add directory kernel

kernel/0.95/linux-0.95/fs/stat.c

@@ -0,0 +1,83 @@
+/*
+ *  linux/fs/stat.c
+ *
+ *  (C) 1991  Linus Torvalds
+ */
+
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <asm/segment.h>
+
+static void cp_stat(struct inode * inode, struct stat * statbuf)
+{
+	struct stat tmp;
+	int i;
+
+	verify_area(statbuf,sizeof (struct stat));
+	tmp.st_dev = inode->i_dev;
+	tmp.st_ino = inode->i_ino;
+	tmp.st_mode = inode->i_mode;
+	tmp.st_nlink = inode->i_nlink;
+	tmp.st_uid = inode->i_uid;
+	tmp.st_gid = inode->i_gid;
+	tmp.st_rdev = inode->i_rdev;
+	tmp.st_size = inode->i_size;
+	tmp.st_atime = inode->i_atime;
+	tmp.st_mtime = inode->i_mtime;
+	tmp.st_ctime = inode->i_ctime;
+	for (i=0 ; i<sizeof (tmp) ; i++)
+		put_fs_byte(((char *) &tmp)[i],i + (char *) statbuf);
+}
+
+int sys_stat(char * filename, struct stat * statbuf)
+{
+	struct inode * inode;
+
+	if (!(inode=namei(filename)))
+		return -ENOENT;
+	cp_stat(inode,statbuf);
+	iput(inode);
+	return 0;
+}
+
+int sys_lstat(char * filename, struct stat * statbuf)
+{
+	struct inode * inode;
+
+	if (!(inode = lnamei(filename)))
+		return -ENOENT;
+	cp_stat(inode,statbuf);
+	iput(inode);
+	return 0;
+}
+
+int sys_fstat(unsigned int fd, struct stat * statbuf)
+{
+	struct file * f;
+	struct inode * inode;
+
+	if (fd >= NR_OPEN || !(f=current->filp[fd]) || !(inode=f->f_inode))
+		return -EBADF;
+	cp_stat(inode,statbuf);
+	return 0;
+}
+
+int sys_readlink(const char * path, char * buf, int bufsiz)
+{
+	struct inode * inode;
+
+	if (bufsiz <= 0)
+		return -EINVAL;
+	verify_area(buf,bufsiz);
+	if (!(inode = lnamei(path)))
+		return -ENOENT;
+	if (!inode->i_op || !inode->i_op->readlink) {
+		iput(inode);
+		return -EINVAL;
+	}
+	return inode->i_op->readlink(inode,buf,bufsiz);
+}