Makefile

@@ -129,8 +129,8 @@ build/bin/npc: src/npc.c build
 
 .PHONY: pschdir
 pschdir: build/bin/pschdir
-build/bin/pschdir: src/pschdir.rs build
+build/bin/pschdir: src/pschdir.c build
-	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/pschdir.rs
+	$(CC) $(CFLAGS) -o $@ src/pschdir.c
 
 .PHONY: retval
 retval: build/bin/retval

src/pschdir.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2024 DTB <trinity@trinity.moe>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see https://www.gnu.org/licenses/.
+ */
+
+#include <errno.h> /* EACCESS, ELOOP, ENAMETOOLONG, ENOENT, ENOTDIR, errno */
+#include <stdio.h> /* fprintf(3), stderr */
+#include <string.h> /* strerror(3) */
+#include <sysexits.h> /* EX_OSERR, EX_NOPERM, EX_NOINPUT, EX_UNAVAILABLE,
+                       * EX_USAGE */
+#include <unistd.h> /* chdir(2) */
+
+char *program_name = "pschdir";
+
+int main(int argc, char *argv[]){
+	if (argc < 3) {
+		fprintf(stderr, "Usage: %s directory command [argument...]\n",
+			argv[0] == NULL ? program_name : argv[0]);
+		return EX_USAGE;
+	}
+
+	if(chdir(argv[1]) != 0){
+		fprintf(stderr, "%s: %s: %s\n", argv[0], argv[1], strerror(errno));
+
+		switch (errno) {
+			case ENAMETOOLONG:	return EX_OSERR;
+			case EACCES:      	return EX_NOPERM;
+			case ENOENT:
+			case ENOTDIR:     	return EX_NOINPUT;
+			default:          	return EX_UNAVAILABLE;
+		}
+	}
+
+	execvp(argv[2], &argv[2]);
+}

src/pschdir.rs

@@ -1,61 +0,0 @@
-/*
- * Copyright (c) 2023_2024 DTB <trinity@trinity.moe>
- * SPDX-License-Identifier: AGPL-3.0-or-later
- *
- * This program is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Affero General Public License as published by the Free
- * Software Foundation, either version 3 of the License, or (at your option) any
- * later version.
- * 
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see https://www.gnu.org/licenses/.
- */
-
-use std::{ env::args, io::Error, process::{ Command, ExitCode } };
-
-extern crate strerror;
-use strerror::StrError;
-
-extern crate sysexits;
-use sysexits::{ EX_UNAVAILABLE, EX_USAGE };
-
-fn error(p: &str, n: &str, e: Error) -> ExitCode {
-	eprintln!("{}: {}: {}", p, n, e.strerror());
-	ExitCode::from(EX_UNAVAILABLE as u8)
-}
-
-fn main() -> ExitCode {
-	let argv = args().collect::<Vec<String>>();
-
-	if argv.len() < 3 {
-		eprintln!("Usage: {} directory command [argument]", argv[0]);
-		return ExitCode::from(EX_USAGE as u8);
-	}
-
-	let cmdargs = argv.iter().clone().skip(3).collect::<Vec<&String>>();
-
-	match Command::new(argv[2].clone())
-			.current_dir(argv[1].clone())
-			.args(cmdargs)
-			.spawn() {
-		Ok(mut child) => match child.wait() {
-			Ok(status) => {
-				match status.code() {
-					Some(code) => ExitCode::from(code as u8),
-					None => {
-						eprintln!("{}: {}: process terminated by signal",
-							argv[0], argv[2]);
-						ExitCode::FAILURE
-					}
-				}
-			},
-			Err(e) => error(&argv[0], &argv[2], e)
-		},
-		Err(e) => error(&argv[0], &argv[2], e)
-	}
-}