Shadow-add user creation

rashmi · September 4, 2019, 12:32pm

Hello All,
I have installed vsftpd and configured it for a ftp on extended storage in Openwrt router.
I have also installed "shadow-useradd shadow-passwd shadow-usermod and shadow-
common" to add and modify the user name and password. The problem is that i am
trying to add or modify the user name with atleast one uppercase letter, but with the
uppercase letter i'm getting the following error.

        useradd: invalid user name Axx_01
        usermod: invalid user name Axx_01

can anyone tell me is the shadow-useradd and shadow-usermod support creating the user name with upper case letter.

Regards,
Rashmi H R

anon50098793 · September 4, 2019, 12:43pm

tried without the underscore dude? much faster way to get the answer....

rashmi · September 4, 2019, 1:48pm

Thanks for your response. Without special character also i'm getting the same error.

Regards,
Rashmi H R

yousong · September 4, 2019, 2:41pm

~~Likely this is a bug. Please consider opening an issue report at https://github.com/openwrt/packages/issues~~

EDIT: uppcase letters is not allowed by shadow as valid name.

github.com

shadow-maint/shadow/blob/master/libmisc/chkname.c#L49-L84


static bool is_valid_name (const char *name)
{
	/*
	 * User/group names must match [a-z_][a-z0-9_-]*[$]
	 */
	if (('\0' == *name) ||
	    !((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) {
		return false;
	}


	while ('\0' != *++name) {
		if (!(( ('a' <= *name) && ('z' >= *name) ) ||
		      ( ('0' <= *name) && ('9' >= *name) ) ||
		      ('_' == *name) ||
		      ('-' == *name) ||
		      ( ('$' == *name) && ('\0' == *(name + 1)) )
		     )) {
			return false;
		}
	}

This file has been truncated. show original

system · September 14, 2019, 2:41pm

This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.