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/*
* Copyright (C) 2006-2007, 2010-2020 Free Software Foundation, Inc.
* Written by Simon Josefsson
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "read-file.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#define FILE1 "/etc/resolv.conf"
#define FILE2 "/dev/null"
int
main (void)
{
struct stat statbuf;
int err = 0;
/* We can perform the test only if the file exists and is readable.
Test whether it exists, then assume it is world-readable. */
if (stat (FILE1, &statbuf) >= 0)
{
size_t len;
char *out = read_file (FILE1, &len);
if (!out)
{
perror ("Could not read file");
err = 1;
}
else
{
if (out[len] != '\0')
{
perror ("BAD: out[len] not zero");
err = 1;
}
if (S_ISREG (statbuf.st_mode))
{
/* FILE1 is a regular file or a symlink to a regular file. */
if (len != statbuf.st_size)
{
fprintf (stderr, "Read %lu from %s...\n",
(unsigned long) len, FILE1);
err = 1;
}
}
else
{
/* Assume FILE1 is not empty. */
if (len == 0)
{
fprintf (stderr, "Read nothing from %s\n", FILE1);
err = 1;
}
}
free (out);
}
}
/* We can perform the test only if the file exists and is readable.
Test whether it exists, then assume it is world-readable. */
if (stat (FILE2, &statbuf) >= 0)
{
size_t len;
char *out = read_file (FILE2, &len);
if (!out)
{
perror ("Could not read file");
err = 1;
}
else
{
if (out[len] != '\0')
{
perror ("BAD: out[len] not zero");
err = 1;
}
/* /dev/null should always be empty. Ignore statbuf.st_size, since it
is not a regular file. */
if (len != 0)
{
fprintf (stderr, "Read %lu from %s...\n",
(unsigned long) len, FILE2);
err = 1;
}
free (out);
}
}
return err;
}
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