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[[ -x file ]]

X-seq: zsh-workers 3121
From: Zefram <zefram@xxxxxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxxxxxxxxxx
Subject: [[ -x file ]]
Date: Sun, 11 May 1997 18:51:08 +0100 (BST)

The ChangeLog for 3.1.2-test1:
#	* Src/cond.c: [[ -x file ]] does stat for privileged users

I think this is a bad idea.  access(, X_OK) is the right way to test for
executability.  The new test gets it wrong over NFS with root squash,
and on directories with no execute bits set (which *are* executable to
the super-user).  Furthermore, with POSIX.1e capabilities, it is one
specific capability (well, two, CAP_DAC_READ_SEARCH for directories and
CAP_DAC_EXECUTE for files) that overrides normal DAC, whereas the new
code tests for *any* capability being set.

What was the reason for this change?

-zefram

Follow-Ups:
- Re: [[ -x file ]]
  - From: Zoltan Hidvegi

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