root/kernel/syscalls/fchdir.c

/* */

DEFINITIONS

1. sys_fchdir

   1 /*
   2  * fiwix/kernel/syscalls/fchdir.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/process.h>
  10 #include <fiwix/stat.h>
  11 #include <fiwix/errno.h>
  12 
  13 #ifdef __DEBUG__
  14 #include <fiwix/stdio.h>
  15 #endif /*__DEBUG__ */
  16 
  17 int sys_fchdir(unsigned int ufd)
  18 {
  19         struct inode *i;
  20 
  21 #ifdef __DEBUG__
  22         printk("(pid %d) sys_fchdir(%d)\n", current->pid, ufd);
  23 #endif /*__DEBUG__ */
  24 
  25         CHECK_UFD(ufd);
  26         i = fd_table[current->fd[ufd]].inode;
  27         if(!S_ISDIR(i->i_mode)) {
  28                 return -ENOTDIR;
  29         }
  30         iput(current->pwd);
  31         current->pwd = i;
  32         current->pwd->count++;
  33         return 0;
  34 }

/* */