at reminder script Post: 302561633

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Homework and Emergencies Homework & Coursework Questions at reminder script Post 302561633 by Corona688 on Tuesday 4th of October 2011 04:23:26 PM

10-04-2011

Registered User

"$" variables are likely being substituted before the script is run, so $inputline never changes. You have to escape it with \.

This !! business is strange as well. On my system, that tells it to end the here document on 'man write', since that's the command I ran last.

Code:

at -k $TIME <<EOF
who | cut -c1-20 | grep $LOGNAME | cut -c12-20 | cat > ~/tmp
while read inputline
do
        write $LOGNAME \$inputline < ~/Msgs/message.$$ #|| mail \$inputline < ~/Msgs/message.$$
done < ~/tmp
rm -r ~/Msgs
rm -r ~/tmp
exit 0
EOF

That's a useless use of cat, by the way. Any command can be redirected to file, not just cat -- so leave off the cat and send your last cut into a file, cut -c12-20 > ~/tmp

That's also a useless use of a temp file. You can just feed cut's output directly into the while loop with no intervening file: a | b | c | while read LINE ; do stuff ; done

You never did redirect write's stderr to >dev/null like write ... 2>/dev/null to throw away the messages.

Show me what your who output looks like, and I'll find a more elegant way to get what you want than cut | grep | cut | cat, too.

Corona688

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cut-diff

CUT-DIFF(1)							  Cutter's manual						       CUT-DIFF(1)

NAME

       cut-diff - show difference between 2 files with color

SYNOPSIS

       cut-diff [option ...] file1 file2

DESCRIPTION

       cut-diff is a diff command that uses diff feature in Cutter. It shows difference with color.

       It's recommended that you use a normal diff(1) when you want to use with patch(1) or you don't need color.

OPTIONS

       --version
	      cut-diff shows its own version and exits.

       -c [yes|true|no|false|auto], --color=[yes|true|no|false|auto]
	      If  'yes' or 'true' is specified, cut-diff uses colorized output by escape sequence. If 'no' or 'false' is specified, cut-diff never
	      use colorized output. If 'auto' or the option is omitted, cut-diff uses colorized output if available.

	      The default is auto.

       -u, --unified
	      cut-diff uses unified diff format.

       --context-lines=LINES
	      Shows diff context around LINES.

	      All lines are shown by default. When unified diff format is used, 3 lines are shown by default.

       --label=LABEL, -L=LABEL
	      Uses LABEL as a header label. The first--label option value is used as file1's label and the second --label  option  value  is  used
	      asfile2's label.

	      Labels are the same as file names by default.

EXIT STATUS

       The exit status is 0 for success, non-0 otherwise.

       TODO: 0 for non-difference, 1 for difference and non-0 for errors.

EXAMPLE

       In the following example, cut-diff shows difference between file1 and file2:
	   % cut-diff file1 file2

       In the following example, cut-diff shows difference between file1 and file2 with unified diff format:
	   % cut-diff -u file1 file2

SEE ALSO

       diff(1)

Cutter								   February 2011						       CUT-DIFF(1)