Idea for an "informative" bash alias or script Post: 302316334

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Top Forums Shell Programming and Scripting Idea for an "informative" bash alias or script Post 302316334 by cfajohnson on Thursday 14th of May 2009 07:51:30 PM

05-14-2009

Registered User

Quote:

Originally Posted by pludi

I hate it when something catches my interest and won't go away until I can have a hack at it:

Code:

$ cat fileinfo.sh
function showAll {

The standard syntax for function declaration is:
Code:
showAll() {

Quote:

Code:

    filename=$1
    echo "File: '${1}'"
    type=$( file "${filename}" | cut -d: -f2- )

There's no need for an external command (cut):
Code:
type=$( file "${filename}" )
type=${type#*:}

Quote:

Code:

    stat -c "%F~%U~%u~%G~%g~%s~%x~%y~%z" ${filename} | \

There's no need for a backslash after a pipe. It is only necessary when the command would be complete as it stands; a command ending with a pipe (or && or ||, etc.) is not complete, therefore the backslash is unnecessary.

Quote:

Code:

    while IFS='~' read typ user uid group gid size atime mtime ctime
    do
        echo "Type: ${type} (${typ})"
        echo "Ownership: ${user} (${uid}) ${group} (${gid})"
        echo "Size: ${size}"
        echo "Last access: ${atime}"
        echo "Last modification: ${mtime}"
        echo "Last change: ${ctime}"
    done
}
$ showAll fileinfo.sh
File: 'fileinfo.sh'
Type:  ASCII text (regular file)
Ownership: pludi (1000) users (100)
Size: 496
Last access: 2009-05-11 19:25:24.000000000 +0200
Last modification: 2009-05-11 19:23:48.000000000 +0200
Last change: 2009-05-11 19:25:14.000000000 +0200

Tested on Linux and Cygwin. Modify to your hearts desire.

Next exercise: modify the function so that it works on other systems. BSD systems have a stat command that uses a different syntaxt; other systems do not have a stat command.

cfajohnson

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