diff mbox series

fileops: Don't process , ccs= as individual mode flags (BZ#18906)

Message ID 20230615125424.3600855-1-josimmon@redhat.com
State New
Headers show
Series fileops: Don't process , ccs= as individual mode flags (BZ#18906) | expand

Commit Message

Joe Simmons-Talbott June 15, 2023, 12:54 p.m. UTC 
In processing the first 7 individual characters of the mode for fopen
if ,ccs= is used those characters will be processed as well.  Stop
processing individual mode flags once a comma is encountered.  This has
the effect of requiring ,ccs= to be the last mode flag in the mode
string.  Add a testcase to check that the ,ccs= mode flag is not
processed as individual mode flags.
---
 libio/fileops.c      |  1 +
 libio/tst-fopenloc.c | 30 +++++++++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 1 deletion(-)

Comments

Joe Simmons-Talbott June 15, 2023, 5:14 p.m. UTC | #1 
On Thu, Jun 15, 2023 at 08:54:24AM -0400, Joe Simmons-Talbott wrote:
> In processing the first 7 individual characters of the mode for fopen
> if ,ccs= is used those characters will be processed as well.  Stop
> processing individual mode flags once a comma is encountered.  This has
> the effect of requiring ,ccs= to be the last mode flag in the mode
> string.  Add a testcase to check that the ,ccs= mode flag is not
> processed as individual mode flags.

There was a memory leak in the testcase in this version.  Fixed in v2.

Thanks,
Joe
diff mbox series

Patch

diff --git a/libio/fileops.c b/libio/fileops.c
index 58c9e985e4..1c1113e339 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -247,6 +247,7 @@  _IO_new_file_fopen (FILE *fp, const char *filename, const char *mode,
       switch (*++mode)
 	{
 	case '\0':
+	case ',':
 	  break;
 	case '+':
 	  omode = O_RDWR;
diff --git a/libio/tst-fopenloc.c b/libio/tst-fopenloc.c
index 089c61bf41..540853d662 100644
--- a/libio/tst-fopenloc.c
+++ b/libio/tst-fopenloc.c
@@ -17,6 +17,7 @@ 
    <https://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
+#include <fcntl.h>
 #include <locale.h>
 #include <mcheck.h>
 #include <stdio.h>
@@ -24,6 +25,7 @@ 
 #include <string.h>
 #include <wchar.h>
 #include <sys/resource.h>
+#include <support/check.h>
 #include <support/support.h>
 #include <support/xstdio.h>
 
@@ -55,6 +57,29 @@  do_bz17916 (void)
   return 0;
 }
 
+static int
+do_bz18906 (void)
+{
+  /* BZ #18906 -- check processing of ,ccs= as flags case.  */
+
+  const char *ccs = "r,ccs=+ISO-8859-1";
+  size_t retval;
+
+  FILE *fp = fopen (inputfile, ccs);
+  int flags;
+
+  TEST_VERIFY(fp != NULL);
+
+  if (fp != NULL)
+    {
+      flags = fcntl(fileno(fp), F_GETFL);
+      retval = (flags & O_RDWR) | (flags & O_WRONLY);
+      TEST_COMPARE(retval, false);
+    }
+
+  return EXIT_SUCCESS;
+}
+
 static int
 do_test (void)
 {
@@ -78,7 +103,10 @@  do_test (void)
 
   xfclose (fp);
 
-  return do_bz17916 ();
+  TEST_COMPARE(do_bz17916 (), 0);
+  TEST_COMPARE(do_bz18906 (), 0);
+
+  return EXIT_SUCCESS;
 }
 
 #include <support/test-driver.c>