top: speedup if tty info is not requested

1 files changed, 3 insertions, 1 deletions

diff --git a/libbb/procps.c b/libbb/procps.c
index 879cc105a..e04ff34ff 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -243,10 +243,12 @@ procps_status_t* procps_scan(procps_status_t* sp, int flags)
                         sp->tty_str[0] = '?';
                         /* sp->tty_str[1] = '\0'; - done by memset */
                         tty = fast_strtoul_10(cp, &cp);
-                        if (tty) /* tty field of "0" means "no tty" */
+                        if (tty && (flags & PSSCAN_TTY)) {
+                                /* tty field of "0" means "no tty" */
                                 snprintf(sp->tty_str, sizeof(sp->tty_str), "%u,%u",
                                         (tty >> 8) & 0xfff, /* major */
                                         (tty & 0xff) | ((tty >> 12) & 0xfff00));
+                        }
                         cp = skip_fields(cp, 6); /* tpgid, flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
                         sp->utime = fast_strtoul_10(cp, &cp);
                         sp->stime = fast_strtoul_10(cp, &cp);