diff options
Diffstat (limited to 'scripts/system/vyatta_check_username.pl')
| -rw-r--r-- | scripts/system/vyatta_check_username.pl | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/scripts/system/vyatta_check_username.pl b/scripts/system/vyatta_check_username.pl index 254b3417..778f8976 100644 --- a/scripts/system/vyatta_check_username.pl +++ b/scripts/system/vyatta_check_username.pl @@ -44,9 +44,24 @@ sub finduser { } foreach my $user (@ARGV) { - my $uid = getpwnam($user); + # enforce recommendation from useradd man page + # Debian, the only constraints are that usernames must neither start + # with a dash (-) nor contain a colon (:) or a whitespace (space: , end + # of line: \n, tabulation: \t, etc.). Note that using a slash (/) may + # break the default algorithm for the definition of the users home + # directory. + die "$user : illegal characters in user name\n" + unless ($user =~ /^\w[^ \t\n\r\v\f:\/]*$/); + + # It is usually recommended to only use usernames that begin with a + # lower case letter or an underscore + # followed by lower case letters, digits, underscores, or dashes. + # They can end with a dollar sign. In regular expression terms: + warn "$user : username should only contain lowercase digits and underscore\n" + unless ($user =~ /^[a-z_][a-z0-9_-]*\$?$/); # User does not exist in system, its okay + my $uid = getpwnam($user); next unless defined($uid); # System accounts should not be listed in vyatta configuration |