ps: fix buglet, add microoptimization

1 files changed, 4 insertions, 6 deletions

diff --git a/procps/ps.c b/procps/ps.c
index e18bd2a58..12f6b65d1 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -216,18 +216,16 @@ static void format_process(const procps_status_t *ps)
                 // POSIX: Any field need not be meaningful in all
                 // implementations. In such a case a hyphen ( '-' )
                 // should be output in place of the field value.
-                if (!*p) {
-                        *p++ = '-';
-                        *p = '\0';
+                if (!p[0]) {
+                        p[0] = '-';
+                        p[1] = '\0';
                 }
                 len = strlen(p);
                 p += len;
                 len = out[i].width - len + 1;
                 if (++i == out_cnt) /* do not pad last field */
                         break;
-                while (len--)
-                        *p++ = ' ';
-                *p = '\0';
+                p += sprintf(p, "%*s", len, "");
         }
         printf("%.*s\n", terminal_width, buffer);
 }