Add a strsignal(3) (like strerror(3)) for libc compatability with other

systems. NetBSD, Linux, SVR4 etc all have it.

2 files changed, 75 insertions, 2 deletions

diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc
index 42c8c39..2defef1 100644
--- a/lib/libc/string/Makefile.inc
+++ b/lib/libc/string/Makefile.inc
@@ -1,5 +1,5 @@
 #	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
-#	$Id: Makefile.inc,v 1.14 1998/02/20 08:23:55 jb Exp $
+#	$Id: Makefile.inc,v 1.15 1999/01/19 23:45:48 jdp Exp $
 
 .PATH: ${.CURDIR}/../libc/${MACHINE_ARCH}/string ${.CURDIR}/../libc/string
 
@@ -10,7 +10,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c ffs.c index.c memccpy.c memchr.c memcmp.c \
 	memcpy.c memmove.c memset.c rindex.c strcasecmp.c strcat.c strchr.c \
 	strcmp.c strcoll.c strcpy.c strcspn.c strdup.c strerror.c strlen.c \
 	strmode.c strncat.c strncmp.c strncpy.c strpbrk.c strrchr.c strsep.c \
-	strspn.c strstr.c strtok.c strxfrm.c swab.c
+	strsignal.c strspn.c strstr.c strtok.c strxfrm.c swab.c
 
 # machine-dependent string sources
 .include "${.CURDIR}/../libc/${MACHINE_ARCH}/string/Makefile.inc"
@@ -27,5 +27,6 @@ MLINKS+=strcat.3 strncat.3
 MLINKS+=strcmp.3 strncmp.3
 MLINKS+=strcpy.3 strncpy.3
 MLINKS+=strerror.3 perror.3 strerror.3 sys_errlist.3 strerror.3 sys_nerr.3
+MLINKS+=psignal.3 strsignal.3 psignal.3 sys_siglist.3 psignal.3 sys_signame.3
 MLINKS+=strtok.3 strtok_r.3
 .endif
diff --git a/lib/libc/string/strsignal.c b/lib/libc/string/strsignal.c
new file mode 100644
index 0000000..5ec6365
--- /dev/null
+++ b/lib/libc/string/strsignal.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strerror.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+
+char *
+strsignal(num)
+	int num;
+{
+#define	UPREFIX	"Unknown signal: "
+	static char ebuf[40] = UPREFIX;		/* 64-bit number + slop */
+	register unsigned int signum;
+	register char *p, *t;
+	char tmp[40];
+
+	signum = num;				/* convert to unsigned */
+	if (signum < sys_nsig)
+		return ((char *)sys_siglist[signum]);
+
+	/* Do this by hand, so we don't link to stdio(3). */
+	t = tmp;
+	if (num < 0)
+		signum = -signum;
+	do {
+		*t++ = "0123456789"[signum % 10];
+	} while (signum /= 10);
+	if (num < 0)
+		*t++ = '-';
+	for (p = ebuf + sizeof(UPREFIX) - 1;;) {
+		*p++ = *--t;
+		if (t <= tmp)
+			break;
+	}
+	*p = '\0';
+	return (ebuf);
+}