import more libs to prep for new e2fsprogs

1 files changed, 207 insertions, 0 deletions

diff --git a/e2fsprogs/util.c b/e2fsprogs/util.c
new file mode 100644
index 0000000..d4d77b6
--- /dev/null
+++ b/e2fsprogs/util.c
@@ -0,0 +1,207 @@
+/*
+ * util.c --- helper functions used by tune2fs and mke2fs
+ * 
+ * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/major.h>
+#include <sys/stat.h>
+
+#include "e2fsbb.h"
+#include "e2p/e2p.h"
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "blkid/blkid.h"
+#include "util.h"
+
+void proceed_question(void)
+{
+	fputs("Proceed anyway? (y,n) ", stdout);
+	if (bb_ask_confirmation() == 0)
+		exit(1);
+}
+
+void check_plausibility(const char *device)
+{
+	int val;
+#ifdef CONFIG_LFS
+	struct stat64 s;
+	val = stat64(device, &s);
+#else
+	struct stat s;
+	val = stat(device, &s);
+#endif
+
+	if(val == -1)
+		bb_perror_msg_and_die("Could not stat %s", device);
+	if (!S_ISBLK(s.st_mode)) {
+		printf("%s is not a block special device.\n", device);
+		proceed_question();
+		return;
+	}
+
+#ifdef HAVE_LINUX_MAJOR_H
+#ifndef MAJOR
+#define MAJOR(dev)	((dev)>>8)
+#define MINOR(dev)	((dev) & 0xff)
+#endif
+#ifndef SCSI_BLK_MAJOR
+#ifdef SCSI_DISK0_MAJOR
+#ifdef SCSI_DISK8_MAJOR
+#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
+  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
+  ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
+#else
+#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
+  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
+#endif /* defined(SCSI_DISK8_MAJOR) */
+#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
+#else
+#define SCSI_BLK_MAJOR(M)  ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
+#endif /* defined(SCSI_DISK0_MAJOR) */
+#endif /* defined(SCSI_BLK_MAJOR) */
+	if (((MAJOR(s.st_rdev) == HD_MAJOR &&
+	      MINOR(s.st_rdev)%64 == 0) ||
+	     (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
+	      MINOR(s.st_rdev)%16 == 0))) {
+		printf("%s is entire device, not just one partition!\n", device);
+		proceed_question();
+	}
+#endif
+}
+
+void check_mount(const char *device, int force, const char *type)
+{
+	errcode_t retval;
+	int mount_flags;
+
+	retval = ext2fs_check_if_mounted(device, &mount_flags);
+	if (retval) {
+		bb_error_msg("Could not determine if %s is mounted", device);
+		return;
+	}
+	if (!(mount_flags & EXT2_MF_MOUNTED))
+		return;
+
+	bb_error_msg("%s is mounted !", device);
+	if (force)
+		bb_error_msg("forcing anyways and ignoring /etc/mtab status");
+	else
+		bb_error_msg_and_die("will not make a %s here!", type);
+}
+
+void parse_journal_opts(char **journal_device, int *journal_flags, 
+                        int *journal_size, const char *opts)
+{
+	char *buf, *token, *next, *p, *arg;
+	int journal_usage = 0;
+#if 0
+	int	len;
+	len = strlen(opts);
+	buf = xmalloc(len+1);
+	strcpy(buf, opts);
+#else
+	buf = bb_xstrdup(opts);
+#endif
+	for (token = buf; token && *token; token = next) {
+		p = strchr(token, ',');
+		next = 0;
+		if (p) {
+			*p = 0;
+			next = p+1;
+		} 
+		arg = strchr(token, '=');
+		if (arg) {
+			*arg = 0;
+			arg++;
+		}
+		if (strcmp(token, "device") == 0) {
+			*journal_device = blkid_get_devname(NULL, arg, NULL);
+			if (!journal_device) {
+				journal_usage++;
+				continue;
+			}
+		} else if (strcmp(token, "size") == 0) {
+			if (!arg) {
+				journal_usage++;
+				continue;
+			}
+			(*journal_size) = strtoul(arg, &p, 0);
+			if (*p)
+				journal_usage++;
+		} else if (strcmp(token, "v1_superblock") == 0) {
+			(*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
+			continue;
+		} else
+			journal_usage++;
+	}
+	if (journal_usage)
+		bb_error_msg_and_die(
+			"\nBad journal options specified.\n\n"
+			"Journal options are separated by commas, "
+			"and may take an argument which\n"
+			"\tis set off by an equals ('=') sign.\n\n"
+			"Valid journal options are:\n"
+			"\tsize=<journal size in megabytes>\n"
+			"\tdevice=<journal device>\n\n"
+			"The journal size must be between "
+			"1024 and 102400 filesystem blocks.\n\n");
+}	
+
+/*
+ * Determine the number of journal blocks to use, either via
+ * user-specified # of megabytes, or via some intelligently selected
+ * defaults.
+ * 
+ * Find a reasonable journal file size (in blocks) given the number of blocks
+ * in the filesystem.  For very small filesystems, it is not reasonable to
+ * have a journal that fills more than half of the filesystem.
+ */
+int figure_journal_size(int size, ext2_filsys fs)
+{
+	blk_t j_blocks;
+
+	if (fs->super->s_blocks_count < 2048) {
+		bb_error_msg("Filesystem too small for a journal");
+		return 0;
+	}
+
+	if (size >= 0) {
+		j_blocks = size * 1024 / (fs->blocksize	/ 1024);
+		if (j_blocks < 1024 || j_blocks > 102400)
+			bb_error_msg_and_die("\nThe requested journal "
+				"size is %d blocks;\n it must be "
+				"between 1024 and 102400 blocks; Aborting",
+				j_blocks);
+		if (j_blocks > fs->super->s_free_blocks_count)
+			bb_error_msg_and_die("Journal size too big for filesystem");
+		return j_blocks;
+	}
+
+	if (fs->super->s_blocks_count < 32768)
+		j_blocks = 1024;
+	else if (fs->super->s_blocks_count < 262144)
+		j_blocks = 4096;
+	else
+		j_blocks = 8192;
+
+	return j_blocks;
+}
+
+void print_check_message(ext2_filsys fs)
+{
+	printf("This filesystem will be automatically "
+		 "checked every %d mounts or\n"
+		 "%g days, whichever comes first.  "
+		 "Use tune2fs -c or -i to override.\n",
+	       fs->super->s_max_mnt_count,
+	       (double)fs->super->s_checkinterval / (3600 * 24));
+}