Today, I built and installed concurrencykit in Void Linux. When opening manual, it prompted following errors:
$ man ck_pr_barrier
man: /usr/local/share/man/man3/ck_pr_barrier.3.gz: Permission denied
man: outdated mandoc.db contains bogus man3/ck_pr_barrier.3.gz entry, run makewhatis /usr/local/share/man
man: outdated mandoc.db lacks ck_pr_barrier(3) entry, run makewhatis /usr/local/share/man
man: ERROR: /usr/local/share/man/man3/ck_pr_barrier.3.gz: Permission denied
Check the permission of manual file:
$ ll /usr/local/share/man/man3/ck_pr_barrier.3.gz
-rw------- 1 root root 1057 Dec 23 20:07 /usr/local/share/man/man3/ck_pr_barrier.3.gz
It indeed lacked read permission. Check the original file permission under my folder:
$ ll doc/ck_pr_barrier*
-rw-r--r-- 1 nan nan 2212 Dec 23 17:59 doc/ck_pr_barrier
-rw-r--r-- 1 nan nan 1057 Dec 23 20:07 doc/ck_pr_barrier.3.gz
It had read permission. The solution is adding following field in /etc/sudoers via the visudo command:
Defaults umask = 022
Reference:
Did sudo behaviour change recently?.