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/* basic fmemopen interface testing.
Copyright (C) 2014-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
static char *test_file;
static void
do_prepare (int argc, char *argv[])
{
/* Construct the test file name based on ARGV[0], which will be
an absolute file name in the build directory. Don't touch the
source directory, which might be read-only. */
if (asprintf (&test_file, "%s.test", argv[0]) < 0)
{
puts ("asprintf failed\n");
exit (EXIT_FAILURE);
}
}
static int
do_test (void)
{
const char blah[] = "BLAH";
FILE *fp;
char *mmap_data;
int ch, fd;
struct stat fs;
const char *cp;
/* setup the physical file, and use it */
if ((fp = fopen (test_file, "w+")) == NULL)
return 1;
if (fwrite (blah, 1, strlen (blah), fp) != strlen (blah))
{
fclose (fp);
return 2;
}
rewind (fp);
printf ("file: ");
cp = blah;
while ((ch = getc (fp)) != EOF)
{
fputc (ch, stdout);
if (ch != *cp)
{
printf ("\ncharacter %td: '%c' instead of '%c'\n",
cp - blah, ch, *cp);
fclose (fp);
return 1;
}
++cp;
}
fputc ('\n', stdout);
if (ferror (fp))
{
puts ("fp: error");
fclose (fp);
return 1;
}
if (feof (fp))
printf ("fp: EOF\n");
else
{
puts ("not EOF");
fclose (fp);
return 1;
}
fclose (fp);
/* Now, mmap the file into a buffer, and do that too */
if ((fd = open (test_file, O_RDONLY)) == -1)
{
printf ("open (%s, O_RDONLY) failed\n", test_file);
return 3;
}
if (fstat (fd, &fs) == -1)
{
printf ("stat (%i)\n", fd);
return 4;
}
if ((mmap_data = (char *) mmap (NULL, fs.st_size, PROT_READ,
MAP_SHARED, fd, 0)) == MAP_FAILED)
{
printf ("mmap (NULL, %zu, PROT_READ, MAP_SHARED, %i, 0) failed\n",
(size_t) fs.st_size, fd);
return 5;
}
if ((fp = fmemopen (mmap_data, fs.st_size, "r")) == NULL)
{
printf ("fmemopen (%p, %zu) failed\n", mmap_data, (size_t) fs.st_size);
return 1;
}
printf ("mem: ");
cp = blah;
while ((ch = getc (fp)) != EOF)
{
fputc (ch, stdout);
if (ch != *cp)
{
printf ("%td character: '%c' instead of '%c'\n",
cp - blah, ch, *cp);
fclose (fp);
return 1;
}
++cp;
}
fputc ('\n', stdout);
if (ferror (fp))
{
puts ("fp: error");
fclose (fp);
return 1;
}
if (feof (fp))
printf ("fp: EOF\n");
else
{
puts ("not EOF");
fclose (fp);
return 1;
}
fclose (fp);
munmap (mmap_data, fs.st_size);
unlink (test_file);
free (test_file);
return 0;
}
#define PREPARE(argc, argv) do_prepare (argc, argv)
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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