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Built-in "test -x" fails for root on FreeBSD


From: Johan Hattne
Subject: Built-in "test -x" fails for root on FreeBSD
Date: Fri, 29 Apr 2011 11:25:51 -0500
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110328 Lightning/1.0b3pre Thunderbird/3.1.9

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: freebsd8.0
Compiler: i686-gentoo-freebsd8.0-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='freebsd8.0' -DCONF_MACHTYPE='i686-gentoo-freebsd8.0'
-DCONF_VENDOR='gentoo' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
-DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib
-DDEFAULT_PATH_VALUE='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
-DSTANDARD_UTILS_PATH='/bin:/usr/bin:/sbin:/usr/sbin'
-DSYS_BASHRC='/etc/bash/bashrc'
-DSYS_BASH_LOGOUT='/etc/bash/bash_logout' -DNON_INTERACTIVE_LOGIN_SHELLS
-DSSH_SOURCE_BASHRC -march=pentium4 -O2 -pipe -fomit-frame-pointer
uname output: FreeBSD life 8.0-RELEASE FreeBSD Gentoo 8.0 #3: Fri Jun 25
14:48:40 CDT 2010     address@hidden:/usr/src/sys-8.0-r0/i386/compile/LIFE
 i386
Machine Type: i686-gentoo-freebsd8.0

Bash Version: 4.2
Patch Level: 8
Release Status: release

Description:
  Following a report about a year ago, the determination of the
  executable status used by bash's built-in test command was changed.
  The original issue was that the access(2) family of functions may
  indicate success for X_OK, even if the file does not actually have
  any execute permission bits set.  This is allowed by the
  specification for historical reasons, even though discouraged for new
  implementations

(http://pubs.opengroup.org/onlinepubs/9699919799/functions/faccessat.html).
  On FreeBSD which provides faccessat(2) as well as eaccass(2), this
  causes test -x to report false positives.


Repeat-By:
  bash# test -x /etc/passwd && echo "SUCCESS"
  SUCCESS


Fix:
--- lib/sh/eaccess.c.orig       2011-04-15 08:34:35.458519500 -0500
+++ lib/sh/eaccess.c    2011-04-15 09:11:35.698844210 -0500
@@ -203,14 +203,14 @@
   if (path_is_devfd (path))
     return (sh_stataccess (path, mode));

-#if defined (HAVE_FACCESSAT) && defined (AT_EACCESS)
-  return (faccessat (AT_FDCWD, path, mode, AT_EACCESS));
-#elif defined (HAVE_EACCESS)           /* FreeBSD */
-  ret = eaccess (path, mode);  /* XXX -- not always correct for X_OK */
-#  if defined (__FreeBSD__)
+#if defined (HAVE_FACCESSAT) && defined (AT_EACCESS) || defined
(HAVE_EACCESS)
+#  if defined (HAVE_FACCESSAT) && defined (AT_EACCESS)
+  ret = faccessat (AT_FDCWD, path, mode, AT_EACCESS);
+#  else
+  ret = eaccess (path, mode);
+#  endif
   if (ret == 0 && current_user.euid == 0 && mode == X_OK)
     return (sh_stataccess (path, mode));
-#  endif
   return ret;
 #elif defined (EFF_ONLY_OK)            /* SVR4(?), SVR4.2 */
   return access (path, mode|EFF_ONLY_OK);



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