Cygwin starts take long since march. Three minutes to prompt.

[Brian Inglis]

On 2023-04-03 10:10, Thomas Schweikle via Cygwin wrote:
> 
> 
> Am Mo., 03.Apr..2023 um 17:48:03 schrieb Brian Inglis via Cygwin:
>> On 2023-04-03 08:59, Thomas Schweikle via Cygwin wrote:
>>> Am Mo., 03.Apr..2023 um 16:47:42 schrieb Eliot Moss:
>>>> On 4/3/2023 10:38 AM, Thomas Schweikle via Cygwin wrote:
>>>>> Cygwin shell takes about three minutes until the prompt is shown. Any idea 
>>>>> how to find out the cause?
>>
>>>> I think the most common thing in the past had to do with
>>>> probing remote mounts.  You could try pruning paths and
>>>> see what happens, or adjusting mount parameters.
>>
>>> Mounts are:
>>> $ cat /proc/mounts
>>> C:/cygwin/bin /usr/bin ntfs binary,auto 1 1
>>> C:/cygwin/lib /usr/lib ntfs binary,auto 1 1
>>> C:/cygwin / ntfs binary,auto 1 1
>>> C: /cygdrive/c ntfs binary,posix=0,user,noumount,auto 1 1
>>> G: /cygdrive/g netapp binary,posix=0,user,noumount,auto 1 1
>>> L: /cygdrive/l netapp binary,posix=0,user,noumount,auto 1 1
>>> M: /cygdrive/m netapp binary,posix=0,user,noumount,auto 1 1
>>> O: /cygdrive/o netapp binary,posix=0,user,noumount,auto 1 1
>>> P: /cygdrive/p netapp binary,posix=0,user,noumount,auto 1 1
>>> T: /cygdrive/t netapp binary,posix=0,user,noumount,auto 1 1
>>> V: /cygdrive/v netapp binary,posix=0,user,noumount,auto 1 1
>>> W: /cygdrive/w netapp binary,posix=0,user,noumount,auto 1 1
>>> X: /cygdrive/x netapp binary,posix=0,user,noumount,auto 1 1
>>> Y: /cygdrive/y netapp binary,posix=0,user,noumount,auto 1 1
>>> Z: /cygdrive/z netapp binary,posix=0,user,noumount,auto 1 1
>>
>>> I've read somewhere noacl should be given for these mounts. Could not find 
>>> it, even with a fresh installed cygwin on a fresh windows.
>>
>>> Trying to reset acls to defaults for "C:\cygwin" gives lots of "access 
>>> denied" errors, even if running as "Administrator" from an elevated shell. 
>>> Tried both "cmd.exe" and "powershell.exe". Both did not allow to change acls.
>>
>>> Seems as if "C:\cygwin" has lost ownership an some acls. Any idea to get them 
>>> back in place for the whole tree?
>>
>> Should not need anything special:
>>
>> $ ls -dl / && getfacl / && icacls `cygpath -m /`    # sanitized:
>> drwxr-xr-x 1 $USER None 0 Mar 16 18:57 /
>>
>> # file: /
>> # owner: $USER
>> # group: None
>> user::rwx
>> group::r-x
>> other::r-x
>> default:user::rwx
>> default:group::r-x
>> default:other::r-x
>>
>> C:/.../cygwin64 $HOSTNAME/$USER:(F)
>>                  $HOSTNAME/None:(RX)
>>                  Everyone:(RX)
>>                  CREATOR OWNER:(OI)(CI)(IO)(F)
>>                  CREATOR GROUP:(OI)(CI)(IO)(RX)
>>                  Everyone:(OI)(CI)(IO)(RX)
>>
>> Successfully processed 1 files; Failed processing 0 files
> 
> $ ls -dl / && getfacl / && icacls `cygpath -m /`
> drwxr-xr-x 1 SYSTEM SYSTEM 0 Mar 23 13:44 /
> # file: /
> # owner: SYSTEM
> # group: SYSTEM
> user::rwx
> group::r-x
> other::r-x
> default:user::rwx
> default:group::r-x
> default:other::r-x
> 
> C:/cygwin NT-AUTORITÄT\SYSTEM:(F)
>            NT-AUTORITÄT\SYSTEM:(RX)
>            Jeder:(RX)
>            ERSTELLER-BESITZER:(OI)(CI)(IO)(F)
>            ERSTELLERGRUPPE:(OI)(CI)(IO)(RX)
>            Jeder:(OI)(CI)(IO)(RX)
> 
> 1 Dateien erfolgreich verarbeitet, bei 0 Dateien ist ein Verarbeitungsfehler 
> aufgetreten.
> 
> Is this ok? Not missing "Administrator"?

Should not matter - depends on your setup.

>> Those kinds of delays are often AD lookup for domain users and groups:
>> see /etc/nsswitch.conf for settings, and consider running cygserver at system 
>> or Cygwin startup to preload and cache the info.
> 
> $ cat /etc/nsswitch.conf
> # /etc/nsswitch.conf
> #
> #    This file is read once by the first process in a
> #    Cygwin process tree.
> #    To pick up changes, restart all Cygwin processes.
> #    For a description see https://cygwin.com/cygwin-ug-
> #    net/ntsec.html#ntsec-mapping-nsswitch
> #
> # Defaults:
> # passwd:   files db
> # group:    files db
> # db_enum:  cache builtin
> # db_home:  /home/%U
> # db_shell: /bin/bash
> # db_gecos: <empty>
> 
> It is at defaults.

Perhaps read and change to suit your setup, and run cygserver: advantageous if 
you run a lot of Cygwin processes, or run many processes from cmd/Windows, not 
under a Cygwin mintty/shell process tree, where the top parent takes the hit.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry