HelenOS sources

root/uspace/lib/posix/include/posix/signal.h

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/*
 * Copyright (c) 2011 Jiri Zarevucky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libposix
 * @{
 */
/** @file Signal handling.
 */

#ifndef POSIX_SIGNAL_H_
#define POSIX_SIGNAL_H_

#include <sys/types.h>
#include <ucontext.h>

#define SIG_DFL ((void (*)(int)) __posix_default_signal_handler)
#define SIG_ERR ((void (*)(int)) NULL)
#define SIG_HOLD ((void (*)(int)) __posix_hold_signal_handler)
#define SIG_IGN ((void (*)(int)) __posix_ignore_signal_handler)

/* Values of sigevent::sigev_notify */
#define SIGEV_NONE 0
#define SIGEV_SIGNAL 0
#define SIGEV_THREAD 0

#define SIGRT_MIN 0
#define SIGRT_MAX 0

#define SIG_BLOCK 0
#define SIG_UNBLOCK 1
#define SIG_SETMASK 2

#define SA_NOCLDSTOP (1 << 0)
#define SA_ONSTACK (1 << 1)
#define SA_RESETHAND (1 << 2)
#define SA_RESTART (1 << 3)
#define SA_SIGINFO (1 << 4)
#define SA_NOCLDWAIT (1 << 5)
#define SA_NODEFER (1 << 6)

#define SS_ONSTACK 0
#define SS_DISABLE 0

#define MINSIGSTKSZ 0
#define SIGSTKSZ 0

__C_DECLS_BEGIN;

extern void __posix_default_signal_handler(int signo);
extern void __posix_hold_signal_handler(int signo);
extern void __posix_ignore_signal_handler(int signo);

typedef struct {
        int si_signo;
        int si_code;

        int si_errno;

        pid_t si_pid;
        uid_t si_uid;
        void *si_addr;
        int si_status;

        long si_band;

        union sigval si_value;
} siginfo_t;

struct sigaction {
        void (*sa_handler)(int);
        sigset_t sa_mask;
        int sa_flags;
        void (*sa_sigaction)(int, siginfo_t *, void *);
};

/* Full POSIX set */
enum {
        /* Termination Signals */
        SIGABRT,
        SIGQUIT,
        SIGINT,
        SIGTERM,

        /* Child Signal */
        SIGCHLD,

        /* User signals */
        SIGUSR1,
        SIGUSR2,

        /* Timer */
        SIGALRM,
        SIGVTALRM,
        SIGPROF, /* obsolete */

        _TOP_CATCHABLE_SIGNAL = SIGPROF,

        /* Process Scheduler Interaction - not supported */
        SIGSTOP,
        SIGCONT,

        /* Process Termination - can't be caught */
        SIGKILL,

        _TOP_SENDABLE_SIGNAL = SIGKILL,

        /* Hardware Exceptions - can't be caught or sent */
        SIGFPE,
        SIGBUS,
        SIGILL,
        SIGSEGV,

        /* Other Exceptions - not supported */
        SIGSYS,
        SIGXCPU,
        SIGXFSZ,

        /* Debugging - not supported */
        SIGTRAP,

        /* Communication Signals - not supported */
        SIGHUP,
        SIGPIPE,
        SIGPOLL, /* obsolete */
        SIGURG,

        /* Terminal Signals - not supported */
        SIGTSTP,
        SIGTTIN,
        SIGTTOU,

        _TOP_SIGNAL = SIGTTOU
};

/* Values for sigaction field si_code. */
enum {
        SI_USER,
        SI_QUEUE,
        SI_TIMER,
        SI_ASYNCIO,
        SI_MESGQ,
        ILL_ILLOPC,
        ILL_ILLOPN,
        ILL_ILLADR,
        ILL_ILLTRP,
        ILL_PRVOPC,
        ILL_PRVREG,
        ILL_COPROC,
        ILL_BADSTK,
        FPE_INTDIV,
        FPE_INTOVF,
        FPE_FLTDIV,
        FPE_FLTOVF,
        FPE_FLTUND,
        FPE_FLTRES,
        FPE_FLTINV,
        FPE_FLTSUB,
        SEGV_MAPERR,
        SEGV_ACCERR,
        BUS_ADRALN,
        BUS_ADRERR,
        BUS_OBJERR,
        TRAP_BRKPT,
        TRAP_TRACE,
        CLD_EXITED,
        CLD_KILLED,
        CLD_DUMPED,
        CLD_TRAPPED,
        CLD_STOPPED,
        CLD_CONTINUED,
        POLL_IN,
        POLL_OUT,
        POLL_MSG,
        POLL_ERR,
        POLL_PRI,
        POLL_HUP
};

extern int sigaction(int sig, const struct sigaction *__restrict__ act,
    struct sigaction *__restrict__ oact);

extern void (*signal(int sig, void (*func)(int)))(int);
extern int raise(int sig);
extern int kill(pid_t pid, int sig);
extern int killpg(pid_t pid, int sig);

extern void psiginfo(const siginfo_t *pinfo, const char *message);
extern void psignal(int signum, const char *message);

extern int sigemptyset(sigset_t *set);
extern int sigfillset(sigset_t *set);
extern int sigaddset(sigset_t *set, int signo);
extern int sigdelset(sigset_t *set, int signo);
extern int sigismember(const sigset_t *set, int signo);

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

__C_DECLS_END;

#endif /* POSIX_SIGNAL_H_ */

/** @}
 */