forked from enlightenment/efl
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include <stdio.h>
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#ifdef _MSC_VER
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# include <io.h> /* for _get_osfhandle _lseek and _locking */
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#endif
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#include <sys/locking.h>
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#include <winsock2.h> /* for ioctlsocket */
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#include "Evil.h"
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/*
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* port of fcntl function
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*
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*/
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int fcntl(int fd, int cmd, ...)
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{
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va_list va;
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int res = -1;
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va_start (va, cmd);
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if (cmd == F_GETFD)
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{
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HANDLE h;
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DWORD flag;
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h = (HANDLE)_get_osfhandle(fd);
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if (h == INVALID_HANDLE_VALUE)
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return -1;
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if (!GetHandleInformation(h, &flag))
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{
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/* FIXME: should we close h ? MSDN seems to say that */
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return -1;
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}
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res = 0;
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}
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if (cmd == F_SETFD)
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{
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HANDLE h;
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long flag;
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h = (HANDLE)_get_osfhandle(fd);
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if (h == INVALID_HANDLE_VALUE)
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return -1;
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flag = va_arg(va, long);
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if (flag == FD_CLOEXEC)
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{
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if (SetHandleInformation(h, HANDLE_FLAG_INHERIT, 0))
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res = 0;
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}
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}
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else if (cmd == F_GETFL)
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{
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/* does nothing*/
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}
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else if (cmd == F_SETFL)
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{
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long flag;
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flag = va_arg(va, long);
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if (flag & O_NONBLOCK)
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{
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u_long arg = 1;
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int type;
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int len;
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int ret;
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len = (int)sizeof(int);
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ret = getsockopt((SOCKET)fd, SOL_SOCKET, SO_TYPE, (char *)&type, &len);
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if (!ret && (type == SOCK_STREAM))
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{
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if (ioctlsocket((SOCKET)fd, FIONBIO, &arg) != SOCKET_ERROR)
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res = 0;
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}
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}
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}
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else if ((cmd == F_SETLK) || (cmd == F_SETLKW))
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{
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struct flock *fl;
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off_t length = 0;
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long pos;
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fl = va_arg(va, struct flock *);
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if (fl->l_len == 0)
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{
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length = _lseek(fd, 0L, SEEK_END);
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if (length != -1L)
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res = 0;
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}
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fl->l_len = length - fl->l_start - 1;
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pos = _lseek(fd, fl->l_start, fl->l_whence);
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if (pos != -1L)
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res = 0;
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if ((fl->l_type == F_RDLCK) || (fl->l_type == F_WRLCK))
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{
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if (cmd == F_SETLK)
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res = _locking(fd, _LK_NBLCK, fl->l_len); /* if cannot be locked, we return immediatly */
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else /* F_SETLKW */
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res = _locking(fd, _LK_LOCK, fl->l_len); /* otherwise, we try several times */
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}
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if (fl->l_type == F_UNLCK)
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res = _locking(fd, _LK_UNLCK, fl->l_len);
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}
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va_end(va);
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return res;
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}
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