2 * Copyright (c) 2000 Peter Wemm <peter@freebsd.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/types.h>
30 #include <sys/sysctl.h>
39 static void usage(void);
40 static int kdumpenv(int dump_type);
41 static int kgetenv(const char *);
42 static int ksetenv(const char *, char *);
43 static int kunsetenv(const char *);
56 (void)fprintf(stderr, "%s\n%s\n%s\n",
57 "usage: kenv [-l|-s] [-hNq]",
58 " kenv [-qv] variable[=value]",
59 " kenv [-q] -u variable");
64 main(int argc, char **argv)
71 while ((ch = getopt(argc, argv, "hlNqsuv")) != -1) {
102 eq = strchr(env, '=');
110 if ((hflag || Nflag) && env != NULL)
114 if (argc > 0 || ((uflag || vflag) && env == NULL))
118 error = kdumpenv(KENV_DUMP_LOADER);
120 error = kdumpenv(KENV_DUMP_STATIC);
122 error = kdumpenv(KENV_DUMP);
123 if (error && !qflag) {
125 warnx("requested environment is unavailable");
129 } else if (val == NULL) {
131 error = kunsetenv(env);
133 warnx("unable to unset %s", env);
135 error = kgetenv(env);
137 warnx("unable to get %s", env);
140 error = ksetenv(env, val);
142 warnx("unable to set %s to %s", env, val);
148 kdumpenv(int dump_type)
153 envlen = kenv(dump_type, NULL, NULL, 0);
157 buflen = envlen * 120 / 100;
158 buf = calloc(1, buflen + 1);
161 envlen = kenv(dump_type, NULL, buf, buflen);
172 for (bp = buf; *bp != '\0'; bp += strlen(bp) + 1) {
174 if (strncmp(bp, "hint.", 5) != 0)
177 cp = strchr(bp, '=');
184 printf("%s=\"%s\"\n", bp, cp);
193 kgetenv(const char *env)
198 ret = kenv(KENV_GET, env, buf, sizeof(buf));
202 printf("%s=\"%s\"\n", env, buf);
209 ksetenv(const char *env, char *val)
213 ret = kenv(KENV_SET, env, val, strlen(val) + 1);
215 printf("%s=\"%s\"\n", env, val);
220 kunsetenv(const char *env)
224 ret = kenv(KENV_UNSET, env, NULL, 0);