#!/bin/bash
# system_page - A script to produce an system information HTML file
##### Constants
TITLE="System Information for $HOSTNAME"
RIGHT_NOW=$(date +"%x %r %Z")
TIME_STAMP="Updated on $RIGHT_NOW by $USER"
##### Functions
function system_info
{
echo "<h2>System Information</h2>"
echo "<pre>"
uname -a
echo "</pre>"
}
function show_uptime
{
echo "<h2>System uptime</h2>"
echo "<pre>"
uptime
echo "</pre>"
}
function drive_space
{
echo "<h2>Filesystem space</h2>"
echo "<pre>"
df -h
echo "</pre>"
}
function home_space
{
echo "<h2>Home directory space by user</h2>"
echo "<pre>"
echo "Bytes Directory"
du -s /home/* | sort -nr
echo "</pre>"
}
##### Main
cat <<- _EOF_
<html>
<head>
<title>$TITLE</title>
</head>
<body>
<h1>$TITLE</h1>
<p>$TIME_STAMP</p>
$(system_info)
$(show_uptime)
$(drive_space)
$(home_space)
</body>
</html>
_EOF_
===========================
===========================
Error exit function
=========================
#!/bin/bash
# A slicker error handling routine
# I put a variable in my scripts named 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 $0)
function error_exit
{
# ----------------------------------------------------------------
# Function for exit due to fatal program error
# Accepts 1 argument:
# string containing descriptive error message
# ----------------------------------------------------------------
echo "${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."
=======================================================
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