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Full Discussion: Gather File permission during scripting on unix as numbers.
Top Forums Shell Programming and Scripting Gather File permission during scripting on unix as numbers. Post 302227931 by james.witte on Friday 22nd of August 2008 08:59:35 AM
Old 08-22-2008
from what I read, ajilesh is wanting to see what the permissions are in a non-volatile way. I don't know how you do this in csh, but in ksh you can do this:

if [[ -x /usr/lib/sendmail ]] this is true if the user doing the condition, can execute /usr/lib/sendmail
if [[ -r /usr/lib/sendmail ]] this is true if the user doing the condition, can read /usr/lib/sendmail
if [[ -w /usr/lib/sendmail ]] this is true if the user doing the condition, can write /usr/lib/sendmail

but this only checks the permissions of the user performing the, in this case, if/then/else has those permissions. I do not know of any way to convert rwxrw-rw- to the octal 755 to then confirm you have the correct permissions on said file or directory. I have run into this same problem in my own scripting because the file I was checking on needed to be 766 and I was trying to track down when the permissions got changed so I could figure out what was changing the permissions, the only option I found was to ls -l <file> then pipe that into a grep on "rwxrw\-rw\-" to confirm (yes, \- is necessary to ensure it doesn't try to treat -rw as an option some how) it had the correct permissions.

while using chmod is a good suggestion, chmod sets the permissions without regard to the previous state.
 

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LEARN ABOUT OSF1

forward

forward(4)						     Kernel Interfaces Manual							forward(4)

NAME

       forward - forward mail

SYNOPSIS

       /var/adm/forward/username $HOME/.forward

DESCRIPTION

       The .forward file allows a user to forward messages to another host, or to invoke programs (such as vacation(1)) to process their mail.	It
       is formatted as a series of comma-separated addresses in the form: addr_1, addr_2, ...  Alternatively, each address can be  on  a  separate
       line.

       The newer sendmail.v8 program also allows the use of comments (lines that begin with a ``#'') and blank lines.

       As  with the aliases(4) file, mail messages can be forwarded to another host or given to programs for further processing.  The following is
       an example of the vacation program. Assuming that the user's name is myra, create a .forward  file  and	add  the  following  line:  myra,
       "|/usr/bin/vacation myra"

       The  previous  example  forwards mail to myra (the backslash prevents an accidental aliasing loop), and also sends a copy of the message to
       the vacation program.

       For security reasons, the file must be owned by the user or by root and it should be writable only by the file  owner.	In  addition,  the
       file must be readable by the owner (myra) or root.

       On  traditional	systems,  only	the  $HOME/.forward file is checked.  The sendmail.v8 program allows the use of the system-wide forwarding
       directory /var/adm/forward.  By default, this directory is checked for a forward file prior to examining the users $HOME directory.

FILES

       System-wide forwarding file.  The per-user forwarding file.

RESTRICTIONS

       The sendmail command can hang trying to read the user's $HOME/.forward file.  If the user's home directory is NFS-mounted  and  temporarily
       unavailable, sendmail will stall until the directory becomes available again.  The use of non-NFS mounted directories for the forwarding of
       files is recommended.

       The use of /var/adm/forward is supported only by sendmail.v8.

       The actual path for /var/adm/forward is configurable in the sendmail.cf file.

       Incorrect file permissions/ownership are quietly ignored.

       It is easy to create an accidental loop, for example, on host_a myra@host_b and on host_b myra@host_a

RELATED INFORMATION

       Commands:  aliases(4), sendmail.cf(4), sendmail(8) delim off

																	forward(4)
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