84d70e63fc
The original idea with libcompat was to keep as few objects as possible for linking with libsyslog. That in turn to prevent a user of libsyslog from suddenly also getting strong binding to symbols like strlcpy() from libsyslog, rather than their C library of choice. However, this caused strlcpy.c to be built as both .o and .lo files, which in turn caused really bizarre build problems due to bad DAG dependency. This patch drops libcompat and instead marks all replacement APIs as weak symbols, which a C library can override. Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* Updated by troglobit for libite/finit/uftpd projects 2016/07/04 */
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/* $OpenBSD: pidfile.c,v 1.11 2015/06/03 02:24:36 millert Exp $ */
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/* $NetBSD: pidfile.c,v 1.4 2001/02/19 22:43:42 cgd Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ifndef HAVE_PIDFILE
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#define _GNU_SOURCE /* Needed with GLIBC to get asprintf() */
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#include <sys/stat.h> /* utimensat() */
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#include <sys/time.h> /* utimensat() on *BSD */
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "compat.h"
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#ifndef HAVE_UTIMENSAT
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int utimensat(int dirfd, const char *pathname, const struct timespec ts[2], int flags);
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#endif
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static char *pidfile_path = NULL;
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static pid_t pidfile_pid = 0;
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static void pidfile_cleanup(void);
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const char *__pidfile_path = RUNSTATEDIR;
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const char *__pidfile_name = NULL;
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int
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__pidfile(const char *basename)
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{
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int save_errno;
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int atexit_already;
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pid_t pid;
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FILE *f;
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if (basename == NULL)
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basename = getprogname();
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pid = getpid();
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atexit_already = 0;
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if (pidfile_path != NULL) {
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if (!access(pidfile_path, R_OK) && pid == pidfile_pid) {
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utimensat(0, pidfile_path, NULL, 0);
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return (0);
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}
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free(pidfile_path);
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pidfile_path = NULL;
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__pidfile_name = NULL;
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atexit_already = 1;
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}
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if (basename[0] != '/') {
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if (asprintf(&pidfile_path, "%s/%s.pid", __pidfile_path, basename) == -1)
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return (-1);
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} else {
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if (asprintf(&pidfile_path, "%s", basename) == -1)
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return (-1);
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}
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if ((f = fopen(pidfile_path, "w")) == NULL) {
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save_errno = errno;
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free(pidfile_path);
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pidfile_path = NULL;
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errno = save_errno;
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return (-1);
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}
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if (fprintf(f, "%ld\n", (long)pid) <= 0 || fflush(f) != 0) {
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save_errno = errno;
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(void) fclose(f);
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(void) unlink(pidfile_path);
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free(pidfile_path);
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pidfile_path = NULL;
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errno = save_errno;
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return (-1);
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}
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(void) fclose(f);
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__pidfile_name = pidfile_path;
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/*
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* LITE extension, no need to set up another atexit() handler
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* if user only called us to update the mtime of the PID file
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*/
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if (atexit_already)
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return (0);
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pidfile_pid = pid;
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if (atexit(pidfile_cleanup) < 0) {
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save_errno = errno;
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(void) unlink(pidfile_path);
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free(pidfile_path);
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pidfile_path = NULL;
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pidfile_pid = 0;
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errno = save_errno;
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return (-1);
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}
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return (0);
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}
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static void
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pidfile_cleanup(void)
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{
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if (pidfile_path != NULL && pidfile_pid == getpid()) {
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(void) unlink(pidfile_path);
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free(pidfile_path);
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pidfile_path = NULL;
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}
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}
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weak_alias(__pidfile, pidfile);
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#endif /* HAVE_PIDFILE */
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