Am 21.03.2017 um 14:29 schrieb Zenobiusz Kunegunda:
I think I found a way to reproduce this error.
I installed FreeBSD 10.3 under qemu with zfs partitioning.
Test program did not report any access errors.
Then I did chmod 711 /usr/home
Now program started reporting permission denied errors just like this:
$ ./a.out
len = 0, errno = 22, Invalid argument
len = 1, errno = 34, Result too large
len = 2, errno = 13, Permission denied
len = 20, errno = 0, No error: 0
Yes, and I think we can take ZFS out of the equation. As a regular user
I get this with UFS and for $mode values of 000, 100 or 400 (with umask
0022):
$ mkdir -p /tmp/a/b && cd /tmp/a/b
$ chmod $mode /tmp/a && getcwdtest
len = 0, errno = 22, Invalid argument
len = 1, errno = 34, Result too large
len = 2, errno = 13, Permission denied
len = 9, errno = 0, No error: 0
Only with both read and execute/search permissions for the intermediate
directory I get rid of that irritating permission error for small buffers:
$ chmod 500 /tmp/a && getcwdtest
len = 0, errno = 22, Invalid argument
len = 1, errno = 34, Result too large
len = 9, errno = 0, No error: 0
So a workaround for you would be to run "chmod a+rx" (or similar)
against all parent directories of your repository. Another one would be
to keep the path length below 128 characters (that's the initial buffer
size in strbuf_getcwd()).
Have you been able to test the patch I sent on Friday by any chance?
Thanks,
René
