signal.h — Exception handling

The signal.h header file defines the following values.

Functions:

raise() signal()
Macros:

SIG_DFL SIG_ERR SIG_IGN SIG_PROMOTE
Signals:

SIGABND SIGABRT SIGFPE SIGILL SIGINT

SIGIOERR SIGSEGV SIGTERM SIGUSR1 SIGUSR2
The type sig_atomic_t, which is the largest integer type the processor can load or store automatically in the presence of asynchronous interrupts.

The following functions are supported only in a POSIX program. You must specify the POSIX(ON) runtime option for these functions.

kill()

sigaction()

__sigactionset()

sigaddset()

sigdelset()

sigemptyset()

sigfillset()

sigismember()

siglongjmp()

sigpending()

sigprocmask()

sigsuspend()

sigtimedwait()

sigwait()

sigwaitinfo()

The following values are available in z/OS® UNIX only:

Signals:

SIGALRM SIGCHLD SIGCLD SIGCONT SIGHUP

SIGIO SIGKILL SIGPIPE SIGQUIT SIGSTOP

SIGTHCONT SIGTHSTOP SIGTRACE SIGTRAP SIGTSTP

SIGTTIN SIGTTOU
The structures sigaction, __sigactionset_t, __sigactionset_s, sigset_t, and pid_t.
options arguments for sigprocmask(): SIG_BLOCK, SIG_UNBLOCK, and SIG_SETMASK.
Flags for the sa_flags field, available in z/OS UNIX only: SA_NOCLDSTOP and _SA_OLD_STYLE.

_XOPEN_SOURCE_EXTENDED 1:

Signals:

SIGBUS SIGPOLL SIGPROF SIGSYS SIGURG

SIGXCPU SIGXFSZ SIGVTALRM SIGWINCH
Functions:

bsd_signal() killpg() sigaltstack() sighold() sigignore()

siginterrupt() sigpause() sigrelse() sigset() sigstack()

Note: bsd_signal() has been marked obsolescent in Single UNIX Specification, Version 3 and may be withdrawn in a future version. The sigaction() function is preferred for portability.

_OPEN_THREADS 2:

_UNIX03_THREADS: