73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/* $NetBSD: read_file.c,v 1.4 2008/01/30 21:52:09 joerg Exp $ */
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/*-
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* Copyright (c) 2007 Joerg Sonnenberger <joerg@NetBSD.org>.
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* All rights reserved.
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*
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* This code was developed as part of Google's Summer of Code 2007 program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <nbcompat.h>
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#include <nbcompat/stat.h>
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#include <nbcompat/err.h>
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#include <fcntl.h>
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#include <nbcompat/limits.h>
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#include <nbcompat/string.h>
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#include <nbcompat/unistd.h>
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#include "pbulk.h"
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char *
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read_from_file(int fd)
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{
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struct stat sb;
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size_t input_len;
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ssize_t bytes_read;
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char *input;
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if (fstat(fd, &sb) == -1)
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err(1, "Cannot stat input");
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if ((sb.st_mode & S_IFMT) != S_IFREG)
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errx(1, "Input is not regular file");
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if (sb.st_size > SSIZE_MAX - 1)
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errx(1, "Input too large");
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input_len = (size_t)sb.st_size;
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input = xmalloc(input_len + 1);
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if ((bytes_read = read(fd, input, input_len)) == -1)
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err(1, "Failed to read input");
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if (bytes_read != sb.st_size)
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errx(1, "Unexpected short read");
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input[input_len] = '\0';
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if (strlen(input) != input_len)
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errx(1, "Invalid input (NUL character found)");
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return input;
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}
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