libbb: code shrink

function                                             old     new   delta
xmalloc_ttyname                                       46      42      -4

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

1 files changed, 5 insertions, 7 deletions

diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index 05aa07ce8..a70683241 100644
--- 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)