minix/servers/fs/time.c
Jorrit Herder 322ec9ef8b Moved stime, time, times POSIX calls from FS to PM. Removed child time
accounting from kernel (now in PM).  Large amount of files in this commit
is due to system time problems during development.
2005-05-31 09:50:51 +00:00

69 lines
1.9 KiB
C

/* This file takes care of those system calls that deal with time.
*
* The entry points into this file are
* do_utime: perform the UTIME system call
* do_stime: PM informs FS about STIME system call
*/
#include "fs.h"
#include <minix/callnr.h>
#include <minix/com.h>
#include "file.h"
#include "fproc.h"
#include "inode.h"
#include "param.h"
/*===========================================================================*
* do_utime *
*===========================================================================*/
PUBLIC int do_utime()
{
/* Perform the utime(name, timep) system call. */
register struct inode *rip;
register int len, r;
/* Adjust for case of 'timep' being NULL;
* utime_strlen then holds the actual size: strlen(name)+1.
*/
len = m_in.utime_length;
if (len == 0) len = m_in.utime_strlen;
/* Temporarily open the file. */
if (fetch_name(m_in.utime_file, len, M1) != OK) return(err_code);
if ( (rip = eat_path(user_path)) == NIL_INODE) return(err_code);
/* Only the owner of a file or the super_user can change its time. */
r = OK;
if (rip->i_uid != fp->fp_effuid && !super_user) r = EPERM;
if (m_in.utime_length == 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 (m_in.utime_length == 0) {
rip->i_atime = clock_time();
rip->i_mtime = rip->i_atime;
} else {
rip->i_atime = m_in.utime_actime;
rip->i_mtime = m_in.utime_modtime;
}
rip->i_update = CTIME; /* discard any stale ATIME and MTIME flags */
rip->i_dirt = DIRTY;
}
put_inode(rip);
return(r);
}
/*===========================================================================*
* do_stime *
*===========================================================================*/
PUBLIC int do_stime()
{
/* Perform the stime(tp) system call. */
boottime = (long) m_in.pm_stime;
return(OK);
}