ndhc/sys.h

/* sys.h - misc portable functions
 *
 * Copyright 2010-2020 Nicholas J. Kain <njkain at gmail dot com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */
#ifndef SYS_H_
#define SYS_H_

#include "ndhc-defines.h"

static inline size_t min_size_t(size_t a, size_t b)
{
    return a < b ? a : b;
}

#define curms() IMPL_curms(__func__)
long long IMPL_curms(const char *parent_function);

void setup_signals_subprocess(void);

#endif /* SYS_H_ */
Use poll() instead of epoll() for ndhc-master. 2020-10-20 05:54:00 -04:00			`/* sys.h - misc portable functions`
Massive cosmetic patch: update or add copyright headers, untabify, and change all unsigned char to uint8_t. 2011-03-30 23:59:22 -04:00			`*`
Stop using signalfd and audit signal handling code. There's really no advantage to using signalfd in ndhc, particularly since the normal POSIX signal API is now used for handling SIGCHLD in ndhc-master. So just use the tried and true volatile sig_atomic_t set and check approach. The only intended behavior change is in the dhcp RELEASE state -- before there would be a spurious attempt at renewing a nonexistent lease when the RENEW signal was received. 2020-10-20 04:23:55 -04:00			`* Copyright 2010-2020 Nicholas J. Kain <njkain at gmail dot com>`
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine. 2011-07-25 02:30:57 -04:00			`* All rights reserved.`
Massive cosmetic patch: update or add copyright headers, untabify, and change all unsigned char to uint8_t. 2011-03-30 23:59:22 -04:00			`*`
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine. 2011-07-25 02:30:57 -04:00			`* Redistribution and use in source and binary forms, with or without`
			`* modification, are permitted provided that the following conditions are met:`
Massive cosmetic patch: update or add copyright headers, untabify, and change all unsigned char to uint8_t. 2011-03-30 23:59:22 -04:00			`*`
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine. 2011-07-25 02:30:57 -04:00			`* - Redistributions of source code must retain the above copyright notice,`
			`* this list of conditions and the following disclaimer.`
Massive cosmetic patch: update or add copyright headers, untabify, and change all unsigned char to uint8_t. 2011-03-30 23:59:22 -04:00			`*`
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine. 2011-07-25 02:30:57 -04:00			`* - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.`
Massive cosmetic patch: update or add copyright headers, untabify, and change all unsigned char to uint8_t. 2011-03-30 23:59:22 -04:00			`*/`
Move background() to sys.[ch]. 2010-12-24 09:47:09 -05:00			`#ifndef SYS_H_`
			`#define SYS_H_`

			`#include "ndhc-defines.h"`

Make ndhc RFC6842-compliant. All this entails is that ndhc needs to check to make sure that if the remote server sends a dhcp packet with a client identifier, the client identifier of that packet matches the client identifier that ndhc uses to identify itself. If the remote server does not attach a client identifier to its dhcp packets, then the behavior of ndhc does not change. 2014-03-18 03:13:51 -04:00			`static inline size_t min_size_t(size_t a, size_t b)`
			`{`
			`return a < b ? a : b;`
			`}`

Handle possible clock_gettime() errors in curms(). Use curms() instead of new clock_gettime() call points, too. 2017-02-24 08:51:36 -05:00			`#define curms() IMPL_curms(__func__)`
			`long long IMPL_curms(const char *parent_function);`
Move background() to sys.[ch]. 2010-12-24 09:47:09 -05:00
Stop using signalfd and audit signal handling code. There's really no advantage to using signalfd in ndhc, particularly since the normal POSIX signal API is now used for handling SIGCHLD in ndhc-master. So just use the tried and true volatile sig_atomic_t set and check approach. The only intended behavior change is in the dhcp RELEASE state -- before there would be a spurious attempt at renewing a nonexistent lease when the RENEW signal was received. 2020-10-20 04:23:55 -04:00			`void setup_signals_subprocess(void);`
Make the signal handling code use safe_read() and unify ifchd and sockd signals code. 2014-04-15 20:55:13 -04:00
Move background() to sys.[ch]. 2010-12-24 09:47:09 -05:00			`#endif /* SYS_H_ */`
Make the signal handling code use safe_read() and unify ifchd and sockd signals code. 2014-04-15 20:55:13 -04:00