Kernel: Make the serial port writable for everyone :)

Which is the same as %d.

kernel/include/thread/Task.h

@@ -103,6 +103,7 @@ struct Task
 
     bool is_still_blocking();
 
+    Descriptor* open_descriptor_from_fd(int fd, int& error);
     Descriptor* descriptor_from_fd(int fd, int& error);
 
     bool is_superuser();

kernel/src/fs/devices/Serial.cpp

@@ -16,7 +16,7 @@ VFS::Node* SerialDevice::create_new(const char* devname)
     dev->type = VFS_DEVICE;
     dev->flags = 0;
     dev->uid = dev->gid = 0;
-    dev->mode = 0200;
+    dev->mode = 0222;
     dev->atime = dev->ctime = dev->mtime = clock_boot();
     strncpy(dev->name, devname, sizeof(dev->name));
     return dev;

kernel/src/sys/mem.cpp

@@ -32,12 +32,8 @@ static int mman_flags_from_prot(int prot)
     prot &= 0b111;
     int flags = MAP_USER | MAP_AS_OWNED_BY_TASK;
     if (prot == PROT_NONE) return MAP_AS_OWNED_BY_TASK;
-    if ((prot & PROT_WRITE) > 0) {
-        flags |= MAP_READ_WRITE;
-    }
-    if ((prot & PROT_EXEC) > 0) {
-        flags |= MAP_EXEC;
-    }
+    if ((prot & PROT_WRITE) > 0) { flags |= MAP_READ_WRITE; }
+    if ((prot & PROT_EXEC) > 0) { flags |= MAP_EXEC; }
     return flags;
 }
 
@@ -72,11 +68,11 @@ void sys_mmap(Context* context, void* address, size_t size, int prot, int fd, of
             return;
         }
         uint64_t addr_offset = (uint64_t)address % PAGE_SIZE;
-        if(fd >= 0)
+        if (fd >= 0)
         {
             int err;
-            Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
-            if(!file)
+            Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
+            if (!file)
             {
                 context->rax = MAP_FAIL(err);
                 return;
@@ -99,7 +95,8 @@ void sys_mmap(Context* context, void* address, size_t size, int prot, int fd, of
             return;
         }
     }
-    kdbgln("mmap(): %ld pages at any address, %s, fd %d", Utilities::get_blocks_from_size(PAGE_SIZE, size), format_prot(prot), fd);
+    kdbgln("mmap(): %ld pages at any address, %s, fd %d", Utilities::get_blocks_from_size(PAGE_SIZE, size),
+           format_prot(prot), fd);
     uint64_t ptr =
         Scheduler::current_task()->allocator.request_virtual_pages(Utilities::get_blocks_from_size(PAGE_SIZE, size));
     if (!ptr)
@@ -108,11 +105,11 @@ void sys_mmap(Context* context, void* address, size_t size, int prot, int fd, of
         context->rax = MAP_FAIL(ENOMEM);
         return;
     }
-    if(fd >= 0)
+    if (fd >= 0)
     {
         int err;
-        Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
-        if(!file)
+        Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
+        if (!file)
         {
             context->rax = MAP_FAIL(err);
             return;
@@ -172,10 +169,12 @@ void sys_munmap(Context* context, void* address, size_t size)
     uint64_t offset = (uint64_t)address % PAGE_SIZE;
     Scheduler::current_task()->allocator.free_virtual_pages(((uint64_t)address - offset),
                                                             Utilities::get_blocks_from_size(PAGE_SIZE, size));
-    if(flags & MAP_AS_OWNED_BY_TASK)
-        MemoryManager::release_pages((void*)((uint64_t)address - offset), Utilities::get_blocks_from_size(PAGE_SIZE, size));
+    if (flags & MAP_AS_OWNED_BY_TASK)
+        MemoryManager::release_pages((void*)((uint64_t)address - offset),
+                                     Utilities::get_blocks_from_size(PAGE_SIZE, size));
     else
-        MemoryManager::release_unaligned_mappings((void*)((uint64_t)address - offset), Utilities::get_blocks_from_size(PAGE_SIZE, size));
+        MemoryManager::release_unaligned_mappings((void*)((uint64_t)address - offset),
+                                                  Utilities::get_blocks_from_size(PAGE_SIZE, size));
     kdbgln("munmap() succeeded");
     context->rax = 0;
     return;
@@ -219,7 +218,8 @@ void sys_mprotect(Context* context, void* address, size_t size, int prot)
 
     uint64_t offset = (uint64_t)address % PAGE_SIZE;
     MemoryManager::protect((void*)((uint64_t)address - offset), Utilities::get_blocks_from_size(PAGE_SIZE, size),
-                           flags & MAP_AS_OWNED_BY_TASK ? mman_flags_from_prot(prot) : mman_flags_from_prot(prot) & ~(MAP_AS_OWNED_BY_TASK));
+                           flags & MAP_AS_OWNED_BY_TASK ? mman_flags_from_prot(prot)
+                                                        : mman_flags_from_prot(prot) & ~(MAP_AS_OWNED_BY_TASK));
     kdbgln("mprotect() succeeded");
     context->rax = 0;
     return;

kernel/src/sys/stdio.cpp

@@ -38,7 +38,7 @@ void sys_fcntl(Context* context, int fd, int command, uintptr_t arg)
 {
     Task* current_task = Scheduler::current_task();
     int err;
-    Descriptor* file = current_task->descriptor_from_fd(fd, err);
+    Descriptor* file = current_task->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;
@@ -102,7 +102,7 @@ void sys_seek(Context* context, int fd, long offset, int whence)
         return;
     }
     int err;
-    Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;
@@ -144,7 +144,7 @@ void sys_write(Context* context, int fd, size_t size, const char* addr)
         return;
     }
     int err;
-    Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;
@@ -155,7 +155,8 @@ void sys_write(Context* context, int fd, size_t size, const char* addr)
         context->rax = -EBADF;
         return;
     }
-    ssize_t result = file->write(size, (const char*)VMM::get_physical((uint64_t)addr));
+    ssize_t result = file->write(
+        size, (const char*)VMM::get_physical((uint64_t)addr)); // FIXME: Handle big buffers and invalid addresses.
     context->rax = (size_t)result;
     return;
 }
@@ -274,13 +275,13 @@ void sys_read(Context* context, int fd, size_t size, char* buffer)
         return;
     }
     int err;
-    Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;
         return;
     }
-    if (!file->is_open() || !file->can_read())
+    if (!file->can_read())
     {
         context->rax = -EBADF;
         return;
@@ -310,7 +311,7 @@ void sys_read(Context* context, int fd, size_t size, char* buffer)
 void sys_close(Context* context, int fd)
 {
     int err;
-    Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;
@@ -352,13 +353,13 @@ void sys_access(Context* context, const char* path, int) // FIXME: Use the amode
 void sys_dup2(Context* context, int fd, int fd2)
 {
     int err;
-    Descriptor* file1 = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file1 = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file1)
     {
         context->rax = -err;
         return;
     }
-    Descriptor* file2 = Scheduler::current_task()->descriptor_from_fd(fd2, err); // FIXME: This will return EBADF if fd2 is not open, but we want to replace it with fd1 if it is not open.
+    Descriptor* file2 = Scheduler::current_task()->descriptor_from_fd(fd2, err);
     if (!file2)
     {
         context->rax = -err;
@@ -380,7 +381,7 @@ void sys_umask(Context* context, mode_t cmask)
 void sys_ioctl(Context* context, int fd, int cmd, uintptr_t arg)
 {
     int err;
-    Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
+    Descriptor* file = Scheduler::current_task()->open_descriptor_from_fd(fd, err);
     if (!file)
     {
         context->rax = -err;

kernel/src/thread/Task.cpp

@@ -112,14 +112,21 @@ bool Task::is_still_blocking()
     }
 }
 
-Descriptor* Task::descriptor_from_fd(int fd, int& error)
+Descriptor* Task::open_descriptor_from_fd(int fd, int& error)
 {
-    if (fd < 0 || fd >= TASK_MAX_FDS)
+    Descriptor* file = descriptor_from_fd(fd, error);
+    if (!file) return nullptr;
+    if (!file->is_open())
     {
         error = EBADF;
         return nullptr;
     }
-    if (!files[fd].is_open())
+    return file;
+}
+
+Descriptor* Task::descriptor_from_fd(int fd, int& error)
+{
+    if (fd < 0 || fd >= TASK_MAX_FDS)
     {
         error = EBADF;
         return nullptr;

libs/libc/include/stdio.h

@@ -163,7 +163,8 @@ extern "C"
      * of the last error encountered during a call to a system or library function. */
     void perror(const char* str);
 
-    int remove(const char* pathname); // Not implemented.
+    int remove(const char* pathname);                     // Not implemented.
+    int rename(const char* oldpath, const char* newpath); // Not implemented.
 
     FILE* tmpfile(void); // Not implemented.
 

libs/libc/src/printf.cpp

@@ -185,6 +185,7 @@ static int internal_printf(const char* format, PutString put_string_callback, ss
                     preserve_format = true;
                     break;
                 }
+                case 'i':
                 case 'd': {
                     char result[32];
                     if (is_unsigned_long)

libs/libc/src/stdio.cpp

@@ -64,6 +64,11 @@ extern "C"
         NOT_IMPLEMENTED("fscanf");
     }
 
+    int rename(const char*, const char*)
+    {
+        NOT_IMPLEMENTED("rename");
+    }
+
     FILE* tmpfile()
     {
         errno = ENOTSUP;

ports/nasm/package.sh

@@ -37,6 +37,5 @@ port_install()
 
 port_uninstall() # nasm's Makefile does not provide an uninstall target.
 {
-    rm -f $DESTDIR/bin/nasm
-    rm -f $DESTDIR/bin/ndisasm
+    rm -f $DESTDIR/bin/{nasm,ndisasm}
 }