62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 1994 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern char **environ;
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static short setenv_made_new_vector= 0;
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char *setenv(char *name, char *value)
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{ char *p= NULL, **q;
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int length= 0, vl;
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if ((p= getenv(name)) == NULL) { /* Allocate new vector */
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for (q= environ; *q != NULL; q++, length++);
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q= (char **)malloc((unsigned)(sizeof(char *)*(length+2)));
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memcpy(((char *)q)+sizeof(char *), (char *)environ, sizeof(char *)*(length+1));
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if (setenv_made_new_vector++)
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free((char *)environ);
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length= strlen(name);
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environ= q;}
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else { /* Find old slot */
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length= strlen(name);
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for (q= environ; *q != NULL; q++)
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if (!strncmp(*q, name, length))
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break;};
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vl= strlen(value);
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if (!p || (length+vl+1 > strlen(p)))
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*q= p= (char *) malloc((unsigned)(length+vl+2));
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else
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p= *q;
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(void)strcpy(p, name); p+= length;
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*p++= '=';
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(void)strcpy(p, value);
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return(value);
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}
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