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Full Discussion: Script to send alert if any changes are made in crontab.
Top Forums Shell Programming and Scripting Script to send alert if any changes are made in crontab. Post 302525913 by ygemici on Sunday 29th of May 2011 04:42:52 PM
Old 05-29-2011
maybe you could try something like this.
Code:
x=$(crontab -l >/tmp/crXc)
sleep 1800 #(wait for half-hour )
y=$(crontab -l >/tmp/crXy)
if [[ ! -z $(comm -3 $x $y) ]] ; then echo "crontab entry(s) is maybe changed .." ; 
echo -e "$(date "+%F %H:%M:%S") in\n --new crontab--\n`more $x` \n\nhalf an hour ago\n --old crontab--\n`more $y`"; fi
rm -f $x $y

regards
ygemici
 

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LEARN ABOUT NETBSD

alert

alert(3alleg4)                                                    Allegro manual                                                    alert(3alleg4)

NAME

       alert - Displays a popup alert box. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int alert(const char *s1, *s2, *s3, const char *b1, *b2, int c1, c2);

DESCRIPTION

       Displays  a  popup  alert  box,  containing  three lines of text (s1-s3), and with either one or two buttons. The text for these buttons is
       passed in `b1' and `b2' (`b2' may be NULL), and the keyboard shortcuts in `c1' and `c2' as ASCII value. Example:

          if (!exists(CONFIG_FILE))
             alert(CONFIG_FILE, "not found.", "Using defaults.",
                   "&Continue", NULL, 'c', 0);

RETURN VALUE

       Returns 1 or 2 depending on which button was clicked. If the alert is dismissed by pressing ESC when ESC is not one of the keyboard  short-
       cuts, it treats it as a click on the second button (this is consistent with the common "Ok", "Cancel" alert).

SEE ALSO

       alert3(3alleg4), gui_fg_color(3alleg4), exgui(3alleg4), expackf(3alleg4), exspline(3alleg4)

Allegro                                                            version 4.4.2                                                    alert(3alleg4)
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