* [testcase] Another ungetc related bug
@ 2004-12-02 13:22 Jakub Jelinek
2004-12-06 22:41 ` Ulrich Drepper
0 siblings, 1 reply; 2+ messages in thread
From: Jakub Jelinek @ 2004-12-02 13:22 UTC (permalink / raw)
To: Ulrich Drepper, Roland McGrath; +Cc: Glibc hackers
Hi!
This testcase fails 0 1 3 4 tests with current CVS; before my ~ month
old fixes failed just 1 3 4 tests.
So far I just saw that the cause is probably because read_base
is not restored through _IO_switch_to_main_get_area
to its value before pushbackc.
2004-12-02 Jakub Jelinek <jakub@redhat.com>
* libio/Makefile (tests): Add bug-ungetc4.
* libio/bug-ungetc4.c: New test.
--- libc/libio/Makefile.jj 2004-11-09 12:26:42.000000000 +0100
+++ libc/libio/Makefile 2004-12-02 14:16:13.695118870 +0100
@@ -54,7 +54,7 @@ tests = tst_swprintf tst_wprintf tst_sws
tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \
tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \
tst-mmap2-eofsync tst-mmap-offend bug-fopena+ bug-wfflush \
- bug-ungetc2 bug-ftell bug-ungetc3
+ bug-ungetc2 bug-ftell bug-ungetc3 bug-ungetc4
test-srcs = test-freopen
all: # Make this the default target; it will be defined in Rules.
--- libc/libio/bug-ungetc4.c.jj 2004-12-02 14:01:35.430096555 +0100
+++ libc/libio/bug-ungetc4.c 2004-12-02 14:14:05.447038236 +0100
@@ -0,0 +1,116 @@
+/* Test program for ungetc/fseekpos interaction.
+ Copyright (C) 2004 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <stdio.h>
+
+static void do_prepare (void);
+#define PREPARE(argc, argv) do_prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+static const char pattern[] = "abcdefghijklmnopqrstuvwxyz";
+static char *temp_file;
+
+static void
+do_prepare (void)
+{
+ int fd = create_temp_file ("bug-ungetc.", &temp_file);
+ if (fd == -1)
+ {
+ printf ("cannot create temporary file: %m\n");
+ exit (1);
+ }
+ write (fd, pattern, sizeof (pattern));
+ close (fd);
+}
+
+#define TEST_POS 5
+
+static int
+do_one_test (int mode)
+{
+ FILE *f = fopen (temp_file, "r");
+ if (f == NULL)
+ {
+ printf ("%d: could not open temporary file: %m\n", mode);
+ return 1;
+ }
+
+ int i;
+ for (i = 0; i < TEST_POS; ++i)
+ getc (f);
+
+ fpos_t p;
+ if (fgetpos (f, &p) != 0)
+ {
+ printf ("%d: fgetpos failed: %m\n", mode);
+ return 1;
+ }
+
+ if (mode)
+ {
+ if (fseek (f, 0, SEEK_SET) != 0)
+ {
+ printf ("%d: fseek failed: %m\n", mode);
+ return 1;
+ }
+
+ for (i = 0; i < TEST_POS - (mode >= 2); ++i)
+ getc (f);
+ }
+
+ if (mode != 2 && ungetc ('X', f) != 'X')
+ {
+ printf ("%d: ungetc failed\n", mode);
+ return 1;
+ }
+
+ if (mode == 3 && getc (f) != 'X')
+ {
+ printf ("%d: getc after ungetc did not return X\n", mode);
+ return 1;
+ }
+
+ if (fsetpos (f, &p) != 0)
+ {
+ printf ("%d: fsetpos failed: %m\n", mode);
+ return 1;
+ }
+
+ if (getc (f) != pattern[TEST_POS])
+ {
+ printf ("%d: getc did not return %c\n", mode, pattern[TEST_POS]);
+ return 1;
+ }
+
+ fclose (f);
+
+ return 0;
+}
+
+static int
+do_test (void)
+{
+ int mode, ret = 0;
+ for (mode = 0; mode <= 4; mode++)
+ ret |= do_one_test (mode);
+ return ret;
+}
Jakub
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [testcase] Another ungetc related bug
2004-12-02 13:22 [testcase] Another ungetc related bug Jakub Jelinek
@ 2004-12-06 22:41 ` Ulrich Drepper
0 siblings, 0 replies; 2+ messages in thread
From: Ulrich Drepper @ 2004-12-06 22:41 UTC (permalink / raw)
To: Jakub Jelinek; +Cc: Glibc hackers
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Applied, and t he bug is fixed.
- --
⧠Ulrich Drepper ⧠Red Hat, Inc. ⧠444 Castro St ⧠Mountain View, CA â
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=HhRV
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