+++ /dev/null
-/*
- * Copyright (c) 1987, 1993
- * The Regents of the University of California. 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- */
-
-/* based on @(#)setenv.c 8.1 (Berkeley) 6/4/93 */
-/* based on @(#)getenv.c 8.1 (Berkeley) 6/4/93 */
-
-#ifndef __STDC__
-#define const
-#endif
-
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifndef __P
-#define __P(x) ()
-#endif
-char *__findenv __P((const char *, int *));
-
-/*
- * setenv --
- * Set the value of the environmental variable "name" to be
- * "value". If rewrite is set, replace any current value.
- */
-setenv(name, value, rewrite)
- register const char *name;
- register const char *value;
- int rewrite;
-{
- extern char **environ;
- static int alloced; /* if allocated space before */
- register char *c;
- int l_value, offset;
-
- if (*value == '=') /* no `=' in value */
- ++value;
- l_value = strlen(value);
- if ((c = __findenv(name, &offset))) { /* find if already exists */
- if (!rewrite)
- return (0);
- if (strlen(c) >= l_value) { /* old larger; copy over */
- while (*c++ = *value++);
- return (0);
- }
- } else { /* create new slot */
- register int cnt;
- register char **p;
-
- for (p = environ, cnt = 0; *p; ++p, ++cnt);
- if (alloced) { /* just increase size */
- environ = (char **)realloc((char *)environ,
- (size_t)(sizeof(char *) * (cnt + 2)));
- if (!environ)
- return (-1);
- }
- else { /* get new space */
- alloced = 1; /* copy old entries into it */
- p = (char **)malloc((size_t)(sizeof(char *) * (cnt + 2)));
- if (!p)
- return (-1);
- memcpy(p, environ, cnt * sizeof(char *));
- environ = p;
- }
- environ[cnt + 1] = NULL;
- offset = cnt;
- }
- for (c = (char *)name; *c && *c != '='; ++c); /* no `=' in name */
- if (!(environ[offset] = /* name + `=' + value */
- malloc((size_t)((int)(c - name) + l_value + 2))))
- return (-1);
- for (c = environ[offset]; (*c = *name++) && *c != '='; ++c);
- for (*c++ = '='; *c++ = *value++;);
- return (0);
-}
-
-/*
- * unsetenv(name) --
- * Delete environmental variable "name".
- */
-void
-unsetenv(name)
- const char *name;
-{
- extern char **environ;
- register char **p;
- int offset;
-
- while (__findenv(name, &offset)) /* if set multiple times */
- for (p = &environ[offset];; ++p)
- if (!(*p = *(p + 1)))
- break;
-}
-
-/*
- * getenv --
- * Returns ptr to value associated with name, if any, else NULL.
- */
-char *
-getenv(name)
- const char *name;
-{
- int offset;
-
- return (__findenv(name, &offset));
-}
-
-/*
- * __findenv --
- * Returns pointer to value associated with name, if any, else NULL.
- * Sets offset to be the offset of the name/value combination in the
- * environmental array, for use by setenv(3) and unsetenv(3).
- * Explicitly removes '=' in argument name.
- */
-static char *
-__findenv(name, offset)
- register const char *name;
- int *offset;
-{
- extern char **environ;
- register int len;
- register const char *np;
- register char **p, *c;
-
- if (name == NULL || environ == NULL)
- return (NULL);
- for (np = name; *np && *np != '='; ++np)
- continue;
- len = np - name;
- for (p = environ; (c = *p) != NULL; ++p)
- if (strncmp(c, name, len) == 0 && c[len] == '=') {
- *offset = p - environ;
- return (c + len + 1);
- }
- return (NULL);
-}
projects / krb5.git / commitdiff