Am Fr, den 29.07.2005 schrieb Berna Massingill um 21:53: > >> > > hwclock --show | cat > >> > > > >> > > Does that help? > > It did for me (newly-installed FC4 system on Dell Dimension, > hwclock from util-linux-2.12p-9.5). > > I notice also that: > > (*) hwclock produces output if run from one of the virtual text > consoles, but not if run from an xterm (unless piped to another > command, as you describe above). > > (*) /sbin/hwclock does not produce output, but if I copy /sbin/hwclock > to, say, /root/hwclock, /root/hwclock produces output. > > (*) If run as /sbin/hwclock, strace output indicates that the program > makes a call to ioctl, which works in a text console but not in an > xterm. If run as /root/hwclock, it doesn't make that call, and all > is well. Interesting. Maybe one of the SELinux gurus is willing to jump in an enlighten us mortals. > >> > No change. Why do you think it would? > > I'm interested in the explanation as well -- why piping the output > to another command makes a difference. A colleague also says "ask > him whether he found this by accident or whether he knew it would > work because of some deep understanding ...." So -- ? Fair question. I "know" it from https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=150153 > >> http://fedora.redhat.com/docs/release-notes/fc4/errata/#sn-overview > >> > >> hwclock is in the list of daemons covered by the targeted policy. This > >> means hwclock may or may not have control over the terminal. > > Would I be right in guessing that this explains why putting the > executable in a different directory changes the results?? > > >> Though it > >> seems this issue is a different one (on the German speaking Fedora list > >> the cat pipe helped recently[1]). > >> > >> Alexander > >> > >> [1] > >> https://www.redhat.com/archives/fedora-de-list/2005-June/msg00109.html > > If only I read German! Should have been just a reference, as the thread too shows a strace output. > -- blm Alexander -- Alexander Dalloz | Enger, Germany | GPG http://pgp.mit.edu 0xB366A773 legal statement: http://www.uni-x.org/legal.html Fedora Core 2 GNU/Linux on Athlon with kernel 2.6.11-1.35_FC2smp Serendipity 23:36:56 up 14 days, 4:09, load average: 0.12, 0.15, 0.17
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