1 files changed, 100 insertions, 0 deletions
diff --git a/lib/util/sig2str.c b/lib/util/sig2str.c
new file mode 100644
index 0000000..11acc5e
--- /dev/null
+++ b/lib/util/sig2str.c
@@ -0,0 +1,100 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2012-2015, 2017-2020 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#ifndef HAVE_SIG2STR
+
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include <sudo_compat.h>
+#include <sudo_util.h>
+
+#if !defined(HAVE_SIGABBREV_NP)
+# if defined(HAVE_DECL_SYS_SIGNAME) && HAVE_DECL_SYS_SIGNAME == 1
+#   define sigabbrev_np(_x)	sys_signame[(_x)]
+# elif defined(HAVE_DECL__SYS_SIGNAME) && HAVE_DECL__SYS_SIGNAME == 1
+#   define sigabbrev_np(_x)	_sys_signame[(_x)]
+# elif defined(HAVE_SYS_SIGABBREV)
+#   define sigabbrev_np(_x)	sys_sigabbrev[(_x)]
+#  if defined(HAVE_DECL_SYS_SIGABBREV) && HAVE_DECL_SYS_SIGABBREV == 0
+    /* sys_sigabbrev is not declared by glibc */
+    extern const char *const sys_sigabbrev[NSIG];
+#  endif
+# else
+#   define sigabbrev_np(_x)	sudo_sys_signame[(_x)]
+    extern const char *const sudo_sys_signame[NSIG];
+# endif
+#endif /* !HAVE_SIGABBREV_NP */
+
+/*
+ * Translate signal number to name.
+ */
+int
+sudo_sig2str(int signo, char *signame)
+{
+#if defined(SIGRTMIN) && defined(SIGRTMAX)
+    /* Realtime signal support. */
+    if (signo >= SIGRTMIN && signo <= SIGRTMAX) {
+# ifdef _SC_RTSIG_MAX
+	const long rtmax = sysconf(_SC_RTSIG_MAX);
+# else
+	const long rtmax = SIGRTMAX - SIGRTMIN;
+# endif
+	if (rtmax > 0) {
+	    if (signo == SIGRTMIN) {
+		strlcpy(signame, "RTMIN", SIG2STR_MAX);
+	    } else if (signo == SIGRTMAX) {
+		strlcpy(signame, "RTMAX", SIG2STR_MAX);
+	    } else if (signo <= SIGRTMIN + (rtmax / 2) - 1) {
+		(void)snprintf(signame, SIG2STR_MAX, "RTMIN+%d",
+		    (signo - SIGRTMIN));
+	    } else {
+		(void)snprintf(signame, SIG2STR_MAX, "RTMAX-%d",
+		    (SIGRTMAX - signo));
+	    }
+	}
+	return 0;
+    }
+#endif
+    if (signo > 0 && signo < NSIG) {
+	const char *cp = sigabbrev_np(signo);
+	if (cp != NULL) {
+	    strlcpy(signame, cp, SIG2STR_MAX);
+	    /* Make sure we always return an upper case signame. */
+	    if (islower((unsigned char)signame[0])) {
+		size_t i;
+		for (i = 0; signame[i] != '\0'; i++)
+		    signame[i] = (char)toupper((unsigned char)signame[i]);
+	    }
+	    return 0;
+	}
+    }
+    errno = EINVAL;
+    return -1;
+}
+#endif /* HAVE_SIG2STR */