1 files changed, 47 insertions, 0 deletions
diff --git a/src/backend/port/getrusage.c b/src/backend/port/getrusage.c
new file mode 100644
index 00000000000..a560d4afa3f
--- /dev/null
+++ b/src/backend/port/getrusage.c
@@ -0,0 +1,47 @@
+#include <math.h>               /* for pow() prototype */
+
+#include <errno.h>
+#include "rusagestub.h"
+#include "port-protos.h"
+
+int
+getrusage(int who, struct rusage * rusage)
+{
+	struct tms	tms;
+	register int tick_rate = CLK_TCK;	/* ticks per second */
+	clock_t		u,
+				s;
+
+	if (rusage == (struct rusage *) NULL)
+	{
+		errno = EFAULT;
+		return (-1);
+	}
+	if (times(&tms) < 0)
+	{
+		/* errno set by times */
+		return (-1);
+	}
+	switch (who)
+	{
+		case RUSAGE_SELF:
+			u = tms.tms_utime;
+			s = tms.tms_stime;
+			break;
+		case RUSAGE_CHILDREN:
+			u = tms.tms_cutime;
+			s = tms.tms_cstime;
+			break;
+		default:
+			errno = EINVAL;
+			return (-1);
+	}
+#define TICK_TO_SEC(T, RATE)	((T)/(RATE))
+#define TICK_TO_USEC(T,RATE)	(((T)%(RATE)*1000000)/RATE)
+	rusage->ru_utime.tv_sec = TICK_TO_SEC(u, tick_rate);
+	rusage->ru_utime.tv_usec = TICK_TO_USEC(u, tick_rate);
+	rusage->ru_stime.tv_sec = TICK_TO_SEC(s, tick_rate);
+	rusage->ru_stime.tv_usec = TICK_TO_USEC(u, tick_rate);
+	return (0);
+}
+