LIF file system

1 files changed, 268 insertions, 0 deletions

diff --git a/sys/arch/hppa/stand/libsa/lif.c b/sys/arch/hppa/stand/libsa/lif.c
new file mode 100644
index 00000000000..ed4622450d7
--- /dev/null
+++ b/sys/arch/hppa/stand/libsa/lif.c
@@ -0,0 +1,268 @@
+/*	$OpenBSD: lif.c,v 1.1 1998/07/30 16:01:48 mickey Exp $	*/
+
+/*
+ * Copyright (c) 1998 Michael Shalayeff
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <lib/libsa/stand.h>
+
+#include <machine/lifvar.h>
+
+extern int debug;
+
+struct file {
+	char f_buf[LIF_FILESTART];/* buffer for lif volume header and dir */
+	struct lifvol *f_lp;	/* lif volume header pointer */
+	struct lifdir *f_ld;	/* lif dir pointer */
+	int	f_nfiles;	/* gross number for lif dir entries */
+
+	off_t	f_seek;		/* seek pointer for file read */
+	struct lifdir *f_rd;	/* lif dir pointer for readdir */
+
+	int	f_isdir;	/* special hacky flag for '.' dir */
+	int	f_count;	/* this file length */
+	int	f_off;		/* this file offset */
+};
+
+int
+lif_open (path, f)
+	char *path;
+	struct open_file *f;
+{
+	register struct file *fp;
+	register struct lifdir *dp;
+	register char *p, *q;
+	struct load load;
+	int err, buf_size, l;
+
+#ifdef LIFDEBUG
+	if (debug)
+		printf("lif_open(%s, %p)\n", path, f);
+#endif
+
+	fp = alloc(sizeof(*fp));
+	if ((err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ, 0,
+	    sizeof(fp->f_buf), &fp->f_buf, &buf_size)) ||
+	    buf_size != sizeof(fp->f_buf)) {
+#ifdef LIFDEBUG
+		if (debug)
+			printf("lif_open: unable to read LIF header (%d)\n", err);
+#endif
+	} else if ((fp->f_lp = (struct lifvol *)fp->f_buf)->vol_id == VOL_ID) {
+		f->f_fsdata = fp;
+		fp->f_ld = (struct lifdir *)(fp->f_buf + LIF_DIRSTART);
+		fp->f_seek = 0;
+		fp->f_rd = fp->f_ld;
+		fp->f_nfiles = lifstob(fp->f_lp->vol_dirsize) /
+			sizeof(struct lifdir);
+
+		/* no dirs on the lif */
+		for (p = path + (l = strlen(path)); p >= path; p--)
+			if (*p == '/') {
+				p++;
+				break;
+			}
+		if (p > path)
+			path = p;
+	} else
+		err = EINVAL;
+
+	if (!err && *path != '.') {
+		fp->f_isdir = 0;
+		err = ENOENT;
+		for (dp = fp->f_ld; dp < &fp->f_ld[fp->f_nfiles]; dp++) {
+			if (debug)
+#ifdef LIFDEBUG
+				printf("lif_open: "
+				       "%s <--> '%c%c%c%c%c%c%c%c%c%c'\n",
+				       path, dp->dir_name[0], dp->dir_name[1], 
+				       dp->dir_name[2], dp->dir_name[3], 
+				       dp->dir_name[4], dp->dir_name[5], 
+				       dp->dir_name[6], dp->dir_name[7], 
+				       dp->dir_name[8], dp->dir_name[9]);
+#endif
+			for (p = path, q = dp->dir_name;
+			     *q && *q != ' '; q++, p++)
+				if (tolower(*q) != tolower(*p))
+					break;
+			if ((!*q || *q == ' ') && !*p) {
+				err = 0;
+				break;
+			}
+		}
+		if (!err) {
+			fp->f_off = lifstodb(dp->dir_addr);
+			if (!(err =(f->f_dev->dv_strategy)(f->f_devdata, F_READ,
+			      fp->f_off, sizeof(load), &load, &buf_size)) &&
+			    buf_size == sizeof(load)) {
+				/* no checksum */
+				fp->f_count = load.count - sizeof(int);
+				fp->f_off = dbtob(fp->f_off) + sizeof(load);
+#ifdef LIFDEBUG
+				if (debug)
+					printf("lif_open: %u @ %u [%x]\n",
+					       fp->f_count, fp->f_off,
+					       load.address);
+#endif
+			} else if (!err)
+				err = EIO;
+		}
+	} else
+		fp->f_isdir = 1;
+
+	if (err) {
+		free (fp, sizeof(*fp));
+		f->f_fsdata = NULL;
+	}
+	return err;
+}
+
+int
+lif_close(f)
+	struct open_file *f;
+{
+	free (f->f_fsdata, sizeof(struct file));
+	f->f_fsdata = NULL;
+	return 0;
+}
+
+int
+lif_read(f, buf, size, resid)
+	struct open_file *f;
+	void *buf;
+	size_t size;
+	size_t *resid;
+{
+	register struct file *fp = (struct file *)f->f_fsdata;
+	register char *p;
+	char bbuf[DEV_BSIZE];
+	size_t bsize, count = sizeof(bbuf);
+	int err = 0;
+	int foff;
+
+#ifdef LIFDEBUG
+	if (debug)
+		printf("lif_read(%p, %p, %u, %p)\n", f, buf, size, resid);
+#endif
+
+	for (p = bbuf; size; fp->f_seek += bsize, p += bsize) {
+		foff = fp->f_off + fp->f_seek;
+		if (fp->f_seek >= fp->f_count ||
+		    (err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ,
+		     btodb(foff), count, p, &bsize)))
+			break;
+		if (p == bbuf) {
+			bsize = sizeof(bbuf) - (foff & (sizeof(bbuf) - 1));
+			bsize = min(bsize, size);
+			bcopy(bbuf + (foff & (sizeof(bbuf) - 1)), buf, bsize);
+			p = buf;
+		}
+		count = size -= bsize;
+	}
+	if (resid)
+		*resid = size;
+
+	return err;
+}
+
+int
+lif_write(f, buf, size, resid)
+	struct open_file *f;
+	void *buf;
+	size_t size;
+	size_t *resid;
+{
+	return EOPNOTSUPP;
+}
+
+off_t
+lif_seek(f, offset, where)
+	struct open_file *f;
+	off_t offset;
+	int where;
+{
+	register struct file *fp = (struct file *)f->f_fsdata;
+
+	switch (where) {
+	case SEEK_SET:
+		fp->f_seek = offset;
+		break;
+	case SEEK_CUR:
+		fp->f_seek += offset;
+		break;
+	case SEEK_END:
+		fp->f_seek = fp->f_count - offset;
+		break;
+	default:
+		return (-1);
+	}
+	return (fp->f_seek);
+}
+
+int
+lif_stat(f, sb)
+	struct open_file *f;
+	struct stat *sb;
+{
+	register struct file *fp = (struct file *)f->f_fsdata;
+
+	sb->st_mode = 0755 | (fp->f_isdir? S_IFDIR: 0);	/* XXX */
+	sb->st_uid = 0;
+	sb->st_gid = 0;
+	sb->st_size = fp->f_count;
+	return 0;
+}
+
+int
+lif_readdir(f, name)
+	struct open_file *f;
+	char *name;
+{
+	register struct file *fp = (struct file *)f->f_fsdata;
+	register char *p;
+
+	if (name) {
+		while ((fp->f_rd->dir_name[0] == ' ' ||
+			!fp->f_rd->dir_name[0]) &&
+		       (fp->f_rd - fp->f_ld) < fp->f_nfiles)
+			fp->f_rd++;
+		if ((fp->f_rd - fp->f_ld) >= fp->f_nfiles) {
+			*name = '\0';
+			return -1;
+		}
+		strncpy(name, fp->f_rd->dir_name, sizeof(fp->f_rd->dir_name));
+		if ((p = strchr(name, ' ')))
+			*p = '\0';
+		fp->f_rd++;
+	} else
+		fp->f_rd = fp->f_ld;
+
+	return 0;
+}