From 3619c820f8ff5918cf122a031bde6305d32f6528 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 10 Jan 2021 13:19:50 +0100
Subject: Started procfs

---
 kernel/features/fs.c   |  8 +++-----
 kernel/features/proc.c | 38 ++++++++++++++++++++++++++++++++++++++
 kernel/inc/proc.h      |  3 ++-
 3 files changed, 43 insertions(+), 6 deletions(-)

(limited to 'kernel')

diff --git a/kernel/features/fs.c b/kernel/features/fs.c
index 14e6a9c..ab2e236 100644
--- a/kernel/features/fs.c
+++ b/kernel/features/fs.c
@@ -185,14 +185,12 @@ void device_install(void)
 {
 	devices = list_new();
 
-	struct vfs *vfs;
-	struct device *dev;
-
-	vfs = malloc(sizeof(*vfs));
+	struct vfs *vfs = malloc(sizeof(*vfs));
 	vfs->type = VFS_DEVFS;
 	vfs->read = devfs_read;
-	dev = malloc(sizeof(*dev));
+	struct device *dev = malloc(sizeof(*dev));
 	dev->name = "dev";
+	dev->type = DEV_CHAR;
 	dev->vfs = vfs;
 	device_add(dev);
 	vfs_mount(dev, "/dev/");
diff --git a/kernel/features/proc.c b/kernel/features/proc.c
index 93e97f1..499be81 100644
--- a/kernel/features/proc.c
+++ b/kernel/features/proc.c
@@ -3,6 +3,7 @@
 #include <assert.h>
 #include <boot.h>
 #include <cpu.h>
+#include <fs.h>
 #include <interrupts.h>
 #include <list.h>
 #include <load.h>
@@ -129,6 +130,7 @@ struct proc *proc_make(void)
 {
 	struct proc *proc = malloc(sizeof(*proc));
 	proc->pid = current_pid++;
+	proc->messages = list_new();
 	proc->state = PROC_RUNNING;
 
 	if (current)
@@ -137,6 +139,31 @@ struct proc *proc_make(void)
 	return proc;
 }
 
+u32 procfs_read(const char *path, void *buf, u32 offset, u32 count, struct device *dev)
+{
+	while (*path == '/')
+		path++;
+
+	int pid = 0;
+	while (path[0] >= '0' && path[0] <= '9') {
+		pid = pid * 10 + (path[0] - '0');
+		path++;
+	}
+
+	if (pid) {
+		struct proc *p = proc_from_pid(pid);
+		if (!p)
+			return 0;
+
+		if (!memcmp(path, "/status", 8)) {
+			printf("STATUS!\n");
+		}
+	}
+
+	printf("%s - off: %d, cnt: %d, buf: %x, dev %x\n", path, offset, count, buf, dev);
+	return count;
+}
+
 extern void proc_jump_userspace(void);
 
 u32 _esp, _eip;
@@ -149,6 +176,17 @@ void proc_init(void)
 	scheduler_enable();
 	proc_list = list_new();
 
+	// Procfs
+	struct vfs *vfs = malloc(sizeof(*vfs));
+	vfs->type = VFS_PROCFS;
+	vfs->read = procfs_read;
+	struct device *dev = malloc(sizeof(*dev));
+	dev->name = "proc";
+	dev->type = DEV_CHAR;
+	dev->vfs = vfs;
+	device_add(dev);
+	vfs_mount(dev, "/proc/");
+
 	kernel_proc = proc_make();
 
 	struct node *new = list_add(proc_list, proc_make());
diff --git a/kernel/inc/proc.h b/kernel/inc/proc.h
index c8fb3e2..7a479be 100644
--- a/kernel/inc/proc.h
+++ b/kernel/inc/proc.h
@@ -8,7 +8,7 @@
 #include <list.h>
 #include <sys.h>
 
-#define PROC_QUANTUM 100 // Milliseconds or something // TODO
+#define PROC_QUANTUM 42 // Milliseconds or something // TODO
 
 #define EFLAGS_ALWAYS 0x2 // Always one
 #define EFLAGS_INTERRUPTS 0x200 // Enable interrupts
@@ -24,6 +24,7 @@ struct proc {
 	struct regs regs;
 	struct regs regs_backup;
 	enum proc_state state;
+	struct list *messages;
 };
 
 struct proc *kernel_proc;
-- 
cgit v1.2.3