Advanced Programming in the UNIX® Environment

ptg10805159

Appendix A Function Prototypes 885

int sigdelset(sigset_t *set,intsigno);

<signal.h> p. 344

Returns: 0 if OK,−1 on error

int sigemptyset(sigset_t *set);

<signal.h> p. 344

Returns: 0 if OK,−1 on error

int sigfillset(sigset_t *set);

<signal.h> p. 344

Returns: 0 if OK,−1 on error

int sigismember(const sigset_t *set,intsigno);

<signal.h> p. 344

Returns: 1 if true, 0 if false,−1 on error

void siglongjmp(sigjmp_bufenv,intval);

<setjmp.h> p. 356

This function never returns

void (*signal(intsigno,void (*func)(int)))(int);

<signal.h> p. 323

Returns: previous disposition of signal if OK,

SIG_ERRon error

int sigpending(sigset_t *set);

<signal.h> p. 347

Returns: 0 if OK,−1 on error

int sigprocmask(inthow,const sigset_t *restrictset,

sigset_t *restrictoset);

<signal.h> p. 346

how:SIG_BLOCK, SIG_UNBLOCK, SIG_SETMASK

Returns: 0 if OK,−1 on error

int sigqueue(pid_tpid,intsigno,const union sigvalvalue)

<signal.h> p. 376

Returns: 0 if OK,−1 on error

int sigsetjmp(sigjmp_bufenv,intsavemask);

<setjmp.h> p. 356

Returns: 0 if called directly,nonzero if returning from a call

tosiglongjmp