1 /* $NetBSD: write_pid.c,v 1.1.1.1 2011/04/13 18:15:44 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <krb5/roken.h> 39 40 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL 41 pid_file_write (const char *progname) 42 { 43 char *ret = NULL; 44 FILE *fp; 45 46 if (asprintf (&ret, "%s%s.pid", _PATH_VARRUN, progname) < 0 || ret == NULL) 47 return NULL; 48 fp = fopen (ret, "w"); 49 if (fp == NULL) { 50 free (ret); 51 return NULL; 52 } 53 fprintf (fp, "%u", (unsigned)getpid()); 54 fclose (fp); 55 return ret; 56 } 57 58 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 59 pid_file_delete (char **filename) 60 { 61 if (*filename != NULL) { 62 unlink (*filename); 63 free (*filename); 64 *filename = NULL; 65 } 66 } 67 68 #ifndef HAVE_PIDFILE 69 static char *pidfile_path; 70 71 static void 72 pidfile_cleanup(void) 73 { 74 if(pidfile_path != NULL) 75 pid_file_delete(&pidfile_path); 76 } 77 78 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 79 pidfile(const char *basename) 80 { 81 if(pidfile_path != NULL) 82 return; 83 if(basename == NULL) 84 basename = getprogname(); 85 pidfile_path = pid_file_write(basename); 86 #if defined(HAVE_ATEXIT) 87 atexit(pidfile_cleanup); 88 #elif defined(HAVE_ON_EXIT) 89 on_exit(pidfile_cleanup); 90 #endif 91 } 92 #endif 93