1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 8c33fdf..86fae41 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1,13 +1,20 @@
 #include <errno.h>
 #include <kernel/con.h>
 #include <kernel/sched.h>
+#include <signal.h>
 #include <stdint.h>
+#include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
 extern uint32_t ticks;
 
 int sys_puts(char *s) {
+  uint32_t sigs = 5;
+  printk("[kernel] Setting signals %01x for PID 0x%04x\n", sigs, ctask->pid);
+  ctask->signal |= sigs;
+
+  printk("[%04x] ", ctask->pid);
   return printk(s);
 }
 
@@ -27,6 +34,20 @@ void *sys_getpdir(void) {
   return (void*) pdir;
 }
 
+void *sys_signal(int sig, void (*func)(int)) {
+  if(sig < 0 || sig >= NRSIG)
+    return NULL;
+
+  /* SIGKILL and SIGSTOP cannot be caught */
+  if(sig == SIGKILL || sig == SIGSTOP)
+    return NULL;
+
+  printk("Task %x registered new signal handler 0x%08x for signal %01x\n", ctask->pid, (uint32_t) func, sig);
+  ctask->sig_handlers[sig] = func;
+
+  return func;
+}
+
 int sys_dummy(void) {
   return -ENOSYS;
 }