Add build system scaffolding and libc headers

1 files changed, 33 insertions, 0 deletions

diff --git a/lib/libc/signal/sig2str.c b/lib/libc/signal/sig2str.c
new file mode 100644
index 00000000..209cb4c3
--- /dev/null
+++ b/lib/libc/signal/sig2str.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <string.h>
+#include <asm-generic/signal.h>
+#include <__signal.h>
+
+int sig2str(int signum, char *str)
+{
+	if (signum >= SIGHUP && signum <= SIGSYS) {
+		strcpy(str, __sys_signame[signum - SIGHUP]);
+		return 0;
+	}
+
+	if (signum == SIGRTMIN) {
+		strcpy(str, "SIGRTMIN");
+		return 0;
+	}
+
+	if (signum == SIGRTMAX) {
+		strcpy(str, "RTMAX");
+		return 0;
+	}
+
+	if (signum > SIGRTMIN && signum < SIGRTMAX) {
+		if (signum - SIGRTMIN <= SIGRTMAX - signum) {
+			sprintf(str, "RTMIN+%d", signum - SIGRTMIN);
+		} else {
+			sprintf(str, "RTMAX-%d", SIGRTMAX - signum);
+		}
+		return 0;
+	}
+
+	return -1;
+}