src/lib/env-util.c

	env-util.c revision ec283ec7c45dcb0c7ae276203f4ba61570f8733a
/* Copyright (c) 2002-2008 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "env-util.h"

#include <stdlib.h>

static pool_t pool = NULL;

void env_put(const char *env)
{
    if (pool == NULL) {
        pool = pool_alloconly_create(MEMPOOL_GROWING"Environment",
                         2048);
    }
    if (putenv(p_strdup(pool, env)) != 0)
        i_fatal("putenv(%s) failed: %m", env);
}

void env_clean(void)
{
#ifdef HAVE_CLEARENV
    if (clearenv() < 0)
        i_fatal("clearenv() failed");
#else
    extern char **environ;

    /* Try to clear the environment. It should always be non-NULL, but
       apparently it's not on some ancient OSes (Ultrix), so just keep
       the check. The clearing also fails on FreeBSD 7.0 (currently). */
    if (environ != NULL)
        *environ = NULL;

#endif
    /* don't clear the env_pool, otherwise the environment would get
       corrupted if we failed to clear it. */
}