Can some one here explain why accessing a NFSv4/ZFS xattr directory
through proc is forbidden?
To explain the problem in shell code (cd -@ is a new option to enter
the XATTR store, redirect {n}<... opens a file or directory and
assigns the fd number to variable 'n'):
ksh -c 'touch x ; cd -@ x ; redirect {n}<"." ; cd .. ; print "hello"
>/proc/$$/fd/$n/myxattr ; true'
/home/fleyta/bin/ksh: /proc/3982/fd/10/myxattr: cannot create
[Permission denied]
truss says the syscall fails with
open("/proc/3988/fd/10/myxattr", O_WRONLY|O_CREAT|O_TRUNC, 0666) Err#13 EACCES
Accessing files or directories through /proc/$$/fd/ from a shell
otherwise works, only the xattr directories cause trouble. Native C
code has the same problem.
Olga
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{ \/`o;====- Olga Kryzhanovska -====;o`\/ }
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`'-..-| / http://twitter.com/fleyta \ |-..-'`
/\/\ Solaris/BSD//C/C++ programmer /\/\
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