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root/i-scream/projects/libstatgrab/src/libstatgrab/disk_stats.c

Comparing projects/libstatgrab/src/libstatgrab/disk_stats.c (file contents):
Revision 1.39 by tdb, Mon Nov 10 21:07:04 2003 UTC vs.
Revision 1.59 by ats, Sun Apr 4 23:55:48 2004 UTC

#	Line 1 | Line 1
1	<	/*
1	>	/*
2		* i-scream central monitoring system
3		* http://www.i-scream.org
4	<	* Copyright (C) 2000-2003 i-scream
4	>	* Copyright (C) 2000-2004 i-scream
5		*
6	<	* This program is free software; you can redistribute it and/or
7	<	* modify it under the terms of the GNU General Public License
8	<	* as published by the Free Software Foundation; either version 2
9	<	* of the License, or (at your option) any later version.
6	>	* This library is free software; you can redistribute it and/or
7	>	* modify it under the terms of the GNU Lesser General Public
8	>	* License as published by the Free Software Foundation; either
9	>	* version 2.1 of the License, or (at your option) any later version.
10		*
11	<	* This program is distributed in the hope that it will be useful,
11	>	* This library is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	<	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14	<	* GNU General Public License for more details.
13	>	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14	>	* Lesser General Public License for more details.
15		*
16	<	* You should have received a copy of the GNU General Public License
17	<	* along with this program; if not, write to the Free Software
18	<	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
16	>	* You should have received a copy of the GNU Lesser General Public
17	>	* License along with this library; if not, write to the Free Software
18	>	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19	>	* 02111-1307 USA
20	>	*
21	>	* $Id$
22		*/
23
24		#ifdef HAVE_CONFIG_H
#	Line 25 | Line 28
28		#include <stdio.h>
29		#include <stdlib.h>
30		#include <string.h>
31	+	#include <time.h>
32		#include "statgrab.h"
33	+	#include "vector.h"
34
35		#ifdef SOLARIS
36		#include <sys/mnttab.h>
#	Line 34 | Line 39
39		#define VALID_FS_TYPES {"ufs", "tmpfs"}
40		#endif
41
42	<	#ifdef LINUX
38	<	#include <time.h>
39	<	#include <sys/vfs.h>
42	>	#if defined(LINUX) || defined(CYGWIN)
43		#include <mntent.h>
44	+	#include <sys/vfs.h>
45		#include "tools.h"
46	<	#ifdef CYGWIN
47	<	#define VALID_FS_TYPES {"user"}
48	<	#else
46	>	#endif
47	>
48	>	#ifdef LINUX
49		#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \
50		"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \
51		"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \
52		"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \
53		"umsdos", "vfat", "xfs", "jfs"}
54		#endif
55	+
56	+	#ifdef CYGWIN
57	+	#define VALID_FS_TYPES {"user"}
58		#endif
59
60		#ifdef ALLBSD
#	Line 55 | Line 62
62		#include <sys/ucred.h>
63		#include <sys/mount.h>
64		#endif
65	<	#ifdef FREEBSD
65	>	#if defined(FREEBSD) || defined(DFBSD)
66		#include <sys/dkstat.h>
67		#include <devstat.h>
68		#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \
69		"ufs", "mfs"}
70		#endif
71	<	#ifdef NETBSD
71	>	#if defined(NETBSD) || defined(OPENBSD)
72		#include <sys/param.h>
73		#include <sys/sysctl.h>
74		#include <sys/disk.h>
#	Line 69 | Line 76
76		"ntfs"}
77		#endif
78
79	<	#define START_VAL 1
79	>	static void disk_stat_init(disk_stat_t *d) {
80	>	d->device_name = NULL;
81	>	d->fs_type = NULL;
82	>	d->mnt_point = NULL;
83	>	}
84
85	<	char *copy_string(char *orig_ptr, const char *newtext){
86	<
87	<	/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
88	<	orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
78	<	if(orig_ptr==NULL){
79	<	return NULL;
80	<	}
81	<	strcpy(orig_ptr, newtext);
82	<
83	<	return orig_ptr;
85	>	static void disk_stat_destroy(disk_stat_t *d) {
86	>	free(d->device_name);
87	>	free(d->fs_type);
88	>	free(d->mnt_point);
89		}
90
91	+	int is_valid_fs_type(const char *type) {
92	+	const char *types[] = VALID_FS_TYPES;
93	+	int i;
94
95	<	void init_disk_stat(int start, int end, disk_stat_t *disk_stats){
96	<
97	<	for(disk_stats+=start; start<=end; start++){
98	<	disk_stats->device_name=NULL;
91	<	disk_stats->fs_type=NULL;
92	<	disk_stats->mnt_point=NULL;
93	<
94	<	disk_stats++;
95	>	for (i = 0; i < (sizeof types / sizeof *types); i++) {
96	>	if (strcmp(types[i], type) == 0) {
97	>	return 1;
98	>	}
99		}
100	+	return 0;
101		}
102
103		disk_stat_t *get_disk_stats(int *entries){
104	+	VECTOR_DECLARE_STATIC(disk_stats, disk_stat_t, 10,
105	+	disk_stat_init, disk_stat_destroy);
106
107	<	static disk_stat_t *disk_stats;
101	<	static int watermark=-1;
102	<
103	<	char *fs_types[] = VALID_FS_TYPES;
104	<	int x, valid_type;
107	>	int valid_type;
108		int num_disks=0;
109	<	#if defined(LINUX) || defined (SOLARIS)
109	>	#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN)
110		FILE *f;
111		#endif
112
#	Line 113 | Line 116 | disk_stat_t *get_disk_stats(int *entries){
116		struct mnttab mp;
117		struct statvfs fs;
118		#endif
119	<	#ifdef LINUX
119	>	#if defined(LINUX) || defined(CYGWIN)
120		struct mntent *mp;
121		struct statfs fs;
122		#endif
#	Line 122 | Line 125 | disk_stat_t *get_disk_stats(int *entries){
125		struct statfs *mp;
126		#endif
127
125	–	if(watermark==-1){
126	–	disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
127	–	if(disk_stats==NULL){
128	–	return NULL;
129	–	}
130	–	watermark=START_VAL;
131	–	init_disk_stat(0, watermark-1, disk_stats);
132	–	}
128		#ifdef ALLBSD
129		nummnt=getmntinfo(&mp , MNT_LOCAL);
130		if (nummnt<=0){
131		return NULL;
132		}
133		for(;nummnt--; mp++){
134	<	valid_type=0;
140	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
141	<	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
142	<	valid_type=1;
143	<	break;
144	<	}
145	<	}
134	>	valid_type = is_valid_fs_type(mp->f_fstypename);
135		#endif
136
137	<	#ifdef LINUX
137	>	#if defined(LINUX) || defined(CYGWIN)
138		if ((f=setmntent("/etc/mtab", "r" ))==NULL){
139		return NULL;
140		}
#	Line 155 | Line 144 | disk_stat_t *get_disk_stats(int *entries){
144		continue;
145		}
146
147	<	valid_type=0;
159	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
160	<	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
161	<	valid_type=1;
162	<	break;
163	<	}
164	<	}
147	>	valid_type = is_valid_fs_type(mp->mnt_type);
148		#endif
149
150		#ifdef SOLARIS
#	Line 172 | Line 155 | disk_stat_t *get_disk_stats(int *entries){
155		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
156		continue;
157		}
158	<	valid_type=0;
176	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
177	<	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
178	<	valid_type=1;
179	<	break;
180	<	}
181	<	}
158	>	valid_type = is_valid_fs_type(mp.mnt_fstype);
159		#endif
160
161		if(valid_type){
162	<	if(num_disks>watermark-1){
163	<	disk_ptr=disk_stats;
187	<	if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
188	<	disk_stats=disk_ptr;
189	<	return NULL;
190	<	}
191	<
192	<	watermark=watermark*2;
193	<	init_disk_stat(num_disks, watermark-1, disk_stats);
162	>	if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) {
163	>	return NULL;
164		}
195	–
165		disk_ptr=disk_stats+num_disks;
166	+
167		#ifdef ALLBSD
168	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
168	>	if (update_string(&disk_ptr->device_name, mp->f_mntfromname) == NULL) {
169		return NULL;
170		}
171	<
202	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
171	>	if (update_string(&disk_ptr->fs_type, mp->f_fstypename) == NULL) {
172		return NULL;
173		}
174	<
206	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
174	>	if (update_string(&disk_ptr->mnt_point, mp->f_mntonname) == NULL) {
175		return NULL;
176		}
177
#	Line 216 | Line 184 | disk_stat_t *get_disk_stats(int *entries){
184		/* Freebsd doesn't have a "available" inodes */
185		disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
186		#endif
187	<	#ifdef LINUX
188	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
187	>	#if defined(LINUX) || defined(CYGWIN)
188	>	if (update_string(&disk_ptr->device_name, mp->mnt_fsname) == NULL) {
189		return NULL;
190		}
191
192	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
192	>	if (update_string(&disk_ptr->fs_type, mp->mnt_type) == NULL) {
193		return NULL;
194		}
195
196	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
196	>	if (update_string(&disk_ptr->mnt_point, mp->mnt_dir) == NULL) {
197		return NULL;
198		}
199		disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
#	Line 239 | Line 207 | disk_stat_t *get_disk_stats(int *entries){
207		#endif
208
209		#ifdef SOLARIS
242	–	/* Memory leak in event of realloc failing */
210		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
211		* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
212		* be upwards of a k each
213		*/
214	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
214	>	if (update_string(&disk_ptr->device_name, mp.mnt_special) == NULL) {
215		return NULL;
216		}
217
218	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
218	>	if (update_string(&disk_ptr->fs_type, mp.mnt_fstype) == NULL) {
219		return NULL;
220		}
221
222	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
222	>	if (update_string(&disk_ptr->mnt_point, mp.mnt_mountp) == NULL) {
223		return NULL;
224		}
225
#	Line 272 | Line 239 | disk_stat_t *get_disk_stats(int *entries){
239
240		/* If this fails, there is very little i can do about it, so
241		I'll ignore it :) */
242	<	#if defined(LINUX)
242	>	#if defined(LINUX) || defined(CYGWIN)
243		endmntent(f);
244		#endif
245		#if defined(SOLARIS)
#	Line 282 | Line 249 | disk_stat_t *get_disk_stats(int *entries){
249		return disk_stats;
250
251		}
285	–	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
252
253	<	for(diskio_stats+=start; start<end; start++){
254	<	diskio_stats->disk_name=NULL;
289	<
290	<	diskio_stats++;
291	<	}
253	>	static void diskio_stat_init(diskio_stat_t *d) {
254	>	d->disk_name = NULL;
255		}
256
257	<	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
258	<
296	<	if(diskio_stats==NULL){
297	<
298	<	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
299	<	return NULL;
300	<	}
301	<	diskio_stat_init(0, needed_entries, diskio_stats);
302	<	*cur_entries=needed_entries;
303	<
304	<	return diskio_stats;
305	<	}
306	<
307	<
308	<	if(*cur_entries<needed_entries){
309	<	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
310	<	if(diskio_stats==NULL){
311	<	return NULL;
312	<	}
313	<	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
314	<	*cur_entries=needed_entries;
315	<	}
316	<
317	<	return diskio_stats;
257	>	static void diskio_stat_destroy(diskio_stat_t *d) {
258	>	free(d->disk_name);
259		}
260
261	<	static diskio_stat_t *diskio_stats=NULL;
262	<	static int num_diskio=0;
261	>	VECTOR_DECLARE_STATIC(diskio_stats, diskio_stat_t, 10,
262	>	diskio_stat_init, diskio_stat_destroy);
263
264		#ifdef LINUX
265		typedef struct {
#	Line 328 | Line 269 | typedef struct {
269		#endif
270
271		diskio_stat_t *get_diskio_stats(int *entries){
272	<
332	<	static int sizeof_diskio_stats=0;
272	>	int num_diskio;
273		#ifndef LINUX
274		diskio_stat_t *diskio_stats_ptr;
275		#endif
#	Line 344 | Line 284 | diskio_stat_t *get_diskio_stats(int *entries){
284		char *line_ptr;
285		int major, minor;
286		int has_pp_stats = 1;
287	<	static partition *parts = NULL;
348	<	static int alloc_parts = 0;
287	>	VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL);
288		int i, n;
289		time_t now;
290		const char *format;
291		#endif
292	<	#ifdef FREEBSD
292	>	#if defined(FREEBSD) || defined(DFBSD)
293		static struct statinfo stats;
294		static int stats_init = 0;
295		int counter;
#	Line 361 | Line 300 | diskio_stat_t *get_diskio_stats(int *entries){
300		#endif
301		#ifdef NETBSD
302		struct disk_sysctl *stats;
303	+	#endif
304	+	#ifdef OPENBSD
305	+	int diskcount;
306	+	char *disknames, *name, *bufpp;
307	+	char **dk_name;
308	+	struct diskstats *stats;
309	+	#endif
310	+	#ifdef NETBSD
311	+	#define MIBSIZE 3
312	+	#endif
313	+	#ifdef OPENBSD
314	+	#define MIBSIZE 2
315	+	#endif
316	+	#if defined(NETBSD) || defined(OPENBSD)
317		int num_disks, i;
318	<	int mib[3];
318	>	int mib[MIBSIZE];
319		size_t size;
320		#endif
321
322		num_diskio=0;
323
324	<	#ifdef NETBSD
324	>	#ifdef OPENBSD
325		mib[0] = CTL_HW;
326	+	mib[1] = HW_DISKCOUNT;
327	+
328	+	size = sizeof(diskcount);
329	+	if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) {
330	+	return NULL;
331	+	}
332	+
333	+	mib[0] = CTL_HW;
334	+	mib[1] = HW_DISKNAMES;
335	+
336	+	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
337	+	return NULL;
338	+	}
339	+
340	+	disknames = malloc(size);
341	+	if (disknames == NULL) {
342	+	return NULL;
343	+	}
344	+
345	+	if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) {
346	+	return NULL;
347	+	}
348	+
349	+	dk_name = calloc(diskcount, sizeof(char *));
350	+	bufpp = disknames;
351	+	for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) {
352	+	dk_name[i] = name;
353	+	}
354	+	#endif
355	+
356	+	#if defined(NETBSD) || defined(OPENBSD)
357	+	mib[0] = CTL_HW;
358		mib[1] = HW_DISKSTATS;
359	+	#ifdef NETBSD
360		mib[2] = sizeof(struct disk_sysctl);
361	+	#endif
362
363	<	if (sysctl(mib, 3, NULL, &size, NULL, 0) < 0) {
363	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
364		return NULL;
365		}
366	+
367	+	#ifdef NETBSD
368		num_disks = size / sizeof(struct disk_sysctl);
369	+	#else
370	+	num_disks = size / sizeof(struct diskstats);
371	+	#endif
372
373		stats = malloc(size);
374		if (stats == NULL) {
375		return NULL;
376		}
377
378	<	if (sysctl(mib, 3, stats, &size, NULL, 0) < 0) {
378	>	if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) {
379		return NULL;
380		}
381
382		for (i = 0; i < num_disks; i++) {
383		u_int64_t rbytes, wbytes;
384
385	+	#ifdef NETBSD
386		#ifdef HAVE_DK_RBYTES
387		rbytes = stats[i].dk_rbytes;
388		wbytes = stats[i].dk_wbytes;
#	Line 397 | Line 390 | diskio_stat_t *get_diskio_stats(int *entries){
390		/* Before 1.7, NetBSD merged reads and writes. */
391		rbytes = wbytes = stats[i].dk_bytes;
392		#endif
393	+	#else
394	+	rbytes = wbytes = stats[i].ds_bytes;
395	+	#endif
396
397		/* Don't keep stats for disks that have never been used. */
398		if (rbytes == 0 && wbytes == 0) {
399		continue;
400		}
401
402	<	diskio_stats = diskio_stat_malloc(num_diskio + 1,
407	<	&sizeof_diskio_stats,
408	<	diskio_stats);
409	<	if (diskio_stats == NULL) {
402	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
403		return NULL;
404		}
405		diskio_stats_ptr = diskio_stats + num_diskio;
#	Line 416 | Line 409 | diskio_stat_t *get_diskio_stats(int *entries){
409		if (diskio_stats_ptr->disk_name != NULL) {
410		free(diskio_stats_ptr->disk_name);
411		}
412	+	#ifdef NETBSD
413		diskio_stats_ptr->disk_name = strdup(stats[i].dk_name);
414	+	#else
415	+	diskio_stats_ptr->disk_name = strdup(dk_name[i]);
416	+	#endif
417		diskio_stats_ptr->systime = time(NULL);
418
419		num_diskio++;
420		}
421
422		free(stats);
423	+	#ifdef OPENBSD
424	+	free(dk_name);
425	+	free(disknames);
426		#endif
427	+	#endif
428
429	<	#ifdef FREEBSD
429	>	#if defined(FREEBSD) || defined(DFBSD)
430		if (!stats_init) {
431		stats.dinfo=malloc(sizeof(struct devinfo));
432		if(stats.dinfo==NULL) return NULL;
#	Line 460 | Line 461 | diskio_stat_t *get_diskio_stats(int *entries){
461		#else
462		if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
463		#endif
464	<	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
464	>
465	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
466		return NULL;
467		}
468		diskio_stats_ptr=diskio_stats+num_diskio;
#	Line 495 | Line 497 | diskio_stat_t *get_diskio_stats(int *entries){
497		if((kstat_read(kc, ksp, &kios))==-1){
498		}
499
500	<	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
500	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
501		kstat_close(kc);
502		return NULL;
503		}
#	Line 507 | Line 509 | diskio_stat_t *get_diskio_stats(int *entries){
509
510		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
511
512	<	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
512	>	diskio_stats_ptr->disk_name=strdup((char *) get_svr_from_bsd(ksp->ks_name));
513		diskio_stats_ptr->systime=time(NULL);
514		num_diskio++;
515		}
#	Line 526 | Line 528 | diskio_stat_t *get_diskio_stats(int *entries){
528		the same format. */
529
530		f = fopen("/proc/diskstats", "r");
531	<	format = " %d %d %19s %*d %*d %lld %*d %*d %*d %lld";
531	>	format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld";
532		if (f == NULL) {
533		f = fopen("/proc/partitions", "r");
534	<	format = " %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld";
534	>	format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld";
535		}
536		if (f == NULL) goto out;
537		now = time(NULL);
538
539		while ((line_ptr = f_read_line(f, "")) != NULL) {
540	<	char name[20];
540	>	char name[100];
541		char *s;
542		long long rsect, wsect;
543
#	Line 556 | Line 558 | diskio_stat_t *get_diskio_stats(int *entries){
558		wsect = 0;
559		}
560
561	<	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
562	<	diskio_stats);
561	<	if (diskio_stats == NULL) goto out;
562	<	if (n >= alloc_parts) {
563	<	alloc_parts += 16;
564	<	parts = realloc(parts, alloc_parts * sizeof *parts);
565	<	if (parts == NULL) {
566	<	alloc_parts = 0;
567	<	goto out;
568	<	}
561	>	if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) {
562	>	goto out;
563		}
564	+	if (VECTOR_RESIZE(parts, n + 1) < 0) {
565	+	goto out;
566	+	}
567
568		if (diskio_stats[n].disk_name != NULL)
569		free(diskio_stats[n].disk_name);
#	Line 580 | Line 577 | diskio_stat_t *get_diskio_stats(int *entries){
577		n++;
578		}
579
580	+	fclose(f);
581	+	f = NULL;
582	+
583		if (!has_pp_stats) {
584	<	/* This is an older kernel without stats in /proc/partitions.
585	<	Read what we can from /proc/stat instead. */
584	>	/* This is an older kernel where /proc/partitions doesn't
585	>	contain stats. Read what we can from /proc/stat instead, and
586	>	fill in the appropriate bits of the list allocated above. */
587
588		f = fopen("/proc/stat", "r");
589		if (f == NULL) goto out;
#	Line 649 | Line 650 | diskio_stat_t *get_diskio_stats(int *entries){
650		num_diskio = n;
651		out:
652		if (f != NULL) fclose(f);
653	+	#endif
654
655	+	#ifdef CYGWIN
656	+	return NULL;
657		#endif
658	+
659		*entries=num_diskio;
660
661		return diskio_stats;
662		}
663
664		diskio_stat_t *get_diskio_stats_diff(int *entries){
665	<	static diskio_stat_t *diskio_stats_diff=NULL;
666	<	static int sizeof_diskio_stats_diff=0;
667	<	diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
668	<	int disks, x, y;
665	>	VECTOR_DECLARE_STATIC(diff, diskio_stat_t, 1,
666	>	diskio_stat_init, diskio_stat_destroy);
667	>	diskio_stat_t *src = NULL, *dest;
668	>	int i, j, diff_count, new_count;
669
670	<	if(diskio_stats==NULL){
671	<	diskio_stats_ptr=get_diskio_stats(&disks);
672	<	*entries=disks;
668	<	return diskio_stats_ptr;
670	>	if (diskio_stats == NULL) {
671	>	/* No previous stats, so we can't calculate a difference. */
672	>	return get_diskio_stats(entries);
673		}
674
675	<	diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
676	<	if(diskio_stats_diff==NULL){
675	>	/* Resize the results array to match the previous stats. */
676	>	diff_count = VECTOR_SIZE(diskio_stats);
677	>	if (VECTOR_RESIZE(diff, diff_count) < 0) {
678		return NULL;
679		}
680
681	<	diskio_stats_diff_ptr=diskio_stats_diff;
682	<	diskio_stats_ptr=diskio_stats;
681	>	/* Copy the previous stats into the result. */
682	>	for (i = 0; i < diff_count; i++) {
683	>	src = &diskio_stats[i];
684	>	dest = &diff[i];
685
686	<	for(disks=0;disks<num_diskio;disks++){
687	<	if(diskio_stats_diff_ptr->disk_name!=NULL){
681	<	free(diskio_stats_diff_ptr->disk_name);
686	>	if (dest->disk_name != NULL) {
687	>	free(dest->disk_name);
688		}
689	<	diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
690	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
691	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
692	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
689	>	dest->disk_name = strdup(src->disk_name);
690	>	dest->read_bytes = src->read_bytes;
691	>	dest->write_bytes = src->write_bytes;
692	>	dest->systime = src->systime;
693	>	}
694
695	<	diskio_stats_diff_ptr++;
696	<	diskio_stats_ptr++;
695	>	/* Get a new set of stats. */
696	>	if (get_diskio_stats(&new_count) == NULL) {
697	>	return NULL;
698		}
699
700	<	diskio_stats_ptr=get_diskio_stats(&disks);
701	<	diskio_stats_diff_ptr=diskio_stats_diff;
700	>	/* For each previous stat... */
701	>	for (i = 0; i < diff_count; i++) {
702	>	dest = &diff[i];
703
704	<	for(x=0;x<sizeof_diskio_stats_diff;x++){
705	<
706	<	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
707	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
708	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
709	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
710	<	}else{
702	<	diskio_stats_ptr=diskio_stats;
703	<	for(y=0;y<disks;y++){
704	<	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
705	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
706	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
707	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
708	<
709	<	break;
710	<	}
711	<
712	<	diskio_stats_ptr++;
704	>	/* ... find the corresponding new stat ... */
705	>	for (j = 0; j < new_count; j++) {
706	>	/* Try the new stat in the same position first,
707	>	since that's most likely to be it. */
708	>	src = &diskio_stats[(i + j) % new_count];
709	>	if (strcmp(src->disk_name, dest->disk_name) == 0) {
710	>	break;
711		}
712		}
713	+	if (j == new_count) {
714	+	/* No match found. */
715	+	continue;
716	+	}
717
718	<	diskio_stats_ptr++;
719	<	diskio_stats_diff_ptr++;
720	<
718	>	/* ... and subtract the previous stat from it to get the
719	>	difference. */
720	>	dest->read_bytes = src->read_bytes - dest->read_bytes;
721	>	dest->write_bytes = src->write_bytes - dest->write_bytes;
722	>	dest->systime = src->systime - dest->systime;
723		}
724	<
725	<	*entries=sizeof_diskio_stats_diff;
726	<	return diskio_stats_diff;
724	>
725	>	*entries = diff_count;
726	>	return diff;
727		}
728	+

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