Wrong times written by mkisofs?
Bob Johnson
bob89 at bobj.org
Sat Jan 19 19:31:50 PST 2008
On Saturday 19 January 2008 05:22:58 pm you wrote:
> > Irecently built a CD of images to give to a friend. I noticed the
> > timestamps displayed when I list the CD contents are five hours earlier
> > than they should be. Five hours matches my GMT offset. This is a
> > dual-boot system with Win XP, so the hardware clock is set to local time.
> >
> > E.g. a file on my hard drive has a correct timestamp
> > -rw------- 1 bobo bobo 2246671 Jan 19 12:22 IMG_0660_080115_2348.JPG
> >
> > while the same file on the resulting CD looks like
> > -rw------- 1 bobo bobo 2246671 Jan 19 07:22 IMG_0660_080115_2348.JPG
> >
> > The "date" command returns the correct local time.
> >
> > Did I do something incorrectly, or is this a bug in mkisofs? It appears
> > to me that mkisofs decided to correct for GMT offset when it shouldn't
> > have.
> >
>
> Let me asume you use a _recent_ mkisofs and set up a correct timezone...
>
[...]
>
> What do you get from "mkisofs -version"?
mkisofs 2.01 (i386-unknown-freebsd6.2)
> What timezone do you have (how many hours from GMT and which location)?
U.S. Eastern Standard Time (EST = GMT-5)
> What do you have in the TZ= variable?
It seems to be empty.
> What do you see with "TZ=GMT ls -l ToJoe"?
# TZ=GMT ls -l /mnt
total 62113
-rw------- 1 bobj bobj 2246671 Jan 19 12:22 IMG_0660_080115_2348.JPG
-rw------- 1 bobj bobj 3346787 Jan 19 12:22 IMG_0661_080116_0524.JPG
-rw------- 1 bobj bobj 3623969 Jan 19 12:22 IMG_0662_080116_0525.JPG
-rw------- 1 bobj bobj 3966310 Jan 19 12:22 IMG_0663_080116_0526.JPG
-rw------- 1 bobj bobj 3971338 Jan 19 12:22 IMG_0664_080116_0526.JPG
-rw------- 1 bobj bobj 3946837 Jan 19 12:22 IMG_0665_080116_0528.JPG
-rw------- 1 bobj bobj 3873753 Jan 19 12:22 IMG_0666_080116_0528.JPG
-rw------- 1 bobj bobj 3832501 Jan 19 12:22 IMG_0667_080116_0529.JPG
-rw------- 1 bobj bobj 3854064 Jan 19 12:22 IMG_0668_080116_0531.JPG
-rw------- 1 bobj bobj 3849156 Jan 19 12:22 IMG_0669_080116_0532.JPG
-rw------- 1 bobj bobj 3868314 Jan 19 12:23 IMG_0670_080116_0533.JPG
-rw------- 1 bobj bobj 3901654 Jan 19 12:23 IMG_0671_080116_0534.JPG
-rw------- 1 bobj bobj 3851665 Jan 19 12:23 IMG_0672_080116_0537.JPG
-rw------- 1 bobj bobj 3850832 Jan 19 12:23 IMG_0673_080116_0538.JPG
-rw------- 1 bobj bobj 3876448 Jan 19 12:23 IMG_0674_080116_0542.JPG
-rw------- 1 bobj bobj 3866105 Jan 19 12:23 IMG_0675_080116_0543.JPG
-rw------- 1 bobj bobj 3881576 Jan 19 12:23 IMG_0676_080116_0543.JPG
These times are the correct LOCAL time, not GMT. The following are five hours
off:
# TZ=EST ls -l /mnt
total 62113
-rw------- 1 bobj bobj 2246671 Jan 19 07:22 IMG_0660_080115_2348.JPG
-rw------- 1 bobj bobj 3346787 Jan 19 07:22 IMG_0661_080116_0524.JPG
-rw------- 1 bobj bobj 3623969 Jan 19 07:22 IMG_0662_080116_0525.JPG
-rw------- 1 bobj bobj 3966310 Jan 19 07:22 IMG_0663_080116_0526.JPG
-rw------- 1 bobj bobj 3971338 Jan 19 07:22 IMG_0664_080116_0526.JPG
-rw------- 1 bobj bobj 3946837 Jan 19 07:22 IMG_0665_080116_0528.JPG
-rw------- 1 bobj bobj 3873753 Jan 19 07:22 IMG_0666_080116_0528.JPG
-rw------- 1 bobj bobj 3832501 Jan 19 07:22 IMG_0667_080116_0529.JPG
-rw------- 1 bobj bobj 3854064 Jan 19 07:22 IMG_0668_080116_0531.JPG
-rw------- 1 bobj bobj 3849156 Jan 19 07:22 IMG_0669_080116_0532.JPG
-rw------- 1 bobj bobj 3868314 Jan 19 07:23 IMG_0670_080116_0533.JPG
-rw------- 1 bobj bobj 3901654 Jan 19 07:23 IMG_0671_080116_0534.JPG
-rw------- 1 bobj bobj 3851665 Jan 19 07:23 IMG_0672_080116_0537.JPG
-rw------- 1 bobj bobj 3850832 Jan 19 07:23 IMG_0673_080116_0538.JPG
-rw------- 1 bobj bobj 3876448 Jan 19 07:23 IMG_0674_080116_0542.JPG
-rw------- 1 bobj bobj 3866105 Jan 19 07:23 IMG_0675_080116_0543.JPG
-rw------- 1 bobj bobj 3881576 Jan 19 07:23 IMG_0676_080116_0543.JPG
I thought this system had been updated recently, but:
# uname -a
FreeBSD sniffles.bobj.org 6.2-RELEASE-p4 FreeBSD 6.2-RELEASE-p4 #0: Thu Apr 26
17:40:53 UTC 2007
root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
so for my next trick, I will at least get it up to the lastest binary patch
level, and try again.
- Bob
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