Force nul-termination of strings after vsnprintf().

[tinc] / src / tincctl.c

diff --git a/src/tincctl.c b/src/tincctl.c
index 9f9df6f..a0a7633 100644 (file)
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -560,6 +560,7 @@ bool sendline(int fd, char *format, ...) {
 
        va_start(ap, format);
        blen = vsnprintf(buffer, sizeof buffer, format, ap);
+       buffer[sizeof buffer - 1] = 0;
        va_end(ap);
 
        if(blen < 1 || blen >= sizeof buffer)
@@ -885,7 +886,7 @@ static int cmd_start(int argc, char *argv[]) {
 
        if(!pid) {
                close(pfd[0]);
-               char buf[100] = "";
+               char buf[100];
                snprintf(buf, sizeof buf, "%d", pfd[1]);
                setenv("TINC_UMBILICAL", buf, true);
                exit(execvp(c, nargv));