Mercurial > hg > toybox
view kconfig/lxdialog/BIG.FAT.WARNING @ 1613:96aa7ec74936 draft
Fix yet another sed bug.
The s/// command would copy the \ of substitutions before deciding what to
do with them (generally overwriting the \ with the new data). When the
substitution was A) at the very end of the new string, B) resolved to nothing,
it could leave a trailing \ that didn't belong there and didn't get overwritten
because the "copy trailing data" part that copies the original string's null
terminator already happened before the \ overwrote it.
The ghostwheel() function restarts regexes after embedded NUL bytes, but
if the string it's passed is _longer_ than the length it's told then it
gets confused (and it means we're off the end of our allocation so segfaults
are likely).
Fix: test for \ first and move the "copy byte" logic into an else case.
author | Rob Landley <rob@landley.net> |
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date | Mon, 15 Dec 2014 03:34:55 -0600 |
parents | 4d21d59f3206 |
children |
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This is NOT the official version of dialog. This version has been significantly modified from the original. It is for use by the Linux kernel configuration script. Please do not bother Savio Lam with questions about this program.