Help with redirecting output to an HTML file Post: 302949773

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Top Forums UNIX for Dummies Questions & Answers Help with redirecting output to an HTML file Post 302949773 by braing on Thursday 16th of July 2015 01:08:12 AM

07-16-2015

Registered User

I'm scripting for a class, so I have a lot on here that might be jumbled and unnecessary for what I want to do.

Code:

#!/bin/bash -x

# A slicker error handling routine

# I put a variable in my scripts name PROGNAME which
# holds the name of the program being run. You can get this
# value from the first item on the command line ($0).

PROGNAME=$(basename $0)

error_exit()
{

#       ------------------------------------------------------------
#       Function for exit due to fatal program error
#               Accepts 1 argument:
#                       string containing descriptive error message
#       ------------------------------------------------------------

        echo "${PROGNAME}: ${1:-"Unknown Error"} 1>&2
        exit 1
}

# Example call of the error_exit function. Note the inclusion
# of the LINENO environment variable. It contains the current
# line number.

echo "Example of error with line number and message"
error_exit "$LINENO: An error has occurred."

echo "You start with $# positional parameters"

# Loop until all parameters are used up
while [ "$1" != "" ]; do
        echo "Parameter 1 equals $1"
        echo "You now have $# positional parameters"

  # Shift all the parameters down by one
        shift
done

#sysinfo_page - A script to produce an HTML file

##### Constants

TITLE="System Information for $HOSTNAME"
RIGHT_NOW=$(date +"%x %r %Z")
TIME_STAMP="Updated on $RIGHT_NOW by $USER"

##### Functions

system_info()
{
        # Find any release files in /etc

        if ls /etc/*release 1>/dev/null 2>&1; then
                echo "<h2>System release info</h2>"
                echo "<pre>"
                for i in /etc/*release; do
                        # Since we can't be sure of the
                        # length of the file, only
                        # display the first line.

                        head -n 1 $i
                done
                uname -orp
                echo "</pre>"
        fi

}       # end of system_info

show_uptime()
{
        echo "<h2>System uptime</h2>"
        echo "<pre>"
        uptime
        echo "</pre>"

}       # end of show_uptime

drive_space()
{
        echo "<h2>Filesystem space</h2>"
        echo "<pre>"
        df
        echo "</pre>"

}       # end of drive_space

home_space()
{
        # Only the superuser can get this information

        if [ "$(id -u)" = "0" ]; then
                echo "<h2>Home directory space by user</h2>"
                echo "<pre>"
                echo "Bytes Directory"
                du -s /home/* | sort -nr
                echo "</pre>"
        fi

}       # end of home_space

write_page()
{
        cat <<- _EOF_
        <html>
                <head>
                <title>$TITLE</title>
                </head>
                <body>
                <h1>$TITLE</h1>
                <p>$TIME_STAMP</p>
                $(system_info)
                $(show_uptime)
                $(drive_space)
                $(home_space)
           </html>
_EOF_

}

usage()
{
        echo "usage: sysinfo_page [[[-f file ] [-i]] | [-h]]"
}

##### Main

interactive=1
filename=~/sysinfo_page.html

while [ "$1" != "" ]; do
        case $1 in
        -f | --file )           shift
                                filename=$1
                                ;;
        -i | --interactive )    interactive=1
                                ;;
        -h | --help )           usage
                                exit
                                ;;
        * )                     usage
                                exit 1
        esac
        shift
done

# Test code to verify command line processing

if [ "$interactive" = "1" ]; then

        response=
        echo -n  "Enter name of output file [$filename] > "
        read response
        if [ -n "$response" ]; then
                filename=$response
         fi

        if [ -f $filename ]; then
        echo -n "Output file exists. Overwrite? (y/n) > "
                read response
                if [ "$response" != "y" ]; then
                        echo "Exiting program."
                        exit 1
                fi
        fi
fi

braing

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