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/* Test getline.
Copyright (C) 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 <malloc.h>
#include <mcheck.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/test-driver.h>
#include <support/support.h>
#include <support/xstdio.h>
#include <support/xunistd.h>
static struct test_data
{
/* Input test data for fopencookie stream. */
const char *in_data;
/* The amount of test data left. */
size_t in_data_left;
/* Error number for forcing an error on next read. */
int in_error;
/* Error number for forcing an error (rather than EOF) after all
bytes read. */
int in_error_after;
} the_cookie;
/* Produce a stream of test data based on data in COOKIE, storing up
to SIZE bytes in BUF. */
static ssize_t
io_read (void *cookie, char *buf, size_t size)
{
struct test_data *p = cookie;
if (p->in_error)
{
errno = p->in_error;
return -1;
}
if (size > p->in_data_left)
size = p->in_data_left;
memcpy (buf, p->in_data, size);
p->in_data += size;
p->in_data_left -= size;
if (p->in_data_left == 0)
p->in_error = p->in_error_after;
return size;
}
/* Set up a test stream with fopencookie. */
static FILE *
open_test_stream (const char *in_data, size_t size)
{
static cookie_io_functions_t io_funcs = { .read = io_read };
the_cookie.in_data = in_data;
the_cookie.in_data_left = size;
the_cookie.in_error = 0;
the_cookie.in_error_after = 0;
FILE *fp = fopencookie (&the_cookie, "r", io_funcs);
TEST_VERIFY_EXIT (fp != NULL);
return fp;
}
/* Set up a test stream with fopencookie, using data from a string
literal. */
#define OPEN_TEST_STREAM(IN_DATA) open_test_stream (IN_DATA, sizeof (IN_DATA))
/* Wrap getline to verify that (as per the glibc manual), *LINEPTR is
returned as non-null and with at least *N bytes (even on error or
EOF). Also clear errno for the benefit of tests that check the
value of errno after the call. */
ssize_t
wrap_getline (char **lineptr, size_t *n, FILE *stream)
{
errno = 0;
ssize_t ret = getline (lineptr, n, stream);
if (lineptr != NULL && n != NULL)
{
TEST_VERIFY (*lineptr != NULL);
TEST_VERIFY (malloc_usable_size (*lineptr) >= *n);
}
return ret;
}
int
do_test (void)
{
FILE *fp;
char *lineptr = NULL;
size_t size = 0;
ssize_t ret;
mtrace ();
/* Test failure with EINVAL (and error indicator for stream set) if
lineptr is a null pointer. */
verbose_printf ("Testing lineptr == NULL\n");
fp = OPEN_TEST_STREAM ("test");
ret = wrap_getline (NULL, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test failure with EINVAL (and error indicator for stream set) if
n is a null pointer. */
verbose_printf ("Testing n == NULL\n");
fp = OPEN_TEST_STREAM ("test");
ret = wrap_getline (&lineptr, NULL, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test failure with EINVAL (and error indicator for stream set) if
both lineptr and n are null pointers. */
verbose_printf ("Testing lineptr == NULL and n == NULL\n");
fp = OPEN_TEST_STREAM ("test");
ret = wrap_getline (NULL, NULL, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test normal line, fitting in available space (including case with
null bytes). */
verbose_printf ("Testing normal nonempty input\n");
lineptr = xmalloc (10);
size = 10;
fp = OPEN_TEST_STREAM ("foo\nbar\0\n\0baz\nte\0st\n");
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "foo\n", 5);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "bar\0\n", 6);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "\0baz\n", 6);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 6);
TEST_COMPARE_BLOB (lineptr, 7, "te\0st\n", 7);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 1);
TEST_COMPARE_BLOB (lineptr, 1, "", 1);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
fclose (fp);
/* Test normal line, with reallocation (including case with null bytes). */
verbose_printf ("Testing normal nonempty input with reallocation\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = OPEN_TEST_STREAM ("foo\nbar\0\n\0baz\nte\0st\n"
"foo\nbar\0\n\0baz\nte\0st\n");
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "foo\n", 5);
free (lineptr);
lineptr = NULL;
size = 0;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "bar\0\n", 6);
free (lineptr);
lineptr = NULL;
size = 0;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "\0baz\n", 6);
free (lineptr);
lineptr = NULL;
size = 0;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 6);
TEST_COMPARE_BLOB (lineptr, 7, "te\0st\n", 7);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "foo\n", 5);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "bar\0\n", 6);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "\0baz\n", 6);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 6);
TEST_COMPARE_BLOB (lineptr, 7, "te\0st\n", 7);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 1);
TEST_COMPARE_BLOB (lineptr, 1, "", 1);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
fclose (fp);
/* Test EOF before delimiter but after some bytes read, fitting in
available space (including case with null bytes). */
verbose_printf ("Testing EOF before delimiter\n");
free (lineptr);
lineptr = xmalloc (10);
size = 10;
fp = open_test_stream ("foo", 3);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 3);
TEST_COMPARE_BLOB (lineptr, 4, "foo", 4);
fclose (fp);
free (lineptr);
lineptr = xmalloc (10);
size = 10;
fp = open_test_stream ("bar\0", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "bar\0", 5);
fclose (fp);
free (lineptr);
lineptr = xmalloc (10);
size = 10;
fp = open_test_stream ("\0baz", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "\0baz", 5);
fclose (fp);
free (lineptr);
lineptr = xmalloc (10);
size = 10;
fp = open_test_stream ("te\0st", 5);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "te\0st", 6);
fclose (fp);
/* Test EOF before delimiter but after some bytes read, with
reallocation (including case with null bytes). */
verbose_printf ("Testing EOF before delimiter with reallocation\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("foo", 3);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 3);
TEST_COMPARE_BLOB (lineptr, 4, "foo", 4);
fclose (fp);
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("bar\0", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "bar\0", 5);
fclose (fp);
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("\0baz", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "\0baz", 5);
fclose (fp);
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("te\0st", 5);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "te\0st", 6);
fclose (fp);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
fp = open_test_stream ("foo", 3);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 3);
TEST_COMPARE_BLOB (lineptr, 4, "foo", 4);
fclose (fp);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
fp = open_test_stream ("bar\0", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "bar\0", 5);
fclose (fp);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
fp = open_test_stream ("\0baz", 4);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 4);
TEST_COMPARE_BLOB (lineptr, 5, "\0baz", 5);
fclose (fp);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
fp = open_test_stream ("te\0st", 5);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 5);
TEST_COMPARE_BLOB (lineptr, 6, "te\0st", 6);
fclose (fp);
/* Test EOF with no bytes read (nothing is specified about anything
written to the buffer), including EOF again when already at end
of file. */
verbose_printf ("Testing EOF with no bytes read\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("", 0);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
fclose (fp);
free (lineptr);
lineptr = xmalloc (1);
size = 1;
fp = open_test_stream ("", 0);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (ferror (fp), 0);
TEST_COMPARE (!!feof (fp), 1);
fclose (fp);
/* Test error occurring with no bytes read, including calling
wrap_getline again while the file is in error state. */
verbose_printf ("Testing error with no bytes read\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("", 0);
the_cookie.in_error = EINVAL;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
/* Make sure error state is sticky. */
the_cookie.in_error = 0;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test error occurring after some bytes read. Specifications are
ambiguous here; at least in the fopencookie case used for
testing, glibc returns the partial line (but with the error
indicator on the stream set). */
verbose_printf ("Testing error after some bytes read\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = open_test_stream ("foo", 3);
the_cookie.in_error_after = EINVAL;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, 3);
TEST_COMPARE_BLOB (lineptr, 4, "foo", 4);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
/* Make sure error state is sticky. */
the_cookie.in_error = 0;
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test EBADF error as a representative example of an fgetc error
resulting in an error from wrap_getline. We don't try to cover all
error cases for fgetc here. */
verbose_printf ("Testing EBADF error\n");
free (lineptr);
lineptr = NULL;
size = 0;
fp = xfopen ("/dev/null", "r");
xclose (fileno (fp));
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EBADF);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
/* Test EAGAIN error as an example of an fgetc error on a valid file
descriptor. */
verbose_printf ("Testing EAGAIN error\n");
free (lineptr);
lineptr = NULL;
size = 0;
int pipefd[2];
xpipe (pipefd);
ret = fcntl (pipefd[0], F_SETFL, O_NONBLOCK);
TEST_VERIFY_EXIT (ret == 0);
fp = fdopen (pipefd[0], "r");
TEST_VERIFY_EXIT (fp != NULL);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EAGAIN);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
/* Make sure error state is sticky (even after more data is
available to read). */
xwrite (pipefd[1], "x\n", 2);
ret = wrap_getline (&lineptr, &size, fp);
TEST_COMPARE (ret, -1);
TEST_COMPARE (!!ferror (fp), 1);
TEST_COMPARE (feof (fp), 0);
fclose (fp);
free (lineptr);
return 0;
}
#include <support/test-driver.c>
|
