kernel: Implement lseek()

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 7 insertions, 1 deletions

diff --git a/sys/include/sys/filedesc.h b/sys/include/sys/filedesc.h
index 70b297d..83c32ee 100644
--- a/sys/include/sys/filedesc.h
+++ b/sys/include/sys/filedesc.h
@@ -39,6 +39,10 @@
 #define O_WRONLY 0x00001
 #define O_RDWR   0x00002
 
+#define SEEK_SET    0
+#define SEEK_CUR    1
+#define SEEK_END    2
+
 struct proc;
 
 struct filedesc {
@@ -56,11 +60,12 @@ void fd_close_fdnum(struct proc *td, int fdno);
 ssize_t write(int fd, const void *buf, size_t count);
 int open(const char *pathname, int oflag);
 int read(int fd, void *buf, size_t count);
+off_t lseek(int fd, off_t offset, int whence);
 
 uint64_t sys_write(struct syscall_args *args);
 uint64_t sys_open(struct syscall_args *args);
 uint64_t sys_close(struct syscall_args *args);
 uint64_t sys_read(struct syscall_args *args);
+uint64_t sys_lseek(struct syscall_args *args);
 #endif
-
 #endif
diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index ae2438f..8ebc2da 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -42,6 +42,7 @@ enum {
     SYS_open,
     SYS_close,
     SYS_read,
+    SYS_lseek,
     __MAX_SYSCALLS
 };