libos: Remove some shared pointers and change them to owned/live on the stack

Also, create the socket after dropping privileges.

README.md

@@ -1,5 +1,5 @@
 # Luna
-A very basic POSIX-based operating system for personal computers, written in C++. [![Build Status](https://drone.cloudapio.eu/api/badges/apio/Luna/status.svg)](https://drone.cloudapio.eu/apio/Luna)
+A simple POSIX-based operating system for personal computers, written in C++. [![Build Status](https://drone.cloudapio.eu/api/badges/apio/Luna/status.svg)](https://drone.cloudapio.eu/apio/Luna)
 
 ## Another UNIX clone?
 [Yes, another UNIX clone](https://wiki.osdev.org/User:Sortie/Yes_Another_Unix_Clone).
@@ -8,16 +8,18 @@ A very basic POSIX-based operating system for personal computers, written in C++
 - x86_64-compatible lightweight [kernel](kernel/).
 - Preemptive multitasking, with a round-robin [scheduler](kernel/src/thread/).
 - [Virtual file system](kernel/src/fs/) with a simple [tmpfs](kernel/src/fs/tmpfs/) and read-only [ext2](kernel/src/fs/ext2/) support.
-- Can [load ELF programs](kernel/src/thread/ELF.cpp) from the file system as userspace tasks.
+- Can [load ELF programs](kernel/src/binfmt/ELF.cpp), [shebang scripts](kernel/src/binfmt/Script.cpp) or [arbitrary binary formats](kernel/src/binfmt/BinaryFormat.h) (registered through kernel modules, which are not supported yet =D).
 - Boots from an [ext2](apps/preinit.cpp) root filesystem (a bit slow for now).
-- [System call](kernel/src/sys/) interface and [C Library](libc/), aiming to be mostly POSIX-compatible.
+- [System call](kernel/src/sys/) interface and [C Library](libc/), aiming to be almost POSIX-compatible.
+- Support for [several third-party programs](ports/), including the [GNU binutils](ports/binutils/PACKAGE) suite of utilities.
 - POSIX [signal](libc/src/signal.cpp) support.
 - Designed to be [portable](kernel/src/arch), no need to be restricted to x86_64.
-- Designed around [UTF-8](libluna/include/luna/Utf8.h).
+- Everything is [UTF-8](libluna/include/luna/Utf8.h).
 - [UNIX local domain sockets](kernel/src/net/UnixSocket.cpp), allowing for local IPC.
+- [POSIX shared memory](libc/include/sys/mman.h) support.
 - Environment-agnostic [utility library](libluna/), which can be used in both kernel and userspace.
-- Return-oriented [error propagation](libluna/include/luna/Result.h), inspired by Rust and SerenityOS.
-- Build system uses [CMake](CMakeLists.txt).
+- Return-oriented [error propagation](libluna/include/luna/Result.h), inspired by Rust and SerenityOS. No exceptions here :).
+- An extensive set of [standard Unix utilities](apps/), from [ls](apps/ls.cpp) to [uname](apps/uname.cpp) to [base64](apps/base64.cpp). Written in modern C++ and very small amounts of code, using Luna's practical [OS library](libos/).
 
 ## Setup
 

apps/CMakeLists.txt

@@ -46,4 +46,5 @@ luna_app(socket-test.cpp socket-test)
 luna_app(socket-client.cpp socket-client)
 luna_app(input.cpp input)
 luna_app(shmem-test.cpp shmem-test)
+luna_app(touch.cpp touch)
 luna_app(gclient.cpp gclient)

apps/stat.cpp

@@ -2,7 +2,7 @@
 #include <os/FileSystem.h>
 #include <os/Mode.h>
 #include <stdio.h>
-#include <sys/stat.h>
+#include <time.h>
 
 static const char* file_type(mode_t mode)
 {
@@ -36,10 +36,20 @@ Result<int> luna_main(int argc, char** argv)
     char buf[11];
     os::format_mode(st.st_mode, buf);
 
+    char atime[256];
+    strftime(atime, sizeof(atime), "%Y-%m-%d %H:%M:%S", gmtime(&st.st_atim.tv_sec));
+    char mtime[256];
+    strftime(mtime, sizeof(mtime), "%Y-%m-%d %H:%M:%S", gmtime(&st.st_mtim.tv_sec));
+    char ctime[256];
+    strftime(ctime, sizeof(ctime), "%Y-%m-%d %H:%M:%S", gmtime(&st.st_ctim.tv_sec));
+
     printf("  File: %s\n", path.chars());
     printf("  Size: %zu (%s)\n", st.st_size, file_type(st.st_mode));
-    printf("Inode: %lu Links: %lu\n", st.st_ino, st.st_nlink);
+    printf(" Inode: %lu Links: %lu\n", st.st_ino, st.st_nlink);
     printf("  Mode: (%#o/%s) UID: %u GID: %u\n", st.st_mode & ~S_IFMT, buf, st.st_uid, st.st_gid);
+    printf("Access: %s.%.9ld\n", atime, st.st_atim.tv_nsec);
+    printf("Modify: %s.%.9ld\n", mtime, st.st_mtim.tv_nsec);
+    printf("Change: %s.%.9ld\n", ctime, st.st_ctim.tv_nsec);
 
     return 0;
 }

apps/touch.cpp

@@ -0,0 +1,47 @@
+#include <errno.h>
+#include <os/ArgumentParser.h>
+#include <os/File.h>
+#include <sys/stat.h>
+
+Result<int> luna_main(int argc, char** argv)
+{
+    Vector<StringView> files;
+
+    bool only_atime { false };
+    bool only_mtime { false };
+    bool no_create { false };
+    bool no_dereference { false };
+
+    os::ArgumentParser parser;
+    parser.add_description("Update the access and modification times of files."_sv);
+    parser.add_system_program_info("touch"_sv);
+    parser.set_vector_argument(files, "files", true);
+    parser.add_switch_argument(only_atime, 'a', ""_sv, "change only the access time"_sv);
+    parser.add_switch_argument(no_create, 'c', "no-create"_sv, "do not create new files"_sv);
+    parser.add_switch_argument(no_dereference, 'h', "no-dereference"_sv, "do not follow symbolic links"_sv);
+    parser.add_switch_argument(only_mtime, 'm', ""_sv, "change only the modification time"_sv);
+    TRY(parser.parse(argc, argv));
+
+    if (only_atime && only_mtime)
+    {
+        os::eprintln("%s: only one of -a and -m can be specified.", argv[0]);
+        parser.short_usage(argv[0]);
+    }
+
+    struct timespec times[2] = {
+        { .tv_sec = 0, .tv_nsec = only_mtime ? UTIME_OMIT : UTIME_NOW },
+        { .tv_sec = 0, .tv_nsec = only_atime ? UTIME_OMIT : UTIME_NOW },
+    };
+
+    for (auto& filename : files)
+    {
+        SharedPtr<os::File> file;
+        if (no_create) file = TRY(os::File::open(filename, os::File::ReadOnly));
+        else
+            file = TRY(os::File::open_or_create(filename, os::File::ReadOnly));
+
+        if (futimens(file->fd(), times, no_dereference ? AT_SYMLINK_NOFOLLOW : 0) < 0) return err(errno);
+    }
+
+    return 0;
+}

kernel/src/fs/ext2/FileSystem.cpp

@@ -57,6 +57,9 @@ namespace Ext2
         inode->m_metadata.nlinks = inode->m_raw_inode.nlinks;
         inode->m_metadata.uid = inode->m_raw_inode.uid;
         inode->m_metadata.gid = inode->m_raw_inode.gid;
+        inode->m_metadata.atime = { .tv_sec = inode->m_raw_inode.atime, .tv_nsec = 0 };
+        inode->m_metadata.mtime = { .tv_sec = inode->m_raw_inode.mtime, .tv_nsec = 0 };
+        inode->m_metadata.ctime = { .tv_sec = inode->m_raw_inode.create_time, .tv_nsec = 0 };
 
 #ifdef EXT2_DEBUG
         kdbgln("ext2: Read inode %lu with mode %#x (%#x + %#o), size %lu", inum, inode->m_raw_inode.mode,

kernel/src/fs/tmpfs/FileSystem.cpp

@@ -1,4 +1,5 @@
 #include "fs/tmpfs/FileSystem.h"
+#include "arch/Timer.h"
 #include "fs/devices/DeviceRegistry.h"
 #include "fs/tmpfs/Inode.h"
 #include <luna/Alloc.h>
@@ -26,6 +27,7 @@ namespace TmpFS
         inode->set_fs(*this, {});
         inode->set_inode_number(m_next_inode_number++, {});
         inode->m_metadata.mode = mode;
+        inode->m_metadata.atime = inode->m_metadata.ctime = inode->m_metadata.mtime = *Timer::realtime_clock();
         return (SharedPtr<VFS::Inode>)inode;
     }
 
@@ -35,6 +37,7 @@ namespace TmpFS
         inode->set_fs(*this, {});
         TRY(inode->set_link(link, {}));
         inode->set_inode_number(m_next_inode_number++, {});
+        inode->m_metadata.atime = inode->m_metadata.ctime = inode->m_metadata.mtime = *Timer::realtime_clock();
         return (SharedPtr<VFS::Inode>)inode;
     }
 
@@ -49,6 +52,7 @@ namespace TmpFS
         inode->set_fs(*this, {});
         inode->set_inode_number(m_next_inode_number++, {});
         inode->m_metadata.mode = mode;
+        inode->m_metadata.atime = inode->m_metadata.ctime = inode->m_metadata.mtime = *Timer::realtime_clock();
 
         return (SharedPtr<VFS::Inode>)inode;
     }
@@ -65,6 +69,8 @@ namespace TmpFS
         // device ID atm.
         inode->set_device_id(luna_dev_makedev(major, minor), {});
         inode->m_metadata.mode = mode;
+        inode->m_metadata.atime = inode->m_metadata.ctime = inode->m_metadata.mtime = *Timer::realtime_clock();
+        inode->m_metadata.size = device->size();
 
         return (SharedPtr<VFS::Inode>)inode;
     }

kernel/src/fs/tmpfs/Inode.cpp

@@ -45,6 +45,8 @@ namespace TmpFS
 
         inode->did_link();
 
+        m_metadata.mtime = *Timer::realtime_clock();
+
         return {};
     }
 
@@ -61,6 +63,8 @@ namespace TmpFS
 
         inode->did_unlink();
 
+        m_metadata.mtime = *Timer::realtime_clock();
+
         return {};
     }
 
@@ -114,6 +118,8 @@ namespace TmpFS
 
         m_metadata.size = m_data_buffer.size();
 
+        m_metadata.mtime = *Timer::realtime_clock();
+
         return length;
     }
 
@@ -127,6 +133,8 @@ namespace TmpFS
 
         m_metadata.size = m_data_buffer.size();
 
+        m_metadata.mtime = *Timer::realtime_clock();
+
         return {};
     }
 

kernel/src/sys/file.cpp

@@ -4,9 +4,11 @@
 #include "memory/MemoryManager.h"
 #include "sys/Syscall.h"
 #include "thread/Scheduler.h"
+#include <bits/atfile.h>
 #include <bits/fcntl.h>
 #include <bits/open-flags.h>
 #include <bits/seek.h>
+#include <bits/utime.h>
 #include <luna/SafeArithmetic.h>
 #include <sys/types.h>
 
@@ -262,3 +264,58 @@ Result<u64> sys_ftruncate(Registers*, SyscallArgs args)
 
     return 0;
 }
+
+Result<u64> sys_utimensat(Registers*, SyscallArgs args)
+{
+    int dirfd = (int)args[0];
+    auto path = TRY(MemoryManager::strdup_from_user(args[1]));
+    const auto* times = (const struct timespec*)args[2];
+    int flags = (int)args[3];
+
+    auto* current = Scheduler::current();
+    auto inode = TRY(current->resolve_atfile(dirfd, path, flags & AT_EMPTY_PATH, !(flags & AT_SYMLINK_NOFOLLOW)));
+
+    struct timespec ktimes[2];
+    ktimes[0].tv_sec = ktimes[1].tv_sec = 0;
+    ktimes[0].tv_nsec = ktimes[1].tv_nsec = UTIME_NOW;
+
+    if (times && !MemoryManager::copy_from_user(times, ktimes, sizeof(ktimes))) return err(EFAULT);
+
+    // No permission checks are performed, since no actual modification is done, but the above checks are still
+    // performed.
+    if (ktimes[0].tv_nsec == UTIME_OMIT && ktimes[1].tv_nsec == UTIME_OMIT) return 0;
+
+    bool allow_write_access = ktimes[0].tv_nsec == UTIME_NOW && ktimes[1].tv_nsec == UTIME_NOW;
+
+    if (allow_write_access)
+    {
+        if (!VFS::can_write(inode, current->auth) && current->auth.euid != inode->metadata().uid &&
+            current->auth.euid != 0)
+            return err(EACCES);
+    }
+    else if (current->auth.euid != inode->metadata().uid && current->auth.euid != 0)
+        return err(EPERM);
+
+    auto metadata = inode->metadata();
+    if (ktimes[0].tv_nsec != UTIME_OMIT)
+    {
+        if (ktimes[0].tv_nsec == UTIME_NOW) metadata.atime = *Timer::realtime_clock();
+        else
+        {
+            if (ktimes[0].tv_nsec < 0 || ktimes[0].tv_nsec > 999'999'999) return err(EINVAL);
+            metadata.atime = ktimes[0];
+        }
+    }
+    if (ktimes[1].tv_nsec != UTIME_OMIT)
+    {
+        if (ktimes[1].tv_nsec == UTIME_NOW) metadata.mtime = *Timer::realtime_clock();
+        else
+        {
+            if (ktimes[1].tv_nsec < 0 || ktimes[1].tv_nsec > 999'999'999) return err(EINVAL);
+            metadata.mtime = ktimes[1];
+        }
+    }
+    TRY(inode->set_metadata(metadata));
+
+    return 0;
+}

kernel/src/sys/stat.cpp

@@ -48,6 +48,9 @@ Result<u64> sys_fstatat(Registers*, SyscallArgs args)
     kstat.st_size = metadata.size;
     kstat.st_dev = inode->fs() ? inode->fs()->host_device_id() : 0;
     kstat.st_rdev = metadata.devid;
+    kstat.st_atim = metadata.atime;
+    kstat.st_mtim = metadata.mtime;
+    kstat.st_ctim = metadata.ctime;
 
     if (!MemoryManager::copy_to_user_typed(st, &kstat)) return err(EFAULT);
 

libc/CMakeLists.txt

@@ -23,6 +23,8 @@ set(SOURCES
     src/scanf.cpp
     src/signal.cpp
     src/termios.cpp
+    src/utime.cpp
+    src/strtod.cpp
     src/sys/stat.cpp
     src/sys/mman.cpp
     src/sys/wait.cpp

libc/include/bits/struct_stat.h

@@ -3,6 +3,7 @@
 #ifndef _BITS_STRUCT_STAT_H
 #define _BITS_STRUCT_STAT_H
 
+#include <bits/timespec.h>
 #include <sys/types.h>
 
 struct stat
@@ -15,10 +16,13 @@ struct stat
     gid_t st_gid;
     off_t st_size;
     dev_t st_rdev;
-    // FIXME: Actually fill these fields in.
-    time_t st_atime;
-    time_t st_mtime;
-    time_t st_ctime;
+    struct timespec st_atim;
+    struct timespec st_mtim;
+    struct timespec st_ctim;
+
+#define st_atime st_atim.tv_sec
+#define st_mtime st_mtim.tv_sec
+#define st_ctime st_ctim.tv_sec
 };
 
 #endif

libc/include/bits/utime.h

@@ -0,0 +1,9 @@
+/* bits/utime.h: Definitions for UTIME_NOW and UTIME_OMIT. */
+
+#ifndef _BITS_UTIME_H
+#define _BITS_UTIME_H
+
+#define UTIME_NOW -1
+#define UTIME_OMIT -2
+
+#endif

libc/include/stdlib.h

@@ -84,9 +84,11 @@ extern "C"
     /* Parse a decimal integer from a string. */
     long long atoll(const char* s);
 
-    double atof(const char*);
+    /* Parse a floating-point number from a string. */
+    double atof(const char* str);
 
-    double strtod(const char*, char**);
+    /* Parse a floating-point number from a string. */
+    double strtod(const char* str, char** endptr);
 
     /* Parse an integer of the specified base from a string, storing the first non-number character in endptr if
      * nonnull. */

libc/include/string.h

@@ -95,6 +95,9 @@ extern "C"
     /* Compare two fixed-size null-terminated strings, ignoring case. */
     int strncasecmp(const char* a, const char* b, size_t max);
 
+    /* Compare two null-terminated strings according to the current locale. */
+    int strcoll(const char* a, const char* b);
+
 #ifdef __cplusplus
 }
 #endif

libc/include/sys/stat.h

@@ -5,6 +5,8 @@
 
 #include <bits/modes.h>
 #include <bits/struct_stat.h>
+#include <bits/timespec.h>
+#include <bits/utime.h>
 #include <sys/types.h>
 
 #ifdef __cplusplus
@@ -41,6 +43,12 @@ extern "C"
     /* Change the process's file creation mask. */
     mode_t umask(mode_t mask);
 
+    /* Change a file's access and modification timestamps, with nanosecond precision. */
+    int utimensat(int dirfd, const char* path, const struct timespec times[2], int flags);
+
+    /* Change a file's access and modification timestamps, with nanosecond precision. */
+    int futimens(int fd, const struct timespec times[2], int flags);
+
 #ifdef __cplusplus
 }
 #endif

libc/include/sys/time.h

@@ -16,6 +16,15 @@ extern "C"
     /* Get the current time of day. */
     __deprecated int gettimeofday(struct timeval* tp, void* timezone);
 
+    /* Change a file's access and modification timestamps, with microsecond precision. */
+    int utimes(const char* path, const struct timeval buf[2]);
+
+    /* Change a file descriptor's access and modification timestamps, with microsecond precision. */
+    int futimes(int fd, const struct timeval buf[2]);
+
+    /* Change a symlink's access and modification timestamps, with microsecond precision. */
+    int lutimes(const char* path, const struct timeval buf[2]);
+
 #ifdef __cplusplus
 }
 #endif

libc/include/utime.h

@@ -0,0 +1,26 @@
+/* utime.h: The utime function. */
+
+#ifndef _UTIME_H
+#define _UTIME_H
+
+#include <sys/types.h>
+
+struct utimbuf
+{
+    time_t actime;
+    time_t modtime;
+};
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /* Change a file's access and modification timestamps. */
+    int utime(const char* path, const struct utimbuf* buf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libc/src/stdlib.cpp

@@ -297,4 +297,9 @@ extern "C"
             if (errno != EEXIST) return -1;
         }
     }
+
+    double atof(const char* str)
+    {
+        return strtod(str, nullptr);
+    }
 }

libc/src/string.cpp

@@ -9,6 +9,12 @@ extern "C"
 
     extern "C++" const char* error_string(int);
 
+    int strcoll(const char* a, const char* b)
+    {
+        // In the POSIX or C locales strcoll() is equivalent to strcmp().
+        return strcmp(a, b);
+    }
+
     char* strerror(int errnum)
     {
         return const_cast<char*>(error_string(errnum));

libc/src/strtod.cpp

@@ -0,0 +1,141 @@
+/* vi:set ts=8 sts=4 sw=4: */
+/*
+ * strtod implementation.
+ * author: Yasuhiro Matsumoto
+ * license: public domain
+ *
+ * source from https://gist.github.com/mattn/1890186
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const char* skipwhite(const char* q)
+{
+    const char* p = q;
+    while (isspace(*p)) ++p;
+    return p;
+}
+
+extern "C"
+{
+    double strtod(const char* str, char** end)
+    {
+        double d = 0.0;
+        int sign;
+        int n = 0;
+        const char *p, *a;
+
+        a = p = str;
+        p = skipwhite(p);
+
+        /* decimal part */
+        sign = 1;
+        if (*p == '-')
+        {
+            sign = -1;
+            ++p;
+        }
+        else if (*p == '+')
+            ++p;
+        if (isdigit(*p))
+        {
+            d = (double)(*p++ - '0');
+            while (*p && isdigit(*p))
+            {
+                d = d * 10.0 + (double)(*p - '0');
+                ++p;
+                ++n;
+            }
+            a = p;
+        }
+        else if (*p != '.')
+            goto done;
+        d *= sign;
+
+        /* fraction part */
+        if (*p == '.')
+        {
+            double f = 0.0;
+            double base = 0.1;
+            ++p;
+
+            if (isdigit(*p))
+            {
+                while (*p && isdigit(*p))
+                {
+                    f += base * (*p - '0');
+                    base /= 10.0;
+                    ++p;
+                    ++n;
+                }
+            }
+            d += f * sign;
+            a = p;
+        }
+
+        /* exponential part */
+        if ((*p == 'E') || (*p == 'e'))
+        {
+            int e = 0;
+            ++p;
+
+            sign = 1;
+            if (*p == '-')
+            {
+                sign = -1;
+                ++p;
+            }
+            else if (*p == '+')
+                ++p;
+
+            if (isdigit(*p))
+            {
+                while (*p == '0') ++p;
+                if (*p == '\0') --p;
+                e = (int)(*p++ - '0');
+                while (*p && isdigit(*p))
+                {
+                    e = e * 10 + (int)(*p - '0');
+                    ++p;
+                }
+                e *= sign;
+            }
+            else if (!isdigit(*(a - 1)))
+            {
+                a = str;
+                goto done;
+            }
+            else if (*p == 0)
+                goto done;
+
+            if (d == 2.2250738585072011 && e == -308)
+            {
+                d = 0.0;
+                a = p;
+                errno = ERANGE;
+                goto done;
+            }
+            if (d == 2.2250738585072012 && e <= -308)
+            {
+                d *= 1.0e-308;
+                a = p;
+                goto done;
+            }
+            d *= __builtin_powi(10.0, e);
+            a = p;
+        }
+        else if (p > str && !isdigit(*(p - 1)))
+        {
+            a = str;
+            goto done;
+        }
+
+    done:
+        if (end) *end = const_cast<char*>(a);
+        return d;
+    }
+}

libc/src/sys/stat.cpp

@@ -52,4 +52,15 @@ extern "C"
     {
         return (mode_t)syscall(SYS_umask, mask);
     }
+
+    int utimensat(int dirfd, const char* path, const struct timespec* times, int flags)
+    {
+        long rc = syscall(SYS_utimensat, dirfd, path, times, flags);
+        __errno_return(rc, int);
+    }
+
+    int futimens(int fd, const struct timespec* times, int flags)
+    {
+        return utimensat(fd, "", times, flags | AT_EMPTY_PATH);
+    }
 }

libc/src/utime.cpp

@@ -0,0 +1,55 @@
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <utime.h>
+
+extern "C"
+{
+    int utime(const char* path, const struct utimbuf* buf)
+    {
+        if (!buf) return utimensat(AT_FDCWD, path, nullptr, 0);
+
+        struct timespec times[2] = {
+            { .tv_sec = buf->actime, .tv_nsec = 0 },
+            { .tv_sec = buf->modtime, .tv_nsec = 0 },
+        };
+
+        return utimensat(AT_FDCWD, path, times, 0);
+    }
+
+    int utimes(const char* path, const struct timeval* buf)
+    {
+        if (!buf) return utimensat(AT_FDCWD, path, nullptr, 0);
+
+        struct timespec times[2] = {
+            { .tv_sec = buf[0].tv_sec, .tv_nsec = buf[0].tv_usec * 1000 },
+            { .tv_sec = buf[1].tv_sec, .tv_nsec = buf[1].tv_usec * 1000 },
+        };
+
+        return utimensat(AT_FDCWD, path, times, 0);
+    }
+
+    int futimes(int fd, const struct timeval* buf)
+    {
+        if (!buf) return utimensat(fd, "", nullptr, AT_EMPTY_PATH);
+
+        struct timespec times[2] = {
+            { .tv_sec = buf[0].tv_sec, .tv_nsec = buf[0].tv_usec * 1000 },
+            { .tv_sec = buf[1].tv_sec, .tv_nsec = buf[1].tv_usec * 1000 },
+        };
+
+        return utimensat(fd, "", times, AT_EMPTY_PATH);
+    }
+
+    int lutimes(const char* path, const struct timeval* buf)
+    {
+        if (!buf) return utimensat(AT_FDCWD, path, nullptr, AT_SYMLINK_NOFOLLOW);
+
+        struct timespec times[2] = {
+            { .tv_sec = buf[0].tv_sec, .tv_nsec = buf[0].tv_usec * 1000 },
+            { .tv_sec = buf[1].tv_sec, .tv_nsec = buf[1].tv_usec * 1000 },
+        };
+
+        return utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW);
+    }
+}

libluna/include/luna/Syscall.h

@@ -8,7 +8,7 @@
                     _e(umount) _e(pstat) _e(getrusage) _e(symlinkat) _e(readlinkat) _e(umask) _e(linkat) _e(faccessat) \
                         _e(pivot_root) _e(sigreturn) _e(sigaction) _e(kill) _e(sigprocmask) _e(setpgid) _e(isatty)     \
                             _e(getpgid) _e(socket) _e(bind) _e(connect) _e(listen) _e(accept) _e(poll) _e(msync)       \
-                                _e(truncate) _e(ftruncate)
+                                _e(truncate) _e(ftruncate) _e(utimensat)
 
 enum Syscalls
 {

ports/README.md

@@ -12,6 +12,7 @@ Try to keep this list in alphabetical order.
 Name | Version | Description | URL
 ---|---|--- | ---
 bc | 6.6.0 | An implementation of the POSIX bc calculator | https://github.com/gavinhoward/bc
+binutils | 2.39 | The GNU suite of binary utilities | https://www.gnu.org/software/binutils
 minitar | 1.7.5 | Tiny and easy-to-use C library to read/write tar archives | https://git.cloudapio.eu/apio/minitar
 nasm | 2.16.01 | An assembler for the x86 CPU architecture | https://nasm.us 
 

ports/binutils/PACKAGE

@@ -0,0 +1,30 @@
+# Basic information
+name="binutils"
+version="2.39"
+
+# Download options
+format="tar"
+url="https://ftp.gnu.org/gnu/binutils/binutils-$version.tar.gz"
+output="binutils-$version.tar.gz"
+sha256sum="d12ea6f239f1ffe3533ea11ad6e224ffcb89eb5d01bbea589e9158780fa11f10"
+
+# Build instructions
+default_build_make=true
+
+do_patch()
+{
+    patch -ui $portdir/binutils.patch -p 1 -d $srcdir/..
+}
+
+do_configure()
+{
+    $srcdir/configure --host=$LUNA_ARCH-luna --disable-nls --disable-werror --enable-warn-rwx-segments=no --prefix=/usr --enable-gold=no --enable-ld=yes --enable-gprofng=no
+}
+
+do_install()
+{
+    make install
+
+    cd $installdir/usr/bin
+    $LUNA_ARCH-luna-strip size objdump ar strings ranlib objcopy addr2line readelf elfedit nm strip c++filt as gprof ld.bfd ld
+}

ports/binutils/binutils.patch

@@ -0,0 +1,117 @@
+diff --color -rN -u binutils-2.39/bfd/config.bfd build/binutils-2.39/bfd/config.bfd
+--- a/binutils-2.39/bfd/config.bfd	2022-01-22 13:14:07.000000000 +0100
++++ b/binutils-2.39/bfd/config.bfd	2022-10-01 22:12:16.914033792 +0200
+@@ -651,6 +651,11 @@
+     targ_selvecs="iamcu_elf32_vec i386_pei_vec"
+     targ64_selvecs="x86_64_elf64_vec x86_64_elf32_vec x86_64_pe_vec x86_64_pei_vec l1om_elf64_vec k1om_elf64_vec"
+     ;;
++  i[3-7]86-*-luna*)
++    targ_defvec=i386_elf32_vec
++    targ_selvecs=
++    targ64_selvecs=x86_64_elf64_vec
++    ;;
+   i[3-7]86-*-redox*)
+     targ_defvec=i386_elf32_vec
+     targ_selvecs=
+@@ -706,6 +711,11 @@
+     targ_selvecs="i386_elf32_vec iamcu_elf32_vec x86_64_elf32_vec i386_pei_vec x86_64_pe_vec x86_64_pei_vec l1om_elf64_vec k1om_elf64_vec"
+     want64=true
+     ;;
++  x86_64-*-luna*)
++    targ_defvec=x86_64_elf64_vec
++    targ_selvecs=i386_elf32_vec
++    want64=true
++    ;;
+   x86_64-*-mingw* | x86_64-*-pe | x86_64-*-pep | x86_64-*-cygwin)
+     targ_defvec=x86_64_pe_vec
+     targ_selvecs="x86_64_pe_vec x86_64_pei_vec x86_64_pe_big_vec x86_64_elf64_vec l1om_elf64_vec k1om_elf64_vec i386_pe_vec i386_pei_vec i386_elf32_vec iamcu_elf32_vec"
+diff --color -rN -u binutils-2.39/gas/configure.tgt build/binutils-2.39/gas/configure.tgt
+--- a/binutils-2.39/gas/configure.tgt	2022-01-22 13:14:08.000000000 +0100
++++ b/binutils-2.39/gas/configure.tgt	2022-10-01 22:12.39.115093972 +0200
+@@ -238,6 +238,7 @@
+       x86_64*-linux-gnux32)		arch=x86_64:32 ;;
+     esac ;;
+   i386-*-lynxos*)			fmt=elf em=lynx ;;
++  i386-*-luna*)			fmt=elf em=gnu ;;
+   i386-*-redox*)			fmt=elf ;;
+   i386-*-solaris*)			fmt=elf em=solaris ;;
+   i386-*-freebsd* \
+diff --color -rN -u binutils-2.39/ld/configure.tgt build/binutils-2.39/ld/configure.tgt
+--- a/binutils-2.39/ld/configure.tgt	2022-01-22 15:19:36.000000000 +0100
++++ b/binutils-2.39/ld/configure.tgt	2022-10-01 22:15:04.853571062 +0200
+@@ -329,6 +329,11 @@
+ 			targ64_extra_emuls="elf_x86_64 elf32_x86_64 elf_l1om elf_k1om"
+ 			targ64_extra_libpath="elf_x86_64 elf32_x86_64"
+ 			;;
++i[3-7]86-*-luna*)
++			targ_emul=elf_i386_luna
++			targ_extra_emuls=elf_i386
++			targ64_extra_emuls="elf_x86_64_luna elf_x86_64"
++			;;
+ i[3-7]86-*-redox*)	targ_emul=elf_i386
+ 			targ_extra_emuls=elf_x86_64
+ 			;;
+@@ -967,6 +972,10 @@
+ 			targ_extra_libpath="elf_i386 elf32_x86_64 elf_l1om elf_k1om"
+ 			tdir_elf_i386=`echo ${targ_alias} | sed -e 's/x86_64/i386/'`
+ 			;;
++x86_64-*-luna*)
++			targ_emul=elf_x86_64_luna
++			targ_extra_emuls="elf_i386_luna elf_x86_64 elf_i386"
++			;;
+ x86_64-*-redox*)	targ_emul=elf_x86_64
+ 			targ_extra_emuls=elf_i386
+ 			;;
+diff --color -rN -u binutils-2.39/ld/emulparams/elf_i386_luna.sh build/binutils-2.39/ld/emulparams/elf_i386_luna.sh
+--- a/dev/null	1970-01-01 01:00:00.000000000 +0100
++++ b/binutils-2.39/ld/emulparams/elf_i386_luna.sh	2022-10-01 21:52:12.394068335 +0200
+@@ -0,0 +1,3 @@
++source_sh ${srcdir}/emulparams/elf_i386.sh
++TEXT_START_ADDR=0x08000000
++MAXPAGESIZE=0x1000
+\ No newline at end of file
+diff --color -rN -u binutils-2.39/ld/emulparams/elf_x86_64_luna.sh build/binutils-2.39/ld/emulparams/elf_x86_64_luna.sh
+--- a/dev/null	1970-01-01 01:00:00.000000000 +0100
++++ b/binutils-2.39/ld/emulparams/elf_x86_64_luna.sh	2022-10-01 21:53:00.411200592 +0200
+@@ -0,0 +1,2 @@
++source_sh ${srcdir}/emulparams/elf_x86_64.sh
++MAXPAGESIZE=0x1000
+\ No newline at end of file
+diff --color -rN -u binutils-2.39/ld/Makefile.am build/binutils-2.39/ld/Makefile.am
+--- a/binutils-2.39/ld/Makefile.am	2022-01-22 13:14:09.000000000 +0100
++++ b/binutils-2.39/ld/Makefile.am	2022-10-01 22:18:02.660263017 +0200
+@@ -278,6 +278,7 @@
+ 	eelf32xtensa.c \
+ 	eelf32z80.c \
+ 	eelf_i386.c \
++	eelf_i386_luna.c \
+ 	eelf_i386_be.c \
+ 	eelf_i386_fbsd.c \
+ 	eelf_i386_haiku.c \
+@@ -464,6 +465,7 @@
+ 	eelf_x86_64_fbsd.c \
+ 	eelf_x86_64_haiku.c \
+ 	eelf_x86_64_sol2.c \
++	eelf_x86_64_luna.c \
+ 	ehppa64linux.c \
+ 	ei386pep.c \
+ 	emmo.c
+diff --color -rN -u binutils-2.39/ld/Makefile.in build/binutils-2.39/ld/Makefile.in
+--- a/binutils-2.39/ld/Makefile.in	2022-02-09 12:49:03.000000000 +0100
++++ b/binutils-2.39/ld/Makefile.in	2022-10-01 22:17:46.740196925 +0200
+@@ -769,6 +769,7 @@
+ 	eelf32xtensa.c \
+ 	eelf32z80.c \
+ 	eelf_i386.c \
++	eelf_i386_luna.c \
+ 	eelf_i386_be.c \
+ 	eelf_i386_fbsd.c \
+ 	eelf_i386_haiku.c \
+@@ -954,6 +955,7 @@
+ 	eelf_x86_64_fbsd.c \
+ 	eelf_x86_64_haiku.c \
+ 	eelf_x86_64_sol2.c \
++	eelf_x86_64_luna.c \
+ 	ehppa64linux.c \
+ 	ei386pep.c \
+ 	emmo.c

tools/make-iso.sh

@@ -7,6 +7,10 @@ cd $LUNA_ROOT
 
 fakeroot -u -s $LUNA_ROOT/.fakeroot -- tools/install.sh
 
-fakeroot -u -i $LUNA_ROOT/.fakeroot -- genext2fs -d base -B 4096 -b 8192 -L luna-rootfs -N 2048 build/ext2fs.bin
+disk_space=$(du -s base | awk '{ print $1 }')
+min_blocks=$(($disk_space / 4)) # This is just the blocks needed for all the files in the file system: this excludes space for the inode table, block group descriptors, etc.
+blocks=$(($min_blocks + 1024)) # This is the actual number of blocks we're using.
+
+fakeroot -u -i $LUNA_ROOT/.fakeroot -- genext2fs -d base -B 4096 -b $blocks -L luna-rootfs -N 1024 build/ext2fs.bin
 
 mkbootimg luna.json Luna.iso