src/lib/env-util.c

	env-util.c revision 8fa0258c986f227c159576eeb2a7c2fcb191a90e
/* 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;
    static char *emptyenv[1] = { NULL };

    /* Try to clear the environment.

       a) environ = NULL crashes on OS X.
       b) *environ = NULL doesn't work on FreeBSD 7.0.
       c) environ = emptyenv appears to work everywhere.
    */
    environ = emptyenv;
#endif
    /* don't clear the env_pool, otherwise the environment would get
       corrupted if we failed to clear it. */
}