LibCore: Add wrapper for signal()

1 files changed, 13 insertions, 0 deletions

diff --git a/Userland/Libraries/LibCore/System.cpp b/Userland/Libraries/LibCore/System.cpp
index 4ebecf6a16..c572f56367 100644
--- a/Userland/Libraries/LibCore/System.cpp
+++ b/Userland/Libraries/LibCore/System.cpp
@@ -8,6 +8,7 @@
 #include <AK/String.h>
 #include <LibCore/System.h>
 #include <LibSystem/syscall.h>
+#include <cstring>
 #include <fcntl.h>
 #include <stdarg.h>
 #include <sys/ioctl.h>
@@ -115,6 +116,18 @@ ErrorOr<void> sigaction(int signal, struct sigaction const* action, struct sigac
     return {};
 }
 
+#ifdef __APPLE__
+ErrorOr<sig_t> signal(int signal, sig_t handler)
+#else
+ErrorOr<sighandler_t> signal(int signal, sighandler_t handler)
+#endif
+{
+    auto old_handler = ::signal(signal, handler);
+    if (old_handler == SIG_ERR)
+        return Error::from_syscall("signal"sv, -errno);
+    return old_handler;
+}
+
 ErrorOr<struct stat> fstat(int fd)
 {
     struct stat st = {};