root/kernel/syscalls/sigsuspend.c

/* */

DEFINITIONS

1. sys_sigsuspend

   1 /*
   2  * fiwix/kernel/syscalls/sigsuspend.c
   3  *
   4  * Copyright 2018, Jordi Sanfeliu. All rights reserved.
   5  * Distributed under the terms of the Fiwix License.
   6  */
   7 
   8 #include <fiwix/fs.h>
   9 #include <fiwix/syscalls.h>
  10 #include <fiwix/signal.h>
  11 #include <fiwix/process.h>
  12 #include <fiwix/errno.h>
  13 
  14 #ifdef __DEBUG__
  15 #include <fiwix/stdio.h>
  16 #endif /*__DEBUG__ */
  17 
  18 int sys_sigsuspend(__sigset_t *mask)
  19 {
  20         __sigset_t old_mask;
  21         int errno;
  22 
  23 #ifdef __DEBUG__
  24         printk("(pid %d) sys_sigsuspend(0x%08x) -> ", current->pid, mask);
  25 #endif /*__DEBUG__ */
  26 
  27         old_mask = current->sigblocked;
  28         if(mask) {
  29                 if((errno = check_user_area(VERIFY_READ, mask, sizeof(__sigset_t)))) {
  30                         return errno;
  31                 }
  32                 current->sigblocked = (int)*mask & SIG_BLOCKABLE;
  33         } else {
  34                 current->sigblocked = 0 & SIG_BLOCKABLE;
  35         }
  36         sys_pause();
  37         current->sigblocked = old_mask;
  38 
  39 #ifdef __DEBUG__
  40         printk("-EINTR\n");
  41 #endif /*__DEBUG__ */
  42 
  43         return -EINTR;
  44 }

/* */