/* $OpenBSD: du.c,v 1.11 2002/02/16 21:27:45 millert Exp $ */ /* $NetBSD: du.c,v 1.11 1996/10/18 07:20:35 thorpej Exp $ */ /* * Copyright (c) 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Newcomb. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1989, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95"; #else static char rcsid[] = "$OpenBSD: du.c,v 1.11 2002/02/16 21:27:45 millert Exp $"; #endif #endif /* not lint */ #include <sys/types.h> #include <sys/stat.h> #include <dirent.h> #include <err.h> #include <errno.h> #include <fts.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> int linkchk(FTSENT *); void prtout(quad_t, char *, int); void usage(void); int main(argc, argv) int argc; char *argv[]; { FTS *fts; FTSENT *p; long blocksize; quad_t totalblocks; int ftsoptions, listdirs, listfiles; int Hflag, Lflag, Pflag, aflag, cflag, hflag, kflag, sflag; int ch, notused, rval; char **save; save = argv; Hflag = Lflag = Pflag = aflag = cflag = hflag = kflag = sflag = 0; totalblocks = 0; ftsoptions = FTS_PHYSICAL; while ((ch = getopt(argc, argv, "HLPachksxr")) != -1) switch (ch) { case 'H': Hflag = 1; Lflag = Pflag = 0; break; case 'L': Lflag = 1; Hflag = Pflag = 0; break; case 'P': Pflag = 1; Hflag = Lflag = 0; break; case 'a': aflag = 1; break; case 'c': cflag = 1; break; case 'h': hflag = 1; break; case 'k': kflag = 1; break; case 's': sflag = 1; break; case 'r': break; case 'x': ftsoptions |= FTS_XDEV; break; case '?': default: usage(); } argc -= optind; argv += optind; /* * XXX * Because of the way that fts(3) works, logical walks will not count * the blocks actually used by symbolic links. We rationalize this by * noting that users computing logical sizes are likely to do logical * copies, so not counting the links is correct. The real reason is * that we'd have to re-implement the kernel's symbolic link traversing * algorithm to get this right. If, for example, you have relative * symbolic links referencing other relative symbolic links, it gets * very nasty, very fast. The bottom line is that it's documented in * the man page, so it's a feature. */ if (Hflag) ftsoptions |= FTS_COMFOLLOW; if (Lflag) { ftsoptions &= ~FTS_PHYSICAL; ftsoptions |= FTS_LOGICAL; } if (aflag) { if (sflag) usage(); listdirs = listfiles = 1; } else if (sflag) listdirs = listfiles = 0; else { listfiles = 0; listdirs = 1; } if (!*argv) { argv = save; argv[0] = "."; argv[1] = NULL; } if (hflag) blocksize = 512; else if (kflag) blocksize = 1024; else (void)getbsize(¬used, &blocksize); blocksize /= 512; if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL) err(1, "fts_open"); for (rval = 0; (p = fts_read(fts)) != NULL;) switch (p->fts_info) { case FTS_D: /* Ignore. */ break; case FTS_DP: p->fts_parent->fts_number += p->fts_number += p->fts_statp->st_blocks; if (cflag) totalblocks += p->fts_statp->st_blocks; /* * If listing each directory, or not listing files * or directories and this is post-order of the * root of a traversal, display the total. */ if (listdirs || (!listfiles && !p->fts_level)) prtout((quad_t)howmany(p->fts_number, blocksize), p->fts_path, hflag); break; case FTS_DC: /* Ignore. */ break; case FTS_DNR: /* Warn, continue. */ case FTS_ERR: case FTS_NS: warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); rval = 1; break; default: if (p->fts_statp->st_nlink > 1 && linkchk(p)) break; /* * If listing each file, or a non-directory file was * the root of a traversal, display the total. */ if (listfiles || !p->fts_level) prtout(howmany(p->fts_statp->st_blocks, blocksize), p->fts_path, hflag); p->fts_parent->fts_number += p->fts_statp->st_blocks; if (cflag) totalblocks += p->fts_statp->st_blocks; } if (errno) err(1, "fts_read"); if (cflag) { prtout((quad_t)howmany(totalblocks, blocksize), "total", hflag); } exit(rval); } typedef struct _ID { dev_t dev; ino_t inode; } ID; int linkchk(p) FTSENT *p; { static ID *files; static int maxfiles, nfiles; ID *fp, *start; ino_t ino; dev_t dev; ino = p->fts_statp->st_ino; dev = p->fts_statp->st_dev; if ((start = files) != NULL) for (fp = start + nfiles - 1; fp >= start; --fp) if (ino == fp->inode && dev == fp->dev) return (1); if (nfiles == maxfiles && (files = realloc((char *)files, (u_int)(sizeof(ID) * (maxfiles += 128)))) == NULL) err(1, "can't allocate memory"); files[nfiles].inode = ino; files[nfiles].dev = dev; ++nfiles; return (0); } /* * "human-readable" output: use 3 digits max.--put unit suffixes at * the end. Makes output compact and easy-to-read. */ typedef enum { NONE = 0, KILO, MEGA, GIGA, TERA, PETA /* , EXA */ } unit_t; unit_t unit_adjust(val) double *val; { double abval; unit_t unit; abval = fabs(*val); if (abval < 1024) unit = NONE; else if (abval < 1048576ULL) { unit = KILO; *val /= 1024; } else if (abval < 1073741824ULL) { unit = MEGA; *val /= 1048576; } else if (abval < 1099511627776ULL) { unit = GIGA; *val /= 1073741824ULL; } else if (abval < 1125899906842624ULL) { unit = TERA; *val /= 1099511627776ULL; } else /* if (abval < 1152921504606846976ULL) */ { unit = PETA; *val /= 1125899906842624ULL; } return (unit); } void prtout(size, path, hflag) quad_t size; char *path; int hflag; { unit_t unit; double bytes; if (!hflag) (void)printf("%lld\t%s\n", (long long)size, path); else { bytes = (double)size * 512.0; unit = unit_adjust(&bytes); if (bytes == 0) (void)printf("0B\t%s\n", path); else if (bytes > 10) (void)printf("%.0f%c\t%s\n", bytes, "BKMGTPE"[unit], path); else (void)printf("%.1f%c\t%s\n", bytes, "BKMGTPE"[unit], path); } } void usage() { (void)fprintf(stderr, "usage: du [-H | -L | -P] [-a | -s] [-chkrx] [file ...]\n"); exit(1); }