powerpc: refactor strchr, strchrnul, and strrchr IFUNC.
[glibc.git] / libio / tst-mmap-setvbuf.c
blob56844bc3dfd8621ba9560c9d9a2f552bfc965c41
1 /* Test setvbuf on readonly fopen (using mmap stdio).
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
25 int main (void)
27 char name[] = "/tmp/tst-mmap-setvbuf.XXXXXX";
28 char buf[4096];
29 const char * const test = "Let's see if mmap stdio works with setvbuf.\n";
30 char temp[strlen (test) + 1];
31 int fd = mkstemp (name);
32 FILE *f;
34 if (fd == -1)
36 printf ("%u: cannot open temporary file: %m\n", __LINE__);
37 exit (1);
40 f = fdopen (fd, "w");
41 if (f == NULL)
43 printf ("%u: cannot fdopen temporary file: %m\n", __LINE__);
44 exit (1);
47 fputs (test, f);
48 fclose (f);
50 f = fopen (name, "rm");
51 if (f == NULL)
53 printf ("%u: cannot fopen temporary file: %m\n", __LINE__);
54 exit (1);
57 if (setvbuf (f, buf, _IOFBF, sizeof buf))
59 printf ("%u: setvbuf failed: %m\n", __LINE__);
60 exit (1);
63 if (fread (temp, 1, strlen (test), f) != strlen (test))
65 printf ("%u: couldn't read the file back: %m\n", __LINE__);
66 exit (1);
68 temp [strlen (test)] = '\0';
70 if (strcmp (test, temp))
72 printf ("%u: read different string than was written:\n%s%s",
73 __LINE__, test, temp);
74 exit (1);
77 fclose (f);
79 unlink (name);
80 exit (0);