Security-57031.1.35.tar.gz

[apple/security.git] / libsecurity_utilities / lib / daemon.cpp

diff --git a/libsecurity_utilities/lib/daemon.cpp b/libsecurity_utilities/lib/daemon.cpp
deleted file mode 100644 (file)
index c5b6642..0000000
--- a/libsecurity_utilities/lib/daemon.cpp
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// demon - support code for writing UNIXoid demons
-//
-#include <security_utilities/daemon.h>
-#include <security_utilities/logging.h>
-#include <security_utilities/debugging.h>
-#include <sys/types.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-namespace Security {
-namespace Daemon {
-
-
-//
-// Daemonize this process, the UNIX way.
-//
-bool incarnate(bool doFork /*=true*/)
-{
-       if (doFork) {
-               // fork with slight resilience
-               for (int forkTries = 1; forkTries <= 5; forkTries++) {
-                       switch (fork()) {
-                               case 0:                 // child
-                                                       // we are the daemon process (Har! Har!)
-                                       break;
-                               case -1:                // parent: fork failed
-                                       switch (errno) {
-                                               case EAGAIN:
-                                               case ENOMEM:
-                                                       Syslog::warning("fork() short on resources (errno=%d); retrying", errno);
-                                                       sleep(forkTries);
-                                                       continue;
-                                               default:
-                                                       Syslog::error("fork() failed (errno=%d)", errno);
-                                                       return false;
-                                       }
-                               default:                // parent
-                                                       // @@@ we could close an assurance loop here, but we don't (yet?)
-                                       exit(0);
-                       }
-               }
-               // fork succeeded; we are the child; parent is terminating
-       }
-       
-       // create new session (the magic set-me-apart system call)
-       setsid();
-
-       // redirect standard channels to /dev/null
-       close(0);       // fail silently in case 0 is closed
-       if (open("/dev/null", O_RDWR, 0) == 0) {        // /dev/null could be missing, I suppose...
-               dup2(0, 1);
-               dup2(0, 2);
-       }
-       
-       // ready to roll
-       return true;
-}
-
-
-//
-// Re-execute myself.
-// This is a pretty bad hack for libraries that are pretty broken and (essentially)
-// don't work after a fork() unless you also exec().
-//
-// WARNING: Don't even THINK of doing this in a setuid-anything program.
-//
-bool executeSelf(char **argv)
-{
-       static const char reExecEnv[] = "_RE_EXECUTE";
-       if (getenv(reExecEnv)) {                // was re-executed
-               secdebug("daemon", "self-execution complete");
-               unsetenv(reExecEnv);
-               return true;
-       } else {
-               setenv(reExecEnv, "go", 1);
-               secdebug("daemon", "self-executing (ouch!)");
-               execv(argv[0], argv);
-               perror("re-execution");
-               Syslog::error("Re-execution attempt failed");
-               return false;
-       }
-}
-
-
-} // end namespace Daemon
-} // end namespace Security