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Operating Systems OS X (Apple) OSX verify username and password in one line Post 302749861 by jim mcnamara on Saturday 29th of December 2012 08:33:34 PM
Old 12-29-2012
MEL used to be the maya embedded scripting language. What does that have to do with a bash terminal command? It sounds like you need the MEL syntax to execute a bash script or command.

I do not know MEL - you get to figure out how to execute something like this native UNIX statement:
Code:
/bin/bash -c '/folder/to/myscript.sh foo bar'

where foo is the valid username and bar is the valid password. And be able to see the status return code of the script a 1 (one) or a 0 (zero).

script lives in /somefolder/somewhere/you/put/it, with file permissions 755:
Code:
#!/bin/bash
trap 'exit 1' INT
echo -n 'Enter username: '
read u
echo -n 'password: '
read p
[[ "$1" = "$u"  && "$2" = "$p" ]] && exit 0 
exit 1

myscript.sh does all the stuff you cannot do in "one line", it has a status code of 0 if all is well, 1 otherwise.

Plus - as a wild guess - I believe that your question is probably ill-formed. There must be a way to run your MEL script process from bash itself under maya, maya is an executable. You are already running MEL.

You could construct your password query there, since you appear to have a hard-coded password and username anyway. Then either run or not run the entire maya/app/scripts bundle.
partial bash/Pseudocode ( I know nothing about maya)
Code:
#!/bin/bash
password=bar
username=foo

trap 'exit 1' INT
echo -n 'Enter username: '
read u
echo -n 'password: '
read p
[[ "$1" != "$username"  || "$2" != "$password" ]] && exit 1
# run maya bundle here
maya blah blah

 

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shexp(1)						      General Commands Manual							  shexp(1)

Name
       shexp - display password expiration information for a user

Syntax
       shexp [-q] [username]

Description
       The command is used to display a user's password expiration information.  The specified username, or logname if no username is supplied, is
       converted to a UID by searching through the passwd file.  The UID is then used to look up the user's entry in  the  Auth  Data  Base.   The
       password expiration information is then printed out in format.
       % shexp
       Expires Tue Dec	6 10:49:18 EST 1988
       If  the	password  has  already expired the word Expires will be replaced with the word Expired. If password expiration is disabled for the
       particular user in question the output of will be Never expires.

Options
       -q   Instead of displaying the expiration date and time in format, outputs it as three decimal numbers: the minimum password lifetime,  the
	    maximum password lifetime, and the password modification time.  All three numbers are displayed as they are found in the database.

Restrictions
       Only the super-user may obtain information about users with UIDs other than the real UID of the invoking process.

Diagnostics
       User not found in passwd data base.
       There is no entry in for the specified username.

       Cannot stat auth file.
       The database is missing (security features may not be enabled).

       Insufficient privilege.
       An insufficiently privileged user is asking for information about a username with a UID different then their current real-UID.

       An exit value of 0 indicates a successful operation, any other exit status indicates an error.

Files
See Also
       passwd(1), getauthuid(3), auth(5)
       Security Guide for Users

																	  shexp(1)
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