envz_merge.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_merge, (envz, envz_len, envz2, envz2_len, override),
char **envz _AND
size_t *envz_len _AND
const char *envz2 _AND
size_t envz2_len _AND
int override)
{
char *entry = NULL;
char *name_str = NULL;
char *val_str = NULL;
char *name_iter = NULL;
int retval = 0;
while((entry = argz_next((char *)envz2, envz2_len, entry)) && !retval)
{
if (!override)
{
name_str = strdup (entry);
name_iter = strchr(name_str, '=');
if(name_iter)
*name_iter = '\0';
if(!envz_entry(*envz, *envz_len, name_str))
{
retval = argz_add(envz, envz_len, entry);
}
free(name_str);
}
else
{
name_str = strdup (entry);
name_iter = strchr(name_str, '=');
if(name_iter)
{
*name_iter = '\0';
val_str = name_iter + 1;
}
else
{
val_str = NULL;
}
retval = envz_add(envz, envz_len, name_str, val_str);
}
}
return retval;
}
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