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Code Issues Activity

chmod: handle -octal and -[rwx]

Browse source 
The main issue is that -octal or -[rwx] is interpreted as an option by
getopts.
Search the args for such a pattern, remove it before parsing and
manually handle it afterwards.
Fixes #788.
This commit is contained in:
Luca Ottaviano 2016-03-15 14:18:39 +01:00
parent 9005ae7dbf
commit 2686ea75d7
2 changed files with 35 additions and 7 deletions
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30
src/chmod/chmod.rs
View file

@ -29,7 +29,7 @@ use walker::Walker;
const NAME: &'static str = "chmod";
const VERSION: &'static str = env!("CARGO_PKG_VERSION");
pub fn uumain(args: Vec<String>) -> i32 {
pub fn uumain(mut args: Vec<String>) -> i32 {
let mut opts = Options::new();
opts.optflag("c", "changes", "like verbose but report only when a change is made (unimplemented)");
opts.optflag("f", "quiet", "suppress most error messages (unimplemented)"); // TODO: support --silent
@ -40,7 +40,27 @@ pub fn uumain(args: Vec<String>) -> i32 {
opts.optflag("R", "recursive", "change files and directories recursively");
opts.optflag("h", "help", "display this help and exit");
opts.optflag("V", "version", "output version information and exit");
// TODO: sanitize input for - at beginning (e.g. chmod -x testfile). Solution is to add a to -x, making a-x
// sanitize input for - at beginning (e.g. chmod -x testfile). Remove
// the option and save it for later, after parsing is finished.
let mut negative_option = None;
for i in 0..args.len() {
if let Some(first) = args[i].chars().nth(0) {
if first != '-' {
continue;
}
if let Some(second) = args[i].chars().nth(1) {
match second {
'r' | 'w' | 'x' | 'X' | 's' | 't' | 'u' | 'g' | 'o' | '0' ... '7' => {
negative_option = Some(args.remove(i));
break;
},
_ => {}
}
}
}
}
let mut matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(f) => { crash!(1, "{}", f) }
@ -86,7 +106,13 @@ Each MODE is of the form '[ugoa]*([-+=]([rwxXst]*|[ugo]))+|[-+=]?[0-7]+'.",
});
let cmode =
if fmode.is_none() {
// If there was a negative option, now it's a good time to
// use it.
if negative_option.is_some() {
negative_option
} else {
Some(matches.free.remove(0))
}
} else {
None
};

10
tests/chmod.rs
View file

@ -59,10 +59,9 @@ fn test_chmod_octal() {
TestCase{args: vec!{"0700", TEST_FILE}, before: 0o000, after: 0o700},
TestCase{args: vec!{"0070", TEST_FILE}, before: 0o000, after: 0o070},
TestCase{args: vec!{"0007", TEST_FILE}, before: 0o000, after: 0o007},
// Known failues: #788
// TestCase{args: vec!{"-0700", TEST_FILE}, before: 0o700, after: 0o000},
// TestCase{args: vec!{"-0070", TEST_FILE}, before: 0o060, after: 0o000},
// TestCase{args: vec!{"-0007", TEST_FILE}, before: 0o001, after: 0o000},
TestCase{args: vec!{"-0700", TEST_FILE}, before: 0o700, after: 0o000},
TestCase{args: vec!{"-0070", TEST_FILE}, before: 0o060, after: 0o000},
TestCase{args: vec!{"-0007", TEST_FILE}, before: 0o001, after: 0o000},
TestCase{args: vec!{"+0100", TEST_FILE}, before: 0o600, after: 0o700},
TestCase{args: vec!{"+0020", TEST_FILE}, before: 0o050, after: 0o070},
TestCase{args: vec!{"+0004", TEST_FILE}, before: 0o003, after: 0o007},
@ -77,6 +76,9 @@ fn test_chmod_ugoa() {
TestCase{args: vec!{"g=rwx", TEST_FILE}, before: 0o000, after: 0o070},
TestCase{args: vec!{"o=rwx", TEST_FILE}, before: 0o000, after: 0o007},
TestCase{args: vec!{"a=rwx", TEST_FILE}, before: 0o000, after: 0o777},
TestCase{args: vec!{"-r", TEST_FILE}, before: 0o777, after: 0o333},
TestCase{args: vec!{"-w", TEST_FILE}, before: 0o777, after: 0o555},
TestCase{args: vec!{"-x", TEST_FILE}, before: 0o777, after: 0o666},
};
run_tests(tests);
}