2009/8/13 Corinna Vinschen:
> I just tried that on W7 and W7 64. I can't reproduce any specific
> slowness starting with he second invocation of rxvt, incuding writing
> the utmp entry. The startup time is always the same, roughly a second,
> regardless of the number of already open rxvt windows.
I tried it again briefly last night. It only happened when logged in
as an administrator, not as a limited user. That's with UAC enabled.
Didn't try disabling. Reproduced both with 'rxvt' and 'mintty -u', and
timed the delay to about 15 seconds.
Trying to investigate further now, I can no longer reproduce it.
That's without having changed anything, knowingly anyway. Gah.
This is on:
CYGWIN_NT-6.1-WOW64 Tobermory 1.7.0(0.212/5/3) 2009-08-11 11:07 i686 Cygwin
And here's the mintty code that (sometimes) triggers the problem:
ut.ut_type = USER_PROCESS;
ut.ut_pid = pid;
ut.ut_time = time(0);
char *dev = ptsname(fd);
if (dev) {
if (strncmp(dev, "/dev/", 5) == 0)
dev += 5;
strncpy(ut.ut_line, dev ?: "?", sizeof ut.ut_line);
if (strncmp(dev, "pty", 3) == 0 || strncmp(dev, "tty", 3) == 0)
dev += 3;
strncpy(ut.ut_id, dev ?: "?", sizeof ut.ut_id);
}
strncpy(ut.ut_user, (pw ? pw->pw_name : 0) ?: "?", sizeof ut.ut_user);
login(&ut);
Must be the login() that does it. My uneducated guess is that it's
some sort of file access timeout regarding /var/run/utmp.
A couple of other things I noticed. When starting 'rxvt' or 'mintty
-u' as a limited user, no utmp entry is created, which seems to be due
to /var/run/utmp being owned by an administrator ("Fish"):
$ ls -l /var/run/utmp
-rw-r--r-- 1 Fish root 3080 Aug 13 19:56 /var/run/utmp
After deleting that file and touching it from the limited user account
("Andy"), both were able to create utmp entries:
$ w
20:17:08 up 43 min, 3 users, load average: 0.00, 0.00, 0.00
USER TTY LOGIN@ IDLE JCPU PCPU WHAT
Fish tty5 20:11 986days 0.00s 0.09s -bash
Fish tty6 20:11 986days 0.00s 0.21s -bash
Andy tty4 20:11 986days 0.00s 0.07s -bash
And of course I haven't been logged in for three years, so I guess the
IDLE field isn't implemented?
Andy
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