#include <signal.h>
#include "sig.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)(int))
{ 
  sig_catch(SIGALRM,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)(int))
{ 
  sig_catch(SIGCHLD,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)(int)) 
{ 
  sig_catch(SIGHUP,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)(int)) 
{ 
  sig_catch(SIGTERM,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)() = SIG_IGN;

int sig_cont = SIGCONT;