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#ifndef SIGNAL_H
#define SIGNAL_H
#include <sys/types.h>
#define SIGHUP 0
#define SIGINT 1
#define SIGWINCH 2
#define SIGQUIT 3
#define SIG_IGN 4
#define SIGSEGV 5
#define SIGTERM 15
typedef int sigset_t;
union sigval {
int sival_int; // Integer signal value.
void *sival_ptr; // Pointer signal value.
};
struct siginfo {
int si_signo; // Signal number.
int si_code; // Signal code.
int si_errno; // If non-zero, an errno value associated with
// this signal, as described in <errno.h>.
pid_t si_pid; // Sending process ID.
uid_t si_uid; // Real user ID of sending process.
void *si_addr; // Address of faulting instruction.
int si_status; // Exit value or signal.
long si_band; // Band event for SIGPOLL.
union sigval si_value; // Signal value.
};
typedef struct siginfo siginfo_t;
int kill(pid_t pid, int sig);
struct sigaction {
void (*sa_handler)(int); // Pointer to a signal-catching function or one of
// the macros SIG_IGN or SIG_DFL.
sigset_t sa_mask; // Additional set of signals to be blocked during execution
// of signal-catching function.
int sa_flags; // Special flags to affect behavior of signal.
void (*sa_sigaction)(int, siginfo_t *,
void *); // Pointer to a signal-catching function.
};
int sigaction(int sig, const struct sigaction *act, struct sigaction *oact);
#endif // SIGNAL_H
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