sort: in -s handling, return 1/-1, not 1/0 compare result

function                                             old     new   delta
compare_keys                                         794     795      +1

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

1 files changed, 3 insertions, 2 deletions

diff --git a/coreutils/sort.c b/coreutils/sort.c
index 8ffd0cf44..c24b62681 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -345,7 +345,7 @@ static int compare_keys(const void *xarg, const void *yarg)
                 /* So far lines are "the same" */
 
                 if (option_mask32 & FLAG_s) {
-                        /* "Stable sort": later line is "smaller",
+                        /* "Stable sort": later line is "greater than",
                          * IOW: do not allow qsort() to swap equal lines.
                          */
                         uint32_t *p32;
@@ -362,7 +362,8 @@ static int compare_keys(const void *xarg, const void *yarg)
                         p32 = (void*)(line + len);
                         y32 = *p32;
 
-                        retval = x32 > y32;
+                        /* If x > y, 1, else -1 */
+                        retval = (x32 > y32) * 2 - 1;
                 } else
                 if (!(option_mask32 & FLAG_no_tie_break)) {
                         /* fallback sort */