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Full Discussion: Create script to add user and create directory
Homework and Emergencies Homework & Coursework Questions Create script to add user and create directory Post 302506513 by m1xram on Monday 21st of March 2011 04:24:30 AM
Old 03-21-2011
groupadd useradd
Couple of thoughts. Once you find that a department doesn't exist and create the directory for, it you may wish to create a group for it with 'groupadd'. Then set the GID to the newly created group.

A similar situation should be done for the user directory although you should create the directory with 'useradd'. 'useradd -g GROUP' will make sure the directory has the correct GID. Use the '-K UMASK=026' to make sure newly created files have the correct permissions. You'll have to look up how UMASK works. In this environment you may prefer 027 for more security.

A better way to handle the departments would be to create a list of valid existing departments. It would reduce spelling errors. The last option in the list could be "(N)ew department".

Code:
#!/bin/ksh
# root check code below
#deptroot=/home
deptroot=/home/wolverines
i=0
dept=()
echo "Department:"
find $deptroot -maxdepth 1 -type d | sort | while read x ;do
    bn=$(basename "$x");
    dept[$i]="$bn"
    i=$(($i + 1))
    echo "$i) $bn"
done
echo ""
echo -n "Enter number of department or 'n' for new department: "
read ans
echo "${dept[*]}"
if [[ "$ans" =~ ^[0-9]+$ ]]; then
    echo "Numeric $ans $i"
    if [ $ans -lt $i ]; then 
       echo "In range"
       d="${dept[$(($ans - 1))]}"
       echo "Department: $d"
    fi
elif [ "$ans" == "n" ]; then
    echo "Prompt for new department"
    # assign d=DEPARTMENT
    # make sure it doesn't exist.. if exists exit
    # groupadd $d
    # mkdir "$depthome/$d"
    # chgrp $d "$depthome/$d"
else
    echo "bad input"
    exit 1
fi

Output Example:
Code:
$ ./test.sh 
Department:
1) History
2) Math
3) PhysEd
4) Science
5) Zoology

Enter number of department or 'n' for new department: 3
History Math PhysEd Science Zoology
Numeric 3 5
In range
Department: PhysEd

Sorry but I had to use KSH as BASH has a bug with pipes and while loops spawning subprocesses. BASH can't see what happened in the loop after the loop.

Lastly I'd add a check for the user ID at the beginning of your script.
Code:
if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

Only people with root access should be able to run any of this.
 

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LEARN ABOUT MOJAVE

ipcmk

IPCMK(1)							   User Commands							  IPCMK(1)

NAME

       ipcmk - make various IPC resources

SYNOPSIS

       ipcmk [options]

DESCRIPTION

       ipcmk allows you to create shared memory segments, message queues, and semaphore arrays.

OPTIONS

       Resources can be specified with these options:

       -M, --shmem size
	      Create  a  shared  memory  segment of size bytes.  The size argument may be followed by the multiplicative suffixes KiB (=1024), MiB
	      (=1024*1024), and so on for GiB, etc. (the "iB" is optional, e.g., "K" has the same meaning as "KiB") or the suffixes KB (=1000), MB
	      (=1000*1000), and so on for GB, etc.

       -Q, --queue
	      Create a message queue.

       -S, --semaphore number
	      Create a semaphore array with number of elements.

       Other options are:

       -p, --mode mode
	      Access permissions for the resource.  Default is 0644.

       -V, --version
	      Display version information and exit.

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

SEE ALSO

       ipcrm(1), ipcs(1)

AUTHOR

       Hayden A. James <hayden.james@gmail.com>

AVAILABILITY

       The  ipcmk  command  is	part  of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							     July 2014								  IPCMK(1)
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