2 * Copyright (c) 1980, 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
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20 * This product includes software developed by the University of
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38 * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
39 * @(#)df.c 8.9 (Berkeley) 5/8/95
40 * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $
43 #include <sys/cdefs.h>
44 #include <sys/param.h>
46 #include <sys/mount.h>
47 #include <sys/sysctl.h>
48 #include <sys/statvfs.h>
50 #include <vfs/ufs/dinode.h>
51 #include <vfs/ufs/fs.h>
52 #include <vfs/ufs/ufsmount.h>
68 /* Maximum widths of various fields. */
78 int bread(off_t, void *, int);
79 int checkvfsname(const char *, char **);
80 char *getmntpt(char *);
81 int quadwidth(int64_t);
82 char *makenetvfslist(void);
83 char **makevfslist(char *);
84 void prthuman(struct statvfs *, int64_t);
85 void prthumanval(int64_t);
86 void prtstat(struct statfs *, struct statvfs *, struct maxwidths *);
87 long regetmntinfo(struct statfs **, struct statvfs **, long, char **);
88 int ufs_df(char *, struct maxwidths *);
89 void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *);
92 int aflag = 0, hflag, iflag, nflag;
98 return (a > b ? a : b);
101 static __inline int64_t
102 qmax(int64_t a, int64_t b)
104 return (a > b ? a : b);
108 main(int argc, char **argv)
111 struct statfs statfsbuf, *mntbuf;
112 struct statvfs statvfsbuf, *mntvbuf;
113 struct maxwidths maxwidths;
115 char *mntpath, *mntpt, **vfslist;
122 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
130 if (setenv("BLOCKSIZE", "512", 1) != 0)
131 warn("setenv: cannot set BLOCKSIZE=512");
135 if (setenv("BLOCKSIZE", "1g", 1) != 0)
136 warn("setenv: cannot set BLOCKSIZE=1g");
149 if (setenv("BLOCKSIZE", "1k", 1) != 0)
150 warn("setenv: cannot set BLOCKSIZE=1k");
155 errx(1, "-l and -t are mutually exclusive.");
156 vfslist = makevfslist(makenetvfslist());
159 if (setenv("BLOCKSIZE", "1m", 1) != 0)
160 warn("setenv: cannot set BLOCKSIZE=1m");
168 errx(1, "only one -t option may be specified");
170 vfslist = makevfslist(optarg);
179 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
180 bzero(&maxwidths, sizeof(maxwidths));
181 for (i = 0; i < mntsize; i++)
182 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
186 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist);
187 bzero(&maxwidths, sizeof(maxwidths));
188 for (i = 0; i < mntsize; i++)
189 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
190 for (i = 0; i < mntsize; i++) {
191 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
192 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths);
197 for (; *argv; argv++) {
198 if (stat(*argv, &stbuf) < 0) {
199 if ((mntpt = getmntpt(*argv)) == NULL) {
204 } else if (S_ISCHR(stbuf.st_mode)) {
205 if ((mntpt = getmntpt(*argv)) == NULL) {
207 mntpath = strdup("/tmp/df.XXXXXX");
208 if (mntpath == NULL) {
209 warn("strdup failed");
213 mntpt = mkdtemp(mntpath);
215 warn("mkdtemp(\"%s\") failed", mntpath);
220 if (mount(fstype, mntpt, MNT_RDONLY,
222 rv = ufs_df(*argv, &maxwidths) || rv;
226 } else if (statfs(mntpt, &statfsbuf) == 0 &&
227 statvfs(mntpt, &statvfsbuf) == 0) {
228 statfsbuf.f_mntonname[0] = '\0';
229 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
242 * Statfs does not take a `wait' flag, so we cannot
243 * implement nflag here.
245 if (statfs(mntpt, &statfsbuf) < 0) {
250 if (statvfs(mntpt, &statvfsbuf) < 0) {
256 * Check to make sure the arguments we've been given are
257 * satisfied. Return an error if we have been asked to
258 * list a mount point that does not match the other args
259 * we've been given (-l, -t, etc.).
261 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
267 bzero(&maxwidths, sizeof(maxwidths));
268 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf);
270 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
279 struct statfs *mntbuf;
280 struct statvfs *mntvbuf;
282 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
283 for (i = 0; i < mntsize; i++) {
284 if (!strcmp(mntbuf[i].f_mntfromname, name))
285 return (mntbuf[i].f_mntonname);
291 * Make a pass over the filesystem info in ``mntbuf'' filtering out
292 * filesystem types not in vfslist and possibly re-stating to get
293 * current (not cached) info. Returns the new count of valid statfs bufs.
296 regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist)
299 struct statfs *mntbuf;
300 struct statvfs *mntvbuf;
303 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT));
307 for (j = 0, i = 0; i < mntsize; i++) {
308 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
311 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
312 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]);
314 mntbuf[j] = mntbuf[i];
315 mntvbuf[j] = mntvbuf[i];
323 prthuman(struct statvfs *vsfsp, int64_t used)
325 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize);
326 prthumanval(used * vsfsp->f_bsize);
327 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize);
331 prthumanval(int64_t bytes)
336 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
337 if (hflag == UNITS_SI)
338 flags |= HN_DIVISOR_1000;
340 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
341 bytes, "", HN_AUTOSCALE, flags);
347 * Convert statfs returned filesystem size into BLOCKSIZE units.
348 * Attempts to avoid overflow for large filesystems.
351 fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize)
353 if (bsize != 0 && bsize < reqbsize)
354 return (num / (intmax_t)(reqbsize / bsize));
356 return (num * (intmax_t)(bsize / reqbsize));
360 * Print out status about a filesystem.
363 prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp)
365 static long blocksize;
366 static int headerlen, timesthrough;
367 static const char *header;
368 int64_t used, availblks, inodes;
370 if (++timesthrough == 1) {
371 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
374 mwp->total = mwp->used = mwp->avail = strlen(header);
376 header = getbsize(&headerlen, &blocksize);
377 mwp->total = imax(mwp->total, headerlen);
379 mwp->used = imax(mwp->used, strlen("Used"));
380 mwp->avail = imax(mwp->avail, strlen("Avail"));
382 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
383 "Filesystem", mwp->total, header, mwp->used, "Used",
384 mwp->avail, "Avail");
386 mwp->iused = imax(mwp->iused, strlen(" iused"));
387 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
388 printf(" %*s %*s %%iused", mwp->iused - 2,
389 "iused", mwp->ifree, "ifree");
391 printf(" Mounted on\n");
393 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
394 used = vsfsp->f_blocks - vsfsp->f_bfree;
395 availblks = vsfsp->f_bavail + used;
397 prthuman(vsfsp, used);
399 printf(" %*jd %*jd %*jd", mwp->total,
400 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize),
401 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize),
402 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize,
406 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
408 inodes = vsfsp->f_files;
409 used = inodes - vsfsp->f_ffree;
410 printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
411 mwp->ifree, (intmax_t)vsfsp->f_ffree, inodes == 0 ? 100.0 :
412 (double)used / (double)inodes * 100.0);
415 printf(" %s\n", sfsp->f_mntonname);
419 * Update the maximum field-width information in `mwp' based on
420 * the filesystem specified by `sfsp'.
423 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp)
425 static long blocksize;
429 getbsize(&dummy, &blocksize);
431 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
432 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks,
433 vsfsp->f_bsize, blocksize)));
434 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks -
435 vsfsp->f_bfree, vsfsp->f_bsize, blocksize)));
436 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail,
437 vsfsp->f_bsize, blocksize)));
438 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files -
440 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree));
443 /* Return the width in characters of the specified long. */
445 quadwidth(int64_t val)
450 /* Negative or zero values require one extra digit. */
463 * This code constitutes the pre-system call Berkeley df code for extracting
464 * information from filesystem superblocks.
471 #define sblock sb.iu_fs
476 ufs_df(char *file, struct maxwidths *mwp)
478 struct statfs statfsbuf;
479 struct statvfs statvfsbuf;
481 struct statvfs *vsfsp;
488 if ((rfd = open(file, O_RDONLY)) < 0) {
492 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
499 strcpy(sfsp->f_fstypename, "ufs");
501 sfsp->f_bsize = vsfsp->f_bsize = sblock.fs_fsize;
502 sfsp->f_iosize = vsfsp->f_frsize = sblock.fs_bsize;
503 sfsp->f_blocks = vsfsp->f_blocks = sblock.fs_dsize;
504 sfsp->f_bfree = vsfsp->f_bfree =
505 sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
506 sblock.fs_cstotal.cs_nffree;
507 sfsp->f_bavail = vsfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
508 sfsp->f_files = vsfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
509 sfsp->f_ffree = vsfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
510 sfsp->f_fsid.val[0] = 0;
511 sfsp->f_fsid.val[1] = 0;
512 if ((mntpt = getmntpt(file)) == NULL)
514 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
515 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
516 prtstat(sfsp, vsfsp, mwp);
522 bread(off_t off, void *buf, int cnt)
526 lseek(rfd, off, SEEK_SET);
527 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
528 /* Probably a dismounted disk if errno == EIO. */
530 fprintf(stderr, "\ndf: %lld: %s\n",
531 (long long)off, strerror(nr > 0 ? EIO : errno));
542 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
549 char *str, *strptr, **listptr;
550 int mib[3], maxvfsconf, cnt=0, i;
552 struct ovfsconf *ptr;
554 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
555 miblen=sizeof(maxvfsconf);
556 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
557 &maxvfsconf, &miblen, NULL, 0)) {
558 warnx("sysctl failed");
562 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
563 warnx("malloc failed");
567 for (ptr = getvfsent(); ptr; ptr = getvfsent())
568 if (ptr->vfc_flags & VFCF_NETWORK) {
569 listptr[cnt++] = strdup(ptr->vfc_name);
570 if (listptr[cnt-1] == NULL) {
571 warnx("malloc failed");
577 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
579 warnx("malloc failed");
584 *str = 'n'; *(str + 1) = 'o';
585 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
586 strncpy(strptr, listptr[i], 32);
587 strptr += strlen(listptr[i]);