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Full Discussion: bash logging al $() command lines
Top Forums Shell Programming and Scripting bash logging al $() command lines Post 302580787 by DGPickett on Friday 9th of December 2011 03:11:26 PM
Old 12-09-2011
I was testing how the restart of daemons reacted to a shortage of mysql connections, so I drop the limit, kill a daemon, wait for new messages, then raise the limit, wait for the message count to quiesce and move to the next daemon. It works fine except for the bash blowing out junk from $() onto the console. I guess I am singularly cursed.

Maybe it comes from the ENV?
Code:
$ set
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="00" [2]="15" [3]="1" [4]="release" [5]="x86_64-redhat-linux-gnu")
BASH_VERSION='3.00.15(1)-release'
COLORS=/etc/DIR_COLORS.xterm
COLUMNS=81
CYCLOPS_HOME=/var/xxx/6_1_22_rc4
DIRSTACK=()
EDITOR=vim
EUID=10103
GROUPS=()
G_BROKEN_FILENAMES=1
HISTFILE=/var/xxx/.bash_history
HISTFILESIZE=1000000
HISTSIZE=1000000
HOME=/var/xxx
HOSTNAME=xxx.yyy.zzz
HOSTTYPE=x86_64
IFS=$' \t\n'
INPUTRC=/etc/inputrc
LANG=en_US.UTF-8
LESSOPEN='|/usr/bin/lesspipe.sh %s'
LINES=25
LOGNAME=xxx
LS_COLORS='no=00:fi=00:di=00;34:ln=00;36:pi=40;33:so=00;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:*.bat=00;32:*.sh=00;32:*.csh=00;32:*.tar=00;31:*.tgz=00;31:*.arj=00;31:*.taz=00;31:*.lzh=00;31:*.zip=00;31:*.z=00;31:*.Z=00;31:*.gz=00;31:*.bz2=00;31:*.bz=00;31:*.tz=00;31:*.rpm=00;31:*.cpio=00;31:*.jpg=00;35:*.gif=00;35:*.bmp=00;35:*.xbm=00;35:*.xpm=00;35:*.png=00;35:*.tif=00;35:'
MACHTYPE=x86_64-redhat-linux-gnu
MAIL=/var/spool/mail/c64adm
MAILCHECK=60
OLDPWD=/var/c64adm
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/home2/xxx/6_1_22_rc4/test-local/bin:/home2/xxx/6_1_22_rc4/mon-local/bin:/home2/xxx/6_1_22_rc4/host-local/bin:/home2/xxx/6_1_22_rc4/local/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home2/xxx/bin:/sbin:/usr/sbin:/home/yyy/bin
PIPESTATUS=([0]="0")
PPID=19816
PS1='\[\e]0;\u@\h: \w\a\]\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
PS2='> '
PS4='+ '
PWD=/var/xxx/6_1_22_rc4
SHELL=/bin/bash
SHELLOPTS=braceexpand:hashall:histexpand:history:interactive-comments:monitor:vi
SHLVL=1
SSH_CLIENT='::ffff:192.168.9.73 46673 22'
SSH_CONNECTION='::ffff:192.168.9.73 46673 ::ffff:192.168.9.109 22'
SSH_TTY=/dev/pts/0
SUPPORTED=en_US.UTF-8:en_US:en
TERM=xterm
UID=10103
USER=xxx
_=--no-diag-kern
f=local/bin/cyclops64-linux-elf-sim
i=host-local/var/log/swras-master.log

I never heard of the input generating shell caring that it was feeding mysql. I suspect the messages are on stderr or tty, since they cannot pipe through mysql! It is a very obnoxious thing for a shell to do. Maybe I have to take it to bash-dev-land.
 

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LEARN ABOUT OSX

pcastctl

pcastctl(8)						    BSD System Manager's Manual 					       pcastctl(8)

NAME

     pcastctl -- Podcast Producer daemons control interface

SYNOPSIS

     pcastctl status target on|off|start|stop|restart

OPTIONS

     The available options are as follows:

     status			    print status of running daemons

     target			    affect agent or server daemon

     start|stop|restart 	    explicitly start/stop/restart daemon.  Note that 'restart' will kill all instances of a given daemon, as will
				    'stop' if none is specified in the pid file.

RETURN VALUES

     0 Completed succesfully.

     1 Action failed

     10 Not run as root.

     50 Target not recognized: use 'a', or 's'.

     51 Action not recognized: use start|stop|restart

     52 Executables not found; may need to reinstall Podcast Producer.

     53 Process directory not found; may need to reinstall Mac OS X.

     54 Timeout waiting for action to complete.

     55 Launchd manipulation failure.

FILES

     /usr/libexec/podcastproducer/pcastagentd
	     Podcast Producer agent daemon

     /usr/share/podcastproducer/pcastserverd
	     Podcast Producer server daemon

     /var/run/pcastagentd.pid
	     Podcast Producer agent process ID

     /var/run/pcastserverd.pid
	     Podcast Producer server process ID

     /System/Library/LaunchDaemons/com.apple.pcastagentd.plist
	     Launchd agent daemon control file

     /System/Library/LaunchDaemons/com.apple.pcastserverd.plist
	     Launchd server daemon control file

EXAMPLES

     status of Podcast Producer agent daemon

	   $ pcastctl agent status

     edit launchd configuration to launch server on system startup

	   $ pcastctl server on

DIAGNOSTICS

     Warning: Warning: ## copies of (pcastagentd|pcastserverd) already running

     Trying to launch another daemon when one or more already running; will usually succeed, but may cause unpredictable behavior.
     See also RETURN VALUES, above.

ERRORS

     Error: failed to launch (executable)

     Tried to start/restart a give daemon, but failed.

     Error: process 'executable' not currently running

     Tried to kill a process which did not exist.

SEE ALSO

     pcast(1) launchd(8)

HISTORY

     This program was first introduced in Mac OS X 10.5 "Leopard".  It was inspired by xgridctl(8).

BUGS

     pcastctl(8) uses kill -TERM to allow the daemons a chance to die gracefully; there is currently no way to force a kill -KILL.

     Bug reports can be sent to bugreport.apple.com

     Feedback can be sent to podcastproducer@apple.com

Mac OS								September 29, 2004							    Mac OS
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