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#include "signal_handler.h"
#include <errno.h>
namespace ov4
{
void signal_init()
{
/* Install the signal handlers */
sigemptyset(&block_job);
sigemptyset(&block_sig_TTOU);
sigemptyset(&block_io);
sigaddset(&block_job, SIGINT);
sigaddset(&block_job, SIGTSTP);
sigaddset(&block_job, SIGCHLD);
sigaddset(&block_sig_TTOU, SIGTTOU);
sigaddset(&block_io, SIGTTOU);
sigaddset(&block_io, SIGTTIN);
Signal(SIGINT, sigint_handler); /* ctrl-c */
Signal(SIGTSTP, sigtstp_handler); /* ctrl-z */
Signal(SIGCHLD, sigchld_handler); /* Terminated or stopped child */
/* This one provides a clean way to kill the shell */
Signal(SIGQUIT, sigquit_handler);
}
/*
* Signal - wrapper for the sigaction function
*/
handler_t *Signal([[maybe_unused]] int signum, handler_t *handler)
{
struct sigaction action, old_action;
action.sa_handler = handler;
sigemptyset(&action.sa_mask); /* block sigs of type being handled */
action.sa_flags = SA_RESTART; /* restart syscalls if possible */
if (sigaction(signum, &action, &old_action) < 0)
unix_error("Signal error");
return (old_action.sa_handler);
}
int block_all(sigset_t *prev)
{
sigset_t set;
sigfillset(&set);
return sigprocmask(SIG_SETMASK, &set, prev);
}
int block_handler(sigset_t *prev)
{
return sigprocmask(SIG_BLOCK, &block_job, prev);
}
}
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