kill: Extract signal names into signames.h/signames.c

1 files changed, 95 insertions, 0 deletions

diff --git a/lib/signames.c b/lib/signames.c
new file mode 100644
index 000000000..2686cb156
--- /dev/null
+++ b/lib/signames.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 1988, 1993, 1994, 2017
+ *  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.
+ */
+/*
+ *  2017-10-14 Niklas Hambüchen <mail@nh2.me>
+ *  - Extracted signal names mapping from kill.c
+ *
+ * Copyright (C) 2014 Sami Kerola <kerolasa@iki.fi>
+ * Copyright (C) 2014 Karel Zak <kzak@redhat.com>
+ * Copyright (C) 2017 Niklas Hambüchen <mail@nh2.me>
+ */
+
+#include <ctype.h>		/* for isdigit() */
+#include <signames.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "c.h"
+#include "strutils.h"
+
+
+#ifdef SIGRTMIN
+static int rtsig_to_signum(char *sig)
+{
+	int num, maxi = 0;
+	char *ep = NULL;
+
+	if (strncasecmp(sig, "min+", 4) == 0)
+		sig += 4;
+	else if (strncasecmp(sig, "max-", 4) == 0) {
+		sig += 4;
+		maxi = 1;
+	}
+	if (!isdigit(*sig))
+		return -1;
+	errno = 0;
+	num = strtol(sig, &ep, 10);
+	if (!ep || sig == ep || errno || num < 0)
+		return -1;
+	num = maxi ? SIGRTMAX - num : SIGRTMIN + num;
+	if (num < SIGRTMIN || SIGRTMAX < num)
+		return -1;
+	return num;
+}
+#endif
+
+int signame_to_signum(char *sig)
+{
+	size_t n;
+
+	if (!strncasecmp(sig, "sig", 3))
+		sig += 3;
+#ifdef SIGRTMIN
+	/* RT signals */
+	if (!strncasecmp(sig, "rt", 2))
+		return rtsig_to_signum(sig + 2);
+#endif
+	/* Normal signals */
+	for (n = 0; n < ARRAY_SIZE(sys_signame); n++) {
+		if (!strcasecmp(sys_signame[n].name, sig))
+			return sys_signame[n].val;
+	}
+	return -1;
+}