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2018-09-12remove spurious inclusion of libc.h for LFS64 ABI aliasesRich Felker1-2/+1
the LFS64 macro was not self-documenting and barely saved any characters. simply use weak_alias directly so that it's clear what's being done, and doesn't depend on a header to provide a strange macro.
2018-09-12overhaul internally-public declarations using wrapper headersRich Felker1-2/+0
commits leading up to this one have moved the vast majority of libc-internal interface declarations to appropriate internal headers, allowing them to be type-checked and setting the stage to limit their visibility. the ones that have not yet been moved are mostly namespace-protected aliases for standard/public interfaces, which exist to facilitate implementing plain C functions in terms of POSIX functionality, or C or POSIX functionality in terms of extensions that are not standardized. some don't quite fit this description, but are "internally public" interfacs between subsystems of libc. rather than create a number of newly-named headers to declare these functions, and having to add explicit include directives for them to every source file where they're needed, I have introduced a method of wrapping the corresponding public headers. parallel to the public headers in $(srcdir)/include, we now have wrappers in $(srcdir)/src/include that come earlier in the include path order. they include the public header they're wrapping, then add declarations for namespace-protected versions of the same interfaces and any "internally public" interfaces for the subsystem they correspond to. along these lines, the wrapper for features.h is now responsible for the definition of the hidden, weak, and weak_alias macros. this means source files will no longer need to include any special headers to access these features. over time, it is my expectation that the scope of what is "internally public" will expand, reducing the number of source files which need to include *_impl.h and related headers down to those which are actually implementing the corresponding subsystems, not just using them.
2013-02-20add mkostemp, mkstemps, and mkostemps functions and reorganize temp internalsRich Felker1-19/+2
based on patch contributed by Anthony G. Basile (blueness) some issues remain with the filename generation algorithm and other small bugs, but this patch has been sitting around long enough that I feel it's best to get it committed and then work out any remaining issues.
2011-02-19make mktemp match the historic behavior, and update functions that use itRich Felker1-2/+3
the historic mktemp is supposed to blank the template string on failure, rather than returning 0. just zero the first character so that mkstemp and mkdtemp can still retry with O(1) space requirement.
2011-02-19fix major bug created from copying mkdtemp logicRich Felker1-1/+1
2011-02-18major improvements to temp file name generatorRich Felker1-2/+3
use current time in nanoseconds and some potentially-random (if aslr is enabled) pointer values for the initial tempfile name generation, and step via a cheap linear prng on collisions. limit the number of retry attempts to prevent denial of service attacks even if an attacker can guess the filenames.
2011-02-18reformat mkstemp like mkdtempRich Felker1-7/+5
this is cleaner and makes it easy to impose a limit on the number of retries later if it seems desirable to do so.
2011-02-14ensure standard functions mk[sd]temp don't depend on removed function mktempRich Felker1-2/+3
2011-02-14begin namespace-cleanup of standard C headersRich Felker1-0/+1
2011-02-12initial check-in, version 0.5.0v0.5.0Rich Felker1-0/+26