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