syscalls: fchmodat

src/fs/devfs.c

@@ -77,8 +77,14 @@ static int devfs_getdirent(dirnode_t* node, dent_t* buff, size_t count, uintmax_
         return 0;
 }
 
+static int devfs_chmod(vnode_t* node, mode_t mode){
+	node->st.st_mode &= ~07777;
+	node->st.st_mode |= mode & 07777;
+	return 0;
+}
+
 static fscalls_t devfscalls = {
-	devfs_mount, devfs_unmount, devfs_open, devfs_close, devfs_mkdir, devfs_create, devfs_write, devfs_read, devfs_getdirent
+	devfs_mount, devfs_unmount, devfs_open, devfs_close, devfs_mkdir, devfs_create, devfs_write, devfs_read, devfs_getdirent, devfs_chmod
 };
 
 void devfs_init(){

src/fs/tmpfs.c

@@ -155,8 +155,14 @@ static int tmpfs_getdirent(dirnode_t* node, dent_t* buff, size_t count, uintmax_
 	return 0;
 }
 
+static int tmpfs_chmod(vnode_t* node, mode_t mode){
+	node->st.st_mode &= ~07777;
+	node->st.st_mode |= mode & 07777;
+	return 0;
+}
+
 static fscalls_t funcs = {
-	tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create, tmpfs_write, tmpfs_read, tmpfs_getdirent
+	tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create, tmpfs_write, tmpfs_read, tmpfs_getdirent, tmpfs_chmod
 };
 
 

src/fs/vfs.c

@@ -100,6 +100,21 @@ int vfs_isatty(vnode_t* node){
 	
 }
 
+int vfs_chmod(vnode_t* node, mode_t mode){
+	
+	if(!node->fs->calls->chmod)
+		return ENOSYS;
+
+	spinlock_acquire(&lock);
+
+	int ret = node->fs->calls->chmod(node, mode);
+
+	spinlock_release(&lock);
+
+	return ret;
+
+}
+
 int vfs_poll(vnode_t* node, pollfd* fd){
 	
 	switch(GETTYPE(node->st.st_mode)){