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glibc/stdio-common/tst-unlockedio.c
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/* Test for some *_unlocked stdio interfaces. | |
Copyright (C) 2004-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
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 <stdlib.h> | |
#include <stdio.h> | |
#include <string.h> | |
#include <libc-internal.h> | |
int fd; | |
static void do_prepare (void); | |
static int do_test (void); | |
#define PREPARE(argc, argv) do_prepare () | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" | |
static int | |
do_test (void) | |
{ | |
const char blah[] = "BLAH"; | |
char buf[strlen (blah) + 1]; | |
FILE *fp, *f; | |
const char *cp; | |
char *wp; | |
if ((fp = fdopen (fd, "w+")) == NULL) | |
exit (1); | |
flockfile (fp); | |
f = fp; | |
cp = blah; | |
/* These tests deliberately use fwrite_unlocked with the size | |
argument specified as 0, which results in "division by zero" | |
warnings from the expansion of that macro (in code that is not | |
evaluated for a size of 0). This applies to the tests of | |
fread_unlocked below as well. */ | |
DIAG_PUSH_NEEDS_COMMENT; | |
DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdiv-by-zero"); | |
if (ftello (fp) != 0 | |
|| fwrite_unlocked (blah, blah - blah, strlen (blah), f++) != 0 | |
|| f != fp + 1 | |
|| fwrite_unlocked ("", 5.0, 0, --f) != 0 | |
|| f != fp | |
|| fwrite_unlocked (cp++, 16, 0.25, fp) != 0 | |
|| cp != blah + 1 | |
|| fwrite_unlocked (--cp, 0.25, 16, fp) != 0 | |
|| cp != blah | |
|| fwrite_unlocked (blah, 0, -0.0, fp) != 0 | |
|| ftello (fp) != 0) | |
{ | |
puts ("One of fwrite_unlocked tests failed"); | |
exit (1); | |
} | |
DIAG_POP_NEEDS_COMMENT; | |
if (fwrite_unlocked (blah, 1, strlen (blah) - 2, fp) != strlen (blah) - 2) | |
{ | |
puts ("Could not write string into file"); | |
exit (1); | |
} | |
if (putc_unlocked ('A' + 0x1000000, fp) != 'A') | |
{ | |
puts ("putc_unlocked failed"); | |
exit (1); | |
} | |
f = fp; | |
cp = blah + strlen (blah) - 1; | |
if (putc_unlocked (*cp++, f++) != 'H' | |
|| f != fp + 1 | |
|| cp != strchr (blah, '\0')) | |
{ | |
puts ("fputc_unlocked failed"); | |
exit (1); | |
} | |
if (ftello (fp) != (off_t) strlen (blah)) | |
{ | |
printf ("Failed to write %zd bytes to temporary file", strlen (blah)); | |
exit (1); | |
} | |
rewind (fp); | |
f = fp; | |
wp = buf; | |
memset (buf, ' ', sizeof (buf)); | |
/* See explanation above. */ | |
DIAG_PUSH_NEEDS_COMMENT; | |
DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdiv-by-zero"); | |
if (ftello (fp) != 0 | |
|| fread_unlocked (buf, buf - buf, strlen (blah), f++) != 0 | |
|| f != fp + 1 | |
|| fread_unlocked (buf, 5.0, 0, --f) != 0 | |
|| f != fp | |
|| fread_unlocked (wp++, 16, 0.25, fp) != 0 | |
|| wp != buf + 1 | |
|| fread_unlocked (--wp, 0.25, 16, fp) != 0 | |
|| wp != buf | |
|| fread_unlocked (buf, 0, -0.0, fp) != 0 | |
|| ftello (fp) != 0 | |
|| memcmp (buf, " ", sizeof (buf)) != 0) | |
{ | |
puts ("One of fread_unlocked tests failed"); | |
exit (1); | |
} | |
DIAG_POP_NEEDS_COMMENT; | |
if (fread_unlocked (buf, 1, strlen (blah) - 2, fp) != strlen (blah) - 2) | |
{ | |
puts ("Could not read string from file"); | |
exit (1); | |
} | |
if (getc_unlocked (fp) != 'A') | |
{ | |
puts ("getc_unlocked failed"); | |
exit (1); | |
} | |
f = fp; | |
if (fgetc_unlocked (f++) != 'H' | |
|| f != fp + 1 | |
|| fgetc_unlocked (--f) != EOF | |
|| f != fp) | |
{ | |
puts ("fgetc_unlocked failed"); | |
exit (1); | |
} | |
if (ftello (fp) != (off_t) strlen (blah)) | |
{ | |
printf ("Failed to read %zd bytes from temporary file", strlen (blah)); | |
exit (1); | |
} | |
funlockfile (fp); | |
fclose (fp); | |
return 0; | |
} | |
static void | |
do_prepare (void) | |
{ | |
fd = create_temp_file ("tst-unlockedio.", NULL); | |
if (fd == -1) | |
{ | |
printf ("cannot create temporary file: %m\n"); | |
exit (1); | |
} | |
} |