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libio: Fix fmemopen 'w' mode with provided buffer

Message ID 55A7AB9E.2050308@linaro.org
State New
Headers show

Commit Message

Adhemerval Zanella Netto July 16, 2015, 1:03 p.m. UTC 
On 16-07-2015 08:58, Stefan Liebler wrote:
> As already mentioned in https://www.sourceware.org/ml/libc-alpha/2015-07/msg00455.html, the testcase is now passing on s390-32.
> 
> Can you change this printf in case of a failure, too:

Ok, change below:

	* libio/fmemopen.c (__fmemopen): Fix 'w' openmode with provided
	buffer.
	* stdio-common/tst-fmemopen2.c (do_test_with_buffer): Fix typo and
	fail output information.

--
diff mbox

Patch

diff --git a/libio/fmemopen.c b/libio/fmemopen.c
index e6e6a49..3ab3e8d 100644
--- a/libio/fmemopen.c
+++ b/libio/fmemopen.c
@@ -150,7 +150,7 @@  __fmemopen (void *buf, size_t len, const char *mode)
   cookie_io_functions_t iof;
   fmemopen_cookie_t *c;
 
-  c = (fmemopen_cookie_t *) malloc (sizeof (fmemopen_cookie_t));
+  c = (fmemopen_cookie_t *) calloc (sizeof (fmemopen_cookie_t), 1);
   if (c == NULL)
     return NULL;
 
@@ -165,7 +165,6 @@  __fmemopen (void *buf, size_t len, const char *mode)
 	  return NULL;
 	}
       c->buffer[0] = '\0';
-      c->maxpos = 0;
     }
   else
     {
@@ -182,7 +181,8 @@  __fmemopen (void *buf, size_t len, const char *mode)
       if (mode[0] == 'w' && mode[1] == '+')
 	c->buffer[0] = '\0';
 
-      c->maxpos = strnlen (c->buffer, len);
+      if (mode[0] == 'a')
+        c->maxpos = strnlen (c->buffer, len);
     }
 
 
diff --git a/stdio-common/tst-fmemopen2.c b/stdio-common/tst-fmemopen2.c
index 16dd3ad..a2c05c1 100644
--- a/stdio-common/tst-fmemopen2.c
+++ b/stdio-common/tst-fmemopen2.c
@@ -34,7 +34,7 @@  do_test_with_buffer (void)
   FILE *fp = fmemopen (buf, nbuf, "w");
   if (fp == NULL)
     {
-      printf ("FAIL: fmemopen failedi (%s)\n", __FUNCTION__);
+      printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__);
       return 1;
     }
 
@@ -69,7 +69,7 @@  do_test_with_buffer (void)
   if (o != nstr)
     {
       printf ("FAIL: third ftello returned %jd, expected %zu\n",
-	      (intmax_t)o, nbuf);
+	      (intmax_t)o, nstr);
       result = 1;
     }