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 #include <dlfcn.h>
31 #include <stdio.h>
32 #include <stdarg.h>
33 #include <string.h>
34 #include <locale.h>
35 #include <libintl.h>
36 #include <stdlib.h>
37 #include <ftw.h>
38 #include <errno.h>
39 #include <sys/types.h>
40 #include <unistd.h>
41 #include <sys/statvfs.h>
42 #include <sys/stat.h>
43 #include <sys/param.h>
44 #include <sys/mnttab.h>
45 #include <sys/mntent.h>
46 #include <sys/vfstab.h>
47 #include <sys/wait.h>
48 #include <sys/mkdev.h>
49 #include <sys/int_limits.h>
50 #include <sys/zone.h>
51 #include <libzfs.h>
52
53 #include "fslib.h"
54
55 extern char *default_fstype(char *);
56
57 /*
58 * General notice:
59 * String pointers in this code may point to statically allocated memory
60 * or dynamically allocated memory. Furthermore, a dynamically allocated
61 * string may be pointed to by more than one pointer. This does not pose
62 * a problem because malloc'ed memory is never free'd (so we don't need
63 * to remember which pointers point to malloc'ed memory).
64 */
65
66 /*
67 * TRANSLATION_NOTE
68 * Only strings passed as arguments to the TRANSLATE macro need to
69 * be translated.
70 */
71
72 #ifndef MNTTYPE_LOFS
73 #define MNTTYPE_LOFS "lofs"
74 #endif
75
76 #define EQ(s1, s2) (strcmp(s1, s2) == 0)
77 #define NEW(type) xmalloc(sizeof (type))
78 #define CLEAR(var) (void) memset(&(var), 0, sizeof (var))
79 #define MAX(a, b) ((a) > (b) ? (a) : (b))
80 #define MAX3(a, b, c) MAX(a, MAX(b, c))
81 #define TRANSLATE(s) new_string(gettext(s))
82
83 #define MAX_OPTIONS 36
84 #define N_FSTYPES 20
85 #define MOUNT_TABLE_ENTRIES 40 /* initial allocation */
86 #define MSGBUF_SIZE 1024
87 #define LINEBUF_SIZE 256 /* either input or output lines */
88
89 #define BLOCK_SIZE 512 /* when reporting in terms of blocks */
90
91 #define DEVNM_CMD "devnm"
92 #define FS_LIBPATH "/usr/lib/fs/"
93 #define MOUNT_TAB "/etc/mnttab"
94 #define VFS_TAB "/etc/vfstab"
95 #define REMOTE_FS "/etc/dfs/fstypes"
96
97 #define NUL '\0'
98 #define FALSE 0
99 #define TRUE 1
100
101 /*
102 * Formatting constants
103 */
104 #define IBCS2_FILESYSTEM_WIDTH 15 /* Truncate to match ISC/SCO */
105 #define IBCS2_MOUNT_POINT_WIDTH 10 /* Truncate to match ISC/SCO */
106 #define FILESYSTEM_WIDTH 20
107 #define MOUNT_POINT_WIDTH 19
108 #define SPECIAL_DEVICE_WIDTH 18
109 #define FSTYPE_WIDTH 8
110 #define BLOCK_WIDTH 8
111 #define NFILES_WIDTH 8
112 #define KBYTE_WIDTH 11
113 #define AVAILABLE_WIDTH 10
114 #define SCALED_WIDTH 6
115 #define CAPACITY_WIDTH 9
116 #define BSIZE_WIDTH 6
117 #define FRAGSIZE_WIDTH 7
118 #define FSID_WIDTH 7
119 #define FLAG_WIDTH 8
120 #define NAMELEN_WIDTH 7
121 #define MNT_SPEC_WIDTH MOUNT_POINT_WIDTH + SPECIAL_DEVICE_WIDTH + 2
122
123 /*
124 * Flags for the errmsg() function
125 */
126 #define ERR_NOFLAGS 0x0
127 #define ERR_NONAME 0x1 /* don't include the program name */
128 /* as a prefix */
129 #define ERR_FATAL 0x2 /* call exit after printing the */
130 /* message */
131 #define ERR_PERROR 0x4 /* append an errno explanation to */
132 /* the message */
133 #define ERR_USAGE 0x8 /* print the usage line after the */
134 /* message */
135
136 #define NUMBER_WIDTH 40
137
138 /*
139 * A numbuf_t is used when converting a number to a string representation
140 */
141 typedef char numbuf_t[ NUMBER_WIDTH ];
142
143 /*
144 * We use bool_int instead of int to make clear which variables are
145 * supposed to be boolean
146 */
147 typedef int bool_int;
148
149 struct mtab_entry {
150 bool_int mte_dev_is_valid;
151 dev_t mte_dev;
152 bool_int mte_ignore; /* the "ignore" option was set */
153 struct extmnttab *mte_mount;
154 };
155
156
157 struct df_request {
158 bool_int dfr_valid;
159 char *dfr_cmd_arg; /* what the user specified */
160 struct mtab_entry *dfr_mte;
161 char *dfr_fstype;
162 int dfr_index; /* to make qsort stable */
163 };
164
165 #define DFR_MOUNT_POINT(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_mountp
166 #define DFR_SPECIAL(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_special
167 #define DFR_FSTYPE(dfrp) (dfrp)->dfr_mte->mte_mount->mnt_fstype
168 #define DFR_ISMOUNTEDFS(dfrp) ((dfrp)->dfr_mte != NULL)
169
170 #define DFRP(p) ((struct df_request *)(p))
171
172 typedef void (*output_func)(struct df_request *, struct statvfs64 *);
173
174 struct df_output {
175 output_func dfo_func; /* function that will do the output */
176 int dfo_flags;
177 };
178
179 /*
180 * Output flags
181 */
182 #define DFO_NOFLAGS 0x0
183 #define DFO_HEADER 0x1 /* output preceded by header */
184 #define DFO_STATVFS 0x2 /* must do a statvfs64(2) */
185
186
187 static char *program_name;
188 static char df_options[MAX_OPTIONS] = "-";
189 static size_t df_options_len = 1;
190 static char *o_option_arg; /* arg to the -o option */
191 static char *FSType;
192 static char *remote_fstypes[N_FSTYPES+1]; /* allocate an extra one */
193 /* to use as a terminator */
194
195 /*
196 * The following three variables support an in-memory copy of the mount table
197 * to speedup searches.
198 */
199 static struct mtab_entry *mount_table; /* array of mtab_entry's */
200 static size_t mount_table_entries;
201 static size_t mount_table_allocated_entries;
202
203 static bool_int F_option;
204 static bool_int V_option;
205 static bool_int P_option; /* Added for XCU4 compliance */
206 static bool_int Z_option;
207 static bool_int v_option;
208 static bool_int a_option;
209 static bool_int b_option;
210 static bool_int e_option;
211 static bool_int g_option;
212 static bool_int h_option;
213 static bool_int k_option;
214 static bool_int l_option;
215 static bool_int m_option;
216 static bool_int n_option;
217 static bool_int t_option;
218 static bool_int o_option;
219
220 static bool_int tty_output;
221 static bool_int use_scaling;
222 static int scale;
223
224 static void usage(void);
225 static void do_devnm(int, char **);
226 static void do_df(int, char **) __NORETURN;
227 static void parse_options(int, char **);
228 static char *basename(char *);
229
230 static libzfs_handle_t *(*_libzfs_init)(void);
231 static zfs_handle_t *(*_zfs_open)(libzfs_handle_t *, const char *, int);
232 static void (*_zfs_close)(zfs_handle_t *);
233 static uint64_t (*_zfs_prop_get_int)(zfs_handle_t *, zfs_prop_t);
234 static libzfs_handle_t *g_zfs;
235
236 /*
237 * Dynamically check for libzfs, in case the user hasn't installed the SUNWzfs
238 * packages. A basic utility such as df shouldn't depend on optional
239 * filesystems.
240 */
241 static boolean_t
load_libzfs(void)242 load_libzfs(void)
243 {
244 void *hdl;
245
246 if (_libzfs_init != NULL)
247 return (g_zfs != NULL);
248
249 if ((hdl = dlopen("libzfs.so", RTLD_LAZY)) != NULL) {
250 _libzfs_init = (libzfs_handle_t *(*)(void))dlsym(hdl,
251 "libzfs_init");
252 _zfs_open = (zfs_handle_t *(*)())dlsym(hdl, "zfs_open");
253 _zfs_close = (void (*)())dlsym(hdl, "zfs_close");
254 _zfs_prop_get_int = (uint64_t (*)())
255 dlsym(hdl, "zfs_prop_get_int");
256
257 if (_libzfs_init != NULL) {
258 assert(_zfs_open != NULL);
259 assert(_zfs_close != NULL);
260 assert(_zfs_prop_get_int != NULL);
261
262 g_zfs = _libzfs_init();
263 }
264 }
265
266 return (g_zfs != NULL);
267 }
268
269 int
main(int argc,char * argv[])270 main(int argc, char *argv[])
271 {
272 (void) setlocale(LC_ALL, "");
273
274 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
275 #define TEXT_DOMAIN "SYS_TEST"
276 #endif
277 (void) textdomain(TEXT_DOMAIN);
278
279 program_name = basename(argv[0]);
280
281 if (EQ(program_name, DEVNM_CMD))
282 do_devnm(argc, argv);
283
284 parse_options(argc, argv);
285
286 /*
287 * The k_option implies SunOS 4.x compatibility: when the special
288 * device name is too long the line will be split except when the
289 * output has been redirected.
290 * This is also valid for the -h option.
291 */
292
293 if (use_scaling || k_option || P_option || v_option)
294 tty_output = isatty(1);
295
296 do_df(argc - optind, &argv[optind]);
297 /* NOTREACHED */
298 }
299
300
301 /*
302 * Prints an error message to stderr.
303 */
304 /* VARARGS2 */
305 static void
errmsg(int flags,char * fmt,...)306 errmsg(int flags, char *fmt, ...)
307 {
308 char buf[MSGBUF_SIZE];
309 va_list ap;
310 int cc;
311 int offset;
312
313 if (flags & ERR_NONAME)
314 offset = 0;
315 else
316 offset = sprintf(buf, "%s: ", program_name);
317
318 va_start(ap, fmt);
319 cc = vsprintf(&buf[offset], gettext(fmt), ap);
320 offset += cc;
321 va_end(ap);
322
323 if (flags & ERR_PERROR) {
324 if (buf[offset-1] != ' ')
325 (void) strcat(buf, " ");
326 (void) strcat(buf, strerror(errno));
327 }
328 (void) fprintf(stderr, "%s\n", buf);
329 if (flags & ERR_USAGE)
330 usage();
331 if (flags & ERR_FATAL)
332 exit(1);
333 }
334
335
336 static void
usage(void)337 usage(void)
338 {
339 errmsg(ERR_NONAME,
340 "Usage: %s [-F FSType] [-abeghklmntPVvZ]"
341 " [-o FSType-specific_options]"
342 " [directory | block_device | resource]", program_name);
343 exit(1);
344 /* NOTREACHED */
345 }
346
347
348 static char *
new_string(char * s)349 new_string(char *s)
350 {
351 char *p = NULL;
352
353 if (s) {
354 p = strdup(s);
355 if (p)
356 return (p);
357 errmsg(ERR_FATAL, "out of memory");
358 /* NOTREACHED */
359 }
360 return (p);
361 }
362
363
364 /*
365 * Allocate memory using malloc but terminate if the allocation fails
366 */
367 static void *
xmalloc(size_t size)368 xmalloc(size_t size)
369 {
370 void *p = malloc(size);
371
372 if (p)
373 return (p);
374 errmsg(ERR_FATAL, "out of memory");
375 /* NOTREACHED */
376 return (NULL);
377 }
378
379
380 /*
381 * Allocate memory using realloc but terminate if the allocation fails
382 */
383 static void *
xrealloc(void * ptr,size_t size)384 xrealloc(void *ptr, size_t size)
385 {
386 void *p = realloc(ptr, size);
387
388 if (p)
389 return (p);
390 errmsg(ERR_FATAL, "out of memory");
391 /* NOTREACHED */
392 return (NULL);
393 }
394
395
396 /*
397 * fopen the specified file for reading but terminate if the fopen fails
398 */
399 static FILE *
xfopen(char * file)400 xfopen(char *file)
401 {
402 FILE *fp = fopen(file, "r");
403
404 if (fp == NULL)
405 errmsg(ERR_FATAL + ERR_PERROR, "failed to open %s:", file);
406 return (fp);
407 }
408
409
410 /*
411 * Read remote file system types from REMOTE_FS into the
412 * remote_fstypes array.
413 */
414 static void
init_remote_fs(void)415 init_remote_fs(void)
416 {
417 FILE *fp;
418 char line_buf[LINEBUF_SIZE];
419 size_t fstype_index = 0;
420
421 if ((fp = fopen(REMOTE_FS, "r")) == NULL) {
422 errmsg(ERR_NOFLAGS,
423 "Warning: can't open %s, ignored", REMOTE_FS);
424 return;
425 }
426
427 while (fgets(line_buf, sizeof (line_buf), fp) != NULL) {
428 char buf[LINEBUF_SIZE];
429
430 (void) sscanf(line_buf, "%s", buf);
431 remote_fstypes[fstype_index++] = new_string(buf);
432
433 if (fstype_index == N_FSTYPES)
434 break;
435 }
436 (void) fclose(fp);
437 }
438
439
440 /*
441 * Returns TRUE if fstype is a remote file system type;
442 * otherwise, returns FALSE.
443 */
444 static int
is_remote_fs(char * fstype)445 is_remote_fs(char *fstype)
446 {
447 char **p;
448 static bool_int remote_fs_initialized;
449
450 if (! remote_fs_initialized) {
451 init_remote_fs();
452 remote_fs_initialized = TRUE;
453 }
454
455 for (p = remote_fstypes; *p; p++)
456 if (EQ(fstype, *p))
457 return (TRUE);
458 return (FALSE);
459 }
460
461
462 static char *
basename(char * s)463 basename(char *s)
464 {
465 char *p = strrchr(s, '/');
466
467 return (p ? p+1 : s);
468 }
469
470
471 /*
472 * Create a new "struct extmnttab" and make sure that its fields point
473 * to malloc'ed memory
474 */
475 static struct extmnttab *
mntdup(struct extmnttab * old)476 mntdup(struct extmnttab *old)
477 {
478 struct extmnttab *new = NEW(struct extmnttab);
479
480 new->mnt_special = new_string(old->mnt_special);
481 new->mnt_mountp = new_string(old->mnt_mountp);
482 new->mnt_fstype = new_string(old->mnt_fstype);
483 new->mnt_mntopts = new_string(old->mnt_mntopts);
484 new->mnt_time = new_string(old->mnt_time);
485 new->mnt_major = old->mnt_major;
486 new->mnt_minor = old->mnt_minor;
487 return (new);
488 }
489
490
491 static void
mtab_error(char * mtab_file,int status)492 mtab_error(char *mtab_file, int status)
493 {
494 if (status == MNT_TOOLONG)
495 errmsg(ERR_NOFLAGS, "a line in %s exceeds %d characters",
496 mtab_file, MNT_LINE_MAX);
497 else if (status == MNT_TOOMANY)
498 errmsg(ERR_NOFLAGS,
499 "a line in %s has too many fields", mtab_file);
500 else if (status == MNT_TOOFEW)
501 errmsg(ERR_NOFLAGS,
502 "a line in %s has too few fields", mtab_file);
503 else
504 errmsg(ERR_NOFLAGS,
505 "error while reading %s: %d", mtab_file, status);
506 exit(1);
507 /* NOTREACHED */
508 }
509
510
511 /*
512 * Read the mount table from the specified file.
513 * We keep the table in memory for faster lookups.
514 */
515 static void
mtab_read_file(void)516 mtab_read_file(void)
517 {
518 char *mtab_file = MOUNT_TAB;
519 FILE *fp;
520 struct extmnttab mtab;
521 int status;
522
523 fp = xfopen(mtab_file);
524
525 resetmnttab(fp);
526 mount_table_allocated_entries = MOUNT_TABLE_ENTRIES;
527 mount_table_entries = 0;
528 mount_table = xmalloc(
529 mount_table_allocated_entries * sizeof (struct mtab_entry));
530
531 while ((status = getextmntent(fp, &mtab, sizeof (struct extmnttab)))
532 == 0) {
533 struct mtab_entry *mtep;
534
535 if (mount_table_entries == mount_table_allocated_entries) {
536 mount_table_allocated_entries += MOUNT_TABLE_ENTRIES;
537 mount_table = xrealloc(mount_table,
538 mount_table_allocated_entries *
539 sizeof (struct mtab_entry));
540 }
541 mtep = &mount_table[mount_table_entries++];
542 mtep->mte_mount = mntdup(&mtab);
543 mtep->mte_dev_is_valid = FALSE;
544 mtep->mte_ignore = (hasmntopt((struct mnttab *)&mtab,
545 MNTOPT_IGNORE) != NULL);
546 }
547
548 (void) fclose(fp);
549
550 if (status == -1) /* reached EOF */
551 return;
552 mtab_error(mtab_file, status);
553 /* NOTREACHED */
554 }
555
556
557 /*
558 * We use this macro when we want to record the option for the purpose of
559 * passing it to the FS-specific df
560 */
561 #define SET_OPTION(opt) opt##_option = TRUE, \
562 df_options[df_options_len++] = arg
563
564 static void
parse_options(int argc,char * argv[])565 parse_options(int argc, char *argv[])
566 {
567 int arg;
568
569 opterr = 0; /* getopt shouldn't complain about unknown options */
570
571 while ((arg = getopt(argc, argv, "F:o:abehkVtgnlmPvZ")) != EOF) {
572 if (arg == 'F') {
573 if (F_option)
574 errmsg(ERR_FATAL + ERR_USAGE,
575 "more than one FSType specified");
576 F_option = 1;
577 FSType = optarg;
578 } else if (arg == 'V' && ! V_option) {
579 V_option = TRUE;
580 } else if (arg == 'v' && ! v_option) {
581 v_option = TRUE;
582 } else if (arg == 'P' && ! P_option) {
583 SET_OPTION(P);
584 } else if (arg == 'a' && ! a_option) {
585 SET_OPTION(a);
586 } else if (arg == 'b' && ! b_option) {
587 SET_OPTION(b);
588 } else if (arg == 'e' && ! e_option) {
589 SET_OPTION(e);
590 } else if (arg == 'g' && ! g_option) {
591 SET_OPTION(g);
592 } else if (arg == 'h') {
593 use_scaling = TRUE;
594 scale = 1024;
595 } else if (arg == 'k' && ! k_option) {
596 SET_OPTION(k);
597 } else if (arg == 'l' && ! l_option) {
598 SET_OPTION(l);
599 } else if (arg == 'm' && ! m_option) {
600 SET_OPTION(m);
601 } else if (arg == 'n' && ! n_option) {
602 SET_OPTION(n);
603 } else if (arg == 't' && ! t_option) {
604 SET_OPTION(t);
605 } else if (arg == 'o') {
606 if (o_option)
607 errmsg(ERR_FATAL + ERR_USAGE,
608 "the -o option can only be specified once");
609 o_option = TRUE;
610 o_option_arg = optarg;
611 } else if (arg == 'Z') {
612 SET_OPTION(Z);
613 } else if (arg == '?') {
614 errmsg(ERR_USAGE, "unknown option: %c", optopt);
615 }
616 }
617
618 /*
619 * Option sanity checks
620 */
621 if (g_option && o_option)
622 errmsg(ERR_FATAL, "-o and -g options are incompatible");
623 if (l_option && o_option)
624 errmsg(ERR_FATAL, "-o and -l options are incompatible");
625 if (n_option && o_option)
626 errmsg(ERR_FATAL, "-o and -n options are incompatible");
627 if (use_scaling && o_option)
628 errmsg(ERR_FATAL, "-o and -h options are incompatible");
629 }
630
631
632
633 /*
634 * Check if the user-specified argument is a resource name.
635 * A resource name is whatever is placed in the mnt_special field of
636 * struct mnttab. In the case of NFS, a resource name has the form
637 * hostname:pathname
638 * We try to find an exact match between the user-specified argument
639 * and the mnt_special field of a mount table entry.
640 * We also use the heuristic of removing the basename from the user-specified
641 * argument and repeating the test until we get a match. This works
642 * fine for NFS but may fail for other remote file system types. However,
643 * it is guaranteed that the function will not fail if the user specifies
644 * the exact resource name.
645 * If successful, this function sets the 'dfr_mte' field of '*dfrp'
646 */
647 static void
resource_mount_entry(struct df_request * dfrp)648 resource_mount_entry(struct df_request *dfrp)
649 {
650 char *name;
651
652 /*
653 * We need our own copy since we will modify the string
654 */
655 name = new_string(dfrp->dfr_cmd_arg);
656
657 for (;;) {
658 char *p;
659 int i;
660
661 /*
662 * Compare against all known mount points.
663 * We start from the most recent mount, which is at the
664 * end of the array.
665 */
666 for (i = mount_table_entries - 1; i >= 0; i--) {
667 struct mtab_entry *mtep = &mount_table[i];
668
669 if (EQ(name, mtep->mte_mount->mnt_special)) {
670 dfrp->dfr_mte = mtep;
671 break;
672 }
673 }
674
675 /*
676 * Remove the last component of the pathname.
677 * If there is no such component, this is not a resource name.
678 */
679 p = strrchr(name, '/');
680 if (p == NULL)
681 break;
682 *p = NUL;
683 }
684 }
685
686
687
688 /*
689 * Try to match the command line argument which is a block special device
690 * with the special device of one of the mounted file systems.
691 * If one is found, set the appropriate field of 'dfrp' to the mount
692 * table entry.
693 */
694 static void
bdev_mount_entry(struct df_request * dfrp)695 bdev_mount_entry(struct df_request *dfrp)
696 {
697 int i;
698 char *special = dfrp->dfr_cmd_arg;
699
700 /*
701 * Compare against all known mount points.
702 * We start from the most recent mount, which is at the
703 * end of the array.
704 */
705 for (i = mount_table_entries - 1; i >= 0; i--) {
706 struct mtab_entry *mtep = &mount_table[i];
707
708 if (EQ(special, mtep->mte_mount->mnt_special)) {
709 dfrp->dfr_mte = mtep;
710 break;
711 }
712 }
713 }
714
715 static struct mtab_entry *
devid_matches(int i,dev_t devno)716 devid_matches(int i, dev_t devno)
717 {
718 struct mtab_entry *mtep = &mount_table[i];
719 struct extmnttab *mtp = mtep->mte_mount;
720 /* int len = strlen(mtp->mnt_mountp); */
721
722 if (EQ(mtp->mnt_fstype, MNTTYPE_SWAP))
723 return (NULL);
724 /*
725 * check if device numbers match. If there is a cached device number
726 * in the mtab_entry, use it, otherwise get the device number
727 * either from the mnttab entry or by stat'ing the mount point.
728 */
729 if (! mtep->mte_dev_is_valid) {
730 struct stat64 st;
731 dev_t dev = NODEV;
732
733 dev = makedev(mtp->mnt_major, mtp->mnt_minor);
734 if (dev == 0)
735 dev = NODEV;
736 if (dev == NODEV) {
737 if (stat64(mtp->mnt_mountp, &st) == -1) {
738 return (NULL);
739 } else {
740 dev = st.st_dev;
741 }
742 }
743 mtep->mte_dev = dev;
744 mtep->mte_dev_is_valid = TRUE;
745 }
746 if (mtep->mte_dev == devno) {
747 return (mtep);
748 }
749 return (NULL);
750 }
751
752 /*
753 * Find the mount point under which the user-specified path resides
754 * and set the 'dfr_mte' field of '*dfrp' to point to the mount table entry.
755 */
756 static void
path_mount_entry(struct df_request * dfrp,dev_t devno)757 path_mount_entry(struct df_request *dfrp, dev_t devno)
758 {
759 char dirpath[MAXPATHLEN];
760 char *dir = dfrp->dfr_cmd_arg;
761 struct mtab_entry *match, *tmatch;
762 int i;
763
764 /*
765 * Expand the given path to get a canonical version (i.e. an absolute
766 * path without symbolic links).
767 */
768 if (realpath(dir, dirpath) == NULL) {
769 errmsg(ERR_PERROR, "cannot canonicalize %s:", dir);
770 return;
771 }
772 /*
773 * If the mnt point is lofs, search from the top of entries from
774 * /etc/mnttab and return the entry that best matches the pathname.
775 * For non-lofs mount points, return the first entry from the bottom
776 * of the entries in /etc/mnttab that matches on the devid field
777 */
778 match = NULL;
779 if (dfrp->dfr_fstype && EQ(dfrp->dfr_fstype, MNTTYPE_LOFS)) {
780 struct extmnttab *entryp;
781 char *path, *mountp;
782 char p, m;
783 int score;
784 int best_score = 0;
785 int best_index = -1;
786
787 for (i = 0; i < mount_table_entries; i++) {
788 entryp = mount_table[i].mte_mount;
789
790 if (!EQ(entryp->mnt_fstype, MNTTYPE_LOFS))
791 continue;
792
793 path = dirpath;
794 mountp = entryp->mnt_mountp;
795 score = 0;
796 /*
797 * Count the number of matching characters
798 * until either path or mountpoint is exhausted
799 */
800 while ((p = *path++) == (m = *mountp++)) {
801 score++;
802
803 if (p == '\0' || m == '\0')
804 break;
805 }
806
807 /* Both exhausted so we have a match */
808 if (p == '\0' && m == '\0') {
809 best_index = i;
810 break;
811 }
812
813 /*
814 * We have exhausted the mountpoint and the current
815 * character in the path is a '/' hence the full path
816 * traverses this mountpoint.
817 * Record this as the best candidate so far.
818 */
819 if (p == '/' && m == '\0') {
820 if (score > best_score) {
821 best_index = i;
822 best_score = score;
823 }
824 }
825 }
826
827 if (best_index > -1)
828 match = &mount_table[best_index];
829 } else {
830 for (i = mount_table_entries - 1; i >= 0; i--) {
831 if (tmatch = devid_matches(i, devno)) {
832 /*
833 * If executing in a zone, there might be lofs
834 * mounts for which the real mount point is
835 * invisible; accept the "best fit" for this
836 * devid.
837 */
838 match = tmatch;
839 if (!EQ(match->mte_mount->mnt_fstype,
840 MNTTYPE_LOFS)) {
841 break;
842 }
843 }
844 }
845 }
846 if (! match) {
847 errmsg(ERR_NOFLAGS,
848 "Could not find mount point for %s", dir);
849 return;
850 }
851 dfrp->dfr_mte = match;
852 }
853
854 /*
855 * Execute a single FS-specific df command for all given requests
856 * Return 0 if successful, 1 otherwise.
857 */
858 static int
run_fs_specific_df(struct df_request request_list[],int entries)859 run_fs_specific_df(struct df_request request_list[], int entries)
860 {
861 int i;
862 int argv_index;
863 char **argv;
864 size_t size;
865 pid_t pid;
866 int status;
867 char cmd_path[MAXPATHLEN];
868 char *fstype;
869
870 if (entries == 0)
871 return (0);
872
873 fstype = request_list[0].dfr_fstype;
874
875 if (F_option && ! EQ(FSType, fstype))
876 return (0);
877
878 (void) sprintf(cmd_path, "%s%s/df", FS_LIBPATH, fstype);
879 /*
880 * Argv entries:
881 * 1 for the path
882 * 2 for -o <options>
883 * 1 for the generic options that we propagate
884 * 1 for the terminating NULL pointer
885 * n for the number of user-specified arguments
886 */
887 size = (5 + entries) * sizeof (char *);
888 argv = xmalloc(size);
889 (void) memset(argv, 0, size);
890
891 argv[0] = cmd_path;
892 argv_index = 1;
893 if (o_option) {
894 argv[argv_index++] = "-o";
895 argv[argv_index++] = o_option_arg;
896 }
897
898 /*
899 * Check if we need to propagate any generic options
900 */
901 if (df_options_len > 1)
902 argv[argv_index++] = df_options;
903
904 /*
905 * If there is a user-specified path, we pass that to the
906 * FS-specific df. Otherwise, we are guaranteed to have a mount
907 * point, since a request without a user path implies that
908 * we are reporting only on mounted file systems.
909 */
910 for (i = 0; i < entries; i++) {
911 struct df_request *dfrp = &request_list[i];
912
913 argv[argv_index++] = (dfrp->dfr_cmd_arg == NULL)
914 ? DFR_MOUNT_POINT(dfrp)
915 : dfrp->dfr_cmd_arg;
916 }
917
918 if (V_option) {
919 for (i = 0; i < argv_index-1; i++)
920 (void) printf("%s ", argv[i]);
921 (void) printf("%s\n", argv[i]);
922 return (0);
923 }
924
925 pid = fork();
926
927 if (pid == -1) {
928 errmsg(ERR_PERROR, "cannot fork process:");
929 return (1);
930 } else if (pid == 0) {
931 (void) execv(cmd_path, argv);
932 if (errno == ENOENT)
933 errmsg(ERR_NOFLAGS,
934 "operation not applicable for FSType %s",
935 fstype);
936 else
937 errmsg(ERR_PERROR, "cannot execute %s:", cmd_path);
938 exit(2);
939 }
940
941 /*
942 * Reap the child
943 */
944 for (;;) {
945 pid_t wpid = waitpid(pid, &status, 0);
946
947 if (wpid == -1)
948 if (errno == EINTR)
949 continue;
950 else {
951 errmsg(ERR_PERROR, "waitpid error:");
952 return (1);
953 }
954 else
955 break;
956 }
957
958 return ((WIFEXITED(status) && WEXITSTATUS(status) == 0) ? 0 : 1);
959 }
960
961
962
963 /*
964 * Remove from the request list all requests that do not apply.
965 * Notice that the subsequent processing of the requests depends on
966 * the sanity checking performed by this function.
967 */
968 static int
prune_list(struct df_request request_list[],size_t n_requests,size_t * valid_requests)969 prune_list(struct df_request request_list[],
970 size_t n_requests,
971 size_t *valid_requests)
972 {
973 size_t i;
974 size_t n_valid = 0;
975 int errors = 0;
976
977 for (i = 0; i < n_requests; i++) {
978 struct df_request *dfrp = &request_list[i];
979
980 /*
981 * Skip file systems that are not mounted if either the
982 * -l or -n options were specified. If none of these options
983 * are present, the appropriate FS-specific df will be invoked.
984 */
985 if (! DFR_ISMOUNTEDFS(dfrp)) {
986 if (l_option || n_option) {
987 errmsg(ERR_NOFLAGS,
988 "%s option incompatible with unmounted "
989 "special device (%s)",
990 l_option ? "-l" : "-n", dfrp->dfr_cmd_arg);
991 dfrp->dfr_valid = FALSE;
992 errors++;
993 }
994 else
995 n_valid++;
996 continue;
997 }
998
999 /*
1000 * Check for inconsistency between the argument of -F and
1001 * the actual file system type.
1002 * If there is an inconsistency and the user specified a
1003 * path, this is an error since we are asked to interpret
1004 * the path using the wrong file system type. If there is
1005 * no path associated with this request, we quietly ignore it.
1006 */
1007 if (F_option && ! EQ(dfrp->dfr_fstype, FSType)) {
1008 dfrp->dfr_valid = FALSE;
1009 if (dfrp->dfr_cmd_arg != NULL) {
1010 errmsg(ERR_NOFLAGS,
1011 "Warning: %s mounted as a %s file system",
1012 dfrp->dfr_cmd_arg, dfrp->dfr_fstype);
1013 errors++;
1014 }
1015 continue;
1016 }
1017
1018 /*
1019 * Skip remote file systems if the -l option is present
1020 */
1021 if (l_option && is_remote_fs(dfrp->dfr_fstype)) {
1022 if (dfrp->dfr_cmd_arg != NULL) {
1023 errmsg(ERR_NOFLAGS,
1024 "Warning: %s is not a local file system",
1025 dfrp->dfr_cmd_arg);
1026 errors++;
1027 }
1028 dfrp->dfr_valid = FALSE;
1029 continue;
1030 }
1031
1032 /*
1033 * Skip file systems mounted as "ignore" unless the -a option
1034 * is present, or the user explicitly specified them on
1035 * the command line.
1036 */
1037 if (dfrp->dfr_mte->mte_ignore &&
1038 ! (a_option || dfrp->dfr_cmd_arg)) {
1039 dfrp->dfr_valid = FALSE;
1040 continue;
1041 }
1042
1043 n_valid++;
1044 }
1045 *valid_requests = n_valid;
1046 return (errors);
1047 }
1048
1049
1050 /*
1051 * Print the appropriate header for the requested output format.
1052 * Options are checked in order of their precedence.
1053 */
1054 static void
print_header(void)1055 print_header(void)
1056 {
1057 if (use_scaling) { /* this comes from the -h option */
1058 int arg = 'h';
1059
1060 (void) printf("%-*s %*s %*s %*s %-*s %s\n",
1061 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1062 SCALED_WIDTH, TRANSLATE("Size"),
1063 SCALED_WIDTH, TRANSLATE("Used"),
1064 AVAILABLE_WIDTH, TRANSLATE("Available"),
1065 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1066 TRANSLATE("Mounted on"));
1067 SET_OPTION(h);
1068 return;
1069 }
1070 if (k_option) {
1071 int arg = 'h';
1072
1073 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1074 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1075 KBYTE_WIDTH, TRANSLATE("1024-blocks"),
1076 KBYTE_WIDTH, TRANSLATE("Used"),
1077 KBYTE_WIDTH, TRANSLATE("Available"),
1078 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1079 TRANSLATE("Mounted on"));
1080 SET_OPTION(h);
1081 return;
1082 }
1083 if (m_option) {
1084 int arg = 'h';
1085
1086 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1087 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1088 KBYTE_WIDTH, TRANSLATE("1M-blocks"),
1089 KBYTE_WIDTH, TRANSLATE("Used"),
1090 KBYTE_WIDTH, TRANSLATE("Available"),
1091 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1092 TRANSLATE("Mounted on"));
1093 SET_OPTION(h);
1094 return;
1095 }
1096 /* Added for XCU4 compliance */
1097 if (P_option) {
1098 int arg = 'h';
1099
1100 (void) printf(gettext("%-*s %*s %*s %*s %-*s %s\n"),
1101 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1102 KBYTE_WIDTH, TRANSLATE("512-blocks"),
1103 KBYTE_WIDTH, TRANSLATE("Used"),
1104 KBYTE_WIDTH, TRANSLATE("Available"),
1105 CAPACITY_WIDTH, TRANSLATE("Capacity"),
1106 TRANSLATE("Mounted on"));
1107
1108 SET_OPTION(h);
1109 return;
1110 }
1111 /* End XCU4 */
1112 if (v_option) {
1113 (void) printf("%-*s %-*s %*s %*s %*s %-*s\n",
1114 IBCS2_MOUNT_POINT_WIDTH, TRANSLATE("Mount Dir"),
1115 IBCS2_FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1116 BLOCK_WIDTH, TRANSLATE("blocks"),
1117 BLOCK_WIDTH, TRANSLATE("used"),
1118 BLOCK_WIDTH, TRANSLATE("free"),
1119 CAPACITY_WIDTH, TRANSLATE(" %used"));
1120 return;
1121 }
1122 if (e_option) {
1123 (void) printf(gettext("%-*s %*s\n"),
1124 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1125 BLOCK_WIDTH, TRANSLATE("ifree"));
1126 return;
1127 }
1128 if (b_option) {
1129 (void) printf(gettext("%-*s %*s\n"),
1130 FILESYSTEM_WIDTH, TRANSLATE("Filesystem"),
1131 BLOCK_WIDTH, TRANSLATE("avail"));
1132 return;
1133 }
1134 }
1135
1136
1137 /*
1138 * Convert an unsigned long long to a string representation and place the
1139 * result in the caller-supplied buffer.
1140 * The given number is in units of "unit_from" size, but the
1141 * converted number will be in units of "unit_to" size. The unit sizes
1142 * must be powers of 2.
1143 * The value "(unsigned long long)-1" is a special case and is always
1144 * converted to "-1".
1145 * Returns a pointer to the caller-supplied buffer.
1146 */
1147 static char *
number_to_string(char * buf,unsigned long long number,int unit_from,int unit_to)1148 number_to_string(
1149 char *buf, /* put the result here */
1150 unsigned long long number, /* convert this number */
1151 int unit_from, /* from units of this size */
1152 int unit_to) /* to units of this size */
1153 {
1154 if ((long long)number == (long long)-1)
1155 (void) strcpy(buf, "-1");
1156 else {
1157 if (unit_from == unit_to)
1158 (void) sprintf(buf, "%llu", number);
1159 else if (unit_from < unit_to)
1160 (void) sprintf(buf, "%llu",
1161 number / (unsigned long long)(unit_to / unit_from));
1162 else
1163 (void) sprintf(buf, "%llu",
1164 number * (unsigned long long)(unit_from / unit_to));
1165 }
1166 return (buf);
1167 }
1168
1169 /*
1170 * Convert an unsigned long long to a string representation and place the
1171 * result in the caller-supplied buffer.
1172 * The given number is in units of "unit_from" size,
1173 * this will first be converted to a number in 1024 or 1000 byte size,
1174 * depending on the scaling factor.
1175 * Then the number is scaled down until it is small enough to be in a good
1176 * human readable format i.e. in the range 0 thru scale-1.
1177 * If it's smaller than 10 there's room enough to provide one decimal place.
1178 * The value "(unsigned long long)-1" is a special case and is always
1179 * converted to "-1".
1180 * Returns a pointer to the caller-supplied buffer.
1181 */
1182 static char *
number_to_scaled_string(numbuf_t buf,unsigned long long number,int unit_from,int scale)1183 number_to_scaled_string(
1184 numbuf_t buf, /* put the result here */
1185 unsigned long long number, /* convert this number */
1186 int unit_from,
1187 int scale)
1188 {
1189 unsigned long long save = 0;
1190 char *M = "KMGTPE"; /* Measurement: kilo, mega, giga, tera, peta, exa */
1191 char *uom = M; /* unit of measurement, initially 'K' (=M[0]) */
1192
1193 if ((long long)number == (long long)-1) {
1194 (void) strcpy(buf, "-1");
1195 return (buf);
1196 }
1197
1198 /*
1199 * Convert number from unit_from to given scale (1024 or 1000).
1200 * This means multiply number by unit_from and divide by scale.
1201 *
1202 * Would like to multiply by unit_from and then divide by scale,
1203 * but if the first multiplication would overflow, then need to
1204 * divide by scale and then multiply by unit_from.
1205 */
1206 if (number > (UINT64_MAX / (unsigned long long)unit_from)) {
1207 number = (number / (unsigned long long)scale) *
1208 (unsigned long long)unit_from;
1209 } else {
1210 number = (number * (unsigned long long)unit_from) /
1211 (unsigned long long)scale;
1212 }
1213
1214 /*
1215 * Now we have number as a count of scale units.
1216 * Stop scaling when we reached exa bytes, then something is
1217 * probably wrong with our number.
1218 */
1219
1220 while ((number >= scale) && (*uom != 'E')) {
1221 uom++; /* next unit of measurement */
1222 save = number;
1223 number = (number + (scale / 2)) / scale;
1224 }
1225 /* check if we should output a decimal place after the point */
1226 if (save && ((save / scale) < 10)) {
1227 /* sprintf() will round for us */
1228 float fnum = (float)save / scale;
1229 (void) sprintf(buf, "%2.1f%c", fnum, *uom);
1230 } else {
1231 (void) sprintf(buf, "%4llu%c", number, *uom);
1232 }
1233 return (buf);
1234 }
1235
1236 /*
1237 * The statvfs() implementation allows us to return only two values, the total
1238 * number of blocks and the number of blocks free. The equation 'used = total -
1239 * free' will not work for ZFS filesystems, due to the nature of pooled storage.
1240 * We choose to return values in the statvfs structure that will produce correct
1241 * results for 'used' and 'available', but not 'total'. This function will open
1242 * the underlying ZFS dataset if necessary and get the real value.
1243 */
1244 static void
adjust_total_blocks(struct df_request * dfrp,fsblkcnt64_t * total,uint64_t blocksize)1245 adjust_total_blocks(struct df_request *dfrp, fsblkcnt64_t *total,
1246 uint64_t blocksize)
1247 {
1248 char *dataset, *slash;
1249 boolean_t first = TRUE;
1250 uint64_t quota = 0;
1251
1252 if (strcmp(DFR_FSTYPE(dfrp), MNTTYPE_ZFS) != 0 || !load_libzfs())
1253 return;
1254
1255 /*
1256 * We want to get the total size for this filesystem as bounded by any
1257 * quotas. In order to do this, we start at the current filesystem and
1258 * work upwards looking for the smallest quota. When we reach the
1259 * pool itself, the quota is the amount used plus the amount
1260 * available.
1261 */
1262 if ((dataset = strdup(DFR_SPECIAL(dfrp))) == NULL)
1263 return;
1264
1265 slash = dataset + strlen(dataset);
1266 while (slash != NULL) {
1267 zfs_handle_t *zhp;
1268 uint64_t this_quota;
1269
1270 *slash = '\0';
1271
1272 zhp = _zfs_open(g_zfs, dataset, ZFS_TYPE_DATASET);
1273 if (zhp == NULL)
1274 break;
1275
1276 /* true at first iteration of loop */
1277 if (first) {
1278 quota = _zfs_prop_get_int(zhp, ZFS_PROP_REFQUOTA);
1279 if (quota == 0)
1280 quota = UINT64_MAX;
1281 first = FALSE;
1282 }
1283
1284 this_quota = _zfs_prop_get_int(zhp, ZFS_PROP_QUOTA);
1285 if (this_quota && this_quota < quota)
1286 quota = this_quota;
1287
1288 /* true at last iteration of loop */
1289 if ((slash = strrchr(dataset, '/')) == NULL) {
1290 uint64_t size;
1291
1292 size = _zfs_prop_get_int(zhp, ZFS_PROP_USED) +
1293 _zfs_prop_get_int(zhp, ZFS_PROP_AVAILABLE);
1294 if (size < quota)
1295 quota = size;
1296 }
1297
1298 _zfs_close(zhp);
1299 }
1300
1301 /*
1302 * Modify total only if we managed to get some stats from libzfs.
1303 */
1304 if (quota != 0)
1305 *total = quota / blocksize;
1306 free(dataset);
1307 }
1308
1309 /*
1310 * The output will appear properly columnized regardless of the names of
1311 * the various fields
1312 */
1313 static void
g_output(struct df_request * dfrp,struct statvfs64 * fsp)1314 g_output(struct df_request *dfrp, struct statvfs64 *fsp)
1315 {
1316 fsblkcnt64_t available_blocks = fsp->f_bavail;
1317 fsblkcnt64_t total_blocks = fsp->f_blocks;
1318 numbuf_t total_blocks_buf;
1319 numbuf_t total_files_buf;
1320 numbuf_t free_blocks_buf;
1321 numbuf_t available_blocks_buf;
1322 numbuf_t free_files_buf;
1323 numbuf_t fname_buf;
1324 char *temp_buf;
1325
1326 #define DEFINE_STR_LEN(var) \
1327 static char *var##_str; \
1328 static size_t var##_len
1329
1330 #define SET_STR_LEN(name, var)\
1331 if (! var##_str) {\
1332 var##_str = TRANSLATE(name); \
1333 var##_len = strlen(var##_str); \
1334 }
1335
1336 DEFINE_STR_LEN(block_size);
1337 DEFINE_STR_LEN(frag_size);
1338 DEFINE_STR_LEN(total_blocks);
1339 DEFINE_STR_LEN(free_blocks);
1340 DEFINE_STR_LEN(available);
1341 DEFINE_STR_LEN(total_files);
1342 DEFINE_STR_LEN(free_files);
1343 DEFINE_STR_LEN(fstype);
1344 DEFINE_STR_LEN(fsys_id);
1345 DEFINE_STR_LEN(fname);
1346 DEFINE_STR_LEN(flag);
1347
1348 /*
1349 * TRANSLATION_NOTE
1350 * The first argument of each of the following macro invocations is a
1351 * string that needs to be translated.
1352 */
1353 SET_STR_LEN("block size", block_size);
1354 SET_STR_LEN("frag size", frag_size);
1355 SET_STR_LEN("total blocks", total_blocks);
1356 SET_STR_LEN("free blocks", free_blocks);
1357 SET_STR_LEN("available", available);
1358 SET_STR_LEN("total files", total_files);
1359 SET_STR_LEN("free files", free_files);
1360 SET_STR_LEN("fstype", fstype);
1361 SET_STR_LEN("filesys id", fsys_id);
1362 SET_STR_LEN("filename length", fname);
1363 SET_STR_LEN("flag", flag);
1364
1365 #define NCOL1_WIDTH (int)MAX3(BLOCK_WIDTH, NFILES_WIDTH, FSTYPE_WIDTH)
1366 #define NCOL2_WIDTH (int)MAX3(BLOCK_WIDTH, FSID_WIDTH, FLAG_WIDTH) + 2
1367 #define NCOL3_WIDTH (int)MAX3(BSIZE_WIDTH, BLOCK_WIDTH, NAMELEN_WIDTH)
1368 #define NCOL4_WIDTH (int)MAX(FRAGSIZE_WIDTH, NFILES_WIDTH)
1369
1370 #define SCOL1_WIDTH (int)MAX3(total_blocks_len, free_files_len, fstype_len)
1371 #define SCOL2_WIDTH (int)MAX3(free_blocks_len, fsys_id_len, flag_len)
1372 #define SCOL3_WIDTH (int)MAX3(block_size_len, available_len, fname_len)
1373 #define SCOL4_WIDTH (int)MAX(frag_size_len, total_files_len)
1374
1375 temp_buf = xmalloc(
1376 MAX(MOUNT_POINT_WIDTH, strlen(DFR_MOUNT_POINT(dfrp)))
1377 + MAX(SPECIAL_DEVICE_WIDTH, strlen(DFR_SPECIAL(dfrp)))
1378 + 20); /* plus slop - nulls & formatting */
1379 (void) sprintf(temp_buf, "%-*s(%-*s):",
1380 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1381 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp));
1382
1383 (void) printf("%-*s %*lu %-*s %*lu %-*s\n",
1384 NCOL1_WIDTH + 1 + SCOL1_WIDTH + 1 + NCOL2_WIDTH + 1 + SCOL2_WIDTH,
1385 temp_buf,
1386 NCOL3_WIDTH, fsp->f_bsize, SCOL3_WIDTH, block_size_str,
1387 NCOL4_WIDTH, fsp->f_frsize, SCOL4_WIDTH, frag_size_str);
1388 free(temp_buf);
1389
1390 /*
1391 * Adjust available_blocks value - it can be less than 0 on
1392 * a 4.x file system. Reset it to 0 in order to avoid printing
1393 * negative numbers.
1394 */
1395 if ((long long)available_blocks < (long long)0)
1396 available_blocks = (fsblkcnt64_t)0;
1397
1398 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1399
1400 (void) printf("%*s %-*s %*s %-*s %*s %-*s %*s %-*s\n",
1401 NCOL1_WIDTH, number_to_string(total_blocks_buf,
1402 total_blocks, fsp->f_frsize, 512),
1403 SCOL1_WIDTH, total_blocks_str,
1404 NCOL2_WIDTH, number_to_string(free_blocks_buf,
1405 fsp->f_bfree, fsp->f_frsize, 512),
1406 SCOL2_WIDTH, free_blocks_str,
1407 NCOL3_WIDTH, number_to_string(available_blocks_buf,
1408 available_blocks, fsp->f_frsize, 512),
1409 SCOL3_WIDTH, available_str,
1410 NCOL4_WIDTH, number_to_string(total_files_buf,
1411 fsp->f_files, 1, 1),
1412 SCOL4_WIDTH, total_files_str);
1413
1414 (void) printf("%*s %-*s %*lu %-*s %s\n",
1415 NCOL1_WIDTH, number_to_string(free_files_buf,
1416 fsp->f_ffree, 1, 1),
1417 SCOL1_WIDTH, free_files_str,
1418 NCOL2_WIDTH, fsp->f_fsid, SCOL2_WIDTH, fsys_id_str,
1419 fsp->f_fstr);
1420
1421 (void) printf("%*s %-*s %#*.*lx %-*s %*s %-*s\n\n",
1422 NCOL1_WIDTH, fsp->f_basetype, SCOL1_WIDTH, fstype_str,
1423 NCOL2_WIDTH, NCOL2_WIDTH-2, fsp->f_flag, SCOL2_WIDTH, flag_str,
1424 NCOL3_WIDTH, number_to_string(fname_buf,
1425 (unsigned long long)fsp->f_namemax, 1, 1),
1426 SCOL3_WIDTH, fname_str);
1427 }
1428
1429
1430 static void
k_output(struct df_request * dfrp,struct statvfs64 * fsp)1431 k_output(struct df_request *dfrp, struct statvfs64 *fsp)
1432 {
1433 fsblkcnt64_t total_blocks = fsp->f_blocks;
1434 fsblkcnt64_t free_blocks = fsp->f_bfree;
1435 fsblkcnt64_t available_blocks = fsp->f_bavail;
1436 fsblkcnt64_t used_blocks;
1437 char *file_system = DFR_SPECIAL(dfrp);
1438 numbuf_t total_blocks_buf;
1439 numbuf_t used_blocks_buf;
1440 numbuf_t available_blocks_buf;
1441 char capacity_buf[LINEBUF_SIZE];
1442
1443 /*
1444 * If the free block count is -1, don't trust anything but the total
1445 * number of blocks.
1446 */
1447 if (free_blocks == (fsblkcnt64_t)-1) {
1448 used_blocks = (fsblkcnt64_t)-1;
1449 (void) strcpy(capacity_buf, " 100%");
1450 } else {
1451 fsblkcnt64_t reserved_blocks = free_blocks - available_blocks;
1452
1453 used_blocks = total_blocks - free_blocks;
1454
1455 /*
1456 * The capacity estimation is bogus when available_blocks is 0
1457 * and the super-user has allocated more space. The reason
1458 * is that reserved_blocks is inaccurate in that case, because
1459 * when the super-user allocates space, free_blocks is updated
1460 * but available_blocks is not (since it can't drop below 0).
1461 *
1462 * XCU4 and POSIX.2 require that any fractional result of the
1463 * capacity estimation be rounded to the next highest integer,
1464 * hence the addition of 0.5.
1465 */
1466 (void) sprintf(capacity_buf, "%5.0f%%",
1467 (total_blocks == 0) ? 0.0 :
1468 ((double)used_blocks /
1469 (double)(total_blocks - reserved_blocks))
1470 * 100.0 + 0.5);
1471 }
1472
1473 /*
1474 * The available_blocks can be less than 0 on a 4.x file system.
1475 * Reset it to 0 in order to avoid printing negative numbers.
1476 */
1477 if ((long long)available_blocks < (long long)0)
1478 available_blocks = (fsblkcnt64_t)0;
1479 /*
1480 * Print long special device names (usually NFS mounts) in a line
1481 * by themselves when the output is directed to a terminal.
1482 */
1483 if (tty_output && strlen(file_system) > (size_t)FILESYSTEM_WIDTH) {
1484 (void) printf("%s\n", file_system);
1485 file_system = "";
1486 }
1487
1488 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1489
1490 if (use_scaling) { /* comes from the -h option */
1491 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1492 FILESYSTEM_WIDTH, file_system,
1493 SCALED_WIDTH, number_to_scaled_string(total_blocks_buf,
1494 total_blocks, fsp->f_frsize, scale),
1495 SCALED_WIDTH, number_to_scaled_string(used_blocks_buf,
1496 used_blocks, fsp->f_frsize, scale),
1497 AVAILABLE_WIDTH, number_to_scaled_string(available_blocks_buf,
1498 available_blocks, fsp->f_frsize, scale),
1499 CAPACITY_WIDTH, capacity_buf,
1500 DFR_MOUNT_POINT(dfrp));
1501 return;
1502 }
1503
1504 if (v_option) {
1505 (void) printf("%-*.*s %-*.*s %*lld %*lld %*lld %-.*s\n",
1506 IBCS2_MOUNT_POINT_WIDTH, IBCS2_MOUNT_POINT_WIDTH,
1507 DFR_MOUNT_POINT(dfrp),
1508 IBCS2_FILESYSTEM_WIDTH, IBCS2_FILESYSTEM_WIDTH, file_system,
1509 BLOCK_WIDTH, total_blocks,
1510 BLOCK_WIDTH, used_blocks,
1511 BLOCK_WIDTH, available_blocks,
1512 CAPACITY_WIDTH, capacity_buf);
1513 return;
1514 }
1515
1516 if (P_option && !k_option && !m_option) {
1517 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1518 FILESYSTEM_WIDTH, file_system,
1519 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1520 total_blocks, fsp->f_frsize, 512),
1521 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1522 used_blocks, fsp->f_frsize, 512),
1523 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1524 available_blocks, fsp->f_frsize, 512),
1525 CAPACITY_WIDTH, capacity_buf,
1526 DFR_MOUNT_POINT(dfrp));
1527 } else if (m_option) {
1528 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1529 FILESYSTEM_WIDTH, file_system,
1530 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1531 total_blocks, fsp->f_frsize, 1024*1024),
1532 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1533 used_blocks, fsp->f_frsize, 1024*1024),
1534 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1535 available_blocks, fsp->f_frsize, 1024*1024),
1536 CAPACITY_WIDTH, capacity_buf,
1537 DFR_MOUNT_POINT(dfrp));
1538 } else {
1539 (void) printf("%-*s %*s %*s %*s %-*s %-s\n",
1540 FILESYSTEM_WIDTH, file_system,
1541 KBYTE_WIDTH, number_to_string(total_blocks_buf,
1542 total_blocks, fsp->f_frsize, 1024),
1543 KBYTE_WIDTH, number_to_string(used_blocks_buf,
1544 used_blocks, fsp->f_frsize, 1024),
1545 KBYTE_WIDTH, number_to_string(available_blocks_buf,
1546 available_blocks, fsp->f_frsize, 1024),
1547 CAPACITY_WIDTH, capacity_buf,
1548 DFR_MOUNT_POINT(dfrp));
1549 }
1550 }
1551
1552 /*
1553 * The following is for internationalization support.
1554 */
1555 static bool_int strings_initialized;
1556 static char *files_str;
1557 static char *blocks_str;
1558 static char *total_str;
1559 static char *kilobytes_str;
1560
1561 static void
strings_init(void)1562 strings_init(void)
1563 {
1564 total_str = TRANSLATE("total");
1565 files_str = TRANSLATE("files");
1566 blocks_str = TRANSLATE("blocks");
1567 kilobytes_str = TRANSLATE("kilobytes");
1568 strings_initialized = TRUE;
1569 }
1570
1571 #define STRINGS_INIT() if (!strings_initialized) strings_init()
1572
1573
1574 static void
t_output(struct df_request * dfrp,struct statvfs64 * fsp)1575 t_output(struct df_request *dfrp, struct statvfs64 *fsp)
1576 {
1577 fsblkcnt64_t total_blocks = fsp->f_blocks;
1578 numbuf_t total_blocks_buf;
1579 numbuf_t total_files_buf;
1580 numbuf_t free_blocks_buf;
1581 numbuf_t free_files_buf;
1582
1583 STRINGS_INIT();
1584
1585 adjust_total_blocks(dfrp, &total_blocks, fsp->f_frsize);
1586
1587 (void) printf("%-*s(%-*s): %*s %s %*s %s\n",
1588 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1589 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1590 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1591 fsp->f_bfree, fsp->f_frsize, 512),
1592 blocks_str,
1593 NFILES_WIDTH, number_to_string(free_files_buf,
1594 fsp->f_ffree, 1, 1),
1595 files_str);
1596 /*
1597 * The total column used to use the same space as the mnt pt & special
1598 * dev fields. However, this doesn't work with massive special dev
1599 * fields * (eg > 500 chars) causing an enormous amount of white space
1600 * before the total column (see bug 4100411). So the code was
1601 * simplified to set the total column at the usual gap.
1602 * This had the side effect of fixing a bug where the previously
1603 * used static buffer was overflowed by the same massive special dev.
1604 */
1605 (void) printf("%*s: %*s %s %*s %s\n",
1606 MNT_SPEC_WIDTH, total_str,
1607 BLOCK_WIDTH, number_to_string(total_blocks_buf,
1608 total_blocks, fsp->f_frsize, 512),
1609 blocks_str,
1610 NFILES_WIDTH, number_to_string(total_files_buf,
1611 fsp->f_files, 1, 1),
1612 files_str);
1613 }
1614
1615
1616 static void
eb_output(struct df_request * dfrp,struct statvfs64 * fsp)1617 eb_output(struct df_request *dfrp, struct statvfs64 *fsp)
1618 {
1619 numbuf_t free_files_buf;
1620 numbuf_t free_kbytes_buf;
1621
1622 STRINGS_INIT();
1623
1624 (void) printf("%-*s(%-*s): %*s %s\n",
1625 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1626 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1627 MAX(KBYTE_WIDTH, NFILES_WIDTH),
1628 number_to_string(free_kbytes_buf,
1629 fsp->f_bfree, fsp->f_frsize, 1024),
1630 kilobytes_str);
1631 (void) printf("%-*s(%-*s): %*s %s\n",
1632 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1633 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1634 MAX(NFILES_WIDTH, NFILES_WIDTH),
1635 number_to_string(free_files_buf, fsp->f_ffree, 1, 1),
1636 files_str);
1637 }
1638
1639
1640 static void
e_output(struct df_request * dfrp,struct statvfs64 * fsp)1641 e_output(struct df_request *dfrp, struct statvfs64 *fsp)
1642 {
1643 numbuf_t free_files_buf;
1644
1645 (void) printf("%-*s %*s\n",
1646 FILESYSTEM_WIDTH, DFR_SPECIAL(dfrp),
1647 NFILES_WIDTH,
1648 number_to_string(free_files_buf, fsp->f_ffree, 1, 1));
1649 }
1650
1651
1652 static void
b_output(struct df_request * dfrp,struct statvfs64 * fsp)1653 b_output(struct df_request *dfrp, struct statvfs64 *fsp)
1654 {
1655 numbuf_t free_blocks_buf;
1656
1657 (void) printf("%-*s %*s\n",
1658 FILESYSTEM_WIDTH, DFR_SPECIAL(dfrp),
1659 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1660 fsp->f_bfree, fsp->f_frsize, 1024));
1661 }
1662
1663
1664 /* ARGSUSED */
1665 static void
n_output(struct df_request * dfrp,struct statvfs64 * fsp)1666 n_output(struct df_request *dfrp, struct statvfs64 *fsp)
1667 {
1668 (void) printf("%-*s: %-*s\n",
1669 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1670 FSTYPE_WIDTH, dfrp->dfr_fstype);
1671 }
1672
1673
1674 static void
default_output(struct df_request * dfrp,struct statvfs64 * fsp)1675 default_output(struct df_request *dfrp, struct statvfs64 *fsp)
1676 {
1677 numbuf_t free_blocks_buf;
1678 numbuf_t free_files_buf;
1679
1680 STRINGS_INIT();
1681
1682 (void) printf("%-*s(%-*s):%*s %s %*s %s\n",
1683 MOUNT_POINT_WIDTH, DFR_MOUNT_POINT(dfrp),
1684 SPECIAL_DEVICE_WIDTH, DFR_SPECIAL(dfrp),
1685 BLOCK_WIDTH, number_to_string(free_blocks_buf,
1686 fsp->f_bfree, fsp->f_frsize, 512),
1687 blocks_str,
1688 NFILES_WIDTH, number_to_string(free_files_buf,
1689 fsp->f_ffree, 1, 1),
1690 files_str);
1691 }
1692
1693
1694 /* ARGSUSED */
1695 static void
V_output(struct df_request * dfrp,struct statvfs64 * fsp)1696 V_output(struct df_request *dfrp, struct statvfs64 *fsp)
1697 {
1698 char temp_buf[LINEBUF_SIZE];
1699
1700 if (df_options_len > 1)
1701 (void) strcat(strcpy(temp_buf, df_options), " ");
1702 else
1703 temp_buf[0] = NUL;
1704
1705 (void) printf("%s -F %s %s%s\n",
1706 program_name, dfrp->dfr_fstype, temp_buf,
1707 dfrp->dfr_cmd_arg ? dfrp->dfr_cmd_arg: DFR_SPECIAL(dfrp));
1708 }
1709
1710
1711 /*
1712 * This function is used to sort the array of df_requests according to fstype
1713 */
1714 static int
df_reqcomp(const void * p1,const void * p2)1715 df_reqcomp(const void *p1, const void *p2)
1716 {
1717 int v = strcmp(DFRP(p1)->dfr_fstype, DFRP(p2)->dfr_fstype);
1718
1719 if (v != 0)
1720 return (v);
1721 else
1722 return (DFRP(p1)->dfr_index - DFRP(p2)->dfr_index);
1723 }
1724
1725
1726 static void
vfs_error(char * file,int status)1727 vfs_error(char *file, int status)
1728 {
1729 if (status == VFS_TOOLONG)
1730 errmsg(ERR_NOFLAGS, "a line in %s exceeds %d characters",
1731 file, MNT_LINE_MAX);
1732 else if (status == VFS_TOOMANY)
1733 errmsg(ERR_NOFLAGS, "a line in %s has too many fields", file);
1734 else if (status == VFS_TOOFEW)
1735 errmsg(ERR_NOFLAGS, "a line in %s has too few fields", file);
1736 else
1737 errmsg(ERR_NOFLAGS, "error while reading %s: %d", file, status);
1738 }
1739
1740
1741 /*
1742 * Try to determine the fstype for the specified block device.
1743 * Return in order of decreasing preference:
1744 * file system type from vfstab
1745 * file system type as specified by -F option
1746 * default file system type
1747 */
1748 static char *
find_fstype(char * special)1749 find_fstype(char *special)
1750 {
1751 struct vfstab vtab;
1752 FILE *fp;
1753 int status;
1754 char *vfstab_file = VFS_TAB;
1755
1756 fp = xfopen(vfstab_file);
1757 status = getvfsspec(fp, &vtab, special);
1758 (void) fclose(fp);
1759 if (status > 0)
1760 vfs_error(vfstab_file, status);
1761
1762 if (status == 0) {
1763 if (F_option && ! EQ(FSType, vtab.vfs_fstype))
1764 errmsg(ERR_NOFLAGS,
1765 "warning: %s is of type %s", special, vtab.vfs_fstype);
1766 return (new_string(vtab.vfs_fstype));
1767 }
1768 else
1769 return (F_option ? FSType : default_fstype(special));
1770 }
1771
1772 /*
1773 * When this function returns, the following fields are filled for all
1774 * valid entries in the requests[] array:
1775 * dfr_mte (if the file system is mounted)
1776 * dfr_fstype
1777 * dfr_index
1778 *
1779 * The function returns the number of errors that occurred while building
1780 * the request list.
1781 */
1782 static int
create_request_list(int argc,char * argv[],struct df_request * requests_p[],size_t * request_count)1783 create_request_list(
1784 int argc,
1785 char *argv[],
1786 struct df_request *requests_p[],
1787 size_t *request_count)
1788 {
1789 struct df_request *requests;
1790 struct df_request *dfrp;
1791 size_t size;
1792 size_t i;
1793 size_t request_index = 0;
1794 size_t max_requests;
1795 int errors = 0;
1796
1797 /*
1798 * If no args, use the mounted file systems, otherwise use the
1799 * user-specified arguments.
1800 */
1801 if (argc == 0) {
1802 mtab_read_file();
1803 max_requests = mount_table_entries;
1804 } else
1805 max_requests = argc;
1806
1807 size = max_requests * sizeof (struct df_request);
1808 requests = xmalloc(size);
1809 (void) memset(requests, 0, size);
1810
1811 if (argc == 0) {
1812 /*
1813 * If -Z wasn't specified, we skip mounts in other
1814 * zones. This obviously is a noop in a non-global
1815 * zone.
1816 */
1817 boolean_t showall = (getzoneid() != GLOBAL_ZONEID) || Z_option;
1818 struct zone_summary *zsp;
1819
1820 if (!showall) {
1821 zsp = fs_get_zone_summaries();
1822 if (zsp == NULL)
1823 errmsg(ERR_FATAL,
1824 "unable to retrieve list of zones");
1825 }
1826
1827 for (i = 0; i < mount_table_entries; i++) {
1828 struct extmnttab *mtp = mount_table[i].mte_mount;
1829
1830 if (EQ(mtp->mnt_fstype, MNTTYPE_SWAP))
1831 continue;
1832
1833 if (!showall) {
1834 if (fs_mount_in_other_zone(zsp,
1835 mtp->mnt_mountp))
1836 continue;
1837 }
1838 dfrp = &requests[request_index++];
1839 dfrp->dfr_mte = &mount_table[i];
1840 dfrp->dfr_fstype = mtp->mnt_fstype;
1841 dfrp->dfr_index = i;
1842 dfrp->dfr_valid = TRUE;
1843 }
1844 } else {
1845 struct stat64 *arg_stat; /* array of stat structures */
1846 bool_int *valid_stat; /* which structures are valid */
1847
1848 arg_stat = xmalloc(argc * sizeof (struct stat64));
1849 valid_stat = xmalloc(argc * sizeof (bool_int));
1850
1851 /*
1852 * Obtain stat64 information for each argument before
1853 * constructing the list of mounted file systems. By
1854 * touching all these places we force the automounter
1855 * to establish any mounts required to access the arguments,
1856 * so that the corresponding mount table entries will exist
1857 * when we look for them.
1858 * It is still possible that the automounter may timeout
1859 * mounts between the time we read the mount table and the
1860 * time we process the request. Even in that case, when
1861 * we issue the statvfs64(2) for the mount point, the file
1862 * system will be mounted again. The only problem will
1863 * occur if the automounter maps change in the meantime
1864 * and the mount point is eliminated.
1865 */
1866 for (i = 0; i < argc; i++)
1867 valid_stat[i] = (stat64(argv[i], &arg_stat[i]) == 0);
1868
1869 mtab_read_file();
1870
1871 for (i = 0; i < argc; i++) {
1872 char *arg = argv[i];
1873
1874 dfrp = &requests[request_index];
1875
1876 dfrp->dfr_index = request_index;
1877 dfrp->dfr_cmd_arg = arg;
1878
1879 if (valid_stat[i]) {
1880 dfrp->dfr_fstype = arg_stat[i].st_fstype;
1881 if (S_ISBLK(arg_stat[i].st_mode)) {
1882 bdev_mount_entry(dfrp);
1883 dfrp->dfr_valid = TRUE;
1884 } else if (S_ISDIR(arg_stat[i].st_mode) ||
1885 S_ISREG(arg_stat[i].st_mode) ||
1886 S_ISFIFO(arg_stat[i].st_mode)) {
1887 path_mount_entry(dfrp,
1888 arg_stat[i].st_dev);
1889 if (! DFR_ISMOUNTEDFS(dfrp)) {
1890 errors++;
1891 continue;
1892 }
1893 dfrp->dfr_valid = TRUE;
1894 }
1895 } else {
1896 resource_mount_entry(dfrp);
1897 dfrp->dfr_valid = DFR_ISMOUNTEDFS(dfrp);
1898 }
1899
1900 /*
1901 * If we haven't managed to verify that the request
1902 * is valid, we must have gotten a bad argument.
1903 */
1904 if (!dfrp->dfr_valid) {
1905 errmsg(ERR_NOFLAGS,
1906 "(%-10s) not a block device, directory or "
1907 "mounted resource", arg);
1908 errors++;
1909 continue;
1910 }
1911
1912 /*
1913 * Determine the file system type.
1914 */
1915 if (DFR_ISMOUNTEDFS(dfrp))
1916 dfrp->dfr_fstype =
1917 dfrp->dfr_mte->mte_mount->mnt_fstype;
1918 else
1919 dfrp->dfr_fstype =
1920 find_fstype(dfrp->dfr_cmd_arg);
1921
1922 request_index++;
1923 }
1924 }
1925 *requests_p = requests;
1926 *request_count = request_index;
1927 return (errors);
1928 }
1929
1930
1931 /*
1932 * Select the appropriate function and flags to use for output.
1933 * Notice that using both -e and -b options produces a different form of
1934 * output than either of those two options alone; this is the behavior of
1935 * the SVR4 df.
1936 */
1937 static struct df_output *
select_output(void)1938 select_output(void)
1939 {
1940 static struct df_output dfo;
1941
1942 /*
1943 * The order of checking options follows the option precedence
1944 * rules as they are listed in the man page.
1945 */
1946 if (use_scaling) { /* comes from the -h option */
1947 dfo.dfo_func = k_output;
1948 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1949 } else if (V_option) {
1950 dfo.dfo_func = V_output;
1951 dfo.dfo_flags = DFO_NOFLAGS;
1952 } else if (g_option) {
1953 dfo.dfo_func = g_output;
1954 dfo.dfo_flags = DFO_STATVFS;
1955 } else if (k_option || m_option || P_option || v_option) {
1956 dfo.dfo_func = k_output;
1957 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1958 } else if (t_option) {
1959 dfo.dfo_func = t_output;
1960 dfo.dfo_flags = DFO_STATVFS;
1961 } else if (b_option && e_option) {
1962 dfo.dfo_func = eb_output;
1963 dfo.dfo_flags = DFO_STATVFS;
1964 } else if (b_option) {
1965 dfo.dfo_func = b_output;
1966 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1967 } else if (e_option) {
1968 dfo.dfo_func = e_output;
1969 dfo.dfo_flags = DFO_HEADER + DFO_STATVFS;
1970 } else if (n_option) {
1971 dfo.dfo_func = n_output;
1972 dfo.dfo_flags = DFO_NOFLAGS;
1973 } else {
1974 dfo.dfo_func = default_output;
1975 dfo.dfo_flags = DFO_STATVFS;
1976 }
1977 return (&dfo);
1978 }
1979
1980
1981 /*
1982 * The (argc,argv) pair contains all the non-option arguments
1983 */
1984 static void
do_df(int argc,char * argv[])1985 do_df(int argc, char *argv[])
1986 {
1987 size_t i;
1988 struct df_request *requests; /* array of requests */
1989 size_t n_requests;
1990 struct df_request *dfrp;
1991 int errors;
1992
1993 errors = create_request_list(argc, argv, &requests, &n_requests);
1994
1995 if (n_requests == 0)
1996 exit(errors);
1997
1998 /*
1999 * If we are going to run the FSType-specific df command,
2000 * rearrange the requests so that we can issue a single command
2001 * per file system type.
2002 */
2003 if (o_option) {
2004 size_t j;
2005
2006 /*
2007 * qsort is not a stable sorting method (i.e. requests of
2008 * the same file system type may be swapped, and hence appear
2009 * in the output in a different order from the one in which
2010 * they were listed in the command line). In order to force
2011 * stability, we use the dfr_index field which is unique
2012 * for each request.
2013 */
2014 qsort(requests,
2015 n_requests, sizeof (struct df_request), df_reqcomp);
2016 for (i = 0; i < n_requests; i = j) {
2017 char *fstype = requests[i].dfr_fstype;
2018
2019 for (j = i+1; j < n_requests; j++)
2020 if (! EQ(fstype, requests[j].dfr_fstype))
2021 break;
2022
2023 /*
2024 * At this point, requests in the range [i,j) are
2025 * of the same type.
2026 *
2027 * If the -F option was used, and the user specified
2028 * arguments, the filesystem types must match
2029 *
2030 * XXX: the alternative of doing this check here is to
2031 * invoke prune_list, but then we have to
2032 * modify this code to ignore invalid requests.
2033 */
2034 if (F_option && ! EQ(fstype, FSType)) {
2035 size_t k;
2036
2037 for (k = i; k < j; k++) {
2038 dfrp = &requests[k];
2039 if (dfrp->dfr_cmd_arg != NULL) {
2040 errmsg(ERR_NOFLAGS,
2041 "Warning: %s mounted as a "
2042 "%s file system",
2043 dfrp->dfr_cmd_arg,
2044 dfrp->dfr_fstype);
2045 errors++;
2046 }
2047 }
2048 } else
2049 errors += run_fs_specific_df(&requests[i], j-i);
2050 }
2051 } else {
2052 size_t valid_requests;
2053
2054 /*
2055 * We have to prune the request list to avoid printing a header
2056 * if there are no valid requests
2057 */
2058 errors += prune_list(requests, n_requests, &valid_requests);
2059
2060 if (valid_requests) {
2061 struct df_output *dfop = select_output();
2062
2063 /* indicates if we already printed out a header line */
2064 int printed_header = 0;
2065
2066 for (i = 0; i < n_requests; i++) {
2067 dfrp = &requests[i];
2068 if (! dfrp->dfr_valid)
2069 continue;
2070
2071 /*
2072 * If we don't have a mount point,
2073 * this must be a block device.
2074 */
2075 if (DFR_ISMOUNTEDFS(dfrp)) {
2076 struct statvfs64 stvfs;
2077
2078 if ((dfop->dfo_flags & DFO_STATVFS) &&
2079 statvfs64(DFR_MOUNT_POINT(dfrp),
2080 &stvfs) == -1) {
2081 errmsg(ERR_PERROR,
2082 "cannot statvfs %s:",
2083 DFR_MOUNT_POINT(dfrp));
2084 errors++;
2085 continue;
2086 }
2087 if ((!printed_header) &&
2088 (dfop->dfo_flags & DFO_HEADER)) {
2089 print_header();
2090 printed_header = 1;
2091 }
2092
2093 (*dfop->dfo_func)(dfrp, &stvfs);
2094 } else {
2095 /*
2096 * -h option only works for
2097 * mounted filesystems
2098 */
2099 if (use_scaling) {
2100 errmsg(ERR_NOFLAGS,
2101 "-h option incompatible with unmounted special device (%s)",
2102 dfrp->dfr_cmd_arg);
2103 errors++;
2104 continue;
2105 }
2106 errors += run_fs_specific_df(dfrp, 1);
2107 }
2108 }
2109 }
2110 }
2111 exit(errors);
2112 }
2113
2114
2115 /*
2116 * The rest of this file implements the devnm command
2117 */
2118
2119 static char *
find_dev_name(char * file,dev_t dev)2120 find_dev_name(char *file, dev_t dev)
2121 {
2122 struct df_request dfreq;
2123
2124 dfreq.dfr_cmd_arg = file;
2125 dfreq.dfr_fstype = 0;
2126 dfreq.dfr_mte = NULL;
2127 path_mount_entry(&dfreq, dev);
2128 return (DFR_ISMOUNTEDFS(&dfreq) ? DFR_SPECIAL(&dfreq) : NULL);
2129 }
2130
2131
2132 static void
do_devnm(int argc,char * argv[])2133 do_devnm(int argc, char *argv[])
2134 {
2135 int arg;
2136 int errors = 0;
2137 char *dev_name;
2138
2139 if (argc == 1)
2140 errmsg(ERR_NONAME, "Usage: %s name ...", DEVNM_CMD);
2141
2142 mtab_read_file();
2143
2144 for (arg = 1; arg < argc; arg++) {
2145 char *file = argv[arg];
2146 struct stat64 st;
2147
2148 if (stat64(file, &st) == -1) {
2149 errmsg(ERR_PERROR, "%s: ", file);
2150 errors++;
2151 continue;
2152 }
2153
2154 if (! is_remote_fs(st.st_fstype) &&
2155 ! EQ(st.st_fstype, MNTTYPE_TMPFS) &&
2156 (dev_name = find_dev_name(file, st.st_dev)))
2157 (void) printf("%s %s\n", dev_name, file);
2158 else
2159 errmsg(ERR_NOFLAGS,
2160 "%s not found", file);
2161 }
2162 exit(errors);
2163 /* NOTREACHED */
2164 }
2165