libbb: code shrink

function                                             old     new   delta
xmalloc_ttyname                                       46      42      -4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index 05aa07ce80151077676aa072073f81fffc3dd4f9..a7068324112e7571433a3a733502cc513c0f62c0 100644 (file)
--- a/libbb/xfuncs_printf.c
+++ b/libbb/xfuncs_printf.c
@@ -541,13 +541,11 @@ int FAST_FUNC bb_xioctl(int fd, unsigned request, void *argp)
 
 char* FAST_FUNC xmalloc_ttyname(int fd)
 {
-       char *buf = xzalloc(128);
-       int r = ttyname_r(fd, buf, 127);
-       if (r) {
-               free(buf);
-               buf = NULL;
-       }
-       return buf;
+       char buf[128];
+       int r = ttyname_r(fd, buf, sizeof(buf) - 1);
+       if (r)
+               return NULL;
+       return xstrdup(buf);
 }
 
 void FAST_FUNC generate_uuid(uint8_t *buf)