EC
ErrorKind::Interrupted
RustINFOCriticalI/O

System call interrupted

Quick Answer

Retry the operation in a loop; Interrupted is transient.

What this means

A system call was interrupted by a signal before it could complete. The operation can be retried.

Why it happens
  1. 1Signal (e.g. SIGCHLD, SIGALRM) delivered during a blocking syscall
  2. 2Only relevant on Unix; rare in practice

Fix

Retry loop

Retry loop
use std::io::{Read, ErrorKind};
loop {
    match reader.read(&mut buf) {
        Err(e) if e.kind() == ErrorKind::Interrupted => continue,
        r => return r,
    }
}

Why this works

Immediately retries on Interrupted; passes all other results to the caller.

Code examples
Noterust
// BufReader::read_line retries Interrupted internally
Same error in other languages
EINTRin Linux / POSIX→
Sources

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