1 files changed, 124 insertions, 0 deletions
diff --git a/usr.sbin/fifolog/lib/fifolog_create.c b/usr.sbin/fifolog/lib/fifolog_create.c
new file mode 100644
index 000000000000..5737cba15db6
--- /dev/null
+++ b/usr.sbin/fifolog/lib/fifolog_create.c
@@ -0,0 +1,124 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2005-2008 Poul-Henning Kamp
+ * 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.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/endian.h>
+#include <sys/stat.h>
+#include <sys/disk.h>
+
+#include "fifolog.h"
+#include "libfifolog.h"
+
+const char *
+fifolog_create(const char *fn, off_t size, ssize_t recsize)
+{
+	int i, fd;
+	ssize_t u;
+	u_int uu;
+	off_t ms;
+	struct stat st;
+	char *buf;
+	int created;
+
+	fd = open(fn, O_WRONLY | O_TRUNC | O_EXCL | O_CREAT, 0644);
+	if (fd < 0) {
+		created = 0;
+		fd = open(fn, O_WRONLY);
+		if (fd < 0)
+			return ("Could not open");
+	} else
+		created = 1;
+
+	/* Default sectorsize is 512 */
+	if (recsize == 0)
+		recsize = 512;
+
+	/* See what we got... */
+	i = fstat(fd, &st);
+	assert(i == 0);
+	if (!S_ISBLK(st.st_mode) &&
+	    !S_ISCHR(st.st_mode) &&
+	    !S_ISREG(st.st_mode)) {
+		assert(!close (fd));
+		return ("Wrong file type");
+	}
+
+	if(!created && S_ISREG(st.st_mode)) {
+		assert(!close (fd));
+		return ("Wrong file type");
+	}
+
+	/* For raw disk with larger sectors: use 1 sector */
+	i = ioctl(fd, DIOCGSECTORSIZE, &uu);
+	u = uu;
+	if (i == 0 && (u > recsize || (recsize % u) != 0))
+		recsize = u;
+
+	/* If no configured size, or too large for disk, use device size */
+	i = ioctl(fd, DIOCGMEDIASIZE, &ms);
+	if (i == 0 && (size == 0 || size > ms))
+		size = ms;
+
+	if (size == 0 && S_ISREG(st.st_mode))
+		size = st.st_size;
+
+	if (size == 0)
+		size = recsize * (off_t)(24*60*60);
+
+	if (S_ISREG(st.st_mode) && ftruncate(fd, size) < 0)
+		return ("Could not ftrunc");
+
+	buf = calloc(1, recsize);
+	if (buf == NULL)
+		return ("Could not malloc");
+
+	strcpy(buf, FIFOLOG_FMT_MAGIC);		/*lint !e64 */
+	be32enc(buf + FIFOLOG_OFF_BS, recsize);
+	if (recsize != pwrite(fd, buf, recsize, 0)) {
+		i = errno;
+		free(buf);
+		errno = i;
+		return ("Could not write first sector");
+	}
+	memset(buf, 0, recsize);
+	if ((int)recsize != pwrite(fd, buf, recsize, recsize)) {
+		i = errno;
+		free(buf);
+		errno = i;
+		return ("Could not write second sector");
+	}
+	free(buf);
+	assert(0 == close(fd));
+	return (NULL);
+}