Import sources from 2011-03-30 iso image

1 files changed, 60 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/kill.c b/sys/src/ape/lib/ap/plan9/kill.c
new file mode 100755
index 000000000..95bbbdcc7
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/kill.c
@@ -0,0 +1,60 @@
+#include "lib.h"
+#include <fcntl.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+static int
+note(int pid, char *msg, char *fmt)
+{
+	int f;
+	char pname[50];
+
+	sprintf(pname, fmt, pid);
+	f = open(pname, O_WRONLY);
+	if(f < 0){
+		errno = ESRCH;
+		return -1;
+	}
+	if(msg != 0 && write(f, msg, strlen(msg)) < 0){
+		close(f);
+		errno = EPERM;
+		return -1;
+	}
+	close(f);
+	return 0;
+}
+
+int
+kill(pid_t pid, int sig)
+{
+	char *msg;
+	int sid, r, mpid;
+
+	if(sig == 0)
+		msg = 0;
+	else {
+		msg = _sigstring(sig);
+		if(msg == 0) {
+			errno = EINVAL;
+			return -1;
+		} 
+	}
+
+	if(pid < 0) {
+		sid = getpgrp();
+		mpid = getpid();
+		if(setpgid(mpid, -pid) == 0) {
+			r = note(mpid, msg, "/proc/%d/notepg");
+			setpgid(mpid, sid);
+		} else {
+			r = -1;
+		}
+	} else if(pid == 0)
+		r = note(getpid(), msg, "/proc/%d/notepg");
+	else
+		r = note(pid, msg, "/proc/%d/note");
+	return r;
+}