xref: /titanic_41/usr/src/lib/libunistat/common/spcs_log.c (revision fcf3ce441efd61da9bb2884968af01cb7c1452cc)
1*fcf3ce44SJohn Forte /*
2*fcf3ce44SJohn Forte  * CDDL HEADER START
3*fcf3ce44SJohn Forte  *
4*fcf3ce44SJohn Forte  * The contents of this file are subject to the terms of the
5*fcf3ce44SJohn Forte  * Common Development and Distribution License (the "License").
6*fcf3ce44SJohn Forte  * You may not use this file except in compliance with the License.
7*fcf3ce44SJohn Forte  *
8*fcf3ce44SJohn Forte  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*fcf3ce44SJohn Forte  * or http://www.opensolaris.org/os/licensing.
10*fcf3ce44SJohn Forte  * See the License for the specific language governing permissions
11*fcf3ce44SJohn Forte  * and limitations under the License.
12*fcf3ce44SJohn Forte  *
13*fcf3ce44SJohn Forte  * When distributing Covered Code, include this CDDL HEADER in each
14*fcf3ce44SJohn Forte  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*fcf3ce44SJohn Forte  * If applicable, add the following below this CDDL HEADER, with the
16*fcf3ce44SJohn Forte  * fields enclosed by brackets "[]" replaced with your own identifying
17*fcf3ce44SJohn Forte  * information: Portions Copyright [yyyy] [name of copyright owner]
18*fcf3ce44SJohn Forte  *
19*fcf3ce44SJohn Forte  * CDDL HEADER END
20*fcf3ce44SJohn Forte  */
21*fcf3ce44SJohn Forte /*
22*fcf3ce44SJohn Forte  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23*fcf3ce44SJohn Forte  * Use is subject to license terms.
24*fcf3ce44SJohn Forte  */
25*fcf3ce44SJohn Forte 
26*fcf3ce44SJohn Forte #include <sys/types.h>
27*fcf3ce44SJohn Forte #include <sys/time.h>
28*fcf3ce44SJohn Forte #include <errno.h>
29*fcf3ce44SJohn Forte #include <stdio.h>
30*fcf3ce44SJohn Forte #include <string.h>
31*fcf3ce44SJohn Forte #include <fcntl.h>
32*fcf3ce44SJohn Forte #include <stdlib.h>
33*fcf3ce44SJohn Forte #include <unistd.h>
34*fcf3ce44SJohn Forte #include <values.h>
35*fcf3ce44SJohn Forte #include <locale.h>
36*fcf3ce44SJohn Forte #include <sys/stat.h>
37*fcf3ce44SJohn Forte #include <strings.h>
38*fcf3ce44SJohn Forte #include <stdarg.h>
39*fcf3ce44SJohn Forte #include <sys/param.h>
40*fcf3ce44SJohn Forte #include <sys/nsctl/nsctl.h>
41*fcf3ce44SJohn Forte 
42*fcf3ce44SJohn Forte #include <sys/unistat/spcs_s.h>
43*fcf3ce44SJohn Forte #include <sys/unistat/spcs_s_u.h>
44*fcf3ce44SJohn Forte #include <sys/unistat/spcs_errors.h>
45*fcf3ce44SJohn Forte 
46*fcf3ce44SJohn Forte #define	MAX_SESSION_LOG    (10 * 1024 * 1024)	/* allowable log file size */
47*fcf3ce44SJohn Forte 
48*fcf3ce44SJohn Forte static char	sessionlog[]	 =  "/var/adm/ds.log";
49*fcf3ce44SJohn Forte static char	sessionlog_bak[] =  "/var/adm/ds.log.bak";
50*fcf3ce44SJohn Forte 
51*fcf3ce44SJohn Forte static char *spcstime();
52*fcf3ce44SJohn Forte 
53*fcf3ce44SJohn Forte void
spcs_log(const char * product,spcs_s_info_t * status,const char * format,...)54*fcf3ce44SJohn Forte spcs_log(const char *product, spcs_s_info_t *status, const char *format, ...)
55*fcf3ce44SJohn Forte {
56*fcf3ce44SJohn Forte 	struct  stat st;
57*fcf3ce44SJohn Forte 	FILE   *fp = NULL;
58*fcf3ce44SJohn Forte 	struct flock lk;
59*fcf3ce44SJohn Forte 	va_list	ap;
60*fcf3ce44SJohn Forte 
61*fcf3ce44SJohn Forte 	bzero(&lk, sizeof (lk));
62*fcf3ce44SJohn Forte 
63*fcf3ce44SJohn Forte 	/*
64*fcf3ce44SJohn Forte 	 * check the file size, if > than MAX_SESSION_LOG bytes make a .bak
65*fcf3ce44SJohn Forte 	 * and truncate
66*fcf3ce44SJohn Forte 	 */
67*fcf3ce44SJohn Forte 	if (stat(sessionlog, &st) == 0) {
68*fcf3ce44SJohn Forte 		if (st.st_size > MAX_SESSION_LOG) {
69*fcf3ce44SJohn Forte 			rename(sessionlog, sessionlog_bak);
70*fcf3ce44SJohn Forte 		}
71*fcf3ce44SJohn Forte 	}
72*fcf3ce44SJohn Forte 
73*fcf3ce44SJohn Forte 	va_start(ap, format);
74*fcf3ce44SJohn Forte 	if ((fp = fopen(sessionlog, "a")) == (FILE *)NULL)
75*fcf3ce44SJohn Forte 		goto fail;
76*fcf3ce44SJohn Forte 	lk.l_type = F_WRLCK;
77*fcf3ce44SJohn Forte 	lk.l_whence = SEEK_SET;
78*fcf3ce44SJohn Forte 	lk.l_start = (off_t)0;
79*fcf3ce44SJohn Forte 	lk.l_len = (off_t)0;
80*fcf3ce44SJohn Forte 
81*fcf3ce44SJohn Forte 	if (fcntl(fileno(fp), F_SETLKW, &lk) < 0)
82*fcf3ce44SJohn Forte 		goto fail;
83*fcf3ce44SJohn Forte 
84*fcf3ce44SJohn Forte 
85*fcf3ce44SJohn Forte 	fprintf(fp, "%s %s: ", spcstime(), product);
86*fcf3ce44SJohn Forte 	(void) vfprintf(fp, format, ap);
87*fcf3ce44SJohn Forte 	fputs("\n", fp);
88*fcf3ce44SJohn Forte 	if (status)
89*fcf3ce44SJohn Forte 		spcs_s_report(*status, fp);
90*fcf3ce44SJohn Forte 
91*fcf3ce44SJohn Forte 	fflush(fp);
92*fcf3ce44SJohn Forte 
93*fcf3ce44SJohn Forte 	lk.l_type = F_UNLCK;
94*fcf3ce44SJohn Forte 
95*fcf3ce44SJohn Forte 	(void) fcntl(fileno(fp), F_SETLKW, &lk);
96*fcf3ce44SJohn Forte 
97*fcf3ce44SJohn Forte fail:
98*fcf3ce44SJohn Forte 	if (fp)
99*fcf3ce44SJohn Forte 		fclose(fp);
100*fcf3ce44SJohn Forte 	va_end(ap);
101*fcf3ce44SJohn Forte }
102*fcf3ce44SJohn Forte 
103*fcf3ce44SJohn Forte /*
104*fcf3ce44SJohn Forte  * spcstime():  gets current time
105*fcf3ce44SJohn Forte  */
106*fcf3ce44SJohn Forte static char *
spcstime()107*fcf3ce44SJohn Forte spcstime()
108*fcf3ce44SJohn Forte {
109*fcf3ce44SJohn Forte 	static char timeptr[20];
110*fcf3ce44SJohn Forte 	time_t tnow;
111*fcf3ce44SJohn Forte 
112*fcf3ce44SJohn Forte 	tnow = time((time_t *)0);
113*fcf3ce44SJohn Forte 	cftime(timeptr, "%b %d %T", &tnow);
114*fcf3ce44SJohn Forte 	return (timeptr);
115*fcf3ce44SJohn Forte }
116