src/lib/restrict-process-size.c

	restrict-process-size.c revision 726b298c52be6cd11fd6dd3aa3b981fec2562cf8
/* Copyright (c) 2002-2008 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "restrict-process-size.h"

#include <unistd.h>

void restrict_process_size(unsigned int size ATTR_UNUSED,
               unsigned int max_processes ATTR_UNUSED)
{
#ifdef HAVE_SETRLIMIT
    struct rlimit rlim;

#ifdef HAVE_RLIMIT_NPROC
    if (max_processes < INT_MAX) {
        rlim.rlim_max = rlim.rlim_cur = max_processes;
        if (setrlimit(RLIMIT_NPROC, &rlim) < 0)
            i_fatal("setrlimit(RLIMIT_NPROC, %u): %m", size);
    }
#endif

    if (size > 0 && size < INT_MAX/1024/1024) {
        rlim.rlim_max = rlim.rlim_cur = size*1024*1024;

        if (setrlimit(RLIMIT_DATA, &rlim) < 0)
            i_fatal("setrlimit(RLIMIT_DATA, %u): %m", size);

#ifdef HAVE_RLIMIT_AS
        if (setrlimit(RLIMIT_AS, &rlim) < 0)
            i_fatal("setrlimit(RLIMIT_AS, %u): %m", size);
#endif
    }
#else
    if (size != 0) {
        i_warning("Can't restrict process size: "
              "setrlimit() not supported by system. "
              "Set the limit to 0 to hide this warning.");
    }
#endif
}

void restrict_fd_limit(unsigned int count)
{
#ifdef HAVE_SETRLIMIT
    struct rlimit rlim;

    rlim.rlim_cur = rlim.rlim_max = count;
    if (setrlimit(RLIMIT_NOFILE, &rlim) < 0)
        i_error("setrlimit(RLIMIT_NOFILE, %u): %m", count);
#endif
}

int restrict_get_core_limit(rlim_t *limit_r)
{
#ifdef HAVE_RLIMIT_CORE
    struct rlimit rlim;

    if (getrlimit(RLIMIT_CORE, &rlim) < 0) {
        i_error("getrlimit(RLIMIT_CORE) failed: %m");
        return -1;
    }
    *limit_r = rlim.rlim_cur;
    return 0;
#else
    return -1;
#endif
}