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Migrate mknod to clap, closes #2051 (#2056)

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* mknod: add tests for fifo

* mknod: add test for character device
This commit is contained in:
rethab 2021-05-05 22:59:40 +02:00 committed by GitHub
parent 86a8195166
commit 231bb7be93
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 371 additions and 166 deletions
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1
.gitignore vendored
View file

@ -12,3 +12,4 @@ target/
Cargo.lock
lib*.a
/docs/_build
*.iml

2
Cargo.lock generated
View file

@ -2116,7 +2116,7 @@ dependencies = [
name = "uu_mknod"
version = "0.0.6"
dependencies = [
"getopts",
"clap",
"libc",
"uucore",
"uucore_procs",

2
src/uu/mknod/Cargo.toml
View file

@ -16,7 +16,7 @@ name = "uu_mknod"
path = "src/mknod.rs"
[dependencies]
getopts = "0.2.18"
clap = "2.33"
libc = "^0.2.42"
uucore = { version=">=0.0.8", package="uucore", path="../../uucore", features=["mode"] }
uucore_procs = { version=">=0.0.5", package="uucore_procs", path="../../uucore_procs" }

304
src/uu/mknod/src/mknod.rs
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@ -5,21 +5,41 @@
// For the full copyright and license information, please view the LICENSE
// file that was distributed with this source code.
// spell-checker:ignore (ToDO) parsemode makedev sysmacros makenod newmode perror IFBLK IFCHR IFIFO
// spell-checker:ignore (ToDO) parsemode makedev sysmacros perror IFBLK IFCHR IFIFO
#[macro_use]
extern crate uucore;
use std::ffi::CString;
use clap::{App, Arg, ArgMatches};
use libc::{dev_t, mode_t};
use libc::{S_IFBLK, S_IFCHR, S_IFIFO, S_IRGRP, S_IROTH, S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR};
use getopts::Options;
use std::ffi::CString;
use uucore::InvalidEncodingHandling;
static NAME: &str = "mknod";
static VERSION: &str = env!("CARGO_PKG_VERSION");
static ABOUT: &str = "Create the special file NAME of the given TYPE.";
static USAGE: &str = "mknod [OPTION]... NAME TYPE [MAJOR MINOR]";
static LONG_HELP: &str = "Mandatory arguments to long options are mandatory for short options too.
-m, --mode=MODE set file permission bits to MODE, not a=rw - umask
--help display this help and exit
--version output version information and exit
Both MAJOR and MINOR must be specified when TYPE is b, c, or u, and they
must be omitted when TYPE is p. If MAJOR or MINOR begins with 0x or 0X,
it is interpreted as hexadecimal; otherwise, if it begins with 0, as octal;
otherwise, as decimal. TYPE may be:
b create a block (buffered) special file
c, u create a character (unbuffered) special file
p create a FIFO
NOTE: your shell may have its own version of mknod, which usually supersedes
the version described here. Please refer to your shell's documentation
for details about the options it supports.
";
const MODE_RW_UGO: mode_t = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
@ -30,13 +50,35 @@ fn makedev(maj: u64, min: u64) -> dev_t {
}
#[cfg(windows)]
fn _makenod(path: CString, mode: mode_t, dev: dev_t) -> i32 {
fn _makenod(file_name: &str, mode: mode_t, dev: dev_t) -> i32 {
panic!("Unsupported for windows platform")
}
#[cfg(unix)]
fn _makenod(path: CString, mode: mode_t, dev: dev_t) -> i32 {
unsafe { libc::mknod(path.as_ptr(), mode, dev) }
fn _makenod(file_name: &str, mode: mode_t, dev: dev_t) -> i32 {
let c_str = CString::new(file_name).expect("Failed to convert to CString");
// the user supplied a mode
let set_umask = mode & MODE_RW_UGO != MODE_RW_UGO;
unsafe {
// store prev umask
let last_umask = if set_umask { libc::umask(0) } else { 0 };
let errno = libc::mknod(c_str.as_ptr(), mode, dev);
// set umask back to original value
if set_umask {
libc::umask(last_umask);
}
if errno == -1 {
let c_str = CString::new(NAME).expect("Failed to convert to CString");
// shows the error from the mknod syscall
libc::perror(c_str.as_ptr());
}
errno
}
}
#[allow(clippy::cognitive_complexity)]
@ -44,156 +86,136 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
let args = args
.collect_str(InvalidEncodingHandling::Ignore)
.accept_any();
let mut opts = Options::new();
// Linux-specific options, not implemented
// opts.optflag("Z", "", "set the SELinux security context to default type");
// opts.optopt("", "context", "like -Z, or if CTX is specified then set the SELinux or SMACK security context to CTX");
opts.optopt(
"m",
"mode",
"set file permission bits to MODE, not a=rw - umask",
"MODE",
);
opts.optflag("", "help", "display this help and exit");
opts.optflag("", "version", "output version information and exit");
let matches = App::new(executable!())
.version(VERSION)
.usage(USAGE)
.after_help(LONG_HELP)
.about(ABOUT)
.arg(
Arg::with_name("mode")
.short("m")
.long("mode")
.value_name("MODE")
.help("set file permission bits to MODE, not a=rw - umask"),
)
.arg(
Arg::with_name("name")
.value_name("NAME")
.help("name of the new file")
.required(true)
.index(1),
)
.arg(
Arg::with_name("type")
.value_name("TYPE")
.help("type of the new file (b, c, u or p)")
.required(true)
.validator(valid_type)
.index(2),
)
.arg(
Arg::with_name("major")
.value_name("MAJOR")
.help("major file type")
.validator(valid_u64)
.index(3),
)
.arg(
Arg::with_name("minor")
.value_name("MINOR")
.help("minor file type")
.validator(valid_u64)
.index(4),
)
.get_matches_from(args);
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(f) => crash!(1, "{}\nTry '{} --help' for more information.", f, NAME),
let mode = match get_mode(&matches) {
Ok(mode) => mode,
Err(err) => {
show_info!("{}", err);
return 1;
}
};
if matches.opt_present("help") {
println!(
"Usage: {0} [OPTION]... NAME TYPE [MAJOR MINOR]
let file_name = matches.value_of("name").expect("Missing argument 'NAME'");
Mandatory arguments to long options are mandatory for short options too.
-m, --mode=MODE set file permission bits to MODE, not a=rw - umask
--help display this help and exit
--version output version information and exit
// Only check the first character, to allow mnemonic usage like
// 'mknod /dev/rst0 character 18 0'.
let ch = matches
.value_of("type")
.expect("Missing argument 'TYPE'")
.chars()
.next()
.expect("Failed to get the first char");
Both MAJOR and MINOR must be specified when TYPE is b, c, or u, and they
must be omitted when TYPE is p. If MAJOR or MINOR begins with 0x or 0X,
it is interpreted as hexadecimal; otherwise, if it begins with 0, as octal;
otherwise, as decimal. TYPE may be:
b create a block (buffered) special file
c, u create a character (unbuffered) special file
p create a FIFO
NOTE: your shell may have its own version of mknod, which usually supersedes
the version described here. Please refer to your shell's documentation
for details about the options it supports.",
NAME
);
return 0;
}
if matches.opt_present("version") {
println!("{} {}", NAME, VERSION);
return 0;
}
let mut last_umask: mode_t = 0;
let mut newmode: mode_t = MODE_RW_UGO;
if matches.opt_present("mode") {
match uucore::mode::parse_mode(matches.opt_str("mode")) {
Ok(parsed) => {
if parsed > 0o777 {
show_info!("mode must specify only file permission bits");
return 1;
}
newmode = parsed;
}
Err(e) => {
show_info!("{}", e);
return 1;
}
if ch == 'p' {
if matches.is_present("major") || matches.is_present("minor") {
eprintln!("Fifos do not have major and minor device numbers.");
eprintln!("Try '{} --help' for more information.", NAME);
1
} else {
_makenod(file_name, S_IFIFO | mode, 0)
}
unsafe {
last_umask = libc::umask(0);
}
}
} else {
match (matches.value_of("major"), matches.value_of("minor")) {
(None, None) | (_, None) | (None, _) => {
eprintln!("Special files require major and minor device numbers.");
eprintln!("Try '{} --help' for more information.", NAME);
1
}
(Some(major), Some(minor)) => {
let major = major.parse::<u64>().expect("validated by clap");
let minor = minor.parse::<u64>().expect("validated by clap");
let mut ret = 0i32;
match matches.free.len() {
0 => show_usage_error!("missing operand"),
1 => show_usage_error!("missing operand after ‘{}’", matches.free[0]),
_ => {
let args = &matches.free;
let c_str = CString::new(args[0].as_str()).expect("Failed to convert to CString");
// Only check the first character, to allow mnemonic usage like
// 'mknod /dev/rst0 character 18 0'.
let ch = args[1]
.chars()
.next()
.expect("Failed to get the first char");
if ch == 'p' {
if args.len() > 2 {
show_info!("{}: extra operand ‘{}’", NAME, args[2]);
if args.len() == 4 {
eprintln!("Fifos do not have major and minor device numbers.");
}
eprintln!("Try '{} --help' for more information.", NAME);
return 1;
}
ret = _makenod(c_str, S_IFIFO | newmode, 0);
} else {
if args.len() < 4 {
show_info!("missing operand after ‘{}’", args[args.len() - 1]);
if args.len() == 2 {
eprintln!("Special files require major and minor device numbers.");
}
eprintln!("Try '{} --help' for more information.", NAME);
return 1;
} else if args.len() > 4 {
show_usage_error!("extra operand ‘{}’", args[4]);
return 1;
} else if !"bcu".contains(ch) {
show_usage_error!("invalid device type ‘{}’", args[1]);
return 1;
}
let maj = args[2].parse::<u64>();
let min = args[3].parse::<u64>();
if maj.is_err() {
show_info!("invalid major device number ‘{}’", args[2]);
return 1;
} else if min.is_err() {
show_info!("invalid minor device number ‘{}’", args[3]);
return 1;
}
let (maj, min) = (maj.unwrap(), min.unwrap());
let dev = makedev(maj, min);
let dev = makedev(major, minor);
if ch == 'b' {
// block special file
ret = _makenod(c_str, S_IFBLK | newmode, dev);
} else {
_makenod(file_name, S_IFBLK | mode, dev)
} else if ch == 'c' || ch == 'u' {
// char special file
ret = _makenod(c_str, S_IFCHR | newmode, dev);
_makenod(file_name, S_IFCHR | mode, dev)
} else {
unreachable!("{} was validated to be only b, c or u", ch);
}
}
}
}
if last_umask != 0 {
unsafe {
libc::umask(last_umask);
}
}
if ret == -1 {
let c_str = CString::new(format!("{}: {}", NAME, matches.free[0]).as_str())
.expect("Failed to convert to CString");
unsafe {
libc::perror(c_str.as_ptr());
}
}
ret
}
fn get_mode(matches: &ArgMatches) -> Result<mode_t, String> {
match matches.value_of("mode") {
None => Ok(MODE_RW_UGO),
Some(str_mode) => uucore::mode::parse_mode(str_mode)
.map_err(|e| format!("invalid mode ({})", e))
.and_then(|mode| {
if mode > 0o777 {
Err("mode must specify only file permission bits".to_string())
} else {
Ok(mode)
}
}),
}
}
fn valid_type(tpe: String) -> Result<(), String> {
// Only check the first character, to allow mnemonic usage like
// 'mknod /dev/rst0 character 18 0'.
tpe.chars()
.next()
.ok_or_else(|| "missing device type".to_string())
.and_then(|first_char| {
if vec!['b', 'c', 'u', 'p'].contains(&first_char) {
Ok(())
} else {
Err(format!("invalid device type ‘{}’", tpe))
}
})
}
fn valid_u64(num: String) -> Result<(), String> {
num.parse::<u64>().map(|_| ()).map_err(|_| num)
}

54
src/uu/mknod/src/parsemode.rs Normal file
View file

@ -0,0 +1,54 @@
// spell-checker:ignore (ToDO) fperm
use libc::{mode_t, S_IRGRP, S_IROTH, S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR};
use uucore::mode;
pub const MODE_RW_UGO: mode_t = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
pub fn parse_mode(mode: &str) -> Result<mode_t, String> {
let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
let result = if mode.contains(arr) {
mode::parse_numeric(MODE_RW_UGO as u32, mode)
} else {
mode::parse_symbolic(MODE_RW_UGO as u32, mode, true)
};
result.map(|mode| mode as mode_t)
}
#[cfg(test)]
mod test {
/// Test if the program is running under WSL
// ref: <https://github.com/microsoft/WSL/issues/4555> @@ <https://archive.is/dP0bz>
// ToDO: test on WSL2 which likely doesn't need special handling; plan change to `is_wsl_1()` if WSL2 is less needy
pub fn is_wsl() -> bool {
#[cfg(target_os = "linux")]
{
if let Ok(b) = std::fs::read("/proc/sys/kernel/osrelease") {
if let Ok(s) = std::str::from_utf8(&b) {
let a = s.to_ascii_lowercase();
return a.contains("microsoft") || a.contains("wsl");
}
}
}
false
}
#[test]
fn symbolic_modes() {
assert_eq!(super::parse_mode("u+x").unwrap(), 0o766);
assert_eq!(
super::parse_mode("+x").unwrap(),
if !is_wsl() { 0o777 } else { 0o776 }
);
assert_eq!(super::parse_mode("a-w").unwrap(), 0o444);
assert_eq!(super::parse_mode("g-r").unwrap(), 0o626);
}
#[test]
fn numeric_modes() {
assert_eq!(super::parse_mode("644").unwrap(), 0o644);
assert_eq!(super::parse_mode("+100").unwrap(), 0o766);
assert_eq!(super::parse_mode("-4").unwrap(), 0o662);
}
}

33
src/uucore/src/lib/features/mode.rs
View file

@ -132,19 +132,15 @@ fn parse_change(mode: &str, fperm: u32, considering_dir: bool) -> (u32, usize) {
(srwx, pos)
}
pub fn parse_mode(mode: Option<String>) -> Result<mode_t, String> {
pub fn parse_mode(mode: &str) -> Result<mode_t, String> {
let fperm = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
if let Some(mode) = mode {
let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
let result = if mode.contains(arr) {
parse_numeric(fperm as u32, mode.as_str())
} else {
parse_symbolic(fperm as u32, mode.as_str(), true)
};
result.map(|mode| mode as mode_t)
let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
let result = if mode.contains(arr) {
parse_numeric(fperm as u32, mode)
} else {
Ok(fperm)
}
parse_symbolic(fperm as u32, mode, true)
};
result.map(|mode| mode as mode_t)
}
#[cfg(test)]
@ -152,20 +148,19 @@ mod test {
#[test]
fn symbolic_modes() {
assert_eq!(super::parse_mode(Some("u+x".to_owned())).unwrap(), 0o766);
assert_eq!(super::parse_mode("u+x").unwrap(), 0o766);
assert_eq!(
super::parse_mode(Some("+x".to_owned())).unwrap(),
super::parse_mode("+x").unwrap(),
if !crate::os::is_wsl_1() { 0o777 } else { 0o776 }
);
assert_eq!(super::parse_mode(Some("a-w".to_owned())).unwrap(), 0o444);
assert_eq!(super::parse_mode(Some("g-r".to_owned())).unwrap(), 0o626);
assert_eq!(super::parse_mode("a-w").unwrap(), 0o444);
assert_eq!(super::parse_mode("g-r").unwrap(), 0o626);
}
#[test]
fn numeric_modes() {
assert_eq!(super::parse_mode(Some("644".to_owned())).unwrap(), 0o644);
assert_eq!(super::parse_mode(Some("+100".to_owned())).unwrap(), 0o766);
assert_eq!(super::parse_mode(Some("-4".to_owned())).unwrap(), 0o662);
assert_eq!(super::parse_mode(None).unwrap(), 0o666);
assert_eq!(super::parse_mode("644").unwrap(), 0o644);
assert_eq!(super::parse_mode("+100").unwrap(), 0o766);
assert_eq!(super::parse_mode("-4").unwrap(), 0o662);
}
}

125
tests/by-util/test_mknod.rs
View file

@ -1 +1,124 @@
// ToDO: add tests
use crate::common::util::*;
#[cfg(not(windows))]
#[test]
fn test_mknod_help() {
new_ucmd!()
.arg("--help")
.succeeds()
.no_stderr()
.stdout_contains("USAGE:");
}
#[test]
#[cfg(not(windows))]
fn test_mknod_version() {
assert!(new_ucmd!()
.arg("--version")
.succeeds()
.no_stderr()
.stdout_str()
.starts_with("mknod"));
}
#[test]
#[cfg(not(windows))]
fn test_mknod_fifo_default_writable() {
let ts = TestScenario::new(util_name!());
ts.ucmd().arg("test_file").arg("p").succeeds();
assert!(ts.fixtures.is_fifo("test_file"));
assert!(!ts.fixtures.metadata("test_file").permissions().readonly());
}
#[test]
#[cfg(not(windows))]
fn test_mknod_fifo_mnemonic_usage() {
let ts = TestScenario::new(util_name!());
ts.ucmd().arg("test_file").arg("pipe").succeeds();
assert!(ts.fixtures.is_fifo("test_file"));
}
#[test]
#[cfg(not(windows))]
fn test_mknod_fifo_read_only() {
let ts = TestScenario::new(util_name!());
ts.ucmd()
.arg("-m")
.arg("a=r")
.arg("test_file")
.arg("p")
.succeeds();
assert!(ts.fixtures.is_fifo("test_file"));
assert!(ts.fixtures.metadata("test_file").permissions().readonly());
}
#[test]
#[cfg(not(windows))]
fn test_mknod_fifo_invalid_extra_operand() {
new_ucmd!()
.arg("test_file")
.arg("p")
.arg("1")
.arg("2")
.fails()
.stderr_contains(&"Fifos do not have major and minor device numbers");
}
#[test]
#[cfg(not(windows))]
fn test_mknod_character_device_requires_major_and_minor() {
new_ucmd!()
.arg("test_file")
.arg("c")
.fails()
.status_code(1)
.stderr_contains(&"Special files require major and minor device numbers.");
new_ucmd!()
.arg("test_file")
.arg("c")
.arg("1")
.fails()
.status_code(1)
.stderr_contains(&"Special files require major and minor device numbers.");
new_ucmd!()
.arg("test_file")
.arg("c")
.arg("1")
.arg("c")
.fails()
.status_code(1)
.stderr_contains(&"Invalid value for '<MINOR>'");
new_ucmd!()
.arg("test_file")
.arg("c")
.arg("c")
.arg("1")
.fails()
.status_code(1)
.stderr_contains(&"Invalid value for '<MAJOR>'");
}
#[test]
#[cfg(not(windows))]
fn test_mknod_invalid_arg() {
new_ucmd!()
.arg("--foo")
.fails()
.status_code(1)
.no_stdout()
.stderr_contains(&"Found argument '--foo' which wasn't expected");
}
#[test]
#[cfg(not(windows))]
fn test_mknod_invalid_mode() {
new_ucmd!()
.arg("--mode")
.arg("rw")
.arg("test_file")
.arg("p")
.fails()
.no_stdout()
.status_code(1)
.stderr_contains(&"invalid mode");
}

16
tests/common/util.rs
View file

@ -163,7 +163,7 @@ impl CmdResult {
/// asserts that the command's exit code is the same as the given one
pub fn status_code(&self, code: i32) -> &CmdResult {
assert!(self.code == Some(code));
assert_eq!(self.code, Some(code));
self
}
@ -295,12 +295,22 @@ impl CmdResult {
}
pub fn stdout_contains<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(self.stdout_str().contains(cmp.as_ref()));
assert!(
self.stdout_str().contains(cmp.as_ref()),
"'{}' does not contain '{}'",
self.stdout_str(),
cmp.as_ref()
);
self
}
pub fn stderr_contains<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(self.stderr_str().contains(cmp.as_ref()));
assert!(
self.stderr_str().contains(cmp.as_ref()),
"'{}' does not contain '{}'",
self.stderr_str(),
cmp.as_ref()
);
self
}