/*
- * Copyright (c) 1987 Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1987, 1993
+ * The Regents of the University of California. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement: ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)setenv.c 5.4 (Berkeley) 6/1/90";
+static char sccsid[] = "@(#)setenv.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <stddef.h>
#include <stdlib.h>
+#include <string.h>
+
+char *__findenv __P((const char *, int *));
/*
* setenv --
* "value". If rewrite is set, replace any current value.
*/
setenv(name, value, rewrite)
- register char *name, *value;
+ register const char *name;
+ register const char *value;
int rewrite;
{
extern char **environ;
static int alloced; /* if allocated space before */
- register char *C;
+ register char *c;
int l_value, offset;
- char *_findenv();
if (*value == '=') /* no `=' in value */
++value;
l_value = strlen(value);
- if ((C = _findenv(name, &offset))) { /* find if already exists */
+ 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);
+ 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;
+ } else { /* create new slot */
+ register int cnt;
+ register char **p;
- for (P = environ, cnt = 0; *P; ++P, ++cnt);
+ 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);
+ 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);
- bcopy(environ, P, cnt * sizeof(char *));
- environ = P;
+ p = malloc((size_t)(sizeof(char *) * (cnt + 2)));
+ if (!p)
+ return (-1);
+ bcopy(environ, p, cnt * sizeof(char *));
+ environ = p;
}
environ[cnt + 1] = NULL;
offset = cnt;
}
- for (C = name; *C && *C != '='; ++C); /* no `=' in name */
+ 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);
+ 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);
}
/*
*/
void
unsetenv(name)
- char *name;
+ const char *name;
{
extern char **environ;
- register char **P;
+ register char **p;
int offset;
- while (_findenv(name, &offset)) /* if set multiple times */
- for (P = &environ[offset];; ++P)
- if (!(*P = *(P + 1)))
+ while (__findenv(name, &offset)) /* if set multiple times */
+ for (p = &environ[offset];; ++p)
+ if (!(*p = *(p + 1)))
break;
}