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authorDenys Vlasenko <vda.linux@googlemail.com>2016-09-29 02:11:19 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2016-09-29 02:11:19 +0200
commit3b4d04b77eb5cfdb8ac6a799a3f3ccf1e455d0e7 (patch)
treef7486abff328ee79831a4c4ee6cc006a11006dc8 /testsuite/touch/touch-touches-files-after-non-existent-file
parent78c9c736ab13caec3f6c1032e39200fed5580f50 (diff)
downloadbusybox-3b4d04b77eb5cfdb8ac6a799a3f3ccf1e455d0e7.tar.gz
ash: input: Allow two consecutive calls to pungetc
Upstream commit: input: Allow two consecutive calls to pungetc The commit ef91d3d6a4c39421fd3a391e02cd82f9f3aee4a8 ([PARSER] Handle backslash newlines properly after dollar sign) created cases where we make two consecutive calls to pungetc. As we don't explicitly support that there are corner cases where you end up with garbage input leading to undefined behaviour. This patch adds explicit support for two consecutive calls to pungetc. Reported-by: Jilles Tjoelker <jilles@stack.nl> Reported-by: Juergen Daubert <jue@jue.li> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> In bbox case, bashism >& may need two pungetc() too. function old new delta pgetc 514 555 +41 pushstring 114 144 +30 basepf 52 76 +24 popstring 134 151 +17 parse_command 1584 1585 +1 pungetc 12 9 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/1 up/down: 113/-3) Total: 110 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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