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fish.rs
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fish.rs
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//
// The main loop of the fish program.
/*
Copyright (C) 2005-2008 Axel Liljencrantz
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
use autocxx::prelude::*;
use crate::{
ast::Ast,
builtins::shared::{
BUILTIN_ERR_MISSING, BUILTIN_ERR_UNKNOWN, STATUS_CMD_OK, STATUS_CMD_UNKNOWN,
},
common::{
escape_string, exit_without_destructors, get_executable_path, str2wcstring, wcs2string,
EscapeStringStyle, PROFILING_ACTIVE, PROGRAM_NAME,
},
env::{
environment::{env_init, EnvStack, Environment},
ConfigPaths, EnvMode,
},
event::{self, Event},
ffi::{self, Repin},
flog::{self, activate_flog_categories_by_pattern, set_flog_file_fd, FLOG, FLOGF},
function, future_feature_flags as features,
history::start_private_mode,
parse_constants::{ParseErrorList, ParseErrorListFfi, ParseTreeFlags},
parse_tree::{ParsedSource, ParsedSourceRefFFI},
path::path_get_config,
signal::{signal_clear_cancel, signal_unblock_all},
threads::{self, asan_maybe_exit},
topic_monitor,
wchar::prelude::*,
wchar_ffi::{WCharFromFFI, WCharToFFI},
wutil::waccess,
};
use std::env;
use std::ffi::{CString, OsStr, OsString};
use std::fs::File;
use std::io;
use std::mem::MaybeUninit;
use std::os::unix::prelude::*;
use std::path::{Path, PathBuf};
use std::sync::atomic::Ordering;
use std::sync::Arc;
// FIXME: when the crate is actually called fish and not fish-rust, read this from cargo
// See: https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates
// for reference
const PACKAGE_NAME: &str = "fish"; // env!("CARGO_PKG_NAME");
const DOC_DIR: &str = {
match option_env!("DOCDIR") {
Some(e) => e,
None => "share/doc/fish",
}
};
const DATA_DIR: &str = {
match option_env!("DATADIR") {
Some(e) => e,
None => "share",
}
};
const SYSCONF_DIR: &str = {
match option_env!("SYSCONFDIR") {
Some(e) => e,
None => "/etc",
}
};
const BIN_DIR: &str = {
match option_env!("BINDIR") {
Some(e) => e,
None => "bin",
}
};
// C++ had this as optional, and used CMAKE_BINARY_DIR,
// should probably be swapped to `OUT_DIR` once CMake is gone?
// const OUT_DIR: &str = env!("OUT_DIR", "OUT_DIR was not specified");
const OUT_DIR: &str = env!("FISH_BUILD_DIR");
/// container to hold the options specified within the command line
#[derive(Default, Debug)]
struct FishCmdOpts {
/// Future feature flags values string
features: WString,
/// File path for debug output.
debug_output: Option<OsString>,
/// File path for profiling output, or empty for none.
profile_output: Option<OsString>,
profile_startup_output: Option<OsString>,
/// Commands to be executed in place of interactive shell.
batch_cmds: Vec<OsString>,
/// Commands to execute after the shell's config has been read.
postconfig_cmds: Vec<OsString>,
/// Whether to print rusage-self stats after execution.
print_rusage_self: bool,
/// Whether no-config is set.
no_config: bool,
/// Whether no-exec is set.
no_exec: bool,
/// Whether this is a login shell.
is_login: bool,
/// Whether this is an interactive session.
is_interactive_session: bool,
/// Whether to enable private mode.
enable_private_mode: bool,
}
/// \return a timeval converted to milliseconds.
#[allow(clippy::unnecessary_cast)]
fn tv_to_msec(tv: &libc::timeval) -> i64 {
// milliseconds per second
let mut msec = tv.tv_sec as i64 * 1000;
// microseconds per millisecond
msec += tv.tv_usec as i64 / 1000;
msec
}
fn print_rusage_self(mut dest: impl io::Write) {
let mut rs = MaybeUninit::zeroed();
if unsafe { libc::getrusage(libc::RUSAGE_SELF, rs.as_mut_ptr()) } != 0 {
let s = CString::new("getrusage").unwrap();
unsafe { libc::perror(s.as_ptr()) }
return;
}
let rs: libc::rusage = unsafe { rs.assume_init() };
let rss_kb = if cfg!(target_vendor = "apple") {
// mac use bytes.
rs.ru_maxrss / 1024
} else {
// Everyone else uses KB.
rs.ru_maxrss
};
let _ = writeln!(dest, " rusage self:");
let _ = writeln!(dest, " user time: {} ms", tv_to_msec(&rs.ru_utime));
let _ = writeln!(dest, " sys time: {} ms", tv_to_msec(&rs.ru_stime));
let _ = writeln!(
dest,
" total time: {} ms",
tv_to_msec(&rs.ru_utime) + tv_to_msec(&rs.ru_stime)
);
let _ = writeln!(dest, " max rss: {} kb", rss_kb);
let _ = writeln!(dest, " signals: {}", rs.ru_nsignals);
}
fn determine_config_directory_paths(argv0: &wstr) -> ConfigPaths {
// PORTING: why is this not just an associated method on ConfigPaths?
let mut paths = ConfigPaths::default();
let mut done = false;
// FIXME: osstr
let exec_path = get_executable_path(&argv0.to_string());
if let Ok(exec_path) = exec_path.canonicalize() {
FLOGF!(
config,
format!("exec_path: {:?}, argv[0]: {:?}", exec_path, argv0)
);
// TODO: we should determine program_name from argv0 somewhere in this file
// Detect if we're running right out of the CMAKE build directory
if exec_path.starts_with(OUT_DIR) {
let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
FLOGF!(
config,
"Running out of target directory, using paths relative to CARGO_MANIFEST_DIR:\n",
manifest_dir.display()
);
done = true;
paths = ConfigPaths {
data: manifest_dir.join("share"),
sysconf: manifest_dir.join("etc"),
doc: manifest_dir.join("user_doc/html"),
bin: OUT_DIR.into(),
}
}
if !done {
// The next check is that we are in a reloctable directory tree
let installed_suffix = Path::new("/bin/fish");
let just_a_fish = Path::new("/fish");
let suffix = if exec_path.ends_with(installed_suffix) {
Some(installed_suffix)
} else if exec_path.ends_with(just_a_fish) {
FLOG!(
config,
"'fish' not in a 'bin/', trying paths relative to source tree"
);
Some(just_a_fish)
} else {
None
};
if let Some(suffix) = suffix {
let seems_installed = suffix == installed_suffix;
let base_path: PathBuf = {
// overly elaborate way to strip the suffix from base_path
let mut remaining_suffix = suffix;
let mut base = exec_path;
while let Some(suffix) = remaining_suffix.parent() {
base.pop();
remaining_suffix = suffix;
}
// remove whatever remains in remaining_suffix
base.pop();
base
};
paths = if seems_installed {
ConfigPaths {
data: base_path.join("share/fish"),
sysconf: base_path.join("etc"),
doc: base_path.join("share/doc/fish"),
bin: base_path.join("bin"),
}
} else {
ConfigPaths {
data: base_path.join("share"),
sysconf: base_path.join("etc"),
doc: base_path.join("user_doc/html"),
bin: base_path,
}
};
if paths.data.exists() && paths.sysconf.exists() {
// The docs dir may not exist; in that case fall back to the compiled in path.
if !paths.doc.exists() {
paths.doc = PathBuf::from(DOC_DIR);
}
done = true;
}
}
}
}
if !done {
// Fall back to what got compiled in.
FLOG!(config, "Using compiled in paths:");
paths = ConfigPaths {
data: PathBuf::from(DATA_DIR).join("fish"),
sysconf: PathBuf::from(SYSCONF_DIR).join("fish"),
doc: DOC_DIR.into(),
bin: BIN_DIR.into(),
}
}
FLOGF!(
config,
sprintf!(
"determine_config_directory_paths() results:\npaths.data: %ls\npaths.sysconf: \
%ls\npaths.doc: %ls\npaths.bin: %ls",
paths.data.display().to_string(),
paths.sysconf.display().to_string(),
paths.doc.display().to_string(),
paths.bin.display().to_string()
)
);
paths
}
// Source the file config.fish in the given directory.
fn source_config_in_directory(parser: &mut ffi::parser_t, dir: &wstr) {
// If the config.fish file doesn't exist or isn't readable silently return. Fish versions up
// thru 2.2.0 would instead try to source the file with stderr redirected to /dev/null to deal
// with that possibility.
//
// This introduces a race condition since the readability of the file can change between this
// test and the execution of the 'source' command. However, that is not a security problem in
// this context so we ignore it.
let config_pathname = dir.to_owned() + L!("/config.fish");
let escaped_pathname = escape_string(dir, EscapeStringStyle::default()) + L!("/config.fish");
if waccess(&config_pathname, libc::R_OK) != 0 {
FLOGF!(
config,
"not sourcing %ls (not readable or does not exist)",
escaped_pathname
);
return;
}
FLOGF!(config, "sourcing", escaped_pathname);
let cmd: WString = L!("builtin source ").to_owned() + escaped_pathname.as_utfstr();
parser.libdata_pod().within_fish_init = true;
// PORTING: you need to call `within_unique_ptr`, otherwise it is a no-op
let _ = parser
.pin()
.eval_string_ffi1(&cmd.to_ffi())
.within_unique_ptr();
parser.libdata_pod().within_fish_init = false;
}
/// Parse init files. exec_path is the path of fish executable as determined by argv[0].
fn read_init(parser: &mut ffi::parser_t, paths: &ConfigPaths) {
source_config_in_directory(parser, &str2wcstring(paths.data.as_os_str().as_bytes()));
source_config_in_directory(parser, &str2wcstring(paths.sysconf.as_os_str().as_bytes()));
// We need to get the configuration directory before we can source the user configuration file.
// If path_get_config returns false then we have no configuration directory and no custom config
// to load.
if let Some(config_dir) = path_get_config() {
source_config_in_directory(parser, &config_dir);
}
}
fn run_command_list(parser: &mut ffi::parser_t, cmds: &[OsString]) -> i32 {
let mut retval = STATUS_CMD_OK;
for cmd in cmds {
let cmd_wcs = str2wcstring(cmd.as_bytes());
let mut errors = ParseErrorList::new();
let ast = Ast::parse(&cmd_wcs, ParseTreeFlags::empty(), Some(&mut errors));
let errored = ast.errored() || {
// parse_util_detect_errors_in_ast is just partially ported
// parse_util_detect_errors_in_ast(&ast, &cmd_wcs, Some(&mut errors)).is_err();
let mut errors_ffi = ParseErrorListFfi(errors.clone());
let res = ffi::parse_util_detect_errors_ffi(
&ast as *const Ast as *const _,
&cmd_wcs.to_ffi(),
&mut errors_ffi as *mut ParseErrorListFfi as *mut _,
);
errors = errors_ffi.0;
res != 0
};
if !errored {
// Construct a parsed source ref.
// Be careful to transfer ownership, this could be a very large string.
let ps = ParsedSourceRefFFI(Some(Arc::new(ParsedSource::new(cmd_wcs, ast))));
// this casting is needed since rust defines the type, so the type is incomplete when we
// read the headers
let _ = parser
.pin()
.eval_parsed_source_ffi1(
&ps as *const ParsedSourceRefFFI as *const _,
ffi::block_type_t::top,
)
.within_unique_ptr();
retval = STATUS_CMD_OK;
} else {
let mut sb = WString::new().to_ffi();
let errors_ffi = ParseErrorListFfi(errors);
parser.pin().get_backtrace_ffi(
&cmd_wcs.to_ffi(),
&errors_ffi as *const ParseErrorListFfi as *const _,
sb.pin_mut(),
);
// fwprint! does not seem to work?
eprint!("{}", sb.from_ffi());
// XXX: Why is this the return for "unknown command"?
retval = STATUS_CMD_UNKNOWN;
}
}
retval.unwrap()
}
fn fish_parse_opt(args: &mut [&wstr], opts: &mut FishCmdOpts) -> usize {
use crate::wgetopt::{wgetopter_t, wopt, woption, woption_argument_t::*};
const RUSAGE_ARG: char = 1 as char;
const PRINT_DEBUG_CATEGORIES_ARG: char = 2 as char;
const PROFILE_STARTUP_ARG: char = 4 as char;
const SHORT_OPTS: &wstr = L!("+hPilNnvc:C:p:d:f:D:o:");
const LONG_OPTS: &[woption<'static>] = &[
wopt(L!("command"), required_argument, 'c'),
wopt(L!("init-command"), required_argument, 'C'),
wopt(L!("features"), required_argument, 'f'),
wopt(L!("debug"), required_argument, 'd'),
wopt(L!("debug-output"), required_argument, 'o'),
wopt(L!("debug-stack-frames"), required_argument, 'D'),
wopt(L!("interactive"), no_argument, 'i'),
wopt(L!("login"), no_argument, 'l'),
wopt(L!("no-config"), no_argument, 'N'),
wopt(L!("no-execute"), no_argument, 'n'),
wopt(L!("print-rusage-self"), no_argument, RUSAGE_ARG),
wopt(
L!("print-debug-categories"),
no_argument,
PRINT_DEBUG_CATEGORIES_ARG,
),
wopt(L!("profile"), required_argument, 'p'),
wopt(
L!("profile-startup"),
required_argument,
PROFILE_STARTUP_ARG,
),
wopt(L!("private"), required_argument, 'P'),
wopt(L!("help"), no_argument, 'h'),
wopt(L!("version"), no_argument, 'v'),
];
let mut w = wgetopter_t::new(SHORT_OPTS, LONG_OPTS, args);
while let Some(c) = w.wgetopt_long() {
match c {
'c' => opts
.batch_cmds
.push(OsString::from_vec(wcs2string(w.woptarg.unwrap()))),
'C' => opts
.postconfig_cmds
.push(OsString::from_vec(wcs2string(w.woptarg.unwrap()))),
'd' => {
ffi::activate_flog_categories_by_pattern(w.woptarg.unwrap());
activate_flog_categories_by_pattern(w.woptarg.unwrap());
for cat in flog::categories::all_categories() {
if cat.enabled.load(Ordering::Relaxed) {
println!("Debug enabled for category: {}", cat.name);
}
}
}
'o' => opts.debug_output = Some(OsString::from_vec(wcs2string(w.woptarg.unwrap()))),
'f' => opts.features = w.woptarg.unwrap().to_owned(),
'h' => opts.batch_cmds.push("__fish_print_help fish".into()),
'i' => opts.is_interactive_session = true,
'l' => opts.is_login = true,
'N' => {
opts.no_config = true;
// --no-config implies private mode, we won't be saving history
opts.enable_private_mode = true;
}
'n' => opts.no_exec = true,
RUSAGE_ARG => opts.print_rusage_self = true,
PRINT_DEBUG_CATEGORIES_ARG => {
let cats = flog::categories::all_categories();
// Compute width of longest name.
let mut name_width = 0;
for cat in cats.iter() {
name_width = usize::max(name_width, cat.name.len());
}
// A little extra space.
name_width += 2;
for cat in cats.iter() {
let desc = wgettext_str(cat.description);
// https://doc.rust-lang.org/std/fmt/#syntax
// this is left-justified
println!("{:<width$} {}", cat.name, desc, width = name_width);
}
std::process::exit(0);
}
'p' => opts.profile_output = Some(OsString::from_vec(wcs2string(w.woptarg.unwrap()))),
PROFILE_STARTUP_ARG => {
// With "--profile-startup" we immediately turn profiling on.
opts.profile_startup_output =
Some(OsString::from_vec(wcs2string(w.woptarg.unwrap())));
PROFILING_ACTIVE.store(true);
ffi::set_profiling_active(true);
}
'P' => opts.enable_private_mode = true,
'v' => {
// FIXME: this was _(L"%s, version %s\n"), but rust-fwprintf! takes a literal instead of an expr
// and appears to not print anything
println!("{}, version {}", PACKAGE_NAME, crate::BUILD_VERSION);
std::process::exit(0);
}
'D' => {
// TODO: Option is currently useless.
// Either remove it or make it work with FLOG.
}
'?' => {
eprintln!(
"{}",
wgettext_fmt!(BUILTIN_ERR_UNKNOWN, "fish", args[w.woptind - 1])
);
std::process::exit(1)
}
':' => {
eprintln!(
"{}",
wgettext_fmt!(BUILTIN_ERR_MISSING, "fish", args[w.woptind - 1])
);
std::process::exit(1)
}
_ => panic!("unexpected retval from wgetoptr_t"),
}
}
let optind = w.woptind;
// If our command name begins with a dash that implies we're a login shell.
opts.is_login |= args[0].char_at(0) == '-';
// We are an interactive session if we have not been given an explicit
// command or file to execute and stdin is a tty. Note that the -i or
// --interactive options also force interactive mode.
if opts.batch_cmds.is_empty()
&& optind == args.len()
&& unsafe { libc::isatty(libc::STDIN_FILENO) != 0 }
{
ffi::set_interactive_session(true);
}
optind
}
fn cstr_from_osstr(s: &OsStr) -> CString {
// is there no better way to do this?
// this is
// CStr::from_bytes_until_nul(s.as_bytes()).unwrap()
// except we need to add the nul if it is not present
CString::new(
s.as_bytes()
.iter()
.cloned()
.take_while(|&c| c != b'\0')
.collect::<Vec<_>>(),
)
.unwrap()
}
fn main() -> i32 {
let mut args: Vec<WString> = env::args_os()
.map(|osstr| str2wcstring(osstr.as_bytes()))
.collect();
PROGRAM_NAME
.set(L!("fish"))
.expect("multiple entrypoints setting PROGRAM_NAME");
let mut res = 1;
let mut my_optind;
topic_monitor::topic_monitor_init();
threads::init();
signal_unblock_all();
{
let s = CString::new("").unwrap();
unsafe {
libc::setlocale(libc::LC_ALL, s.as_ptr());
}
}
if args.is_empty() {
args.push("fish".into());
}
if let Some(debug_categories) = env::var_os("FISH_DEBUG") {
let s = str2wcstring(debug_categories.as_bytes());
activate_flog_categories_by_pattern(&s);
ffi::activate_flog_categories_by_pattern(s);
}
let owning_args = args;
let mut args_for_opts: Vec<&wstr> = owning_args.iter().map(WString::as_utfstr).collect();
let mut opts = FishCmdOpts::default();
my_optind = fish_parse_opt(&mut args_for_opts, &mut opts);
let args = args_for_opts;
// Direct any debug output right away.
// --debug-output takes precedence, otherwise $FISH_DEBUG_OUTPUT is used.
// PORTING: this is a slight difference from C++, we now skip reading the env var if the argument is an empty string
if opts.debug_output.is_none() {
opts.debug_output = env::var_os("FISH_DEBUG_OUTPUT");
}
let mut debug_output = std::ptr::null_mut();
if let Some(debug_path) = opts.debug_output {
let path = cstr_from_osstr(&debug_path);
let mode = CString::new("w").unwrap();
let debug_file = unsafe { libc::fopen(path.as_ptr(), mode.as_ptr()) };
if debug_file.is_null() {
eprintln!("Could not open file {:?}", debug_output);
let s = CString::new("fopen").unwrap();
unsafe { libc::perror(s.as_ptr()) }
std::process::exit(-1);
}
unsafe { ffi::set_cloexec(c_int(libc::fileno(debug_file)), true) };
ffi::flog_setlinebuf_ffi(debug_file as *mut _);
ffi::set_flog_output_file_ffi(debug_file as *mut _);
set_flog_file_fd(unsafe { libc::fileno(debug_file) });
debug_output = debug_file;
/* TODO: just use File when C++ does not need a *mut FILE
debug_output = match File::options()
.write(true)
.truncate(true)
.create(true)
.open(debug_path)
{
Ok(dbg_file) => {
// Rust sets O_CLOEXEC by default
// https://github.com/rust-lang/rust/blob/07438b0928c6691d6ee734a5a77823ec143be94d/library/std/src/sys/unix/fs.rs#L1059
flog::set_flog_file_fd(dbg_file.as_raw_fd());
Some(dbg_file)
}
Err(e) => {
// TODO: should not be debug-print
eprintln!("Could not open file {:?}", debug_output);
eprintln!("{}", e);
std::process::exit(1);
}
};
*/
}
if opts.is_interactive_session && opts.no_exec {
FLOGF!(
warning,
wgettext!("Can not use the no-execute mode when running an interactive session")
);
opts.no_exec = false;
}
// Apply our options
if opts.is_login {
ffi::mark_login();
}
if opts.no_exec {
ffi::mark_no_exec();
}
if opts.is_interactive_session {
ffi::set_interactive_session(true);
}
if opts.enable_private_mode {
start_private_mode(EnvStack::globals());
}
// Only save (and therefore restore) the fg process group if we are interactive. See issues
// #197 and #1002.
if ffi::is_interactive_session() {
// save_term_foreground_process_group();
ffi::save_term_foreground_process_group();
}
let mut paths: Option<ConfigPaths> = None;
// If we're not executing, there's no need to find the config.
if !opts.no_exec {
paths = Some(determine_config_directory_paths(args[0]));
env_init(paths.as_ref(), !opts.no_config, opts.no_config);
}
// Set features early in case other initialization depends on them.
// Start with the ones set in the environment, then those set on the command line (so the
// command line takes precedence).
if let Some(features_var) = EnvStack::globals().getf(L!("fish_features"), EnvMode::default()) {
for s in features_var.as_list() {
features::set_from_string(s.as_utfstr());
}
}
features::set_from_string(opts.features.as_utfstr());
ffi::proc_init();
ffi::misc_init();
ffi::reader_init();
let parser = unsafe { &mut *ffi::parser_t::principal_parser_ffi() };
parser.pin().set_syncs_uvars(!opts.no_config);
if !opts.no_exec && !opts.no_config {
read_init(parser, paths.as_ref().unwrap());
}
if ffi::is_interactive_session() && opts.no_config && !opts.no_exec {
// If we have no config, we default to the default key bindings.
parser.get_vars().set_one(
L!("fish_key_bindings"),
EnvMode::UNEXPORT,
L!("fish_default_key_bindings").to_owned(),
);
if function::exists(L!("fish_default_key_bindings"), parser) {
run_command_list(parser, &[OsString::from("fish_default_key_bindings")]);
}
}
// Re-read the terminal modes after config, it might have changed them.
ffi::term_copy_modes();
// Stomp the exit status of any initialization commands (issue #635).
// PORTING: it is actually really nice that this just compiles, assuming it works
parser
.pin()
.set_last_statuses(ffi::statuses_t::just(c_int(STATUS_CMD_OK.unwrap())).within_box());
// TODO: if-let-chains
if opts.profile_startup_output.is_some() && opts.profile_startup_output != opts.profile_output {
let s = cstr_from_osstr(&opts.profile_startup_output.unwrap());
parser.pin().emit_profiling(s.as_ptr());
// If we are profiling both, ensure the startup data only
// ends up in the startup file.
parser.pin().clear_profiling();
}
PROFILING_ACTIVE.store(opts.profile_output.is_some());
ffi::set_profiling_active(opts.profile_output.is_some());
// Run post-config commands specified as arguments, if any.
if !opts.postconfig_cmds.is_empty() {
res = run_command_list(parser, &opts.postconfig_cmds);
}
// Clear signals in case we were interrupted (#9024).
signal_clear_cancel();
if !opts.batch_cmds.is_empty() {
// Run the commands specified as arguments, if any.
if ffi::get_login() {
// Do something nasty to support OpenSUSE assuming we're bash. This may modify cmds.
fish_xdm_login_hack_hack_hack_hack(&mut opts.batch_cmds, &args[my_optind..]);
}
// Pass additional args as $argv.
// Note that we *don't* support setting argv[0]/$0, unlike e.g. bash.
// PORTING: the args were converted to WString here in C++
let list = &args[my_optind..];
parser.get_vars().set(
L!("argv"),
EnvMode::default(),
list.iter().map(|&s| s.to_owned()).collect(),
);
res = run_command_list(parser, &opts.batch_cmds);
parser.libdata_pod().exit_current_script = false;
} else if my_optind == args.len() {
// Implicitly interactive mode.
if opts.no_exec && unsafe { libc::isatty(libc::STDIN_FILENO) != 0 } {
FLOGF!(
error,
"no-execute mode enabled and no script given. Exiting"
);
// above line should always exit
return libc::EXIT_FAILURE;
}
res = ffi::reader_read_ffi(parser.pin(), c_int(libc::STDIN_FILENO)).into();
} else {
// C++ had not converted at this point, we must undo
let n = wcs2string(args[my_optind]);
let path = OsStr::from_bytes(&n);
my_optind += 1;
// Rust sets cloexec by default, see above
// We don't need autoclose_fd_t when we use File, it will be closed on drop.
match File::options().read(true).open(path) {
Err(e) => {
FLOGF!(
error,
wgettext!("Error reading script file '%s':"),
path.to_string_lossy()
);
eprintln!("{}", e);
}
Ok(f) => {
// PORTING: the args were converted to WString here in C++
let list = &args[my_optind..];
parser.get_vars().set(
L!("argv"),
EnvMode::default(),
list.iter().map(|&s| s.to_owned()).collect(),
);
let rel_filename = &args[my_optind - 1];
// PORTING: this used to be `scoped_push`
let old_filename = parser.pin().current_filename_ffi().from_ffi();
parser.pin().set_filename_ffi(rel_filename.to_ffi());
res = ffi::reader_read_ffi(parser.pin(), c_int(f.as_raw_fd())).into();
if res != 0 {
FLOGF!(
warning,
wgettext_fmt!("Error while reading file %ls\n", path.to_string_lossy())
);
}
parser.pin().set_filename_ffi(old_filename.to_ffi());
}
}
}
let exit_status = if res != 0 {
STATUS_CMD_UNKNOWN.unwrap()
} else {
parser.pin().get_last_status().into()
};
event::fire(
parser,
Event::process_exit(unsafe { libc::getpid() }, exit_status),
);
// Trigger any exit handlers.
event::fire_generic(
parser,
L!("fire_exit").to_owned(),
vec![exit_status.to_wstring()],
);
ffi::restore_term_mode();
// this is ported, but not adopted
ffi::restore_term_foreground_process_group_for_exit();
if let Some(profile_output) = opts.profile_output {
let s = cstr_from_osstr(&profile_output);
parser.pin().emit_profiling(s.as_ptr());
}
ffi::history_save_all();
if opts.print_rusage_self {
print_rusage_self(std::io::stderr());
}
if !debug_output.is_null() {
unsafe { libc::fclose(debug_output) };
}
asan_maybe_exit(exit_status);
exit_without_destructors(exit_status)
}
// https://github.com/fish-shell/fish-shell/issues/367
//
// With them the Seed of Wisdom did I sow,
// And with my own hand labour'd it to grow:
// And this was all the Harvest that I reap'd---
// "I came like Water, and like Wind I go."
fn escape_single_quoted_hack_hack_hack_hack(s: &wstr) -> OsString {
let mut result = OsString::with_capacity(s.len() + 2);
result.push("\'");
for c in s.chars() {
// Escape backslashes and single quotes only.
if matches!(c, '\\' | '\'') {
result.push("\\");
}
result.push(c.to_string())
}
result.push("\'");
return result;
}
fn fish_xdm_login_hack_hack_hack_hack(cmds: &mut Vec<OsString>, args: &[&wstr]) -> bool {
if cmds.len() != 1 {
return false;
}
let mut result = false;
let cmd = cmds.get(0).unwrap();
if cmd == "exec \"${@}\"" || cmd == "exec \"$@\"" {
// We're going to construct a new command that starts with exec, and then has the
// remaining arguments escaped.
let mut new_cmd = OsString::from("exec");
for arg in args {
new_cmd.push(" ");
new_cmd.push(escape_single_quoted_hack_hack_hack_hack(arg));
}
cmds[0] = new_cmd;
result = true;
}
return result;
}
#[cxx::bridge]
mod fish_ffi {
extern "Rust" {
#[cxx_name = "rust_main"]
fn main() -> i32;
}
}