dovecot - Sep 2016 - dovecot-2.2.18 / net_listen_unix(...) failed: Value too large for defined data type

Dear All,

SUMMARY: 
Dovecot shows an issue when "localstatedir" path is too long
The issue exists also with dovecot-2.2.25

CONFIGURATION:
The configure options are:

./configure --prefix=${TARGET_DIR} \
--sysconfdir=${TARGET_DIR}/cfg \
--localstatedir=${TARGET_DIR}/var \
--with-ssl=openssl \
--with-sqlite \
--disable-shared

RESULTS:
When executing dovecot (as root), the followin message appears:

Error: service(dict):
net_listen_unix(/<user>/localbin/minnowboard-turbot-applications/1.0/linux/x86_64-linux/localbin/dovecot/2.2.18/linux/x86_64-linux/var/run/dovecot/dict)
failed: Value too large for defined data type
Error: service(config):
net_listen_unix(<user>/localbin/minnowboard-turbot-applications/1.0/linux/x86_64-linux/localbin/dovecot/2.2.18/linux/x86_64-linux/var/run/dovecot/config)
failed: Value too large for defined data type
---

WORKAROUND:
The problem is solved by defining shorten localstatedir or using base_dir =
/var/run/dovecot.

It seems the path lengh causing a such issue. Path Lengh > 127

Available for additional experiments
Best Regards

> On September 25, 2016 at 4:54 PM Christophe Bricout <christophebricout
at yahoo.fr> wrote:
> 
> 
> Dear All,
> 
> SUMMARY: 
> Dovecot shows an issue when "localstatedir" path is too long
> The issue exists also with dovecot-2.2.25
> 
> CONFIGURATION:
> The configure options are:
> 
> ./configure --prefix=${TARGET_DIR} \
> --sysconfdir=${TARGET_DIR}/cfg \
> --localstatedir=${TARGET_DIR}/var \
> --with-ssl=openssl \
> --with-sqlite \
> --disable-shared
> 
> RESULTS:
> When executing dovecot (as root), the followin message appears:
> 
> Error: service(dict):
net_listen_unix(/<user>/localbin/minnowboard-turbot-applications/1.0/linux/x86_64-linux/localbin/dovecot/2.2.18/linux/x86_64-linux/var/run/dovecot/dict)
failed: Value too large for defined data type
> Error: service(config):
net_listen_unix(<user>/localbin/minnowboard-turbot-applications/1.0/linux/x86_64-linux/localbin/dovecot/2.2.18/linux/x86_64-linux/var/run/dovecot/config)
failed: Value too large for defined data type
> ---
> 
> WORKAROUND:
> The problem is solved by defining shorten localstatedir or using base_dir =
/var/run/dovecot.
> 
> It seems the path lengh causing a such issue. Path Lengh > 127
> 
> Available for additional experiments
> Best Regards
Hi! 

Unix socket maximum path len is 108 characters. This is *nix limitation, not
dovecot.

---
Aki Tuomi
Dovecot oy