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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "gis.h"
/*******************************************************************
* G_putenv (name, value)
* const char *name, *value
*
* this routine sets the UNIX environment variable name to value
******************************************************************/
extern char **environ;
void G_putenv(const char *name, const char *value)
{
char buf[1024];
#if defined(HAVE_PUTENV)
sprintf(buf, "%s=%s", name, value);
putenv(G_store(buf));
#elif defined(HAVE_SETENV)
setenv(name, value, 1);
#else
static int first = 1;
int i;
char **newenv;
char *env;
if (first)
{
for (i = 0; environ[i]; i++)
;
newenv = (char **) G_malloc ((i + 1) * sizeof (char *));
for (i = 0; env = environ[i], env; i++)
newenv[i] = G_store(env);
newenv[i] = NULL;
environ = newenv;
first = 0;
}
for (i = 0; env = environ[i], env; i++)
{
char temp[4];
if (sscanf(env, "%[^=]=%1s", buf, temp) < 1)
continue;
if (strcmp(buf, name) != 0)
continue;
G_free(env);
sprintf(buf, "%s=%s", name, value);
environ[i] = G_store(buf);
return;
}
environ = (char **) G_realloc(environ, (i + 2) * sizeof (char *));
sprintf(buf, "%s=%s", name, value);
environ[i++] = G_store(buf);
environ[i] = NULL;
#endif
}
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