On Apr 22, 2013, at 10:36 AM, Ben Franksen <[email protected]> wrote:
>> That's really interesting… what version of libc are you using? And on what
>> host OS?
>
> Nothing special (I think!):
>
> ben@sarun[1]: ~ > uname -a
> Linux sarun 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux
>
> [snip]
>
> I wrote a little test program that returns the value returned by pathconf
> for a given start path, which is enlightening:
>
> ben@sarun[1]: ~/tmp > cat test-unistd.c
> #include <unistd.h>
> #include <stdio.h>
>
> int main (int argc, char **argv)
> {
> printf("pathconf(\"%s\", _PC_NAME_MAX)=%ld\n", argv[1],
> pathconf(argv[1], _PC_NAME_MAX));
> return 0;
> }
> ben@sarun[1]: ~/tmp > ./a.out /home/ben
> pathconf("/home/ben", _PC_NAME_MAX)=255
> ben@sarun[1]: ~/tmp > ./a.out /home/ben/ctl
> pathconf("/home/ben/ctl", _PC_NAME_MAX)=2147483647
>
> Note that /home/ben/ctl is a symlink into my sshfs-mounted remote
> filesystem.
>
> So, it appears that the locals fs (ext4) has a sane limit but sshfs does
> not.
That makes some sense… sshfs is probably trying to avoid a round-trip to the
server and is just reporting MAX_LONG.
I'm not a core fish contributor, but I expect that given this scenario, the
code should be checking for ln <0 || ln > MAX_FILE_LENGTH:
if (ln < 0 || ln > MAX_FILE_LENGTH)
ln = MAX_FILE_LENGTH;
-Nick
> BTW, I mounted the sshfs with afuse; this is my setup:
>
> ben@sarun[1]: ~/tmp > pgrep -lf afuse
> 7611 afuse /home/ben/sshfs -o mount_template=sshfs %r:/ %m -o
> idmap=file\,uidfile=/home/ben/.ssh/uid-aragon\,gidfile=/home/ben/.ssh/gid-
> aragon\,nomap=ignore\,reconnect -o unmount_template=fusermount -u -z %m
> 7799 sshfs [email protected]:/ /tmp/afuse-
> f3tZoi/[email protected] -o
> idmap=file,uidfile=/home/ben/.ssh/uid-aragon,gidfile=/home/ben/.ssh/gid-
> aragon,nomap=ignore,reconnect
>
>
> Cheers
> --
> Ben Franksen
> () ascii ribbon campaign - against html e-mail
> /\ www.asciiribbon.org - against proprietary attachm€nts
>
>
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
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