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Full Discussion: Script as login shell (passing args to login shell)
Top Forums Shell Programming and Scripting Script as login shell (passing args to login shell) Post 302895343 by maverick72 on Monday 31st of March 2014 10:14:03 AM
Old 03-31-2014
Script as login shell (passing args to login shell)
Hello all,

for security reasons my compagny imposes that my script be launch remotly via ssh under the users login shell.

So serverA launches the ssh command to serverB which has a local user with my script as a login shell.

Local script works like a charm on his own.

Code:
serverB$ grep user1 /etc/passwd
user1:x:921:921::/home/user1:/home/user1/insert_host_ip_named.bash

serverA$ ssh -t user1@serverB

Everything works fine until i bring up arguments

For testing purpose i've replaced the 3 first lines of my script with:
Code:
echo $#
echo $*
sleep 3
exit

and i get this:
Code:
 ssh user1@serverB -- "-i 275.30.44.55 -n WYWYOU"
2
-c -i 275.30.44.55 -n WYWYOU

Which is not good cause the script needs at least 4 args to run:
Code:
# Check number of arguments
case $# in
         4|5) ;;
         *) usage; exit 1 ;;
esac

Any way too make him pass more than 2 arguments?... and he's probably counting the -c as one.
 

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LEARN ABOUT DEBIAN

chsh

CHSH(1) 							   User Commands							   CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
	   Display help message and exit.

       -R, --root CHROOT_DIR
	   Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
	   The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
	   User account information.

       /etc/shells
	   List of valid login shells.

       /etc/login.defs
	   Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.1.5.1						    05/25/2012								   CHSH(1)
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