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authorRon Yorston <rmy@frippery.org>2015-07-01 16:45:40 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2015-07-13 03:50:27 +0200
commit0e056f7e9efcebbbb85444221e141b37d3ab79e6 (patch)
tree99836b8ecfbf80cea732c709eebc1304a762d185 /shell/README
parent97f2f7ca7fe10783a592087df989a7f394492fa1 (diff)
downloadbusybox-0e056f7e9efcebbbb85444221e141b37d3ab79e6.tar.gz
ash: remove parsebackquote flag
Commit 503a0b8 from git://git.kernel.org/pub/scm/utils/dash/dash.git by Herbert Xu says: >The parsebackquote flag is only used in a test where it always has the >value zero. So we can remove it altogether. The first statement is incorrect: parsebackquote is non-zero when backquotes (as opposed to $(...)) are used for command substitution. It is possible for the test to be executed with parsebackquote != 0 in that case. The test is question checks whether quotes have been closed, raising the error "unterminated quoted string" if they haven't. There seems to be no good reason to allow unclosed quotes within backquotes. Bash, hush and dash (after commit 503a0b8) all treat the following as an error: XX=`"pwd` whereas BusyBox ash doesn't. It just ignores the unclosed quote and executes pwd. So, parsebackquote should be removed but not for the reason stated. function old new delta parsebackquote 1 - -1 readtoken1 3222 3182 -40 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-41) Total: -41 bytes Signed-off-by: Ron Yorston <rmy@frippery.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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