signal.h

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#include "sys/types.h"


#ifndef __SIGNAL
#define __SIGNAL

typedef unsigned long sigset_t;
typedef void (*__sighandler_t) (int);


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

struct sigaction {
        __sighandler_t sa_handler;
        sigset_t sa_mask;
        int sa_flags;
        void (*sa_restorer)(void);
};


#define SIGHUP           1
#define SIGINT           2
#define SIGQUIT          3
#define SIGILL           4
#define SIGTRAP          5
#define SIGABRT          6
#define SIGIOT           6
#define SIGBUS           7
#define SIGFPE           8
#define SIGKILL          9
#define SIGUSR1         10
#define SIGSEGV         11
#define SIGUSR2         12
#define SIGPIPE         13
#define SIGALRM         14
#define SIGTERM         15
#define SIGSTKFLT       16
#define SIGCHLD         17
#define SIGCONT         18
#define SIGSTOP         19
#define SIGTSTP         20
#define SIGTTIN         21
#define SIGTTOU         22
#define SIGMAX          23              // Numero de señales


#define SIG_ERR         ((void (*)(int)) -1)
#define SIG_DFL         ((void (*)(int))  0)
#define SIG_IGN         ((void (*)(int))  1)
#define SIG_HOLD        ((void (*)(int))  2)

int sigprocmask(int flag, const sigset_t *set, sigset_t *old_set);

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

#define sigemptyset(set)                (*set=0)
#define sigfillset(set)                 ( (*set=0xffffffff) ? 0 : -1)
#define sigaddset(set, signo)   ( (signo<SIGMAX) ? ( *set |= (1<<signo))==0 : -1  )
#define sigdelset(set, signo)   ( (signo<SIGMAX) ? ( *set&=(~(1<<signo)))&0  : (unsigned long) -1)
#define sigismember(set, signo) ( (signo<SIGMAX) ? ((*set>>signo)&1) : -1  )


int sigaction (int signo, struct sigaction *act, struct sigaction *oact);

#endif

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