From 87d35aadd9d2874910b7b34e0724b0eef50df84f Mon Sep 17 00:00:00 2001
From: Juli Mallett <jmallett@FreeBSD.org>
Date: Sun, 19 Jan 2003 10:25:11 +0000
Subject: Add support to marshal a filesystem to a newfs(8) command that could
 be used to create it.  A small number of options are not marshalled as they
 are things it would be dumb to spit out, as they are used by internal
 computations, and newfs may change them, or they may not be directly
 apparent.

---
 sbin/dumpfs/dumpfs.c | 99 +++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 83 insertions(+), 16 deletions(-)

(limited to 'sbin/dumpfs/dumpfs.c')

diff --git a/sbin/dumpfs/dumpfs.c b/sbin/dumpfs/dumpfs.c
index af721ec43c57..0db6420d98b4 100644
--- a/sbin/dumpfs/dumpfs.c
+++ b/sbin/dumpfs/dumpfs.c
@@ -69,6 +69,7 @@ static const char rcsid[] =
 #include <fcntl.h>
 #include <fstab.h>
 #include <libufs.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -80,26 +81,47 @@ struct uufsd disk;
 
 int	dumpfs(const char *);
 int	dumpcg(void);
+int	marshal(const char *);
 void	pbits(void *, int);
+void	ufserr(const char *);
 void	usage(void) __dead2;
 
 int
 main(int argc, char *argv[])
 {
-	int eval;
+	const char *name;
+	int ch, domarshal, eval;
 
-	eval = 0;
+	domarshal = eval = 0;
 
-	while (getopt(argc, argv, "") != -1)
-		usage();
+	while ((ch = getopt(argc, argv, "m")) != -1) {
+		switch (ch) {
+		case 'm':
+			domarshal = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	}
 	argc -= optind;
 	argv += optind;
 
 	if (argc < 1)
 		usage();
 
-	while (*argv != NULL)
-		eval |= dumpfs(*argv++);
+	while ((name = *argv++) != NULL) {
+		if (ufs_disk_fillout(&disk, name) == -1) {
+			ufserr(name);
+			eval |= 1;
+			continue;
+		}
+		if (domarshal)
+			eval |= marshal(name);
+		else
+			eval |= dumpfs(name);
+		ufs_disk_close(&disk);
+	}
 	exit(eval);
 }
 
@@ -110,9 +132,6 @@ dumpfs(const char *name)
 	int64_t fssize;
 	int i;
 
-	if (ufs_disk_fillout(&disk, name) == -1)
-			goto err;
-
 	switch (disk.d_ufs) {
 	case 2:
 		fssize = afs.fs_size;
@@ -231,14 +250,9 @@ dumpfs(const char *name)
 		if (i == -1 || dumpcg())
 			goto err;
 	}
-	ufs_disk_close(&disk);
 	return (0);
 
-err:	if (disk.d_error != NULL)
-		warnx("%s: %s", name, disk.d_error);
-	else if (errno)
-		warn("%s", name);
-	ufs_disk_close(&disk);
+err:	ufserr(name);
 	return (1);
 }
 
@@ -302,6 +316,50 @@ dumpcg(void)
 	return (0);
 }
 
+int
+marshal(const char *name)
+{
+	struct fs *fs;
+
+	fs = &disk.d_fs;
+
+	printf("# newfs command for %s (%s)\n", name, disk.d_name);
+	printf("newfs ");
+	printf("-O %d ", disk.d_ufs);
+	if (fs->fs_flags & FS_DOSOFTDEP)
+		printf("-U ");
+	printf("-a %d ", fs->fs_maxcontig);
+	printf("-b %d ", fs->fs_bsize);
+	/* -c is dumb */
+	printf("-d %d ", fs->fs_maxbsize);
+	printf("-e %d ", fs->fs_maxbpg);
+	printf("-f %d ", fs->fs_fsize);
+	printf("-g %d ", fs->fs_avgfilesize);
+	printf("-h %d ", fs->fs_avgfpdir);
+	/* -i is dumb */
+	/* -j..l unimplemented */
+	printf("-m %d ", fs->fs_minfree);
+	/* -n unimplemented */
+	printf("-o ");
+	switch (fs->fs_optim) {
+	case FS_OPTSPACE:
+		printf("space ");
+		break;
+	case FS_OPTTIME:
+		printf("time ");
+		break;
+	default:
+		printf("unknown ");
+		break;
+	}
+	/* -p..r unimplemented */
+	printf("-s %jd ", (intmax_t)fs->fs_size);
+	printf("%s ", disk.d_name);
+	printf("\n");
+
+	return 0;
+}
+
 void
 pbits(void *vp, int max)
 {
@@ -324,9 +382,18 @@ pbits(void *vp, int max)
 	printf("\n");
 }
 
+void
+ufserr(const char *name)
+{
+	if (disk.d_error != NULL)
+		warnx("%s: %s", name, disk.d_error);
+	else if (errno)
+		warn("%s", name);
+}
+
 void
 usage(void)
 {
-	(void)fprintf(stderr, "usage: dumpfs filesys | device\n");
+	(void)fprintf(stderr, "usage: dumpfs [-m] filesys | device\n");
 	exit(1);
 }
-- 
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