minix/servers/mfs/time.c
2006-12-22 11:54:42 +00:00

55 lines
1.3 KiB
C

#include "fs.h"
#include <minix/callnr.h>
#include <minix/com.h>
#include "inode.h"
#include <minix/vfsif.h>
/*===========================================================================*
* fs_utime *
*===========================================================================*/
PUBLIC int fs_utime()
{
register struct inode *rip;
register int r;
caller_uid = fs_m_in.REQ_UID;
caller_gid = fs_m_in.REQ_GID;
/* Temporarily open the file. */
if ( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE) {
printf("MFS(%d) get_inode by fs_utime() failed\n", SELF_E);
return(EINVAL);
}
/* Only the owner of a file or the super_user can change its time. */
r = OK;
if (rip->i_uid != caller_uid && caller_uid != SU_UID) r = EPERM;
if (fs_m_in.REQ_ACTIME == 0 && r != OK) r = forbidden(rip, W_BIT);
if (read_only(rip) != OK) r = EROFS; /* not even su can touch if R/O */
if (r == OK) {
if (fs_m_in.REQ_ACTIME == 0) {
rip->i_atime = fs_m_in.REQ_MODTIME;
rip->i_mtime = rip->i_atime;
} else {
rip->i_atime = fs_m_in.REQ_ACTIME;
rip->i_mtime = fs_m_in.REQ_MODTIME;
}
rip->i_update = CTIME; /* discard any stale ATIME and MTIME flags */
rip->i_dirt = DIRTY;
}
put_inode(rip);
return(r);
}
PUBLIC int fs_stime()
{
boottime = fs_m_in.REQ_BOOTTIME;
return OK;
}