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       _sigaction.c - scc - simple c99 compiler
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       ---
       _sigaction.c (485B)
       ---
            1 #include <string.h>
            2 
            3 #include <arch/sigaction.h>
            4 #include <sys.h>
            5 
            6 extern void _sigreturn(void);
            7 
            8 int _sigaction(int sig, struct sigaction *sa, struct sigaction *old)
            9 {
           10         struct sigaction ksa, *p = NULL;
           11 
           12         if (sa) {
           13                 ksa.sa_handler = sa->sa_handler;
           14                 ksa.sa_flags = sa->sa_flags | SA_RESTORER;
           15                 ksa.sa_restorer = _sigreturn;
           16                 memcpy(&ksa.sa_mask, &sa->sa_mask, sizeof(ksa.sa_mask));
           17                 p = &ksa;
           18         }
           19 
           20         if (__sigaction(sig, p, old, sizeof(ksa.sa_mask)) < 0)
           21                 return -1;
           22 
           23         return 0;
           24 }