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root/kernel/syscalls/setitimer.c

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DEFINITIONS

This source file includes following definitions.
  1. sys_setitimer

   1 /*
   2  * fiwix/kernel/syscalls/setitimer.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/time.h>
  10 
  11 #ifdef __DEBUG__
  12 #include <fiwix/stdio.h>
  13 #include <fiwix/process.h>
  14 #endif /*__DEBUG__ */
  15 
  16 int sys_setitimer(int which, const struct itimerval *new_value, struct itimerval *old_value)
  17 {
  18         int errno;
  19 
  20 #ifdef __DEBUG__
  21         printk("(pid %d) sys_setitimer(%d, 0x%08x, 0x%08x) -> \n", current->pid, which, (unsigned int)new_value, (unsigned int)old_value);
  22 #endif /*__DEBUG__ */
  23 
  24         if((unsigned int)old_value) {
  25                 if((errno = check_user_area(VERIFY_WRITE, old_value, sizeof(struct itimerval)))) {
  26                         return errno;
  27                 }
  28         }
  29 
  30         return setitimer(which, new_value, old_value);
  31 }

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