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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 NETBSD

mailer.conf

MAILER.CONF(5)						      BSD File Formats Manual						    MAILER.CONF(5)

NAME

     mailer.conf -- configuration file for mailwrapper(8)

DESCRIPTION

     The file /etc/mailer.conf contains a series of lines of the form

     name program [arguments ...]

     The first word of each line is the name of a program invoking mailwrapper(8).  (For example, on a typical system /usr/sbin/sendmail would be
     a symbolic link to mailwrapper(8), as would newaliases(1) and mailq(1).  Thus, name might be ``sendmail'' or ``newaliases'' etc.)

     The second word of each line is the name of the program to actually execute when the first name is invoked.

     The further arguments, if any, are passed to the program, followed by the arguments mailwrapper(8) was called with.

     The file may also contain comment lines, denoted by a '#' mark in the first column of any line.

     The default mailer is postfix(1), which will also start by default (unless specifically disabled via an rc.conf(5) setting) so that locally
     generated mail can be delivered, if the ``sendmail'' setting in /etc/mailer.conf is set to ``/usr/libexec/postfix/sendmail''.

FILES

     /etc/mailer.conf

EXAMPLES

     This example shows how to set up mailer.conf to invoke the postfix(1) program:

	   sendmail	   /usr/libexec/postfix/sendmail
	   mailq	   /usr/libexec/postfix/sendmail
	   newaliases	   /usr/libexec/postfix/sendmail

     This example shows the use of the mini-sendmail package from pkgsrc in place of postfix(1):

	   # Send outgoing mail to a smart relay using mini-sendmail
	   sendmail	   /usr/pkg/sbin/mini-sendmail -srelayhost
	   send-mail	   /usr/pkg/sbin/mini-sendmail -srelayhost

     Note the use of additional arguments.

SEE ALSO

     mail(1), mailq(1), newaliases(1), postfix(1), mailwrapper(8)

     pkgsrc/mail/sendmail, pkgsrc/mail/mini_sendmail

HISTORY

     mailer.conf appeared in NetBSD 1.4.

AUTHORS

     Perry E. Metzger <perry@piermont.com>

BUGS

     The entire reason this program exists is a crock.	Instead, a command for how to submit mail should be standardized, and all the ``behave
     differently if invoked with a different name'' behavior of things like mailq(1) should go away.

BSD
								  April 10, 2010							       BSD
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