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Re: how to access and display apps that I've launched
- From: "Ian Lambert via cygwin" <cygwin at cygwin dot com>
- To: <cygwin at cygwin dot com>, <Brian dot Inglis at SystematicSw dot ab dot ca>
- Date: Tue, 25 Jul 2017 21:48:01 +0000 (UTC)
- Subject: Re: how to access and display apps that I've launched
- Authentication-results: sourceware.org; auth=none
- References: <1036849022.821922.1501019281615.ref@mail.yahoo.com>
- Reply-to: Ian Lambert <ian dot lambert_42 at yahoo dot com>
- Reply-to: Ian Lambert <ian dot lambert_42 at yahoo dot com>
--------------------------------------------
On Tue, 7/25/17, Brian Inglis <> wrote:
Subject: Re: how to access and display apps that I've launched
To: cygwin
Date: Tuesday, July 25, 2017, 3:57 PM
On 2017-07-25 12:16, Achim Gratz
wrote:
> Brian Inglis writes:
>> rebaselst uses touch -t 7001010000 ...
- could be patched to 197001010000.
>
> Could be, but touch is specified to assume
"19" yhen YY=70 by POSIX, AFAIK.
>
>> Is this affected
by locale and by Windows regional date settings in
Control
>> Panel/Region/Formats
tab/Additional settings... button/Date tab/Calendar
>> group/When a two-digit year is
entered, interpret it as a year between
>> |(nnnn-99)| and [nnnn ^v] with the
default values |1980| and [2079 ^v] i.e. from
>> the start of the DOS epoch which
postdates the Unix epoch 19700101, and could
>> cause 70 to be interpreted as 2070.
>
> That would be
surprising since the expectation really is UNIX epoch
when
> we're talking about Cygwin.
In any case, the OP should easily be able
> to test this at the shell prompt.
I know POSIX says and my tests
on current releases verify 1969-99, 2000-68, but
could this be thrown off by localization
interfering in some cases, as was
/proc/loadavg, because a function started using
locales?
These files and related functions
do not seem candidates to be affected by the
recent patch for ls problems with symlinks, so
BLODA blocking pre-1980 times?
= = =
There is a change to "invalid argument"
somewhere from 1980 to 1979,
but it also involves permissions.
Permission denied comes from the chmod 444 in /bin/rebaselst
I think. Otherwise with write permission touch gives invalid argument.
Either way, it changes the files to current date-time,
not an earlier time, when it fails.
$ for f in * ; do echo $f ; touch -t 198001010000 $f ; done
fullrebase.done
rebase_all
rebase_dyn
rebase_exe
rebase_lst
rebase_pkg
rebase_user
rebase_user_exe
$ for f in * ; do echo $f ; touch -t 197901010000 $f ; done
fullrebase.done
touch: setting times of 'fullrebase.done': Invalid argument
rebase_all
touch: setting times of 'rebase_all': Invalid argument
rebase_dyn
touch: cannot touch 'rebase_dyn': Permission denied
rebase_exe
touch: cannot touch 'rebase_exe': Permission denied
rebase_lst
touch: cannot touch 'rebase_lst': Permission denied
rebase_pkg
touch: cannot touch 'rebase_pkg': Permission denied
rebase_user
touch: cannot touch 'rebase_user': Permission denied
rebase_user_exe
touch: cannot touch 'rebase_user_exe': Permission denied
The "bad" part of strace of a file with write permission is:
3524 fhandler_base::utimens_fs: incoming lastaccess 0x10EDB8D0 0x0
86 285905 [main] touch 3524 seterrno_from_nt_status: /home/corinna/src/cygwin/cygwin-2.8.2/cygwin-2.8.2-1.x86_64/src/newlib-cygwin/winsup/cygwin/fhandler_disk_file.cc:1385 status 0xC000000D -> windows error 87
30 285935 [main] touch 3524 geterrno_from_win_error: windows error 87 == errno 22
22 285957 [main] touch 3524 futimens: -1 = futimens(0, 0xFFFFC950)
22 285979 [main] touch 3524 close: close(0)
23 286002 [main] touch 3524 fhandler_base::close: closing '/var/cache/rebase/rebase_all' handle 0x240
178 286180 [main] touch 3524 close: 0 = close(0)
touch 558 286738 [main] touch 3524 write: 5 = write(2, 0xFFFFCC50, 5)
: 47 286785 [main] touch 3524 write: 1 = write(2, 0x180229941, 1)
45 286830 [main] touch 3524 write: 1 = write(2, 0x180229935, 1)
setting times of 116 286946 [main] touch 3524 write: 17 = write(2, 0x100414923, 17)
'rebase_all' 38 286984 [main] touch 3524 write: 12 = write(2, 0x10041C080, 12)
: 106 287090 [main] touch 3524 write: 2 = write(2, 0x180229945, 2)
Invalid argument 41 287131 [main] touch 3524 write: 16 = write(2, 0x180229C60, 16)
189 287320 [main] touch 3524 write: 1 = write(2, 0x1801FC9A7, 1)
184 287504 [main] touch 3524 close: close(1)
18 287522 [main] touch 3524 fhandler_base::close: closing '' handle 0x204
17 287539 [main] touch 3524 close: 0 = close(1)
211 287750 [main] touch 3524 close: close(2)
19 287769 [main] touch 3524 fhandler_base::close: closing '' handle 0x200
24 287793 [main] touch 3524 close: 0 = close(2)
177 287970 [main] touch 3524 do_exit: do_exit (256), exit_state 1
25 287995 [main] touch 3524 void: 0x0 = signal (20, 0x1)
19 288014 [main] touch 3524 void: 0x0 = signal (1, 0x1)
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