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https://git.rtems.org/rtems-libbsd/
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Import DHCPCD(8) from: http://roy.marples.name/projects/dhcpcd/ The upstream sources can be obtained via: fossil clone http://roy.marples.name/projects/dhcpcd The imported version is 2014-01-29 19:46:44 [6b209507bb].
64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2013 Roy Marples <roy@marples.name>
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* All rights reserved
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/time.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <poll.h>
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#include <signal.h>
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#include <unistd.h>
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#include "pollts.h"
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#warning "This pollts(2) implementation is not entirely race condition safe."
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#warning "Only operating system support for pollts(2) can correct this."
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int
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pollts(struct pollfd *restrict fds, nfds_t nfds,
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const struct timespec *restrict ts, const sigset_t *restrict sigmask)
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{
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int r, timeout;
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sigset_t oldset;
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if (ts == NULL)
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timeout = -1;
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else if (ts->tv_sec > INT_MAX / 1000 ||
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(ts->tv_sec == INT_MAX / 1000 &&
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(ts->tv_nsec + 999999) / 1000000 > INT_MAX % 1000000))
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timeout = INT_MAX;
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else
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timeout = ts->tv_sec * 1000 + (ts->tv_nsec + 999999) / 1000000;
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if (sigmask && sigprocmask(SIG_SETMASK, sigmask, &oldset) == -1)
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return -1;
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r = poll(fds, nfds, timeout);
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if (sigmask && sigprocmask(SIG_SETMASK, &oldset, NULL) == -1)
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return -1;
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return r;
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}
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