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Full Discussion: User Accounts
Top Forums Shell Programming and Scripting User Accounts Post 47639 by Sensor on Sunday 15th of February 2004 05:01:21 AM
Old 02-15-2004
Question User Accounts
I have found a script to create user accounts. But there are a few lines i dont understand. Can someone help me with this? Here's the code:

######################################

while [ $TOTAL -gt 0 ];
do
ACCT=${USER_ACCT}${START}
START=`expr $START + 1`
START=`echo ${START} | awk '{printf("%02d",$1)}'`
TOTAL=`expr $TOTAL - 1`
useradd -g ${GROUP_ID} -d ${TOP_LEVEL_DIR}/${ACCT} -c 'Student Acct' -m -s /bin/ksh ${ACCT}
(cd ${TOP_LEVEL_DIR}/coursefiles; tar cf - . | (cd ${TOP_LEVEL_DIR}/${ACCT}; tar xf -))
chown -R ${ACCT} ${TOP_LEVEL_DIR}/${ACCT}
chgrp -R ${GROUP_ID} ${TOP_LEVEL_DIR}/${ACCT}
chmod 755 ${TOP_LEVEL_DIR}/${ACCT}
echo "Account ${ACCT} created."
echo
done


ACCT=${USER_ACCT}${START_SAV}
echo "Enter the default password to use for the recently created accounts"
echo
passwd ${ACCT}
PASSWORD=`grep '^'${ACCT}':' /etc/shadow |cut -d: -f2`

START=`expr $START_SAV + 1`
START=`echo ${START} | awk '{printf("%02d",$1)}'`
TOTAL=`expr $TOTAL_SAV - 1`

while [ $TOTAL -gt 0 ];
do
ACCT=${USER_ACCT}${START}
ed /etc/shadow <<EOF
g/${ACCT}:/s/:\*LK\*:/:${PASSWORD}:
W
Q
EOF
START=`expr $START + 1`
START=`echo ${START} | awk '{printf("%02d",$1)}'`
TOTAL=`expr $TOTAL - 1`
done

######################################

Thanks!!!
 

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checkbashisms

CHECKBASHISMS(1)					      General Commands Manual						  CHECKBASHISMS(1)

NAME

       checkbashisms - check for bashisms in /bin/sh scripts

SYNOPSIS

       checkbashisms script ...
       checkbashisms --help|--version

DESCRIPTION

       checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence
       of bashisms.  It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected.

       Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported  by  POSIX";
       this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability.

       In  cases  where  POSIX	and  Debian  Policy  disagree, checkbashisms by default allows extensions permitted by Policy but may also provide
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OPTIONS

       --help, -h
	      Show a summary of options.

       --newline, -n
	      Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.)

       --posix, -p
	      Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n).

       --force, -f
	      Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears
	      to be a shell wrapper).

       --extra, -x
	      Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi-
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EXIT VALUES

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SEE ALSO

       lintian(1).

AUTHOR

       checkbashisms  was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by
       Julian Gilbey <jdg@debian.org>.

DEBIAN
								 Debian Utilities						  CHECKBASHISMS(1)
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