Import sources from 2011-03-30 iso image

1 files changed, 23 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/getppid.c b/sys/src/ape/lib/ap/plan9/getppid.c
new file mode 100755
index 000000000..01759221b
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/getppid.c
@@ -0,0 +1,23 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include "sys9.h"
+
+pid_t
+getppid(void)
+{
+	int n, f;
+	char ppidbuf[15];
+
+	f = open("#c/ppid", 0);
+	n = read(f, ppidbuf, sizeof ppidbuf);
+	if(n < 0)
+		errno = EINVAL;
+	else
+		n = atoi(ppidbuf);
+	close(f);
+	return n;
+}