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#[macro_use]
extern crate uucore;
use clap::{App, Arg};
use std::fs;
use std::path::PathBuf;
use uucore::fs::{canonicalize, CanonicalizeMode};
static ABOUT: &str = "print the resolved path";
static VERSION: &str = env!("CARGO_PKG_VERSION");
static OPT_QUIET: &str = "quiet";
static OPT_STRIP: &str = "strip";
static OPT_ZERO: &str = "zero";
static ARG_FILES: &str = "files";
fn get_usage() -> String {
format!("{0} [OPTION]... FILE...", executable!())
}
pub fn uumain(args: impl uucore::Args) -> i32 {
let usage = get_usage();
let matches = App::new(executable!())
.version(VERSION)
.about(ABOUT)
.usage(&usage[..])
.arg(
Arg::with_name(OPT_QUIET)
.short("q")
.long(OPT_QUIET)
.help("Do not print warnings for invalid paths"),
)
.arg(
Arg::with_name(OPT_STRIP)
.short("s")
.long(OPT_STRIP)
.help("Only strip '.' and '..' components, but don't resolve symbolic links"),
)
.arg(
Arg::with_name(OPT_ZERO)
.short("z")
.long(OPT_ZERO)
.help("Separate output filenames with \\0 rather than newline"),
)
.arg(
Arg::with_name(ARG_FILES)
.multiple(true)
.takes_value(true)
.required(true)
.min_values(1),
)
.get_matches_from(args);
let paths: Vec<PathBuf> = matches
.values_of(ARG_FILES)
.unwrap()
.map(PathBuf::from)
.collect();
let strip = matches.is_present(OPT_STRIP);
let zero = matches.is_present(OPT_ZERO);
let quiet = matches.is_present(OPT_QUIET);
let mut retcode = 0;
for path in &paths {
if !resolve_path(path, strip, zero, quiet) {
retcode = 1
};
}
retcode
}
fn resolve_path(p: &PathBuf, strip: bool, zero: bool, quiet: bool) -> bool {
let abs = canonicalize(p, CanonicalizeMode::Normal).unwrap();
if strip {
if zero {
print!("{}\0", p.display());
} else {
println!("{}", p.display())
}
return true;
}
let mut result = PathBuf::new();
let mut links_left = 256;
for part in abs.components() {
result.push(part.as_os_str());
loop {
if links_left == 0 {
if !quiet {
show_error!("Too many symbolic links: {}", p.display())
};
return false;
}
match fs::metadata(result.as_path()) {
Err(_) => break,
Ok(ref m) if !m.file_type().is_symlink() => break,
Ok(_) => {
links_left -= 1;
match fs::read_link(result.as_path()) {
Ok(x) => {
result.pop();
result.push(x.as_path());
}
_ => {
if !quiet {
show_error!("Invalid path: {}", p.display())
};
return false;
}
}
}
}
}
}
if zero {
print!("{}\0", result.display());
} else {
println!("{}", result.display());
}
true
}