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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-06-26 11:52:14 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-09-01 09:52:47 -0300
commite0d2eb5a798613f9c24ad0056da86c8cfd19043d (patch)
tree0a2a24bc7bbaf00cfae96baacdae8f23202d40e7 /libc-abis
parentda162bf23403009af7a7406b9007a8141c4576ab (diff)
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linux: Implement tmpfile with O_TMPFILE (BZ#21530)
This patch adds O_TMPFILE support to tmpfile on Linux.  This is
similar to the previous suggestion by Andreas Schwab [1] with the
difference the file descriptor creation is parameterized to
compartmentalize Linux only open flags (O_TMPFILE) on sysdeps.

Checked on x86_64-linux-gnu.

	Adhemerval Zanella  <adhemerval.zanella@linaro.org>
	Andreas Schwab  <schwab@suse.de>

	[BZ #21530]
	* include/stdio.h (__gen_tempfd): New function.
	* stdio-common/Makefile (routines): Add gentempfd.
	* stdio-common/gentempfd.c: New file.
	* sysdeps/unix/sysv/linux/gentempfd.c: Likewise.
	* stdio-common/tmpfile.c (tmpfile): First try to use a system specific
	unnamed file first.

[1] https://sourceware.org/ml/libc-alpha/2017-06/msg01293.html
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