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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-06-26 11:52:14 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-09-01 09:52:47 -0300 |
| commit | e0d2eb5a798613f9c24ad0056da86c8cfd19043d (patch) | |
| tree | 0a2a24bc7bbaf00cfae96baacdae8f23202d40e7 /sysdeps/unix | |
| parent | da162bf23403009af7a7406b9007a8141c4576ab (diff) | |
| download | glibc-e0d2eb5a798613f9c24ad0056da86c8cfd19043d.tar glibc-e0d2eb5a798613f9c24ad0056da86c8cfd19043d.tar.gz glibc-e0d2eb5a798613f9c24ad0056da86c8cfd19043d.tar.bz2 glibc-e0d2eb5a798613f9c24ad0056da86c8cfd19043d.zip | |
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
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/gentempfd.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/gentempfd.c b/sysdeps/unix/sysv/linux/gentempfd.c new file mode 100644 index 0000000000..902cbe286e --- /dev/null +++ b/sysdeps/unix/sysv/linux/gentempfd.c @@ -0,0 +1,34 @@ +/* Generate a temporary file descriptor. Linux version. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdio.h> +#include <fcntl.h> +#include <errno.h> + +int +__gen_tempfd (int flags) +{ + int fd = __open (P_tmpdir, O_RDWR | O_TMPFILE | O_EXCL | flags, + S_IRUSR | S_IWUSR); + if (fd < 0 && errno == ENOENT && strcmp (P_tmpdir, "/tmp") != 0) + fd = __open ("/tmp", O_RDWR | O_TMPFILE | O_EXCL | flags, + S_IRUSR | S_IWUSR); + + return fd; +} +libc_hidden_def (__gen_tempfd) |