59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* Copyright (c) 2011, 2012, 2013, 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* stdio/fdio_install_fd.c
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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 <stdbool.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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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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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->fd = fd;
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fp->user = fp;
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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->close_func = fdio_close;
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return true;
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}
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