Date: Thu, 21 Jun 2012 03:40:32 GMT From: Shinji KOBAYASHI <skoba@moss.gr.jp> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/169282: utimes does not update st_mtim.tv_nsec when utimes(file, NULL) Message-ID: <201206210340.q5L3eWPn081664@red.freebsd.org> Resent-Message-ID: <201206210350.q5L3o9Dg088106@freefall.freebsd.org>
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>Number: 169282
>Category: kern
>Synopsis: utimes does not update st_mtim.tv_nsec when utimes(file, NULL)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jun 21 03:50:09 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Shinji KOBAYASHI
>Release: FreeBSD 9.0-STABLE
>Organization:
Ehime University
>Environment:
FreeBSD shuttle 9.0-STABLE FreeBSD 9.0-STABLE #28: Sat Jun 16 15:11:09 JST 2012 skoba@shuttle:/usr/obj/usr/src/sys/shuttle amd64
>Description:
man utimes 2 shows that utimes(file, NULL) updates file modified time to current time. But the sample code shows tv_mtim.tv_nsec equals 0, after utimes(file, NULL).
filetest.c
----
include <sys/time.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
int main(void) {
char *name;
struct stat filestatus;
int fd;
int second;
int nanosecond;
name = "t.log";
fd = creat(name, 0666);
fstat(fd, &filestatus);
second = filestatus.st_mtim.tv_sec;
nanosecond = filestatus.st_mtim.tv_nsec;
printf("File created time %d sec,%d nsec\n", second, nanosecond);
usleep(1000100);
utimes(name, NULL);
fstat(fd, &filestatus);
printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec);
usleep(1000100);
creat(name);
fstat(fd, &filestatus);
printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec);
return 0;
}
---
The result:
shuttle% ./filetest ~/src
File created time 1340243920 sec,662186384 nsec
File modified time 1340243921 sec, 0nsec
File modified time 1340243922 sec, 666190831nsec
>How-To-Repeat:
filetest.c
----
include <sys/time.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
int main(void) {
char *name;
struct stat filestatus;
int fd;
int second;
int nanosecond;
name = "t.log";
fd = creat(name, 0666);
fstat(fd, &filestatus);
second = filestatus.st_mtim.tv_sec;
nanosecond = filestatus.st_mtim.tv_nsec;
printf("File created time %d sec,%d nsec\n", second, nanosecond);
usleep(1000100);
utimes(name, NULL);
fstat(fd, &filestatus);
printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec);
usleep(1000100);
creat(name);
fstat(fd, &filestatus);
printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec);
return 0;
}
---
The result:
shuttle% cc -o filetest filetest.c
shuttle% ./filetest ~/src
File created time 1340243920 sec,662186384 nsec
File modified time 1340243921 sec, 0nsec
File modified time 1340243922 sec, 666190831nsec
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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