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Makefile, fop(1): added argument parsing and -d option

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This commit is contained in:
Emma Tebibyte 2024-01-15 16:30:00 -07:00
parent 91e129b813
commit 52def0a32d
Signed by untrusted user: emma
GPG Key ID: 06FA419A1698C270
2 changed files with 30 additions and 9 deletions
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2
Makefile
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@ -65,7 +65,7 @@ sysexits: build
libgetopt: src/getopt-rs/lib.rs
$(RUSTC) $(RUSTCFLAGS) --crate-type=lib --crate-name=getopt \
-o build/o/libgetopt.rlib src/lib.rs
-o build/o/libgetopt.rlib src/getopt-rs/lib.rs
false: src/false.rs build
$(RUSTC) $(RUSTFLAGS) -o build/bin/false src/false.rs

37
src/fop.rs
View File

@ -18,33 +18,54 @@
use std::{
env::args,
io::{ stdin, Write },
io::{ Read, stdin, Write },
process::{ Command, exit, Stdio },
};
extern crate sysexits;
extern crate getopt;
use getopt::{ Opt, Parser };
use sysexits::{ EX_DATAERR, EX_USAGE };
fn main() {
let argv = args().collect::<Vec<String>>();
let mut d = '␞';
let mut arg_parser = Parser::new(&argv, "d:");
argv.get(2).unwrap_or_else(|| {
while let Some(opt) = arg_parser.next() {
match opt {
Ok(Opt('d', Some(arg))) => {
let arg_char = arg.chars().collect::<Vec<char>>();
if arg_char.len() > 1 {
eprintln!("{}: {}: Not a character.", argv[0], arg);
exit(EX_USAGE);
} else { d = arg_char[0]; }
},
_ => {},
};
}
let index_arg = arg_parser.index();
let command_arg = arg_parser.index() + 1;
argv.get(command_arg).unwrap_or_else(|| {
eprintln!("Usage: {} index command [args...]", argv[0]);
exit(EX_USAGE);
});
let index = argv[1].parse::<usize>().unwrap_or_else(|_| {
let index = argv[index_arg].parse::<usize>().unwrap_or_else(|_| {
eprintln!("{}: {}: Not an integer.", argv[0], argv[1]);
exit(EX_DATAERR);
});
let mut buf = String::new();
stdin().read_line(&mut buf).unwrap();
let mut fields = buf.split('␞').collect::<Vec<&str>>();
stdin().read_to_string(&mut buf).unwrap();
let mut fields = buf.split(d).collect::<Vec<&str>>();
let opts = argv.iter().clone().skip(3).collect::<Vec<&String>>();
let opts = argv.iter().clone().skip(command_arg + 1).collect::<Vec<&String>>();
let mut spawned = Command::new(argv.get(2).unwrap())
let mut spawned = Command::new(argv.get(command_arg).unwrap())
.args(opts)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
@ -71,5 +92,5 @@ fn main() {
fields[index] = &new_field;
print!("{}", fields.join("␞"));
print!("{}", fields.join(&d.to_string()));
}