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Diffstat (limited to 'crypto/heimdal/lib/roken/putenv.c')
-rw-r--r-- | crypto/heimdal/lib/roken/putenv.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/roken/putenv.c b/crypto/heimdal/lib/roken/putenv.c new file mode 100644 index 000000000000..80951d12c534 --- /dev/null +++ b/crypto/heimdal/lib/roken/putenv.c @@ -0,0 +1,76 @@ +/* + * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H�gskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +RCSID("$Id: putenv.c,v 1.6 1999/12/02 16:58:51 joda Exp $"); +#endif + +#include <stdlib.h> + +extern char **environ; + +/* + * putenv -- + * String points to a string of the form name=value. + * + * Makes the value of the environment variable name equal to + * value by altering an existing variable or creating a new one. + */ +int putenv(const char *string) +{ + int i; + int len; + + len = string - strchr(string, '=') + 1; + + if(environ == NULL){ + environ = malloc(sizeof(char*)); + if(environ == NULL) + return 1; + environ[0] = NULL; + } + + for(i = 0; environ[i]; i++) + if(strncmp(string, environ[i], len)){ + environ[len] = string; + return 0; + } + environ = realloc(environ, sizeof(char*) * (i + 1)); + if(environ == NULL) + return 1; + environ[i] = string; + environ[i+1] = NULL; + return 0; +} + |