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Allow use of the name "swap" instead of an actual swap device.

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This makes configuration of mfs /tmp on diskless clients more intuitive
for people like me, that have used this feature on NetBSD and SunOS.
Using the -T option and /dev/null, while already supported,
is neither intuitive nor documented in the handbook.
Obtained from: NetBSD
This commit is contained in:
Tor Egge 1997-06-23 22:44:51 +00:00
parent 135a88d805
commit dc6f8d1bd5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=26856
1 changed files with 31 additions and 0 deletions
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31
sbin/newfs/newfs.c
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@ -211,6 +211,7 @@ main(argc, argv)
register int ch;
register struct partition *pp;
register struct disklabel *lp;
struct disklabel mfsfakelabel;
struct disklabel *getdisklabel();
struct partition oldpartition;
struct stat st;
@ -356,6 +357,35 @@ main(argc, argv)
usage();
special = argv[0];
/* Copy the NetBSD way of faking up a disk label */
if (mfs && !strcmp(special, "swap")) {
/*
* it's an MFS, mounted on "swap." fake up a label.
* XXX XXX XXX
*/
fso = -1; /* XXX; normally done below. */
memset(&mfsfakelabel, 0, sizeof(mfsfakelabel));
mfsfakelabel.d_secsize = 512;
mfsfakelabel.d_nsectors = 64;
mfsfakelabel.d_ntracks = 16;
mfsfakelabel.d_ncylinders = 16;
mfsfakelabel.d_secpercyl = 1024;
mfsfakelabel.d_secperunit = 16384;
mfsfakelabel.d_rpm = 3600;
mfsfakelabel.d_interleave = 1;
mfsfakelabel.d_npartitions = 1;
mfsfakelabel.d_partitions[0].p_size = 16384;
mfsfakelabel.d_partitions[0].p_fsize = 1024;
mfsfakelabel.d_partitions[0].p_frag = 8;
mfsfakelabel.d_partitions[0].p_cpg = 16;
lp = &mfsfakelabel;
pp = &mfsfakelabel.d_partitions[0];
goto havelabel;
}
cp = strrchr(special, '/');
if (cp == 0) {
/*
@ -430,6 +460,7 @@ main(argc, argv)
fatal("%s: `%c' partition overlaps boot program",
argv[0], *cp);
}
havelabel:
if (fssize == 0)
fssize = pp->p_size;
if (fssize > pp->p_size && !mfs)