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#[cfg(feature = "fs")]
use std::io::{IoSlice, IoSliceMut};
#[cfg(feature = "fs")]
#[test]
fn test_readwrite_pv() {
use rustix::fs::{cwd, openat, Mode, OFlags};
use rustix::io::{preadv, pwritev};
let tmp = tempfile::tempdir().unwrap();
let dir = openat(cwd(), tmp.path(), OFlags::RDONLY, Mode::empty()).unwrap();
let foo = openat(
&dir,
"foo",
OFlags::RDWR | OFlags::CREATE | OFlags::TRUNC,
Mode::RUSR | Mode::WUSR,
)
.unwrap();
// For most targets, just call `pwritev`.
#[cfg(not(any(target_os = "ios", target_os = "macos")))]
{
pwritev(&foo, &[IoSlice::new(b"hello")], 200).unwrap();
}
// macOS only has pwritev in newer versions; allow it to fail with `ENOSYS`.
#[cfg(any(target_os = "ios", target_os = "macos"))]
{
match pwritev(&foo, &[IoSlice::new(b"hello")], 200) {
Ok(_) => (),
Err(rustix::io::Errno::NOSYS) => return,
Err(err) => Err(err).unwrap(),
}
}
pwritev(&foo, &[IoSlice::new(b"world")], 300).unwrap();
let mut buf = [0_u8; 5];
preadv(&foo, &mut [IoSliceMut::new(&mut buf)], 200).unwrap();
assert_eq!(&buf, b"hello");
preadv(&foo, &mut [IoSliceMut::new(&mut buf)], 300).unwrap();
assert_eq!(&buf, b"world");
}
#[cfg(feature = "fs")]
#[test]
fn test_readwrite_p() {
use rustix::fs::{cwd, openat, Mode, OFlags};
use rustix::io::{pread, pwrite};
let tmp = tempfile::tempdir().unwrap();
let dir = openat(cwd(), tmp.path(), OFlags::RDONLY, Mode::empty()).unwrap();
let foo = openat(
&dir,
"foo",
OFlags::RDWR | OFlags::CREATE | OFlags::TRUNC,
Mode::RUSR | Mode::WUSR,
)
.unwrap();
pwrite(&foo, b"hello", 200).unwrap();
pwrite(&foo, b"world", 300).unwrap();
let mut buf = [0_u8; 5];
pread(&foo, &mut buf, 200).unwrap();
assert_eq!(&buf, b"hello");
pread(&foo, &mut buf, 300).unwrap();
assert_eq!(&buf, b"world");
}
#[cfg(feature = "fs")]
#[test]
fn test_readwrite_v() {
use rustix::fs::{cwd, openat, seek, Mode, OFlags};
use rustix::io::{readv, writev, SeekFrom};
let tmp = tempfile::tempdir().unwrap();
let dir = openat(cwd(), tmp.path(), OFlags::RDONLY, Mode::empty()).unwrap();
let foo = openat(
&dir,
"foo",
OFlags::RDWR | OFlags::CREATE | OFlags::TRUNC,
Mode::RUSR | Mode::WUSR,
)
.unwrap();
writev(&foo, &[IoSlice::new(b"hello")]).unwrap();
writev(&foo, &[IoSlice::new(b"world")]).unwrap();
seek(&foo, SeekFrom::Start(0)).unwrap();
let mut buf = [0_u8; 5];
readv(&foo, &mut [IoSliceMut::new(&mut buf)]).unwrap();
assert_eq!(&buf, b"hello");
readv(&foo, &mut [IoSliceMut::new(&mut buf)]).unwrap();
assert_eq!(&buf, b"world");
}
#[cfg(feature = "fs")]
#[test]
fn test_readwrite() {
use rustix::fs::{cwd, openat, seek, Mode, OFlags};
use rustix::io::{read, write};
use std::io::SeekFrom;
let tmp = tempfile::tempdir().unwrap();
let dir = openat(cwd(), tmp.path(), OFlags::RDONLY, Mode::empty()).unwrap();
let foo = openat(
&dir,
"foo",
OFlags::RDWR | OFlags::CREATE | OFlags::TRUNC,
Mode::RUSR | Mode::WUSR,
)
.unwrap();
write(&foo, b"hello").unwrap();
write(&foo, b"world").unwrap();
seek(&foo, SeekFrom::Start(0)).unwrap();
let mut buf = [0_u8; 5];
read(&foo, &mut buf).unwrap();
assert_eq!(&buf, b"hello");
read(&foo, &mut buf).unwrap();
assert_eq!(&buf, b"world");
}
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