minimal plan9port to cross-build Jehanne

lib/lib9/wait.c

@@ -0,0 +1,53 @@
+#include <u.h>
+#include <libc.h>
+
+static Waitmsg*
+_wait(int n, char *buf)
+{
+	int l;
+	char *fld[5];
+	Waitmsg *w;
+
+	if(n <= 0)
+		return nil;
+	buf[n] = '\0';
+	if(tokenize(buf, fld, nelem(fld)) != nelem(fld)){
+		werrstr("couldn't parse wait message");
+		return nil;
+	}
+	l = strlen(fld[4])+1;
+	w = malloc(sizeof(Waitmsg)+l);
+	if(w == nil)
+		return nil;
+	w->pid = atoi(fld[0]);
+	w->time[0] = atoi(fld[1]);
+	w->time[1] = atoi(fld[2]);
+	w->time[2] = atoi(fld[3]);
+	w->msg = (char*)&w[1];
+	memmove(w->msg, fld[4], l);
+	return w;
+}
+
+Waitmsg*
+wait(void)
+{
+	char buf[256];
+
+	return _wait(await(buf, sizeof buf-1), buf);
+}
+
+Waitmsg*
+waitnohang(void)
+{
+	char buf[256];
+
+	return _wait(awaitnohang(buf, sizeof buf-1), buf);
+}
+
+Waitmsg*
+waitfor(int pid)
+{
+	char buf[256];
+
+	return _wait(awaitfor(pid, buf, sizeof buf-1), buf);
+}