refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.

17 files changed, 0 insertions, 1114 deletions

diff --git a/src/user/cat.cc b/src/user/cat.cc
deleted file mode 100644
index b518d77..0000000
--- a/src/user/cat.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-char buf[512];
-
-void cat(int fd)
-{
-    int n;
-    while ((n = read(fd, buf, sizeof(buf))) > 0)
-    {
-        if (write(1, buf, n) != n)
-        {
-            printf("cat: write error\n");
-            exit(1);
-        }
-    }
-    if (n < 0)
-    {
-        printf("cat: read error\n");
-        exit(1);
-    }
-}
-
-int main(int argc, char *argv[])
-{
-    int fd, i;
-
-    if (argc <= 1)
-    {
-        cat(0);
-        exit(0);
-    }
-
-    for (i = 1; i < argc; i++)
-    {
-        if ((fd = open(argv[i], O_RDONLY)) < 0)
-        {
-            printf("cat: cannot open %s\n", argv[i]);
-            exit(1);
-        }
-        cat(fd);
-        close(fd);
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/cp.cc b/src/user/cp.cc
deleted file mode 100644
index ca35e82..0000000
--- a/src/user/cp.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-char buf[512];
-
-int main(int argc, char *argv[])
-{
-    int fd_src, fd_dst, n;
-
-    if (argc != 3)
-    {
-        printf("Usage: cp src dst\n");
-        exit(1);
-    }
-
-    if ((fd_src = open(argv[1], O_RDONLY)) < 0)
-    {
-        printf("cp: cannot open source %s\n", argv[1]);
-        exit(1);
-    }
-
-    if ((fd_dst = open(argv[2], O_WRONLY | O_CREATE | O_TRUNC)) < 0)
-    {
-        printf("cp: cannot create destination %s\n", argv[2]);
-        close(fd_src);
-        exit(1);
-    }
-
-    while ((n = read(fd_src, buf, sizeof(buf))) > 0)
-    {
-        if (write(fd_dst, buf, n) != n)
-        {
-            printf("cp: write error\n");
-            exit(1);
-        }
-    }
-
-    if (n < 0)
-    {
-        printf("cp: read error\n");
-    }
-
-    close(fd_src);
-    close(fd_dst);
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/echo.cc b/src/user/echo.cc
deleted file mode 100644
index cc9dc2a..0000000
--- a/src/user/echo.cc
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "user/user.h"
-#include "ulib/stdio.h"
-#include "ulib/string.h"
-
-int main(int argc, char* argv[])
-{
-    int i;
-
-    for (i = 1; i < argc; i++)
-    {
-        write(1, argv[i], strlen(argv[i]));
-        if (i + 1 < argc)
-        {
-            write(1, " ", 1);
-        }
-        else
-        {
-            write(1, "\n", 1);
-        }
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/entry.S b/src/user/entry.S
deleted file mode 100644
index 41e0964..0000000
--- a/src/user/entry.S
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (C) 2026 Richard Qin
-
-.section .text
-.global _start
-
-_start:
-    call main
-
-    call exit
-
-1:  j 1b
\ No newline at end of file
diff --git a/src/user/grep.cc b/src/user/grep.cc
deleted file mode 100644
index 1e1c42d..0000000
--- a/src/user/grep.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-char buf[1024];
-
-void grep(char *pattern, int fd)
-{
-    int n, m;
-    char *p, *q;
-
-    m = 0;
-    while ((n = read(fd, buf + m, sizeof(buf) - m - 1)) > 0)
-    {
-        m += n;
-        buf[m] = '\0';
-        p = buf;
-        while ((q = strchr(p, '\n')) != 0)
-        {
-            *q = 0;
-            if (strstr(p, pattern) != 0)
-            {
-                printf("%s\n", p);
-            }
-            p = q + 1;
-        }
-        if (p == buf)
-            m = 0;
-        if (m > 0)
-        {
-            m -= p - buf;
-            memmove(buf, p, m);
-        }
-    }
-}
-
-int main(int argc, char *argv[])
-{
-    int fd, i;
-    char *pattern;
-
-    if (argc < 2)
-    {
-        printf("Usage: grep pattern [file...]\n");
-        exit(1);
-    }
-    pattern = argv[1];
-
-    if (argc == 2)
-    {
-        grep(pattern, 0); // stdin
-        exit(0);
-    }
-
-    for (i = 2; i < argc; i++)
-    {
-        if ((fd = open(argv[i], O_RDONLY)) < 0)
-        {
-            printf("grep: cannot open %s\n", argv[i]);
-            exit(1);
-        }
-        grep(pattern, fd);
-        close(fd);
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/init.cc b/src/user/init.cc
deleted file mode 100644
index 376e697..0000000
--- a/src/user/init.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "drivers/uart_color.h"
-
-int main()
-{
-    char *argv[] = {(char *)"sh", 0};
-
-    printf(ANSI_BLUE "\n[Init] Starting Lume OS Shell..." ANSI_RESET);
-    printf("\n");
-
-    while (1)
-    {
-        // printf("fork start\n");
-        int pid = fork();
-        // printf("fork suceess, pid=%i\n", pid);
-        
-        if (pid < 0)
-        {
-            printf("[Init] fork failed!\n");
-            exit(1);
-        }
-
-        if (pid == 0)
-        {
-            
-            char sh_path[] = "/sh";
-            exec(sh_path, argv);
-
-            printf("[Init] exec sh failed\n");
-            return 0;
-            exit(1);
-        }
-        else
-        {
-            // break;
-            int status;
-            int wpid;
-            while (1)
-            {
-                wpid = wait((uint64)&status);
-
-                if (wpid == pid)
-                {
-                    printf("Shell Exit");
-                    break;
-                }
-                if (wpid < 0)
-                {
-                    printf("[Init] wait error or no child\n");
-
-                    break;
-                }
-            }
-        }
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/src/user/kill.cc b/src/user/kill.cc
deleted file mode 100644
index d38cdd6..0000000
--- a/src/user/kill.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-
-int main(int argc, char *argv[])
-{
-    int i;
-
-    if (argc < 2)
-    {
-        printf("Usage: kill pid...\n");
-        exit(1);
-    }
-    for (i = 1; i < argc; i++)
-    {
-        int pid = atoi(argv[i]);
-        if (kill(pid) < 0)
-        {
-            printf("kill: failed to kill %d\n", pid);
-        }
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/ln.cc b/src/user/ln.cc
deleted file mode 100644
index a21ddf9..0000000
--- a/src/user/ln.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-
-int main(int argc, char *argv[])
-{
-    if (argc != 3)
-    {
-        printf("Usage: ln old new\n");
-        exit(1);
-    }
-    if (link(argv[1], argv[2]) < 0)
-    {
-        printf("link %s %s failed\n", argv[1], argv[2]);
-        exit(1);
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/ls.cc b/src/user/ls.cc
deleted file mode 100644
index c44c799..0000000
--- a/src/user/ls.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-
-struct FAT32_DirEnt
-{
-    char name[11];
-    uint8 attr;
-    uint8 lcase;
-    uint8 ctime_cs;
-    uint16 ctime;
-    uint16 cdate;
-    uint16 adate;
-    uint16 fstClusHI;
-    uint16 wtime;
-    uint16 wdate;
-    uint16 fstClusLO;
-    uint32 fileSize;
-} __attribute__((packed));
-
-#define ATTR_DIRECTORY 0x10
-#define ATTR_LONG_NAME 0x0F
-
-void fmt_name(char *dst, const char *src)
-{
-    int i;
-    char *d = dst;
-
-    for (i = 0; i < 8; i++)
-    {
-        if (src[i] == ' ')
-            break;
-        *d++ = src[i];
-    }
-
-    if (src[8] != ' ')
-    {
-        *d++ = '.';
-        for (i = 8; i < 11; i++)
-        {
-            if (src[i] == ' ')
-                break;
-            *d++ = src[i];
-        }
-    }
-    *d = 0;
-
-    for (d = dst; *d; d++)
-    {
-        if (*d >= 'A' && *d <= 'Z')
-            *d += 32;
-    }
-}
-
-void ls(const char *path)
-{
-    int fd;
-    struct FAT32_DirEnt de;
-    char name_buf[16];
-
-    if ((fd = open(path, O_RDONLY)) < 0)
-    {
-        printf("ls: cannot open %s\n", path);
-        return;
-    }
-
-    while (read(fd, &de, sizeof(de)) == sizeof(de))
-    {
-        if (de.name[0] == 0)
-        {
-            break;
-        }
-
-        if ((unsigned char)de.name[0] == 0xE5)
-        {
-            continue;
-        }
-
-        if ((de.attr & ATTR_LONG_NAME) == ATTR_LONG_NAME)
-        {
-            continue;
-        }
-
-        fmt_name(name_buf, de.name);
-
-        printf("%s %d\t%s\n",
-               (de.attr & ATTR_DIRECTORY) ? "<DIR>" : "     ",
-               de.fileSize,
-               name_buf);
-    }
-
-    close(fd);
-}
-
-int main(int argc, char *argv[])
-{
-    if (argc < 2)
-    {
-        ls(".");
-    }
-    else
-    {
-        for (int i = 1; i < argc; i++)
-        {
-            ls(argv[i]);
-        }
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/mkdir.cc b/src/user/mkdir.cc
deleted file mode 100644
index 6da8b49..0000000
--- a/src/user/mkdir.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "user/user.h"
-
-int main(int argc, char* argv[])
-{
-    if (argc < 2)
-    {
-        printf("Usage: mkdir <dirname> ...\n");
-        exit(1);
-    }
-
-    for (int i = 1; i < argc; i++)
-    {
-        if (mkdir(argv[i]) < 0)
-        {
-            printf("mkdir: cannot create directory '%s'\n", argv[i]);
-        }
-    }
-
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/mv.cc b/src/user/mv.cc
deleted file mode 100644
index a196145..0000000
--- a/src/user/mv.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-
-int main(int argc, char *argv[])
-{
-    if (argc != 3)
-    {
-        printf("Usage: mv old new\n");
-        exit(1);
-    }
-
-    if (link(argv[1], argv[2]) < 0)
-    {
-        printf("mv: failed to link %s to %s\n", argv[1], argv[2]);
-        exit(1);
-    }
-
-    if (unlink(argv[1]) < 0)
-    {
-        printf("mv: failed to unlink %s\n", argv[1]);
-        exit(1);
-    }
-
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/rm.cc b/src/user/rm.cc
deleted file mode 100644
index 4777ade..0000000
--- a/src/user/rm.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-
-int main(int argc, char *argv[])
-{
-    int i;
-
-    if (argc < 2)
-    {
-        printf("Usage: rm files...\n");
-        exit(1);
-    }
-
-    for (i = 1; i < argc; i++)
-    {
-        if (unlink(argv[i]) < 0)
-        {
-            printf("rm: %s failed to delete\n", argv[i]);
-            exit(1);
-        }
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/sh.cc b/src/user/sh.cc
deleted file mode 100644
index 47aad9e..0000000
--- a/src/user/sh.cc
+++ /dev/null
@@ -1,423 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-#include "drivers/uart_color.h"
-
-constexpr int MAX_ARGS = 10;
-const char *WHITESPACE = " \t\r\n\v";
-const char *SYMBOLS = "<|>&;()";
-
-void panic(const char *s)
-{
-    printf("shell panic: %s\n", s);
-    exit(1);
-}
-
-int fork_or_panic()
-{
-    int pid = fork();
-    if (pid == -1)
-        panic("fork");
-    return pid;
-}
-
-struct Command
-{
-    virtual ~Command() = default;
-
-    virtual void run() = 0;
-};
-
-struct ExecCommand : public Command
-{
-    char *argv[MAX_ARGS];
-
-    ExecCommand()
-    {
-        memset(argv, 0, sizeof(argv));
-    }
-
-    void run() override
-    {
-        if (argv[0] == nullptr)
-            exit(1);
-
-        exec(argv[0], argv);
-
-        printf("exec %s failed\n", argv[0]);
-        exit(1);
-    }
-};
-
-struct RedirCommand : public Command
-{
-    Command *sub_cmd;
-    char *file;
-    char *efile; // file name end pointer (used by parser)
-    int mode;
-    int fd;
-
-    RedirCommand(Command *c, char *f, char *ef, int m, int fd_in)
-        : sub_cmd(c), file(f), efile(ef), mode(m), fd(fd_in) {}
-
-    ~RedirCommand() { delete sub_cmd; }
-
-    void run() override
-    {
-        close(fd);
-
-        int newfd = open(file, mode);
-
-        if (newfd < 0)
-        {
-            printf("open %s failed\n", file);
-            exit(1);
-        }
-
-        if (newfd != fd)
-        {
-
-            if (dup(newfd) != fd)
-            {
-                printf("Redirection failed: could not move fd %d to %d\n", newfd, fd);
-                exit(1);
-            }
-            close(newfd);
-        }
-
-        sub_cmd->run();
-    }
-};
-
-struct PipeCommand : public Command
-{
-    Command *left;
-    Command *right;
-
-    PipeCommand(Command *l, Command *r) : left(l), right(r) {}
-    ~PipeCommand()
-    {
-        delete left;
-        delete right;
-    }
-
-    void run() override
-    {
-        int p[2];
-        if (pipe(p) < 0)
-            panic("pipe");
-
-        if (fork_or_panic() == 0)
-        {
-            // Left child: write to pipe
-            close(1);  // close stdout
-            dup(p[1]); // dup write-end to stdout
-            close(p[0]);
-            close(p[1]);
-            left->run();
-        }
-
-        if (fork_or_panic() == 0)
-        {
-            // Right child: read from pipe
-            close(0);  // close stdin
-            dup(p[0]); // dup read-end to stdin
-            close(p[0]);
-            close(p[1]);
-            right->run();
-        }
-
-        close(p[0]);
-        close(p[1]);
-        wait(0);
-        wait(0);
-        exit(0);
-    }
-};
-
-struct ListCommand : public Command
-{
-    Command *left;
-    Command *right;
-
-    ListCommand(Command *l, Command *r) : left(l), right(r) {}
-    ~ListCommand()
-    {
-        delete left;
-        delete right;
-    }
-
-    void run() override
-    {
-        if (fork_or_panic() == 0)
-        {
-            left->run();
-        }
-        wait(0);
-        right->run();
-    }
-};
-
-struct BackCommand : public Command
-{
-    Command *sub_cmd;
-
-    BackCommand(Command *c) : sub_cmd(c) {}
-    ~BackCommand() { delete sub_cmd; }
-
-    void run() override
-    {
-        if (fork_or_panic() == 0)
-        {
-            sub_cmd->run();
-        }
-        // Parent doesn't wait
-        exit(0);
-    }
-};
-
-class Parser
-{
-public:
-    static Command *parse(char *s)
-    {
-        char *es = s + strlen(s);
-        Command *cmd = parse_line(&s, es);
-        peek(&s, es, "");
-        if (s != es)
-        {
-            printf("leftovers: %s\n", s);
-            // panic("syntax"); // strict syntax check
-        }
-        terminate_strings(cmd);
-        return cmd;
-    }
-
-private:
-    // Helper: NUL-terminate strings found during parsing
-    static void terminate_strings(Command *cmd)
-    {
-        if (!cmd)
-            return;
-    }
-
-    static char get_token(char **ps, char *es, char **q, char **eq)
-    {
-        char *s;
-        int ret;
-
-        s = *ps;
-        while (s < es && strchr(WHITESPACE, *s))
-            s++;
-        if (q)
-            *q = s;
-        ret = *s;
-        switch (*s)
-        {
-        case 0:
-            break;
-        case '|':
-        case '(':
-        case ')':
-        case ';':
-        case '&':
-        case '<':
-            s++;
-            break;
-        case '>':
-            s++;
-            if (*s == '>')
-            {
-                ret = '+';
-                s++;
-            }
-            break;
-        default:
-            ret = 'a';
-            while (s < es && !strchr(WHITESPACE, *s) && !strchr(SYMBOLS, *s))
-                s++;
-            break;
-        }
-        if (eq)
-            *eq = s;
-
-        while (s < es && strchr(WHITESPACE, *s))
-            s++;
-        *ps = s;
-        return ret;
-    }
-
-    static int peek(char **ps, char *es, const char *toks)
-    {
-        char *s = *ps;
-        while (s < es && strchr(WHITESPACE, *s))
-            s++;
-        *ps = s;
-        return *s && strchr(toks, *s);
-    }
-
-    // Recursive Descent Parsers
-
-    static Command *parse_line(char **ps, char *es)
-    {
-        Command *cmd = parse_pipe(ps, es);
-        while (peek(ps, es, "&"))
-        {
-            get_token(ps, es, 0, 0);
-            cmd = new BackCommand(cmd);
-        }
-        if (peek(ps, es, ";"))
-        {
-            get_token(ps, es, 0, 0);
-            cmd = new ListCommand(cmd, parse_line(ps, es));
-        }
-        return cmd;
-    }
-
-    static Command *parse_pipe(char **ps, char *es)
-    {
-        Command *cmd = parse_exec(ps, es);
-        if (peek(ps, es, "|"))
-        {
-            get_token(ps, es, 0, 0);
-            cmd = new PipeCommand(cmd, parse_pipe(ps, es));
-        }
-        return cmd;
-    }
-
-    static Command *parse_exec(char **ps, char *es)
-    {
-        char *q, *eq;
-        int tok, argc;
-        ExecCommand *cmd = new ExecCommand();
-        Command *ret = cmd;
-
-        argc = 0;
-        ret = parse_redirs(ret, ps, es);
-        while (!peek(ps, es, "|)&;"))
-        {
-            if ((tok = get_token(ps, es, &q, &eq)) == 0)
-                break;
-            if (tok != 'a')
-                panic("syntax");
-
-            cmd->argv[argc] = q;
-            *eq = 0; // Temp
-
-            argc++;
-            if (argc >= MAX_ARGS)
-                panic("too many args");
-            ret = parse_redirs(ret, ps, es);
-        }
-        cmd->argv[argc] = 0;
-        return ret;
-    }
-
-    static Command *parse_redirs(Command *cmd, char **ps, char *es)
-    {
-        int tok;
-        char *q, *eq;
-
-        while (peek(ps, es, "<>"))
-        {
-            tok = get_token(ps, es, 0, 0);
-            if (get_token(ps, es, &q, &eq) != 'a')
-                panic("missing file for redirection");
-
-            *eq = 0; // Null terminate filename immediately
-
-            switch (tok)
-            {
-            case '<':
-                cmd = new RedirCommand(cmd, q, eq, O_RDONLY, 0);
-                break;
-            case '>':
-                cmd = new RedirCommand(cmd, q, eq, O_WRONLY | O_CREATE | O_TRUNC, 1);
-                break;
-            case '+':                                                       // >>
-                cmd = new RedirCommand(cmd, q, eq, O_WRONLY | O_CREATE, 1); // Append not fully supported in simple OS yet?
-                break;
-            }
-        }
-        return cmd;
-    }
-};
-
-int getcmd(char *buf, int nbuf)
-{
-    write(1, "$ ", 2);
-    memset(buf, 0, nbuf);
-
-    int n = read(0, buf, nbuf - 1);
-
-    if (n < 0)
-        return -1;
-
-    buf[n] = 0;
-    return 0;
-}
-
-int main()
-{
-    static char buf[100];
-
-
-    printf(ANSI_GREEN "\n[Lume Shell] Welcome! \n" ANSI_RESET);
-    printf(ANSI_YELLOW "[Lume Shell] Start your journey of exploration!" ANSI_RESET);
-    printf("\n");
-
-    while (getcmd(buf, sizeof(buf)) >= 0)
-    {
-        int len = strlen(buf);
-        if (len > 0 && buf[len - 1] == '\n')
-        {
-            buf[len - 1] = 0;
-        }
-
-        if (buf[0] == 'c' && buf[1] == 'd' && (buf[2] == ' ' || buf[2] == '\n' || buf[2] == 0))
-        {
-            if (buf[strlen(buf) - 1] == '\n')
-                buf[strlen(buf) - 1] = 0;
-
-            char *path = buf + 3;
-            if (buf[2] == '\n' || buf[2] == 0)
-            {
-                printf("cd: argument missing\n");
-                continue;
-            }
-
-            if (chdir(path) < 0)
-            {
-                printf("cannot cd %s\n", path);
-            }
-            continue;
-        }
-        if (strcmp(buf, "shutdown") == 0 || strcmp(buf, "poweroff") == 0)
-        {
-            printf(ANSI_BLUE "System shutting down..." ANSI_RESET);
-            printf("\n");
-            shutdown();
-
-            continue;
-        }
-
-        if (fork_or_panic() == 0)
-        {
-            Command *cmd = Parser::parse(buf);
-            if (cmd)
-            {
-                cmd->run();
-                delete cmd;
-            }
-            exit(0);
-        }
-        wait(0);
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/src/user/touch.cc b/src/user/touch.cc
deleted file mode 100644
index 2f9f9f6..0000000
--- a/src/user/touch.cc
+++ /dev/null
@@ -1,31 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-int main(int argc, char *argv[])
-{
-    int i, fd;
-
-    if (argc < 2)
-    {
-        printf("Usage: touch files...\n");
-        exit(1);
-    }
-
-    for (i = 1; i < argc; i++)
-    {
-        fd = open(argv[i], O_CREATE | O_RDWR);
-        if (fd < 0)
-        {
-            printf("touch: cannot touch %s\n", argv[i]);
-            exit(1);
-        }
-        close(fd);
-    }
-    exit(0);
-}
\ No newline at end of file
diff --git a/src/user/user.ld b/src/user/user.ld
deleted file mode 100644
index f0a4b27..0000000
--- a/src/user/user.ld
+++ /dev/null
@@ -1,36 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (C) 2026 Richard Qin
-
-OUTPUT_ARCH( "riscv" )
-ENTRY( _start )
-
-SECTIONS
-{
-  . = 0x0;
-
-  .text : {
-    *(.text.entry)
-    *(.text .text.*)
-  }
-
-  .rodata : {
-    . = ALIGN(16);
-    *(.srodata .srodata.*)
-    . = ALIGN(16);
-    *(.rodata .rodata.*)
-  }
-
-  .data : {
-    . = ALIGN(16);
-    *(.sdata .sdata.*)
-    . = ALIGN(16);
-    *(.data .data.*)
-  }
-
-  .bss : {
-    . = ALIGN(16);
-    *(.sbss .sbss.*)
-    . = ALIGN(16);
-    *(.bss .bss.*)
-  }
-}
\ No newline at end of file
diff --git a/src/user/usys.S b/src/user/usys.S
deleted file mode 100644
index 1e373d3..0000000
--- a/src/user/usys.S
+++ /dev/null
@@ -1,38 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (C) 2026 Richard Qin
-
-#include "kernel/syscall.h"
-
-#define SYSCALL_NAME(name, sysname) \
-    .global name; \
-    name: \
-        li a7, SYS_ ## sysname; \
-        ecall; \
-        ret
-
-SYSCALL_NAME(sys_openat, openat)
-SYSCALL_NAME(sys_mknodat, mknodat)
-SYSCALL_NAME(sys_mkdirat, mkdirat)
-SYSCALL_NAME(sys_unlinkat, unlinkat)
-SYSCALL_NAME(sys_linkat, linkat)
-SYSCALL_NAME(sys_chdir, chdir)
-SYSCALL_NAME(sys_dup, dup)
-SYSCALL_NAME(sys_fstat, fstat)
-SYSCALL_NAME(sys_read, read)
-SYSCALL_NAME(sys_write, write)
-SYSCALL_NAME(sys_close, close)
-SYSCALL_NAME(sys_pipe2, pipe2)
-SYSCALL_NAME(sys_clone, clone)
-SYSCALL_NAME(sys_execve, execve)
-SYSCALL_NAME(sys_wait4, wait4)
-SYSCALL_NAME(sys_exit, exit)
-SYSCALL_NAME(sys_getpid, getpid)
-SYSCALL_NAME(sys_brk, brk)
-SYSCALL_NAME(sys_kill, kill)
-SYSCALL_NAME(sys_nanosleep, nanosleep)
-SYSCALL_NAME(sys_reboot, reboot)
-SYSCALL_NAME(sys_lseek, lseek)
-
-# === Custom / Debug Syscalls ===
-SYSCALL_NAME(sys_putc, putc)
-SYSCALL_NAME(sys_disk_test, disk_test)
\ No newline at end of file
diff --git a/src/user/wc.cc b/src/user/wc.cc
deleted file mode 100644
index fbe9735..0000000
--- a/src/user/wc.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "ulib/stdio.h"
-#include "ulib/stdlib.h"
-#include "ulib/string.h"
-#include "user/user.h"
-#include "common/fcntl.h"
-
-char buf[512];
-
-void wc(int fd, char *name)
-{
-    int i, n;
-    int l, w, c, inword;
-
-    l = w = c = 0;
-    inword = 0;
-    while ((n = read(fd, buf, sizeof(buf))) > 0)
-    {
-        for (i = 0; i < n; i++)
-        {
-            c++;
-            if (buf[i] == '\n')
-                l++;
-            if (strchr(" \r\t\n\v", buf[i]))
-                inword = 0;
-            else if (!inword)
-            {
-                w++;
-                inword = 1;
-            }
-        }
-    }
-    printf("%d %d %d %s\n", l, w, c, name);
-}
-
-int main(int argc, char *argv[])
-{
-    int fd, i;
-
-    if (argc <= 1)
-    {
-        wc(0, "");
-        exit(0);
-    }
-
-    for (i = 1; i < argc; i++)
-    {
-        if ((fd = open(argv[i], O_RDONLY)) < 0)
-        {
-            printf("wc: cannot open %s\n", argv[i]);
-            exit(1);
-        }
-        wc(fd, argv[i]);
-        close(fd);
-    }
-    exit(0);
-}
\ No newline at end of file