/* * 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. 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) 1980, 1990, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94"; #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 <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> /* XXX assumes MOUNT_MAXTYPE < 32 */ #define MT(m) (1 << (m)) /* fixed values */ #define MT_NONE (0) #define MT_ALL (MT(MOUNT_MAXTYPE+1)-1) /* subject to change */ #define MT_LOCAL \ (MT(MOUNT_UFS)|MT(MOUNT_MFS)|MT(MOUNT_LFS)|MT(MOUNT_MSDOS)|MT(MOUNT_CD9660)) #define MT_DEFAULT MT_ALL struct typetab { char *str; long types; } typetab[] = { "ufs", MT(MOUNT_UFS), "local", MT_LOCAL, "all", MT_ALL, "nfs", MT(MOUNT_NFS), "mfs", MT(MOUNT_MFS), "lfs", MT(MOUNT_LFS), "msdos", MT(MOUNT_MSDOS), "fdesc", MT(MOUNT_FDESC), "portal", MT(MOUNT_PORTAL), #if 0 /* return fsid of underlying FS */ "lofs", MT(MOUNT_LOFS), "null", MT(MOUNT_NULL), "umap", MT(MOUNT_UMAP), #endif "kernfs", MT(MOUNT_KERNFS), "procfs", MT(MOUNT_PROCFS), "afs", MT(MOUNT_AFS), "iso9660fs", MT(MOUNT_CD9660), "cdfs", MT(MOUNT_CD9660), "misc", MT(MOUNT_LOFS)|MT(MOUNT_FDESC)|MT(MOUNT_PORTAL)| MT(MOUNT_KERNFS)|MT(MOUNT_PROCFS), NULL, 0 }; long addtype __P((long, char *)); long regetmntinfo __P((struct statfs **, long, long)); int bread __P((off_t, void *, int)); char *getmntpt __P((char *)); void prtstat __P((struct statfs *, int)); void ufs_df __P((char *, int)); void usage __P((void)); int iflag, nflag, tflag, kflag; struct ufs_args mdev; int main(argc, argv) int argc; char *argv[]; { struct stat stbuf; struct statfs statfsbuf, *mntbuf; long fsmask, mntsize; int ch, err, i, maxwidth, width; char *mntpt; iflag = nflag = tflag = kflag = 0; while ((ch = getopt(argc, argv, "iknt:")) != EOF) switch (ch) { case 'i': iflag = 1; break; case 'k': kflag = 1; break; case 'n': nflag = 1; break; case 't': fsmask = addtype(fsmask, optarg); tflag = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); maxwidth = 0; for (i = 0; i < mntsize; i++) { width = strlen(mntbuf[i].f_mntfromname); if (width > maxwidth) maxwidth = width; } if (!*argv) { if (!tflag) fsmask = MT_DEFAULT; mntsize = regetmntinfo(&mntbuf, mntsize, fsmask); if (fsmask != MT_ALL) { maxwidth = 0; for (i = 0; i < mntsize; i++) { width = strlen(mntbuf[i].f_mntfromname); if (width > maxwidth) maxwidth = width; } } for (i = 0; i < mntsize; i++) prtstat(&mntbuf[i], maxwidth); exit(0); } for (; *argv; argv++) { if (stat(*argv, &stbuf) < 0) { err = errno; if ((mntpt = getmntpt(*argv)) == 0) { warn("%s", *argv); continue; } } else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) { ufs_df(*argv, maxwidth); continue; } else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) { if ((mntpt = getmntpt(*argv)) == 0) { mntpt = mktemp(strdup("/tmp/df.XXXXXX")); mdev.fspec = *argv; if (mkdir(mntpt, DEFFILEMODE) != 0) { warn("%s", mntpt); continue; } if (mount(MOUNT_UFS, mntpt, MNT_RDONLY, &mdev) != 0) { ufs_df(*argv, maxwidth); (void)rmdir(mntpt); continue; } else if (statfs(mntpt, &statfsbuf)) { statfsbuf.f_mntonname[0] = '\0'; prtstat(&statfsbuf, maxwidth); } else warn("%s", *argv); (void)unmount(mntpt, 0); (void)rmdir(mntpt); continue; } } else mntpt = *argv; /* * Statfs does not take a `wait' flag, so we cannot * implement nflag here. */ if (statfs(mntpt, &statfsbuf) < 0) { warn("%s", mntpt); continue; } if (argc == 1) maxwidth = strlen(statfsbuf.f_mntfromname) + 1; prtstat(&statfsbuf, maxwidth); } return (0); } char * getmntpt(name) 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); } long addtype(omask, str) long omask; char *str; { struct typetab *tp; /* * If it is one of our known types, add it to the current mask */ for (tp = typetab; tp->str; tp++) if (strcmp(str, tp->str) == 0) return (tp->types | (tflag ? omask : MT_NONE)); /* * See if it is the negation of one of the known values */ if (strlen(str) > 2 && str[0] == 'n' && str[1] == 'o') for (tp = typetab; tp->str; tp++) if (strcmp(str+2, tp->str) == 0) return (~tp->types & (tflag ? omask : MT_ALL)); errx(1, "unknown type `%s'", str); } /* * 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(mntbufp, mntsize, fsmask) struct statfs **mntbufp; long mntsize, fsmask; { int i, j; struct statfs *mntbuf; if (fsmask == MT_ALL) return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); mntbuf = *mntbufp; j = 0; for (i = 0; i < mntsize; i++) { if (fsmask & MT(mntbuf[i].f_type)) { if (!nflag) (void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]); else if (i != j) mntbuf[j] = mntbuf[i]; j++; } } return (j); } /* * 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(sfsp, maxwidth) struct statfs *sfsp; int maxwidth; { static long blocksize; static int headerlen, timesthrough; static char *header; long used, availblks, inodes; char *oldbsize = NULL; if (maxwidth < 11) maxwidth = 11; if (++timesthrough == 1) { if (kflag) { oldbsize = getenv("BLOCKSIZE"); putenv("BLOCKSIZE=1k"); } header = getbsize(&headerlen, &blocksize); if (oldbsize) putenv(oldbsize); (void)printf("%-*.*s %s Used Avail Capacity", maxwidth, maxwidth, "Filesystem", header); if (iflag) (void)printf(" iused ifree %%iused"); (void)printf(" Mounted on\n"); } (void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname); used = sfsp->f_blocks - sfsp->f_bfree; availblks = sfsp->f_bavail + used; (void)printf(" %*ld %8ld %8ld", 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(" %7ld %7ld %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); } /* * This code constitutes the pre-system call Berkeley df code for extracting * information from filesystem superblocks. */ #include <ufs/ffs/fs.h> #include <errno.h> #include <fstab.h> union { struct fs iu_fs; char dummy[SBSIZE]; } sb; #define sblock sb.iu_fs int rfd; void ufs_df(file, maxwidth) char *file; int maxwidth; { struct statfs statfsbuf; struct statfs *sfsp; char *mntpt; static int synced; if (synced++ == 0) sync(); if ((rfd = open(file, O_RDONLY)) < 0) { warn("%s", file); return; } if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) { (void)close(rfd); return; } sfsp = &statfsbuf; sfsp->f_type = MOUNT_UFS; sfsp->f_flags = 0; sfsp->f_bsize = sblock.fs_fsize; sfsp->f_iosize = sblock.fs_bsize; sfsp->f_blocks = sblock.fs_dsize; sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag + sblock.fs_cstotal.cs_nffree; sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) - (sblock.fs_dsize - sfsp->f_bfree); if (sfsp->f_bavail < 0) sfsp->f_bavail = 0; sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg; sfsp->f_ffree = sblock.fs_cstotal.cs_nifree; sfsp->f_fsid.val[0] = 0; sfsp->f_fsid.val[1] = 0; if ((mntpt = getmntpt(file)) == 0) mntpt = ""; memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN); memmove(&sfsp->f_mntfromname[0], file, MNAMELEN); prtstat(sfsp, maxwidth); (void)close(rfd); } int bread(off, buf, cnt) 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() { fprintf(stderr, "usage: df [-ikn] [-t fstype] [file | file_system ...]\n"); exit(1); }