#include "fs.h"

#include "inode.h"

#include <sys/stat.h>

#include <minix/vfsif.h>

/*===========================================================================*

* fs_utime *

*===========================================================================*/

int fs_utime()

{

register struct inode *rip;

register int r;

/* Temporarily open the file. */

if( (rip = get_inode(fs_dev, fs_m_in.m_vfs_fs_utime.inode)) == NULL)

return(EINVAL);

/*

* Only the owner of a file or the super_user can change the timestamps.

* Here we assume VFS did that check before.

*/

r = OK;

if(read_only(rip) != OK) r = EROFS; /* not even su can touch if R/O */

if(r == OK) {

rip->i_update = CTIME; /* discard any stale ATIME and MTIME flags */

switch(fs_m_in.m_vfs_fs_utime.acnsec) {

case UTIME_NOW:

rip->i_update |= ATIME;

break;

case UTIME_OMIT: /* do not touch */

break;

default:

/*

* cases fs_m_in.m_vfs_fs_utime.acnsec < 0 || fs_m_in.m_vfs_fs_utime.acnsec >= 1E9

* are caught by VFS to cooperate with old instances of MFS

*/

rip->i_atime = fs_m_in.m_vfs_fs_utime.actime;

/*

* MFS does not support better than second resolution,

* so we discard ACNSEC to round down

*/

break;

}

switch(fs_m_in.m_vfs_fs_utime.modnsec) {

case UTIME_NOW:

rip->i_update |= MTIME;

break;

case UTIME_OMIT: /* do not touch */

break;

default:

/*

* cases fs_m_in.m_vfs_fs_utime.modnsec < 0 || fs_m_in.m_vfs_fs_utime.modnsec >= 1E9

* are caught by VFS to cooperate with old instances of MFS

*/

rip->i_mtime = fs_m_in.m_vfs_fs_utime.modtime;

/*

* MFS does not support better than second resolution,

* so we discard MODNSEC to round down

*/

break;

}

IN_MARKDIRTY(rip);

}

put_inode(rip);

return(r);

}