added c-main dependency

Cargo.lock

@@ -30,6 +30,15 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "c-main"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "797bbff8bd2bcddb7f0ee638b55398686adac15174689a86da5ffc0f51219f75"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "cexpr"
 version = "0.6.0"
@@ -205,6 +214,7 @@ dependencies = [
 name = "tomcat"
 version = "0.0.1"
 dependencies = [
+ "c-main",
  "toml",
  "yacexits",
 ]

Cargo.toml

@@ -6,5 +6,6 @@ license = "AGPL-3.0-or-later"
 authors = [ "Emma Tebibyte <emma@tebibyte.media>" ]
 
 [dependencies]
+c-main = "1.0.1"
 toml = "0.5.9"
 yacexits = "0.1.2"

src/main.rs

@@ -16,8 +16,9 @@
  * along with this program. If not, see https://www.gnu.org/licenses/.
  */
 
+#![no_main]
+
 use std::{
-  env,
   fs::File,
   io::Read,
   iter::Peekable,
@@ -26,6 +27,7 @@ use std::{
   str::FromStr,
 };
 
+use c_main::Args;
 use toml::Value;
 use yacexits::*;
 
@@ -97,8 +99,9 @@ fn parse_toml(
   Ok(out)
 }
 
-fn main() {
+#[no_mangle]
-  let argv: Vec<String> = env::args().collect();
+fn rust_main(args: Args) {
+  let argv: Vec<&str> = args.into_iter().collect();
   let usage_info = format!("Usage: {} [table.]key[[index]] [file...]", argv[0]);
 
   if argv.len() <= 1 {
@@ -106,15 +109,11 @@ fn main() {
     exit(EX_USAGE);
   }
 
-  let input: &str;
+  let input = argv.get(2).unwrap_or(&"");
-
-  if let Some(arg) = argv.get(2) {
-    input = arg;
-  } else { input = &""; }
 
   let mut content = Vec::new();
   
-  match input {
+  match input.to_owned() {
     "-" | "" => unsafe { File::from_raw_fd(0) },
     _ => {
       File::open(Path::new(&input)).unwrap_or_else(|_| {