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Kyle Blatter 3bfc7f1b20 Refactor arc_summary to simplify -p processing
The -p option is used to specify a specific page of output to be
displayed. If omitted, all output pages would be displayed.

arc_summary, as it stood, had really kludgy processing code for
processing the -p option. It relied on a try-except block which was
treated as an if statement and in normal operation would fail any time a
user didn't specify the -p option on the command line. When the
exception was thrown, the script would then display all output pages.
This happened whether the -p option was omitted or malformed. Thus, in
the principle use case, an exception would be raised in order to run the
script as desired. The same except code would be called regardless of
the exception, however, and malformed -p arguments would also cause the
script to execute.

Additionally, this required the function which handles the case where
all output pages were to be displayed, _call_all, to be potentially
called from several locations within main.

This commit refactors the option processing code to simplify it and make
it easier to catch runtime errors in the script. This is done by
specializing the try-except block to only have an exception when the -p
argument is malformed. When the -p option is correctly selected by the
user, it calls a function in the unSub array directly, which will only
display one page of output.

Finally in the context of this refactoring the page breaks have been
removed.  Pages seem to have been added into the output in the FreeNAS
version of the script. This patch removes pages from the output to more
closely resemble the freebsd version of the script.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Kyle Blatter <kyleblatter@llnl.gov>
Signed-off-by: Ned Bass <bass6@llnl.gov>
2015-01-28 10:59:19 -08:00
cmd Refactor arc_summary to simplify -p processing 2015-01-28 10:59:19 -08:00
config Don't use AC_LANG_SOURCE for conftest.h source 2015-01-06 16:53:30 -08:00
contrib Add bash completions by Aneurin Price. 2014-08-06 15:03:28 -07:00
dracut Amend Dracut module to export ZFS root on shutdown 2014-10-07 10:20:56 -07:00
etc Improve systemd script to not leave stale sharetab 2014-12-18 09:54:56 -08:00
include Revert "SA spill block cache" 2015-01-16 14:41:28 -08:00
lib Mark IO pipeline with PF_FSTRANS 2015-01-16 14:28:05 -08:00
man Document zfs_flags module parameter 2015-01-07 15:50:49 -08:00
module Fix removal of SA in sa_modify_attrs() 2015-01-21 16:35:14 -08:00
rpm Fix typo in %post scriptlet lines 2014-12-18 18:38:33 -08:00
scripts Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -08:00
udev Open pools asynchronously after module load 2013-07-03 09:24:38 -07:00
.gitignore Ignore *.{deb,rpm,tar.gz} files in the top directory. 2013-04-24 16:18:59 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add a pkgconfig file 2014-08-28 07:59:43 -07:00
copy-builtin Consistent menuconfig name 2012-08-26 13:49:37 -07:00
COPYRIGHT Refresh links to web site 2013-03-06 15:46:41 -08:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Kernel header installation should respect --prefix 2014-10-28 09:37:06 -07:00
META Make license compatibility checks consistent 2014-10-17 14:58:38 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
zfs-script-config.sh.in Initial implementation of zed (ZFS Event Daemon) 2014-04-02 13:10:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

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