in reply to Re: /usr/bin/instmodsh: Permission denied.
in thread /usr/bin/instmodsh: Permission denied.

Hi! All,

Thank for trying to help. No offense taken. I am a biologist and my Perl knowledge is limited to the book "Learning Perl", and have minimal Unix knowledge, which you can already tell from my question.

I am using MacOS 10.6.3 Terminal with Perl Version v5.10.0.

Terminal Shell is "tcsh".

File permission at top directory:

[yigite:/] rnaeye% ls -l
total 36500
drwxrwxr-x+ 90 root    admin       3060 May 22 15:27 Applications
drwxrwxrwx@  8 501     admin        272 Dec 15  2003 Conversion Progra
+ms
drwxr-xr-x@ 10 rnaeye  rnaeye       340 Mar  9  2006 Desktop Folder
drwxrwxr-x@ 19 root    admin        646 May 22 20:17 Developer
drwxr-xr-x@  6 rnaeye  rnaeye       204 Jan 11  2008 Documents
drwxrwxr-t+ 65 root    admin       2210 May  8 16:45 Library
drwxr-xr-x@  2 root    wheel         68 Feb 10 22:43 Network
drwxr-xr-x   4 root    wheel        136 May  8 14:24 System
lrwxr-xr-x   1 root    admin         60 May  7 18:29 User Guides And I
+nformation -> /Library/Documentation/User Guides and Information.loca
+lized
lrwxr-xr-x   1 root    admin         60 Sep  9  2008 User Guides And I
+nformation (from old Mac) -> /Library/Documentation/User Guides and I
+nformation.localized
drwxr-xr-x   7 root    admin        238 May 19 16:38 Users
drwxrwxrwt@  3 root    admin        102 May 22 20:23 Volumes
drwxr-xr-x@ 39 root    wheel       1326 May  8 14:23 bin
drwxrwxr-t@  2 root    admin         68 Feb 10 22:43 cores
dr-xr-xr-x   3 root    wheel       4079 May 22 20:22 dev
lrwxr-xr-x@  1 root    wheel         11 May  8 14:23 etc -> private/et
+c
dr-xr-xr-x   2 root    wheel          1 May 22 20:23 home
-rw-r--r--@  1 root    wheel   18659362 Feb 26 13:59 mach_kernel
dr-xr-xr-x   2 root    wheel          1 May 22 20:23 net
drwxr-xr-x@  7 root    wheel        238 May  8 16:18 private
drwxr-xr-x@ 64 root    wheel       2176 May  8 14:24 sbin
lrwxr-xr-x@  1 root    wheel         11 May  8 14:23 tmp -> private/tm
+p
drwxr-xr-x@ 14 root    wheel        476 May 22 20:20 usr
lrwxr-xr-x@  1 root    wheel         11 May  8 14:23 var -> private/va
+r

[download]

File permissions at yigite:/usr rnaeye%: 

 
[yigite:/usr] rnaeye% ls -l
total 8
drwxr-xr-x     8 root  wheel    272 May  8 14:31 X11
lrwxr-xr-x     1 root  wheel      3 May  8 14:31 X11R6 -> X11
drwxr-xr-x  1090 root  wheel  37060 May 22 20:33 bin
drwxr-xr-x     4 root  wheel    136 Feb 24 20:10 etc
drwxr-xr-x   271 root  wheel   9214 May 22 20:18 include
drwxr-xr-x   387 root  wheel  13158 May 22 20:20 lib
drwxr-xr-x   106 root  wheel   3604 May 22 20:20 libexec
drwxrwxr-x     7 root  admin    238 Jan 20 00:45 llvm-gcc-4.2
drwxr-xr-x     9 root  wheel    306 May  8 16:19 local
drwxr-xr-x   236 root  wheel   8024 May 22 20:20 sbin
drwxr-xr-x    74 root  wheel   2516 May 22 20:20 share
drwxr-xr-x     4 root  wheel    136 May  8 14:23 standalone

[download]

Since I cannot find where Bundle::CPAN is located I cannot send you file permissions for it.

Thanks for your time. I really appreciate it.

Replies are listed 'Best First'.
Re^3: /usr/bin/instmodsh: Permission denied.
by Anonymous Monk on May 23, 2010 at 15:38 UTC
    What are the permissions on the files instmodsh and perldoc?

    Have you tried $ perl -S instmodsh or $ perl -S perldoc?

    When you get perldoc working try 

    
$ perldoc -l strict
C:\perl\5.10.1\lib\strict.pm

$ perldoc -l HTML::Template
C:\perl\site\5.10.1\lib\HTML\Template.pm

$ perldoc -l Bundle::CPAN
No documentation found for "Bundle::CPAN".

$ which instmodsh
C:/perl/5.10.1/bin/instmodsh

$ perldoc -l instmodsh
C:\perl\5.10.1\bin\instmodsh

    [download]
    Alternatively 
    $ perl -Mstrict -le " print for values %INC"
C:/perl/5.10.1/lib/strict.pm

    [download]
[reply]
[d/l]
[select]

      Thank you everyone. Someone from apple.com>Unix forum solved my problem. I needed to change the file permissions as below. 

      old file permissions:
-rw-rw-rw-  34 root    wheel         807 Jun 24  2009 instmodsh
-rw-rw-rw-  34 root    wheel         807 Jun 24  2009 perldoc

      [download]

      I set the execute bit using:

      sudo chmod +x /usr/bin/instmodsh /usr/bin/perldoc 
      new file permissions:
-rwxrwxrwx  34 root    wheel         807 Jun 24  2009 perldoc
-rwxrwxrwx  34 root    wheel         807 Jun 24  2009 instmodsh

      [download]

      Now, it works!

[reply]
[d/l]
[select]

        I would recommend auditing your system. The permissions on these files are not sane, and I would not trust that these are the only ones.

        Both the old and the new file permissions are insanely insecure. Whatever set the initial permissions should be sought out summarily executed.

        Unix permissions are grouped into a type indicator, and three groups of three permission "bits".

        • Char 1: type indicator. '-' is a "regular" file, 'd' is a directory, 'l' is a symlink, 'c' is a character special file, 'b' is a block special file, and so on.
        • Char 2-4: Owner ("root" in this case) permissions. Read, Write, Execute.
        • Char 5-7: Group ("wheel" in this case) permissions. Read, Write, Execute.
        • Char 8-10: Other permissions. Read, Write, Execute.

        What do you think happens when Read, Write, and Execute are enabled for other (hint: "other" is able to change the file)? Does a privileged user ever execute that file (hint: if "yes", "other" now has control over what privileged user is executing)?

        The solution given by the mac forum is accurate (that command adds the execute bit to owner, group, and other), but is incomplete. You also need to remove the write permissions from those files. As mentioned above, I would not trust that these are the only files with insecure permissions.

        Update: Removed assumptions about Unix knowledge (added 'hints').

        --MidLifeXis

[reply]
        Lol, always check the obvious first. But there is no way Bundle::CPAN changed the permissions on instmodsh/perldoc... thats unpossable
[reply]

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