Add -a to "auto-size" the tape, rather than relying upon other options
to define the tape size. Requires the tape driver to either return ENOSPC at end of media, or 0 when a write is attempted (such as the "early warning" support in st(4) enabled with "mt eew 1"). From FreeBSD.
This commit is contained in:
lukem
parent
e7408f3af1
commit
9dcaec9cca
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@ -1,4 +1,4 @@
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.\" $NetBSD: dump.8,v 1.43 2001/12/14 14:43:33 bouyer Exp $
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.\" $NetBSD: dump.8,v 1.44 2001/12/30 04:03:16 lukem Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" Regents of the University of California.
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@ -34,7 +34,7 @@
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.\"
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.\" @(#)dump.8 8.3 (Berkeley) 5/1/95
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.\"
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.Dd November 16, 2001
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.Dd December 30, 2001
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.Dt DUMP 8
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.Os
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.Sh NAME
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@ -43,17 +43,37 @@
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.Nd file system backup
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.Sh SYNOPSIS
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.Nm ""
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.Op Fl 0123456789ceFlnStu
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.Op Fl 0123456789aceFlnStu
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.Bk -words
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.Op Fl B Ar records
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.Ek
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.Bk -words
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.Op Fl b Ar blocksize
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.Ek
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.Bk -words
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.Op Fl d Ar density
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.Ek
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.Bk -words
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.Op Fl f Ar file
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.Ek
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.Bk -words
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.Op Fl h Ar level
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.Op Fl k Ar read blocksize
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.Ek
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.Bk -words
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.Op Fl k Ar read-blocksize
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.Ek
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.Bk -words
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.Op Fl L Ar label
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.Ek
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.Bk -words
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.Op Fl r Ar cachesize
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.Ek
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.Bk -words
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.Op Fl s Ar feet
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.Ek
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.Bk -words
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.Op Fl T Ar date
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.Ek
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.Ar files-to-dump
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.Nm ""
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.Op Fl W Li \&| Fl w
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@ -75,6 +95,11 @@ A dump that is larger than the output medium is broken into
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multiple volumes.
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On most media the size is determined by writing until an
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end-of-media indication is returned.
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This can be enforced
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by using the
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.Fl a
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option.
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.Pp
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On media that cannot reliably return an end-of-media indication
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(such as some cartridge tape drives)
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each volume is of a fixed size;
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@ -118,6 +143,14 @@ tells dump to
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copy all files new or modified since the
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last dump of a lower level.
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The default level is 9.
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.It Fl a
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.Dq auto-size .
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Bypass all tape length considerations, and enforce writing
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until an end-of-media indication is returned.
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This fits best for most modern tape drives.
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Use of this option is particularly recommended when appending to an
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existing tape, or using a tape drive with hardware compression (where
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you can never be sure about the compression ratio).
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.It Fl B Ar records
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The number of kilobytes per volume, rounded
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down to a multiple of the blocksize.
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@ -1,4 +1,4 @@
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/* $NetBSD: dump.h,v 1.32 2001/12/25 12:06:26 lukem Exp $ */
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/* $NetBSD: dump.h,v 1.33 2001/12/30 04:03:16 lukem Exp $ */
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/*-
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* Copyright (c) 1980, 1993
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@ -109,6 +109,7 @@ long tsize; /* tape size in 0.1" units */
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long asize; /* number of 0.1" units written on current tape */
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int etapes; /* estimated number of tapes */
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int nonodump; /* if set, do not honor UF_NODUMP user flags */
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int unlimited; /* if set, write to end of medium */
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extern int density; /* density in 0.1" units */
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extern int notify; /* notify operator flag */
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@ -1,4 +1,4 @@
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/* $NetBSD: main.c,v 1.48 2001/12/25 12:06:26 lukem Exp $ */
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/* $NetBSD: main.c,v 1.49 2001/12/30 04:03:17 lukem Exp $ */
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/*-
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* Copyright (c) 1980, 1991, 1993, 1994
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@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
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#if 0
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static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95";
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#else
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__RCSID("$NetBSD: main.c,v 1.48 2001/12/25 12:06:26 lukem Exp $");
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__RCSID("$NetBSD: main.c,v 1.49 2001/12/30 04:03:17 lukem Exp $");
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#endif
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#endif /* not lint */
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@ -140,7 +140,7 @@ main(int argc, char *argv[])
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obsolete(&argc, &argv);
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while ((ch = getopt(argc, argv,
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"0123456789B:b:cd:eFf:h:k:lL:nr:s:StT:uWw")) != -1)
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"0123456789aB:b:cd:eFf:h:k:lL:nr:s:StT:uWw")) != -1)
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switch (ch) {
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/* dump level */
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case '0': case '1': case '2': case '3': case '4':
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@ -148,6 +148,10 @@ main(int argc, char *argv[])
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level = ch;
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break;
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case 'a': /* `auto-size', Write to EOM. */
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unlimited = 1;
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break;
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case 'B': /* blocks per output file */
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blocksperfile = numarg("blocks per file", 1L, 0L);
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break;
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@ -336,7 +340,7 @@ main(int argc, char *argv[])
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if (blocksperfile)
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blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
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else {
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else if (!unlimited) {
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/*
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* Determine how to default tape size and density
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*
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@ -474,7 +478,7 @@ main(int argc, char *argv[])
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anydirskipped = mapdirs(maxino, &tapesize);
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}
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if (pipeout) {
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if (pipeout || unlimited) {
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tapesize += 10; /* 10 trailer blocks */
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msg("estimated %ld tape blocks.\n", tapesize);
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} else {
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@ -602,12 +606,13 @@ main(int argc, char *argv[])
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static void
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usage(void)
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{
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const char *prog = getprogname();
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(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
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"usage: dump [-0123456789ceFlnStu] [-B records] [-b blocksize] [-d density]",
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" [-f file] [-h level] [-k read block size] [-L label]",
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" [-r read cache size] [-s feet] [-T date] file system",
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" dump [-W | -w]");
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(void)fprintf(stderr,
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"usage: %s [-0123456789aceFlnStu] [-B records] [-b blocksize]\n"
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" [-d density] [-f file] [-h level] [-k read-blocksize]\n"
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" [-L label] [-r read-cache] [-s feet] [-T date] files-to-dump\n"
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" %s [-W | -w]\n", prog, prog);
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exit(X_STARTUP);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: tape.c,v 1.35 2001/12/25 12:06:26 lukem Exp $ */
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/* $NetBSD: tape.c,v 1.36 2001/12/30 04:03:17 lukem Exp $ */
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/*-
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* Copyright (c) 1980, 1991, 1993
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@ -38,7 +38,7 @@
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#if 0
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static char sccsid[] = "@(#)tape.c 8.4 (Berkeley) 5/1/95";
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#else
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__RCSID("$NetBSD: tape.c,v 1.35 2001/12/25 12:06:26 lukem Exp $");
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__RCSID("$NetBSD: tape.c,v 1.36 2001/12/30 04:03:17 lukem Exp $");
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#endif
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#endif /* not lint */
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@ -143,7 +143,7 @@ alloctape(void)
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* repositioning after stopping, i.e, streaming mode, where the gap is
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* variable, 0.30" to 0.45". The gap is maximal when the tape stops.
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*/
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if (blocksperfile == 0)
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if (blocksperfile == 0 && !unlimited)
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tenths = writesize / density +
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(cartridge ? 16 : density == 625 ? 5 : 8);
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/*
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@ -351,7 +351,7 @@ flushtape(void)
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asize += tenths;
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blockswritten += ntrec;
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blocksthisvol += ntrec;
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if (!pipeout && (blocksperfile ?
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if (!pipeout && !unlimited && (blocksperfile ?
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(blocksthisvol >= blocksperfile) : (asize > tsize))) {
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close_rewind();
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startnewtape(0);
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