| Commit message (Collapse) | Author | Age | Files | Lines |
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Newer 'struct utmp' is using 'struct timeval' to represent login and logout
times, so include the maximum accuracy to textual utmp format. Notice that
this change does not remove support of converting earlier textual formats
back to binary. But conversions from binary to former format will no longer
be available.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Converting a time structure from text format that has timezone markup is
practically impossible. See reference links for more information. This
leads to situation where multiple utmpdump(1) conversions from binary to
text and back make timestamps to shift amount of timezone offset to UTC-0.
The easiest way to make multiple conversions to work without timeshifts is
to always use UTC-0 timezone. Downside of this approach is that the textual
format is less human readable than local timestamps would be.
Reference: http://www.catb.org/esr/time-programming/#_strptime_3_and_getdate_3
Reference: http://man7.org/linux/man-pages/man3/strptime.3.html
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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The message "stat failed %s" seems to say that stat() failed to
do something, or failed to pass a test, but of course it means
that the statting of something failed. So say so. Also make
two very similar messages equal to this one.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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This adds a concise description of a tool to its usage text.
A first form of this patch was proposed by Steven Honeyman
(see http://www.spinics.net/lists/util-linux-ng/msg09994.html).
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
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If current TZ has no representation of a given time_t then localtime()
would return NULL and break the next strftime().
In practice this happens very likely on systems with 64bit time_t when
parsing broken binary data. Seen on aarch64 (and probably s390) using
our (incompatible) test wtmp data.
Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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(unless bug[s]) This change is backwards compatibile. Earlier binary to
text dumps can be converted back to binary, or otherway around.
The only thing that will not work are IPv6 addresses that possible
earlier conversion had broke. Such conversions resulted with random IPv4
in place of IPv6 address in text format, and original information is gone
forever.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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In include/bits/utmp.h the ut_user and ut_time macros are marked with
comment they are backwards compatibility hacks. It is probably best to
avoid use of these macros where ever possible.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Done to reduce translation project work.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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- don't support --follow for stdin at all
- inotify based implementation closes the file, so don't close it in
main() again
Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Co-Author: Karel Zak <kzak@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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[utmpdump.c:82]: (style) The function 'unspace' is never used
[utmpdump.c:131]: (style) The scope of the variable 't' can be reduced
[utmpdump.c:167]: (warning) scanf without field width limits can crash with huge input data
[kzak@redhat.com: - don't use scanf field width limits for integers]
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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Signed-off-by: Bernhard Voelker <mail@bernhard-voelker.de>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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