Handle process arguments

kernel/syscall/processctl.c

@@ -8,11 +8,12 @@
 #include "vfs/vfs.h"
 #include "path/path.h"
 #include "kprintf.h"
+#include "dlmalloc/malloc.h"
 
 #define PCTL_MP_MAX 0xff
 #define PCTL_PATH_MAX VFS_PATH_MAX
 
-int32_t SYSCALL3(sys_processctl, pid1, cmd1, arg1) {
+int32_t SYSCALL5(sys_processctl, pid1, cmd1, arg1, arg2, arg3) {
   uint64_t pid = pid1;
   uint64_t cmd = cmd1;
   int32_t ret = E_OK;
@@ -58,6 +59,13 @@ int32_t SYSCALL3(sys_processctl, pid1, cmd1, arg1) {
         ret = E_NOMEMORY;
         goto done;
       }
+
+      size_t argslen = arg3;
+      char **args = (char **)arg2;
+      for (size_t i = 0; i < argslen; i++) {
+        PROC_ARG(newproc, args[i]);
+      }
+
       proc_register(newproc);
       ret = newproc->pid;
     } break;
@@ -70,6 +78,32 @@ int32_t SYSCALL3(sys_processctl, pid1, cmd1, arg1) {
     case PCTL_GETPID: {
       ret = proc->pid;
     } break;
+    case PCTL_ARGLEN: {
+      ret = proc->procargs.len;
+    } break;
+    case PCTL_ARGV: {
+      char **argbuf = (char **)arg1;
+      if (argbuf == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+      size_t len = arg2;
+      ProcArg *arg = proc->procargs.list;
+      size_t i = 0;
+      while (arg) {
+        if (i == len) {
+          break;
+        }
+        if (argbuf[i] == NULL) {
+          ret = E_INVALIDARGUMENT;
+          goto done;
+        }
+        hal_strcpy(argbuf[i], arg->string);
+        arg = arg->next;
+        i++;
+      }
+      ret = E_OK;
+    } break;
     default: {
       ret = E_INVALIDARGUMENT;
     } break;

kernel/syscall/processctl.h

@@ -4,6 +4,6 @@
 #include <stdint.h>
 #include "syscall.h"
 
-int32_t SYSCALL3(sys_processctl, pid1, cmd1, arg1);
+int32_t SYSCALL5(sys_processctl, pid1, cmd1, arg1, arg2, arg3);
 
 #endif // SYSCALL_PROCESSCTL_H_