[csignal.syn]

# 17 Language support library [[support]](./#support)

## 17.14 Other runtime support [[support.runtime]](support.runtime#csignal.syn)

### 17.14.4 Header <csignal> synopsis [csignal.syn]

[🔗](#lib:sig_atomic_t)

namespace std {using sig_atomic_t = *see below*; // [[support.signal]](support.signal "17.14.5 Signal handlers"), signal handlersextern "C" using *signal-handler* = void(int); // *exposition only**signal-handler** signal(int sig, *signal-handler** func); int raise(int sig);}#define SIG_DFL *see below*#define SIG_ERR *see below*#define SIG_IGN *see below*#define SIGABRT *see below*#define SIGFPE *see below*#define SIGILL *see below*#define SIGINT *see below*#define SIGSEGV *see below*#define SIGTERM *see below*

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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L6485)

The contents of the header <csignal> are the same as the C
standard library header [<signal.h>](support.c.headers.general#header:%3csignal.h%3e "17.15.1 General [support.c.headers.general]")[.](#1.sentence-1)