kgzip is a kzip(8) replacement able to compress and link bootable

32-bit binaries in both ELF and a.out format.

Development sponsored by Global Technology Associates, Inc.

Reviewed/tested by: abial

1 files changed, 122 insertions, 0 deletions

diff --git a/usr.sbin/kgzip/xio.c b/usr.sbin/kgzip/xio.c
new file mode 100644
index 0000000..ed04f66
--- /dev/null
+++ b/usr.sbin/kgzip/xio.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 1999 Global Technology Associates, Inc.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``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 OR CONTRIBUTORS
+ * 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.
+ *
+ *	$Id:$
+ */
+
+#include <err.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "kgzip.h"
+
+/*
+ * Close a file.
+ */
+void
+xclose(const struct iodesc *id)
+{
+    if (close(id->fd))
+	err(1, "%s", id->fname);
+}
+
+/*
+ * Copy bytes from one file to another.
+ */
+void
+xcopy(const struct iodesc * idi, const struct iodesc * ido,
+      size_t nbyte, off_t offset)
+{
+    char buf[8192];
+    size_t n;
+
+    while (nbyte) {
+	if ((n = sizeof(buf)) > nbyte)
+	    n = nbyte;
+	if (xread(idi, buf, n, offset) != n)
+	    errx(1, "%s: Short read", idi->fname);
+	xwrite(ido, buf, n);
+	nbyte -= n;
+	offset = -1;
+    }
+}
+
+/*
+ * Write binary zeroes to a file.
+ */
+void
+xzero(const struct iodesc * id, size_t nbyte)
+{
+    char buf[8192];
+    size_t n;
+
+    memset(buf, 0, sizeof(buf));
+    while (nbyte) {
+	if ((n = sizeof(buf)) > nbyte)
+	    n = nbyte;
+	xwrite(id, buf, n);
+	nbyte -= n;
+    }
+}
+
+/*
+ * Read from a file.
+ */
+size_t
+xread(const struct iodesc * id, void *buf, size_t nbyte, off_t offset)
+{
+    ssize_t n;
+
+    if (offset != -1 && lseek(id->fd, offset, SEEK_SET) != offset)
+	err(1, "%s", id->fname);
+    if ((n = read(id->fd, buf, nbyte)) == -1)
+	err(1, "%s", id->fname);
+    return (size_t)n;
+}
+
+/*
+ * Write to a file.
+ */
+void
+xwrite(const struct iodesc * id, const void *buf, size_t nbyte)
+{
+    ssize_t n;
+
+    if ((n = write(id->fd, buf, nbyte)) == -1)
+	err(1, "%s", id->fname);
+    if ((size_t)n != nbyte)
+	errx(1, "%s: Short write", id->fname);
+}
+
+/*
+ * Reposition within a file.
+ */
+void
+xseek(const struct iodesc *id, off_t offset)
+{
+    if (lseek(id->fd, offset, SEEK_SET) != offset)
+	err(1, "%s", id->fname);
+}