1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
22 /* All Rights Reserved */
23
24
25 /*
26 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
27 */
28
29 /*
30 * Copyright 2016 Jason King
31 * Copyright 2019 Nexenta Systems, Inc. All rights reserved.
32 */
33
34 #include <dlfcn.h>
35 #include <stdio.h>
36 #include <stdarg.h>
37 #include <string.h>
38 #include <locale.h>
39 #include <libintl.h>
40 #include <stdlib.h>
41 #include <ftw.h>
42 #include <errno.h>
43 #include <sys/types.h>
44 #include <unistd.h>
45 #include <sys/statvfs.h>
46 #include <sys/stat.h>
47 #include <sys/param.h>
48 #include <sys/mnttab.h>
49 #include <sys/mntent.h>
50 #include <sys/vfstab.h>
51 #include <sys/wait.h>
52 #include <sys/mkdev.h>
53 #include <sys/int_limits.h>
54 #include <sys/zone.h>
55 #include <sys/debug.h>
56 #include <libzfs.h>
57 #include <libcmdutils.h>
58
59 #include "fslib.h"
60
61 extern char *default_fstype(char *);
62
63 /*
64 * General notice:
65 * String pointers in this code may point to statically allocated memory
66 * or dynamically allocated memory. Furthermore, a dynamically allocated
67 * string may be pointed to by more than one pointer. This does not pose
68 * a problem because malloc'ed memory is never free'd (so we don't need
69 * to remember which pointers point to malloc'ed memory).
70 */
71
72 /*
73 * TRANSLATION_NOTE
74 * Only strings passed as arguments to the TRANSLATE macro need to
75 * be translated.
76 */
77
78 #ifndef MNTTYPE_LOFS
79 #define MNTTYPE_LOFS "lofs"
80 #endif
81
82 #define EQ(s1, s2) (strcmp(s1, s2) == 0)
83 #define NEW(type) xmalloc(sizeof (type))
84 #define CLEAR(var) (void) memset(&(var), 0, sizeof (var))
85 #define MAX(a, b) ((a) > (b) ? (a) : (b))
86 #define MAX3(a, b, c) MAX(a, MAX(b, c))
87 #define TRANSLATE(s) new_string(gettext(s))
88
89 #define MAX_OPTIONS 36
90 #define N_FSTYPES 20
91 #define MOUNT_TABLE_ENTRIES 40 /* initial allocation */
92 #define MSGBUF_SIZE 1024
93 #define LINEBUF_SIZE 256 /* either input or output lines */
94
95 #define BLOCK_SIZE 512 /* when reporting in terms of blocks */
96
97 #define DEVNM_CMD "devnm"
98 #define FS_LIBPATH "/usr/lib/fs/"
99 #define MOUNT_TAB "/etc/mnttab"
100 #define VFS_TAB "/etc/vfstab"
101 #define REMOTE_FS "/etc/dfs/fstypes"
102
103 #define NUL '\0'
104 #define FALSE 0
105 #define TRUE 1
106
107 /*
108 * Formatting constants
109 */
110 #define IBCS2_FILESYSTEM_WIDTH 15 /* Truncate to match ISC/SCO */
111 #define IBCS2_MOUNT_POINT_WIDTH 10 /* Truncate to match ISC/SCO */
112 #define FILESYSTEM_WIDTH 20
113 #define MOUNT_POINT_WIDTH 19
114 #define SPECIAL_DEVICE_WIDTH 18
115 #define FSTYPE_WIDTH 8
116 #define BLOCK_WIDTH 8
117 #define NFILES_WIDTH 8
118 #define KBYTE_WIDTH 11
119 #define AVAILABLE_WIDTH 10
120 #define SCALED_WIDTH 6
121 #define CAPACITY_WIDTH 9
122 #define BSIZE_WIDTH 6
123 #define FRAGSIZE_WIDTH 7
124 #define FSID_WIDTH 7
125 #define FLAG_WIDTH 8
126 #define NAMELEN_WIDTH 7
127 #define MNT_SPEC_WIDTH MOUNT_POINT_WIDTH + SPECIAL_DEVICE_WIDTH + 2
128
129 /*
130 * Flags for the errmsg() function
131 */
132 #define ERR_NOFLAGS 0x0
133 #define ERR_NONAME 0x1 /* don't include the program name */
134 /* as a prefix */
135 #define ERR_FATAL 0x2 /* call exit after printing the */
136 /* message */
137 #define ERR_PERROR 0x4 /* append an errno explanation to */
138 /* the message */
139 #define ERR_USAGE 0x8 /* print the usage line after the */
140 /* message */
141
142 #define NUMBER_WIDTH 40
143 CTASSERT(NUMBER_WIDTH >= NN_NUMBUF_SZ);
144
145 /*
146 * A numbuf_t is used when converting a number to a string representation
147 */
148 typedef char numbuf_t[ NUMBER_WIDTH ];
149
150 /*
151 * We use bool_int instead of int to make clear which variables are
152 * supposed to be boolean
153 */
154 typedef int bool_int;
155
156 struct mtab_entry {
157 bool_int mte_dev_is_valid;
158 dev_t mte_dev;
159 bool_int mte_ignore; /* the "ignore" option was set */
160 struct extmnttab *mte_mount;
161 };
162
163
164 struct df_request {
165 bool_int dfr_valid;
166 char *dfr_cmd_arg; /* what the user specified */
167 struct mtab_entry *dfr_mte;
168 char *dfr_fstype;
169 int dfr_index; /* to make qsort stable */
170 };
171
172 #define DFR_MOUNT_POINT(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_mountp
173 #define DFR_SPECIAL(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_special
174 #define DFR_FSTYPE(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_fstype
175 #define DFR_ISMOUNTEDFS(dfrp) ((dfrp)->dfr_mte != NULL)
176
177 #define DFRP(p) ((struct df_request *)(p))
178
179 typedef void (*output_func)(struct df_request *, struct statvfs64 *);
180
181 struct df_output {
182 output_func dfo_func; /* function that will do the output */
183 int dfo_flags;
184 };
185
186 /*
187 * Output flags
188 */
189 #define DFO_NOFLAGS 0x0
190 #define DFO_HEADER 0x1 /* output preceded by header */
191 #define DFO_STATVFS 0x2 /* must do a statvfs64(2) */
192
193
194 static char *program_name;
195 static char df_options[MAX_OPTIONS] = "-";
196 static size_t df_options_len = 1;
197 static char *o_option_arg; /* arg to the -o option */
198 static char *FSType;
199 static char *remote_fstypes[N_FSTYPES+1]; /* allocate an extra one */
200 /* to use as a terminator */
201
202 /*
203 * The following three variables support an in-memory copy of the mount table
204 * to speedup searches.
205 */
206 static struct mtab_entry *mount_table; /* array of mtab_entry's */
207 static size_t mount_table_entries;
208 static size_t mount_table_allocated_entries;
209
210 static bool_int F_option;
211 static bool_int V_option;
212 static bool_int P_option; /* Added for XCU4 compliance */
213 static bool_int Z_option;
214 static bool_int v_option;
215 static bool_int a_option;
216 static bool_int b_option;
217 static bool_int e_option;
218 static bool_int g_option;
219 static bool_int h_option;
220 static bool_int k_option;
221 static bool_int l_option;
222 static bool_int m_option;
223 static bool_int n_option;
224 static bool_int t_option;
225 static bool_int o_option;
226
227 static bool_int tty_output;
228 static bool_int use_scaling;
229
230 static void usage(void);
231 static void do_devnm(int, char **);
232 static void do_df(int, char **) __NORETURN;
233 static void parse_options(int, char **);
234 static char *basename(char *);
235
236 static libzfs_handle_t *(*_libzfs_init)(void);
237 static zfs_handle_t *(*_zfs_open)(libzfs_handle_t *, const char *, int);
238 static void (*_zfs_close)(zfs_handle_t *);
239 static uint64_t (*_zfs_prop_get_int)(zfs_handle_t *, zfs_prop_t);
240 static libzfs_handle_t *g_zfs;
241
242 /*
243 * Dynamically check for libzfs, in case the user hasn't installed the SUNWzfs
244 * packages. A basic utility such as df shouldn't depend on optional
245 * filesystems.
246 */
247 static boolean_t
load_libzfs(void)248 load_libzfs(void)
249 {
250 void *hdl;
251
252 if (_libzfs_init != NULL)
253 return (g_zfs != NULL);
254
255 if ((hdl = dlopen("libzfs.so", RTLD_LAZY)) != NULL) {
256 _libzfs_init = (libzfs_handle_t *(*)(void))dlsym(hdl,
257 "libzfs_init");
258 _zfs_open = (zfs_handle_t *(*)())dlsym(hdl, "zfs_open");
259 _zfs_close = (void (*)())dlsym(hdl, "zfs_close");
260 _zfs_prop_get_int = (uint64_t (*)())
261 dlsym(hdl, "zfs_prop_get_int");
262
263 if (_libzfs_init != NULL) {
264 assert(_zfs_open != NULL);
265 assert(_zfs_close != NULL);
266 assert(_zfs_prop_get_int != NULL);
267
268 g_zfs = _libzfs_init();
269 }
270 }
271
272 return (g_zfs != NULL);
273 }
274
275 int
main(int argc,char * argv[])276 main(int argc, char *argv[])
277 {
278 (void) setlocale(LC_ALL, "");
279
280 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
281 #define TEXT_DOMAIN "SYS_TEST"
282 #endif
283 (void) textdomain(TEXT_DOMAIN);
284
285 program_name = basename(argv[0]);
286
287 if (EQ(program_name, DEVNM_CMD))
288 do_devnm(argc, argv);
289
290 parse_options(argc, argv);
291
292 /*
293 * The k_option implies SunOS 4.x compatibility: when the special
294 * device name is too long the line will be split except when the
295 * output has been redirected.
296 * This is also valid for the -h option.
297 */
298
299 if (use_scaling || k_option || P_option || v_option)
300 tty_output = isatty(1);
301
302 do_df(argc - optind, &argv[optind]);
303 /* NOTREACHED */
304 }
305
306
307 /*
308 * Prints an error message to stderr.
309 */
310 /* VARARGS2 */
311 static void
errmsg(int flags,char * fmt,...)312 errmsg(int flags, char *fmt, ...)
313 {
314 char buf[MSGBUF_SIZE];
315 va_list ap;
316 int cc;
317 int offset;
318
319 if (flags & ERR_NONAME)
320 offset = 0;
321 else
322 offset = sprintf(buf, "%s: ", program_name);
323
324 va_start(ap, fmt);
325 cc = vsprintf(&buf[offset], gettext(fmt), ap);
326 offset += cc;
327 va_end(ap);
328
329 if (flags & ERR_PERROR) {
330 if (buf[offset-1] != ' ')
331 (void) strcat(buf, " ");
332 (void) strcat(buf, strerror(errno));
333 }
334 (void) fprintf(stderr, "%s\n", buf);
335 if (flags & ERR_USAGE)
336 usage();
337 if (flags & ERR_FATAL)
338 exit(1);
339 }
340
341
342 static void
usage(void)343 usage(void)
344 {
345 errmsg(ERR_NONAME,
346 "Usage: %s [-F FSType] [-abeghklmntPVvZ]"
347 " [-o FSType-specific_options]"
348 " [directory | block_device | resource]", program_name);
349 exit(1);
350 /* NOTREACHED */
351 }
352
353
354 static char *
new_string(char * s)355 new_string(char *s)
356 {
357 char *p = NULL;
358
359 if (s) {
360 p = strdup(s);
361 if (p)
362 return (p);
363 errmsg(ERR_FATAL, "out of memory");
364 /* NOTREACHED */
365 }
366 return (p);
367 }
368
369
370 /*
371 * Allocate memory using malloc but terminate if the allocation fails
372 */
373 static void *
xmalloc(size_t size)374 xmalloc(size_t size)
375 {
376 void *p = malloc(size);
377
378 if (p)
379 return (p);
380 errmsg(ERR_FATAL, "out of memory");
381 /* NOTREACHED */
382 return (NULL);
383 }
384
385
386 /*
387 * Allocate memory using realloc but terminate if the allocation fails
388 */
389 static void *
xrealloc(void * ptr,size_t size)390 xrealloc(void *ptr, size_t size)
391 {
392 void *p = realloc(ptr, size);
393
394 if (p)
395 return (p);
396 errmsg(ERR_FATAL, "out of memory");
397 /* NOTREACHED */
398 return (NULL);
399 }
400
401
402 /*
403 * fopen the specified file for reading but terminate if the fopen fails
404 */
405 static FILE *
xfopen(char * file)406 xfopen(char *file)
407 {
408 FILE *fp = fopen(file, "r");
409
410 if (fp == NULL)
411 errmsg(ERR_FATAL + ERR_PERROR, "failed to open %s:", file);
412 return (fp);
413 }
414
415
416 /*
417 * Read remote file system types from REMOTE_FS into the
418 * remote_fstypes array.
419 */
420 static void
init_remote_fs(void)421 init_remote_fs(void)
422 {
423 FILE *fp;
424 char line_buf[LINEBUF_SIZE];
425 size_t fstype_index = 0;
426
427 if ((fp = fopen(REMOTE_FS, "r")) == NULL) {
428 errmsg(ERR_NOFLAGS,
429 "Warning: can't open %s, ignored", REMOTE_FS);
430 return;
431 }
432
433 while (fgets(line_buf, sizeof (line_buf), fp) != NULL) {
434 char buf[LINEBUF_SIZE];
435
436 (void) sscanf(line_buf, "%s", buf);
437 remote_fstypes[fstype_index++] = new_string(buf);
438
439 if (fstype_index == N_FSTYPES)
440 break;
441 }
442 (void) fclose(fp);
443 }
444
445
446 /*
447 * Returns TRUE if fstype is a remote file system type;
448 * otherwise, returns FALSE.
449 */
450 static int
is_remote_fs(char * fstype)451 is_remote_fs(char *fstype)
452 {
453 char **p;
454 static bool_int remote_fs_initialized;
455
456 if (! remote_fs_initialized) {
457 init_remote_fs();
458 remote_fs_initialized = TRUE;
459 }
460
461 for (p = remote_fstypes; *p; p++)
462 if (EQ(fstype, *p))
463 return (TRUE);
464 return (FALSE);
465 }
466
467
468 static char *
basename(char * s)469 basename(char *s)
470 {
471 char *p = strrchr(s, '/');
472
473 return (p ? p+1 : s);
474 }
475
476
477 /*
478 * Create a new "struct extmnttab" and make sure that its fields point
479 * to malloc'ed memory
480 */
481 static struct extmnttab *
mntdup(struct extmnttab * old)482 mntdup(struct extmnttab *old)
483 {
484 struct extmnttab *new = NEW(struct extmnttab);
485
486 new->mnt_special = new_string(old->mnt_special);
487 new->mnt_mountp = new_string(old->mnt_mountp);
488 new->mnt_fstype = new_string(old->mnt_fstype);
489 new->mnt_mntopts = new_string(old->mnt_mntopts);
490 new->mnt_time = new_string(old->mnt_time);
491 new->mnt_major = old->mnt_major;
492 new->mnt_minor = old->mnt_minor;
493 return (new);
494 }
495
496
497 static void
mtab_error(char * mtab_file,int status)498 mtab_error(char *mtab_file, int status)
499 {
500 if (status == MNT_TOOLONG)
501 errmsg(ERR_NOFLAGS, "a line in %s exceeds %d characters",
502 mtab_file, MNT_LINE_MAX);
503 else if (status == MNT_TOOMANY)
504 errmsg(ERR_NOFLAGS,
505 "a line in %s has too many fields", mtab_file);
506 else if (status == MNT_TOOFEW)
507 errmsg(ERR_NOFLAGS,
508 "a line in %s has too few fields", mtab_file);
509 else
510 errmsg(ERR_NOFLAGS,
511 "error while reading %s: %d", mtab_file, status);
512 exit(1);
513 /* NOTREACHED */
514 }
515
516
517 /*
518 * Read the mount table from the specified file.
519 * We keep the table in memory for faster lookups.
520 */
521 static void
mtab_read_file(void)522 mtab_read_file(void)
523 {
524 char *mtab_file = MOUNT_TAB;
525 FILE *fp;
526 struct extmnttab mtab;
527 int status;
528
529 fp = xfopen(mtab_file);
530
531 resetmnttab(fp);
532 mount_table_allocated_entries = MOUNT_TABLE_ENTRIES;
533 mount_table_entries = 0;
534 mount_table = xmalloc(
535 mount_table_allocated_entries * sizeof (struct mtab_entry));
536
537 while ((status = getextmntent(fp, &mtab, sizeof (struct extmnttab)))
538 == 0) {
539 struct mtab_entry *mtep;
540
541 if (mount_table_entries == mount_table_allocated_entries) {
542 mount_table_allocated_entries += MOUNT_TABLE_ENTRIES;
543 mount_table = xrealloc(mount_table,
544 mount_table_allocated_entries *
545 sizeof (struct mtab_entry));
546 }
547 mtep = &mount_table[mount_table_entries++];
548 mtep->mte_mount = mntdup(&mtab);
549 mtep->mte_dev_is_valid = FALSE;
550 mtep->mte_ignore = (hasmntopt((struct mnttab *)&mtab,
551 MNTOPT_IGNORE) != NULL);
552 }
553
554 (void) fclose(fp);
555
556 if (status == -1) /* reached EOF */
557 return;
558 mtab_error(mtab_file, status);
559 /* NOTREACHED */
560 }
561
562
563 /*
564 * We use this macro when we want to record the option for the purpose of
565 * passing it to the FS-specific df
566 */
567 #define SET_OPTION(opt) opt##_option = TRUE, \
568 df_options[df_options_len++] = arg
569
570 static void
parse_options(int argc,char * argv[])571 parse_options(int argc, char *argv[])
572 {
573 int arg;
574
575 opterr = 0; /* getopt shouldn't complain about unknown options */
576
577 while ((arg = getopt(argc, argv, "F:o:abehkVtgnlmPvZ")) != EOF) {
578 if (arg == 'F') {
579 if (F_option)
580 errmsg(ERR_FATAL + ERR_USAGE,
581 "more than one FSType specified");
582 F_option = 1;
583 FSType = optarg;
584 } else if (arg == 'V' && ! V_option) {
585 V_option = TRUE;
586 } else if (arg == 'v' && ! v_option) {
587 v_option = TRUE;
588 } else if (arg == 'P' && ! P_option) {
589 SET_OPTION(P);
590 } else if (arg == 'a' && ! a_option) {
591 SET_OPTION(a);
592 } else if (arg == 'b' && ! b_option) {
593 SET_OPTION(b);
594 } else if (arg == 'e' && ! e_option) {
595 SET_OPTION(e);
596 } else if (arg == 'g' && ! g_option) {
597 SET_OPTION(g);
598 } else if (arg == 'h') {
599 use_scaling = TRUE;
600 } else if (arg == 'k' && ! k_option) {
601 SET_OPTION(k);
602 } else if (arg == 'l' && ! l_option) {
603 SET_OPTION(l);
604 } else if (arg == 'm' && ! m_option) {
605 SET_OPTION(m);
606 } else if (arg == 'n' && ! n_option) {
607 SET_OPTION(n);
608 } else if (arg == 't' && ! t_option) {
609 SET_OPTION(t);
610 } else if (arg == 'o') {
611 if (o_option)
612 errmsg(ERR_FATAL + ERR_USAGE,
613 "the -o option can only be specified once");
614 o_option = TRUE;
615 o_option_arg = optarg;
616 } else if (arg == 'Z') {
617 SET_OPTION(Z);
618 } else if (arg == '?') {
619 errmsg(ERR_USAGE, "unknown option: %c", optopt);
620 }
621 }
622
623 /*
624 * Option sanity checks
625 */
626 if (g_option && o_option)
627 errmsg(ERR_FATAL, "-o and -g options are incompatible");
628 if (l_option && o_option)
629 errmsg(ERR_FATAL, "-o and -l options are incompatible");
630 if (n_option && o_option)
631 errmsg(ERR_FATAL, "-o and -n options are incompatible");
632 if (use_scaling && o_option)
633 errmsg(ERR_FATAL, "-o and -h options are incompatible");
634 }
635
636
637
638 /*
639 * Check if the user-specified argument is a resource name.
640 * A resource name is whatever is placed in the mnt_special field of
641 * struct mnttab. In the case of NFS, a resource name has the form
642 * hostname:pathname
643 * We try to find an exact match between the user-specified argument
644 * and the mnt_special field of a mount table entry.
645 * We also use the heuristic of removing the basename from the user-specified
646 * argument and repeating the test until we get a match. This works
647 * fine for NFS but may fail for other remote file system types. However,
648 * it is guaranteed that the function will not fail if the user specifies
649 * the exact resource name.
650 * If successful, this function sets the 'dfr_mte' field of '*dfrp'
651 */
652 static void
resource_mount_entry(struct df_request * dfrp)653 resource_mount_entry(struct df_request *dfrp)
654 {
655 char *name;
656
657 /*
658 * We need our own copy since we will modify the string
659 */
660 name = new_string(dfrp->dfr_cmd_arg);
661
662 for (;;) {
663 char *p;
664 int i;
665
666 /*
667 * Compare against all known mount points.
668 * We start from the most recent mount, which is at the
669 * end of the array.
670 */
671 for (i = mount_table_entries - 1; i >= 0; i--) {
672 struct mtab_entry *mtep = &mount_table[i];
673
674 if (EQ(name, mtep->mte_mount->mnt_special)) {
675 dfrp->dfr_mte = mtep;
676 break;
677 }
678 }
679
680 /*
681 * Remove the last component of the pathname.
682 * If there is no such component, this is not a resource name.
683 */
684 p = strrchr(name, '/');
685 if (p == NULL)
686 break;
687 *p = NUL;
688 }
689 }
690
691
692
693 /*
694 * Try to match the command line argument which is a block special device
695 * with the special device of one of the mounted file systems.
696 * If one is found, set the appropriate field of 'dfrp' to the mount
697 * table entry.
698 */
699 static void
bdev_mount_entry(struct df_request * dfrp)700 bdev_mount_entry(struct df_request *dfrp)
701 {
702 int i;
703 char *special = dfrp->dfr_cmd_arg;
704
705 /*
706 * Compare against all known mount points.
707 * We start from the most recent mount, which is at the
708 * end of the array.
709 */
710 for (i = mount_table_entries - 1; i >= 0; i--) {
711 struct mtab_entry *mtep = &mount_table[i];
712
713 if (EQ(special, mtep->mte_mount->mnt_special)) {
714 dfrp->dfr_mte = mtep;
715 break;
716 }
717 }
718 }
719
720 static struct mtab_entry *
devid_matches(int i,dev_t devno)721 devid_matches(int i, dev_t devno)
722 {
723 struct mtab_entry *mtep = &mount_table[i];
724 struct extmnttab *mtp = mtep->mte_mount;
725 /* int len = strlen(mtp->mnt_mountp); */
726
727 if (EQ(mtp->mnt_fstype, MNTTYPE_SWAP))
728 return (NULL);
729 /*
730 * check if device numbers match. If there is a cached device number
731 * in the mtab_entry, use it, otherwise get the device number
732 * either from the mnttab entry or by stat'ing the mount point.
733 */
734 if (! mtep->mte_dev_is_valid) {
735 struct stat64 st;
736 dev_t dev = NODEV;
737
738 dev = makedev(mtp->mnt_major, mtp->mnt_minor);
739 if (dev == 0)
740 dev = NODEV;
741 if (dev == NODEV) {
742 if (stat64(mtp->mnt_mountp, &st) == -1) {
743 return (NULL);
744 } else {
745 dev = st.st_dev;
746 }
747 }
748 mtep->mte_dev = dev;
749 mtep->mte_dev_is_valid = TRUE;
750 }
751 if (mtep->mte_dev == devno) {
752 return (mtep);
753 }
754 return (NULL);
755 }
756
757 /*
758 * Find the mount point under which the user-specified path resides
759 * and set the 'dfr_mte' field of '*dfrp' to point to the mount table entry.
760 */
761 static void
path_mount_entry(struct df_request * dfrp,dev_t devno)762 path_mount_entry(struct df_request *dfrp, dev_t devno)
763 {
764 char dirpath[MAXPATHLEN];
765 char *dir = dfrp->dfr_cmd_arg;
766 struct mtab_entry *match, *tmatch;
767 int i;
768
769 /*
770 * Expand the given path to get a canonical version (i.e. an absolute
771 * path without symbolic links).
772 */
773 if (realpath(dir, dirpath) == NULL) {
774 errmsg(ERR_PERROR, "cannot canonicalize %s:", dir);
775 return;
776 }
777 /*
778 * If the mnt point is lofs, search from the top of entries from
779 * /etc/mnttab and return the entry that best matches the pathname.
780 * For non-lofs mount points, return the first entry from the bottom
781 * of the entries in /etc/mnttab that matches on the devid field
782 */
783 match = NULL;
784 if (dfrp->dfr_fstype && EQ(dfrp->dfr_fstype, MNTTYPE_LOFS)) {
785 struct extmnttab *entryp;
786 char *path, *mountp;
787 char p, m;
788 int score;
789 int best_score = 0;
790 int best_index = -1;
791
792 for (i = 0; i < mount_table_entries; i++) {
793 entryp = mount_table[i].mte_mount;
794
795 if (!EQ(entryp->mnt_fstype, MNTTYPE_LOFS))
796 continue;
797
798 path = dirpath;
799 mountp = entryp->mnt_mountp;
800 score = 0;
801 /*
802 * Count the number of matching characters
803 * until either path or mountpoint is exhausted
804 */
805 while ((p = *path++) == (m = *mountp++)) {
806 score++;
807
808 if (p == '\0' || m == '\0')
809 break;
810 }
811
812 /* Both exhausted so we have a match */
813 if (p == '\0' && m == '\0') {
814 best_index = i;
815 break;
816 }
817
818 /*
819 * We have exhausted the mountpoint and the current
820 * character in the path is a '/' hence the full path
821 * traverses this mountpoint.
822 * Record this as the best candidate so far.
823 */
824 if (p == '/' && m == '\0') {
825 if (score > best_score) {
826 best_index = i;
827 best_score = score;
828 }
829 }
830 }
831
832 if (best_index > -1)
833 match = &mount_table[best_index];
834 } else {
835 for (i = mount_table_entries - 1; i >= 0; i--) {
836 if (tmatch = devid_matches(i, devno)) {
837 /*
838 * If executing in a zone, there might be lofs
839 * mounts for which the real mount point is
840 * invisible; accept the "best fit" for this
841 * devid.
842 */
843 match = tmatch;
844 if (!EQ(match->mte_mount->mnt_fstype,
845 MNTTYPE_LOFS)) {
846 break;
847 }
848 }
849 }
850 }
851 if (! match) {
852 errmsg(ERR_NOFLAGS,
853 "Could not find mount point for %s", dir);
854 return;
855 }
856 dfrp->dfr_mte = match;
857 }
858
859 /*
860 * Execute a single FS-specific df command for all given requests
861 * Return 0 if successful, 1 otherwise.
862 */
863 static int
run_fs_specific_df(struct df_request request_list[],int entries)864 run_fs_specific_df(struct df_request request_list[], int entries)
865 {
866 int i;
867 int argv_index;
868 char **argv;
869 size_t size;
870 pid_t pid;
871 int status;
872 char cmd_path[MAXPATHLEN];
873 char *fstype;
874
875 if (entries == 0)
876 return (0);
877
878 fstype = request_list[0].dfr_fstype;
879
880 if (F_option && ! EQ(FSType, fstype))
881 return (0);
882
883 (void) sprintf(cmd_path, "%s%s/df", FS_LIBPATH, fstype);
884 /*
885 * Argv entries:
886 * 1 for the path
887 * 2 for -o <options>
888 * 1 for the generic options that we propagate
889 * 1 for the terminating NULL pointer
890 * n for the number of user-specified arguments
891 */
892 size = (5 + entries) * sizeof (char *);
893 argv = xmalloc(size);
894 (void) memset(argv, 0, size);
895
896 argv[0] = cmd_path;
897 argv_index = 1;
898 if (o_option) {
899 argv[argv_index++] = "-o";
900 argv[argv_index++] = o_option_arg;
901 }
902
903 /*
904 * Check if we need to propagate any generic options
905 */
906 if (df_options_len > 1)
907 argv[argv_index++] = df_options;
908
909 /*
910 * If there is a user-specified path, we pass that to the
911 * FS-specific df. Otherwise, we are guaranteed to have a mount
912 * point, since a request without a user path implies that
913 * we are reporting only on mounted file systems.
914 */
915 for (i = 0; i < entries; i++) {
916 struct df_request *dfrp = &request_list[i];
917
918 argv[argv_index++] = (dfrp->dfr_cmd_arg == NULL)
919 ? DFR_MOUNT_POINT(dfrp)
920 : dfrp->dfr_cmd_arg;
921 }
922
923 if (V_option) {
924 for (i = 0; i < argv_index-1; i++)
925 (void) printf("%s ", argv[i]);
926 (void) printf("%s\n", argv[i]);
927 return (0);
928 }
929
930 pid = fork();
931
932 if (pid == -1) {
933 errmsg(ERR_PERROR, "cannot fork process:");
934 return (1);
935 } else if (pid == 0) {
936 (void) execv(cmd_path, argv);
937 if (errno == ENOENT)
938 errmsg(ERR_NOFLAGS,
939 "operation not applicable for FSType %s",
940 fstype);
941 else
942 errmsg(ERR_PERROR, "cannot execute %s:", cmd_path);
943 exit(2);
944 }
945
946 /*
947 * Reap the child
948 */
949 for (;;) {
950 pid_t wpid = waitpid(pid, &status, 0);
951
952 if (wpid == -1)
953 if (errno == EINTR)
954 continue;
955 else {
956 errmsg(ERR_PERROR, "waitpid error:");
957 return (1);
958 }
959 else
960 break;
961 }
962
963 return ((WIFEXITED(status) && WEXITSTATUS(status) == 0) ? 0 : 1);
964 }
965
966
967
968 /*
969 * Remove from the request list all requests that do not apply.
970 * Notice that the subsequent processing of the requests depends on
971 * the sanity checking performed by this function.
972 */
973 static int
prune_list(struct df_request request_list[],size_t n_requests,size_t * valid_requests)974 prune_list(struct df_request request_list[],
975 size_t n_requests, size_t *valid_requests)
976 {
977 size_t i;
978 size_t n_valid = 0;
979 int errors = 0;
980
981 for (i = 0; i < n_requests; i++) {
982 struct df_request *dfrp = &request_list[i];
983
984 /*
985 * Skip file systems that are not mounted if either the
986 * -l or -n options were specified. If none of these options
987 * are present, the appropriate FS-specific df will be invoked.
988 */
989 if (! DFR_ISMOUNTEDFS(dfrp)) {
990 if (l_option || n_option) {
991 errmsg(ERR_NOFLAGS,
992 "%s option incompatible with unmounted "
993 "special device (%s)",
994 l_option ? "-l" : "-n", dfrp->dfr_cmd_arg);
995 dfrp->dfr_valid = FALSE;
996 errors++;
997 }
998 else
999 n_valid++;
1000 continue;
1001 }
1002
1003 /*
1004 * Check for inconsistency between the argument of -F and
1005 * the actual file system type.
1006 * If there is an inconsistency and the user specified a
1007 * path, this is an error since we are asked to interpret
1008 * the path using the wrong file system type. If there is
1009 * no path associated with this request, we quietly ignore it.
1010 */
1011 if (F_option && ! EQ(dfrp->dfr_fstype, FSType)) {
1012 dfrp->dfr_valid = FALSE;
1013 if (dfrp->dfr_cmd_arg != NULL) {
1014 errmsg(ERR_NOFLAGS,
1015 "Warning: %s mounted as a %s file system",
1016 dfrp->dfr_cmd_arg, dfrp->dfr_fstype);
1017 errors++;
1018 }
1019 continue;
1020 }
1021
1022 /*
1023 * Skip remote file systems if the -l option is present
1024 */
1025 if (l_option && is_remote_fs(dfrp->dfr_fstype)) {
1026 if (dfrp->dfr_cmd_arg != NULL) {
1027 errmsg(ERR_NOFLAGS,
1028 "Warning: %s is not a local file system",
1029 dfrp->dfr_cmd_arg);
1030 errors++;
1031 }
1032 dfrp->dfr_valid = FALSE;
1033 continue;
1034 }
1035
1036 /*
1037 * Skip file systems mounted as "ignore" unless the -a option
1038 * is present, or the user explicitly specified them on
1039 * the command line.
1040 */
1041 if (dfrp->dfr_mte->mte_ignore &&
1042 ! (a_option || dfrp->dfr_cmd_arg)) {
1043 dfrp->dfr_valid = FALSE;
1044 continue;
1045 }
1046
1047 n_valid++;
1048 }
1049 *valid_requests = n_valid;
1050 return (errors);
1051 }
1052
1053
1054 /*
1055 * Print the appropriate header for the requested output format.
1056 * Options are checked in order of their precedence.
1057 */
1058 static void
print_header(void)1059 print_header(void)
1060 {
1061 if (use_scaling) { /* this comes from the -h option */
1062 int arg = 'h';
1063
1064 (void) printf("%-*s %*s %*s %*s %-*s %s\n",
1065 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1066 SCALED_WIDTH, TRANSLATE("Size"),
1067 SCALED_WIDTH, TRANSLATE("Used"),
1068 AVAILABLE_WIDTH, TRANSLATE("Available"),
1069 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1070 TRANSLATE("Mounted on"));
1071 SET_OPTION(h);
1072 return;
1073 }
1074 if (k_option) {
1075 int arg = 'h';
1076
1077 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1078 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1079 KBYTE_WIDTH, TRANSLATE("1024-blocks"),
1080 KBYTE_WIDTH, TRANSLATE("Used"),
1081 KBYTE_WIDTH, TRANSLATE("Available"),
1082 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1083 TRANSLATE("Mounted on"));
1084 SET_OPTION(h);
1085 return;
1086 }
1087 if (m_option) {
1088 int arg = 'h';
1089
1090 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1091 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1092 KBYTE_WIDTH, TRANSLATE("1M-blocks"),
1093 KBYTE_WIDTH, TRANSLATE("Used"),
1094 KBYTE_WIDTH, TRANSLATE("Available"),
1095 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1096 TRANSLATE("Mounted on"));
1097 SET_OPTION(h);
1098 return;
1099 }
1100 /* Added for XCU4 compliance */
1101 if (P_option) {
1102 int arg = 'h';
1103
1104 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1105 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1106 KBYTE_WIDTH, TRANSLATE("512-blocks"),
1107 KBYTE_WIDTH, TRANSLATE("Used"),
1108 KBYTE_WIDTH, TRANSLATE("Available"),
1109 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1110 TRANSLATE("Mounted on"));
1111
1112 SET_OPTION(h);
1113 return;
1114 }
1115 /* End XCU4 */
1116 if (v_option) {
1117 (void) printf("%-*s %-*s %*s %*s %*s %-*s\n",
1118 IBCS2_MOUNT_POINT_WIDTH, TRANSLATE("Mount Dir"),
1119 IBCS2_FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1120 BLOCK_WIDTH, TRANSLATE("blocks"),
1121 BLOCK_WIDTH, TRANSLATE("used"),
1122 BLOCK_WIDTH, TRANSLATE("free"),
1123 CAPACITY_WIDTH, TRANSLATE(" %used"));
1124 return;
1125 }
1126 if (e_option) {
1127 (void) printf(gettext("%-*s %*s\n"),
1128 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1129 BLOCK_WIDTH, TRANSLATE("ifree"));
1130 return;
1131 }
1132 if (b_option) {
1133 (void) printf(gettext("%-*s %*s\n"),
1134 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1135 BLOCK_WIDTH, TRANSLATE("avail"));
1136 return;
1137 }
1138 }
1139
1140
1141 /*
1142 * Convert an unsigned long long to a string representation and place the
1143 * result in the caller-supplied buffer.
1144 * The given number is in units of "unit_from" size, but the
1145 * converted number will be in units of "unit_to" size. The unit sizes
1146 * must be powers of 2.
1147 * The value "(unsigned long long)-1" is a special case and is always
1148 * converted to "-1".
1149 * Returns a pointer to the caller-supplied buffer.
1150 */
1151 static char *
number_to_string(char * buf,unsigned long long number,int unit_from,int unit_to)1152 number_to_string(
1153 char *buf, /* put the result here */
1154 unsigned long long number, /* convert this number */
1155 int unit_from, /* from units of this size */
1156 int unit_to) /* to units of this size */
1157 {
1158 if ((long long)number == (long long)-1) {
1159 (void) strcpy(buf, "-1");
1160 return (buf);
1161 }
1162
1163 /* don't crash if, i.e. fsp->f_frsize == 0 */
1164 if (unit_from <= 0)
1165 unit_from = 1;
1166 if (unit_to <= 0)
1167 unit_to = 1;
1168
1169 if (unit_from == unit_to)
1170 (void) sprintf(buf, "%llu", number);
1171 else if (unit_from < unit_to)
1172 (void) sprintf(buf, "%llu",
1173 number / (unsigned long long)(unit_to / unit_from));
1174 else
1175 (void) sprintf(buf, "%llu",
1176 number * (unsigned long long)(unit_from / unit_to));
1177
1178 return (buf);
1179 }
1180
1181 /*
1182 * The statvfs() implementation allows us to return only two values, the total
1183 * number of blocks and the number of blocks free. The equation 'used = total -
1184 * free' will not work for ZFS filesystems, due to the nature of pooled storage.
1185 * We choose to return values in the statvfs structure that will produce correct
1186 * results for 'used' and 'available', but not 'total'. This function will open
1187 * the underlying ZFS dataset if necessary and get the real value.
1188 */
1189 static void
adjust_total_blocks(struct df_request * dfrp,fsblkcnt64_t * total,uint64_t blocksize)1190 adjust_total_blocks(struct df_request *dfrp, fsblkcnt64_t *total,
1191 uint64_t blocksize)
1192 {
1193 char *dataset, *slash;
1194 boolean_t first = TRUE;
1195 uint64_t quota = 0;
1196
1197 if (strcmp(DFR_FSTYPE(dfrp), MNTTYPE_ZFS) != 0 || !load_libzfs())
1198 return;
1199
1200 /*
1201 * We want to get the total size for this filesystem as bounded by any
1202 * quotas. In order to do this, we start at the current filesystem and
1203 * work upwards looking for the smallest quota. When we reach the
1204 * pool itself, the quota is the amount used plus the amount
1205 * available.
1206 */
1207 if ((dataset = strdup(DFR_SPECIAL(dfrp))) == NULL)
1208 return;
1209
1210 slash = dataset + strlen(dataset);
1211 while (slash != NULL) {
1212 zfs_handle_t *zhp;
1213 uint64_t this_quota;
1214
1215 *slash = '\0';
1216
1217 zhp = _zfs_open(g_zfs, dataset, ZFS_TYPE_DATASET);
1218 if (zhp == NULL)
1219 break;
1220
1221 /* true at first iteration of loop */
1222 if (first) {
1223 quota = _zfs_prop_get_int(zhp, ZFS_PROP_REFQUOTA);
1224 if (quota == 0)
1225 quota = UINT64_MAX;
1226 first = FALSE;
1227 }
1228
1229 this_quota = _zfs_prop_get_int(zhp, ZFS_PROP_QUOTA);
1230 if (this_quota && this_quota < quota)
1231 quota = this_quota;
1232
1233 /* true at last iteration of loop */
1234 if ((slash = strrchr(dataset, '/')) == NULL) {
1235 uint64_t size;
1236
1237 size = _zfs_prop_get_int(zhp, ZFS_PROP_USED) +
1238 _zfs_prop_get_int(zhp, ZFS_PROP_AVAILABLE);
1239 if (size < quota)
1240 quota = size;
1241 }
1242
1243 _zfs_close(zhp);
1244 }
1245
1246 /*
1247 * Modify total only if we managed to get some stats from libzfs.
1248 */
1249 if (quota != 0)
1250 *total = quota / blocksize;
1251 free(dataset);
1252 }
1253
1254 /*
1255 * The output will appear properly columnized regardless of the names of
1256 * the various fields
1257 */
1258 static void
g_output(struct df_request * dfrp,struct statvfs64 * fsp)1259 g_output(struct df_request *dfrp, struct statvfs64 *fsp)
1260 {
1261 fsblkcnt64_t available_blocks = fsp->f_bavail;
1262 fsblkcnt64_t total_blocks = fsp->f_blocks;
1263 numbuf_t total_blocks_buf;
1264 numbuf_t total_files_buf;
1265 numbuf_t free_blocks_buf;
1266 numbuf_t available_blocks_buf;
1267 numbuf_t free_files_buf;
1268 numbuf_t fname_buf;
1269 char *temp_buf;
1270
1271 #define DEFINE_STR_LEN(var) \
1272 static char *var##_str; \
1273 static size_t var##_len
1274
1275 #define SET_STR_LEN(name, var)\
1276 if (! var##_str) {\
1277 var##_str = TRANSLATE(name); \
1278 var##_len = strlen(var##_str); \
1279 }
1280
1281 DEFINE_STR_LEN(block_size);
1282 DEFINE_STR_LEN(frag_size);
1283 DEFINE_STR_LEN(total_blocks);
1284 DEFINE_STR_LEN(free_blocks);
1285 DEFINE_STR_LEN(available);
1286 DEFINE_STR_LEN(total_files);
1287 DEFINE_STR_LEN(free_files);
1288 DEFINE_STR_LEN(fstype);
1289 DEFINE_STR_LEN(fsys_id);
1290 DEFINE_STR_LEN(fname);
1291 DEFINE_STR_LEN(flag);
1292
1293 /*
1294 * TRANSLATION_NOTE
1295 * The first argument of each of the following macro invocations is a
1296 * string that needs to be translated.
1297 */
1298 SET_STR_LEN("block size", block_size);
1299 SET_STR_LEN("frag size", frag_size);
1300 SET_STR_LEN("total blocks", total_blocks);
1301 SET_STR_LEN("free blocks", free_blocks);
1302 SET_STR_LEN("available", available);
1303 SET_STR_LEN("total files", total_files);
1304 SET_STR_LEN("free files", free_files);
1305 SET_STR_LEN("fstype", fstype);
1306 SET_STR_LEN("filesys id", fsys_id);
1307 SET_STR_LEN("filename length", fname);
1308 SET_STR_LEN("flag", flag);
1309
1310 #define NCOL1_WIDTH (int)MAX3(BLOCK_WIDTH, NFILES_WIDTH, FSTYPE_WIDTH)
1311 #define NCOL2_WIDTH (int)MAX3(BLOCK_WIDTH, FSID_WIDTH, FLAG_WIDTH) + 2
1312 #define NCOL3_WIDTH (int)MAX3(BSIZE_WIDTH, BLOCK_WIDTH, NAMELEN_WIDTH)
1313 #define NCOL4_WIDTH (int)MAX(FRAGSIZE_WIDTH, NFILES_WIDTH)
1314
1315 #define SCOL1_WIDTH (int)MAX3(total_blocks_len, free_files_len, fstype_len)
1316 #define SCOL2_WIDTH (int)MAX3(free_blocks_len, fsys_id_len, flag_len)
1317 #define SCOL3_WIDTH (int)MAX3(block_size_len, available_len, fname_len)
1318 #define SCOL4_WIDTH (int)MAX(frag_size_len, total_files_len)
1319
1320 temp_buf = xmalloc(
1321 MAX(MOUNT_POINT_WIDTH, strlen(DFR_MOUNT_POINT(dfrp)))
1322 + MAX(SPECIAL_DEVICE_WIDTH, strlen(DFR_SPECIAL(dfrp)))
1323 + 20); /* plus slop - nulls & formatting */
1324 (void) sprintf(temp_buf, "%-*s(%-*s):",
1325 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1326 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp));
1327
1328 (void) printf("%-*s %*lu %-*s %*lu %-*s\n",
1329 NCOL1_WIDTH + 1 + SCOL1_WIDTH + 1 + NCOL2_WIDTH + 1 + SCOL2_WIDTH,
1330 temp_buf,
1331 NCOL3_WIDTH, fsp->f_bsize, SCOL3_WIDTH, block_size_str,
1332 NCOL4_WIDTH, fsp->f_frsize, SCOL4_WIDTH, frag_size_str);
1333 free(temp_buf);
1334
1335 /*
1336 * Adjust available_blocks value - it can be less than 0 on
1337 * a 4.x file system. Reset it to 0 in order to avoid printing
1338 * negative numbers.
1339 */
1340 if ((long long)available_blocks < (long long)0)
1341 available_blocks = (fsblkcnt64_t)0;
1342
1343 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1344
1345 (void) printf("%*s %-*s %*s %-*s %*s %-*s %*s %-*s\n",
1346 NCOL1_WIDTH, number_to_string(total_blocks_buf,
1347 total_blocks, fsp->f_frsize, 512),
1348 SCOL1_WIDTH, total_blocks_str,
1349 NCOL2_WIDTH, number_to_string(free_blocks_buf,
1350 fsp->f_bfree, fsp->f_frsize, 512),
1351 SCOL2_WIDTH, free_blocks_str,
1352 NCOL3_WIDTH, number_to_string(available_blocks_buf,
1353 available_blocks, fsp->f_frsize, 512),
1354 SCOL3_WIDTH, available_str,
1355 NCOL4_WIDTH, number_to_string(total_files_buf,
1356 fsp->f_files, 1, 1),
1357 SCOL4_WIDTH, total_files_str);
1358
1359 (void) printf("%*s %-*s %*lu %-*s %s\n",
1360 NCOL1_WIDTH, number_to_string(free_files_buf,
1361 fsp->f_ffree, 1, 1),
1362 SCOL1_WIDTH, free_files_str,
1363 NCOL2_WIDTH, fsp->f_fsid, SCOL2_WIDTH, fsys_id_str,
1364 fsp->f_fstr);
1365
1366 (void) printf("%*s %-*s %#*.*lx %-*s %*s %-*s\n\n",
1367 NCOL1_WIDTH, fsp->f_basetype, SCOL1_WIDTH, fstype_str,
1368 NCOL2_WIDTH, NCOL2_WIDTH-2, fsp->f_flag, SCOL2_WIDTH, flag_str,
1369 NCOL3_WIDTH, number_to_string(fname_buf,
1370 (unsigned long long)fsp->f_namemax, 1, 1),
1371 SCOL3_WIDTH, fname_str);
1372 }
1373
1374
1375 static void
k_output(struct df_request * dfrp,struct statvfs64 * fsp)1376 k_output(struct df_request *dfrp, struct statvfs64 *fsp)
1377 {
1378 fsblkcnt64_t total_blocks = fsp->f_blocks;
1379 fsblkcnt64_t free_blocks = fsp->f_bfree;
1380 fsblkcnt64_t available_blocks = fsp->f_bavail;
1381 fsblkcnt64_t used_blocks;
1382 char *file_system = DFR_SPECIAL(dfrp);
1383 numbuf_t total_blocks_buf;
1384 numbuf_t used_blocks_buf;
1385 numbuf_t available_blocks_buf;
1386 char capacity_buf[LINEBUF_SIZE];
1387
1388 /*
1389 * If the free block count is -1, don't trust anything but the total
1390 * number of blocks.
1391 */
1392 if (free_blocks == (fsblkcnt64_t)-1) {
1393 used_blocks = (fsblkcnt64_t)-1;
1394 (void) strcpy(capacity_buf, " 100%");
1395 } else {
1396 fsblkcnt64_t reserved_blocks = free_blocks - available_blocks;
1397
1398 used_blocks = total_blocks - free_blocks;
1399
1400 /*
1401 * The capacity estimation is bogus when available_blocks is 0
1402 * and the super-user has allocated more space. The reason
1403 * is that reserved_blocks is inaccurate in that case, because
1404 * when the super-user allocates space, free_blocks is updated
1405 * but available_blocks is not (since it can't drop below 0).
1406 *
1407 * XCU4 and POSIX.2 require that any fractional result of the
1408 * capacity estimation be rounded to the next highest integer,
1409 * hence the addition of 0.5.
1410 */
1411 (void) sprintf(capacity_buf, "%5.0f%%",
1412 (total_blocks == 0) ? 0.0 :
1413 ((double)used_blocks /
1414 (double)(total_blocks - reserved_blocks))
1415 * 100.0 + 0.5);
1416 }
1417
1418 /*
1419 * The available_blocks can be less than 0 on a 4.x file system.
1420 * Reset it to 0 in order to avoid printing negative numbers.
1421 */
1422 if ((long long)available_blocks < (long long)0)
1423 available_blocks = (fsblkcnt64_t)0;
1424 /*
1425 * Print long special device names (usually NFS mounts) in a line
1426 * by themselves when the output is directed to a terminal.
1427 */
1428 if (tty_output && strlen(file_system) > (size_t)FILESYSTEM_WIDTH) {
1429 (void) printf("%s\n", file_system);
1430 file_system = "";
1431 }
1432
1433 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1434
1435 if (use_scaling) { /* comes from the -h option */
1436 nicenum_scale(total_blocks, fsp->f_frsize,
1437 total_blocks_buf, sizeof (total_blocks_buf), 0);
1438 nicenum_scale(used_blocks, fsp->f_frsize,
1439 used_blocks_buf, sizeof (used_blocks_buf), 0);
1440 nicenum_scale(available_blocks, fsp->f_frsize,
1441 available_blocks_buf, sizeof (available_blocks_buf), 0);
1442
1443 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1444 FILESYSTEM_WIDTH, file_system,
1445 SCALED_WIDTH, total_blocks_buf,
1446 SCALED_WIDTH, used_blocks_buf,
1447 AVAILABLE_WIDTH, available_blocks_buf,
1448 CAPACITY_WIDTH, capacity_buf, DFR_MOUNT_POINT(dfrp));
1449 return;
1450 }
1451
1452 if (v_option) {
1453 (void) printf("%-*.*s %-*.*s %*lld %*lld %*lld %-.*s\n",
1454 IBCS2_MOUNT_POINT_WIDTH, IBCS2_MOUNT_POINT_WIDTH,
1455 DFR_MOUNT_POINT(dfrp),
1456 IBCS2_FILESYSTEM_WIDTH, IBCS2_FILESYSTEM_WIDTH, file_system,
1457 BLOCK_WIDTH, total_blocks,
1458 BLOCK_WIDTH, used_blocks,
1459 BLOCK_WIDTH, available_blocks,
1460 CAPACITY_WIDTH, capacity_buf);
1461 return;
1462 }
1463
1464 if (P_option && !k_option && !m_option) {
1465 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1466 FILESYSTEM_WIDTH, file_system,
1467 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1468 total_blocks, fsp->f_frsize, 512),
1469 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1470 used_blocks, fsp->f_frsize, 512),
1471 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1472 available_blocks, fsp->f_frsize, 512),
1473 CAPACITY_WIDTH, capacity_buf,
1474 DFR_MOUNT_POINT(dfrp));
1475 } else if (m_option) {
1476 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1477 FILESYSTEM_WIDTH, file_system,
1478 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1479 total_blocks, fsp->f_frsize, 1024*1024),
1480 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1481 used_blocks, fsp->f_frsize, 1024*1024),
1482 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1483 available_blocks, fsp->f_frsize, 1024*1024),
1484 CAPACITY_WIDTH, capacity_buf,
1485 DFR_MOUNT_POINT(dfrp));
1486 } else {
1487 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1488 FILESYSTEM_WIDTH, file_system,
1489 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1490 total_blocks, fsp->f_frsize, 1024),
1491 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1492 used_blocks, fsp->f_frsize, 1024),
1493 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1494 available_blocks, fsp->f_frsize, 1024),
1495 CAPACITY_WIDTH, capacity_buf,
1496 DFR_MOUNT_POINT(dfrp));
1497 }
1498 }
1499
1500 /*
1501 * The following is for internationalization support.
1502 */
1503 static bool_int strings_initialized;
1504 static char *files_str;
1505 static char *blocks_str;
1506 static char *total_str;
1507 static char *kilobytes_str;
1508
1509 static void
strings_init(void)1510 strings_init(void)
1511 {
1512 total_str = TRANSLATE("total");
1513 files_str = TRANSLATE("files");
1514 blocks_str = TRANSLATE("blocks");
1515 kilobytes_str = TRANSLATE("kilobytes");
1516 strings_initialized = TRUE;
1517 }
1518
1519 #define STRINGS_INIT() if (!strings_initialized) strings_init()
1520
1521
1522 static void
t_output(struct df_request * dfrp,struct statvfs64 * fsp)1523 t_output(struct df_request *dfrp, struct statvfs64 *fsp)
1524 {
1525 fsblkcnt64_t total_blocks = fsp->f_blocks;
1526 numbuf_t total_blocks_buf;
1527 numbuf_t total_files_buf;
1528 numbuf_t free_blocks_buf;
1529 numbuf_t free_files_buf;
1530
1531 STRINGS_INIT();
1532
1533 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1534
1535 (void) printf("%-*s(%-*s): %*s %s %*s %s\n",
1536 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1537 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1538 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1539 fsp->f_bfree, fsp->f_frsize, 512),
1540 blocks_str,
1541 NFILES_WIDTH, number_to_string(free_files_buf,
1542 fsp->f_ffree, 1, 1),
1543 files_str);
1544 /*
1545 * The total column used to use the same space as the mnt pt & special
1546 * dev fields. However, this doesn't work with massive special dev
1547 * fields * (eg > 500 chars) causing an enormous amount of white space
1548 * before the total column (see bug 4100411). So the code was
1549 * simplified to set the total column at the usual gap.
1550 * This had the side effect of fixing a bug where the previously
1551 * used static buffer was overflowed by the same massive special dev.
1552 */
1553 (void) printf("%*s: %*s %s %*s %s\n",
1554 MNT_SPEC_WIDTH, total_str,
1555 BLOCK_WIDTH, number_to_string(total_blocks_buf,
1556 total_blocks, fsp->f_frsize, 512),
1557 blocks_str,
1558 NFILES_WIDTH, number_to_string(total_files_buf,
1559 fsp->f_files, 1, 1),
1560 files_str);
1561 }
1562
1563
1564 static void
eb_output(struct df_request * dfrp,struct statvfs64 * fsp)1565 eb_output(struct df_request *dfrp, struct statvfs64 *fsp)
1566 {
1567 numbuf_t free_files_buf;
1568 numbuf_t free_kbytes_buf;
1569
1570 STRINGS_INIT();
1571
1572 (void) printf("%-*s(%-*s): %*s %s\n",
1573 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1574 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1575 MAX(KBYTE_WIDTH, NFILES_WIDTH),
1576 number_to_string(free_kbytes_buf,
1577 fsp->f_bfree, fsp->f_frsize, 1024),
1578 kilobytes_str);
1579 (void) printf("%-*s(%-*s): %*s %s\n",
1580 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1581 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1582 MAX(NFILES_WIDTH, NFILES_WIDTH),
1583 number_to_string(free_files_buf, fsp->f_ffree, 1, 1),
1584 files_str);
1585 }
1586
1587
1588 static void
e_output(struct df_request * dfrp,struct statvfs64 * fsp)1589 e_output(struct df_request *dfrp, struct statvfs64 *fsp)
1590 {
1591 numbuf_t free_files_buf;
1592
1593 (void) printf("%-*s %*s\n",
1594 FILESYSTEM_WIDTH, DFR_SPECIAL(dfrp),
1595 NFILES_WIDTH,
1596 number_to_string(free_files_buf, fsp->f_ffree, 1, 1));
1597 }
1598
1599
1600 static void
b_output(struct df_request * dfrp,struct statvfs64 * fsp)1601 b_output(struct df_request *dfrp, struct statvfs64 *fsp)
1602 {
1603 numbuf_t free_blocks_buf;
1604
1605 (void) printf("%-*s %*s\n",
1606 FILESYSTEM_WIDTH, DFR_SPECIAL(dfrp),
1607 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1608 fsp->f_bfree, fsp->f_frsize, 1024));
1609 }
1610
1611
1612 /* ARGSUSED */
1613 static void
n_output(struct df_request * dfrp,struct statvfs64 * fsp)1614 n_output(struct df_request *dfrp, struct statvfs64 *fsp)
1615 {
1616 (void) printf("%-*s: %-*s\n",
1617 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1618 FSTYPE_WIDTH, dfrp->dfr_fstype);
1619 }
1620
1621
1622 static void
default_output(struct df_request * dfrp,struct statvfs64 * fsp)1623 default_output(struct df_request *dfrp, struct statvfs64 *fsp)
1624 {
1625 numbuf_t free_blocks_buf;
1626 numbuf_t free_files_buf;
1627
1628 STRINGS_INIT();
1629
1630 (void) printf("%-*s(%-*s):%*s %s %*s %s\n",
1631 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1632 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1633 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1634 fsp->f_bfree, fsp->f_frsize, 512),
1635 blocks_str,
1636 NFILES_WIDTH, number_to_string(free_files_buf,
1637 fsp->f_ffree, 1, 1),
1638 files_str);
1639 }
1640
1641
1642 /* ARGSUSED */
1643 static void
V_output(struct df_request * dfrp,struct statvfs64 * fsp)1644 V_output(struct df_request *dfrp, struct statvfs64 *fsp)
1645 {
1646 char temp_buf[LINEBUF_SIZE];
1647
1648 if (df_options_len > 1)
1649 (void) strcat(strcpy(temp_buf, df_options), " ");
1650 else
1651 temp_buf[0] = NUL;
1652
1653 (void) printf("%s -F %s %s%s\n",
1654 program_name, dfrp->dfr_fstype, temp_buf,
1655 dfrp->dfr_cmd_arg ? dfrp->dfr_cmd_arg: DFR_SPECIAL(dfrp));
1656 }
1657
1658
1659 /*
1660 * This function is used to sort the array of df_requests according to fstype
1661 */
1662 static int
df_reqcomp(const void * p1,const void * p2)1663 df_reqcomp(const void *p1, const void *p2)
1664 {
1665 int v = strcmp(DFRP(p1)->dfr_fstype, DFRP(p2)->dfr_fstype);
1666
1667 if (v != 0)
1668 return (v);
1669 else
1670 return (DFRP(p1)->dfr_index - DFRP(p2)->dfr_index);
1671 }
1672
1673
1674 static void
vfs_error(char * file,int status)1675 vfs_error(char *file, int status)
1676 {
1677 if (status == VFS_TOOLONG)
1678 errmsg(ERR_NOFLAGS, "a line in %s exceeds %d characters",
1679 file, MNT_LINE_MAX);
1680 else if (status == VFS_TOOMANY)
1681 errmsg(ERR_NOFLAGS, "a line in %s has too many fields", file);
1682 else if (status == VFS_TOOFEW)
1683 errmsg(ERR_NOFLAGS, "a line in %s has too few fields", file);
1684 else
1685 errmsg(ERR_NOFLAGS, "error while reading %s: %d", file, status);
1686 }
1687
1688
1689 /*
1690 * Try to determine the fstype for the specified block device.
1691 * Return in order of decreasing preference:
1692 * file system type from vfstab
1693 * file system type as specified by -F option
1694 * default file system type
1695 */
1696 static char *
find_fstype(char * special)1697 find_fstype(char *special)
1698 {
1699 struct vfstab vtab;
1700 FILE *fp;
1701 int status;
1702 char *vfstab_file = VFS_TAB;
1703
1704 fp = xfopen(vfstab_file);
1705 status = getvfsspec(fp, &vtab, special);
1706 (void) fclose(fp);
1707 if (status > 0)
1708 vfs_error(vfstab_file, status);
1709
1710 if (status == 0) {
1711 if (F_option && ! EQ(FSType, vtab.vfs_fstype))
1712 errmsg(ERR_NOFLAGS,
1713 "warning: %s is of type %s", special, vtab.vfs_fstype);
1714 return (new_string(vtab.vfs_fstype));
1715 }
1716 else
1717 return (F_option ? FSType : default_fstype(special));
1718 }
1719
1720 /*
1721 * When this function returns, the following fields are filled for all
1722 * valid entries in the requests[] array:
1723 * dfr_mte (if the file system is mounted)
1724 * dfr_fstype
1725 * dfr_index
1726 *
1727 * The function returns the number of errors that occurred while building
1728 * the request list.
1729 */
1730 static int
create_request_list(int argc,char * argv[],struct df_request * requests_p[],size_t * request_count)1731 create_request_list(
1732 int argc,
1733 char *argv[],
1734 struct df_request *requests_p[],
1735 size_t *request_count)
1736 {
1737 struct df_request *requests;
1738 struct df_request *dfrp;
1739 size_t size;
1740 size_t i;
1741 size_t request_index = 0;
1742 size_t max_requests;
1743 int errors = 0;
1744
1745 /*
1746 * If no args, use the mounted file systems, otherwise use the
1747 * user-specified arguments.
1748 */
1749 if (argc == 0) {
1750 mtab_read_file();
1751 max_requests = mount_table_entries;
1752 } else
1753 max_requests = argc;
1754
1755 size = max_requests * sizeof (struct df_request);
1756 requests = xmalloc(size);
1757 (void) memset(requests, 0, size);
1758
1759 if (argc == 0) {
1760 /*
1761 * If -Z wasn't specified, we skip mounts in other
1762 * zones. This obviously is a noop in a non-global
1763 * zone.
1764 */
1765 boolean_t showall = (getzoneid() != GLOBAL_ZONEID) || Z_option;
1766 struct zone_summary *zsp;
1767
1768 if (!showall) {
1769 zsp = fs_get_zone_summaries();
1770 if (zsp == NULL)
1771 errmsg(ERR_FATAL,
1772 "unable to retrieve list of zones");
1773 }
1774
1775 for (i = 0; i < mount_table_entries; i++) {
1776 struct extmnttab *mtp = mount_table[i].mte_mount;
1777
1778 if (EQ(mtp->mnt_fstype, MNTTYPE_SWAP))
1779 continue;
1780
1781 if (!showall) {
1782 if (fs_mount_in_other_zone(zsp,
1783 mtp->mnt_mountp))
1784 continue;
1785 }
1786 dfrp = &requests[request_index++];
1787 dfrp->dfr_mte = &mount_table[i];
1788 dfrp->dfr_fstype = mtp->mnt_fstype;
1789 dfrp->dfr_index = i;
1790 dfrp->dfr_valid = TRUE;
1791 }
1792 } else {
1793 struct stat64 *arg_stat; /* array of stat structures */
1794 bool_int *valid_stat; /* which structures are valid */
1795
1796 arg_stat = xmalloc(argc * sizeof (struct stat64));
1797 valid_stat = xmalloc(argc * sizeof (bool_int));
1798
1799 /*
1800 * Obtain stat64 information for each argument before
1801 * constructing the list of mounted file systems. By
1802 * touching all these places we force the automounter
1803 * to establish any mounts required to access the arguments,
1804 * so that the corresponding mount table entries will exist
1805 * when we look for them.
1806 * It is still possible that the automounter may timeout
1807 * mounts between the time we read the mount table and the
1808 * time we process the request. Even in that case, when
1809 * we issue the statvfs64(2) for the mount point, the file
1810 * system will be mounted again. The only problem will
1811 * occur if the automounter maps change in the meantime
1812 * and the mount point is eliminated.
1813 */
1814 for (i = 0; i < argc; i++)
1815 valid_stat[i] = (stat64(argv[i], &arg_stat[i]) == 0);
1816
1817 mtab_read_file();
1818
1819 for (i = 0; i < argc; i++) {
1820 char *arg = argv[i];
1821
1822 dfrp = &requests[request_index];
1823
1824 dfrp->dfr_index = request_index;
1825 dfrp->dfr_cmd_arg = arg;
1826
1827 if (valid_stat[i]) {
1828 dfrp->dfr_fstype = arg_stat[i].st_fstype;
1829 if (S_ISBLK(arg_stat[i].st_mode)) {
1830 bdev_mount_entry(dfrp);
1831 dfrp->dfr_valid = TRUE;
1832 } else if (S_ISDIR(arg_stat[i].st_mode) ||
1833 S_ISREG(arg_stat[i].st_mode) ||
1834 S_ISFIFO(arg_stat[i].st_mode)) {
1835 path_mount_entry(dfrp,
1836 arg_stat[i].st_dev);
1837 if (! DFR_ISMOUNTEDFS(dfrp)) {
1838 errors++;
1839 continue;
1840 }
1841 dfrp->dfr_valid = TRUE;
1842 }
1843 } else {
1844 resource_mount_entry(dfrp);
1845 dfrp->dfr_valid = DFR_ISMOUNTEDFS(dfrp);
1846 }
1847
1848 /*
1849 * If we haven't managed to verify that the request
1850 * is valid, we must have gotten a bad argument.
1851 */
1852 if (!dfrp->dfr_valid) {
1853 errmsg(ERR_NOFLAGS,
1854 "(%-10s) not a block device, directory or "
1855 "mounted resource", arg);
1856 errors++;
1857 continue;
1858 }
1859
1860 /*
1861 * Determine the file system type.
1862 */
1863 if (DFR_ISMOUNTEDFS(dfrp))
1864 dfrp->dfr_fstype =
1865 dfrp->dfr_mte->mte_mount->mnt_fstype;
1866 else
1867 dfrp->dfr_fstype =
1868 find_fstype(dfrp->dfr_cmd_arg);
1869
1870 request_index++;
1871 }
1872 }
1873 *requests_p = requests;
1874 *request_count = request_index;
1875 return (errors);
1876 }
1877
1878
1879 /*
1880 * Select the appropriate function and flags to use for output.
1881 * Notice that using both -e and -b options produces a different form of
1882 * output than either of those two options alone; this is the behavior of
1883 * the SVR4 df.
1884 */
1885 static struct df_output *
select_output(void)1886 select_output(void)
1887 {
1888 static struct df_output dfo;
1889
1890 /*
1891 * The order of checking options follows the option precedence
1892 * rules as they are listed in the man page.
1893 */
1894 if (use_scaling) { /* comes from the -h option */
1895 dfo.dfo_func = k_output;
1896 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1897 } else if (V_option) {
1898 dfo.dfo_func = V_output;
1899 dfo.dfo_flags = DFO_NOFLAGS;
1900 } else if (g_option) {
1901 dfo.dfo_func = g_output;
1902 dfo.dfo_flags = DFO_STATVFS;
1903 } else if (k_option || m_option || P_option || v_option) {
1904 dfo.dfo_func = k_output;
1905 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1906 } else if (t_option) {
1907 dfo.dfo_func = t_output;
1908 dfo.dfo_flags = DFO_STATVFS;
1909 } else if (b_option && e_option) {
1910 dfo.dfo_func = eb_output;
1911 dfo.dfo_flags = DFO_STATVFS;
1912 } else if (b_option) {
1913 dfo.dfo_func = b_output;
1914 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1915 } else if (e_option) {
1916 dfo.dfo_func = e_output;
1917 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1918 } else if (n_option) {
1919 dfo.dfo_func = n_output;
1920 dfo.dfo_flags = DFO_NOFLAGS;
1921 } else {
1922 dfo.dfo_func = default_output;
1923 dfo.dfo_flags = DFO_STATVFS;
1924 }
1925 return (&dfo);
1926 }
1927
1928
1929 /*
1930 * The (argc,argv) pair contains all the non-option arguments
1931 */
1932 static void
do_df(int argc,char * argv[])1933 do_df(int argc, char *argv[])
1934 {
1935 size_t i;
1936 struct df_request *requests; /* array of requests */
1937 size_t n_requests;
1938 struct df_request *dfrp;
1939 int errors;
1940
1941 errors = create_request_list(argc, argv, &requests, &n_requests);
1942
1943 if (n_requests == 0)
1944 exit(errors);
1945
1946 /*
1947 * If we are going to run the FSType-specific df command,
1948 * rearrange the requests so that we can issue a single command
1949 * per file system type.
1950 */
1951 if (o_option) {
1952 size_t j;
1953
1954 /*
1955 * qsort is not a stable sorting method (i.e. requests of
1956 * the same file system type may be swapped, and hence appear
1957 * in the output in a different order from the one in which
1958 * they were listed in the command line). In order to force
1959 * stability, we use the dfr_index field which is unique
1960 * for each request.
1961 */
1962 qsort(requests,
1963 n_requests, sizeof (struct df_request), df_reqcomp);
1964 for (i = 0; i < n_requests; i = j) {
1965 char *fstype = requests[i].dfr_fstype;
1966
1967 for (j = i+1; j < n_requests; j++)
1968 if (! EQ(fstype, requests[j].dfr_fstype))
1969 break;
1970
1971 /*
1972 * At this point, requests in the range [i,j) are
1973 * of the same type.
1974 *
1975 * If the -F option was used, and the user specified
1976 * arguments, the filesystem types must match
1977 *
1978 * XXX: the alternative of doing this check here is to
1979 * invoke prune_list, but then we have to
1980 * modify this code to ignore invalid requests.
1981 */
1982 if (F_option && ! EQ(fstype, FSType)) {
1983 size_t k;
1984
1985 for (k = i; k < j; k++) {
1986 dfrp = &requests[k];
1987 if (dfrp->dfr_cmd_arg != NULL) {
1988 errmsg(ERR_NOFLAGS,
1989 "Warning: %s mounted as a "
1990 "%s file system",
1991 dfrp->dfr_cmd_arg,
1992 dfrp->dfr_fstype);
1993 errors++;
1994 }
1995 }
1996 } else
1997 errors += run_fs_specific_df(&requests[i], j-i);
1998 }
1999 } else {
2000 size_t valid_requests;
2001
2002 /*
2003 * We have to prune the request list to avoid printing a header
2004 * if there are no valid requests
2005 */
2006 errors += prune_list(requests, n_requests, &valid_requests);
2007
2008 if (valid_requests) {
2009 struct df_output *dfop = select_output();
2010
2011 /* indicates if we already printed out a header line */
2012 int printed_header = 0;
2013
2014 for (i = 0; i < n_requests; i++) {
2015 dfrp = &requests[i];
2016 if (! dfrp->dfr_valid)
2017 continue;
2018
2019 /*
2020 * If we don't have a mount point,
2021 * this must be a block device.
2022 */
2023 if (DFR_ISMOUNTEDFS(dfrp)) {
2024 struct statvfs64 stvfs;
2025
2026 if ((dfop->dfo_flags & DFO_STATVFS) &&
2027 statvfs64(DFR_MOUNT_POINT(dfrp),
2028 &stvfs) == -1) {
2029 errmsg(ERR_PERROR,
2030 "cannot statvfs %s:",
2031 DFR_MOUNT_POINT(dfrp));
2032 errors++;
2033 continue;
2034 }
2035 if ((!printed_header) &&
2036 (dfop->dfo_flags & DFO_HEADER)) {
2037 print_header();
2038 printed_header = 1;
2039 }
2040
2041 (*dfop->dfo_func)(dfrp, &stvfs);
2042 } else {
2043 /*
2044 * -h option only works for
2045 * mounted filesystems
2046 */
2047 if (use_scaling) {
2048 errmsg(ERR_NOFLAGS,
2049 "-h option incompatible with unmounted special device (%s)",
2050 dfrp->dfr_cmd_arg);
2051 errors++;
2052 continue;
2053 }
2054 errors += run_fs_specific_df(dfrp, 1);
2055 }
2056 }
2057 }
2058 }
2059 exit(errors);
2060 }
2061
2062
2063 /*
2064 * The rest of this file implements the devnm command
2065 */
2066
2067 static char *
find_dev_name(char * file,dev_t dev)2068 find_dev_name(char *file, dev_t dev)
2069 {
2070 struct df_request dfreq;
2071
2072 dfreq.dfr_cmd_arg = file;
2073 dfreq.dfr_fstype = 0;
2074 dfreq.dfr_mte = NULL;
2075 path_mount_entry(&dfreq, dev);
2076 return (DFR_ISMOUNTEDFS(&dfreq) ? DFR_SPECIAL(&dfreq) : NULL);
2077 }
2078
2079
2080 static void
do_devnm(int argc,char * argv[])2081 do_devnm(int argc, char *argv[])
2082 {
2083 int arg;
2084 int errors = 0;
2085 char *dev_name;
2086
2087 if (argc == 1)
2088 errmsg(ERR_NONAME, "Usage: %s name ...", DEVNM_CMD);
2089
2090 mtab_read_file();
2091
2092 for (arg = 1; arg < argc; arg++) {
2093 char *file = argv[arg];
2094 struct stat64 st;
2095
2096 if (stat64(file, &st) == -1) {
2097 errmsg(ERR_PERROR, "%s: ", file);
2098 errors++;
2099 continue;
2100 }
2101
2102 if (! is_remote_fs(st.st_fstype) &&
2103 ! EQ(st.st_fstype, MNTTYPE_TMPFS) &&
2104 (dev_name = find_dev_name(file, st.st_dev)))
2105 (void) printf("%s %s\n", dev_name, file);
2106 else
2107 errmsg(ERR_NOFLAGS,
2108 "%s not found", file);
2109 }
2110 exit(errors);
2111 /* NOTREACHED */
2112 }
2113