Date: Sat, 1 Nov 2008 21:14:42 +0100 From: Max Laier <max@love2party.net> To: freebsd-hackers@freebsd.org Cc: pjd@freebsd.org, koitsu@freebsd.org, lhmwzy@gmail.com, Pete French <petefrench@ticketswitch.com> Subject: du -A / -B options [Re: zfs quota question] Message-ID: <200811012114.43137.max@love2party.net> In-Reply-To: <200810071314.45922.max@love2party.net> References: <E1KnA2b-0007ls-8u@dilbert.ticketswitch.com> <200810071314.45922.max@love2party.net>
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--Boundary-00=_ziLDJAOwuhgqv48 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi, a thread on freebsd-stable@ [1] about problems with du(1) and compressed zfs filesystems got me looking for a possible solution. Attached is a diff for du(1) that adds two new options: -A to display the apparent size of the file instead of the used blocks. -B bsize to specify a custom blocksize. In particular one <512byte The GNU du(1) has --apparent-size for -A, but we don't like long options. That's not to say that it couldn't be added for script compat. -B is probably not that interesting, but it can be helpful and came for free. Any objections against the general concept? It's rather complicated to get the apparent size of a directory hierarchy without scripting. I often wonder if some hierarchy will fit on a CD/DVD and compressed zfs makes this really difficult. As for the code, I know that there are a couple of style(9) errors in there - mostly because the lines already exceeded 80 chars before my changes and I plan to clean that up before I commit - should there be enough support for the change itself. Thoughts? [1] http://lists.freebsd.org/pipermail/freebsd-stable/2008-October/045698.html -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --Boundary-00=_ziLDJAOwuhgqv48 Content-Type: text/plain; charset="iso-8859-15"; name="du.AB.diff" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="du.AB.diff" Index: du.1 =================================================================== --- du.1 (revision 184513) +++ du.1 (working copy) @@ -40,11 +40,12 @@ .Nd display disk usage statistics .Sh SYNOPSIS .Nm +.Op Fl A .Op Fl H | L | P .Op Fl a | s | d Ar depth .Op Fl c .Op Fl l -.Op Fl h | k | m +.Op Fl h | k | m | B Ar blocksize .Op Fl n .Op Fl x .Op Fl I Ar mask @@ -60,6 +61,14 @@ .Pp The options are as follows: .Bl -tag -width indent +.It Fl A +Display the apparent size instead of the diskusage. +This can be helpful to find sparse files and when operating on +compressed volumes. +.It Fl B Ar blocksize +Display block counts in +.Ar blocksize +byte blocks. .It Fl H Symbolic links on the command line are followed, symbolic links in file hierarchies are not followed. @@ -136,14 +145,14 @@ If the environment variable .Ev BLOCKSIZE is set, and the -.Fl k -option is not specified, the block counts will be displayed in units of that +.Fl k, m, h, B +options are not specified, the block counts will be displayed in units of that size block. If .Ev BLOCKSIZE is not set, and the -.Fl k -option is not specified, the block counts will be displayed in 512-byte blocks. +.Fl k, m, h, B +options are not specified, the block counts will be displayed in 512-byte blocks. .El .Sh SEE ALSO .Xr df 1 , Index: du.c =================================================================== --- du.c (revision 184513) +++ du.c (working copy) @@ -86,27 +86,39 @@ FTS *fts; FTSENT *p; off_t savednumber = 0; - long blocksize; + long blocksize = 0; int ftsoptions; int listall; int depth; int Hflag, Lflag, Pflag, aflag, sflag, dflag, cflag; - int hflag, lflag, ch, notused, rval; + int Aflag, hflag, lflag, ch, notused, rval; char **save; static char dot[] = "."; setlocale(LC_ALL, ""); Hflag = Lflag = Pflag = aflag = sflag = dflag = cflag = hflag = - lflag = 0; + Aflag = lflag = 0; save = argv; ftsoptions = 0; depth = INT_MAX; SLIST_INIT(&ignores); - while ((ch = getopt(argc, argv, "HI:LPasd:chklmnrx")) != -1) + while ((ch = getopt(argc, argv, "AB:HI:LPasd:chklmnrx")) != -1) switch (ch) { + case 'A': + Aflag = 1; + if (blocksize == 0) + blocksize = 1; + break; + case 'B': + blocksize = atoi(optarg); + if (errno == ERANGE || blocksize < 0) { + warnx("invalid argument to option B: %s", optarg); + usage(); + } + break; case 'H': Hflag = 1; break; @@ -142,23 +154,18 @@ cflag = 1; break; case 'h': - if (setenv("BLOCKSIZE", "512", 1) == -1) - warn( - "setenv: cannot set BLOCKSIZE=512"); hflag = 1; break; case 'k': hflag = 0; - if (setenv("BLOCKSIZE", "1024", 1) == -1) - warn("setenv: cannot set BLOCKSIZE=1024"); + blocksize = 1024; break; case 'l': lflag = 1; break; case 'm': hflag = 0; - if (setenv("BLOCKSIZE", "1048576", 1) == -1) - warn("setenv: cannot set BLOCKSIZE=1048576"); + blocksize = 1048576; break; case 'n': nodumpflag = 1; @@ -222,8 +229,8 @@ argv[1] = NULL; } - (void) getbsize(¬used, &blocksize); - blocksize /= 512; + if (blocksize == 0) + (void) getbsize(¬used, &blocksize); rval = 0; @@ -241,15 +248,21 @@ break; p->fts_parent->fts_bignum += - p->fts_bignum += p->fts_statp->st_blocks; + p->fts_bignum += Aflag ? + p->fts_statp->st_size : + p->fts_statp->st_blocks; if (p->fts_level <= depth) { if (hflag) { - (void) prthumanval(howmany(p->fts_bignum, blocksize)); + (void) prthumanval(Aflag ? + p->fts_bignum : + p->fts_bignum * DEV_BSIZE); (void) printf("\t%s\n", p->fts_path); } else { (void) printf("%jd\t%s\n", - (intmax_t)howmany(p->fts_bignum, blocksize), + (intmax_t)howmany(Aflag ? + p->fts_bignum : + p->fts_bignum * DEV_BSIZE, blocksize), p->fts_path); } } @@ -272,17 +285,23 @@ if (listall || p->fts_level == 0) { if (hflag) { - (void) prthumanval(howmany(p->fts_statp->st_blocks, - blocksize)); + (void) prthumanval(Aflag ? + p->fts_statp->st_size : + p->fts_statp->st_blocks * DEV_BSIZE); (void) printf("\t%s\n", p->fts_path); } else { (void) printf("%jd\t%s\n", - (intmax_t)howmany(p->fts_statp->st_blocks, blocksize), - p->fts_path); + (intmax_t)howmany( Aflag ? + p->fts_statp->st_size : + p->fts_statp->st_blocks * + DEV_BSIZE, blocksize), + p->fts_path); } } - p->fts_parent->fts_bignum += p->fts_statp->st_blocks; + p->fts_parent->fts_bignum += Aflag ? + p->fts_statp->st_size : + p->fts_statp->st_blocks; } savednumber = p->fts_parent->fts_bignum; } @@ -441,8 +460,6 @@ { char buf[5]; - bytes *= DEV_BSIZE; - humanize_number(buf, sizeof(buf), bytes, "", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL); @@ -453,8 +470,9 @@ usage(void) { (void)fprintf(stderr, - "usage: du [-H | -L | -P] [-a | -s | -d depth] [-c] " - "[-l] [-h | -k | -m] [-n] [-x] [-I mask] [file ...]\n"); + "usage: du [-A] [-H | -L | -P] [-a | -s | -d depth] [-c] " + "[-l] [-h | -k | -m | -B bsize] [-n] [-x] [-I mask] " + "[file ...]\n"); exit(EX_USAGE); } --Boundary-00=_ziLDJAOwuhgqv48--
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