diff --git a/Cargo.lock b/Cargo.lock index dae4e963cf5..f25430a88ae 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -3925,6 +3925,7 @@ version = "0.5.0" dependencies = [ "clap", "fluent", + "libc", "memchr", "memmap2", "regex", diff --git a/src/uu/dd/Cargo.toml b/src/uu/dd/Cargo.toml index d1ac79fb52e..eba0e3d09d8 100644 --- a/src/uu/dd/Cargo.toml +++ b/src/uu/dd/Cargo.toml @@ -26,6 +26,7 @@ uucore = { workspace = true, features = [ "parser-size", "quoting-style", "fs", + "signals", ] } thiserror = { workspace = true } fluent = { workspace = true } diff --git a/src/uu/dd/src/dd.rs b/src/uu/dd/src/dd.rs index 7cc4f73924d..c93497b03bb 100644 --- a/src/uu/dd/src/dd.rs +++ b/src/uu/dd/src/dd.rs @@ -5,6 +5,9 @@ // spell-checker:ignore fname, ftype, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, behaviour, bmax, bremain, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, iseek, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, oseek, outfile, parseargs, rlen, rmax, rremain, rsofar, rstat, sigusr, wlen, wstat seekable oconv canonicalized fadvise Fadvise FADV DONTNEED ESPIPE bufferedoutput, SETFL +#[cfg(unix)] +uucore::init_stdio_state_capture!(); + mod blocks; mod bufferedoutput; mod conversion_tables; @@ -1485,6 +1488,11 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> { .unwrap_or_default(), )?; + #[cfg(unix)] + if uucore::signals::stderr_was_closed() && settings.status != Some(StatusLevel::None) { + return Err(USimpleError::new(1, "write error")); + } + let i = match settings.infile { #[cfg(unix)] Some(ref infile) if is_fifo(infile) => Input::new_fifo(Path::new(&infile), &settings)?, diff --git a/src/uu/dd/src/progress.rs b/src/uu/dd/src/progress.rs index b8bfe327c68..da51f959c59 100644 --- a/src/uu/dd/src/progress.rs +++ b/src/uu/dd/src/progress.rs @@ -18,7 +18,7 @@ use std::time::Duration; #[cfg(target_os = "linux")] use signal_hook::iterator::Handle; use uucore::{ - error::UResult, + error::{UResult, set_exit_code}, format::num_format::{FloatVariant, Formatter}, locale::setup_localization, translate, @@ -231,7 +231,9 @@ impl ProgUpdate { /// See [`ProgUpdate::write_io_lines`] for more information. pub(crate) fn print_io_lines(&self) { let mut stderr = std::io::stderr(); - self.write_io_lines(&mut stderr).unwrap(); + if self.write_io_lines(&mut stderr).is_err() { + set_exit_code(1); + } } /// Re-print the number of bytes written, duration, and throughput. @@ -240,7 +242,9 @@ impl ProgUpdate { pub(crate) fn reprint_prog_line(&self) { let mut stderr = std::io::stderr(); let rewrite = true; - self.write_prog_line(&mut stderr, rewrite).unwrap(); + if self.write_prog_line(&mut stderr, rewrite).is_err() { + set_exit_code(1); + } } /// Write all summary statistics. @@ -248,7 +252,9 @@ impl ProgUpdate { /// See [`ProgUpdate::write_transfer_stats`] for more information. pub(crate) fn print_transfer_stats(&self, new_line: bool) { let mut stderr = std::io::stderr(); - self.write_transfer_stats(&mut stderr, new_line).unwrap(); + if self.write_transfer_stats(&mut stderr, new_line).is_err() { + set_exit_code(1); + } } /// Write all the final statistics. diff --git a/src/uu/tac/Cargo.toml b/src/uu/tac/Cargo.toml index 79e6b661055..b576f704dab 100644 --- a/src/uu/tac/Cargo.toml +++ b/src/uu/tac/Cargo.toml @@ -24,7 +24,8 @@ memchr = { workspace = true } memmap2 = { workspace = true } regex = { workspace = true } clap = { workspace = true } -uucore = { workspace = true } +libc = { workspace = true } +uucore = { workspace = true, features = ["signals"] } thiserror = { workspace = true } fluent = { workspace = true } diff --git a/src/uu/tac/src/tac.rs b/src/uu/tac/src/tac.rs index 507dd153199..7740fdc1cac 100644 --- a/src/uu/tac/src/tac.rs +++ b/src/uu/tac/src/tac.rs @@ -4,6 +4,9 @@ // file that was distributed with this source code. // spell-checker:ignore (ToDO) sbytes slen dlen memmem memmap Mmap mmap SIGBUS +#[cfg(unix)] +uucore::init_stdio_state_capture!(); + mod error; use clap::{Arg, ArgAction, Command}; @@ -15,8 +18,9 @@ use std::{ fs::{File, read}, path::Path, }; -use uucore::error::UError; -use uucore::error::UResult; +#[cfg(unix)] +use uucore::error::set_exit_code; +use uucore::error::{UError, UResult}; use uucore::{format_usage, show}; use crate::error::TacError; @@ -237,6 +241,17 @@ fn tac(filenames: &[OsString], before: bool, regex: bool, separator: &str) -> UR let buf; let data: &[u8] = if filename == "-" { + #[cfg(unix)] + if uucore::signals::stdin_was_closed() { + let e: Box = TacError::ReadError( + OsString::from("-"), + std::io::Error::from_raw_os_error(libc::EBADF), + ) + .into(); + show!(e); + set_exit_code(1); + continue; + } if let Some(mmap1) = try_mmap_stdin() { mmap = mmap1; &mmap diff --git a/src/uu/tail/Cargo.toml b/src/uu/tail/Cargo.toml index 7d7b57a74a3..732278732f0 100644 --- a/src/uu/tail/Cargo.toml +++ b/src/uu/tail/Cargo.toml @@ -23,7 +23,7 @@ clap = { workspace = true } libc = { workspace = true } memchr = { workspace = true } notify = { workspace = true } -uucore = { workspace = true, features = ["fs", "parser-size"] } +uucore = { workspace = true, features = ["fs", "parser-size", "signals"] } same-file = { workspace = true } fluent = { workspace = true } diff --git a/src/uu/tail/src/paths.rs b/src/uu/tail/src/paths.rs index 340a0b29dec..a2e647a2695 100644 --- a/src/uu/tail/src/paths.rs +++ b/src/uu/tail/src/paths.rs @@ -229,14 +229,13 @@ pub fn path_is_tailable(path: &Path) -> bool { } #[inline] +#[cfg(unix)] +pub fn stdin_is_bad_fd() -> bool { + uucore::signals::stdin_was_closed() +} + +#[inline] +#[cfg(not(unix))] pub fn stdin_is_bad_fd() -> bool { - // FIXME : Rust's stdlib is reopening fds as /dev/null - // see also: https://github.com/uutils/coreutils/issues/2873 - // (gnu/tests/tail-2/follow-stdin.sh fails because of this) - //#[cfg(unix)] - { - //platform::stdin_is_bad_fd() - } - //#[cfg(not(unix))] false } diff --git a/src/uu/tail/src/tail.rs b/src/uu/tail/src/tail.rs index cd10203b3f7..0d1794e0d82 100644 --- a/src/uu/tail/src/tail.rs +++ b/src/uu/tail/src/tail.rs @@ -33,11 +33,14 @@ use std::fs::File; use std::io::{self, BufReader, BufWriter, ErrorKind, Read, Seek, SeekFrom, Write, stdin, stdout}; use std::path::{Path, PathBuf}; use uucore::display::Quotable; -use uucore::error::{FromIo, UResult, USimpleError, get_exit_code, set_exit_code}; +use uucore::error::{FromIo, UResult, USimpleError, set_exit_code}; use uucore::translate; use uucore::{show, show_error}; +#[cfg(unix)] +uucore::init_stdio_state_capture!(); + #[uucore::main] pub fn uumain(args: impl uucore::Args) -> UResult<()> { // When we receive a SIGPIPE signal, we want to terminate the process so @@ -105,10 +108,6 @@ fn uu_tail(settings: &Settings) -> UResult<()> { } } - if get_exit_code() > 0 && paths::stdin_is_bad_fd() { - show_error!("{}: {}", text::DASH, translate!("tail-bad-fd")); - } - Ok(()) } @@ -227,6 +226,17 @@ fn tail_stdin( } } + // Check if stdin was closed before Rust reopened it as /dev/null + if paths::stdin_is_bad_fd() { + set_exit_code(1); + show_error!( + "{}", + translate!("tail-error-cannot-fstat", "file" => translate!("tail-stdin-header").quote(), "error" => translate!("tail-bad-fd")) + ); + show_error!("{}", translate!("tail-no-files-remaining")); + return Ok(()); + } + match input.resolve() { // fifo Some(path) => { diff --git a/src/uu/timeout/src/timeout.rs b/src/uu/timeout/src/timeout.rs index 3e1a35c45b2..9e81a2b3051 100644 --- a/src/uu/timeout/src/timeout.rs +++ b/src/uu/timeout/src/timeout.rs @@ -4,12 +4,15 @@ // file that was distributed with this source code. // spell-checker:ignore (ToDO) tstr sigstr cmdname setpgid sigchld getpid +#[cfg(unix)] +uucore::init_stdio_state_capture!(); + mod status; use crate::status::ExitStatus; use clap::{Arg, ArgAction, Command}; use std::io::ErrorKind; -use std::os::unix::process::ExitStatusExt; +use std::os::unix::process::{CommandExt, ExitStatusExt}; use std::process::{self, Child, Stdio}; use std::sync::atomic::{self, AtomicBool}; use std::time::Duration; @@ -320,23 +323,34 @@ fn timeout( #[cfg(unix)] enable_pipe_errors()?; - let process = &mut process::Command::new(&cmd[0]) + let mut command = process::Command::new(&cmd[0]); + command .args(&cmd[1..]) .stdin(Stdio::inherit()) .stdout(Stdio::inherit()) - .stderr(Stdio::inherit()) - .spawn() - .map_err(|err| { - let status_code = match err.kind() { - ErrorKind::NotFound => ExitStatus::CommandNotFound.into(), - ErrorKind::PermissionDenied => ExitStatus::CannotInvoke.into(), - _ => ExitStatus::CannotInvoke.into(), - }; - USimpleError::new( - status_code, - translate!("timeout-error-failed-to-execute-process", "error" => err), - ) - })?; + .stderr(Stdio::inherit()); + + // If stdin was closed before Rust reopened it as /dev/null, close it in child + if uucore::signals::stdin_was_closed() { + unsafe { + command.pre_exec(|| { + libc::close(libc::STDIN_FILENO); + Ok(()) + }); + } + } + + let process = &mut command.spawn().map_err(|err| { + let status_code = match err.kind() { + ErrorKind::NotFound => ExitStatus::CommandNotFound.into(), + ErrorKind::PermissionDenied => ExitStatus::CannotInvoke.into(), + _ => ExitStatus::CannotInvoke.into(), + }; + USimpleError::new( + status_code, + translate!("timeout-error-failed-to-execute-process", "error" => err), + ) + })?; unblock_sigchld(); catch_sigterm(); // Wait for the child process for the specified time period. diff --git a/src/uucore/src/lib/features/signals.rs b/src/uucore/src/lib/features/signals.rs index 0bccb2173f6..5287ab609e2 100644 --- a/src/uucore/src/lib/features/signals.rs +++ b/src/uucore/src/lib/features/signals.rs @@ -3,7 +3,7 @@ // For the full copyright and license information, please view the LICENSE // file that was distributed with this source code. -// spell-checker:ignore (vars/api) fcntl setrlimit setitimer rubout pollable sysconf pgrp +// spell-checker:ignore (vars/api) fcntl setrlimit setitimer rubout pollable sysconf pgrp GETFD // spell-checker:ignore (vars/signals) ABRT ALRM CHLD SEGV SIGABRT SIGALRM SIGBUS SIGCHLD SIGCONT SIGDANGER SIGEMT SIGFPE SIGHUP SIGILL SIGINFO SIGINT SIGIO SIGIOT SIGKILL SIGMIGRATE SIGMSG SIGPIPE SIGPRE SIGPROF SIGPWR SIGQUIT SIGSEGV SIGSTOP SIGSYS SIGTALRM SIGTERM SIGTRAP SIGTSTP SIGTHR SIGTTIN SIGTTOU SIGURG SIGUSR SIGVIRT SIGVTALRM SIGWINCH SIGXCPU SIGXFSZ STKFLT PWR THR TSTP TTIN TTOU VIRT VTALRM XCPU XFSZ SIGCLD SIGPOLL SIGWAITING SIGAIOCANCEL SIGLWP SIGFREEZE SIGTHAW SIGCANCEL SIGLOST SIGXRES SIGJVM SIGRTMIN SIGRT SIGRTMAX TALRM AIOCANCEL XRES RTMIN RTMAX LTOSTOP //! This module provides a way to handle signals in a platform-independent way. @@ -426,6 +426,89 @@ pub fn ignore_interrupts() -> Result<(), Errno> { unsafe { signal(SIGINT, SigIgn) }.map(|_| ()) } +// Detect closed stdin/stdout before Rust reopens them as /dev/null (see issue #2873) +#[cfg(unix)] +use std::sync::atomic::{AtomicBool, Ordering}; + +#[cfg(unix)] +static STDIN_WAS_CLOSED: AtomicBool = AtomicBool::new(false); +#[cfg(unix)] +static STDOUT_WAS_CLOSED: AtomicBool = AtomicBool::new(false); +#[cfg(unix)] +static STDERR_WAS_CLOSED: AtomicBool = AtomicBool::new(false); + +#[cfg(unix)] +#[allow(clippy::missing_safety_doc)] +pub unsafe extern "C" fn capture_stdio_state() { + use nix::libc; + unsafe { + STDIN_WAS_CLOSED.store( + libc::fcntl(libc::STDIN_FILENO, libc::F_GETFD) == -1, + Ordering::Relaxed, + ); + STDOUT_WAS_CLOSED.store( + libc::fcntl(libc::STDOUT_FILENO, libc::F_GETFD) == -1, + Ordering::Relaxed, + ); + STDERR_WAS_CLOSED.store( + libc::fcntl(libc::STDERR_FILENO, libc::F_GETFD) == -1, + Ordering::Relaxed, + ); + } +} + +#[macro_export] +#[cfg(unix)] +macro_rules! init_stdio_state_capture { + () => { + #[cfg(not(target_os = "macos"))] + #[used] + #[unsafe(link_section = ".init_array")] + static CAPTURE_STDIO_STATE: unsafe extern "C" fn() = $crate::signals::capture_stdio_state; + + #[cfg(target_os = "macos")] + #[used] + #[unsafe(link_section = "__DATA,__mod_init_func")] + static CAPTURE_STDIO_STATE: unsafe extern "C" fn() = $crate::signals::capture_stdio_state; + }; +} + +#[macro_export] +#[cfg(not(unix))] +macro_rules! init_stdio_state_capture { + () => {}; +} + +#[cfg(unix)] +pub fn stdin_was_closed() -> bool { + STDIN_WAS_CLOSED.load(Ordering::Relaxed) +} + +#[cfg(not(unix))] +pub const fn stdin_was_closed() -> bool { + false +} + +#[cfg(unix)] +pub fn stdout_was_closed() -> bool { + STDOUT_WAS_CLOSED.load(Ordering::Relaxed) +} + +#[cfg(not(unix))] +pub const fn stdout_was_closed() -> bool { + false +} + +#[cfg(unix)] +pub fn stderr_was_closed() -> bool { + STDERR_WAS_CLOSED.load(Ordering::Relaxed) +} + +#[cfg(not(unix))] +pub const fn stderr_was_closed() -> bool { + false +} + #[test] fn signal_by_value() { assert_eq!(signal_by_name_or_value("0"), Some(0));