---
name: "libssh2_channel_window_read_ex"
section: "3"
platform: "linux"
package: "libssh2"
version: "1.11.1-7"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libssh2_channel_window_read_ex"
---

# libssh2\_channel\_window\_read\_ex(3)

Check the status of the read window

## NAME

libssh2\_channel\_window\_read\_ex - Check the status of the read window

## SYNOPSIS

```
#include <libssh2.h>
unsigned long
libssh2_channel_window_read_ex(LIBSSH2_CHANNEL *channel,
                               unsigned long *read_avail,
                               unsigned long *window_size_initial)
```

## DESCRIPTION

Check the status of the read window. Returns the number of bytes which the remote end may send without overflowing the window limit read\_avail (if passed) will be populated with the number of bytes actually available to be read window\_size\_initial (if passed) will be populated with the window\_size\_initial as defined by the channel\_open request

## RETURN VALUE

The number of bytes which the remote end may send without overflowing the window limit

## ERRORS

## SEE ALSO

**[libssh2\_channel\_receive\_window\_adjust(3)](/libssh2_channel_receive_window_adjust/3.md),** **[libssh2\_channel\_window\_write\_ex(3)](/libssh2_channel_window_write_ex/3.md)**