A question for the AWK wizards
Hi all,
I have a shell script which is called with an arbitrary
message argument. Punctuation excludes * ? | chars.
It processes it via an AWK command line 'script' and dumps the
result in a file for the SMS sender...
Nice and simple.
Except that the AWK script seems to duplicate the last character or two
in the message. Everything else in the 200 odd lines of shell scripts
surrounding this function run just fine, and this bit runs too,
but this tiny thing is _VERY_ annoying.
The shell code is listed below.
Please teach me what bit I missed (C and TCL are my forte, not AWK)
cheers
mjt
--8--
# sourced into other scripts that need to SMS
# !! 4 space indents, NOT tabs !!
#
# generate the sms message
# the awk code forces the message to be 160 chars
sendsms() {
msg=$1
case ${sms_enable} in
[Yy][Ee][Ss])
for phone in ${phonelist}
do
tmpfile=`mktemp -t sms`
echo ${phone} ${tmpfile}
${AWK} '{ printf %-0.159s, $0 }' ${tmpfile} EOF2
`echo $msg`
EOF2
mv ${tmpfile} ${gsmspool_dir}
done
;;
*)
;;
esac
}
--8--
Murray Taylor
Special Projects Engineer
Bytecraft Systems
P: +61 3 8710 2555
F: +61 3 8710 2599
D: +61 3 9238 4275
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Re: A question for the AWK wizards
On 2006-07-25 21:43, Murray Taylor [EMAIL PROTECTED] wrote:
Hi all,
I have a shell script which is called with an arbitrary message
argument. Punctuation excludes * ? | chars.
It processes it via an AWK command line 'script' and dumps the result
in a file for the SMS sender...
Nice and simple.
Except that the AWK script seems to duplicate the last character or
two in the message. Everything else in the 200 odd lines of shell
scripts surrounding this function run just fine, and this bit runs
too, but this tiny thing is _VERY_ annoying.
The shell code is listed below.
Please teach me what bit I missed (C and TCL are my forte, not
AWK)
--8--
# sourced into other scripts that need to SMS
# !! 4 space indents, NOT tabs !!
#
# generate the sms message
# the awk code forces the message to be 160 chars
sendsms() {
msg=$1
case ${sms_enable} in
[Yy][Ee][Ss])
for phone in ${phonelist}
do
tmpfile=`mktemp -t sms`
echo ${phone} ${tmpfile}
${AWK} '{ printf %-0.159s, $0 }' ${tmpfile} EOF2
`echo $msg`
EOF2
mv ${tmpfile} ${gsmspool_dir}
done
;;
*)
;;
esac
}
The above has a weird construct which can be simplified a bit:
| ${AWK} '{ printf %-0.159s, $0 }' ${tmpfile} EOF2
| `echo $msg`
| EOF2
You can write this as:
| echo ${msg} | ${AWK} '{printf %-0.159s, $0}' ${tmpfile}
Are you deliberately avoiding to append a newline character to the
output of ${AWK} above? See the output of the two commands below,
as it's filtered through hd(1) utility.
| $ echo foo | awk '{ printf %-0.159s, $0 }' | hd
| 66 6f 6f |foo|
| 0003
| $ echo foo | awk '{ printf %-0.159s\n, $0 }' | hd
| 66 6f 6f 0a |foo.|
| 0004
| $
There is no problem with this part of the scripts you posted though.
They should work as expected. I'd probably look elsewhere for a bug
that causes the character duplication.
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Re: A question for the AWK wizards
in message [EMAIL PROTECTED],
wrote Murray Taylor thusly...
# generate the sms message
# the awk code forces the message to be 160 chars
...
tmpfile=`mktemp -t sms`
echo ${phone} ${tmpfile}
${AWK} '{ printf %-0.159s, $0 }' ${tmpfile} EOF2
`echo $msg`
EOF2
As it is, any line longer than 159 characters will just overflow.
You need to use substr() not awk to shorten a line. Even after that
modification, that won't solve your actual problem as the awk script
will just shorten EACH line (when record separator is newline), not
the whole output.
There are ports which seems to do what you want to do.
- Parv
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Re: A question for the AWK wizards
On Tue, Jul 25, 2006 at 10:51:02AM -0400, Parv wrote: As it is, any line longer than 159 characters will just overflow. You need to use substr() not awk to shorten a line. Even after that modification, that won't solve your actual problem as the awk script will just shorten EACH line (when record separator is newline), not the whole output. There are ports which seems to do what you want to do. Ports? How about dd? Should be as simple as piping it thru dd count=159 but then again I admit to having not paid full attention to this thread. -- David Kelly N4HHE, [EMAIL PROTECTED] Whom computers would destroy, they must first drive mad. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: A question for the AWK wizards
in message [EMAIL PROTECTED], wrote Parv thusly... You need to use substr() not awk to shorten a line. ` ^ ^ ^ ^ ^ ^ ^ ^ ` ^ ^ ^ ^ ^ ^ ^ ^ Dang it! I meant to use the substr() function in awk. - Parv -- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
