#include "sig.h"

#include <signal.h>

/**
  @file sig.c
  @authors djb, jmh
  @ref qmail
  @brief signal handling functions
*/

void sig_alarmblock()
{
  sig_block(SIGALRM);
}

void sig_alarmunblock()
{
  sig_unblock(SIGALRM);
}

void sig_alarmcatch(void (*f)(void))
{
  sig_catch(SIGALRM, (void (*)(int))f);
}

void sig_alarmdefault()
{
  sig_catch(SIGALRM, SIG_DFL);
}

int sig_alarm = SIGALRM;

void sig_block(int sig)
{
  sigset_t ss;
  sigemptyset(&ss);
  sigaddset(&ss, sig);
  sigprocmask(SIG_BLOCK, &ss, (sigset_t *)0);
}

void sig_unblock(int sig)
{
  sigset_t ss;
  sigemptyset(&ss);
  sigaddset(&ss, sig);
  sigprocmask(SIG_UNBLOCK, &ss, (sigset_t *)0);
}

void sig_blocknone()
{
  sigset_t ss;
  sigemptyset(&ss);
  sigprocmask(SIG_SETMASK, &ss, (sigset_t *)0);
}

void sig_catch(int sig, void (*f)(int))
{
  struct sigaction sa;
  sa.sa_handler = f;
  sa.sa_flags = 0;
  sigemptyset(&sa.sa_mask);
  sigaction(sig, &sa, (struct sigaction *)0);
}

void sig_pause()
{
  sigset_t ss;
  sigemptyset(&ss);
  sigsuspend(&ss);
}

void sig_pipeignore()
{
  sig_catch(SIGPIPE, SIG_IGN);
}

void sig_pipedefault()
{
  sig_catch(SIGPIPE, SIG_DFL);
}

int sig_pipe = SIGPIPE;

void sig_childblock()
{
  sig_block(SIGCHLD);
}

void sig_childunblock()
{
  sig_unblock(SIGCHLD);
}

void sig_childcatch(void (*f)(void))
{
  sig_catch(SIGCHLD, (void (*)(int))f);
}

void sig_childdefault()
{
  sig_catch(SIGCHLD, SIG_DFL);
}

int sig_child = SIGCHLD;

void sig_hangupblock()
{
  sig_block(SIGHUP);
}

void sig_hangupunblock()
{
  sig_unblock(SIGHUP);
}

void sig_hangupcatch(void (*f)(void))
{
  sig_catch(SIGHUP, (void (*)(int))f);
}

void sig_hangupdefault()
{
  sig_catch(SIGHUP, SIG_DFL);
}

int sig_hangup = SIGHUP;

void sig_termblock()
{
  sig_block(SIGTERM);
}

void sig_termunblock()
{
  sig_unblock(SIGTERM);
}

void sig_termcatch(void (*f)(void))
{
  sig_catch(SIGTERM, (void (*)(int))f);
}

void sig_termdefault()
{
  sig_catch(SIGTERM, SIG_DFL);
}

int sig_term = SIGTERM;

void sig_bugcatch(void (*f)(int))
{
  sig_catch(SIGILL, f);
  sig_catch(SIGABRT, f);
  sig_catch(SIGFPE, f);
  sig_catch(SIGBUS, f);
  sig_catch(SIGSEGV, f);
#ifdef SIGSYS
  sig_catch(SIGSYS, f);
#endif
#ifdef SIGEMT
  sig_catch(SIGEMT, f);
#endif
}

void (*sig_defaulthandler)(int) = SIG_DFL;

void sig_miscignore()
{
  sig_catch(SIGVTALRM, SIG_IGN);
  sig_catch(SIGPROF, SIG_IGN);
  sig_catch(SIGQUIT, SIG_IGN);
  sig_catch(SIGINT, SIG_IGN);
  sig_catch(SIGHUP, SIG_IGN);
#ifdef SIGXCPU
  sig_catch(SIGXCPU, SIG_IGN);
#endif
#ifdef SIGXFSZ
  sig_catch(SIGXFSZ, SIG_IGN);
#endif
}

void (*sig_ignorehandler)(int) = SIG_IGN;

int sig_cont = SIGCONT;