From: Ye Liu Add -h/--help option to display usage information and improve code style. Signed-off-by: Ye Liu --- tools/mm/page_owner_sort.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/mm/page_owner_sort.c b/tools/mm/page_owner_sort.c index 880e36df0c11..202eafed66a9 100644 --- a/tools/mm/page_owner_sort.c +++ b/tools/mm/page_owner_sort.c @@ -669,14 +669,15 @@ int main(int argc, char **argv) { "pid", required_argument, NULL, 1 }, { "tgid", required_argument, NULL, 2 }, { "name", required_argument, NULL, 3 }, - { "cull", required_argument, NULL, 4 }, - { "sort", required_argument, NULL, 5 }, + { "cull", required_argument, NULL, 4 }, + { "sort", required_argument, NULL, 5 }, + { "help", no_argument, NULL, 'h' }, { 0, 0, 0, 0}, }; compare_flag = COMP_NO_FLAG; - while ((opt = getopt_long(argc, argv, "admnpstP", longopts, NULL)) != -1) + while ((opt = getopt_long(argc, argv, "admnpstPh", longopts, NULL)) != -1) switch (opt) { case 'a': compare_flag |= COMP_ALLOC; @@ -702,6 +703,9 @@ int main(int argc, char **argv) case 'n': compare_flag |= COMP_COMM; break; + case 'h': + usage(); + exit(0); case 1: filter = filter | FILTER_PID; fc.pids = parse_nums_list(optarg, &fc.pids_size); -- 2.43.0