires Perl after this patch.
- drop `mansyntax` and the shell / `grep` / GNU `man` tool requirements with it.
- scripts and most logic were copied from curl.
- add `cd2nroff` from curl, with edits to relax curl-specific checks.
- used `nroff2cd` (from curl) to convert from `.3` to `.md`. Then
  manually fixed copyrights, inline function references and a couple
  of other things.

Credits-to: Daniel Stenberg

Ref: eefcc1bda4
Ref: https://github.com/curl/curl/pull/12730
Ref: https://github.com/libssh2/www/issues/25#issuecomment-3289431671

Closes #1660

2025-10-09 04:05:38 +02:00

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c, SPDX-License-Identifier, Title, Section, Source, See-also

SPDX-License-Identifier

Title

Section

Source

See-also

BSD-3-Clause

libssh2_sftp_read

libssh2

libssh2_sftp_open_ex(3)

libssh2_sftp_read(3)

read(2)

NAME

libssh2_sftp_read - read data from an SFTP handle

SYNOPSIS

#include <libssh2.h>
#include <libssh2_sftp.h>

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

DESCRIPTION

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.

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 is not really a failure per se.

ERRORS

LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.

LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

LIBSSH2_ERROR_SOCKET_TIMEOUT -

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.

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