/* $OpenBSD: df.c,v 1.49 2008/03/16 20:04:35 otto Exp $ */ /* $NetBSD: df.c,v 1.21.2.1 1995/11/01 00:06:11 jtc Exp $ */ /* * Copyright (c) 1980, 1990, 1993, 1994 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. 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) 1980, 1990, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94"; #else static char rcsid[] = "$OpenBSD: df.c,v 1.49 2008/03/16 20:04:35 otto Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <sys/stat.h> #include <sys/mount.h> #include <err.h> #include <errno.h> #include <fcntl.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <util.h> extern char *__progname; char *getmntpt(char *); int selected(const char *); void maketypelist(char *); long regetmntinfo(struct statfs **, long); void bsdprint(struct statfs *, long, int); void prtstat(struct statfs *, int, int, int); void posixprint(struct statfs *, long, int); int bread(int, off_t, void *, int); void usage(void); void prthumanval(long long); void prthuman(struct statfs *sfsp, unsigned long long); int raw_df(char *, struct statfs *); extern int ffs_df(int, char *, struct statfs *); extern int e2fs_df(int, char *, struct statfs *); int hflag, iflag, kflag, lflag, nflag, Pflag; char **typelist = NULL; int main(int argc, char *argv[]) { struct stat stbuf; struct statfs *mntbuf; long mntsize; int ch, i; int width, maxwidth; char *mntpt; while ((ch = getopt(argc, argv, "hiklnPt:")) != -1) switch (ch) { case 'h': hflag = 1; kflag = 0; break; case 'i': iflag = 1; break; case 'k': kflag = 1; hflag = 0; break; case 'l': lflag = 1; break; case 'n': nflag = 1; break; case 'P': Pflag = 1; break; case 't': if (typelist != NULL) errx(1, "only one -t option may be specified."); maketypelist(optarg); break; default: usage(); } argc -= optind; argv += optind; if ((iflag || hflag) && Pflag) { warnx("-h and -i are incompatible with -P"); usage(); } mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); if (mntsize == 0) err(1, "retrieving information on mounted file systems"); if (!*argv) { mntsize = regetmntinfo(&mntbuf, mntsize); } else { mntbuf = calloc(argc, sizeof(struct statfs)); if (mntbuf == NULL) err(1, NULL); mntsize = 0; for (; *argv; argv++) { if (stat(*argv, &stbuf) < 0) { if ((mntpt = getmntpt(*argv)) == 0) { warn("%s", *argv); continue; } } else if (S_ISCHR(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) { if (!raw_df(*argv, &mntbuf[mntsize])) ++mntsize; continue; } else mntpt = *argv; /* * Statfs does not take a `wait' flag, so we cannot * implement nflag here. */ if (!statfs(mntpt, &mntbuf[mntsize])) if (lflag && (mntbuf[mntsize].f_flags & MNT_LOCAL) == 0) warnx("%s is not a local file system", *argv); else if (!selected(mntbuf[mntsize].f_fstypename)) warnx("%s mounted as a %s file system", *argv, mntbuf[mntsize].f_fstypename); else ++mntsize; else warn("%s", *argv); } } if (mntsize) { maxwidth = 0; for (i = 0; i < mntsize; i++) { width = strlen(mntbuf[i].f_mntfromname); if (width > maxwidth) maxwidth = width; } if (maxwidth < 11) maxwidth = 11; if (Pflag) posixprint(mntbuf, mntsize, maxwidth); else bsdprint(mntbuf, mntsize, maxwidth); } exit(mntsize ? 0 : 1); } char * getmntpt(char *name) { long mntsize, i; struct statfs *mntbuf; mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); for (i = 0; i < mntsize; i++) { if (!strcmp(mntbuf[i].f_mntfromname, name)) return (mntbuf[i].f_mntonname); } return (0); } static enum { IN_LIST, NOT_IN_LIST } which; int selected(const char *type) { char **av; /* If no type specified, it's always selected. */ if (typelist == NULL) return (1); for (av = typelist; *av != NULL; ++av) if (!strncmp(type, *av, MFSNAMELEN)) return (which == IN_LIST ? 1 : 0); return (which == IN_LIST ? 0 : 1); } void maketypelist(char *fslist) { int i; char *nextcp, **av; if ((fslist == NULL) || (fslist[0] == '\0')) errx(1, "empty type list"); /* * XXX * Note: the syntax is "noxxx,yyy" for no xxx's and * no yyy's, not the more intuitive "noyyy,noyyy". */ if (fslist[0] == 'n' && fslist[1] == 'o') { fslist += 2; which = NOT_IN_LIST; } else which = IN_LIST; /* Count the number of types. */ for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')) != NULL; i++) ++nextcp; /* Build an array of that many types. */ if ((av = typelist = calloc(i + 1, sizeof(char *))) == NULL) err(1, NULL); av[0] = fslist; for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')) != NULL; i++) { *nextcp = '\0'; av[i] = ++nextcp; } /* Terminate the array. */ av[i] = NULL; } /* * Make a pass over the filesystem info in ``mntbuf'' filtering out * filesystem types not in ``fsmask'' and possibly re-stating to get * current (not cached) info. Returns the new count of valid statfs bufs. */ long regetmntinfo(struct statfs **mntbufp, long mntsize) { int i, j; struct statfs *mntbuf; if (!lflag && typelist == NULL) return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); mntbuf = *mntbufp; j = 0; for (i = 0; i < mntsize; i++) { if (lflag && (mntbuf[i].f_flags & MNT_LOCAL) == 0) continue; if (!selected(mntbuf[i].f_fstypename)) continue; if (nflag) mntbuf[j] = mntbuf[i]; else (void)statfs(mntbuf[i].f_mntonname, &mntbuf[j]); j++; } return (j); } /* * "human-readable" output: use 3 digits max.--put unit suffixes at * the end. Makes output compact and easy-to-read esp. on huge disks. * Code moved into libutil; this is now just a wrapper. */ void prthumanval(long long bytes) { char ret[FMT_SCALED_STRSIZE]; if (fmt_scaled(bytes, ret) == -1) { (void)printf(" %lld", bytes); return; } (void)printf(" %7s", ret); } void prthuman(struct statfs *sfsp, unsigned long long used) { prthumanval(sfsp->f_blocks * sfsp->f_bsize); prthumanval(used * sfsp->f_bsize); prthumanval(sfsp->f_bavail * sfsp->f_bsize); } /* * Convert statfs returned filesystem size into BLOCKSIZE units. * Attempts to avoid overflow for large filesystems. */ #define fsbtoblk(num, fsbs, bs) \ (((fsbs) != 0 && (fsbs) < (bs)) ? \ (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs))) /* * Print out status about a filesystem. */ void prtstat(struct statfs *sfsp, int maxwidth, int headerlen, int blocksize) { u_int64_t used, inodes; int64_t availblks; (void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname); used = sfsp->f_blocks - sfsp->f_bfree; availblks = sfsp->f_bavail + used; if (hflag) prthuman(sfsp, used); else (void)printf(" %*llu %9llu %9lld", headerlen, fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize), fsbtoblk(used, sfsp->f_bsize, blocksize), fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize)); (void)printf(" %5.0f%%", availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); if (iflag) { inodes = sfsp->f_files; used = inodes - sfsp->f_ffree; (void)printf(" %7llu %7llu %5.0f%% ", used, sfsp->f_ffree, inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0); } else (void)printf(" "); (void)printf(" %s\n", sfsp->f_mntonname); } /* * Print in traditional BSD format. */ void bsdprint(struct statfs *mntbuf, long mntsize, int maxwidth) { int i; char *header; int headerlen; long blocksize; /* Print the header line */ if (hflag) { header = " Size"; headerlen = strlen(header); (void)printf("%-*.*s %s Used Avail Capacity", maxwidth, maxwidth, "Filesystem", header); } else { if (kflag) { blocksize = 1024; header = "1K-blocks"; headerlen = strlen(header); } else header = getbsize(&headerlen, &blocksize); (void)printf("%-*.*s %s Used Avail Capacity", maxwidth, maxwidth, "Filesystem", header); } if (iflag) (void)printf(" iused ifree %%iused"); (void)printf(" Mounted on\n"); for (i = 0; i < mntsize; i++) prtstat(&mntbuf[i], maxwidth, headerlen, blocksize); return; } /* * Print in format defined by POSIX 1002.2, invoke with -P option. */ void posixprint(struct statfs *mntbuf, long mntsize, int maxwidth) { int i; int blocksize; char *blockstr; struct statfs *sfsp; long long used, avail; double percentused; if (kflag) { blocksize = 1024; blockstr = "1024-blocks"; } else { blocksize = 512; blockstr = " 512-blocks"; } (void)printf( "%-*.*s %s Used Available Capacity Mounted on\n", maxwidth, maxwidth, "Filesystem", blockstr); for (i = 0; i < mntsize; i++) { sfsp = &mntbuf[i]; used = sfsp->f_blocks - sfsp->f_bfree; avail = sfsp->f_bavail + used; if (avail == 0) percentused = 100.0; else percentused = (double)used / (double)avail * 100.0; (void) printf ("%-*.*s %*lld %10lld %11lld %5.0f%% %s\n", maxwidth, maxwidth, sfsp->f_mntfromname, (int)strlen(blockstr), fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize), fsbtoblk(used, sfsp->f_bsize, blocksize), fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize), percentused, sfsp->f_mntonname); } } int raw_df(char *file, struct statfs *sfsp) { int rfd, ret = -1; if ((rfd = open(file, O_RDONLY)) < 0) { warn("%s", file); return (-1); } if (ffs_df(rfd, file, sfsp) == 0) { ret = 0; } else if (e2fs_df(rfd, file, sfsp) == 0) { ret = 0; } close (rfd); return (ret); } int bread(int rfd, off_t off, void *buf, int cnt) { int nr; (void)lseek(rfd, off, SEEK_SET); if ((nr = read(rfd, buf, cnt)) != cnt) { /* Probably a dismounted disk if errno == EIO. */ if (errno != EIO) (void)fprintf(stderr, "\ndf: %qd: %s\n", off, strerror(nr > 0 ? EIO : errno)); return (0); } return (1); } void usage(void) { (void)fprintf(stderr, "usage: %s [-hiklnP] [-t type] [[file | file_system] ...]\n", __progname); exit(1); }