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2018-09-12remove spurious inclusion of libc.h for LFS64 ABI aliasesRich Felker-6/+3
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.
2018-09-12reduce spurious inclusion of libc.hRich Felker-1/+0
libc.h was intended to be a header for access to global libc state and related interfaces, but ended up included all over the place because it was the way to get the weak_alias macro. most of the inclusions removed here are places where weak_alias was needed. a few were recently introduced for hidden. some go all the way back to when libc.h defined CANCELPT_BEGIN and _END, and all (wrongly implemented) cancellation points had to include it. remaining spurious users are mostly callers of the LOCK/UNLOCK macros and files that use the LFS64 macro to define the awful *64 aliases. in a few places, new inclusion of libc.h is added because several internal headers no longer implicitly include libc.h. declarations for __lockfile and __unlockfile are moved from libc.h to stdio_impl.h so that the latter does not need libc.h. putting them in libc.h made no sense at all, since the macros in stdio_impl.h are needed to use them correctly anyway.
2018-09-12overhaul internally-public declarations using wrapper headersRich Felker-14/+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.
2018-09-12make mkostemps source file include the header for its declarationRich Felker-0/+1
2014-10-06ignore access mode bits of flags in mkostemps and functions that use itRich Felker-0/+1
per the text accepted for inclusion in POSIX, behavior is unspecified when any of the access mode bits are set. since it's impossible to consistently report this usage error (O_RDONLY could not be detected since its value happens to be zero), the most consistent way to handle them is just to ignore them. previously, if a caller erroneously passed O_WRONLY, the resulting access mode would be O_WRONLY|O_RDWR, which has the value 3, and this resulted in a file descriptor which rejects both read and write attempts when it is subsequently used.
2013-12-12include cleanups: remove unused headers and add feature test macrosSzabolcs Nagy-8/+2
2013-09-04fix typo in comment in __randnameRich Felker-1/+1
2013-08-02fix (deprecated) mktemp logic and update it to match other temp functionsRich Felker-4/+11
the access function cannot be used to check for existence, because it operates using real uid/gid rather than effective to determine accessibility; this matters for the non-final path components. instead, use stat. failure of stat is success if only the final component is missing (ENOENT) and otherwise is failure.
2013-08-02remove (no longer useful) namespace-protected __mktemp symbolRich Felker-4/+1
2013-08-02make mkdtemp and mkstemp family leave template unchanged on failRich Felker-13/+18
also refactor mkdtemp based on new shared temp code, removing dependency on the deprecated mktemp, whose behavior made this logic more difficult.
2013-02-20use memcmp instead of str[n]cmp for temp function XXXXXX checkingRich Felker-2/+2
2013-02-20fix error cases in mkostemps coreRich Felker-6/+3
1. wrong return value and missing errno for negative suffix len 2. failure to catch suffix len > strlen 3. remove unwanted clearing of input string in invalid case
2013-02-20remove leftover unused variable in mktemp after refactoringRich Felker-1/+0
2013-02-20add mkostemp, mkstemps, and mkostemps functions and reorganize temp internalsRich Felker-29/+83
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.
2011-07-28remove ugly prng from mk*temp and just re-poll time on retryRich Felker-6/+5
2011-07-28eliminate mk*temp dependency on snprintfRich Felker-3/+4
this helps some tiny programs be even more tiny, and barly increases code size even if both are used.
2011-06-12another return value fix for mktemp...Rich Felker-1/+2
2011-02-19make mktemp match the historic behavior, and update functions that use itRich Felker-5/+8
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 Felker-1/+1
2011-02-18major improvements to temp file name generatorRich Felker-16/+21
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 Felker-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 Felker-5/+9
2011-02-14begin namespace-cleanup of standard C headersRich Felker-0/+2
2011-02-12initial check-in, version 0.5.0v0.5.0Rich Felker-0/+76