kernel: syscall: Add SYS_lseek

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

4 files changed, 17 insertions, 0 deletions

diff --git a/sys/include/sys/filedesc.h b/sys/include/sys/filedesc.h
index 5f7e4e3..4ce2db2 100644
--- a/sys/include/sys/filedesc.h
+++ b/sys/include/sys/filedesc.h
@@ -62,5 +62,7 @@ off_t fd_seek(int fildes, off_t offset, int whence);
 int fd_dup(int fd);
 struct filedesc *fd_get(unsigned int fdno);
 
+scret_t sys_lseek(struct syscall_args *scargs);
+
 #endif  /* _KERNEL */
 #endif  /* !_SYS_FILEDESC_H_ */
diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index 0376bd2..37e2286 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -51,6 +51,7 @@
 #define SYS_mmap    10
 #define SYS_munmap  11
 #define SYS_access  12
+#define SYS_lseek   13
 
 #if defined(_KERNEL)
 /* Syscall return value and arg type */
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
index 1737b53..a2dd667 100644
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -331,3 +331,16 @@ fd_seek(int fildes, off_t offset, int whence)
 
     return 0;
 }
+
+/*
+ * Update file offset
+ *
+ * arg0: `filedes'
+ * arg1: `offset'
+ * arg2: `whence'
+ */
+scret_t
+sys_lseek(struct syscall_args *scargs)
+{
+    return fd_seek(scargs->arg0, scargs->arg1, scargs->arg2);
+}
diff --git a/sys/kern/kern_syscall.c b/sys/kern/kern_syscall.c
index fdcc73f..aaa5d04 100644
--- a/sys/kern/kern_syscall.c
+++ b/sys/kern/kern_syscall.c
@@ -49,6 +49,7 @@ scret_t(*g_sctab[])(struct syscall_args *) = {
     sys_mmap,   /* SYS_mmap */
     sys_munmap, /* SYS_munap */
     sys_access, /* SYS_access */
+    sys_lseek,  /* SYS_lseek */
 };
 
 const size_t MAX_SYSCALLS = NELEM(g_sctab);