From e8f20958908000798d33c3362b9d129f4bb57e22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=AB=8F=E8=A8=AA=E5=AD=90?= <suwako@076.moe>
Date: Sun, 9 Jul 2023 06:47:46 +0900
Subject: [PATCH] pwd

---
 CHANGELOG.md |  1 +
 Makefile     |  2 ++
 pwd/Makefile | 13 +++++++++
 pwd/pwd.zig  | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 91 insertions(+)
 create mode 100644 pwd/Makefile
 create mode 100644 pwd/pwd.zig

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f7ca2b0..8c1c0bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,5 +2,6 @@
 * catを追加
 * cpを追加
 * lsを追加
+* pwdを追加（完了）
 * rmを追加（完了）
 * touchを追加
diff --git a/Makefile b/Makefile
index 748be86..47c16d4 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,7 @@ all:
 	cd cat && make && mv cat ../bin && rm -rf cat.o && cd ..
 	cd cp && make && mv cp ../bin && rm -rf cp.o && cd ..
 	cd ls && make && mv ls ../bin && rm -rf ls.o && cd ..
+	cd pwd && make && mv pwd ../bin && rm -rf pwd.o && cd ..
 	cd rm && make && mv rm ../bin && rm -rf rm.o && cd ..
 	cd touch && make && mv touch ../bin && rm -rf touch.o && cd ..
 
@@ -20,6 +21,7 @@ install: all
 	chmod 755 ${DESTDIR}${PREFIX}/bin/cat
 	chmod 755 ${DESTDIR}${PREFIX}/bin/cp
 	chmod 755 ${DESTDIR}${PREFIX}/bin/ls
+	chmod 755 ${DESTDIR}${PREFIX}/bin/pwd
 	chmod 755 ${DESTDIR}${PREFIX}/bin/rm
 	chmod 755 ${DESTDIR}${PREFIX}/bin/touch
 	#mkdir -p ${DESTDIR}${MANPREFIX}/man1
diff --git a/pwd/Makefile b/pwd/Makefile
new file mode 100644
index 0000000..e0e663c
--- /dev/null
+++ b/pwd/Makefile
@@ -0,0 +1,13 @@
+NAME=pwd
+VERSION := $(shell cat ../Makefile | grep "VERSION=" | sed 's/VERSION=//')
+SRC=${NAME}.zig
+CC=zig build-exe
+RELEASE=ReleaseSmall
+
+all:
+	${CC} ${SRC} -O ${RELEASE} --name ${NAME}
+
+clean:
+	rm -f ${NAME} ${NAME}.o
+
+.PHONY: all clean
diff --git a/pwd/pwd.zig b/pwd/pwd.zig
new file mode 100644
index 0000000..23cbb9a
--- /dev/null
+++ b/pwd/pwd.zig
@@ -0,0 +1,75 @@
+const std = @import("std");
+const io = std.io;
+const os = std.os;
+const fs = std.fs;
+
+const version = "1.0.0";
+
+fn help() !void {
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    try stdout.print("076 coreutils\n", .{});
+    try stdout.print("使用法: pwd\n", .{});
+    try stdout.print("現在のパスを表示する。\n\n", .{});
+    try stdout.print("-h ヘルプを表示\n", .{});
+    try stdout.print("-v バージョンを表示\n", .{});
+
+    try bw.flush();
+}
+
+fn ver() !void {
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    try stdout.print("pwd (076 coreutils) {s}\n", .{version});
+
+    try bw.flush();
+}
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const alloc = gpa.allocator();
+
+    var option = std.ArrayList(u8).init(alloc);
+    defer option.deinit();
+
+    const args = try std.process.argsAlloc(alloc);
+    defer std.process.argsFree(alloc, args);
+
+    for (args, 0..) |arg, i| {
+        if (i == 0) continue;
+        var m: [1]u8 = [_]u8{'-'};
+        if (std.mem.eql(u8, arg[0..1], m[0..])) {
+            for (arg, 0..) |a, j| {
+                if (j == 0) continue;
+                try option.append(a);
+            }
+        }
+    }
+
+    for (option.items) |i| {
+        if (i == 'h') {
+            try help();
+            return;
+        }
+        if (i == 'v') {
+            try ver();
+            return;
+        }
+    }
+
+    var buf: [fs.MAX_PATH_BYTES]u8 = undefined;
+    const cwd = fs.cwd();
+    const path = try cwd.realpath(".", &buf);
+
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    try stdout.print("{s}\n", .{std.mem.trim(u8, path, "\x00")});
+    try bw.flush();
+}