Changeset 23 for trunk/kernel/syscalls/sys_signal.c

Timestamp:

Jun 18, 2017, 10:06:41 PM (7 years ago)

Author:

alain

Message:

Introduce syscalls.

File:

• trunk/kernel/syscalls/sys_signal.c (modified) (2 diffs)

trunk/kernel/syscalls/sys_signal.c

@@ -1 +1 @@
 /*
- * sys_sem.c: interface to access signal service
+ * sys_signal.c - associate a specific signal handler to a given signal.
  * 
- * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
- * Copyright (c) 2011,2012,2013,2014,2015 UPMC Sorbonne Universites
+ * Authors   Ghassan Almaless (2008,2009,2010,2011,2012)
+ *           Alain Greiner (2016,2017)
+ *
+ * Copyright (c) UPMC Sorbonne Universites
  *
  * This file is part of ALMOS-kernel.
@@ -21 +23 @@
  */
 
-#include <types.h>
+#include <hal_types.h>
 #include <errno.h>
 #include <thread.h>
-#include <task.h>
-#include <pid.h>
+#include <printk.h>
 #include <signal.h>
 
+//////////////////////////////////
+int sys_signal( uint32_t   sig_id,
+                void     * handler )
+{  
+        thread_t  * this = CURRENT_THREAD;
 
-int sys_signal(uint_t sig, sa_handler_t *handler)
-{  
-        register struct thread_s *this;
-        int retval;
-
-        this = current_thread;
-
-        if((sig == 0) || (sig >= SIG_NR) || (sig == SIGKILL) || (sig == SIGSTOP))
+        if((sig_id == 0) || (sig_id >= SIG_NR) || (sig_id == SIGKILL) || (sig_id == SIGSTOP))
         {
-                this->info.errno = EINVAL;
-                return SIG_ERROR;
+        printk("\n[ERROR] in %s : illega signal index = %d\n", __FUNCTION__ , sig_id );
+                this->errno = EINVAL;
+                return -1;
         }
 
-        retval = (int) this->task->sig_mgr.sigactions[sig];
-        this->task->sig_mgr.sigactions[sig] = handler;
+        // register handler in signal manager for the calling process
+        this->process->sig_mgr.sigactions[sig_id] = handler;
 
-        sig_dmsg(1, "%s: handler @%x has been registred for signal %d\n",
-               __FUNCTION__, 
-               handler, 
-               sig);
+        signal_dmsg("\n[INFO] %s : handler @%x has been registred for signal %d\n",
+                    __FUNCTION__ , handler , sig_id );
 
-        return retval;
-}
-
-
-int sys_sigreturn_setup(void *sigreturn_func)
-{
-        struct thread_s *this;
-
-        this = current_thread;
-        this->info.attr.sigreturn_func = sigreturn_func;
-        cpu_context_set_sigreturn(&this->pws, sigreturn_func);
         return 0;
 }
 
-
-int sys_kill(pid_t pid, uint_t sig)
-{
-        cid_t   location;
-        error_t err;
-
-        if((sig == 0) || (sig >= SIG_NR))
-        {
-                err = EINVAL;
-        }
-        else
-        {
-                if ( PID_GET_CLUSTER(pid) == current_cid )
-                        location = current_cid;
-                else
-                        location = task_whereis(pid);
-
-                err = signal_rise(pid, location, sig);
-
-                /* No error, return 0 */
-                if (!err)
-                        return 0;
-        }
-
-        /* Error. Set errno and return */
-        current_thread->info.errno = err;
-        return -1;
-}