?? signal.c
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#include <string.h>#include <signal.h>/* Global variable */sigset_t _sigintr; /* Set by siginterrupt. */__sighandler_t__signal (int sig, __sighandler_t handler, int flags){ int ret; struct sigaction action, oaction; memset(&action, 0, sizeof(struct sigaction)); action.sa_handler = handler; action.sa_flags = flags; ret = sigaction (sig, &action, &oaction); return (ret == -1) ? SIG_ERR : oaction.sa_handler;}__sighandler_tsignal (int sig, __sighandler_t handler){ return __signal(sig, handler, (SA_ONESHOT | SA_NOMASK | SA_INTERRUPT) & ~SA_RESTART);}
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