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Add a -l option to show file system's corresponding /dev/ufsid path.

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This is useful for scripts that converts existing system's fstab to
use their /dev/ufsid devices.

MFC after:	2 weeks
This commit is contained in:
Xin LI 2011-07-14 08:06:03 +00:00
parent 5375015146
commit e293d08775
2 changed files with 26 additions and 5 deletions
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11
sbin/dumpfs/dumpfs.8
View File

@ -28,7 +28,7 @@
.\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93
.\" $FreeBSD$
.\"
.Dd May 8, 2011
.Dd Jul 14, 2011
.Dt DUMPFS 8
.Os
.Sh NAME
@ -37,6 +37,7 @@
.Sh SYNOPSIS
.Nm
.Op Fl f
.Op Fl l
.Op Fl m
.Ar filesys | device
.Sh DESCRIPTION
@ -44,7 +45,8 @@ The
.Nm
utility prints out the UFS super block and cylinder group information
for the file system or special device specified, unless the
.Fl f
.Fl f ,
.Fl l
or
.Fl m
flag is specified.
@ -64,6 +66,11 @@ Fragment numbers may be converted to raw byte offsets by multiplying by the
fragment size, which may be useful when recovering deleted data.
.Pp
If
.Fl l
is specified, the pathname to the file system's container derived from
its unique identifier is printed.
.Pp
If
.Fl m
is specified, a
.Xr newfs 8

20
sbin/dumpfs/dumpfs.c
View File

@ -79,6 +79,7 @@ static const char rcsid[] =
struct uufsd disk;
int dumpfs(const char *);
int dumpfsid(void);
int dumpcg(void);
int dumpfreespace(const char *, int);
void dumpfreespacecg(int);
@ -92,11 +93,11 @@ int
main(int argc, char *argv[])
{
const char *name;
int ch, dofreespace, domarshal, eval;
int ch, dofreespace, domarshal, dolabel, eval;
dofreespace = domarshal = eval = 0;
dofreespace = domarshal = dolabel = eval = 0;
while ((ch = getopt(argc, argv, "fm")) != -1) {
while ((ch = getopt(argc, argv, "lfm")) != -1) {
switch (ch) {
case 'f':
dofreespace++;
@ -104,6 +105,9 @@ main(int argc, char *argv[])
case 'm':
domarshal = 1;
break;
case 'l':
dolabel = 1;
break;
case '?':
default:
usage();
@ -129,6 +133,8 @@ main(int argc, char *argv[])
eval |= dumpfreespace(name, dofreespace);
else if (domarshal)
eval |= marshal(name);
else if (dolabel)
eval |= dumpfsid();
else
eval |= dumpfs(name);
ufs_disk_close(&disk);
@ -136,6 +142,14 @@ main(int argc, char *argv[])
exit(eval);
}
int
dumpfsid(void)
{
printf("/dev/ufsid/%x%x\n", afs.fs_id[0], afs.fs_id[1]);
return 0;
}
int
dumpfs(const char *name)
{