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Full Discussion: OSX verify username and password in one line
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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LEARN ABOUT OSF1

yppasswd

yppasswd(1)						      General Commands Manual						       yppasswd(1)

NAME

       yppasswd - change password in Network Information Service (NIS)

SYNOPSIS

       yppasswd [name]

DESCRIPTION

									  Note

       If Enhanced Security is enabled on your system, use the passwd command to change your password, even if NIS is in use.

       The  yppasswd command lets you change your password in the Network Information Service (NIS) map, a network data base service.  Only you or
       the superuser can change your NIS password.

       When you enter the yppasswd command, the program prompts you for the old password and then for the new password. Note  that  the  passwords
       are not displayed on the screen.

       Next,  the  program asks you for the new password again, to verify that you have typed it correctly.  If you do not type the passwords cor-
       rectly, you will receive an error message after you enter the new password.

       Your new NIS password must meet one of the following requirements: It must be a combination of at least six alphanumeric characters, or	It
       must be a minimum of four characters, with at least one being non-alphanumeric, such as a control sequence.

									  Note

       The passwd command does not change the NIS password.  This command only changes the local password file (/etc/passwd), and not the NIS mas-
       ter password file.

ERRORS

       Your new password does not meet the minimum length requirement.	You misspelled your new password or its verification.  Your  new  password
       can not be activated. It must be different from your old password and your login name.

FILES

       Password file NIS directory

SEE ALSO

       passwd(1), passwd(4), ypfiles(4), yppasswdd(8)

       Network Administration

																       yppasswd(1)
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