Scripting Help. Post: 302576970

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Homework and Emergencies Homework & Coursework Questions Scripting Help. Post 302576970 by apzombie on Sunday 27th of November 2011 09:05:14 PM

11-27-2011

Registered User

Alright so I pretty much have the script working, it's not exactly how the teacher wants. It doesn't loop the whole bash shell list and the Enter username parts. But like you said, I am running into the grep error, any hints for a quick fix to that would be awesome, right now I'm searching all the pages on grep I can looking for the correct filter to put in.
Could I just put it like | grep -x $userName ? because according to linuxabout.com -x will only take the whole thing.
Anyways, in case anyone cares here's the code I came up with so far.

Code:

#!/bin/bash
echo ""
echo "Please enter your username: "
read userName
cut -d: -f1 /etc/passwd | grep $userName > /dev/null
OUT=$?
while [ $OUT -eq 0 ]
do
echo "That username already exists, please try a different name: "
read userName
cut -d: -f1 /etc/passwd | grep $userName > /dev/null
OUT=$?
done
echo "Please enter your full name."
read fullName
echo "Available Shells"
echo "----------------"
echo "/bin/sh"
echo "/bin/bash"
echo "/sbin/nologin"
echo "/bin/tcsh"
echo "/bin/csh"
echo "/bin/ksh"
echo "Enter the user's shell: "
read regShell
until [ $regShell = "/bin/sh" ] || [ $regShell = "/bin/bash" ] || [ $regShell = "/sbin/nologin" ] || [ $regShell = "/bin/tcsh" ] || [ $regShell = "/bin/csh" ] || [ $regShell = "/bin/ksh" ]
do
echo "Invalid shell, try again: "
read regShell
done
useradd -c "$fullName" -s $regShell $userName
if [ $? = 0 ]; then
echo "User was created successfully."
fi

edit: grep -x did nothing, even tried grep -x "^$userName$", that didn't work. My textbook only has 5 pages about grep, none of which describe they just say use it, and the only extension they use is -i which makes the command disregard caps. hrmm.

Last edited by apzombie; 11-27-2011 at 10:16 PM..

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LEARN ABOUT ULTRIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)