---
name: "libssh2_channel_signal_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_signal_ex"
---

# libssh2\_channel\_signal\_ex(3)

## NAME

libssh2\_channel\_signal\_ex -- Send a signal to process previously opened on channel.

## SYNOPSIS

```
#include <libssh2.h>
int
libssh2_channel_signal_ex(LIBSSH2_CHANNEL *channel,
                          const char *signame,
                          size_t signame_len)
```

## DESCRIPTION

A signal can be delivered to the remote process/service. Some servers or systems may not implement signals, in which case they will probably ignore this message.

*channel* - Previously opened channel instance such as returned by **[libssh2\_channel\_open\_ex(3)](/libssh2_channel_open_ex/3.md)**

*signame* - The signal name is the same as the signal name constant, without the leading "SIG".

*signame\_len* - Length of passed signal name parameter.

There is also a macro *libssh2\_channel\_signal(channel, signame)* that supplies the strlen of the signame.

## RETURN VALUE

Normal channel error codes. LIBSSH2\_ERROR\_EAGAIN when it would block.

## SEE ALSO

**[libssh2\_channel\_get\_exit\_signal(3)](/libssh2_channel_get_exit_signal/3.md)**