1 files changed, 35 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/misc/getrusage.c b/libc-top-half/musl/src/misc/getrusage.c
new file mode 100644
index 0000000..8e03e2e
--- /dev/null
+++ b/libc-top-half/musl/src/misc/getrusage.c
@@ -0,0 +1,35 @@
+#include <sys/resource.h>
+#include <string.h>
+#include <errno.h>
+#include "syscall.h"
+
+int getrusage(int who, struct rusage *ru)
+{
+	int r;
+#ifdef SYS_getrusage_time64
+	long long kru64[18];
+	r = __syscall(SYS_getrusage_time64, who, kru64);
+	if (!r) {
+		ru->ru_utime = (struct timeval)
+			{ .tv_sec = kru64[0], .tv_usec = kru64[1] };
+		ru->ru_stime = (struct timeval)
+			{ .tv_sec = kru64[2], .tv_usec = kru64[3] };
+		char *slots = (char *)&ru->ru_maxrss;
+		for (int i=0; i<14; i++)
+			*(long *)(slots + i*sizeof(long)) = kru64[4+i];
+	}
+	if (SYS_getrusage_time64 == SYS_getrusage || r != -ENOSYS)
+		return __syscall_ret(r);
+#endif
+	char *dest = (char *)&ru->ru_maxrss - 4*sizeof(long);
+	r = __syscall(SYS_getrusage, who, dest);
+	if (!r && sizeof(time_t) > sizeof(long)) {
+		long kru[4];
+		memcpy(kru, dest, 4*sizeof(long));
+		ru->ru_utime = (struct timeval)
+			{ .tv_sec = kru[0], .tv_usec = kru[1] };
+		ru->ru_stime = (struct timeval)
+			{ .tv_sec = kru[2], .tv_usec = kru[3] };
+	}
+	return __syscall_ret(r);
+}