| 1 | /* |
| 2 | * Copyright (c) 1980 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | char copyright[] = |
| 20 | "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ |
| 21 | All rights reserved.\n"; |
| 22 | #endif /* not lint */ |
| 23 | |
| 24 | #ifndef lint |
| 25 | static char sccsid[] = "@(#)df.c 5.14 (Berkeley) %G%"; |
| 26 | #endif /* not lint */ |
| 27 | |
| 28 | /* |
| 29 | * df |
| 30 | */ |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <sys/mount.h> |
| 34 | #include <sys/file.h> |
| 35 | #include <stdio.h> |
| 36 | #include <strings.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | char *getmntpt(); |
| 40 | int iflag, kflag; |
| 41 | #ifdef COMPAT_43 |
| 42 | int oflag; |
| 43 | #endif /* COMPAT_43 */ |
| 44 | |
| 45 | main(argc, argv) |
| 46 | int argc; |
| 47 | char **argv; |
| 48 | { |
| 49 | extern int errno, optind; |
| 50 | int err, ch, i; |
| 51 | long mntsize, getmntinfo(); |
| 52 | char *mntpt, *mktemp(); |
| 53 | struct stat stbuf; |
| 54 | struct statfs statfsbuf, *mntbuf; |
| 55 | struct ufs_args mdev; |
| 56 | |
| 57 | while ((ch = getopt(argc, argv, "iko")) != EOF) |
| 58 | switch(ch) { |
| 59 | case 'i': |
| 60 | iflag = 1; |
| 61 | break; |
| 62 | case 'k': |
| 63 | kflag = 1; |
| 64 | break; |
| 65 | #ifdef COMPAT_43 |
| 66 | case 'o': |
| 67 | oflag = 1; |
| 68 | break; |
| 69 | #endif /* COMPAT_43 */ |
| 70 | case '?': |
| 71 | default: |
| 72 | fprintf(stderr, |
| 73 | "usage: df [-ik] [file | file_system ...]\n"); |
| 74 | exit(1); |
| 75 | } |
| 76 | argc -= optind; |
| 77 | argv += optind; |
| 78 | |
| 79 | printf("Filesystem %s used avail capacity", |
| 80 | kflag ? " kbytes" : "512-blks"); |
| 81 | if (iflag) |
| 82 | printf(" iused ifree %%iused"); |
| 83 | printf(" Mounted on\n"); |
| 84 | #ifdef COMPAT_43 |
| 85 | if (oflag) { |
| 86 | olddf(argv); |
| 87 | exit(0); |
| 88 | } |
| 89 | #endif /* COMPAT_43 */ |
| 90 | if (!*argv) { |
| 91 | mntsize = getmntinfo(&mntbuf); |
| 92 | for (i = 0; i < mntsize; i++) |
| 93 | prtstat(&mntbuf[i]); |
| 94 | exit(0); |
| 95 | } |
| 96 | for (; *argv; argv++) { |
| 97 | if (stat(*argv, &stbuf) < 0) { |
| 98 | err = errno; |
| 99 | if ((mntpt = getmntpt(*argv)) == 0) { |
| 100 | fprintf(stderr, "df: %s: %s\n", *argv, |
| 101 | strerror(err)); |
| 102 | continue; |
| 103 | } |
| 104 | } else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) { |
| 105 | if ((mntpt = getmntpt(*argv)) == 0) |
| 106 | mntpt = mktemp("/df.XXXXXX"); |
| 107 | mdev.fspec = *argv; |
| 108 | if (!mkdir(mntpt) && |
| 109 | !mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) && |
| 110 | !statfs(mntpt, &statfsbuf)) { |
| 111 | statfsbuf.f_mntonname[0] = '\0'; |
| 112 | prtstat(&statfsbuf); |
| 113 | } else |
| 114 | fprintf(stderr, "df: %s: %s\n", |
| 115 | *argv, strerror(errno)); |
| 116 | (void)unmount(mntpt, MNT_NOFORCE); |
| 117 | (void)rmdir(mntpt); |
| 118 | continue; |
| 119 | } else |
| 120 | mntpt = *argv; |
| 121 | if (statfs(mntpt, &statfsbuf) < 0) { |
| 122 | fprintf(stderr, |
| 123 | "df: %s: %s\n", mntpt, strerror(errno)); |
| 124 | continue; |
| 125 | } |
| 126 | prtstat(&statfsbuf); |
| 127 | } |
| 128 | exit(0); |
| 129 | } |
| 130 | |
| 131 | char * |
| 132 | getmntpt(name) |
| 133 | char *name; |
| 134 | { |
| 135 | long mntsize, i; |
| 136 | struct statfs *mntbuf; |
| 137 | |
| 138 | mntsize = getmntinfo(&mntbuf); |
| 139 | for (i = 0; i < mntsize; i++) { |
| 140 | if (!strcmp(mntbuf[i].f_mntfromname, name)) |
| 141 | return (mntbuf[i].f_mntonname); |
| 142 | } |
| 143 | return (0); |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Print out status about a filesystem. |
| 148 | */ |
| 149 | prtstat(sfsp) |
| 150 | register struct statfs *sfsp; |
| 151 | { |
| 152 | long used, availblks, inodes; |
| 153 | |
| 154 | printf("%-12.12s", sfsp->f_mntfromname); |
| 155 | used = sfsp->f_blocks - sfsp->f_bfree; |
| 156 | availblks = sfsp->f_bavail + used; |
| 157 | printf("%8ld%8ld%8ld", |
| 158 | sfsp->f_blocks * sfsp->f_fsize / (kflag ? 1024 : 512), |
| 159 | used * sfsp->f_fsize / (kflag ? 1024 : 512), |
| 160 | sfsp->f_bavail * sfsp->f_fsize / (kflag ? 1024 : 512)); |
| 161 | printf("%6.0f%%", |
| 162 | availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); |
| 163 | if (iflag) { |
| 164 | inodes = sfsp->f_files; |
| 165 | used = inodes - sfsp->f_ffree; |
| 166 | printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree, |
| 167 | inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0); |
| 168 | } else |
| 169 | printf(" "); |
| 170 | printf(" %s\n", sfsp->f_mntonname); |
| 171 | } |
| 172 | |
| 173 | #ifdef COMPAT_43 |
| 174 | /* |
| 175 | * This code constitutes the old df code for extracting |
| 176 | * information from filesystem superblocks. |
| 177 | */ |
| 178 | #include <ufs/fs.h> |
| 179 | #include <errno.h> |
| 180 | #include <fstab.h> |
| 181 | |
| 182 | char root[MAXPATHLEN]; |
| 183 | |
| 184 | union { |
| 185 | struct fs iu_fs; |
| 186 | char dummy[SBSIZE]; |
| 187 | } sb; |
| 188 | #define sblock sb.iu_fs |
| 189 | |
| 190 | int fi; |
| 191 | char *strcpy(); |
| 192 | |
| 193 | olddf(argv) |
| 194 | char *argv[]; |
| 195 | { |
| 196 | struct fstab *fsp; |
| 197 | |
| 198 | sync(); |
| 199 | if (!*argv) { |
| 200 | if (setfsent() == 0) |
| 201 | perror(_PATH_FSTAB), exit(1); |
| 202 | while (fsp = getfsent()) { |
| 203 | if (strcmp(fsp->fs_type, FSTAB_RW) && |
| 204 | strcmp(fsp->fs_type, FSTAB_RO) && |
| 205 | strcmp(fsp->fs_type, FSTAB_RQ)) |
| 206 | continue; |
| 207 | if (root[0] == 0) |
| 208 | (void) strcpy(root, fsp->fs_spec); |
| 209 | dfree(fsp->fs_spec, 1); |
| 210 | } |
| 211 | (void)endfsent(); |
| 212 | exit(0); |
| 213 | } |
| 214 | while (*argv) |
| 215 | dfree(*argv++, 0); |
| 216 | exit(0); |
| 217 | } |
| 218 | |
| 219 | dfree(file, infsent) |
| 220 | char *file; |
| 221 | int infsent; |
| 222 | { |
| 223 | extern int errno; |
| 224 | struct stat stbuf; |
| 225 | struct statfs statfsbuf; |
| 226 | register struct statfs *sfsp; |
| 227 | struct fstab *fsp; |
| 228 | char *mntpt; |
| 229 | |
| 230 | if (stat(file, &stbuf) == 0 && |
| 231 | (stbuf.st_mode&S_IFMT) != S_IFCHR && |
| 232 | (stbuf.st_mode&S_IFMT) != S_IFBLK) { |
| 233 | if (infsent) { |
| 234 | fprintf(stderr, "df: %s: screwy fstab entry\n", file); |
| 235 | return; |
| 236 | } |
| 237 | (void)setfsent(); |
| 238 | while (fsp = getfsent()) { |
| 239 | struct stat stb; |
| 240 | |
| 241 | if (stat(fsp->fs_spec, &stb) == 0 && |
| 242 | stb.st_rdev == stbuf.st_dev) { |
| 243 | file = fsp->fs_spec; |
| 244 | (void)endfsent(); |
| 245 | goto found; |
| 246 | } |
| 247 | } |
| 248 | (void)endfsent(); |
| 249 | fprintf(stderr, "df: %s: mounted on unknown device\n", file); |
| 250 | return; |
| 251 | } |
| 252 | found: |
| 253 | if ((fi = open(file, O_RDONLY)) < 0) { |
| 254 | fprintf(stderr, "df: %s: %s\n", file, strerror(errno)); |
| 255 | return; |
| 256 | } |
| 257 | if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) { |
| 258 | (void) close(fi); |
| 259 | return; |
| 260 | } |
| 261 | sfsp = &statfsbuf; |
| 262 | sfsp->f_type = MOUNT_UFS; |
| 263 | sfsp->f_flags = 0; |
| 264 | sfsp->f_fsize = sblock.fs_fsize; |
| 265 | sfsp->f_bsize = sblock.fs_bsize; |
| 266 | sfsp->f_blocks = sblock.fs_dsize; |
| 267 | sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag + |
| 268 | sblock.fs_cstotal.cs_nffree; |
| 269 | sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) - |
| 270 | (sblock.fs_dsize - sfsp->f_bfree); |
| 271 | if (sfsp->f_bavail < 0) |
| 272 | sfsp->f_bavail = 0; |
| 273 | sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg; |
| 274 | sfsp->f_ffree = sblock.fs_cstotal.cs_nifree; |
| 275 | sfsp->f_fsid.val[0] = 0; |
| 276 | sfsp->f_fsid.val[1] = 0; |
| 277 | if ((mntpt = getmntpt(file)) == 0) |
| 278 | mntpt = ""; |
| 279 | bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN); |
| 280 | bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN); |
| 281 | prtstat(sfsp); |
| 282 | (void) close(fi); |
| 283 | } |
| 284 | |
| 285 | long lseek(); |
| 286 | |
| 287 | bread(off, buf, cnt) |
| 288 | long off; |
| 289 | char *buf; |
| 290 | { |
| 291 | int n; |
| 292 | extern errno; |
| 293 | |
| 294 | (void) lseek(fi, off, SEEK_SET); |
| 295 | if ((n=read(fi, buf, cnt)) != cnt) { |
| 296 | /* probably a dismounted disk if errno == EIO */ |
| 297 | if (errno != EIO) { |
| 298 | printf("\nread error off = %ld\n", off); |
| 299 | printf("count = %d; errno = %d\n", n, errno); |
| 300 | } |
| 301 | return (0); |
| 302 | } |
| 303 | return (1); |
| 304 | } |
| 305 | #endif /* COMPAT_43 */ |