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| author | Maciej Żenczykowski <maze@google.com> | 2022-01-21 11:19:55 -0800 |
|---|---|---|
| committer | Maciej Żenczykowski <maze@google.com> | 2022-05-06 10:33:04 +0000 |
| commit | b65e1050476ec37330129a7de480dc4fb662a05c (patch) | |
| tree | 8c8542ec2d8c64c34e17b244146b0b64a2c25df4 /libc/include/unistd.h | |
| parent | 0f6d493d28d4d47a77c73d2c92a60b356dadd70a (diff) | |
| download | bionic-b65e1050476ec37330129a7de480dc4fb662a05c.tar.gz | |
add new Linux close_range() system call to bionic
See:
https://man7.org/linux/man-pages/man2/close_range.2.html
Note: 'man close_range' documents 'flags' as unsigned int,
while glibc unistd.h as just 'int'. Picking 'int' to match glibc,
though it probably doesn't matter.
BYPASS_INCLUSIVE_LANGUAGE_REASON=man is a cli command
Test: TreeHugger
Bug: 229913920
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I1e2d1c8edc2ea28922d60f3ce3e534a784622cd1
Diffstat (limited to 'libc/include/unistd.h')
| -rw-r--r-- | libc/include/unistd.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libc/include/unistd.h b/libc/include/unistd.h index e36042187..f142525ba 100644 --- a/libc/include/unistd.h +++ b/libc/include/unistd.h @@ -317,6 +317,22 @@ int setdomainname(const char* __name, size_t __n) __INTRODUCED_IN(26); void swab(const void* __src, void* __dst, ssize_t __byte_count) __INTRODUCED_IN(28); #endif +/** + * [close_range(2)](https://man7.org/linux/man-pages/man2/close_range.2.html) + * performs an action (which depends on value of flags) on an inclusive range + * of file descriptors. + * + * Available since API level 34. + * + * Note: there is no emulation on too old kernels, hence this will fail with + * -1/ENOSYS on pre-5.9 kernels, -1/EINVAL for unsupported flags. In particular + * CLOSE_RANGE_CLOEXEC requires 5.11, though support was backported to Android + * Common Kernel 5.10-T. + * + * Returns 0 on success, and returns -1 and sets `errno` on failure. + */ +int close_range(unsigned int __min_fd, unsigned int __max_fd, int __flags) __INTRODUCED_IN(34); + #if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS) #define _UNISTD_H_ #include <bits/fortify/unistd.h> |