envz_add.c from Gdb at Krugle
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/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <argz.h>
#include <envz.h>
error_t
_DEFUN (envz_add, (envz, envz_len, name, value),
char **envz _AND
size_t *envz_len _AND
const char *name _AND
const char *value)
{
char *concat = NULL;
int name_len = 0;
int val_len = 0;
int retval = 0;
envz_remove(envz, envz_len, name);
if (value)
{
name_len = strlen(name);
val_len = strlen(value);
if(!(concat = (char *) malloc(name_len + val_len + 2)))
return ENOMEM;
memcpy(concat, name, name_len);
concat[name_len] = '=';
memcpy(concat + name_len + 1, value, val_len + 1);
retval = argz_add(envz, envz_len, concat);
free(concat);
}
else
{
retval = argz_add(envz, envz_len, name);
}
return retval;
}
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