pwmtachtool/src/EINTR_wrappers.c - openbmc/openbmc-tools - Gitiles


 /*
 * File: EINTR_wrappers.c
 *
 * This file implements the wrapper functions for some of the System APIs
 *
 * Copyright (C) <2019>  <American Megatrends International LLC>
 *
 */

 #include "EINTR_wrappers.h"
 #if defined(__linux__)
 #include <sys/msg.h>
 #include <sys/file.h>
 #endif
 #include <errno.h>
 #include <unistd.h>

 static const int OneSecondasNS = 1000000000;

 #ifndef bool
 typedef int bool;
 #endif

 #ifndef TRUE
 #define TRUE (1)
 #endif

 #ifndef FALSE
 #define FALSE (0)
 #endif

 typedef struct
 {
 	bool OnePoll;
 	struct timespec EndTime, Timeout;
 } SIGWRAP_TIMEOUT;

 static void sigwrap_InitTimeout(SIGWRAP_TIMEOUT *pDst, const struct timespec *timeout)
 {
 	pDst->Timeout = *timeout;

 	if ((timeout->tv_sec == 0) && (timeout->tv_nsec == 0))                  // If both value are zero than only a single poll is requested!
 	{
 		pDst->OnePoll = 1;
 		return;
 	}

 	pDst->OnePoll = 0;

 	struct timespec Now;

 	(void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now);                         // CLOCK_MONOTONIC_RAW is not affected by NTP etc.

 	pDst->EndTime.tv_sec = Now.tv_sec + pDst->Timeout.tv_sec;               // Check necessary in 2038 due to signed integer variables
 	pDst->EndTime.tv_nsec = Now.tv_nsec + pDst->Timeout.tv_nsec;

 	if (pDst->EndTime.tv_nsec >= OneSecondasNS)
 	{
 		pDst->EndTime.tv_sec += (pDst->EndTime.tv_nsec / OneSecondasNS);
 		pDst->EndTime.tv_nsec = (pDst->EndTime.tv_nsec % OneSecondasNS);
 	}
 }


 static bool sigwrap_CheckTimeout(SIGWRAP_TIMEOUT *pTo)
 {
 	if (pTo->OnePoll == TRUE) // Make sure, that in the case that a single poll is requested at least one call is not terminated with EINTR
 		return FALSE;

 	struct timespec Now;

 	(void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now);

 	if (Now.tv_sec > pTo->EndTime.tv_sec) // Can become a problem already in 2038 due to signed integer variables
 		return TRUE;

 	pTo->Timeout.tv_nsec = pTo->EndTime.tv_nsec - Now.tv_nsec;
 	pTo->Timeout.tv_sec = pTo->EndTime.tv_sec - Now.tv_sec;

 	if (pTo->Timeout.tv_sec == 0)
 	{
 		if (pTo->Timeout.tv_nsec <= 0)
 			return TRUE;
 	}
 	else if (pTo->Timeout.tv_nsec < 0)
 	{
 		pTo->Timeout.tv_nsec += OneSecondasNS;
 		pTo->Timeout.tv_sec--;
 	}

 	return FALSE;
 }


 int sigwrap_semop(int semid, struct sembuf *sops, size_t nsops)
 {
 	while (1)
 	{
 		if (semop(semid, sops, nsops) == 0)
 			return 0;

 		if (errno != EINTR)
 			return -1;
 	}
 }

 int sigwrap_epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
 {
 	SIGWRAP_TIMEOUT To;

 	if (timeout != -1)
 	{
 		struct timespec Timeout;

 		Timeout.tv_sec = timeout / 1000;
 		Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec

 		sigwrap_InitTimeout(&To, &Timeout);
 	}

 	while (1)
 	{
 		int Result = epoll_wait(epfd, events, maxevents, timeout);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;

 		if (timeout == -1)
 			continue;

 		if (sigwrap_CheckTimeout(&To))
 			return 0;

 		timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
 	}
 }


 int sigwrap_epoll_pwait(int epfd, struct epoll_event *events, int maxevents, int timeout, const sigset_t *sigmask)
 {
 	SIGWRAP_TIMEOUT To;

 	if (timeout != -1)
 	{
 		struct timespec Timeout;

 		Timeout.tv_sec = timeout / 1000;
 		Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec

 		sigwrap_InitTimeout(&To, &Timeout);
 	}

 	while (1)
 	{
 		int Result = epoll_pwait(epfd, events, maxevents, timeout, sigmask);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;

 		if (timeout == -1)
 			continue;

 		if (sigwrap_CheckTimeout(&To))
 			return 0;

 		timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
 	}
 }


 int sigwrap_sigwaitinfo(const sigset_t *set, siginfo_t *info)
 {
 	while (1)
 	{
 		int Result = sigwaitinfo(set, info);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_sigtimedwait(const sigset_t *set, siginfo_t *info, const struct timespec *timeout)
 {
 	SIGWRAP_TIMEOUT To;

 	sigwrap_InitTimeout(&To, timeout);

 	while (1)
 	{
 		int Result = sigtimedwait(set, info, &To.Timeout);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;

 		if (sigwrap_CheckTimeout(&To))
 			return 0;
 	}
 }


 int sigwrap_nanosleep(const struct timespec *req, struct timespec *rem)
 {
 	struct timespec Wait, Remain;

 	if (!rem)
 		rem = &Remain;

 	Wait = *req;

 	while (1)
 	{
 		if (nanosleep(&Wait, rem) == 0)
 			return 0;

 		if (errno != EINTR)
 			return -1;

 		Wait = *rem;
 	}
 }


 int sigwrap_clock_nanosleep(clockid_t clock_id, int flags, const struct timespec *request, struct timespec *remain)
 {
 	struct timespec Wait, Remain;

 	if (!remain)
 		remain = &Remain;

 	Wait = *request;

 	while (1)
 	{
 		int Result = clock_nanosleep(clock_id, flags, &Wait, remain);

 		if (Result == 0)
 			return Result;

 		if (Result != EINTR)
 			return Result;

 		if (flags != TIMER_ABSTIME)
 			Wait = *remain;
 	}
 }


 int sigwrap_usleep(useconds_t usec)
 {
 	SIGWRAP_TIMEOUT To;

 	struct timespec Timeout;

 	Timeout.tv_sec = usec / 1000000;
 	Timeout.tv_nsec = (usec % 1000000) * 1000;

 	sigwrap_InitTimeout(&To, &Timeout);

 	while (1)
 	{
 		if (usleep(usec) == 0)
 			return 0;

 		if (errno != EINTR)
 			return -1;

 		if (sigwrap_CheckTimeout(&To))
 			return 0;

 		usec = To.Timeout.tv_sec * 1000000 + To.Timeout.tv_nsec / 1000;
 	}
 }


 int sigwrap_poll(struct pollfd *fds, nfds_t nfds, int timeout)
 {
 	SIGWRAP_TIMEOUT To;

 	if (timeout > 0)
 	{
 		struct timespec Timeout;

 		Timeout.tv_sec = timeout / 1000;
 		Timeout.tv_nsec = (timeout % 1000) * 1000000;

 		sigwrap_InitTimeout(&To, &Timeout);
 	}

 	while (1)
 	{
 		int Result = poll(fds, nfds, timeout);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;

 		if (timeout < 0) // Specifying a negative value in timeout means an infinite/no timeout.
 			continue;
 		else if (timeout == 0)
 			continue; // We want to make sure that at least one check was not aborted with EINTR

 		if (sigwrap_CheckTimeout(&To))
 			return 0;

 		timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
 	}
 }

 int sigwrap_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
 {
 	while (1)
 	{
 		int Result = select(nfds, readfds, writefds, exceptfds, timeout);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timespec *timeout,
 		const sigset_t *sigmask)
 {
 	SIGWRAP_TIMEOUT To;

 	if (timeout != NULL)
 	{
 		sigwrap_InitTimeout(&To, timeout);
 		timeout = &To.Timeout;
 	}

 	while (1)
 	{
 		int Result = pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;

 		if (timeout == NULL)
 			continue;

 		if (sigwrap_CheckTimeout(&To))
 			return 0;
 	}
 }


 int sigwrap_msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg)
 {
 	while (1)
 	{
 		int Result = msgsnd(msqid, msgp, msgsz, msgflg);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 ssize_t sigwrap_msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
 {
 	while (1)
 	{
 		ssize_t Result = msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
 {
 	while (1)
 	{
 		int Result = connect(sockfd, addr, addrlen);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 ssize_t sigwrap_send(int sockfd, const void *buf, size_t len, int flags)
 {
 	while (1)
 	{
 		ssize_t Result = send(sockfd, buf, len, flags);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 ssize_t sigwrap_sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr,
 		socklen_t addrlen)
 {
 	while (1)
 	{
 		ssize_t Result = sendto(sockfd, buf, len, flags, dest_addr, addrlen);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 ssize_t sigwrap_sendsendmsg(int sockfd, const struct msghdr *msg, int flags)
 {
 	while (1)
 	{
 		ssize_t Result = sendmsg(sockfd, msg, flags);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
 {
 	while (1)
 	{
 		int Result = accept(sockfd, addr, addrlen);

 		if (Result != -1)
 			return Result;

 		if (errno != EINTR)
 			return Result;
 	}
 }

 // EINTR wrapper for the standard read() function. Can be used for sockets that are the to non-blocking mode.
 // The length of the returned data can be shorter than the requested one!

 ssize_t sigwrap_read(int fd, void *buf, size_t count)
 {
 	while (1)
 	{
 		ssize_t Result = read(fd, buf, count);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 // EINTR wrapper for the standard read() function. Waits until ALL requested data is available. Use the non-blocking version (sigwrap_read)
 // for sockets that are set to non-blocking mode or when partial data is okay
 // Although the description for the read() function describes it differently, it seems possible that the original function may already return
 // even though partial data has already been read. This implementation makes sure that all requested data have been read.
 // See the comment in the signal description https://linux.die.net/man/7/signal
 //* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices.
 //* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket.
 //* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
 //* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred).

 ssize_t sigwrap_blocking_read(int hFile, void *pData, size_t RdLen)
 {
 	ssize_t Transfered;
 	ssize_t Len = RdLen;

 	while ((Transfered = read(hFile, pData, Len)) != Len)
 	{
 		if (Transfered == 0) // EOF reached?
 			return 0;

 		if (Transfered != -1)
 		{
 			pData += Transfered;
 			Len -= Transfered;
 			continue;
 		}

 		if (errno != EINTR)
 			return -1;
 	}

 	return RdLen;
 }


 ssize_t sigwrap_readv(int fd, const struct iovec *iov, int iovcnt)
 {
 	while (1)
 	{
 		ssize_t Result = readv(fd, iov, iovcnt);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 ssize_t sigwrap_recv(int sockfd, void *buf, size_t len, int flags)
 {
 	while (1)
 	{
 		ssize_t Result = recv(sockfd, buf, len, flags);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 ssize_t sigwrap_recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen)
 {
 	while (1)
 	{
 		ssize_t Result = recvfrom(sockfd, buf, len, flags, src_addr, addrlen);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 ssize_t sigwrap_recvmsg(int sockfd, struct msghdr *msg, int flags)
 {
 	while (1)
 	{
 		ssize_t Result = recvmsg(sockfd, msg, flags);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 // EINTR wrapper for the standard write() function. Can be used for sockets that are the to non-blocking mode.
 // The length of the effectively written data can be shorter than the length specified at the function call!

 ssize_t sigwrap_write(int fd, const void *buf, size_t count)
 {
 	while (1)
 	{
 		ssize_t Result = write(fd, buf, count);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }

 // EINTR wrapper for the standard write() function. Waits until ALL data is written! Use the non-blocking version (sigwrap_write)
 // for sockets that are set to non-blocking mode, or when it is OK to write only partial data.
 // Although the description for the write() function describes it differently, it seems possible that the original function may already return
 // even though partial data has already been written. This implementation makes sure that all requested data have been written.
 // See the comment in the signal description https://linux.die.net/man/7/signal
 //* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices.
 //* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket.
 //* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
 //* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred).

 ssize_t sigwrap_blocking_write(int hFile, const void *pData, ssize_t WrtLen)
 {
 	ssize_t Written;
 	ssize_t Len = WrtLen;

 	while ((Written = write(hFile, pData, Len)) != Len)
 	{
 		if (Written != -1)
 		{
 			pData += Written;
 			Len -= Written;
 			continue;
 		}

 		if (errno != EINTR)
 			return -1;
 	}

 	return WrtLen;
 }


 ssize_t sigwrap_writev(int fd, const struct iovec *iov, int iovcnt)
 {
 	while (1)
 	{
 		ssize_t Result = writev(fd, iov, iovcnt);

 		if (Result != -1)
 			return (Result);

 		if (errno != EINTR)
 			return (Result);
 	}
 }


 int sigwrap_close(int hFile)
 {
 	while (close(hFile) == -1)
 	{
 		if (errno != EINTR)
 			return -1;
 	}

 	return 0;
 }


 int sigwrap_open_mode(const char *pathname, int flags, mode_t mode)
 {
 	while (1)
 	{
 		int hFile = open(pathname, flags, mode);

 		if(hFile != -1)
 			return hFile;

 		if (errno != EINTR)
 			return hFile;
 	}
 }

 int sigwrap_open(const char *pathname, int flags)
 {
 	while (1)
 	{
 		int hFile = open(pathname, flags);

 		if(hFile != -1)
 			return hFile;

 		if (errno != EINTR)
 			return hFile;
 	}
 }


 pid_t sigwrap_wait(int *status)
 {
 	while(1)
 	{
 		pid_t Result = wait(status);

 		if(Result != -1)
 			return Result;

 		if(errno != EINTR)
 			return Result;
 	}
 }


 pid_t sigwrap_waitpid(pid_t pid, int *status, int options)
 {
 	while(1)
 	{
 		pid_t Result = waitpid(pid, status, options);

 		if(Result != -1)
 			return Result;

 		if(errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
 {
 	while(1)
 	{
 		int Result = waitid(idtype, id, infop, options);

 		if(Result != -1)
 			return Result;

 		if(errno != EINTR)
 			return Result;
 	}
 }


 int sigwrap_flock(int fd, int operation)
 {
 	while(1)
 	{
 		int Result = flock(fd, operation);

 		if(Result != -1)
 			return Result;

 		if(errno != EINTR)
 			return Result;
 	}
 }

	/*
	* File: EINTR_wrappers.c
	*
	* This file implements the wrapper functions for some of the System APIs
	*
	* Copyright (C) <2019> <American Megatrends International LLC>
	*
	*/

	#include "EINTR_wrappers.h"
	#if defined(__linux__)
	#include <sys/msg.h>
	#include <sys/file.h>
	#endif
	#include <errno.h>
	#include <unistd.h>

	static const int OneSecondasNS = 1000000000;

	#ifndef bool
	typedef int bool;
	#endif

	#ifndef TRUE
	#define TRUE (1)
	#endif

	#ifndef FALSE
	#define FALSE (0)
	#endif

	typedef struct
	{
	bool OnePoll;
	struct timespec EndTime, Timeout;
	} SIGWRAP_TIMEOUT;

	static void sigwrap_InitTimeout(SIGWRAP_TIMEOUT pDst, const struct timespec timeout)
	{
	pDst->Timeout = *timeout;

	if ((timeout->tv_sec == 0) && (timeout->tv_nsec == 0)) // If both value are zero than only a single poll is requested!
	{
	pDst->OnePoll = 1;
	return;
	}

	pDst->OnePoll = 0;

	struct timespec Now;

	(void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now); // CLOCK_MONOTONIC_RAW is not affected by NTP etc.

	pDst->EndTime.tv_sec = Now.tv_sec + pDst->Timeout.tv_sec; // Check necessary in 2038 due to signed integer variables
	pDst->EndTime.tv_nsec = Now.tv_nsec + pDst->Timeout.tv_nsec;

	if (pDst->EndTime.tv_nsec >= OneSecondasNS)
	{
	pDst->EndTime.tv_sec += (pDst->EndTime.tv_nsec / OneSecondasNS);
	pDst->EndTime.tv_nsec = (pDst->EndTime.tv_nsec % OneSecondasNS);
	}
	}


	static bool sigwrap_CheckTimeout(SIGWRAP_TIMEOUT *pTo)
	{
	if (pTo->OnePoll == TRUE) // Make sure, that in the case that a single poll is requested at least one call is not terminated with EINTR
	return FALSE;

	struct timespec Now;

	(void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now);

	if (Now.tv_sec > pTo->EndTime.tv_sec) // Can become a problem already in 2038 due to signed integer variables
	return TRUE;

	pTo->Timeout.tv_nsec = pTo->EndTime.tv_nsec - Now.tv_nsec;
	pTo->Timeout.tv_sec = pTo->EndTime.tv_sec - Now.tv_sec;

	if (pTo->Timeout.tv_sec == 0)
	{
	if (pTo->Timeout.tv_nsec <= 0)
	return TRUE;
	}
	else if (pTo->Timeout.tv_nsec < 0)
	{
	pTo->Timeout.tv_nsec += OneSecondasNS;
	pTo->Timeout.tv_sec--;
	}

	return FALSE;
	}



	int sigwrap_semop(int semid, struct sembuf *sops, size_t nsops)
	{
	while (1)
	{
	if (semop(semid, sops, nsops) == 0)
	return 0;

	if (errno != EINTR)
	return -1;
	}
	}

	int sigwrap_epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
	{
	SIGWRAP_TIMEOUT To;

	if (timeout != -1)
	{
	struct timespec Timeout;

	Timeout.tv_sec = timeout / 1000;
	Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec

	sigwrap_InitTimeout(&To, &Timeout);
	}

	while (1)
	{
	int Result = epoll_wait(epfd, events, maxevents, timeout);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;

	if (timeout == -1)
	continue;

	if (sigwrap_CheckTimeout(&To))
	return 0;

	timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
	}
	}


	int sigwrap_epoll_pwait(int epfd, struct epoll_event events, int maxevents, int timeout, const sigset_t sigmask)
	{
	SIGWRAP_TIMEOUT To;

	if (timeout != -1)
	{
	struct timespec Timeout;

	Timeout.tv_sec = timeout / 1000;
	Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec

	sigwrap_InitTimeout(&To, &Timeout);
	}

	while (1)
	{
	int Result = epoll_pwait(epfd, events, maxevents, timeout, sigmask);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;

	if (timeout == -1)
	continue;

	if (sigwrap_CheckTimeout(&To))
	return 0;

	timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
	}
	}


	int sigwrap_sigwaitinfo(const sigset_t set, siginfo_t info)
	{
	while (1)
	{
	int Result = sigwaitinfo(set, info);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	int sigwrap_sigtimedwait(const sigset_t set, siginfo_t info, const struct timespec *timeout)
	{
	SIGWRAP_TIMEOUT To;

	sigwrap_InitTimeout(&To, timeout);

	while (1)
	{
	int Result = sigtimedwait(set, info, &To.Timeout);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;

	if (sigwrap_CheckTimeout(&To))
	return 0;
	}
	}


	int sigwrap_nanosleep(const struct timespec req, struct timespec rem)
	{
	struct timespec Wait, Remain;

	if (!rem)
	rem = &Remain;

	Wait = *req;

	while (1)
	{
	if (nanosleep(&Wait, rem) == 0)
	return 0;

	if (errno != EINTR)
	return -1;

	Wait = *rem;
	}
	}


	int sigwrap_clock_nanosleep(clockid_t clock_id, int flags, const struct timespec request, struct timespec remain)
	{
	struct timespec Wait, Remain;

	if (!remain)
	remain = &Remain;

	Wait = *request;

	while (1)
	{
	int Result = clock_nanosleep(clock_id, flags, &Wait, remain);

	if (Result == 0)
	return Result;

	if (Result != EINTR)
	return Result;

	if (flags != TIMER_ABSTIME)
	Wait = *remain;
	}
	}


	int sigwrap_usleep(useconds_t usec)
	{
	SIGWRAP_TIMEOUT To;

	struct timespec Timeout;

	Timeout.tv_sec = usec / 1000000;
	Timeout.tv_nsec = (usec % 1000000) * 1000;

	sigwrap_InitTimeout(&To, &Timeout);

	while (1)
	{
	if (usleep(usec) == 0)
	return 0;

	if (errno != EINTR)
	return -1;

	if (sigwrap_CheckTimeout(&To))
	return 0;

	usec = To.Timeout.tv_sec * 1000000 + To.Timeout.tv_nsec / 1000;
	}
	}


	int sigwrap_poll(struct pollfd *fds, nfds_t nfds, int timeout)
	{
	SIGWRAP_TIMEOUT To;

	if (timeout > 0)
	{
	struct timespec Timeout;

	Timeout.tv_sec = timeout / 1000;
	Timeout.tv_nsec = (timeout % 1000) * 1000000;

	sigwrap_InitTimeout(&To, &Timeout);
	}

	while (1)
	{
	int Result = poll(fds, nfds, timeout);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;

	if (timeout < 0) // Specifying a negative value in timeout means an infinite/no timeout.
	continue;
	else if (timeout == 0)
	continue; // We want to make sure that at least one check was not aborted with EINTR

	if (sigwrap_CheckTimeout(&To))
	return 0;

	timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
	}
	}

	int sigwrap_select(int nfds, fd_set readfds, fd_set writefds, fd_set exceptfds, struct timeval timeout)
	{
	while (1)
	{
	int Result = select(nfds, readfds, writefds, exceptfds, timeout);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	int sigwrap_pselect(int nfds, fd_set readfds, fd_set writefds, fd_set exceptfds, const struct timespec timeout,
	const sigset_t *sigmask)
	{
	SIGWRAP_TIMEOUT To;

	if (timeout != NULL)
	{
	sigwrap_InitTimeout(&To, timeout);
	timeout = &To.Timeout;
	}

	while (1)
	{
	int Result = pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;

	if (timeout == NULL)
	continue;

	if (sigwrap_CheckTimeout(&To))
	return 0;
	}
	}


	int sigwrap_msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg)
	{
	while (1)
	{
	int Result = msgsnd(msqid, msgp, msgsz, msgflg);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	ssize_t sigwrap_msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
	{
	while (1)
	{
	ssize_t Result = msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	int sigwrap_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
	{
	while (1)
	{
	int Result = connect(sockfd, addr, addrlen);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	ssize_t sigwrap_send(int sockfd, const void *buf, size_t len, int flags)
	{
	while (1)
	{
	ssize_t Result = send(sockfd, buf, len, flags);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	ssize_t sigwrap_sendto(int sockfd, const void buf, size_t len, int flags, const struct sockaddr dest_addr,
	socklen_t addrlen)
	{
	while (1)
	{
	ssize_t Result = sendto(sockfd, buf, len, flags, dest_addr, addrlen);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	ssize_t sigwrap_sendsendmsg(int sockfd, const struct msghdr *msg, int flags)
	{
	while (1)
	{
	ssize_t Result = sendmsg(sockfd, msg, flags);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}


	int sigwrap_accept(int sockfd, struct sockaddr addr, socklen_t addrlen)
	{
	while (1)
	{
	int Result = accept(sockfd, addr, addrlen);

	if (Result != -1)
	return Result;

	if (errno != EINTR)
	return Result;
	}
	}

	// EINTR wrapper for the standard read() function. Can be used for sockets that are the to non-blocking mode.
	// The length of the returned data can be shorter than the requested one!

	ssize_t sigwrap_read(int fd, void *buf, size_t count)
	{
	while (1)
	{
	ssize_t Result = read(fd, buf, count);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	// EINTR wrapper for the standard read() function. Waits until ALL requested data is available. Use the non-blocking version (sigwrap_read)
	// for sockets that are set to non-blocking mode or when partial data is okay
	// Although the description for the read() function describes it differently, it seems possible that the original function may already return
	// even though partial data has already been read. This implementation makes sure that all requested data have been read.
	// See the comment in the signal description https://linux.die.net/man/7/signal
	//* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices.
	//* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket.
	//* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
	//* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred).

	ssize_t sigwrap_blocking_read(int hFile, void *pData, size_t RdLen)
	{
	ssize_t Transfered;
	ssize_t Len = RdLen;

	while ((Transfered = read(hFile, pData, Len)) != Len)
	{
	if (Transfered == 0) // EOF reached?
	return 0;

	if (Transfered != -1)
	{
	pData += Transfered;
	Len -= Transfered;
	continue;
	}

	if (errno != EINTR)
	return -1;
	}

	return RdLen;
	}


	ssize_t sigwrap_readv(int fd, const struct iovec *iov, int iovcnt)
	{
	while (1)
	{
	ssize_t Result = readv(fd, iov, iovcnt);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	ssize_t sigwrap_recv(int sockfd, void *buf, size_t len, int flags)
	{
	while (1)
	{
	ssize_t Result = recv(sockfd, buf, len, flags);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	ssize_t sigwrap_recvfrom(int sockfd, void buf, size_t len, int flags, struct sockaddr src_addr, socklen_t *addrlen)
	{
	while (1)
	{
	ssize_t Result = recvfrom(sockfd, buf, len, flags, src_addr, addrlen);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	ssize_t sigwrap_recvmsg(int sockfd, struct msghdr *msg, int flags)
	{
	while (1)
	{
	ssize_t Result = recvmsg(sockfd, msg, flags);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	// EINTR wrapper for the standard write() function. Can be used for sockets that are the to non-blocking mode.
	// The length of the effectively written data can be shorter than the length specified at the function call!

	ssize_t sigwrap_write(int fd, const void *buf, size_t count)
	{
	while (1)
	{
	ssize_t Result = write(fd, buf, count);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}

	// EINTR wrapper for the standard write() function. Waits until ALL data is written! Use the non-blocking version (sigwrap_write)
	// for sockets that are set to non-blocking mode, or when it is OK to write only partial data.
	// Although the description for the write() function describes it differently, it seems possible that the original function may already return
	// even though partial data has already been written. This implementation makes sure that all requested data have been written.
	// See the comment in the signal description https://linux.die.net/man/7/signal
	//* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices.
	//* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket.
	//* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
	//* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred).

	ssize_t sigwrap_blocking_write(int hFile, const void *pData, ssize_t WrtLen)
	{
	ssize_t Written;
	ssize_t Len = WrtLen;

	while ((Written = write(hFile, pData, Len)) != Len)
	{
	if (Written != -1)
	{
	pData += Written;
	Len -= Written;
	continue;
	}

	if (errno != EINTR)
	return -1;
	}

	return WrtLen;
	}


	ssize_t sigwrap_writev(int fd, const struct iovec *iov, int iovcnt)
	{
	while (1)
	{
	ssize_t Result = writev(fd, iov, iovcnt);

	if (Result != -1)
	return (Result);

	if (errno != EINTR)
	return (Result);
	}
	}


	int sigwrap_close(int hFile)
	{
	while (close(hFile) == -1)
	{
	if (errno != EINTR)
	return -1;
	}

	return 0;
	}


	int sigwrap_open_mode(const char *pathname, int flags, mode_t mode)
	{
	while (1)
	{
	int hFile = open(pathname, flags, mode);

	if(hFile != -1)
	return hFile;

	if (errno != EINTR)
	return hFile;
	}
	}

	int sigwrap_open(const char *pathname, int flags)
	{
	while (1)
	{
	int hFile = open(pathname, flags);

	if(hFile != -1)
	return hFile;

	if (errno != EINTR)
	return hFile;
	}
	}


	pid_t sigwrap_wait(int *status)
	{
	while(1)
	{
	pid_t Result = wait(status);

	if(Result != -1)
	return Result;

	if(errno != EINTR)
	return Result;
	}
	}


	pid_t sigwrap_waitpid(pid_t pid, int *status, int options)
	{
	while(1)
	{
	pid_t Result = waitpid(pid, status, options);

	if(Result != -1)
	return Result;

	if(errno != EINTR)
	return Result;
	}
	}


	int sigwrap_waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
	{
	while(1)
	{
	int Result = waitid(idtype, id, infop, options);

	if(Result != -1)
	return Result;

	if(errno != EINTR)
	return Result;
	}
	}


	int sigwrap_flock(int fd, int operation)
	{
	while(1)
	{
	int Result = flock(fd, operation);

	if(Result != -1)
	return Result;

	if(errno != EINTR)
	return Result;
	}
	}