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72 lines
2 KiB
C++
72 lines
2 KiB
C++
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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stdio/fdio_install_fd.cpp
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Opens a FILE from a file descriptor.
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*******************************************************************************/
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "fdio.h"
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extern "C" bool fdio_install_fd(FILE* fp, int fd, const char* mode)
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{
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int mode_flags = fparsemode(mode);
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if ( mode_flags < 0 )
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return false;
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if ( !(mode_flags & (FILE_MODE_READ | FILE_MODE_WRITE)) )
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return errno = EINVAL, false;
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struct stat st;
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if ( fstat(fd, &st) == 0 &&
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(mode_flags & FILE_MODE_WRITE) &&
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S_ISDIR(st.st_mode) )
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return errno = EISDIR, false;
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struct fdio_state* fdio = (struct fdio_state*) malloc(sizeof(struct fdio_state));
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if ( !fdio )
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return false;
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fdio->free_indirect = free;
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fdio->fd = fd;
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if ( mode_flags & FILE_MODE_READ )
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fp->flags |= _FILE_READABLE;
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if ( mode_flags & FILE_MODE_WRITE )
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fp->flags |= _FILE_WRITABLE;
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fp->user = fdio;
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fp->reopen_func = fdio_reopen;
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fp->read_func = fdio_read;
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fp->write_func = fdio_write;
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fp->seek_func = fdio_seek;
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fp->fileno_func = fdio_fileno;
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fp->close_func = fdio_close;
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return true;
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}
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