From 3c62c32ca502a9a68b312814ed807bbe254d136d Mon Sep 17 00:00:00 2001
From: Matthias Kruk <m@m10k.eu>
Date: Sat, 23 Nov 2019 15:45:24 +0900
Subject: [PATCH] Make use of fork() and execfve() to spawn STDIO and NET
 daemons

---
 kernel/core/main.c  | 45 ++++++++++++++++++++++++++++++++++++++++-----
 kernel/core/net.c   |  4 ++++
 kernel/core/stdio.c |  3 +++
 3 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/kernel/core/main.c b/kernel/core/main.c
index 8ef8527..45dbb3d 100644
--- a/kernel/core/main.c
+++ b/kernel/core/main.c
@@ -23,6 +23,8 @@
 #include <arch.h>
 #include <process.h>
 #include <sys/socket.h>
+#include <crxstd.h>
+#include <unistd.h>
 
 void cpu_debug(void);
 int arch_init(void*);
@@ -97,8 +99,7 @@ static void _idle(void)
 
 static void _init(void)
 {
-	process_t *stdio;
-	process_t *net;
+	pid_t pid;
 	int err;
 
 	/*
@@ -107,6 +108,39 @@ static void _init(void)
 	 * operation, and restart them in case they should die.
 	 */
 
+	pid = fork();
+
+	if(!pid) {
+		/* this is the child */
+		err = execfve(_stdio, NULL, NULL);
+
+		if(err < 0) {
+			/* FIXME: Print an error message */
+
+			for(;;);
+		}
+	} else if(pid < 0) {
+		/* FIXME: Print an error message */
+		for(;;);
+	}
+
+	pid = fork();
+
+	if(!pid) {
+		/* this is the child */
+		err = execfve(_net, NULL, NULL);
+
+		if(err < 0) {
+			/* FIXME: Print an error message */
+			for(;;);
+		}
+	} else if(pid < 0) {
+		/* FIXME: Print an error message */
+		for(;;);
+	}
+
+#if 0
+
 	err = process_create(&stdio, PID_STDIO, 3, (void*)_stdio);
 
 	if(err < 0) {
@@ -119,8 +153,9 @@ static void _init(void)
 		dbg_printf("Failed to start NET process [err=0x%08x]\n", err);
 	}
 
-	/* For now, only start them once */
-	_idle();
+#endif /* 0 */
+
+	wait(NULL);
 
 	return;
 }
@@ -207,7 +242,7 @@ int corax(void *mb_info, u32_t magic)
 		PANIC("Could not spawn idle process\n");
 	}
 
-	err = process_create(&proc, PID_ANY, 0, (void*)_init);
+	err = process_create(&proc, PID_ANY, 3, (void*)_init);
 
 	if(err < 0) {
 		PANIC("Could not spawn init process\n");
diff --git a/kernel/core/net.c b/kernel/core/net.c
index bbcb3f4..3510057 100644
--- a/kernel/core/net.c
+++ b/kernel/core/net.c
@@ -2,6 +2,8 @@
 #include <crxstd.h>
 #include <corax/errno.h>
 
+extern int wait(int*);
+
 void _net(void)
 {
 	struct cxmsg msg;
@@ -10,6 +12,8 @@ void _net(void)
 	while(1) {
 		len = cxrecv(PID_ANY, &msg);
 
+		len = 0;
+
 		if(len > 0) {
 			/* FIXME: handle message */
 
diff --git a/kernel/core/stdio.c b/kernel/core/stdio.c
index fce868d..4af8b34 100644
--- a/kernel/core/stdio.c
+++ b/kernel/core/stdio.c
@@ -2,6 +2,8 @@
 #include <crxstd.h>
 #include <corax/errno.h>
 
+extern int wait(int*);
+
 void _stdio(void)
 {
 	struct cxmsg msg;
@@ -9,6 +11,7 @@ void _stdio(void)
 
 	while(1) {
 		err = cxrecv(PID_ANY, &msg);
+		err = 0;
 
 		if(err > 0) {
 			/* FIXME: Handle message */
-- 
2.47.3