Add error checking for poorly-formed crossystem args
R=petkov@chromium.org
BUG=chromium-os:13322
TEST=manual
The following command lines should cause crossystem to fail with a
warning about a poorly formed parameter:
crossystem ''
crossystem '=cros_debug'
crossystem '?cros_debug'
The following command line should warn that you can't use both = and ?:
crossystem cros_debug?=0
(that is, it warns, not just compares with '=0')
The following should print 'UNEQUAL'
crossystem cros_debug? || echo UNEQUAL
(because it's comparing cros_debug with an empty string)
Review URL: http://codereview.chromium.org/6718012
Change-Id: I2e2851515f4914b16aba64065600fb92d9ad1a63
(cherry picked from commit f27583f08361522909e49155d8b14671f644ec85)
Review URL: http://codereview.chromium.org/6675014
1 file changed
