82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/* Test setvbuf on readonly fopen (using mmap stdio).
|
|
Copyright (C) 2002-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
int main (void)
|
|
{
|
|
char name[] = "/tmp/tst-mmap-setvbuf.XXXXXX";
|
|
char buf[4096];
|
|
const char * const test = "Let's see if mmap stdio works with setvbuf.\n";
|
|
char temp[strlen (test) + 1];
|
|
int fd = mkstemp (name);
|
|
FILE *f;
|
|
|
|
if (fd == -1)
|
|
{
|
|
printf ("%u: cannot open temporary file: %m\n", __LINE__);
|
|
exit (1);
|
|
}
|
|
|
|
f = fdopen (fd, "w");
|
|
if (f == NULL)
|
|
{
|
|
printf ("%u: cannot fdopen temporary file: %m\n", __LINE__);
|
|
exit (1);
|
|
}
|
|
|
|
fputs (test, f);
|
|
fclose (f);
|
|
|
|
f = fopen (name, "rm");
|
|
if (f == NULL)
|
|
{
|
|
printf ("%u: cannot fopen temporary file: %m\n", __LINE__);
|
|
exit (1);
|
|
}
|
|
|
|
if (setvbuf (f, buf, _IOFBF, sizeof buf))
|
|
{
|
|
printf ("%u: setvbuf failed: %m\n", __LINE__);
|
|
exit (1);
|
|
}
|
|
|
|
if (fread (temp, 1, strlen (test), f) != strlen (test))
|
|
{
|
|
printf ("%u: couldn't read the file back: %m\n", __LINE__);
|
|
exit (1);
|
|
}
|
|
temp [strlen (test)] = '\0';
|
|
|
|
if (strcmp (test, temp))
|
|
{
|
|
printf ("%u: read different string than was written:\n%s%s",
|
|
__LINE__, test, temp);
|
|
exit (1);
|
|
}
|
|
|
|
fclose (f);
|
|
|
|
unlink (name);
|
|
exit (0);
|
|
}
|