/* * 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[] = "from: @(#)df.c 8.7 (Berkeley) 4/2/94";*/ static char rcsid[] = "$Id: df.c,v 1.13.2.1 1994/09/16 21:42:02 cgd Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include 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, kflag = 0, nflag, lflag; long blocksize, mntsize; struct statfs *mntbuf; struct ufs_args mdev; int main(argc, argv) int argc; char *argv[]; { struct stat stbuf; struct statfs statfsbuf; long width, maxwidth; int ch, i; char *mntpt; while ((ch = getopt(argc, argv, "ikln")) != EOF) switch (ch) { case 'i': iflag = 1; break; case 'k': blocksize = 1024; kflag = 1; break; case 'l': lflag = 1; break; case 'n': nflag = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; if (*argv && lflag) errx(1, "-l does not make sense with list of mount points"); mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT)); if (mntsize == 0) err(1, "retrieving information on mounted file systems"); maxwidth = 0; for (i = 0; i < mntsize; i++) { width = strlen(mntbuf[i].f_mntfromname); if (width > maxwidth) maxwidth = width; } if (!*argv) { for (i = 0; i < mntsize; i++) if (!lflag || mntbuf[i].f_flags & MNT_LOCAL) prtstat(&mntbuf[i], maxwidth); exit(0); } for (; *argv; argv++) { if (stat(*argv, &stbuf) < 0) { 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 i; for (i = 0; i < mntsize; i++) { if (!strcmp(mntbuf[i].f_mntfromname, name)) return (mntbuf[i].f_mntonname); } return (0); } /* * 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 int headerlen, timesthrough; static char *header; long used, availblks, inodes; if (maxwidth < 11) maxwidth = 11; if (++timesthrough == 1) { if (kflag) { 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"); } (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 #include #include 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 = 0; 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); strncpy(sfsp->f_fstypename, MOUNT_UFS, MFSNAMELEN); sfsp->f_fstypename[MFSNAMELEN] = '\0'; 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() { (void)fprintf(stderr, "usage: df [-ikln] [file | file_system ...]\n"); exit(1); }