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signal.c,v
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1989-06-15
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97 lines
head 1.3;
branch ;
access ;
symbols ;
locks ; strict;
comment @ * @;
1.3
date 89.06.15.14.52.43; author ouster; state Exp;
branches ;
next 1.2;
1.2
date 88.07.28.17.48.03; author ouster; state Exp;
branches ;
next 1.1;
1.1
date 88.07.02.16.49.42; author ouster; state Exp;
branches ;
next ;
desc
@@
1.3
log
@Make signal handlers return void instead of int.
@
text
@/*
* Copyright (c) 1985 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@@(#)signal.c 5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint
/*
* Almost backwards compatible signal.
*/
#include <signal.h>
void (*
signal(s, a))()
int s;
void (*a)();
{
struct sigvec osv, sv;
static int mask[NSIG];
static int flags[NSIG];
sv.sv_handler = a;
sv.sv_mask = mask[s];
sv.sv_flags = flags[s];
if (sigvec(s, &sv, &osv) < 0)
return (BADSIG);
if (sv.sv_mask != osv.sv_mask || sv.sv_flags != osv.sv_flags) {
mask[s] = sv.sv_mask = osv.sv_mask;
flags[s] = sv.sv_flags = osv.sv_flags;
if (sigvec(s, &sv, (struct sigvec *) 0) < 0)
return (BADSIG);
}
return (osv.sv_handler);
}
@
1.2
log
@Lint.
@
text
@d16 1
a16 1
int (*
d18 2
a19 1
int s, (*a)();
@
1.1
log
@Initial revision
@
text
@d32 1
a32 1
if (sigvec(s, &sv, 0) < 0)
@