xref: /illumos-gate/usr/src/lib/libc/port/gen/addsev.c (revision 201ceb75ab95f9bf1f42ea1dc9ab363b43ba47cf)
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 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma	weak _addsev = addsev
31 
32 #include "lint.h"
33 #include "mtlib.h"
34 #include "libc.h"
35 #include <stdlib.h>
36 #include <pfmt.h>
37 #include <thread.h>
38 #include "pfmt_data.h"
39 #include <sys/types.h>
40 #include <string.h>
41 #include <synch.h>
42 
43 int
44 addsev(int severity, const char *string)
45 {
46 	int i, firstfree;
47 	void *new;
48 
49 	/* Cannot redefine standard severity */
50 	if ((severity <= 4) || (severity > 255))
51 		return (-1);
52 
53 	/* Locate severity in table */
54 	lrw_wrlock(&_rw_pfmt_sev_tab);
55 	for (i = 0, firstfree = -1; i < __pfmt_nsev; i++) {
56 		if (__pfmt_sev_tab[i].severity == 0 && firstfree == -1)
57 			firstfree = i;
58 		if (__pfmt_sev_tab[i].severity == severity)
59 			break;
60 	}
61 
62 	if (i == __pfmt_nsev) {
63 		if (string == NULL)	/* Removing non-existing severity */
64 			return (0);
65 		if (firstfree != -1)	/* Re-use old entry */
66 			i = firstfree;
67 		else {
68 			/* Allocate new entry */
69 			new = libc_realloc(__pfmt_sev_tab,
70 			    sizeof (struct sev_tab) * (__pfmt_nsev + 1));
71 			if (new == NULL) {
72 				lrw_unlock(&_rw_pfmt_sev_tab);
73 				return (-1);
74 			}
75 			__pfmt_nsev++;
76 			__pfmt_sev_tab = new;
77 		}
78 	}
79 	if (string == NULL) {
80 		if (__pfmt_sev_tab[i].string)
81 			libc_free(__pfmt_sev_tab[i].string);
82 		__pfmt_sev_tab[i].severity = 0;
83 		__pfmt_sev_tab[i].string = NULL;
84 		lrw_unlock(&_rw_pfmt_sev_tab);
85 		return (0);
86 	}
87 	new = libc_realloc(__pfmt_sev_tab[i].string, strlen(string) + 1);
88 	if (new == NULL) {
89 		lrw_unlock(&_rw_pfmt_sev_tab);
90 		return (-1);
91 	}
92 	__pfmt_sev_tab[i].severity = severity;
93 	__pfmt_sev_tab[i].string = new;
94 	(void) strcpy(__pfmt_sev_tab[i].string, string);
95 	lrw_unlock(&_rw_pfmt_sev_tab);
96 	return (0);
97 }
98