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Diffstat (limited to 'contrib/blacklist/port/pidfile.c')
| -rw-r--r-- | contrib/blacklist/port/pidfile.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/contrib/blacklist/port/pidfile.c b/contrib/blacklist/port/pidfile.c deleted file mode 100644 index 4deb2349d20a..000000000000 --- a/contrib/blacklist/port/pidfile.c +++ /dev/null @@ -1,183 +0,0 @@ -/* $NetBSD: pidfile.c,v 1.2 2016/04/05 12:28:57 christos Exp $ */ - -/*- - * Copyright (c) 1999 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Jason R. Thorpe, Matthias Scheler and Julio Merino. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <sys/cdefs.h> -#if defined(LIBC_SCCS) && !defined(lint) -__RCSID("$NetBSD: pidfile.c,v 1.2 2016/04/05 12:28:57 christos Exp $"); -#endif - -#include <sys/param.h> - -#include <paths.h> -#include <stdbool.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#ifdef HAVE_LIBUTIL_H -#include <libutil.h> -#endif -#ifdef HAVE_UTIL_H -#include <util.h> -#endif - -static pid_t pidfile_pid; -static char *pidfile_path; - -/* Deletes an existent pidfile iff it was created by this process. */ -static void -pidfile_cleanup(void) -{ - - if ((pidfile_path != NULL) && (pidfile_pid == getpid())) - (void) unlink(pidfile_path); -} - -/* Registers an atexit(3) handler to delete the pidfile we have generated. - * We only register the handler when we create a pidfile, so we can assume - * that the pidfile exists. - * - * Returns 0 on success or -1 if the handler could not be registered. */ -static int -register_atexit_handler(void) -{ - static bool done = false; - - if (!done) { - if (atexit(pidfile_cleanup) < 0) - return -1; - done = true; - } - - return 0; -} - -/* Given a new pidfile name in 'path', deletes any previously-created pidfile - * if the previous file differs to the new one. - * - * If a previous file is deleted, returns 1, which means that a new pidfile - * must be created. Otherwise, this returns 0, which means that the existing - * file does not need to be touched. */ -static int -cleanup_old_pidfile(const char* path) -{ - if (pidfile_path != NULL) { - if (strcmp(pidfile_path, path) != 0) { - pidfile_cleanup(); - - free(pidfile_path); - pidfile_path = NULL; - - return 1; - } else - return 0; - } else - return 1; -} - -/* Constructs a name for a pidfile in the default location (/var/run). If - * 'basename' is NULL, uses the name of the current program for the name of - * the pidfile. - * - * Returns a pointer to a dynamically-allocatd string containing the absolute - * path to the pidfile; NULL on failure. */ -static char * -generate_varrun_path(const char *bname) -{ - char *path; - - if (bname == NULL) - bname = getprogname(); - - /* _PATH_VARRUN includes trailing / */ - if (asprintf(&path, "%s%s.pid", _PATH_VARRUN, bname) == -1) - return NULL; - return path; -} - -/* Creates a pidfile with the provided name. The new pidfile is "registered" - * in the global variables pidfile_path and pidfile_pid so that any further - * call to pidfile(3) can check if we are recreating the same file or a new - * one. - * - * Returns 0 on success or -1 if there is any error. */ -static int -create_pidfile(const char* path) -{ - FILE *f; - - if (register_atexit_handler() == -1) - return -1; - - if (cleanup_old_pidfile(path) == 0) - return 0; - - pidfile_path = strdup(path); - if (pidfile_path == NULL) - return -1; - - if ((f = fopen(path, "w")) == NULL) { - free(pidfile_path); - pidfile_path = NULL; - return -1; - } - - pidfile_pid = getpid(); - - (void) fprintf(f, "%d\n", pidfile_pid); - (void) fclose(f); - - return 0; -} - -int -pidfile(const char *path) -{ - - if (path == NULL || strchr(path, '/') == NULL) { - char *default_path; - - if ((default_path = generate_varrun_path(path)) == NULL) - return -1; - - if (create_pidfile(default_path) == -1) { - free(default_path); - return -1; - } - - free(default_path); - return 0; - } else - return create_pidfile(path); -} |