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/param.h>
45 #include <sys/mount.h>
46 #include <sys/sysctl.h>
47 #include <sys/statvfs.h>
49 #include <vfs/ufs/dinode.h>
50 #include <vfs/ufs/fs.h>
51 #include <vfs/ufs/ufsmount.h>
67 /* Maximum widths of various fields. */
77 int bread(off_t, void *, int);
78 int checkvfsname(const char *, char **);
79 char *getmntpt(char *);
80 int quadwidth(int64_t);
81 char *makenetvfslist(void);
82 char **makevfslist(char *);
83 void prthuman(struct statvfs *, int64_t);
84 void prthumanval(int64_t);
85 void prtstat(struct statfs *, struct statvfs *, struct maxwidths *);
86 long regetmntinfo(struct statfs **, struct statvfs **, long, char **);
87 int ufs_df(char *, struct maxwidths *);
88 void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *);
91 int aflag = 0, hflag, iflag, nflag;
97 return (a > b ? a : b);
100 static __inline int64_t
101 qmax(int64_t a, int64_t b)
103 return (a > b ? a : b);
107 main(int argc, char **argv)
110 struct statfs statfsbuf, *mntbuf;
111 struct statvfs statvfsbuf, *mntvbuf;
112 struct maxwidths maxwidths;
114 char *mntpath, *mntpt, **vfslist;
121 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
129 if (setenv("BLOCKSIZE", "512", 1) != 0)
130 warn("setenv: cannot set BLOCKSIZE=512");
134 if (setenv("BLOCKSIZE", "1g", 1) != 0)
135 warn("setenv: cannot set BLOCKSIZE=1g");
148 if (setenv("BLOCKSIZE", "1k", 1) != 0)
149 warn("setenv: cannot set BLOCKSIZE=1k");
154 errx(1, "-l and -t are mutually exclusive.");
155 vfslist = makevfslist(makenetvfslist());
158 if (setenv("BLOCKSIZE", "1m", 1) != 0)
159 warn("setenv: cannot set BLOCKSIZE=1m");
167 errx(1, "only one -t option may be specified");
169 vfslist = makevfslist(optarg);
178 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
179 bzero(&maxwidths, sizeof(maxwidths));
180 for (i = 0; i < mntsize; i++)
181 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
185 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist);
186 bzero(&maxwidths, sizeof(maxwidths));
187 for (i = 0; i < mntsize; i++)
188 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
189 for (i = 0; i < mntsize; i++) {
190 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
191 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths);
196 for (; *argv; argv++) {
197 if (stat(*argv, &stbuf) < 0) {
198 if ((mntpt = getmntpt(*argv)) == NULL) {
203 } else if (S_ISCHR(stbuf.st_mode)) {
204 if ((mntpt = getmntpt(*argv)) == NULL) {
206 mntpath = strdup("/tmp/df.XXXXXX");
207 if (mntpath == NULL) {
208 warn("strdup failed");
212 mntpt = mkdtemp(mntpath);
214 warn("mkdtemp(\"%s\") failed", mntpath);
219 if (mount(fstype, mntpt, MNT_RDONLY,
221 rv = ufs_df(*argv, &maxwidths) || rv;
225 } else if (statfs(mntpt, &statfsbuf) == 0 &&
226 statvfs(mntpt, &statvfsbuf) == 0) {
227 statfsbuf.f_mntonname[0] = '\0';
228 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
241 * Statfs does not take a `wait' flag, so we cannot
242 * implement nflag here.
244 if (statfs(mntpt, &statfsbuf) < 0) {
249 if (statvfs(mntpt, &statvfsbuf) < 0) {
255 * Check to make sure the arguments we've been given are
256 * satisfied. Return an error if we have been asked to
257 * list a mount point that does not match the other args
258 * we've been given (-l, -t, etc.).
260 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
266 bzero(&maxwidths, sizeof(maxwidths));
267 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf);
269 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
278 struct statfs *mntbuf;
279 struct statvfs *mntvbuf;
281 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
282 for (i = 0; i < mntsize; i++) {
283 if (!strcmp(mntbuf[i].f_mntfromname, name))
284 return (mntbuf[i].f_mntonname);
290 * Make a pass over the filesystem info in ``mntbuf'' filtering out
291 * filesystem types not in vfslist and possibly re-stating to get
292 * current (not cached) info. Returns the new count of valid statfs bufs.
295 regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist)
298 struct statfs *mntbuf;
299 struct statvfs *mntvbuf;
302 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT));
306 for (j = 0, i = 0; i < mntsize; i++) {
307 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
310 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
311 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]);
313 mntbuf[j] = mntbuf[i];
314 mntvbuf[j] = mntvbuf[i];
322 prthuman(struct statvfs *vsfsp, int64_t used)
324 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize);
325 prthumanval(used * vsfsp->f_bsize);
326 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize);
330 prthumanval(int64_t bytes)
335 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
336 if (hflag == UNITS_SI)
337 flags |= HN_DIVISOR_1000;
339 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
340 bytes, "", HN_AUTOSCALE, flags);
346 * Convert statfs returned filesystem size into BLOCKSIZE units.
347 * Attempts to avoid overflow for large filesystems.
350 fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize)
352 if (bsize != 0 && bsize < reqbsize)
353 return (num / (intmax_t)(reqbsize / bsize));
355 return (num * (intmax_t)(bsize / reqbsize));
359 * Print out status about a filesystem.
362 prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp)
364 static long blocksize;
365 static int headerlen, timesthrough;
366 static const char *header;
367 int64_t used, availblks, inodes;
369 if (++timesthrough == 1) {
370 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
373 mwp->total = mwp->used = mwp->avail = strlen(header);
375 header = getbsize(&headerlen, &blocksize);
376 mwp->total = imax(mwp->total, headerlen);
378 mwp->used = imax(mwp->used, strlen("Used"));
379 mwp->avail = imax(mwp->avail, strlen("Avail"));
381 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
382 "Filesystem", mwp->total, header, mwp->used, "Used",
383 mwp->avail, "Avail");
385 mwp->iused = imax(mwp->iused, strlen(" iused"));
386 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
387 printf(" %*s %*s %%iused", mwp->iused - 2,
388 "iused", mwp->ifree, "ifree");
390 printf(" Mounted on\n");
392 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
393 used = vsfsp->f_blocks - vsfsp->f_bfree;
394 availblks = vsfsp->f_bavail + used;
396 prthuman(vsfsp, used);
398 printf(" %*jd %*jd %*jd", mwp->total,
399 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize),
400 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize),
401 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize,
405 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
407 inodes = vsfsp->f_files;
408 used = inodes - vsfsp->f_ffree;
409 printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
410 mwp->ifree, (intmax_t)vsfsp->f_ffree, inodes == 0 ? 100.0 :
411 (double)used / (double)inodes * 100.0);
414 printf(" %s\n", sfsp->f_mntonname);
418 * Update the maximum field-width information in `mwp' based on
419 * the filesystem specified by `sfsp'.
422 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp)
424 static long blocksize;
428 getbsize(&dummy, &blocksize);
430 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
431 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks,
432 vsfsp->f_bsize, blocksize)));
433 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks -
434 vsfsp->f_bfree, vsfsp->f_bsize, blocksize)));
435 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail,
436 vsfsp->f_bsize, blocksize)));
437 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files -
439 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree));
442 /* Return the width in characters of the specified long. */
444 quadwidth(int64_t val)
449 /* Negative or zero values require one extra digit. */
462 * This code constitutes the pre-system call Berkeley df code for extracting
463 * information from filesystem superblocks.
470 #define sblock sb.iu_fs
475 ufs_df(char *file, struct maxwidths *mwp)
477 struct statfs statfsbuf;
478 struct statvfs statvfsbuf;
480 struct statvfs *vsfsp;
487 if ((rfd = open(file, O_RDONLY)) < 0) {
491 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
498 strcpy(sfsp->f_fstypename, "ufs");
500 sfsp->f_bsize = vsfsp->f_bsize = sblock.fs_fsize;
501 sfsp->f_iosize = vsfsp->f_frsize = sblock.fs_bsize;
502 sfsp->f_blocks = vsfsp->f_blocks = sblock.fs_dsize;
503 sfsp->f_bfree = vsfsp->f_bfree =
504 sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
505 sblock.fs_cstotal.cs_nffree;
506 sfsp->f_bavail = vsfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
507 sfsp->f_files = vsfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
508 sfsp->f_ffree = vsfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
509 sfsp->f_fsid.val[0] = 0;
510 sfsp->f_fsid.val[1] = 0;
511 if ((mntpt = getmntpt(file)) == NULL)
513 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
514 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
515 prtstat(sfsp, vsfsp, mwp);
521 bread(off_t off, void *buf, int cnt)
525 lseek(rfd, off, SEEK_SET);
526 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
527 /* Probably a dismounted disk if errno == EIO. */
529 fprintf(stderr, "\ndf: %lld: %s\n",
530 (long long)off, strerror(nr > 0 ? EIO : errno));
541 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
548 char *str, *strptr, **listptr;
549 int mib[3], maxvfsconf, cnt=0, i;
551 struct ovfsconf *ptr;
553 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
554 miblen=sizeof(maxvfsconf);
555 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
556 &maxvfsconf, &miblen, NULL, 0)) {
557 warnx("sysctl failed");
561 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
562 warnx("malloc failed");
566 for (ptr = getvfsent(); ptr; ptr = getvfsent())
567 if (ptr->vfc_flags & VFCF_NETWORK) {
568 listptr[cnt++] = strdup(ptr->vfc_name);
569 if (listptr[cnt-1] == NULL) {
570 warnx("malloc failed");
576 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
578 warnx("malloc failed");
583 *str = 'n'; *(str + 1) = 'o';
584 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
585 strncpy(strptr, listptr[i], 32);
586 strptr += strlen(listptr[i]);