Linux: Add `preadv2` and `pwritev2` and associated constants
These functions are the same as `preadv` and `pwritev` but have a flags parameter. `preadv2()` and `pwritev2()` first appeared in Linux 4.6. Library support was added in glibc 2.26.
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@ -1440,6 +1440,13 @@ pub const SYNC_FILE_RANGE_WAIT_BEFORE: ::c_uint = 1;
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pub const SYNC_FILE_RANGE_WRITE: ::c_uint = 2;
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pub const SYNC_FILE_RANGE_WAIT_AFTER: ::c_uint = 4;
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// Flags for preadv2/pwritev2
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pub const RWF_HIPRI: ::c_int = 0x00000001;
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pub const RWF_DSYNC: ::c_int = 0x00000002;
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pub const RWF_SYNC: ::c_int = 0x00000004;
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pub const RWF_NOWAIT: ::c_int = 0x00000008;
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pub const RWF_APPEND: ::c_int = 0x00000010;
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pub const AIO_CANCELED: ::c_int = 0;
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pub const AIO_NOTCANCELED: ::c_int = 1;
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pub const AIO_ALLDONE: ::c_int = 2;
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@ -3026,12 +3033,26 @@ extern "C" {
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iovcnt: ::c_int,
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offset: ::off_t,
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) -> ::ssize_t;
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pub fn pwritev2(
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fd: ::c_int,
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iov: *const ::iovec,
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iovcnt: ::c_int,
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offset: ::off_t,
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flags: ::c_int,
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) -> ::ssize_t;
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pub fn preadv(
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fd: ::c_int,
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iov: *const ::iovec,
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iovcnt: ::c_int,
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offset: ::off_t,
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) -> ::ssize_t;
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pub fn preadv2(
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fd: ::c_int,
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iov: *const ::iovec,
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iovcnt: ::c_int,
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offset: ::off_t,
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flags: ::c_int,
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) -> ::ssize_t;
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pub fn quotactl(
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cmd: ::c_int,
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special: *const ::c_char,
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