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https://marc.info/?l=openbsd-techm=143441062327954w=2
Index: sbin/dump/dump.8
===
RCS file: /cvs/src/sbin/dump/dump.8,v
retrieving revision 1.49
diff -u -p -r1.49 dump.8
--- sbin/dump/dump.83 May 2015 01:44:34 - 1.49
+++ sbin/dump/dump.815 Jun 2015 23:16:10 -
@@ -40,7 +40,7 @@
.Sh SYNOPSIS
.Nm dump
.Bk -words
-.Op Fl 0123456789acnSuWw
+.Op Fl 0123456789AcnSuWw
.Op Fl B Ar records
.Op Fl b Ar blocksize
.Op Fl d Ar density
@@ -62,8 +62,8 @@ A dump that is larger than the output me
multiple volumes.
On most media the size is determined by writing until an
end-of-media indication is returned.
-This can be enforced by using the
-.Fl a
+This is the default behavior and can be overridden with the
+.Fl A
option.
.Pp
.Nm
@@ -98,7 +98,10 @@ On media that cannot reliably return an
each volume is of a fixed size;
the actual size is determined by the tape size, density and/or
block count options below.
-By default, the same output file name is used for each volume
+The
+.Fl A
+option should be used with such media.
+The same output file name is used for each volume
after prompting the operator to change media.
.Pp
Rewinding or ejecting tape features after a close operation on
@@ -126,15 +129,24 @@ to
copy all files new or modified since the
last dump of a lower level.
The default level is 0.
-.It Fl a
-.Dq auto-size .
-Bypass all tape length considerations, and enforce writing until
-an end-of-media indication is returned.
-This option is recommended for most modern tape drives.
-Use of this option is particularly
-recommended when appending to an existing tape, or using a tape
-drive with hardware compression (where you can never be sure about
-the compression ratio).
+.It Fl A
+.Dq fixed-size .
+Assume that the media cannot reliably return
+an end-of-media indication, and therefore use fixed
+volume sizes.
+.Nm
+will prompt the operator
+for the readiness of each
+volume before it is written to.
+.Pp
+This was once the default behavior of
+.Nm dump Ns ,
+while the
+.Fl a
+option enforced auto-sizing. The default was reversed
+because backup volumes
+without end-of-media indication are becoming
+increasingly rare.
.It Fl B Ar records
The number of kilobytes per volume, rounded
down to a multiple of the blocksize.
@@ -451,6 +463,13 @@ The
.Bx 4.3
option syntax is implemented for backward compatibility but
is not documented here.
+.Pp
+The
+.Fl A
+option first appeared and the
+.Fl a
+option was removed in
+.Ox 5.8 .
.Sh BUGS
Fewer than 32 read errors on the filesystem are ignored.
.Pp
Index: sbin/dump/dump.h
===
RCS file: /cvs/src/sbin/dump/dump.h,v
retrieving revision 1.24
diff -u -p -r1.24 dump.h
--- sbin/dump/dump.h23 May 2015 05:17:20 - 1.24
+++ sbin/dump/dump.h15 Jun 2015 23:16:10 -
@@ -68,7 +68,7 @@ int newtape;/* new tape flag */
intdensity;/* density in 0.1 units */
int64_ttapesize; /* estimated tape size, blocks */
int64_ttsize; /* tape size in 0.1 units */
-intunlimited; /* if set, write to end of medium */
+intfixed; /* if set, use fixed volume size */
int64_tasize; /* number of 0.1 units written on current tape
*/
intetapes; /* estimated number of tapes */
intnonodump; /* if set, do not honor UF_NODUMP user flags */
Index: sbin/dump/main.c
===
RCS file: /cvs/src/sbin/dump/main.c,v
retrieving revision 1.56
diff -u -p -r1.56 main.c
--- sbin/dump/main.c23 May 2015 05:17:20 - 1.56
+++ sbin/dump/main.c15 Jun 2015 23:16:10 -
@@ -115,7 +115,7 @@ main(int argc, char *argv[])
usage();
obsolete(argc, argv);
- while ((ch = getopt(argc, argv, 0123456789aB:b:cd:f:h:ns:ST:uWw)) !=
-1)
+ while ((ch = getopt(argc, argv, 0123456789AB:b:cd:f:h:ns:ST:uWw)) !=
-1)
switch (ch) {
/* dump level */
case '0': case '1': case '2': case '3': case '4':
@@ -193,8 +193,8 @@ main(int argc, char *argv[])
exit(X_FINOK); /* do nothing else */
break;
- case 'a': /* `auto-size', Write to EOM. */
- unlimited = 1;
+ case 'A': /* `fixed-size' volumes */
+ fixed = 1;
break;
default:
@@ -291,7 +291,7 @@ main(int argc, char *argv[])
if (blocksperfile)
blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
- else if (!unlimited) {
+ else if (fixed) {
/*
* Determine how to default tape size and density
*
@@
