From cb569337f22de160d61df0bdb7c06f17517835ab Mon Sep 17 00:00:00 2001 From: zhangshaoning Date: Thu, 16 Jan 2025 16:30:09 +0800 Subject: [PATCH] limit username length to 32 --- lib/chkname.c | 4 ++-- lib/chkname.h | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/chkname.c b/lib/chkname.c index 2b83361..ae6180f 100644 --- a/lib/chkname.c +++ b/lib/chkname.c @@ -75,9 +75,9 @@ static bool is_valid_name (const char *name) bool is_valid_user_name (const char *name) { /* - * User names length are limited by the kernel + * User names length are limited by USER_NAME_MAX_LENGTH */ - if (strlen (name) > sysconf(_SC_LOGIN_NAME_MAX)) { + if (strlen (name) > USER_NAME_MAX_LENGTH) { return false; } diff --git a/lib/chkname.h b/lib/chkname.h index 0771347..4af8f32 100644 --- a/lib/chkname.h +++ b/lib/chkname.h @@ -25,3 +25,7 @@ extern bool is_valid_user_name (const char *name); extern bool is_valid_group_name (const char *name); #endif + +#ifndef USER_NAME_MAX_LENGTH +#define USER_NAME_MAX_LENGTH 32 +#endif -- 2.18.2