1 files changed, 27 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/signal/psignal.c b/libc-top-half/musl/src/signal/psignal.c
new file mode 100644
index 0000000..138dbe0
--- /dev/null
+++ b/libc-top-half/musl/src/signal/psignal.c
@@ -0,0 +1,27 @@
+#include "stdio_impl.h"
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+
+void psignal(int sig, const char *msg)
+{
+	FILE *f = stderr;
+	char *s = strsignal(sig);
+
+	FLOCK(f);
+
+	/* Save stderr's orientation and encoding rule, since psignal is not
+	 * permitted to change them. Save errno and restore it if there is no
+	 * error since fprintf might change it even on success but psignal is
+	 * not permitted to do so. */
+	void *old_locale = f->locale;
+	int old_mode = f->mode;
+	int old_errno = errno;
+
+	if (fprintf(f, "%s%s%s\n", msg?msg:"", msg?": ":"", s)>=0)
+		errno = old_errno;
+	f->mode = old_mode;
+	f->locale = old_locale;
+
+	FUNLOCK(f);
+}