From mboxrd@z Thu Jan 1 00:00:00 1970 From: AD Marshall Subject: [Solution] how-to: one command for repeat OR iterate shell OR bash command delay OR interval Date: Tue, 19 Jul 2005 10:24:34 +0700 Message-ID: <200507191024.36528.admarshall@gmail.com> References: <200507171157.35066.admarshall@gmail.com> <200507171307.46798.admarshall@gmail.com> <200507171316.10728.admarshall@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <200507171316.10728.admarshall@gmail.com> Content-Disposition: inline Sender: linux-newbie-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="iso-8859-1" To: linux-newbie@vger.kernel.org Cc: John Kelly I worked out a cheap, if buggy, hack for what i wanted this morning. =A0= But thanks all the same... =A0 In case you're interested: am@[sh]$ rewatch 2 'cat /proc/loadavg' 0.51 0.36 0.65 1/121 9072 09:56:08 0.51 0.36 0.65 1/121 9083 09:56:10 0.47 0.36 0.65 1/121 9088 09:56:13 am@[sh]$ rewatch 2 'cat /proc/loadavg' 'mozilla' | tee rewatch-mozilla 0.43 0.35 0.65 1/121 9100 09:56:20 am =A0 =A0 =A0 32106 =A00.0 =A00.3 =A0 3832 =A0 988 ? =A0 =A0 =A0 =A0S = =A0 =A007:37 =A0 0:00 /bin/sh /usr/bin/mozilla am =A0 =A0 =A0 32112 10.0 25.7 141688 66084 ? =A0 =A0 =A0 =A0Sl =A0 07:= 37 =A013:54 /opt/mozilla/lib/mozilla-bin 0.40 0.34 0.64 3/121 9109 09:56:22 am =A0 =A0 =A0 32106 =A00.0 =A00.3 =A0 3832 =A0 988 ? =A0 =A0 =A0 =A0S = =A0 =A007:37 =A0 0:00 /bin/sh /usr/bin/mozilla am =A0 =A0 =A0 32112 10.0 25.7 141688 66092 ? =A0 =A0 =A0 =A0Sl =A0 07:= 37 =A013:54 /opt/mozilla/lib/mozilla-bin am@[sh]$ cat ~/bin/rewatch #!/bin/sh # rewatch, v. 0.01 # # Usage: rewatch [process-to-watch] # =A0 n: seconds between repetitions # =A0 cmdline: command-line to repeat # =A0 process-to-watch: process for which "ps aux" info is to be displa= yed # # Purpose: repeat and, optionally, watch and record the "ps aux" info o= f # that or any other process # # Bkgd: original purpose was to be able to input a command-line (in sin= gle # quotes) along with an interval in seconds for its repetion and print = a # list of its stdouts labelled by the times they were printed until # is hit, and be able to capture all the output to stdout or a file. # # initial use was for watching and recording load averages as programs = were # loaded, eg, "re_watch 2 'cat /proc/loadavg' konqueror" # # Future: unknown # # Known Bugs: no input validation or user feedback for input errors # # Of course, bash operators will have to be properly quoted or escaped = or # not... -- which i still don't clearly understand n=3D$1 cmdline=3D$2 proc2watch=3D$3 if test -z "$3" then =A0 while true ; do echo $( $cmdline && echo "$( date +%H:%M:%S )" ) ; = sleep $n ; done else while true ; do echo $( $cmdline && echo "$( date +%H:%M:%S )" ) ; echo= "$( ps aux | grep -vE "(rewatch |grep |tee )" | grep $proc2watch )" ; = sleep $n ; done fi am@[sh]$ On Sunday 17 July 2005 13:16, AD Marshall wrote: > my apologies, if necessary. but it's way past lunchtime in saigon an= d > i'm STARVING. i'll check back later. thanx again. - best, andi >=20 > On Sunday 17 July 2005 13:07, AD Marshall wrote: > > On Sunday 17 July 2005 12:35, John Kelly wrote: > > > Hi, > > > On Sun, 17 Jul 2005 11:57:34 +0700 > > > AD Marshall wrote: > > >=20 > > > > Is there already one bash command to do what the following scri= pt > > > > does (poorly or incompletely), ie repeat "command" indefinitely > > > > every "x" seconds: > > > >=20 > > > > #!/bin/sh > > > > # usage: repeat [x] > > > > while true ; do $2 ; sleep $1 ; done > > > >=20 > > > > < rest deleted >=20 > > >=20 > > > The watch command might tbe what you want. > > > Or maybe not, if you don't want anything output to screen. > > > =20 > > > Try man watch for details. > > >=20 > > > > Ya. Thanks. I'd (long) forgotten about "watch". =20 > >=20 > > but, actually, i should be more specific. what i'm trying to do is=20 > > something like this -- though i'm screwing up on quoting or somethi= ng > >=20 > > am@[~]$ repeat 2 "echo $(cat /proc/loadavg ; date +%H:%m:%S)" > > 0.05 0.14 0.24 6/127 27711 12:07:29 > > 0.05 0.14 0.24 6/127 27711 12:07:29 > > 0.05 0.14 0.24 6/127 27711 12:07:29 > >=20 > > as you can see, only one instance of load average and time are repe= ated. > > i want a running record that can be redirected to a file > >=20 > > i just tinkered with backslashes, back-quotes, double-quotes and=20 > > single-quotes, but all the quoting stuff still confuses me. > >=20 > > and, imho, i would have thought someone would have written a simple= =20 > > tool to do this ages ago. no? > >=20 > > thanx again, > > andi > >=20 >=20 --=20 AD Marshall Tel: +84 (0)903871313 eM: admarshall@gmail.com Web: http://h0lug.sourceforge.net Zone: ICT (IndoChina Time; GMT/UTC+7) - To unsubscribe from this list: send the line "unsubscribe linux-newbie"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs