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* remove incorrect cancellation points from realpathRich Felker2013-08-311-4/+4
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* debloat realpath's allocation strategyRich Felker2013-08-311-12/+6
| | | | | | | | | rather than allocating a PATH_MAX-sized buffer when the caller does not provide an output buffer, work first with a PATH_MAX-sized temp buffer with automatic storage, and either copy it to the caller's buffer or strdup it on success. this not only avoids massive memory waste, but also avoids pulling in free (and thus the full malloc implementation) unnecessarily in static programs.
* make realpath use O_PATH when opening the fileRich Felker2013-08-311-1/+1
| | | | | | this avoids failure if the file is not readable and avoids odd behavior for device nodes, etc. on old kernels that lack O_PATH, the old behavior (O_RDONLY) will naturally happen as the fallback.
* debloat code that depends on /proc/self/fd/%d with shared functionRich Felker2013-08-021-1/+3
| | | | | | | I intend to add more Linux workarounds that depend on using these pathnames, and some of them will be in "syscall" functions that, from an anti-bloat standpoint, should not depend on the whole snprintf framework.
* fix some more O_CLOEXEC/SOCK_CLOEXEC issuesRich Felker2012-09-291-1/+1
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* use restrict everywhere it's required by c99 and/or posix 2008Rich Felker2012-09-061-1/+1
| | | | | | | | to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.
* fix memory leak on failure in realpathRich Felker2011-06-181-4/+4
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* minimal realpath implementation using /procRich Felker2011-04-171-0/+43
| | | | | | | clean and simple, but fails when the caller does not have permissions to open the file for reading or when /proc is not available. i may replace this with a full implementation later, possibly leaving this version as an optimization to use when it works.
* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+6