1/*-
2 * Copyright (c) 1998 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
| 1/*-
2 * Copyright (c) 1998 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $FreeBSD: head/sys/kern/kern_environment.c 62454 2000-07-03 09:35:31Z phk $
| 26 * $FreeBSD: head/sys/kern/kern_environment.c 62573 2000-07-04 11:25:35Z phk $
|
27 */
28
29/*
30 * The unified bootloader passes us a pointer to a preserved copy of
31 * bootstrap/kernel environment variables.
32 * We make these available using sysctl for both in-kernel and
33 * out-of-kernel consumers.
34 *
35 * Note that the current sysctl infrastructure doesn't allow
36 * dynamic insertion or traversal through handled spaces. Grr.
37 */
38
39#include <sys/param.h>
40#include <sys/kernel.h>
41#include <sys/systm.h>
42#include <sys/sysctl.h>
43#include <sys/libkern.h>
44
45char *kern_envp;
46
47static char *kernenv_next(char *cp);
48
49char *
50getenv(char *name)
51{
52 char *cp, *ep;
53 int len;
54
55 for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp)) {
56 for (ep = cp; (*ep != '=') && (*ep != 0); ep++)
57 ;
58 len = ep - cp;
59 if (*ep == '=')
60 ep++;
61 if (!strncmp(name, cp, len))
62 return(ep);
63 }
64 return(NULL);
65}
66
67/*
68 * Return an integer value from an environment variable.
69 */
70int
71getenv_int(char *name, int *data)
72{
73 quad_t tmp;
74 int rval;
75
76 rval = getenv_quad(name, &tmp);
77 if (rval) {
78 *data = (int) tmp;
79 }
80 return (rval);
81}
82
83/*
84 * Return a quad_t value from an environment variable.
85 */
86quad_t
87getenv_quad(char *name, quad_t *data)
88{
89 const char *value;
90 char *vtp;
91 quad_t iv;
92
93 if ((value = getenv(name)) == NULL)
94 return(0);
95
96 iv = strtoq(value, &vtp, 0);
97 if ((vtp == value) || (*vtp != '\0'))
98 return(0);
99
100 *data = iv;
101 return(1);
102}
103
104static int
| 27 */
28
29/*
30 * The unified bootloader passes us a pointer to a preserved copy of
31 * bootstrap/kernel environment variables.
32 * We make these available using sysctl for both in-kernel and
33 * out-of-kernel consumers.
34 *
35 * Note that the current sysctl infrastructure doesn't allow
36 * dynamic insertion or traversal through handled spaces. Grr.
37 */
38
39#include <sys/param.h>
40#include <sys/kernel.h>
41#include <sys/systm.h>
42#include <sys/sysctl.h>
43#include <sys/libkern.h>
44
45char *kern_envp;
46
47static char *kernenv_next(char *cp);
48
49char *
50getenv(char *name)
51{
52 char *cp, *ep;
53 int len;
54
55 for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp)) {
56 for (ep = cp; (*ep != '=') && (*ep != 0); ep++)
57 ;
58 len = ep - cp;
59 if (*ep == '=')
60 ep++;
61 if (!strncmp(name, cp, len))
62 return(ep);
63 }
64 return(NULL);
65}
66
67/*
68 * Return an integer value from an environment variable.
69 */
70int
71getenv_int(char *name, int *data)
72{
73 quad_t tmp;
74 int rval;
75
76 rval = getenv_quad(name, &tmp);
77 if (rval) {
78 *data = (int) tmp;
79 }
80 return (rval);
81}
82
83/*
84 * Return a quad_t value from an environment variable.
85 */
86quad_t
87getenv_quad(char *name, quad_t *data)
88{
89 const char *value;
90 char *vtp;
91 quad_t iv;
92
93 if ((value = getenv(name)) == NULL)
94 return(0);
95
96 iv = strtoq(value, &vtp, 0);
97 if ((vtp == value) || (*vtp != '\0'))
98 return(0);
99
100 *data = iv;
101 return(1);
102}
103
104static int
|
105sysctl_kernenv (SYSCTL_HANDLER_ARGS)
| 105sysctl_kernenv(SYSCTL_HANDLER_ARGS)
|
106{
107 int *name = (int *)arg1;
108 u_int namelen = arg2;
109 char *cp;
110 int i, error;
111
112 if (kern_envp == NULL)
113 return(ENOENT);
114
115 name++;
116 namelen--;
117
118 if (namelen != 1)
119 return(EINVAL);
120
121 cp = kern_envp;
122 for (i = 0; i < name[0]; i++) {
123 cp = kernenv_next(cp);
124 if (cp == NULL)
125 break;
126 }
127
128 if (cp == NULL)
129 return(ENOENT);
130
131 error = SYSCTL_OUT(req, cp, strlen(cp) + 1);
132 return (error);
133}
134
135SYSCTL_NODE(_kern, OID_AUTO, environment, CTLFLAG_RD, sysctl_kernenv, "kernel environment space");
136
137/*
138 * Find the next entry after the one which (cp) falls within, return a
139 * pointer to its start or NULL if there are no more.
140 */
141static char *
142kernenv_next(char *cp)
143{
144 if (cp != NULL) {
145 while (*cp != 0)
146 cp++;
147 cp++;
148 if (*cp == 0)
149 cp = NULL;
150 }
151 return(cp);
152}
153
| 106{
107 int *name = (int *)arg1;
108 u_int namelen = arg2;
109 char *cp;
110 int i, error;
111
112 if (kern_envp == NULL)
113 return(ENOENT);
114
115 name++;
116 namelen--;
117
118 if (namelen != 1)
119 return(EINVAL);
120
121 cp = kern_envp;
122 for (i = 0; i < name[0]; i++) {
123 cp = kernenv_next(cp);
124 if (cp == NULL)
125 break;
126 }
127
128 if (cp == NULL)
129 return(ENOENT);
130
131 error = SYSCTL_OUT(req, cp, strlen(cp) + 1);
132 return (error);
133}
134
135SYSCTL_NODE(_kern, OID_AUTO, environment, CTLFLAG_RD, sysctl_kernenv, "kernel environment space");
136
137/*
138 * Find the next entry after the one which (cp) falls within, return a
139 * pointer to its start or NULL if there are no more.
140 */
141static char *
142kernenv_next(char *cp)
143{
144 if (cp != NULL) {
145 while (*cp != 0)
146 cp++;
147 cp++;
148 if (*cp == 0)
149 cp = NULL;
150 }
151 return(cp);
152}
153
|