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

Comparing projects/libstatgrab/src/libstatgrab/tools.c (file contents):
Revision 1.1 by pajs, Tue Mar 4 18:07:42 2003 UTC vs.
Revision 1.62 by ats, Sun Nov 7 12:34:24 2004 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream libstatgrab
3	+	* http://www.i-scream.org
4	+	* Copyright (C) 2000-2004 i-scream
5	+	*
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 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 GNU
14	+	* Lesser General Public License for more details.
15	+	*
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
25	+	#include "config.h"
26	+	#endif
27	+
28		#include <stdio.h>
29		#include <string.h>
30	+	#include <stdlib.h>
31	+	#include <unistd.h>
32	+	#include <sys/types.h>
33	+	#ifdef ALLBSD
34	+	#include <fcntl.h>
35	+	#endif
36	+	#if (defined(FREEBSD) && !defined(FREEBSD5)) || defined(DFBSD)
37	+	#include <kvm.h>
38	+	#include <paths.h>
39	+	#endif
40	+	#if defined(NETBSD) || defined(OPENBSD)
41	+	#include <uvm/uvm_extern.h>
42	+	#include <sys/param.h>
43	+	#include <sys/sysctl.h>
44	+	#endif
45	+	#ifdef HPUX
46	+	#include <sys/param.h>
47	+	#include <sys/pstat.h>
48	+	#endif
49
50	<	char *f_read_line(FILE *f, const char *string){
50	>	#include "tools.h"
51	>	#include "statgrab.h"
52	>
53	>	#ifdef SOLARIS
54	>	#ifdef HAVE_LIBDEVINFO_H
55	>	#include <libdevinfo.h>
56	>	#endif
57	>	#include <kstat.h>
58	>	#include <unistd.h>
59	>	#include <ctype.h>
60	>	#include <sys/types.h>
61	>	#include <sys/dkio.h>
62	>	#include <sys/stat.h>
63	>	#include <fcntl.h>
64	>	#include <sys/fcntl.h>
65	>	#include <dirent.h>
66	>	#endif
67	>
68	>	#if defined(SOLARIS) && defined(HAVE_LIBDEVINFO_H)
69	>	struct map{
70	>	char *bsd;
71	>	char *svr;
72	>
73	>	struct map *next;
74	>	};
75	>	typedef struct map mapping_t;
76	>
77	>	static mapping_t *mapping = NULL;
78	>	#endif
79	>
80	>	#ifdef SOLARIS
81	>	const char *sg_get_svr_from_bsd(const char *bsd){
82	>	#ifdef HAVE_LIBDEVINFO_H
83	>	mapping_t *map_ptr;
84	>	for(map_ptr = mapping; map_ptr != NULL; map_ptr = map_ptr->next)
85	>	if(!strcmp(map_ptr->bsd, bsd)) return map_ptr->svr;
86	>	#endif
87	>	return bsd;
88	>	}
89	>	#endif
90	>
91	>	#if defined(SOLARIS) && defined(HAVE_LIBDEVINFO_H)
92	>	static void add_mapping(char *bsd, char *svr){
93	>	mapping_t *map_ptr;
94	>	mapping_t *map_end_ptr;
95	>
96	>	if (mapping == NULL){
97	>	mapping = sg_malloc(sizeof(mapping_t));
98	>	if (mapping == NULL) return;
99	>	map_ptr = mapping;
100	>	}else{
101	>	/* See if its already been added */
102	>	for(map_ptr = mapping; map_ptr != NULL; map_ptr = map_ptr->next){
103	>	if( (!strcmp(map_ptr->bsd, bsd)) || (!strcmp(map_ptr->svr, svr)) ){
104	>	return;
105	>	}
106	>	map_end_ptr = map_ptr;
107	>	}
108	>
109	>	/* We've reached end of list and not found the entry.. So we need to malloc
110	>	* new mapping_t
111	>	*/
112	>	map_end_ptr->next = sg_malloc(sizeof(mapping_t));
113	>	if (map_end_ptr->next == NULL) return;
114	>	map_ptr = map_end_ptr->next;
115	>	}
116	>
117	>	map_ptr->next = NULL;
118	>	map_ptr->bsd = NULL;
119	>	map_ptr->svr = NULL;
120	>	if (sg_update_string(&map_ptr->bsd, bsd) < 0
121	>	|| sg_update_string(&map_ptr->svr, svr) < 0) {
122	>	return;
123	>	}
124	>
125	>	return;
126	>	}
127	>
128	>
129	>	static char *read_dir(char *disk_path){
130	>	DIR *dirp;
131	>	struct dirent *dp;
132	>	struct stat stbuf;
133	>	char *svr_name = NULL;
134	>	char current_dir[MAXPATHLEN];
135	>	char file_name[MAXPATHLEN];
136	>	char temp_name[MAXPATHLEN];
137	>	char dir_dname[MAXPATHLEN];
138	>	char *dsk_dir;
139	>	int x;
140	>
141	>	dsk_dir = "/dev/osa/dev/dsk";
142	>	strncpy(current_dir, dsk_dir, sizeof current_dir);
143	>	if ((dirp = opendir(current_dir)) == NULL){
144	>	dsk_dir = "/dev/dsk";
145	>	snprintf(current_dir, sizeof current_dir, "%s", dsk_dir);
146	>	if ((dirp = opendir(current_dir)) == NULL){
147	>	return NULL;
148	>	}
149	>	}
150	>
151	>	while ((dp = readdir(dirp)) != NULL){
152	>	snprintf(temp_name, sizeof temp_name, "../..%s", disk_path);
153	>	snprintf(dir_dname, sizeof dir_dname, "%s/%s", dsk_dir, dp->d_name);
154	>	stat(dir_dname,&stbuf);
155	>
156	>	if (S_ISBLK(stbuf.st_mode)){
157	>	x = readlink(dir_dname, file_name, sizeof(file_name));
158	>	file_name[x] = '\0';
159	>	if (strcmp(file_name, temp_name) == 0) {
160	>	if (sg_update_string(&svr_name,
161	>	dp->d_name) < 0) {
162	>	return NULL;
163	>	}
164	>	closedir(dirp);
165	>	return svr_name;
166	>	}
167	>	}
168	>	}
169	>	closedir(dirp);
170	>	return NULL;
171	>	}
172	>
173	>
174	>	static int get_alias(char *alias){
175	>	char file[MAXPATHLEN];
176	>	di_node_t root_node;
177	>	di_node_t node;
178	>	di_minor_t minor = DI_MINOR_NIL;
179	>	char tmpnode[MAXPATHLEN];
180	>	char *phys_path;
181	>	char *minor_name;
182	>	char *value;
183	>	int instance;
184	>	if ((root_node = di_init("/", DINFOCPYALL)) == DI_NODE_NIL) {
185	>	return -1;
186	>	}
187	>	node = di_drv_first_node(alias, root_node);
188	>	while (node != DI_NODE_NIL) {
189	>	if ((minor = di_minor_next(node, DI_MINOR_NIL)) != DI_MINOR_NIL) {
190	>	instance = di_instance(node);
191	>	phys_path = di_devfs_path(node);
192	>	minor_name = di_minor_name(minor);
193	>	strcpy(tmpnode, alias);
194	>	sprintf(tmpnode, "%s%d", tmpnode, instance);
195	>	sg_strlcpy(file, "/devices", sizeof file);
196	>	sg_strlcat(file, phys_path, sizeof file);
197	>	sg_strlcat(file, ":", sizeof file);
198	>	sg_strlcat(file, minor_name, sizeof file);
199	>	value = read_dir(file);
200	>	if (value != NULL){
201	>	add_mapping(tmpnode, value);
202	>	}
203	>	di_devfs_path_free(phys_path);
204	>	node = di_drv_next_node(node);
205	>	}else{
206	>	node = di_drv_next_node(node);
207	>	}
208	>	}
209	>	di_fini(root_node);
210	>	return 0;
211	>	}
212	>
213	>
214	>	#define BIG_ENOUGH 512
215	>	static int build_mapping(){
216	>	char device_name[BIG_ENOUGH];
217	>	int x;
218	>	kstat_ctl_t *kc;
219	>	kstat_t *ksp;
220	>	kstat_io_t kios;
221	>
222	>	char driver_list[BIG_ENOUGH][BIG_ENOUGH];
223	>	int list_entries = 0;
224	>	int found;
225	>
226	>	if ((kc = kstat_open()) == NULL) {
227	>	return -1;
228	>	}
229	>
230	>	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
231	>	if (!strcmp(ksp->ks_class, "disk")) {
232	>	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
233	>	/* We dont want metadevices appearing as num_diskio */
234	>	if(strcmp(ksp->ks_module, "md")==0) continue;
235	>	if((kstat_read(kc, ksp, &kios))==-1) continue;
236	>	strncpy(device_name, ksp->ks_name, sizeof device_name);
237	>	for(x=0;x<(int)(sizeof device_name);x++){
238	>	if( isdigit((int)device_name[x]) ) break;
239	>	}
240	>	if(x == sizeof device_name) x--;
241	>	device_name[x] = '\0';
242	>
243	>	/* Check if we've not already looked it up */
244	>	found = 0;
245	>	for(x=0;x<list_entries;x++){
246	>	if (x>=BIG_ENOUGH){
247	>	/* We've got bigger than we thought was massive */
248	>	/* If we hit this.. Make big enough bigger */
249	>	return -1;
250	>	}
251	>	if( !strncmp(driver_list[x], device_name, BIG_ENOUGH)){
252	>	found = 1;
253	>	break;
254	>	}
255	>	}
256	>
257	>	if(!found){
258	>	if((get_alias(device_name)) != 0){
259	>	return -1;
260	>	}
261	>	strncpy(driver_list[x], device_name, BIG_ENOUGH);
262	>	list_entries++;
263	>	}
264	>	}
265	>	}
266	>
267	>	return 0;
268	>	}
269	>
270	>	#endif
271	>
272	>	#if defined(LINUX) || defined(CYGWIN)
273	>	char *sg_f_read_line(FILE *f, const char *string){
274		/* Max line length. 8k should be more than enough */
275		static char line[8192];
276
277	<	while((fgets(line, sizeof(line), f))==NULL){
9	<
277	>	while((fgets(line, sizeof(line), f))!=NULL){
278		if(strncmp(string, line, strlen(string))==0){
279		return line;
280		}
281		}
282
283	+	sg_set_error(SG_ERROR_PARSE, NULL);
284		return NULL;
285	+	}
286	+
287	+	char *sg_get_string_match(char *line, regmatch_t *match){
288	+	int len=match->rm_eo - match->rm_so;
289	+	char *match_string=sg_malloc(len+1);
290	+
291	+	match_string=strncpy(match_string, line+match->rm_so, len);
292	+	match_string[len]='\0';
293	+
294	+	return match_string;
295	+	}
296	+
297	+	/* Cygwin (without a recent newlib) doesn't have atoll */
298	+	#ifndef HAVE_ATOLL
299	+	static long long atoll(const char *s) {
300	+	long long value = 0;
301	+	int isneg = 0;
302	+
303	+	while (*s == ' ' || *s == '\t') {
304	+	s++;
305	+	}
306	+	if (*s == '-') {
307	+	isneg = 1;
308	+	s++;
309	+	}
310	+	while (*s >= '0' && *s <= '9') {
311	+	value = (10 * value) + (*s - '0');
312	+	s++;
313	+	}
314	+	return (isneg ? -value : value);
315	+	}
316	+	#endif
317	+
318	+	long long sg_get_ll_match(char *line, regmatch_t *match){
319	+	char *ptr;
320	+	long long num;
321	+
322	+	ptr=line+match->rm_so;
323	+	num=atoll(ptr);
324	+
325	+	return num;
326	+	}
327	+	#endif
328	+
329	+	/*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
330	+
331	+	/*
332	+	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
333	+	*
334	+	* Permission to use, copy, modify, and distribute this software for any
335	+	* purpose with or without fee is hereby granted, provided that the above
336	+	* copyright notice and this permission notice appear in all copies.
337	+	*
338	+	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
339	+	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
340	+	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
341	+	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
342	+	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
343	+	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
344	+	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
345	+	*/
346	+
347	+	/*
348	+	* Copy src to string dst of size siz.  At most siz-1 characters
349	+	* will be copied.  Always NUL terminates (unless siz == 0).
350	+	* Returns strlen(src); if retval >= siz, truncation occurred.
351	+	*/
352	+	size_t sg_strlcpy(char *dst, const char *src, size_t siz){
353	+	register char *d = dst;
354	+	register const char *s = src;
355	+	register size_t n = siz;
356	+
357	+	/* Copy as many bytes as will fit */
358	+	if (n != 0 && --n != 0) {
359	+	do {
360	+	if ((*d++ = *s++) == 0)
361	+	break;
362	+	} while (--n != 0);
363	+	}
364	+
365	+	/* Not enough room in dst, add NUL and traverse rest of src */
366	+	if (n == 0) {
367	+	if (siz != 0)
368	+	*d = '\0';            /* NUL-terminate dst */
369	+	while (*s++)
370	+	;
371	+	}
372	+
373	+	return(s - src - 1);    /* count does not include NUL */
374	+	}
375	+
376	+	/*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
377	+
378	+	/*
379	+	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
380	+	*
381	+	* Permission to use, copy, modify, and distribute this software for any
382	+	* purpose with or without fee is hereby granted, provided that the above
383	+	* copyright notice and this permission notice appear in all copies.
384	+	*
385	+	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
386	+	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
387	+	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
388	+	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
389	+	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
390	+	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
391	+	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
392	+	*/
393	+
394	+	/*
395	+	* Appends src to string dst of size siz (unlike strncat, siz is the
396	+	* full size of dst, not space left).  At most siz-1 characters
397	+	* will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
398	+	* Returns strlen(src) + MIN(siz, strlen(initial dst)).
399	+	* If retval >= siz, truncation occurred.
400	+	*/
401	+	size_t sg_strlcat(char *dst, const char *src, size_t siz){
402	+	register char *d = dst;
403	+	register const char *s = src;
404	+	register size_t n = siz;
405	+	size_t dlen;
406	+
407	+	/* Find the end of dst and adjust bytes left but don't go past end */
408	+	while (n-- != 0 && *d != '\0')
409	+	d++;
410	+	dlen = d - dst;
411	+	n = siz - dlen;
412	+
413	+	if (n == 0)
414	+	return(dlen + strlen(s));
415	+	while (*s != '\0') {
416	+	if (n != 1) {
417	+	*d++ = *s;
418	+	n--;
419	+	}
420	+	s++;
421	+	}
422	+	*d = '\0';
423	+
424	+	return(dlen + (s - src));       /* count does not include NUL */
425	+	}
426	+
427	+	int sg_update_string(char **dest, const char *src) {
428	+	char *new;
429	+
430	+	if (src == NULL) {
431	+	/* We're being told to set it to NULL. */
432	+	free(*dest);
433	+	*dest = NULL;
434	+	return 0;
435	+	}
436	+
437	+	new = sg_realloc(*dest, strlen(src) + 1);
438	+	if (new == NULL) {
439	+	return -1;
440	+	}
441	+
442	+	strcpy(new, src);
443	+	*dest = new;
444	+	return 0;
445	+	}
446	+
447	+	#if (defined(FREEBSD) && !defined(FREEBSD5)) || defined(DFBSD)
448	+	kvm_t *sg_get_kvm() {
449	+	static kvm_t *kvmd = NULL;
450	+
451	+	if (kvmd != NULL) {
452	+	return kvmd;
453	+	}
454	+
455	+	kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, NULL);
456	+	if(kvmd == NULL) {
457	+	sg_set_error(SG_ERROR_KVM_OPENFILES, NULL);
458	+	}
459	+	return kvmd;
460	+	}
461	+
462	+	/* Can't think of a better name for this function */
463	+	kvm_t *sg_get_kvm2() {
464	+	static kvm_t *kvmd2 = NULL;
465	+
466	+	if (kvmd2 != NULL) {
467	+	return kvmd2;
468	+	}
469	+
470	+	kvmd2 = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, NULL, O_RDONLY, NULL);
471	+	if(kvmd2 == NULL) {
472	+	sg_set_error(SG_ERROR_KVM_OPENFILES, NULL);
473	+	}
474	+	return kvmd2;
475	+	}
476	+	#endif
477	+
478	+	#if defined(NETBSD) || defined(OPENBSD)
479	+	struct uvmexp *sg_get_uvmexp() {
480	+	int mib[2];
481	+	size_t size = sizeof(struct uvmexp);
482	+	static struct uvmexp uvm;
483	+	struct uvmexp *new;
484	+
485	+	mib[0] = CTL_VM;
486	+	mib[1] = VM_UVMEXP;
487	+
488	+	if (sysctl(mib, 2, &uvm, &size, NULL, 0) < 0) {
489	+	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_VM.VM_UVMEXP");
490	+	return NULL;
491	+	}
492	+
493	+	return &uvm;
494	+	}
495	+	#endif
496	+
497	+	#ifdef HPUX
498	+	struct pst_static *sg_get_pstat_static() {
499	+	static int got = 0;
500	+	static struct pst_static pst;
501	+
502	+	if (!got) {
503	+	if (pstat_getstatic(&pst, sizeof pst, 1, 0) == -1) {
504	+	sg_set_error_with_errno(SG_ERROR_PSTAT,
505	+	"pstat_static");
506	+	return NULL;
507	+	}
508	+	got = 1;
509	+	}
510	+	return &pst;
511	+	}
512	+	#endif
513	+
514	+	int sg_init(){
515	+	sg_set_error(SG_ERROR_NONE, NULL);
516	+
517	+	#if (defined(FREEBSD) && !defined(FREEBSD5)) || defined(DFBSD)
518	+	if (sg_get_kvm() == NULL) {
519	+	return -1;
520	+	}
521	+	if (sg_get_kvm2() == NULL) {
522	+	return -1;
523	+	}
524	+	#endif
525	+	#ifdef SOLARIS
526	+	/* On solaris 7, this will fail if you are not root. But, everything
527	+	* will still work, just no disk mappings. So we will ignore the exit
528	+	* status of this, and carry on merrily.
529	+	*/
530	+	#ifdef HAVE_LIBDEVINFO_H
531	+	build_mapping();
532	+	#endif
533	+	#endif
534	+	return 0;
535	+	}
536	+
537	+	int sg_drop_privileges() {
538	+	#ifdef HAVE_SETEGID
539	+	if (setegid(getgid()) != 0) {
540	+	#elif defined(HAVE_SETRESGID)
541	+	if (setresgid(getgid(), getgid(), getgid()) != 0) {
542	+	#else
543	+	{
544	+	#endif
545	+	sg_set_error_with_errno(SG_ERROR_SETEGID, NULL);
546	+	return -1;
547	+	}
548	+	#ifdef HAVE_SETEUID
549	+	if (seteuid(getuid()) != 0) {
550	+	#elif defined(HAVE_SETRESUID)
551	+	if (setresuid(getuid(), getuid(), getuid()) != 0) {
552	+	#else
553	+	{
554	+	#endif
555	+	sg_set_error_with_errno(SG_ERROR_SETEUID, NULL);
556	+	return -1;
557	+	}
558	+	return 0;
559	+	}
560	+
561	+	void *sg_realloc(void *ptr, size_t size) {
562	+	void *tmp = NULL;
563	+	tmp = realloc(ptr, size);
564	+	if(tmp == NULL) {
565	+	sg_set_error_with_errno(SG_ERROR_MALLOC, NULL);
566	+	}
567	+	return tmp;
568		}

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