Fix GCC 8 compiler warnings on strncpy's truncated copy on debian distro
For some reason, GCC 8 in debian is pickier than GCC 8 in ubuntu. It complains
about things in strncpy like this
/home/sluong/vpp/src/vlib/linux/pci.c:485:7: error: ‘strncpy’ output may be
truncated copying 15 bytes from a string of length 255 [-Werror=stringop-truncation]
strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/sluong/vpp/src/vlib/linux/pci.c: At top level:
It also complains similar things in string_test.c
The fix in pci.c is to convert strncpy to use clib_strncpy
The fix in string_test.c is condiational compile the complained code for GCC 8.
Change-Id: Ic9341ca54ed7407210502197a28283bc42c26662
Signed-off-by: Steven Luong <sluong@cisco.com>
diff --git a/src/plugins/unittest/string_test.c b/src/plugins/unittest/string_test.c
index 41b4c61..cbceb8f 100644
--- a/src/plugins/unittest/string_test.c
+++ b/src/plugins/unittest/string_test.c
@@ -750,6 +750,8 @@
return -1;
/* Verify it against strncpy */
+#if __GNUC__ < 8
+ /* GCC 8 debian flunks this one at compile time */
strncpy (dst, src, strlen (src));
/* This better not fail but check anyhow */
@@ -758,6 +760,7 @@
return -1;
if (indicator != 0)
return -1;
+#endif
/* limited copy -- strlen src > n, copy up to n */
err = clib_strncpy (dst, "The price of greatness is responsibility.", 10);
@@ -791,12 +794,15 @@
if (indicator != 0)
return -1;
/* Verify it against strncpy */
+#if __GNUC__ < 8
+ /* GCC 8 debian flunks this one at compile time */
strncpy (dst, src, strlen (src));
if (strcmp_s (dst, clib_strnlen (dst, sizeof (dst)), src, &indicator) !=
EOK)
return -1;
if (indicator != 0)
return -1;
+#endif
/* zero length copy */
clib_strncpy (old_dst, dst, clib_strnlen (dst, sizeof (dst)));
@@ -1046,6 +1052,8 @@
if (indicator != 0)
return -1;
/* verify it against strncat */
+#if __GNUC__ < 8
+ /* GCC 8 debian flunks this one at compile time */
strcpy_s (dst, sizeof (dst), s1);
strncat (dst, s2, 13);
if (strcmp_s (dst, s1size - 1, "Two things are infinite: the universe ",
@@ -1053,6 +1061,7 @@
return -1;
if (indicator != 0)
return -1;
+#endif
/* negative stuff */
err = strncat_s (0, 0, 0, 1);
@@ -1169,6 +1178,8 @@
if (indicator != 0)
return -1;
/* verify it against strncat */
+#if __GNUC__ < 8
+ /* GCC 8 debian flunks this one at compile time */
strcpy_s (dst, sizeof (dst), s1);
strncat (dst, s2, 13);
if (strcmp_s (dst, s1size - 1, "Two things are infinite: the universe ",
@@ -1176,6 +1187,7 @@
return -1;
if (indicator != 0)
return -1;
+#endif
/* negative stuff */
err = clib_strncat (0, 0, 1);
diff --git a/src/vlib/linux/pci.c b/src/vlib/linux/pci.c
index ee3eebf..d31b3c9 100644
--- a/src/vlib/linux/pci.c
+++ b/src/vlib/linux/pci.c
@@ -466,7 +466,7 @@
clib_memset (&ifr, 0, sizeof ifr);
clib_memset (&drvinfo, 0, sizeof drvinfo);
ifr.ifr_data = (char *) &drvinfo;
- strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
+ clib_strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
drvinfo.cmd = ETHTOOL_GDRVINFO;
if (ioctl (fd, SIOCETHTOOL, &ifr) < 0)
@@ -482,7 +482,7 @@
continue;
clib_memset (&ifr, 0, sizeof (ifr));
- strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
+ clib_strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0)
{