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-rw-r--r--libio/tst-ftell-active-handler.c384
1 files changed, 384 insertions, 0 deletions
diff --git a/libio/tst-ftell-active-handler.c b/libio/tst-ftell-active-handler.c
new file mode 100644
index 0000000000..175e9042ae
--- /dev/null
+++ b/libio/tst-ftell-active-handler.c
@@ -0,0 +1,384 @@
+/* Verify that ftell returns the correct value at various points before and
+ after the handler on which it is called becomes active.
+ Copyright (C) 2014 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <wchar.h>
+
+static int do_test (void);
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+#define get_handles_fdopen(filename, fd, fp, fd_mode, mode) \
+({ \
+ int ret = 0; \
+ (fd) = open ((filename), (fd_mode), 0); \
+ if ((fd) == -1) \
+ { \
+ printf ("open failed: %m\n"); \
+ ret = 1; \
+ } \
+ else \
+ { \
+ (fp) = fdopen ((fd), (mode)); \
+ if ((fp) == NULL) \
+ { \
+ printf ("fdopen failed: %m\n"); \
+ close (fd); \
+ ret = 1; \
+ } \
+ } \
+ ret; \
+})
+
+#define get_handles_fopen(filename, fd, fp, mode) \
+({ \
+ int ret = 0; \
+ (fp) = fopen ((filename), (mode)); \
+ if ((fp) == NULL) \
+ { \
+ printf ("fopen failed: %m\n"); \
+ ret = 1; \
+ } \
+ else \
+ { \
+ (fd) = fileno (fp); \
+ if ((fd) == -1) \
+ { \
+ printf ("fileno failed: %m\n"); \
+ ret = 1; \
+ } \
+ } \
+ ret; \
+})
+
+/* data points to either char_data or wide_data, depending on whether we're
+ testing regular file mode or wide mode respectively. Similarly,
+ fputs_func points to either fputs or fputws. data_len keeps track of the
+ length of the current data and file_len maintains the current file
+ length. */
+static const void *data;
+static const char *char_data = "abcdef";
+static const wchar_t *wide_data = L"abcdef";
+static size_t data_len;
+static size_t file_len;
+
+typedef int (*fputs_func_t) (const void *data, FILE *fp);
+fputs_func_t fputs_func;
+
+/* Test that the value of ftell is not cached when the stream handle is not
+ active. */
+static int
+do_ftell_test (const char *filename)
+{
+ int ret = 0;
+ struct test
+ {
+ const char *mode;
+ int fd_mode;
+ size_t old_off;
+ size_t new_off;
+ } test_modes[] = {
+ /* In w, w+ and r+ modes, the file position should be at the
+ beginning of the file. After the write, the offset should be
+ updated to data_len. */
+ {"w", O_WRONLY, 0, data_len},
+ {"w+", O_RDWR, 0, data_len},
+ {"r+", O_RDWR, 0, data_len},
+ /* For 'a' and 'a+' modes, the initial file position should be the
+ current end of file. After the write, the offset has data_len
+ added to the old value. */
+ {"a", O_WRONLY, data_len, 2 * data_len},
+ {"a+", O_RDWR, 2 * data_len, 3 * data_len},
+ };
+ for (int j = 0; j < 2; j++)
+ {
+ for (int i = 0; i < sizeof (test_modes) / sizeof (struct test); i++)
+ {
+ FILE *fp;
+ int fd;
+ printf ("\tftell: %s (file, \"%s\"): ", j == 0 ? "fdopen" : "fopen",
+ test_modes[i].mode);
+
+ if (j == 0)
+ ret = get_handles_fdopen (filename, fd, fp, test_modes[i].fd_mode,
+ test_modes[i].mode);
+ else
+ ret = get_handles_fopen (filename, fd, fp, test_modes[i].mode);
+
+ if (ret != 0)
+ return ret;
+
+ long off = ftell (fp);
+ if (off != test_modes[i].old_off)
+ {
+ printf ("Incorrect old offset. Expected %zu but got %ld, ",
+ test_modes[i].old_off, off);
+ ret |= 1;
+ }
+ else
+ printf ("old offset = %ld, ", off);
+
+ /* The effect of this write on the offset should be seen in the ftell
+ call that follows it. */
+ int ret = write (fd, data, data_len);
+ off = ftell (fp);
+
+ if (off != test_modes[i].new_off)
+ {
+ printf ("Incorrect new offset. Expected %zu but got %ld\n",
+ test_modes[i].old_off, off);
+ ret |= 1;
+ }
+ else
+ printf ("new offset = %ld\n", off);
+
+ fclose (fp);
+ }
+ }
+
+ return ret;
+}
+
+/* This test opens the file for writing, moves the file offset of the
+ underlying file, writes out data and then checks if ftell trips on it. */
+static int
+do_write_test (const char *filename)
+{
+ FILE *fp = NULL;
+ int fd;
+ int ret = 0;
+ struct test
+ {
+ const char *mode;
+ int fd_mode;
+ } test_modes[] = {
+ {"w", O_WRONLY},
+ {"w+", O_RDWR},
+ {"r+", O_RDWR}
+ };
+
+ for (int j = 0; j < 2; j++)
+ {
+ for (int i = 0; i < sizeof (test_modes) / sizeof (struct test); i++)
+ {
+ printf ("\twrite: %s (file, \"%s\"): ", j == 0 ? "fopen" : "fdopen",
+ test_modes[i].mode);
+
+ if (j == 0)
+ ret = get_handles_fopen (filename, fd, fp, test_modes[i].mode);
+ else
+ ret = get_handles_fdopen (filename, fd, fp, test_modes[i].fd_mode,
+ test_modes[i].mode);
+
+ if (ret != 0)
+ return ret;
+
+ /* Move offset to just before the end of the file. */
+ off_t ret = lseek (fd, file_len - 1, SEEK_SET);
+ if (ret == -1)
+ {
+ printf ("lseek failed: %m\n");
+ ret |= 1;
+ }
+
+ /* Write some data. */
+ size_t written = fputs_func (data, fp);
+
+ if (written == EOF)
+ {
+ printf ("fputs[1] failed to write data\n");
+ ret |= 1;
+ }
+
+ /* Verify that the offset points to the end of the file. The length
+ of the file would be the original length + the length of data
+ written to it - the amount by which we moved the offset using
+ lseek. */
+ long offset = ftell (fp);
+ file_len = file_len - 1 + data_len;
+
+ if (offset != file_len)
+ {
+ printf ("Incorrect offset. Expected %zu, but got %ld\n",
+ file_len, offset);
+
+ ret |= 1;
+ }
+
+ printf ("offset = %ld\n", offset);
+ fclose (fp);
+ }
+ }
+
+ return ret;
+}
+
+/* This test opens a file in append mode, writes some data, and then verifies
+ that ftell does not trip over it. */
+static int
+do_append_test (const char *filename)
+{
+ FILE *fp = NULL;
+ int ret = 0;
+ int fd;
+
+ struct test
+ {
+ const char *mode;
+ int fd_mode;
+ } test_modes[] = {
+ {"a", O_WRONLY},
+ {"a+", O_RDWR}
+ };
+
+ for (int j = 0; j < 2; j++)
+ {
+ for (int i = 0; i < sizeof (test_modes) / sizeof (struct test); i++)
+ {
+ printf ("\tappend: %s (file, \"%s\"): ", j == 0 ? "fopen" : "fdopen",
+ test_modes[i].mode);
+
+ if (j == 0)
+ ret = get_handles_fopen (filename, fd, fp, test_modes[i].mode);
+ else
+ ret = get_handles_fdopen (filename, fd, fp, test_modes[i].fd_mode,
+ test_modes[i].mode);
+
+ if (ret != 0)
+ return ret;
+
+ /* Write some data. */
+ size_t written = fputs_func (data, fp);
+
+ if (written == EOF)
+ {
+ printf ("fputs[1] failed to write all data\n");
+ ret |= 1;
+ }
+
+ /* Verify that the offset points to the end of the file. The file
+ len is maintained by adding data_len each time to reflect the data
+ written to it. */
+ long offset = ftell (fp);
+ file_len += data_len;
+
+ if (offset != file_len)
+ {
+ printf ("Incorrect offset. Expected %zu, but got %ld\n",
+ file_len, offset);
+
+ ret |= 1;
+ }
+
+ printf ("offset = %ld\n", offset);
+ fclose (fp);
+ }
+ }
+
+ return ret;
+}
+
+static int
+do_one_test (const char *filename)
+{
+ int ret = 0;
+
+ ret |= do_ftell_test (filename);
+ ret |= do_write_test (filename);
+ ret |= do_append_test (filename);
+
+ return ret;
+}
+
+/* Run a set of tests for ftell for regular files and wide mode files. */
+static int
+do_test (void)
+{
+ int ret = 0;
+ FILE *fp = NULL;
+ char *filename;
+ size_t written;
+ int fd = create_temp_file ("tst-active-handler-tmp.", &filename);
+
+ if (fd == -1)
+ {
+ printf ("create_temp_file: %m\n");
+ return 1;
+ }
+
+ fp = fdopen (fd, "w");
+ if (fp == NULL)
+ {
+ printf ("fdopen[0]: %m\n");
+ close (fd);
+ return 1;
+ }
+
+ data = char_data;
+ data_len = strlen (char_data);
+ file_len = strlen (char_data);
+ written = fputs (data, fp);
+
+ if (written == EOF)
+ {
+ printf ("fputs[1] failed to write data\n");
+ ret = 1;
+ }
+
+ fclose (fp);
+ if (ret)
+ return ret;
+
+ /* Tests for regular files. */
+ puts ("Regular mode:");
+ fputs_func = (fputs_func_t) fputs;
+ data = char_data;
+ data_len = strlen (char_data);
+ ret |= do_one_test (filename);
+
+ /* Truncate the file before repeating the tests in wide mode. */
+ fp = fopen (filename, "w");
+ if (fp == NULL)
+ {
+ printf ("fopen failed %m\n");
+ return 1;
+ }
+ fclose (fp);
+
+ /* Tests for wide files. */
+ puts ("Wide mode:");
+ if (setlocale (LC_ALL, "en_US.UTF-8") == NULL)
+ {
+ printf ("Cannot set en_US.UTF-8 locale.\n");
+ return 1;
+ }
+ fputs_func = (fputs_func_t) fputws;
+ data = wide_data;
+ data_len = wcslen (wide_data);
+ ret |= do_one_test (filename);
+
+ return ret;
+}
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