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