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proxmox-backup
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client: use tools::pipe instead of nix 

nix::unistd::pipe returns unguarded RawFds which should be
avoided

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2020-11-30 10:48:34 +01:00
parent b6570abe79
commit 35fe981c7d
1 changed files with 17 additions and 18 deletions
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35
src/bin/proxmox_backup_client/mount.rs
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@ -1,22 +1,21 @@
use std::path::PathBuf;
use std::sync::Arc;
use std::os::unix::io::RawFd;
use std::path::Path;
use std::ffi::OsStr;
use std::collections::HashMap;
use std::ffi::OsStr;
use std::hash::BuildHasher;
use std::os::unix::io::AsRawFd;
use std::path::{Path, PathBuf};
use std::sync::Arc;
use anyhow::{bail, format_err, Error};
use futures::future::FutureExt;
use futures::select;
use futures::stream::{StreamExt, TryStreamExt};
use nix::unistd::{fork, ForkResult};
use serde_json::Value;
use tokio::signal::unix::{signal, SignalKind};
use nix::unistd::{fork, ForkResult, pipe};
use futures::select;
use futures::future::FutureExt;
use futures::stream::{StreamExt, TryStreamExt};
use proxmox::{sortable, identity};
use proxmox::api::{ApiHandler, ApiMethod, RpcEnvironment, schema::*, cli::*};
use proxmox::tools::fd::Fd;
use proxmox_backup::tools;
use proxmox_backup::backup::{
@ -143,24 +142,24 @@ fn mount(
// Process should be deamonized.
// Make sure to fork before the async runtime is instantiated to avoid troubles.
let pipe = pipe()?;
let (pr, pw) = proxmox_backup::tools::pipe()?;
match unsafe { fork() } {
Ok(ForkResult::Parent { .. }) => {
nix::unistd::close(pipe.1).unwrap();
drop(pw);
// Blocks the parent process until we are ready to go in the child
let _res = nix::unistd::read(pipe.0, &mut [0]).unwrap();
let _res = nix::unistd::read(pr.as_raw_fd(), &mut [0]).unwrap();
Ok(Value::Null)
}
Ok(ForkResult::Child) => {
nix::unistd::close(pipe.0).unwrap();
drop(pr);
nix::unistd::setsid().unwrap();
proxmox_backup::tools::runtime::main(mount_do(param, Some(pipe.1)))
proxmox_backup::tools::runtime::main(mount_do(param, Some(pw)))
}
Err(_) => bail!("failed to daemonize process"),
}
}
async fn mount_do(param: Value, pipe: Option<RawFd>) -> Result<Value, Error> {
async fn mount_do(param: Value, pipe: Option<Fd>) -> Result<Value, Error> {
let repo = extract_repository_from_value(&param)?;
let archive_name = tools::required_string_param(&param, "archive-name")?;
let client = connect(&repo)?;
@ -235,8 +234,8 @@ async fn mount_do(param: Value, pipe: Option<RawFd>) -> Result<Value, Error> {
}
// Signal the parent process that we are done with the setup and it can
// terminate.
nix::unistd::write(pipe, &[0u8])?;
nix::unistd::close(pipe).unwrap();
nix::unistd::write(pipe.as_raw_fd(), &[0u8])?;
let _: Fd = pipe;
}
Ok(())