fix: improve desktop entry field code handling
- The %f and %u field codes may now be expanded within a word - Handle field code escapes (%%) - Support the %c and %k field codes This will notably fix desktop entries and context menu actions that pass files as a long argument, such as `--option=%f`.
This commit is contained in:
Michael Aaron Murphy
parent
d5dbcc7677
commit
d775f3e5e8
5 changed files with 165 additions and 146 deletions
1
Cargo.lock
generated
1
Cargo.lock
generated
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@ -1375,6 +1375,7 @@ version = "1.0.11"
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dependencies = [
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"anyhow",
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"atomic_float",
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"bstr",
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"bzip2",
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"compio",
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"cosmic-client-toolkit",
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@ -65,6 +65,7 @@ tracing-subscriber = { version = "0.3.23", features = ["env-filter"] }
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thiserror = "2.0.18"
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atomic_float = "1.1.0"
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num_enum = "0.7.6"
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bstr = "1.12.1"
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# Completion-based IO runtime to enable io_uring / IOCP file IO support.
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[dependencies.compio]
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40
src/app.rs
40
src/app.rs
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@ -884,31 +884,39 @@ impl App {
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#[cfg(feature = "desktop")]
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fn launch_desktop_entries(paths: &[impl AsRef<Path>]) {
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use cosmic::desktop::fde::DesktopEntry;
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let locales = cosmic::desktop::fde::get_languages_from_env();
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for path in paths.iter().map(AsRef::as_ref) {
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match DesktopEntry::from_path::<&str>(path, None) {
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Ok(entry) => match entry.exec() {
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Some(exec) => match mime_app::exec_to_command(exec, &[] as &[&str; 0]) {
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Some(commands) => {
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let cwd_opt = entry.desktop_entry("Path");
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Some(exec) => {
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match mime_app::exec_to_command(
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exec,
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entry.name(&locales).as_deref().unwrap_or_default(),
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Some(path),
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&[] as &[&str; 0],
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) {
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Some(commands) => {
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let cwd_opt = entry.desktop_entry("Path");
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for mut command in commands {
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if let Some(cwd) = cwd_opt {
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command.current_dir(cwd);
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}
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for mut command in commands {
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if let Some(cwd) = cwd_opt {
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command.current_dir(cwd);
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}
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if let Err(err) = spawn_detached(&mut command) {
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log::warn!("failed to execute {}: {}", path.display(), err);
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if let Err(err) = spawn_detached(&mut command) {
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log::warn!("failed to execute {}: {}", path.display(), err);
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}
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}
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}
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None => {
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log::warn!(
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"failed to parse {}: invalid Desktop Entry/Exec",
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path.display()
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);
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}
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}
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None => {
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log::warn!(
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"failed to parse {}: invalid Desktop Entry/Exec",
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path.display()
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);
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}
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},
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}
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None => {
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log::warn!(
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"failed to parse {}: missing Desktop Entry/Exec",
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@ -47,7 +47,7 @@ impl ContextActionPreset {
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}
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for step in &self.steps {
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let Some(commands) = mime_app::exec_to_command(step, paths) else {
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let Some(commands) = mime_app::exec_to_command(step, &self.name, None, paths) else {
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log::warn!(
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"failed to parse context action {:?}: invalid Exec {:?}",
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self.name,
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267
src/mime_app.rs
267
src/mime_app.rs
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@ -1,6 +1,7 @@
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// Copyright 2023 System76 <info@system76.com>
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// SPDX-License-Identifier: GPL-3.0-only
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use bstr::{BString, ByteSlice, ByteVec};
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#[cfg(feature = "desktop")]
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use cosmic::desktop;
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use cosmic::widget;
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@ -8,145 +9,120 @@ pub use mime_guess::Mime;
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use rustc_hash::FxHashMap;
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use std::cmp::Ordering;
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use std::ffi::OsStr;
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use std::os::unix::ffi::OsStrExt;
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use std::path::{Path, PathBuf};
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use std::time::Instant;
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use std::{fs, io, process};
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// Supported exec key field codes
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const EXEC_HANDLERS: [&str; 4] = ["%f", "%F", "%u", "%U"];
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// Deprecated field codes. The spec advises to ignore these handlers.
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const DEPRECATED_HANDLERS: [&str; 6] = ["%d", "%D", "%n", "%N", "%v", "%m"];
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pub fn exec_to_command(
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exec: &str,
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entry_name: &str,
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entry_path: Option<&Path>,
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path_opt: &[impl AsRef<OsStr>],
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) -> Option<Vec<process::Command>> {
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let args_vec = shlex::split(exec)?;
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let program = args_vec.first()?;
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// Skip program to make indexing easier
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let args_vec = &args_vec[1..];
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let arguments = shlex::split(exec)?;
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// Base Command instance(s)
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// 1. We may need to launch multiple of the same process.
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// 2. Each of those processes will need to be passed args from exec.
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// 3. Each of those args may appear in any order.
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// 4. Arg order should be preserved.
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//
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// So, we'll go through exec in two passes. The first pass handles paths (%f etc) and args up
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// to the field code followed by the second which passes extra, non-% args to each processes.
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//
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// While it'd be marginally faster to process everything in one pass, that's problematic:
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// 1. path_opt may need to be cloned because it may be moved on each iteration (borrowck
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// doesn't know we'll only use it once)
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// 2. We have to keep track of which modifier (%f etc) we've used/seen already
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// 3. We have to keep track of which processes received non-modifier args which gets messy fast
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// 4. `exec` is likely small so looping over it twice is not a big deal
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let field_code_pos = args_vec
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.iter()
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.position(|arg| EXEC_HANDLERS.contains(&arg.as_str()));
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let args_handler = field_code_pos.and_then(|i| args_vec.get(i));
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// msrv
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// .inspect(|handler| log::trace!("Found paths handler: {handler} for exec: {exec}"));
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// Number of args before the field code.
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// This won't be an off by one err below because take is not zero indexed.
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let field_code_pos = field_code_pos.unwrap_or_default();
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let mut processes = match args_handler.map(String::as_str) {
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Some("%f") => {
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let mut processes = Vec::with_capacity(path_opt.len());
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if arguments.is_empty() {
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tracing::error!("command does not contain any arguments");
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return None;
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}
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for path in path_opt.iter().map(AsRef::as_ref) {
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// TODO: %f and %F need to handle non-file URLs (see spec)
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if from_file_or_dir(path).is_none() {
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log::warn!("Desktop file expects a file path instead of a URL: {path:?}");
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let mut commands = Vec::new();
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for path in path_opt.iter().map(AsRef::as_ref) {
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let mut batch_process = false;
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let mut args = Vec::with_capacity(arguments.len());
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let mut field_code_used = false;
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for argument in arguments.iter().skip(1) {
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let mut new_argument = BString::new(Vec::with_capacity(argument.capacity()));
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let mut chars = argument.chars();
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while let Some(char) = chars.next() {
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// https://specifications.freedesktop.org/desktop-entry/latest/exec-variables.html
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if char == '%' {
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match chars.next() {
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Some('%') => new_argument.push_char(char),
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Some('c') => new_argument.push_str(entry_name),
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Some('k') => {
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if let Some(path) = entry_path {
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new_argument.push_str(path.as_os_str().as_bytes());
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}
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}
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Some('f') => {
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if !field_code_used {
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// TODO: files on remote file systems should be copied to a temporary local file.
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batch_process = true;
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field_code_used = true;
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new_argument.push_str(path.as_bytes());
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}
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}
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Some('F') => {
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if !field_code_used && new_argument.is_empty() {
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field_code_used = true;
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for path in path_opt
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.iter()
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.map(AsRef::as_ref)
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.filter(|&path| from_file_or_dir(path).is_none())
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{
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args.push(BString::new(path.as_bytes().to_owned()));
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}
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}
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}
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Some('u') => {
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if !field_code_used {
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batch_process = true;
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field_code_used = true;
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new_argument.push_str(path.as_bytes());
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}
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}
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Some('U') => {
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if !field_code_used && new_argument.is_empty() {
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field_code_used = true;
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for path in path_opt.iter().map(AsRef::as_ref) {
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args.push(BString::new(path.as_bytes().to_owned()));
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}
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}
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}
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_ => (),
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}
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} else {
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new_argument.push_char(char);
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}
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// Passing multiple paths to %f should open an instance per path
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let mut process = process::Command::new(program);
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process.args(
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args_vec
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.iter()
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.map(AsRef::as_ref)
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.take(field_code_pos)
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.chain(std::iter::once(path)),
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);
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processes.push(process);
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}
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processes
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}
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Some("%F") => {
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// TODO: %f and %F need to handle non-file URLs (see spec)
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for invalid in path_opt
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.iter()
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.map(AsRef::as_ref)
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.filter(|&path| from_file_or_dir(path).is_none())
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{
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log::warn!("Desktop file expects a file path instead of a URL: {invalid:?}");
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if !new_argument.is_empty() {
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args.push(new_argument);
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}
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// Launch one instance with all args
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let mut process = process::Command::new(program);
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process.args(
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args_vec
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.iter()
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.map(OsStr::new)
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.take(field_code_pos)
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.chain(path_opt.iter().map(AsRef::as_ref)),
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);
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vec![process]
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}
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Some("%u") => path_opt
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.iter()
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.map(|path| {
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let mut process = process::Command::new(program);
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process.args(
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args_vec
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.iter()
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.map(OsStr::new)
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.take(field_code_pos)
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.chain(std::iter::once(path.as_ref())),
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);
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process
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})
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.collect(),
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Some("%U") => {
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let mut process = process::Command::new(program);
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process.args(
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args_vec
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.iter()
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.map(OsStr::new)
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.take(field_code_pos)
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.chain(path_opt.iter().map(AsRef::as_ref)),
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);
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vec![process]
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}
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Some(invalid) => unreachable!("All valid variants were checked; got: {invalid}"),
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None => vec![process::Command::new(program)],
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};
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// Pass 2: Add remaining arguments that are not % to each process
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for arg in args_vec.iter().skip(field_code_pos) {
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match arg.as_str() {
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// Consume path field codes or fail on codes we don't handle yet
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field_code if arg.starts_with('%') => {
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if !EXEC_HANDLERS.contains(&field_code)
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&& !DEPRECATED_HANDLERS.contains(&field_code)
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{
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log::warn!("unsupported Exec code {field_code:?} in {exec:?}");
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let mut command = process::Command::new(&arguments[0]);
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for arg in args {
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match arg.to_os_str() {
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Ok(arg) => {
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command.arg(arg);
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}
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Err(_) => {
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tracing::error!("invalid string encoding in command");
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return None;
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}
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}
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arg => {
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for process in &mut processes {
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process.arg(arg);
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}
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}
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}
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commands.push(command);
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if !batch_process {
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break;
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}
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}
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#[cfg(debug_assertions)]
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for command in &processes {
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for command in &commands {
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log::debug!(
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"Parsed program {} with args: {:?}",
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command.get_program().to_string_lossy(),
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@ -154,7 +130,7 @@ pub fn exec_to_command(
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);
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}
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Some(processes)
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Some(commands)
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}
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fn from_file_or_dir(path: impl AsRef<Path>) -> Option<url::Url> {
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@ -176,7 +152,12 @@ pub struct MimeApp {
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impl MimeApp {
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//TODO: move to libcosmic, support multiple files
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pub fn command<O: AsRef<OsStr>>(&self, path_opt: &[O]) -> Option<Vec<process::Command>> {
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exec_to_command(self.exec.as_deref()?, path_opt)
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exec_to_command(
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self.exec.as_deref()?,
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&self.name,
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self.path.as_deref(),
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path_opt,
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)
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}
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}
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@ -472,11 +453,29 @@ impl Default for MimeAppCache {
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mod tests {
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use super::exec_to_command;
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#[test]
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fn keys_within_words() {
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let exec = "/usr/bin/foo --option=%f";
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let paths = ["file1"];
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let commands = exec_to_command(exec, "keys_within_words", None, &paths)
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.expect("Should parse valid exec");
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assert_eq!(1, commands.len());
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let command = commands.first().unwrap();
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assert_eq!("/usr/bin/foo", command.get_program().to_str().unwrap());
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assert_eq!(
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"--option=file1",
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command.get_args().next().unwrap().to_str().unwrap()
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);
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}
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#[test]
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fn one_path_f_field_code() {
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let exec = "/usr/bin/foo %f";
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let paths = ["file1"];
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
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let commands = exec_to_command(exec, "one_path_f_field_code", None, &paths)
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.expect("Should parse valid exec");
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assert_eq!(1, commands.len());
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let command = commands.first().unwrap();
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|
@ -493,7 +492,8 @@ mod tests {
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fn one_path_F_field_code() {
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let exec = "/usr/bin/bar %F";
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let paths = ["cat"];
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
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let commands = exec_to_command(exec, "one_path_F_field_code", None, &paths)
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.expect("Should parse valid exec");
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assert_eq!(1, commands.len());
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let command = commands.first().unwrap();
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|
@ -506,7 +506,8 @@ mod tests {
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fn one_path_u_field_code() {
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let exec = "/usr/bin/foobar %u";
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let paths = ["/home/josh/krumpli"];
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
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let commands = exec_to_command(exec, "one_path_u_field_code", None, &paths)
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.expect("Should parse valid exec");
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assert_eq!(1, commands.len());
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let command = commands.first().unwrap();
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|
@ -523,7 +524,8 @@ mod tests {
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fn one_path_U_field_code() {
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let exec = "/usr/bin/rmrfbye %U";
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let paths = ["/"];
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
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let commands = exec_to_command(exec, "one_path_U_field_code", None, &paths)
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.expect("Should parse valid exec");
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assert_eq!(1, commands.len());
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let command = commands.first().unwrap();
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|
|
@ -539,7 +541,8 @@ mod tests {
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"/usr/share/games/psp/miku.iso",
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"/usr/share/games/psp/eternia.iso",
|
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];
|
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
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let commands = exec_to_command(exec, "mult_path_f_field_code", None, &paths)
|
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.expect("Should parse valid exec");
|
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|
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assert_eq!(paths.len(), commands.len());
|
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for (command, path) in commands.into_iter().zip(paths.iter()) {
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|
|
@ -559,7 +562,8 @@ mod tests {
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"/usr/share/games/doom2/hr.wad",
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"/usr/share/games/doom2/hrmus.wad",
|
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];
|
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
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let commands = exec_to_command(exec, "mult_path_F_field_code", None, &paths)
|
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.expect("Should parse valid exec");
|
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|
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assert_eq!(1, commands.len());
|
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let command = commands.first().unwrap();
|
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|
|
@ -581,7 +585,8 @@ mod tests {
|
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"https://redox-os.org/",
|
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"https://system76.com/",
|
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];
|
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let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
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let commands = exec_to_command(exec, "mult_path_u_field_code", None, &paths)
|
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.expect("Should parse valid exec");
|
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|
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assert_eq!(paths.len(), commands.len());
|
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for (command, path) in commands.into_iter().zip(paths.iter()) {
|
||||
|
|
@ -604,7 +609,8 @@ mod tests {
|
|||
"frieren01.mkv",
|
||||
"rtmp://example.org/this/video/doesnt/exist.avi",
|
||||
];
|
||||
let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
||||
let commands = exec_to_command(exec, "mult_path_U_field_code", None, &paths)
|
||||
.expect("Should parse valid exec");
|
||||
|
||||
assert_eq!(1, commands.len());
|
||||
let command = commands.first().unwrap();
|
||||
|
|
@ -632,7 +638,8 @@ mod tests {
|
|||
"@@u",
|
||||
];
|
||||
let paths = ["file1.rs", "file2.rs"];
|
||||
let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
||||
let commands = exec_to_command(exec, "flatpak_style_exec", None, &paths)
|
||||
.expect("Should parse valid exec");
|
||||
|
||||
assert_eq!(1, commands.len());
|
||||
let command = commands.first().unwrap();
|
||||
|
|
@ -655,7 +662,8 @@ mod tests {
|
|||
"file:///usr/share/games/roguelike/mods/mod1",
|
||||
"file:///usr/share/games/roguelike/mods/mod2",
|
||||
];
|
||||
let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
||||
let commands = exec_to_command(exec, "multiple_field_codes", None, &paths)
|
||||
.expect("Should parse valid exec");
|
||||
|
||||
assert_eq!(1, commands.len());
|
||||
let command = commands.first().unwrap();
|
||||
|
|
@ -688,7 +696,8 @@ mod tests {
|
|||
];
|
||||
let paths = ["rust_game_dev.pdf", "superhero_ferris.epub"];
|
||||
let args_trailing = ["@@"];
|
||||
let commands = exec_to_command(exec, &paths).expect("Should parse valid exec");
|
||||
let commands = exec_to_command(exec, "sandwiched_field_code", None, &paths)
|
||||
.expect("Should parse valid exec");
|
||||
|
||||
assert_eq!(1, commands.len());
|
||||
let command = commands.first().unwrap();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue