catを延長

CHANGELOG.md

@@ -1,8 +1,11 @@
 # 0.0.1
 * catを追加
 * cpを追加
+* echoを追加（完了）
+* groupsを追加（完了）
 * lsを追加
 * mkdirを追加（完了）
 * pwdを追加（完了）
 * rmを追加（完了）
 * touchを追加
+* whoamiを追加（完了）

cat.zig

@@ -13,8 +13,12 @@ fn help() !void {
     try stdout.print("使用法: cat [オプション]... [ファイル]...\n", .{});
     try stdout.print("ファイル (複数可) の内容を結合して標準出力に出力します。\n\n", .{});
     try stdout.print("ファイルの指定がない場合や FILE が - の場合, 標準入力から読み込みを行います。\n\n", .{});
+    try stdout.print("-b カッコの行列以外、全ての行に行番号を付ける\n", .{});
     //try stdout.print("-c 色\n", .{});
+    try stdout.print("-m 全部は１行列に表示する\n", .{});
     try stdout.print("-n 全ての行に行番号を付ける\n", .{});
+    try stdout.print("-s カッコの行列を見逃す\n", .{});
+    try stdout.print("-u 不使用\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", .{});
 
@@ -58,8 +62,12 @@ pub fn main() !void {
         }
     }
 
+    var isnun: bool = false;
     var iscol: bool = false;
+    var isone: bool = false;
     var isnum: bool = false;
+    var issqz: bool = false;
+    var line_number: usize = 0;
 
     for (option.items) |i| {
         if (i == 'h') {
@@ -70,12 +78,21 @@ pub fn main() !void {
             try ver();
             return;
         }
+        if (i == 'b') {
+            isnun = true;
+        }
         if (i == 'c') {
             iscol = true;
         }
+        if (i == 'd') {
+            isone = true;
+        }
         if (i == 'n') {
             isnum = true;
         }
+        if (i == 's') {
+            issqz = true;
+        }
     }
 
     if (fname.items.len == 0) {
@@ -89,9 +106,24 @@ pub fn main() !void {
 
         var buf: [1024]u8 = undefined;
         while (true) {
-            const br = try file.read(buf[0..]);
-            if (br == 0) break;
-            try io.getStdOut().writer().writeAll(buf[0..br]);
+            const result = try file.reader().readUntilDelimiterOrEof(buf[0..], '\n') orelse break;
+            if (issqz and std.mem.trimRight(u8, result, "\n\r").len == 0) continue;
+            const stripped = std.mem.trim(u8, result, " \n\t\r");
+
+            if (isone) {
+                try io.getStdOut().writer().writeAll(stripped);
+            } else {
+                if (isnum or (isnun and stripped.len != 0)) {
+                    line_number += 1;
+                    try io.getStdOut().writer().print("  {:3} | ", .{line_number});
+                } else if (isnum) {
+                    line_number += 1;
+                    try io.getStdOut().writer().print("  {:3} | ", .{line_number});
+                }
+
+                try io.getStdOut().writer().writeAll(result);
+                try io.getStdOut().writer().print("\n", .{});
+            }
         }
     }
 }

echo.zig

@@ -0,0 +1,85 @@
+const std = @import("std");
+const io = std.io;
+const os = std.os;
+
+const version = @import("version.zig").version;
+
+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: echo\n", .{});
+    try stdout.print("文章を表示\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 stdout.print("-n ニューラインを見逃す\n", .{});
+
+    try bw.flush();
+}
+
+fn ver() !void {
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    try stdout.print("echo (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);
+    var text: [1024]u8 = undefined;
+    var text_len: usize = 0;
+
+    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);
+            }
+        } else {
+            const length = std.math.min(arg.len, text.len - 1);
+            std.mem.copy(u8, text[0..length], arg[0..length]);
+            text_len = length;
+        }
+    }
+
+    var isnonl = false;
+    for (option.items) |i| {
+        if (i == 'h') {
+            try help();
+            return;
+        }
+        if (i == 'v') {
+            try ver();
+            return;
+        }
+        if (i == 'n') {
+            isnonl = true;
+        }
+    }
+
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    if (isnonl) {
+        try stdout.print("{s}", .{text[0..text_len]});
+    } else {
+        try stdout.print("{s}\n", .{text[0..text_len]});
+    }
+    try bw.flush();
+}

groups.zig

@@ -0,0 +1,165 @@
+const std = @import("std");
+const fs = std.fs;
+const io = std.io;
+const os = std.os;
+const mem = std.mem;
+
+const version = @import("version.zig").version;
+
+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: groups\n", .{});
+    try stdout.print("グループ名を表示\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("groups (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);
+    var username: [32]u8 = undefined;
+
+    for (args, 0..) |arg, i| {
+        if (i == 0) continue;
+        var m: [1]u8 = [_]u8{'-'};
+        if (mem.eql(u8, arg[0..1], m[0..])) {
+            for (arg, 0..) |a, j| {
+                if (j == 0) continue;
+                try option.append(a);
+            }
+        } else {
+            const length = std.math.min(arg.len, username.len - 1);
+            mem.copy(u8, username[0..length], arg[0..length]);
+            username[length] = 0;
+        }
+    }
+
+    for (option.items) |i| {
+        if (i == 'h') {
+            try help();
+            return;
+        }
+        if (i == 'v') {
+            try ver();
+            return;
+        }
+    }
+
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+    var buf: [4096]u8 = undefined;
+
+    if (username[0] == 0) {
+        const pfile = try fs.cwd().openFile("/etc/passwd", .{});
+        defer pfile.close();
+
+        const pstream = pfile.reader();
+        const preal = try pstream.readAll(&buf);
+
+        var plines = mem.split(u8, buf[0..preal], "\n");
+        while (plines.next()) |*line| {
+            var fields = mem.split(u8, line.*, ":");
+            var username_opt = fields.next();
+            _ = fields.next();
+            var uid_str_opt = fields.next();
+            if (username_opt != null and uid_str_opt != null) {
+                const puid = std.fmt.parseInt(u32, uid_str_opt.?, 10) catch continue;
+                if (puid == os.linux.getuid()) {
+                    if (username_opt) |username_slice| {
+                        mem.copy(u8, username[0..], username_slice);
+                    }
+                    break;
+                }
+            }
+        }
+    }
+
+    const cwd = fs.cwd();
+
+    const file = try cwd.openFile("/etc/group", .{});
+    defer file.close();
+
+    const stream = file.reader();
+    const real = try stream.readAll(&buf);
+    var user_found_in_group = false;
+
+    var lines = mem.split(u8, buf[0..real], "\n");
+    while (lines.next()) |*line| {
+        var fields = mem.split(u8, line.*, ":");
+        var group_opt = fields.next();
+        _ = fields.next();
+        _ = fields.next();
+        var users_str_opt = fields.next();
+        if (group_opt != null and users_str_opt != null) {
+            var users = mem.split(u8, users_str_opt.?, ",");
+            while (users.next()) |user| {
+                var user_length: usize = 0;
+                while (user[user_length] != ':' and user[user_length] != '\n') : (user_length += 1) {}
+                var username_length: usize = 0;
+                while (username[username_length] != 0) : (username_length += 1) {}
+
+                if (mem.eql(u8, user[0..user_length], username[0..username_length])) {
+                    try stdout.print("{s} ", .{group_opt.?});
+                }
+            }
+        }
+    }
+
+    var it = mem.split(u8, buf[0..real], "\n");
+    while (it.next()) |line| {
+        user_found_in_group = false;
+        var split = mem.split(u8, line, ":");
+
+        if (split.next()) |group| {
+            var group_length: usize = 0;
+            while (group[group_length] != ':' and group[group_length] != '\n') : (group_length += 1) {}
+            var username_length: usize = 0;
+            while (username[username_length] != 0) : (username_length += 1) {}
+
+            if (split.next()) |_| {
+                if (split.next()) |_| {
+                    if (split.next()) |users| {
+                        var users_list = mem.split(u8, users, ",");
+                        while (users_list.next()) |user| {
+                            var user_length: usize = 0;
+                            while (user[user_length] != ':' and user[user_length] != '\n') : (user_length += 1) {}
+                            if (std.mem.eql(u8, user[0..user_length], username[0..username_length])) {
+                                user_found_in_group = true;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (std.mem.eql(u8, group[0..group_length], username[0..username_length]) and !user_found_in_group) {
+                try stdout.print("{s} ", .{group});
+            }
+        }
+    }
+    try stdout.print("\n", .{});
+    try bw.flush();
+}

whoami.zig

@@ -0,0 +1,91 @@
+const std = @import("std");
+const fs = std.fs;
+const io = std.io;
+const os = std.os;
+
+const version = @import("version.zig").version;
+
+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: whoami\n", .{});
+    try stdout.print("ユーザー名を表示\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("whoami (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;
+        }
+    }
+
+    const stdof = io.getStdOut().writer();
+    var bw = io.bufferedWriter(stdof);
+    const stdout = bw.writer();
+
+    const file = try fs.cwd().openFile("/etc/passwd", .{});
+    defer file.close();
+
+    var buf: [4096]u8 = undefined;
+    const stream = file.reader();
+    const real = try stream.readAll(&buf);
+
+    var lines = std.mem.split(u8, buf[0..real], "\n");
+    while (lines.next()) |*line| {
+        var fields = std.mem.split(u8, line.*, ":");
+        var username_opt = fields.next();
+        _ = fields.next();
+        var uid_str_opt = fields.next();
+        if (username_opt != null and uid_str_opt != null) {
+            const puid = std.fmt.parseInt(u32, uid_str_opt.?, 10) catch continue;
+            if (puid == os.linux.getuid()) {
+                try stdout.print("{s}\n", .{username_opt.?});
+                try bw.flush();
+                return;
+            }
+        }
+    }
+}