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Full Discussion: Note: environment variables within awk
Top Forums Shell Programming and Scripting Note: environment variables within awk Post 303030841 by stomp on Sunday 17th of February 2019 10:20:08 AM
Old 02-17-2019
The most important thing for me was here to have a version of a command with an option that is as short as possible, so it's convenient to use it.

And on a second thought, I think environment variables are not such a good way to use in general. I appreciate explicit parameter handover more since external dependencies and data access is not hiden in the code but directly visible at a program call.

And I would better write such script in a single file now:

Code:
#!/bin/sh

[ "$1" = "-q" ] && DEBUG=0 || DEBUG=1
mysql -e 'SHOW SLAVE STATUS \G' | awk -v DEBUG=${DEBUG} '

#
# awk program here
#
...
'

 

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LEARN ABOUT HPUX

systemd-debug-generator

SYSTEMD-DEBUG-GENERATOR(8)				      systemd-debug-generator					SYSTEMD-DEBUG-GENERATOR(8)

NAME

       systemd-debug-generator - Generator for enabling a runtime debug shell and masking specific units at boot

SYNOPSIS

       /lib/systemd/system-generators/systemd-debug-generator

DESCRIPTION

       systemd-debug-generator is a generator that reads the kernel command line and understands three options:

       If the systemd.mask= option is specified and followed by a unit name, this unit is masked for the runtime, similar to the effect of
       systemctl(1)'s mask command. This is useful to boot with certain units removed from the initial boot transaction for debugging system
       startup. May be specified more than once.

       If the systemd.wants= option is specified and followed by a unit name, a start job for this unit is added to the initial transaction. This
       is useful to start one or more additional units at boot. May be specified more than once.

       If the systemd.debug_shell option is specified, the debug shell service "debug-shell.service" is pulled into the boot transaction. It will
       spawn a debug shell on tty9 during early system startup. Note that the shell may also be turned on persistently by enabling it with
       systemctl(1)'s enable command.

       systemd-debug-generator implements systemd.generator(7).

SEE ALSO

       systemd(1), systemctl(1), kernel-command-line(7)

systemd 237														SYSTEMD-DEBUG-GENERATOR(8)
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