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2016-07-14Only include limits.h when actually usedNatanael Copa
The __extension__ seems to trigger a bug in gcc when there are no identifier specified afterwards. Testcase: echo "#include <stdlib.h>" > try.c && cc -O0 -c try.c try.c:2:0: error: expected identifier or '(' at end of input With -O2 it does not happen. We work around this by only pulling in limits.h when we actually need the PATH_MAX. Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
2015-07-16Only crash on overflow for realpath()sin
2015-06-25Add __extension__ mark to include_next to silence -pedanticSteven Barth
Signed-off-by: Steven Barth <steven@midlink.org>
2015-06-03Use namespace-safe macro, param and variable namesTrutz Behn
2015-05-13Add LICENSE headersin
2015-05-13Add fortify_fn() helper in fortify-headers.hsin
2015-05-07Minor style fixsin
2015-05-07fix realpath when stdlib.h is included before limits.hNatanael Copa
If program includes stdlib.h before limits.h without _XOPEN_SOURCE, _GNU_SOURCE or _BSD_SOURCE explicitly set, then will it always trigger the trap with musl libc. This is becase stdlib.h will pull in features.h which will set _GNU_SOURCE. This means that the fortify stdlib.h will not include limits.h but it will still trigger the fortified realpath(), but without PATH_MAX set. We fix this by including system stdlib.h before testing if limits.h should be included. Since PATH_MAX is known at compile time we can also error at compile time, instead of compiling a broken realpath().
2015-03-14Use __typeof__ to in part avoid replicating function typesTrutz Behn
2015-03-14Add __artificial__ to aid in debuggingsin
2015-03-13Restore C++ supportsin
2015-03-13Rework fortify implementation to use extern inlinesin
Overriding functions with macros is legal in C but a lot of software is not prepared for it. Use the extern inline method to achieve the same result.
2015-03-11Put include guards in the reserved namespaceTrutz Behn
fortify-headers is considered part of the implementation.
2015-03-11Ignore C++ for nowsin
It is not legal to override standard functions using macros in C++. We may have to revisit this in the future.
2015-03-11Add ifdef guards for C++ codesin
2015-02-28Style fixsin
2015-02-28__fortify_realpath() should trap if PATH_MAX is not definedsin
This is currently done only if the pointer is non-NULL.
2015-02-24Add realpath() checksin