---
name: "raise"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd", "macos"]
url: "https://new.carta.tech/raise"
---

# raise(3)

send a signal to the current thread

## NAME

**raise** – send a signal to the current thread

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

**#include \<signal.h\>**

*int*\

**raise**(*int sig*);

## DESCRIPTION

The **raise**() function sends the signal *sig* to the current thread.

## RETURN VALUES

The **raise()** function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

## ERRORS

The **raise**() function may fail and set *errno* for any of the errors specified for the library functions [getpid(2)](/getpid/2.md) and [kill(2)](/kill/2.md).

## SEE ALSO

[kill(2)](/kill/2.md)

## STANDARDS

The **raise**() function conforms to ISO/IEC 9899:1990 (“ISO C90”).