Add a "fork" of musl as //fusl.

fusl/src/misc/getrlimit.c

Index: fusl/src/misc/getrlimit.c
diff --git a/fusl/src/misc/getrlimit.c b/fusl/src/misc/getrlimit.c
new file mode 100644
index 0000000000000000000000000000000000000000..b073677f1a77a7a6062813cba43da1c44528798e
--- /dev/null
+++ b/fusl/src/misc/getrlimit.c
@@ -0,0 +1,27 @@
+#include <sys/resource.h>
+#include <errno.h>
+#include "syscall.h"
+#include "libc.h"
+
+#define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
+
+int getrlimit(int resource, struct rlimit *rlim)
+{
+	unsigned long k_rlim[2];
+	int ret = syscall(SYS_prlimit64, 0, resource, 0, rlim);
+	if (!ret) {
+		FIX(rlim->rlim_cur);
+		FIX(rlim->rlim_max);
+	}
+	if (!ret || errno != ENOSYS)
+		return ret;
+	if (syscall(SYS_getrlimit, resource, k_rlim) < 0)
+		return -1;
+	rlim->rlim_cur = k_rlim[0] == -1UL ? RLIM_INFINITY : k_rlim[0];
+	rlim->rlim_max = k_rlim[1] == -1UL ? RLIM_INFINITY : k_rlim[1];
+	FIX(rlim->rlim_cur);
+	FIX(rlim->rlim_max);
+	return 0;
+}
+
+LFS64(getrlimit);