libio: Remove __libc_readline_unlocked

__nss_readline supersedes it.  This reverts part of commit
3f5e3f5d066dcffb80af48ae2cf35a01a85a8f10 ("libio: Implement
internal function __libc_readline_unlocked").  The internal
aliases __fseeko64 and __ftello64 are preserved because
they are needed by __nss_readline as well.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 0 insertions, 237 deletions

diff --git a/libio/tst-readline.c b/libio/tst-readline.c
deleted file mode 100644
index 40663ed77f..0000000000
--- a/libio/tst-readline.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/* Test the __libc_readline_unlocked function.
-   Copyright (C) 2018-2020 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/>.  */
-
-/* Exercise __libc_readline_unlocked with various combinations of line
-   lengths, stdio buffer sizes, and line read buffer sizes.  */
-
-#include <errno.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <string.h>
-#include <support/check.h>
-#include <support/support.h>
-#include <support/temp_file.h>
-#include <support/test-driver.h>
-#include <support/xmemstream.h>
-#include <support/xstdio.h>
-#include <support/xunistd.h>
-
-enum
-  {
-    maximum_line_length = 7,
-    number_of_lines = 3,
-  };
-
-/* -1: Do not set buffer size.  0: unbuffered.  Otherwise, use this as
-   the size of the buffer.  */
-static int buffer_size;
-
-/* These size of the buffer used for reading.  Must be at least 2.  */
-static int read_size;
-
-/* If a read files with ERANGE, increase the buffer size by this
-   amount.  Must be positive.  */
-static int read_size_increment;
-
-/* If non-zero, do not reset the read size after an ERANGE error.  */
-static int read_size_preserve;
-
-/* If non-zero, no '\n' at the end of the file.  */
-static int no_newline_at_eof;
-
-/* Length of the line, or -1 if the line is not present.  */
-static int line_lengths[number_of_lines];
-
-/* The name of the test file.  */
-static char *test_file_path;
-
-/* The contents of the test file.  */
-static char expected_contents[(maximum_line_length + 2) * number_of_lines + 1];
-static size_t expected_length;
-
-/* Returns a random byte which is not zero or the line terminator.  */
-static char
-random_char (void)
-{
-  static unsigned int rand_state = 1;
-  while (true)
-    {
-      char result = rand_r (&rand_state) >> 16;
-      if (result != 0 && result != '\n')
-        return result;
-    }
-}
-
-/* Create the test file.  */
-static void
-prepare (int argc, char **argv)
-{
-  int fd = create_temp_file ("tst-readline-", &test_file_path);
-  TEST_VERIFY_EXIT (fd >= 0);
-  xclose (fd);
-}
-
-/* Prepare the test file.  Return false if the test parameters are
-   incongruent and the test should be skipped.  */
-static bool
-write_test_file (void)
-{
-  expected_length = 0;
-  char *p = expected_contents;
-  for (int lineno = 0; lineno < number_of_lines; ++lineno)
-    for (int i = 0; i < line_lengths[lineno]; ++i)
-      *p++ = random_char ();
-  expected_length = p - &expected_contents[0];
-  if (no_newline_at_eof)
-    {
-      if (expected_length == 0)
-        return false;
-      --expected_length;
-      --p;
-    }
-  if (test_verbose > 0)
-    {
-      printf ("info: writing test file of %zu bytes:\n", expected_length);
-      for (int i = 0; i < number_of_lines; ++i)
-        printf (" line %d: %d\n", i, line_lengths[i]);
-      if (no_newline_at_eof)
-        puts ("  (no newline at EOF)");
-    }
-  TEST_VERIFY_EXIT (expected_length < sizeof (expected_contents));
-  *p++ = '\0';
-  support_write_file_string (test_file_path, expected_contents);
-  return true;
-}
-
-/* Run a single test (a combination of a test file and read
-   parameters).  */
-static void
-run_test (void)
-{
-  TEST_VERIFY_EXIT (read_size_increment > 0);
-  if (test_verbose > 0)
-    {
-      printf ("info: running test: buffer_size=%d read_size=%d\n"
-              "  read_size_increment=%d read_size_preserve=%d\n",
-              buffer_size, read_size, read_size_increment, read_size_preserve);
-    }
-
-  struct xmemstream result;
-  xopen_memstream (&result);
-
-  FILE *fp = xfopen (test_file_path, "rce");
-  char *fp_buffer = NULL;
-  if (buffer_size == 0)
-    TEST_VERIFY_EXIT (setvbuf (fp, NULL, _IONBF, 0) == 0);
-  if (buffer_size > 0)
-    {
-      fp_buffer = xmalloc (buffer_size);
-      TEST_VERIFY_EXIT (setvbuf (fp, fp_buffer, _IOFBF, buffer_size) == 0);
-    }
-
-  char *line_buffer = xmalloc (read_size);
-  size_t line_buffer_size = read_size;
-
-  while (true)
-    {
-      ssize_t ret = __libc_readline_unlocked
-        (fp, line_buffer, line_buffer_size);
-      if (ret < 0)
-        {
-          TEST_VERIFY (ret == -1);
-          if (errno != ERANGE)
-            FAIL_EXIT1 ("__libc_readline_unlocked: %m");
-          line_buffer_size += read_size_increment;
-          free (line_buffer);
-          line_buffer = xmalloc (line_buffer_size);
-          /* Try reading this line again.  */
-        }
-      else if (ret == 0)
-        break;
-      else
-        {
-          /* A line has been read.  Save it.  */
-          TEST_VERIFY (ret == strlen (line_buffer));
-          const char *pnl = strchr (line_buffer, '\n');
-          /* If there is a \n, it must be at the end.  */
-          TEST_VERIFY (pnl == NULL || pnl == line_buffer + ret - 1);
-          fputs (line_buffer, result.out);
-
-          /* Restore the original read size if required.  */
-          if (line_buffer_size > read_size && !read_size_preserve)
-            {
-              line_buffer_size = read_size;
-              free (line_buffer);
-              line_buffer = xmalloc (line_buffer_size);
-            }
-        }
-    }
-
-  xfclose (fp);
-  free (fp_buffer);
-  free (line_buffer);
-
-  xfclose_memstream (&result);
-  TEST_VERIFY (result.length == expected_length);
-  TEST_VERIFY (strcmp (result.buffer, expected_contents) == 0);
-  if (test_verbose > 0)
-    {
-      printf ("info: expected (%zu): [[%s]]\n",
-              expected_length, expected_contents);
-      printf ("info:   actual (%zu): [[%s]]\n", result.length, result.buffer);
-    }
-  free (result.buffer);
-}
-
-/* Test one test file with multiple read parameters.  */
-static void
-test_one_file (void)
-{
-  for (buffer_size = -1; buffer_size <= maximum_line_length + 1; ++buffer_size)
-    for (read_size = 2; read_size <= maximum_line_length + 2; ++read_size)
-      for (read_size_increment = 1; read_size_increment <= 4;
-           ++read_size_increment)
-        for (read_size_preserve = 0; read_size_preserve < 2;
-             ++read_size_preserve)
-          run_test ();
-}
-
-
-static int
-do_test (void)
-{
-  /* Set up the test file contents.  */
-  for (line_lengths[0] = -1; line_lengths[0] <= maximum_line_length;
-       ++line_lengths[0])
-    for (line_lengths[1] = -1; line_lengths[1] <= maximum_line_length;
-         ++line_lengths[1])
-      for (line_lengths[2] = -1; line_lengths[2] <= maximum_line_length;
-           ++line_lengths[2])
-        for (no_newline_at_eof = 0; no_newline_at_eof < 2; ++no_newline_at_eof)
-          {
-            if (!write_test_file ())
-              continue;
-            test_one_file ();
-          }
-  free (test_file_path);
-  return 0;
-}
-
-#define TIMEOUT 100
-#define PREPARE prepare
-#include <support/test-driver.c>