Replace example code's use of strncpy() with strscpy() functions. Using
strncpy() is considered deprecated:
https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20210602202914.4079123-1-keescook@chromium.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
char name[128];
if (ioctl(fd, JSIOCGNAME(sizeof(name)), name) < 0)
- strncpy(name, "Unknown", sizeof(name));
+ strscpy(name, "Unknown", sizeof(name));
printf("Name: %s\n", name);
struct ifreq s_ifr;
...
- strncpy (s_ifr.ifr_name, "eth0", sizeof(s_ifr.ifr_name));
+ strscpy_pad (s_ifr.ifr_name, "eth0", sizeof(s_ifr.ifr_name));
/* get interface index of eth0 */
ioctl(this->socket, SIOCGIFINDEX, &s_ifr);
*/
ifr.ifr_flags = IFF_TUN;
if( *dev )
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
+ strscpy_pad(ifr.ifr_name, dev, IFNAMSIZ);
if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
close(fd);