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authorUlrich Drepper <drepper@redhat.com>2002-04-03 05:18:32 +0000
committerUlrich Drepper <drepper@redhat.com>2002-04-03 05:18:32 +0000
commit3384a8d67c2e46701356623fdd0a56f3b0734865 (patch)
tree67e6fbd5212fb840120798e8a861ce4f75907074 /libio
parent7a73a7e685a784b8f7014516a3c968ac74d6d3eb (diff)
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Update.
* libio/bug-ungetwc1.c: New file. * libio/Makefile (tests): Add bug-ungetwc1. * libio/fileops.c (_IO_new_file_close_it): Only call _IO_do_flush if stream was last used for writing.
Diffstat (limited to 'libio')
-rw-r--r--libio/Makefile3
-rw-r--r--libio/bug-ungetwc1.c74
-rw-r--r--libio/fileops.c6
3 files changed, 81 insertions, 2 deletions
diff --git a/libio/Makefile b/libio/Makefile
index af91ef2a02..fb42da2c15 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -48,7 +48,8 @@ routines := \
tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-fopenloc \
- tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf
+ tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf \
+ bug-ungetwc1
test-srcs = test-freopen
all: # Make this the default target; it will be defined in Rules.
diff --git a/libio/bug-ungetwc1.c b/libio/bug-ungetwc1.c
new file mode 100644
index 0000000000..e1623f4efd
--- /dev/null
+++ b/libio/bug-ungetwc1.c
@@ -0,0 +1,74 @@
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <wchar.h>
+
+const char write_chars[] = "ABC"; /* Characters on testfile. */
+const wint_t unget_wchar = L'A'; /* Ungotten wide character. */
+
+char *fname;
+
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+
+static int
+do_test (void)
+{
+ wint_t wc;
+ FILE *fp;
+ int fd;
+
+ fname = (char *) malloc (strlen (test_dir) + sizeof "/bug-ungetwc1.XXXXXX");
+ if (fname == NULL)
+ {
+ puts ("no memory");
+ return 1;
+ }
+ strcpy (stpcpy (fname, test_dir), "/bug-ungetwc1.XXXXXX");
+ fd = mkstemp (fname);
+ if (fd == -1)
+ {
+ printf ("cannot open temporary file: %m\n");
+ return 1;
+ }
+
+ setlocale(LC_ALL, "");
+
+ /* Output to the file. */
+ if ((fp = fdopen (fd, "w")) == NULL)
+ {
+ fprintf (stderr, "Cannot make `%s' file\n", fname);
+ exit (EXIT_FAILURE);
+ }
+ add_temp_file (fname);
+
+ fprintf (fp, "%s", write_chars);
+ fclose (fp);
+
+ /* Read from the file. */
+ fp = fopen (fname, "r");
+
+ while (!feof (fp))
+ wc = getwc (fp);
+ printf ("\nThe end-of-file indicator is set.\n");
+
+ /* Unget a wide character. */
+ ungetwc (unget_wchar, fp);
+ printf ("< `%lc' is ungotten.\n", unget_wchar);
+
+ /* Check the end-of-file indicator. */
+ if (feof (fp))
+ printf ("The end-of-file indicator is still set.\n");
+ else
+ printf ("The end-of-file flag is cleared.\n");
+
+ fflush (stdout);
+ fclose (fp);
+
+ return 0;
+}
diff --git a/libio/fileops.c b/libio/fileops.c
index 7144a87289..7f833e5094 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -161,7 +161,11 @@ _IO_new_file_close_it (fp)
if (!_IO_file_is_open (fp))
return EOF;
- write_status = _IO_do_flush (fp);
+ if ((fp->_flags & _IO_NO_WRITES) == 0
+ && (fp->_flags & _IO_CURRENTLY_PUTTING) != 0)
+ write_status = _IO_do_flush (fp);
+ else
+ write_status = 0;
INTUSE(_IO_unsave_markers) (fp);