minix/servers/vfs/time.c

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/* 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
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*/
#include "fs.h"
#include <minix/callnr.h>
#include <minix/com.h>
#include "file.h"
#include "fproc.h"
#include "param.h"
#include <minix/vfsif.h>
#include "vmnt.h"
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/*===========================================================================*
* do_utime *
*===========================================================================*/
PUBLIC int do_utime()
{
/* Perform the utime(name, timep) system call. */
register int len;
struct utime_req req;
struct lookup_req lookup_req;
struct node_details res;
int r;
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/* 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;
if (fetch_name(m_in.utime_file, len, M1) != OK) return(err_code);
/* Fill in lookup request fields */
lookup_req.path = user_fullpath;
lookup_req.lastc = NULL;
lookup_req.flags = EAT_PATH;
/* Request lookup */
if ((r = lookup(&lookup_req, &res)) != OK) return r;
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/* Fill in request fields.*/
if (m_in.utime_length == 0) {
req.actime = 0;
req.modtime = clock_time();
} else {
req.actime = m_in.utime_actime;
req.modtime = m_in.utime_modtime;
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}
req.fs_e = res.fs_e;
req.inode_nr = res.inode_nr;
req.uid = fp->fp_effuid;
req.gid = fp->fp_effgid;
/* Issue request */
return req_utime(&req);
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}
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/*===========================================================================*
* do_stime *
*===========================================================================*/
PUBLIC int do_stime()
{
struct vmnt *vmp;
/* Perform the stime(tp) system call. */
boottime = (long) m_in.pm_stime;
/* Send new time for all FS processes */
for (vmp = &vmnt[0]; vmp < &vmnt[NR_MNTS]; ++vmp) {
if (vmp->m_fs_e) req_stime(vmp->m_fs_e, boottime);
}
return OK;
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}