kernel/src/sys/file.cpp

@@ -3,9 +3,6 @@
 #include "memory/MemoryManager.h"
 #include "sys/Syscall.h"
 #include "thread/Scheduler.h"
-#include <bits/seek.h>
-#include <luna/SafeArithmetic.h>
-#include <sys/types.h>
 
 Result<u64> sys_read(Registers*, SyscallArgs args)
 {
@@ -29,57 +26,3 @@ Result<u64> sys_read(Registers*, SyscallArgs args)
 
     return nread;
 }
-
-Result<u64> sys_write(Registers*, SyscallArgs args)
-{
-    int fd = (int)args[0];
-    const u8* buf = (const u8*)args[1];
-    usize size = (usize)args[2];
-
-    if (!MemoryManager::validate_user_read(buf, size)) return err(EFAULT);
-
-    if (fd < 0 || fd >= FD_MAX) return err(EBADF);
-
-    Thread* current = Scheduler::current();
-
-    Option<FileDescriptor>& descriptor = current->fd_table->fds[fd];
-
-    if (!descriptor.has_value()) return err(EBADF);
-
-    usize nwritten = TRY(descriptor->inode->write(buf, descriptor->offset, size));
-
-    descriptor->offset += nwritten;
-
-    return nwritten;
-}
-
-Result<u64> sys_lseek(Registers*, SyscallArgs args)
-{
-    int fd = (int)args[0];
-    off_t offset = (long)args[1];
-    int whence = (int)args[2];
-
-    if (fd < 0 || fd >= FD_MAX) return err(EBADF);
-
-    Thread* current = Scheduler::current();
-
-    Option<FileDescriptor>& descriptor = current->fd_table->fds[fd];
-
-    if (!descriptor.has_value()) return err(EBADF);
-
-    off_t new_offset;
-
-    switch (whence)
-    {
-    case SEEK_SET: new_offset = offset; break;
-    case SEEK_CUR: new_offset = TRY(safe_add((long)descriptor->offset, offset)); break;
-    case SEEK_END: todo();
-    default: return err(EINVAL);
-    }
-
-    if (new_offset < 0) return err(EINVAL);
-
-    descriptor->offset = (usize)new_offset;
-
-    return (u64)new_offset;
-}

libc/include/bits/seek.h

@@ -1,10 +0,0 @@
-/* bits/seek.h: SEEK_* constants for lseek() and fseek(). */
-
-#ifndef _BITS_SEEK_H
-#define _BITS_SEEK_H
-
-#define SEEK_SET 0
-#define SEEK_CUR 1
-#define SEEK_END 2
-
-#endif

libc/include/stdio.h

@@ -3,7 +3,6 @@
 #ifndef _STDIO_H
 #define _STDIO_H
 
-#include <bits/seek.h>
 #include <stdarg.h>
 #include <sys/types.h>
 
@@ -14,6 +13,7 @@ typedef struct
     int _eof;
 } FILE;
 
+#define SEEK_SET 0
 #define EOF -1
 
 extern FILE* stderr;
@@ -35,23 +35,10 @@ extern "C"
     /* Read arbitrarily sized items from a stream. */
     size_t fread(void* buf, size_t size, size_t nmemb, FILE* stream);
 
-    /* Write arbitrarily sized items to a stream. */
+    size_t fwrite(const void*, size_t, size_t, FILE*);
-    size_t fwrite(const void* buf, size_t size, size_t nmemb, FILE* stream);
 
-    /* Move the file position. Clears the end-of-file indicator on success. */
+    int fseek(FILE*, long, int);
-    int fseek(FILE* stream, long offset, int whence);
+    long ftell(FILE*);
-
-    /* Return the current file position. */
-    long ftell(FILE* stream);
-
-    /* Rewind the file position and clear the error and end-of-file indicators. */
-    void rewind(FILE* stream);
-
-    /* Save the current file position. */
-    int fgetpos(FILE* stream, fpos_t* pos);
-
-    /* Restore a file position. */
-    int fsetpos(FILE* stream, const fpos_t* pos);
 
     /* Return whether the error indicator was set in stream. */
     int ferror(FILE* stream);

libc/include/sys/types.h

@@ -13,8 +13,5 @@ typedef __i64_t ssize_t;
 typedef __i64_t time_t;
 typedef __u16_t mode_t;
 typedef __u64_t useconds_t;
-typedef __i64_t off_t;
-
-typedef off_t fpos_t;
 
 #endif

libc/include/unistd.h

@@ -6,7 +6,6 @@
 #define __need_NULL
 #include <stddef.h>
 
-#include <bits/seek.h>
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -39,12 +38,6 @@ extern "C"
     /* Read bytes from a file descriptor. */
     ssize_t read(int fd, void* buf, size_t size);
 
-    /* Write bytes to a file descriptor. */
-    ssize_t write(int fd, const void* buf, size_t size);
-
-    /* Modify a file descriptor's offset. */
-    off_t lseek(int fd, off_t offset, int whence);
-
 #ifdef __cplusplus
 }
 #endif

libc/src/stdio.cpp

@@ -66,53 +66,6 @@ extern "C"
             return (size_t)nread / size;
     }
 
-    size_t fwrite(const void* buf, size_t size, size_t nmemb, FILE* stream)
-    {
-        if (size * nmemb == 0) return 0;
-
-        ssize_t nwrite = write(stream->_fd, buf, size * nmemb);
-
-        return (size_t)nwrite / size;
-    }
-
-    int fseek(FILE* stream, long offset, int whence)
-    {
-        long result = lseek(stream->_fd, offset, whence);
-        if (result < 0) return -1;
-
-        // man fseek(3): A successful call to the fseek() function clears the end-of-file indicator for the stream.
-        stream->_eof = 0;
-
-        return 0;
-    }
-
-    long ftell(FILE* stream)
-    {
-        return lseek(stream->_fd, 0, SEEK_CUR);
-    }
-
-    void rewind(FILE* stream)
-    {
-        lseek(stream->_fd, 0, SEEK_SET);
-
-        clearerr(stream);
-    }
-
-    int fgetpos(FILE* stream, fpos_t* pos)
-    {
-        long offset = ftell(stream);
-        if (offset < 0) return -1;
-
-        *pos = offset;
-
-        return 0;
-    }
-
-    int fsetpos(FILE* stream, const fpos_t* pos)
-    {
-        return fseek(stream, *pos, SEEK_SET);
-    }
-
     int ferror(FILE* stream)
     {
         return stream->_err;

libc/src/unistd.cpp

@@ -54,16 +54,4 @@ extern "C"
         long rc = syscall(SYS_read, fd, buf, size);
         __errno_return(rc, ssize_t);
     }
-
-    ssize_t write(int fd, const void* buf, size_t size)
-    {
-        long rc = syscall(SYS_write, fd, buf, size);
-        __errno_return(rc, ssize_t);
-    }
-
-    off_t lseek(int fd, off_t offset, int whence)
-    {
-        long rc = syscall(SYS_lseek, fd, offset, whence);
-        __errno_return(rc, off_t);
-    }
 }

libluna/include/luna/Syscall.h

@@ -2,7 +2,7 @@
 
 #define enumerate_syscalls(_e)                                                                                         \
     _e(exit) _e(console_write) _e(clock_gettime) _e(allocate_memory) _e(deallocate_memory) _e(usleep) _e(open)         \
-        _e(close) _e(read) _e(getpid) _e(write) _e(lseek)
+        _e(close) _e(read) _e(getpid)
 
 enum Syscalls
 {