pub unsafe fn sendfile(
out_fd: i32,
in_fd: i32,
offset: &mut off_t,
count: size_t
) -> Result<ssize_t, Errno>
Expand description
Transfer data between two file descriptors.
Examples found in repository?
examples/sendfile.rs (line 49)
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fn main() {
println!("S_IRUSR: {}", nc::S_IRUSR);
println!("S_IRGRP: {}", nc::S_IRGRP);
#[cfg(any(target_os = "linux", target_os = "android"))]
let in_fd = unsafe {
nc::openat(nc::AT_FDCWD, "/etc/passwd", nc::O_RDONLY, 0).expect("Failed to open file!")
};
#[cfg(target_os = "freebsd")]
let in_fd = unsafe {
nc::openat(nc::AT_FDCWD, "/etc/passwd", nc::O_RDONLY, 0).expect("Failed to open file!")
};
#[cfg(any(target_os = "linux", target_os = "android"))]
let out_fd = unsafe {
nc::openat(
nc::AT_FDCWD,
"/tmp/passwd.copy",
nc::O_WRONLY | nc::O_CREAT,
nc::S_IRUSR | nc::S_IWUSR | nc::S_IRGRP | nc::S_IROTH,
)
.expect("Failed to open passwd copy file")
};
#[cfg(target_os = "freebsd")]
let out_fd = unsafe {
nc::openat(
nc::AT_FDCWD,
"/tmp/passwd.copy",
nc::O_WRONLY | nc::O_CREAT,
nc::S_IRUSR | nc::S_IWUSR | nc::S_IRGRP | nc::S_IROTH,
)
.expect("Failed to open passwd copy file")
};
let mut stat = nc::stat_t::default();
unsafe { nc::fstat(in_fd, &mut stat).expect("Failed to get file stat!") };
println!("stat: {:?}", stat);
let count = stat.st_blksize as usize;
println!("count: {}", count);
let mut offset = 0;
let nread = unsafe {
nc::sendfile(out_fd, in_fd, &mut offset, count).expect("Failed to call sendfile()")
};
println!("nbytes: {}", nread);
unsafe {
let _ = nc::close(in_fd);
let _ = nc::close(out_fd);
}
}