70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Copyright (c) 1985, 1989 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)signal.c 5.5 (Berkeley) 6/1/90";
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#endif /* LIBC_SCCS and not lint */
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/*
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* Almost backwards compatible signal.
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*/
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#define _KERNEL
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#include "ixemul.h"
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sig_t
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signal(int s, sig_t a)
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{
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struct sigaction sa, osa;
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sa.sa_handler = a;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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sa.sa_flags |= SA_RESTART;
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if (syscall (SYS_sigaction, s, &sa, &osa) < 0)
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return (BADSIG);
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return (osa.sa_handler);
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}
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#ifdef NATIVE_MORPHOS
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sig_t
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_trampoline_signal(void)
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{
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int *p = (int *)REG_A7;
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int s = p[1];
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sig_t a = (sig_t)p[2];
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if (a != SIG_DFL && a != SIG_IGN && a != SIG_ERR)
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a = (sig_t)((int)a ^ 1);
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a = signal(s, a);
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if (a != SIG_DFL && a != SIG_IGN && a != SIG_ERR)
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a = (sig_t)((int)a ^ 1);
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return a;
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}
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struct EmulLibEntry _gate_signal = {
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TRAP_LIB, 0, (void(*)())_trampoline_signal
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};
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#endif
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