b48bed5f42
Tests that start daemons have to "wait" for them to start. This commit makes Heimdal daemons prep to detach (when requested) by forking early, then having the child signal readiness to the parent when the child really is ready. The parent exits only which the child is ready. This means that tests will no longer need to wait for daemons. However, tests will still need a pidfile or such so they can stop the daemons. Note that the --detach options should not be used on OS X from launchd, only from tests.
169 lines
4.5 KiB
C
169 lines
4.5 KiB
C
/*
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* Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kdc_locl.h"
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#ifdef HAVE_UTIL_H
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#include <util.h>
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#endif
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#ifdef HAVE_CAPNG
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#include <cap-ng.h>
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#endif
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sig_atomic_t exit_flag = 0;
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int detach_from_console = -1;
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int daemon_child = -1;
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static RETSIGTYPE
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sigterm(int sig)
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{
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exit_flag = sig;
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}
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/*
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* Allow dropping root bit, since heimdal reopens the database all the
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* time the database needs to be owned by the user you are switched
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* too. A better solution is to split the kdc in to more processes and
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* run the network facing part with very low privilege.
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*/
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static void
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switch_environment(void)
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{
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#ifdef HAVE_GETEUID
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if ((runas_string || chroot_string) && geteuid() != 0)
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errx(1, "no running as root, can't switch user/chroot");
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if (chroot_string) {
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if (chroot(chroot_string))
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err(1, "chroot(%s) failed", chroot_string);
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if (chdir("/"))
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err(1, "chdir(/) after chroot failed");
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}
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if (runas_string) {
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struct passwd *pw;
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pw = getpwnam(runas_string);
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if (pw == NULL)
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errx(1, "unknown user %s", runas_string);
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if (initgroups(pw->pw_name, pw->pw_gid) < 0)
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err(1, "initgroups failed");
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#ifndef HAVE_CAPNG
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if (setgid(pw->pw_gid) < 0)
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err(1, "setgid(%s) failed", runas_string);
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if (setuid(pw->pw_uid) < 0)
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err(1, "setuid(%s)", runas_string);
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#else
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capng_clear (CAPNG_EFFECTIVE | CAPNG_PERMITTED);
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if (capng_updatev (CAPNG_ADD, CAPNG_EFFECTIVE | CAPNG_PERMITTED,
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CAP_NET_BIND_SERVICE, CAP_SETPCAP, -1) < 0)
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err(1, "capng_updateev");
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if (capng_change_id(pw->pw_uid, pw->pw_gid,
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CAPNG_CLEAR_BOUNDING) < 0)
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err(1, "capng_change_id(%s)", runas_string);
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#endif
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}
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#endif
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}
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int
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main(int argc, char **argv)
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{
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krb5_error_code ret;
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krb5_context context;
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krb5_kdc_configuration *config;
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int optidx = 0;
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setprogname(argv[0]);
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ret = krb5_init_context(&context);
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if (ret == KRB5_CONFIG_BADFORMAT)
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errx (1, "krb5_init_context failed to parse configuration file");
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else if (ret)
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errx (1, "krb5_init_context failed: %d", ret);
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ret = krb5_kt_register(context, &hdb_get_kt_ops);
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if (ret)
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errx (1, "krb5_kt_register(HDB) failed: %d", ret);
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config = configure(context, argc, argv, &optidx);
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#ifdef HAVE_SIGACTION
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{
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struct sigaction sa;
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sa.sa_flags = 0;
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sa.sa_handler = sigterm;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGINT, &sa, NULL);
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sigaction(SIGTERM, &sa, NULL);
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#ifdef SIGXCPU
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sigaction(SIGXCPU, &sa, NULL);
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#endif
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sa.sa_handler = SIG_IGN;
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#ifdef SIGPIPE
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sigaction(SIGPIPE, &sa, NULL);
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#endif
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}
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#else
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signal(SIGINT, sigterm);
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signal(SIGTERM, sigterm);
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#ifdef SIGXCPU
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signal(SIGXCPU, sigterm);
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#endif
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#ifdef SIGPIPE
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signal(SIGPIPE, SIG_IGN);
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#endif
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#endif
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#ifdef __APPLE__
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bonjour_announce(context, config);
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#endif
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pidfile(NULL);
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switch_environment();
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loop(context, config);
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krb5_free_context(context);
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return 0;
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}
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