self-mailer.sh

一本完整的描述Unix Shell 编程的工具书的所有范例

#!/bin/sh
# self-mailer.sh: Self-mailing script

adr=${1:-`whoami`}     # Default to current user, if not specified.
#  Typing 'self-mailer.sh [e-mail]'
#+ sends this script to that addressee.
#  Just 'self-mailer.sh' (no argument) sends the script
#+ to the person invoking it, for example, [e-mail].
#
#  For more on the ${parameter:-default} construct,
#+ see the "Parameter Substitution" section
#+ of the "Variables Revisited" chapter.

# ============================================================================
  cat $0 | mail -s "Script \"`basename $0`\" has mailed itself to you." "$adr"
# ============================================================================

# --------------------------------------------
#  Greetings from the self-mailing script.
#  A mischievous person has run this script,
#+ which has caused it to mail itself to you.
#  Apparently, some people have nothing better
#+ to do with their time.
# --------------------------------------------

echo "At `date`, script \"`basename $0`\" mailed to "$adr"."

exit 0