49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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This file is part of LibMaxsi.
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LibMaxsi is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details.
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You should have received a copy of the GNU Lesser General Public License
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along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
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read.cpp
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Reads from a file descriptor.
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*******************************************************************************/
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#include <libmaxsi/platform.h>
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#include <libmaxsi/syscall.h>
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#include <errno.h>
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#include <unistd.h>
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namespace Maxsi {
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DEFN_SYSCALL3(ssize_t, SysRead, SYSCALL_READ, int, void*, size_t);
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extern "C" ssize_t read(int fd, void* buf, size_t count)
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{
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retry:
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ssize_t result = SysRead(fd, buf, count);
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if ( result < 0 && errno == EAGAIN ) { goto retry; }
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return result;
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}
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extern "C" ssize_t pread(int, void*, size_t, off_t)
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{
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errno = ENOSYS;
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return -1;
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}
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} // namespace Maxsi
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