HP-UX Reference (11i v1 05/09) - 5 Miscellaneous Topics (vol 9)

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signal(5) signal(5)

different value from the ones described in this list for circumstances described in this list.

In addition, the following signal-speciﬁc information will be available:

Signal Member Value

SIGILL void * si_addr address of faulting instruction

SIGFP

SIGSEGV void * si_addr address of faulting memory reference

SIGBUS

SIGCHLD pid_t si_pid child process ID

int si_status exit value or signal

real user ID of the process that sent

the signal

uid_t si_uid

band event for

POLL_IN,

POLL_OUT,orPOLL_MSG

SIGPOLL long si_band

For some implementations, the value of si_addr may be inaccurate.

The following are declared as functions and may also be deﬁned as macros:

void (*bsd_signal(int sig, void (*func)(int)))(int);

int kill(pid_t pid, int sig);

int killpg(pid_t pgrp, int sig);

int raise(int sig);

int sigaction(int sig, const struct sigaction

*act, struct sigaction *oact);

int sigaddset(sigset_t *set, int signo);

int sigaltstack(const stack_t *ss, stack_t *oss);

int sigdelset(sigset_t *set, int signo);

int sigemptyset(sigset_t *set);

int sigfillset(sigset_t *set);

int sighold(int sig);

int sigignore(int sig);

int siginterrupt(int sig, int flag);

int sigismember(const sigset_t *set, int signo);

int sigmask(int signum);

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

int sigpause(int sig);

int sigpending(sigset_t *set);

int sigprocmask(int how, const sigset_t *set, sigset_t *oset);

int sigqueue(pid_t pid, int sig, const union sigval value);

int sigrelse(int sig);

void *sigset(int sig, void (*disp)(int)))(int);

int sigstack(struct sigstack *ss,

struct sigstack *oss);

int sigsuspend(const sigset_t *sigmask);

int sigtimedwait(const sigset_t *set, siginfo_t * info,

const struct timespec *timeout);

int sigwait(const sigset_t *set, int *sig);

int sigwaitinfo(const sigset_t *set, siginfo_t * info);

APPLICATION USAGE

Threads Considerations

The following summarizes the signal model for threads:

A signal mask which speciﬁes the signals blocked from delivery is associated with each thread.

The signal disposition, catch/ignore/default, is a process attribute and is shared by all threads in the

process.

If the signal action for a signal speciﬁes termination, stop or continue, all threads within the process

are terminated, stopped or continued, respectively. This is the case regardless of whether the signal

HP-UX 11i Version 1: September 2005 − 5 − Hewlett-Packard Company Section 5−−347