taskset: disallow "taskset -p 0"

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

1 files changed, 2 insertions, 2 deletions

diff --git a/util-linux/taskset.c b/util-linux/taskset.c
index afe2f04d2..d2ef9b98f 100644
--- a/util-linux/taskset.c
+++ b/util-linux/taskset.c
@@ -218,7 +218,7 @@ static int process_pid_str(const char *pid_str, unsigned opts, char *aff)
         ul *mask;
         unsigned mask_size_in_bytes;
         const char *current_new;
-        pid_t pid = xatoi_positive(pid_str);
+        pid_t pid = !pid_str ? 0 : xatou_range(pid_str, 1, INT_MAX); /* disallow "0": "taskset -p 0" should fail */
 
         mask_size_in_bytes = SZOF_UL;
         current_new = "current";
@@ -343,7 +343,7 @@ int taskset_main(int argc UNUSED_PARAM, char **argv)
                 /* <aff> <cmd...> */
                 if (!*argv)
                         bb_show_usage();
-                process_pid_str("0", opts, aff);
+                process_pid_str(NULL, opts, aff);
                 BB_EXECVP_or_die(argv);
         }