From d3cf3f08d1343d6b265516d5a79ce2d197b59d26 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sun, 4 Jan 2026 14:05:49 +0800
Subject: feat(file-system): implement read and write FAT32 File System and
 basic shell

---
 src/kernel/proc/proc.cc | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'src/kernel/proc/proc.cc')

diff --git a/src/kernel/proc/proc.cc b/src/kernel/proc/proc.cc
index 5db5f7a..6940a3e 100644
--- a/src/kernel/proc/proc.cc
+++ b/src/kernel/proc/proc.cc
@@ -152,7 +152,8 @@ void forkret()
     struct cpu *c = mycpu();
     c->runqueue->lock.release();
 
-    Drivers::uart_puts("[Proc] forkret: jumping to user.\n");
+    // Debug
+    // Drivers::uart_puts("[Proc] forkret: jumping to user.\n");
 
     // Enter user mode
     usertrapret();
@@ -185,6 +186,7 @@ static Proc *allocproc()
     p->state = USED;
     p->pid = nextpid++;
     p->priority = 0;
+    p->killed = 0;
     p->cpu = mycpu();
     p->cwd = nullptr;
     for (int i = 0; i < NOFILE; i++)
@@ -587,6 +589,34 @@ namespace ProcManager
         }
     }
 
+    int kill(int pid)
+    {
+        Proc* p;
+        proc_mem_lock.acquire();
+        for (p = proc_list_head; p != nullptr; p = p->all_next)
+        {
+            if (p->pid == pid)
+            {
+                p->killed = 1;
+
+                if (p->state == SLEEPING)
+                {
+                    p->state = RUNNABLE;
+
+                    struct cpu *c = mycpu();
+                    c->runqueue->lock.acquire();
+                    c->runqueue->enqueue(p);
+                    c->runqueue->lock.release();
+                }
+
+                proc_mem_lock.release();
+                return 0;
+            }
+        }
+        proc_mem_lock.release();
+        return -1;
+    }
+
     int growproc(int n)
     {
         uint64 sz;
-- 
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