更新shell切换机制

apps/shell/shell.c

@@ -63,8 +63,6 @@ int main(){
 
         argc = cmd_parse(com, argv, ' ');
 
-
-
         if (argc == -1) {
             printf("[Shell]: Error: out of arguments buffer\n");
             continue;
@@ -72,23 +70,13 @@ int main(){
 
         if (!strcmp("version", argv[0])){
             print_info();
+        }if (!strcmp("system", argv[0])){
+            exit(0);
         }else if (!strcmp("help", argv[0]) || !strcmp("?", argv[0]) || !strcmp("h", argv[0])) {
             printf("-=[CoolPotShell Helper]=-\n");
             printf("help ? h              Print shell help info.\n");
             printf("version               Print os version.\n");
-            printf("type       <name>     Read a file.\n");
+            printf("system                Launch system shell.\n");
-            printf("ls                    List all files.\n");
-            printf("mkdir      <name>     Make a directory.\n");
-            printf("del rm     <name>     Delete a file.\n");
-            printf("sysinfo               Print system info.\n");
-            printf("proc [kill<pid>|list] List all running processes.\n");
-            printf("reset                 Reset OS.\n");
-            printf("shutdown exit         Shutdown OS.\n");
-            printf("debug                 Print os debug info.\n");
-            printf("disk[list|<ID>|cg<ID>]List or view disks.\n");
-            printf("cd  <path>            Change shell top directory.\n");
-            printf("sb3       <name>      Player a wav sound file.\n");
-            printf("exec <path>           Execute a application.\n");
         } else printf("\033ff3030;[Shell]: Unknown command '%s'.\033c6c6c6;\n", argv[0]);
     }
 }

src/kernel/kernel.c

@@ -43,8 +43,6 @@ void shutdown_kernel(){
     kill_all_task();
     clock_sleep(10);
     power_off();
-
-
 }
 
 uint32_t memory_all(){
@@ -53,6 +51,15 @@ uint32_t memory_all(){
 
 int check_task(int *pid){
     struct task_struct *shell = found_task_pid(*pid);
+
+    if(shell == NULL){
+        printf("\n[Task-Check]: Task was throw exception.\n");
+        printf("Enter any key to restart kernel.> ");
+        getc();
+        printf("\n");
+        reset_kernel();
+    }
+
     while (1){
         if(shell->state == TASK_DEATH){
             printf("\n[Task-Check]: Task was throw exception.\n");
@@ -65,6 +72,18 @@ int check_task(int *pid){
     return 0;
 }
 
+int check_task_usershell(int *pid){
+    struct task_struct *shell = found_task_pid(*pid);
+    while (1){
+        if(shell->state == TASK_DEATH){
+            screen_clear();
+            int pid = kernel_thread(setup_shell,NULL,"CPOS-Shell");
+            kernel_thread(check_task,&pid,"CPOS-CK");
+        }
+    }
+    return 0;
+}
+
 void kernel_main(multiboot_t *multiboot) {
 
     io_cli();
@@ -141,7 +160,22 @@ void kernel_main(multiboot_t *multiboot) {
     clock_sleep(25);
 
     vfs_change_path("apps");
-    klogf(user_process("shell.bin","Shell") != -1,"Shell process init.\n");
+    int pid = user_process("shell.bin","Shell");
+    klogf(pid != -1,"Shell process init.\n");
+    if(pid == -1){
+        printf("UserShell launch fault.\n");
+        printf("Launching system shell...\n");
+
+        int pid = kernel_thread(setup_shell,NULL,"CPOS-Shell");
+        klogf(pid != -1,"Launch kernel shell.\n");
+        kernel_thread(check_task,&pid,"CPOS-CK");
+        goto ker;
+    }
+
+    kernel_thread(check_task_usershell,&pid,"CPOS-UCK");
+
+    ker:
+
     //klogf(user_process("init.bin","Init") != -1,"Init base process init.\n");
 
     //int pid = kernel_thread(setup_shell,NULL,"CPOS-Shell");

src/kernel/syscall.c

@@ -29,7 +29,7 @@ static char syscall_getch(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,ui
 
 static void syscall_exit(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
     task_kill(get_current()->pid);
-    printf("PID[%d] exit code: %d",get_current()->pid,ebx);
+    //printf("PID[%d] exit code: %d",get_current()->pid,ebx);
 }
 
 static void* syscall_malloc(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){