Added variables from kern_environment to remove linker errors.

1 files changed, 585 insertions, 0 deletions

diff --git a/freebsd/kern/kern_environment.c b/freebsd/kern/kern_environment.c
new file mode 100644
index 00000000..faee420d
--- /dev/null
+++ b/freebsd/kern/kern_environment.c
@@ -0,0 +1,585 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (c) 1998 Michael Smith
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * The unified bootloader passes us a pointer to a preserved copy of
+ * bootstrap/kernel environment variables.  We convert them to a
+ * dynamic array of strings later when the VM subsystem is up.
+ *
+ * We make these available through the kenv(2) syscall for userland
+ * and through getenv()/freeenv() setenv() unsetenv() testenv() for
+ * the kernel.
+ */
+
+#include <freebsd/sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <freebsd/sys/types.h>
+#include <freebsd/sys/param.h>
+#include <freebsd/sys/proc.h>
+#include <freebsd/sys/queue.h>
+#include <freebsd/sys/lock.h>
+#include <freebsd/sys/malloc.h>
+#include <freebsd/sys/mutex.h>
+#include <freebsd/sys/priv.h>
+#include <freebsd/sys/kernel.h>
+#include <freebsd/sys/systm.h>
+#include <freebsd/sys/sysent.h>
+#include <freebsd/sys/sysproto.h>
+#include <freebsd/sys/libkern.h>
+#include <freebsd/sys/kenv.h>
+
+#include <freebsd/security/mac/mac_framework.h>
+
+static MALLOC_DEFINE(M_KENV, "kenv", "kernel environment");
+
+#define KENV_SIZE	512	/* Maximum number of environment strings */
+
+/* pointer to the static environment */
+char		*kern_envp;
+static char	*kernenv_next(char *);
+
+/* dynamic environment variables */
+char		**kenvp;
+struct mtx	kenv_lock;
+
+/*
+ * No need to protect this with a mutex since SYSINITS are single threaded.
+ */
+int	dynamic_kenv = 0;
+
+#define KENV_CHECK	if (!dynamic_kenv) \
+			    panic("%s: called before SI_SUB_KMEM", __func__)
+#ifndef __rtems__
+int
+kenv(td, uap)
+	struct thread *td;
+	struct kenv_args /* {
+		int what;
+		const char *name;
+		char *value;
+		int len;
+	} */ *uap;
+{
+	char *name, *value, *buffer = NULL;
+	size_t len, done, needed, buflen;
+	int error, i;
+
+	KASSERT(dynamic_kenv, ("kenv: dynamic_kenv = 0"));
+
+	error = 0;
+	if (uap->what == KENV_DUMP) {
+#ifdef MAC
+		error = mac_kenv_check_dump(td->td_ucred);
+		if (error)
+			return (error);
+#endif
+		done = needed = 0;
+		buflen = uap->len;
+		if (buflen > KENV_SIZE * (KENV_MNAMELEN + KENV_MVALLEN + 2))
+			buflen = KENV_SIZE * (KENV_MNAMELEN +
+			    KENV_MVALLEN + 2);
+		if (uap->len > 0 && uap->value != NULL)
+			buffer = malloc(buflen, M_TEMP, M_WAITOK|M_ZERO);
+		mtx_lock(&kenv_lock);
+		for (i = 0; kenvp[i] != NULL; i++) {
+			len = strlen(kenvp[i]) + 1;
+			needed += len;
+			len = min(len, buflen - done);
+			/*
+			 * If called with a NULL or insufficiently large
+			 * buffer, just keep computing the required size.
+			 */
+			if (uap->value != NULL && buffer != NULL && len > 0) {
+				bcopy(kenvp[i], buffer + done, len);
+				done += len;
+			}
+		}
+		mtx_unlock(&kenv_lock);
+		if (buffer != NULL) {
+			error = copyout(buffer, uap->value, done);
+			free(buffer, M_TEMP);
+		}
+		td->td_retval[0] = ((done == needed) ? 0 : needed);
+		return (error);
+	}
+
+	switch (uap->what) {
+	case KENV_SET:
+		error = priv_check(td, PRIV_KENV_SET);
+		if (error)
+			return (error);
+		break;
+
+	case KENV_UNSET:
+		error = priv_check(td, PRIV_KENV_UNSET);
+		if (error)
+			return (error);
+		break;
+	}
+
+	name = malloc(KENV_MNAMELEN, M_TEMP, M_WAITOK);
+
+	error = copyinstr(uap->name, name, KENV_MNAMELEN, NULL);
+	if (error)
+		goto done;
+
+	switch (uap->what) {
+	case KENV_GET:
+#ifdef MAC
+		error = mac_kenv_check_get(td->td_ucred, name);
+		if (error)
+			goto done;
+#endif
+		value = getenv(name);
+		if (value == NULL) {
+			error = ENOENT;
+			goto done;
+		}
+		len = strlen(value) + 1;
+		if (len > uap->len)
+			len = uap->len;
+		error = copyout(value, uap->value, len);
+		freeenv(value);
+		if (error)
+			goto done;
+		td->td_retval[0] = len;
+		break;
+	case KENV_SET:
+		len = uap->len;
+		if (len < 1) {
+			error = EINVAL;
+			goto done;
+		}
+		if (len > KENV_MVALLEN)
+			len = KENV_MVALLEN;
+		value = malloc(len, M_TEMP, M_WAITOK);
+		error = copyinstr(uap->value, value, len, NULL);
+		if (error) {
+			free(value, M_TEMP);
+			goto done;
+		}
+#ifdef MAC
+		error = mac_kenv_check_set(td->td_ucred, name, value);
+		if (error == 0)
+#endif
+			setenv(name, value);
+		free(value, M_TEMP);
+		break;
+	case KENV_UNSET:
+#ifdef MAC
+		error = mac_kenv_check_unset(td->td_ucred, name);
+		if (error)
+			goto done;
+#endif
+		error = unsetenv(name);
+		if (error)
+			error = ENOENT;
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+done:
+	free(name, M_TEMP);
+	return (error);
+}
+
+/*
+ * Setup the dynamic kernel environment.
+ */
+static void
+init_dynamic_kenv(void *data __unused)
+{
+	char *cp;
+	int len, i;
+
+	kenvp = malloc((KENV_SIZE + 1) * sizeof(char *), M_KENV,
+		M_WAITOK | M_ZERO);
+	i = 0;
+	for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp)) {
+		len = strlen(cp) + 1;
+		if (i < KENV_SIZE) {
+			kenvp[i] = malloc(len, M_KENV, M_WAITOK);
+			strcpy(kenvp[i++], cp);
+		} else
+			printf(
+			    "WARNING: too many kenv strings, ignoring %s\n",
+			    cp);
+	}
+	kenvp[i] = NULL;
+
+	mtx_init(&kenv_lock, "kernel environment", NULL, MTX_DEF);
+	dynamic_kenv = 1;
+}
+SYSINIT(kenv, SI_SUB_KMEM, SI_ORDER_ANY, init_dynamic_kenv, NULL);
+
+void
+freeenv(char *env)
+{
+
+	if (dynamic_kenv)
+		free(env, M_KENV);
+}
+
+/*
+ * Internal functions for string lookup.
+ */
+static char *
+_getenv_dynamic(const char *name, int *idx)
+{
+	char *cp;
+	int len, i;
+
+	mtx_assert(&kenv_lock, MA_OWNED);
+	len = strlen(name);
+	for (cp = kenvp[0], i = 0; cp != NULL; cp = kenvp[++i]) {
+		if ((strncmp(cp, name, len) == 0) &&
+		    (cp[len] == '=')) {
+			if (idx != NULL)
+				*idx = i;
+			return (cp + len + 1);
+		}
+	}
+	return (NULL);
+}
+
+static char *
+_getenv_static(const char *name)
+{
+	char *cp, *ep;
+	int len;
+
+	for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp)) {
+		for (ep = cp; (*ep != '=') && (*ep != 0); ep++)
+			;
+		if (*ep != '=')
+			continue;
+		len = ep - cp;
+		ep++;
+		if (!strncmp(name, cp, len) && name[len] == 0)
+			return (ep);
+	}
+	return (NULL);
+}
+
+/*
+ * Look up an environment variable by name.
+ * Return a pointer to the string if found.
+ * The pointer has to be freed with freeenv()
+ * after use.
+ */
+char *
+getenv(const char *name)
+{
+	char buf[KENV_MNAMELEN + 1 + KENV_MVALLEN + 1];
+	char *ret, *cp;
+	int len;
+
+	if (dynamic_kenv) {
+		mtx_lock(&kenv_lock);
+		cp = _getenv_dynamic(name, NULL);
+		if (cp != NULL) {
+			strcpy(buf, cp);
+			mtx_unlock(&kenv_lock);
+			len = strlen(buf) + 1;
+			ret = malloc(len, M_KENV, M_WAITOK);
+			strcpy(ret, buf);
+		} else {
+			mtx_unlock(&kenv_lock);
+			ret = NULL;
+		}
+	} else
+		ret = _getenv_static(name);
+	return (ret);
+}
+
+/*
+ * Test if an environment variable is defined.
+ */
+int
+testenv(const char *name)
+{
+	char *cp;
+
+	if (dynamic_kenv) {
+		mtx_lock(&kenv_lock);
+		cp = _getenv_dynamic(name, NULL);
+		mtx_unlock(&kenv_lock);
+	} else
+		cp = _getenv_static(name);
+	if (cp != NULL)
+		return (1);
+	return (0);
+}
+
+/*
+ * Set an environment variable by name.
+ */
+int
+setenv(const char *name, const char *value)
+{
+	char *buf, *cp, *oldenv;
+	int namelen, vallen, i;
+
+	KENV_CHECK;
+
+	namelen = strlen(name) + 1;
+	if (namelen > KENV_MNAMELEN)
+		return (-1);
+	vallen = strlen(value) + 1;
+	if (vallen > KENV_MVALLEN)
+		return (-1);
+	buf = malloc(namelen + vallen, M_KENV, M_WAITOK);
+	sprintf(buf, "%s=%s", name, value);
+
+	mtx_lock(&kenv_lock);
+	cp = _getenv_dynamic(name, &i);
+	if (cp != NULL) {
+		oldenv = kenvp[i];
+		kenvp[i] = buf;
+		mtx_unlock(&kenv_lock);
+		free(oldenv, M_KENV);
+	} else {
+		/* We add the option if it wasn't found */
+		for (i = 0; (cp = kenvp[i]) != NULL; i++)
+			;
+
+		/* Bounds checking */
+		if (i < 0 || i >= KENV_SIZE) {
+			free(buf, M_KENV);
+			mtx_unlock(&kenv_lock);
+			return (-1);
+		}
+
+		kenvp[i] = buf;
+		kenvp[i + 1] = NULL;
+		mtx_unlock(&kenv_lock);
+	}
+	return (0);
+}
+
+/*
+ * Unset an environment variable string.
+ */
+int
+unsetenv(const char *name)
+{
+	char *cp, *oldenv;
+	int i, j;
+
+	KENV_CHECK;
+
+	mtx_lock(&kenv_lock);
+	cp = _getenv_dynamic(name, &i);
+	if (cp != NULL) {
+		oldenv = kenvp[i];
+		for (j = i + 1; kenvp[j] != NULL; j++)
+			kenvp[i++] = kenvp[j];
+		kenvp[i] = NULL;
+		mtx_unlock(&kenv_lock);
+		free(oldenv, M_KENV);
+		return (0);
+	}
+	mtx_unlock(&kenv_lock);
+	return (-1);
+}
+
+/*
+ * Return a string value from an environment variable.
+ */
+int
+getenv_string(const char *name, char *data, int size)
+{
+	char *tmp;
+
+	tmp = getenv(name);
+	if (tmp != NULL) {
+		strlcpy(data, tmp, size);
+		freeenv(tmp);
+		return (1);
+	} else
+		return (0);
+}
+
+/*
+ * Return an integer value from an environment variable.
+ */
+int
+getenv_int(const char *name, int *data)
+{
+	quad_t tmp;
+	int rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (int) tmp;
+	return (rval);
+}
+
+/*
+ * Return an unsigned integer value from an environment variable.
+ */
+int
+getenv_uint(const char *name, unsigned int *data)
+{
+	quad_t tmp;
+	int rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (unsigned int) tmp;
+	return (rval);
+}
+
+/*
+ * Return a long value from an environment variable.
+ */
+int
+getenv_long(const char *name, long *data)
+{
+	quad_t tmp;
+	int rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (long) tmp;
+	return (rval);
+}
+
+/*
+ * Return an unsigned long value from an environment variable.
+ */
+int
+getenv_ulong(const char *name, unsigned long *data)
+{
+	quad_t tmp;
+	int rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (unsigned long) tmp;
+	return (rval);
+}
+
+/*
+ * Return a quad_t value from an environment variable.
+ */
+int
+getenv_quad(const char *name, quad_t *data)
+{
+	char	*value;
+	char	*vtp;
+	quad_t	iv;
+
+	value = getenv(name);
+	if (value == NULL)
+		return (0);
+	iv = strtoq(value, &vtp, 0);
+	if (vtp == value || (vtp[0] != '\0' && vtp[1] != '\0')) {
+		freeenv(value);
+		return (0);
+	}
+	switch (vtp[0]) {
+	case 't': case 'T':
+		iv *= 1024;
+	case 'g': case 'G':
+		iv *= 1024;
+	case 'm': case 'M':
+		iv *= 1024;
+	case 'k': case 'K':
+		iv *= 1024;
+	case '\0':
+		break;
+	default:
+		freeenv(value);
+		return (0);
+	}
+	*data = iv;
+	freeenv(value);
+	return (1);
+}
+
+/*
+ * Find the next entry after the one which (cp) falls within, return a
+ * pointer to its start or NULL if there are no more.
+ */
+static char *
+kernenv_next(char *cp)
+{
+
+	if (cp != NULL) {
+		while (*cp != 0)
+			cp++;
+		cp++;
+		if (*cp == 0)
+			cp = NULL;
+	}
+	return (cp);
+}
+
+void
+tunable_int_init(void *data)
+{
+	struct tunable_int *d = (struct tunable_int *)data;
+
+	TUNABLE_INT_FETCH(d->path, d->var);
+}
+
+void
+tunable_long_init(void *data)
+{
+	struct tunable_long *d = (struct tunable_long *)data;
+
+	TUNABLE_LONG_FETCH(d->path, d->var);
+}
+
+void
+tunable_ulong_init(void *data)
+{
+	struct tunable_ulong *d = (struct tunable_ulong *)data;
+
+	TUNABLE_ULONG_FETCH(d->path, d->var);
+}
+
+void
+tunable_quad_init(void *data)
+{
+	struct tunable_quad *d = (struct tunable_quad *)data;
+
+	TUNABLE_QUAD_FETCH(d->path, d->var);
+}
+
+void
+tunable_str_init(void *data)
+{
+	struct tunable_str *d = (struct tunable_str *)data;
+
+	TUNABLE_STR_FETCH(d->path, d->var, d->size);
+}
+#endif /* __rtems__ */