[sf-lug] Need help with an Linux assignment script

[jim]

   i looked at the link and can find nothing 
that is tagged asmt02. please provide a link 
to the exact assignment so we don't have to 
hunt around. 

   what error messages or failure symptoms do 
you get when you run this? 

   assuming the filename is  asmt02.sh  you 
can  
head -20 asmt02.sh > a2-try.sh  
and 
vi a2-try.sh  
so's to prune what you've got in your  a2-try.sh  
file so that it looks like it'll work.  
chmod 755 a2-try.sh  
and then run it and see if it works. 
   if so, then essentially 
head -30 asmt02.sh | tail -10 > a2-try.sh 
vi a2-try.sh 
in other words add a bit more to it and vi 
it and run it and keep doing so until it 
runs into a wall. 

   verify your  if elif else fi blocks  and 
 quotes and make sure that all  $  are 
correctly placed (and not missing). 
   you'll probably find the error yourself, 
but if not, provide a direct link to the 
assignment and provide a description of 
failure and we'll (at least i'll) try again. 



On Mon, 2008-04-28 at 20:07 -0700, Timothy Wang wrote:
> I am doing an assignment in City College CS160b and was having difficulty 
> understanding why it is not working. The assignment is posted on 
> 
> http://fog.ccsf.cc.ca.us/~gboyd/
> 
> under cs 160b asmt02
> 
> twang03 at hills:~ $ vi chk
> 
> #!/bin/bash
> #1st argument if filepath exists, output in readable sentences
> 
> 
> 
> 
> if [ $# -lt 2 ]; then
>     echo "chk: need -f or -u file or user" >&2
>     exit 1
> fi
> 
> if [ ! "$1" = -f ] && [ ! "$1" = -u ]; then
>     echo "chk need -f or -u plus file or user" >&2
>     exit 1
> fi
> # =====    ============================
> if [ "$1" = -f ]; then
> 
>     if [ -h "$fname" ]; then
>             echo "fname" is a path to a symbolic link
> 
>     elif [ -d "$fname" ]; then
>         echo "$fname" is a path to a directory
> 
>     elif [ -f "$fname" ]; then
>         echo "fname" is a path to a regular file
> 
>     elif [ ! -d " $fname" ] && [ ! -f "$fname" ] && [ ! -h "$fname" ];then
>         echo "$fname" is a path to an unknown filetype.
>     fi
> 
>     if [ -r "$fname" ] && [ ! -w "$fname" ] && [ ! -x "$fname" ]; then
>         echo "$fname" is readable.
>     else
>         echo "$fname" is not readable.
>     fi
> 
>     if [ -w "$fname" ] && [ ! -w "$fname" ] && [ ! -x "$fname" ]; then
>         echo "$fname" is writable
>     else
>         echo "$fname" is not writable
>     fi
> 
>     if [ -x "$fname" ] && [ ! -w "$fname" ] && [ ! -x "$fname" ]; then
>         echo "$fname" is executable
>     else
>         echo "$fname" is not executable
>     fi
> fi
> # ==================================================
> 
> if [ "$1" = -u ]; then
>     if $(! cat /etc/passwd | grep "^$2:" > /dev/null)
>     then
>         echo error found
> fi
>     login="$2"
>     name="$(finger -m "$login" | grep 'real life' | cut -d':' -f3 | tail -n1)"
> 
>     logrec="$(finger -m "$login" | grep 'Last login' | cut -d' ' -f3)"
>     whom="$(who | grep "$login")"
>     hmdir="$(finger -m "$login" | grep 'Directory: ' | cut -d' ' -f2)"
> 
>     if "$("name" = "???")"; then
>         echo "$login doesn\'t exist on this system"
>     else
>         if [ -n "$who" ]; then
>             echo "$login is currently logged into the system"
>         else
>             echo "$login"\'s last login was "$logrec"
>         fi
> 
>         echo "$login"\'s real name is "$name"
>         echo "$login"\'s home directory is located at "$hmdir"
>     fi
> fi
> 
>                                                                                                                                            77,0-1        96%
> 
> 
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