JezK
Edit File: adduser
#! /usr/bin/perl # Copyright (C) 1997-1999 Guy Maor <maor@debian.org> # # Copyright (C) 1995 Ted Hajek <tedhajek@boombox.micro.umn.edu> # Ian A. Murdock <imurdock@gnu.ai.mit.edu> # # Thanks to Roland Bauerschmidt <rb@debian.org> for bugfixes and other # improvements. # # The general scheme of this program was adapted from the original # Debian "adduser" program by Ian A. Murdock <imurdock@gnu.ai.mit.edu>. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or (at # your option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to: # # Free Software Foundation # 51 Franklin Street, Fifth Floor # Boston, MA 02110 # USA use strict; use warnings; use Getopt::Long; use Debian::AdduserCommon; use constant RET_OK => 0; # OK use constant RET_OBJECT_ALREADY_EXISTS => 1; # the user or group does already exist, so the requested action cannot be performed use constant RET_INVALID_CHARS_IN_NAME => 1; # the provided name contains invalid characters use constant RET_ADDUSER_ABORTED => 1; # the program was aborted (eg via Ctrl+C) use constant RET_INVALID_CALL => 1; # getopt returned with "false" my $version = "3.134"; BEGIN { local $ENV{PERL_DL_NONLAZY}=1; eval 'use Locale::gettext'; if ($@) { *gettext = sub { shift }; *textdomain = sub { "" }; *LC_MESSAGES = sub { 5 }; } eval { require POSIX; import POSIX qw(setlocale); }; if ($@) { *setlocale = sub { return 1 }; } eval { require I18N::Langinfo; import I18N::Langinfo qw(langinfo YESEXPR NOEXPR); }; if ($@) { *langinfo = sub { return shift; }; *YESEXPR = sub { "^[yY]" }; *NOEXPR = sub { "^[nN]" }; } } setlocale(LC_MESSAGES, ""); textdomain("adduser"); my $yesexpr = langinfo(YESEXPR()); my %config; # configuration hash my $nogroup_id = getgrnam("nogroup") || 65534; $0 =~ s+.*/++; our $verbose = 1; # should we be verbose? my $name_check_level = 0; # should we allow bad names? my $ask_passwd = 1; # ask for a passwd? my $disabled_login = 0; # leave the new account disabled? our @configfiles; our @defaults = undef; our $found_group_opt = undef; our $found_sys_opt = undef; our $ingroup_name = undef; our $new_firstgid = undef; our $new_firstuid = undef; our $new_comment = undef; our $gid_option = undef; our $primary_gid = undef; our $new_lastgid = undef; our $new_lastuid = undef; our $new_uid = undef; our $no_create_home = undef; our $special_home = undef; our $special_shell = undef; our $add_extra_groups; our $add_extra_groups_old; # Global variables we need later my $existing_user = undef; my $existing_group = undef; my $new_name = undef; my $make_group_also = 0; my $home_dir = undef; my $undohome = undef; my $undouser = undef; my $undogroup = undef; my $shell = undef; my $first_uid = undef; my $last_uid = undef; my $first_gid = undef; my $last_gid = undef; my $dir_mode = undef; my $perm = undef; my %uid_pool; my %gid_pool; our @names; GetOptions( 'add-extra-groups' => \$add_extra_groups, 'add_extra_groups' => \$add_extra_groups_old, 'allow-all-names' => sub { $name_check_level = 2 }, 'allow-badname' => sub { $name_check_level = 1 unless $name_check_level }, 'allow-bad-names' => sub { $name_check_level = 1 unless $name_check_level }, 'comment=s' => \$new_comment, 'conf|c=s' => \@configfiles, 'debug' => sub { $verbose = 2 }, 'disabled-login' => sub { $disabled_login = 1; $ask_passwd = 0 }, 'disabled-password' => sub { $ask_passwd = 0 }, 'firstgid=i' => \$new_firstgid, 'firstuid=i' => \$new_firstuid, 'force-badname' => sub { $name_check_level = 1 unless $name_check_level }, 'gecos=s' => \$new_comment, 'gid=i' => \$gid_option, 'group' => \$found_group_opt, 'help|h' => sub { &usage; exit }, 'home=s' => \$special_home, 'ingroup=s' => \$ingroup_name, 'lastgid=i' => \$new_lastgid, 'lastuid=i' => \$new_lastuid, 'no-create-home' => \$no_create_home, 'quiet|q' => sub { $verbose = 0 }, 'shell=s' => \$special_shell, 'system' => \$found_sys_opt, 'uid=i' => \$new_uid, 'verbose' => sub { $verbose = 1 }, 'version|v' => sub { &version; exit }, ) or &usage_error; # everyone can issue "--help" and "--version", but only root can go on dief (gtx("Only root may add a user or group to the system.\n")) if ($> != 0); if(!@configfiles) { @defaults = ("/etc/adduser.conf"); } else { @defaults = (@configfiles); } # detect the right mode my $action = $0 eq "addgroup" ? "addgroup" : "adduser"; if (defined($found_sys_opt)) { $action = "addsysuser" if ($action eq "adduser"); $action = "addsysgroup" if ($action eq "addgroup"); } # explicitly set PATH, because super (1) cleans up the path and makes adduser unusable; # this is also a good idea for sudo (which doesn't clean up) $ENV{"PATH"}="/bin:/usr/bin:/sbin:/usr/sbin"; $ENV{"IFS"}=" \t\n"; ############################ # checks related to @names # ############################ while (defined(my $arg = shift(@ARGV))) { push (@names, $arg); } if ( (! defined $names[0]) || length($names[0]) == 0 || @names > 2) { dief (gtx("Only one or two names allowed.\n")); } if (@names == 2) { # must be addusertogroup if ($action eq "addsysuser" || $found_group_opt) { dief (gtx("Specify only one name in this mode.\n")) } if ($action eq "addgroup" or $action eq "addsysgroup") { dief (gtx("addgroup with two arguments is an unspecified operation.\n")); } $action = "addusertogroup"; $existing_user = shift (@names); $existing_group = shift (@names); } else { # 1 parameter, must be adduser $new_name = shift (@names); } ################################### # check for consistent parameters # ################################### if (!defined $add_extra_groups) { if( defined $add_extra_groups_old ) { $add_extra_groups = $add_extra_groups_old; } else { $add_extra_groups = 0; } } if ($action ne "addgroup" && defined($found_group_opt) +defined($ingroup_name) +defined($gid_option) > 1 ) { dief (gtx("The --group, --ingroup, and --gid options are mutually exclusive.\n")); } if ((defined($special_home)) && ($special_home !~ m+^/+ )) { dief (gtx("The home dir must be an absolute path.\n")); } if (defined($special_home) && $verbose) { warnf gtx("Warning: The home dir %s you specified already exists.\n"),$special_home if (!defined($no_create_home) && -d $special_home); warnf gtx("Warning: The home dir %s you specified can't be accessed: %s\n"), $special_home, $! if (defined($no_create_home) && ! -d $special_home); } if ($found_group_opt) { if ($action eq "addsysuser") { $make_group_also = 1; } elsif ($found_sys_opt) { $action = "addsysgroup"; } else { $action = "addgroup"; } } $ENV{"VERBOSE"} = $verbose; $ENV{"DEBUG"} = $verbose; # preseed configuration data and then read the config file preseed_config(\@defaults,\%config); # read the uid and gid pool if ($config{"uid_pool"}) { read_pool ($config{"uid_pool"}, "uid", \%uid_pool); } if ($config{"gid_pool"}) { read_pool ($config{"gid_pool"}, "gid", \%gid_pool); } &checkname($new_name) if defined $new_name; $SIG{'INT'} = $SIG{'QUIT'} = $SIG{'HUP'} = 'handler'; ##### # OK, we've processed the arguments. $action equals one of the following, # and the appropriate variables have been set: # # $action = "adduser" # $new_name - the name of the new user. # $ingroup_name | $gid_option - the group to add the user to # $special_home, $new_uid, $new_comment - optional overrides # $action = "addgroup" # $new_name - the name of the new group # $gid_option - optional override # $action = "addsysgroup" # $new_name - the name of the new group # $gid_option - optional override # $action = "addsysuser" # $new_name - the name of the new user # $make_group_also | $ingroup_name | $gid_option | 0 - which group # $special_home, $new_uid, $new_comment - optional overrides # $action = "addusertogroup" # $existing_user - the user to be added # $existing_group - the group to add her to ##### ################# ## addsysgroup ## ################# if ($action eq "addsysgroup") { acquire_lock(); # Check if requested group already exists and we can exit safely my $ret = existing_group_ok($new_name, $gid_option); if ($ret == 3) { warnf (gtx("The group `%s' already exists as a system group. Exiting.\n"), $new_name) if $verbose; exit RET_OK; } if ($ret == 1) { warnf (gtx("The group `%s' already exists and is not a system group. Exiting.\n"), $new_name); exit RET_OBJECT_ALREADY_EXISTS; } if ($ret == 2) { warnf (gtx("The group `%s' already exists, but has a different GID. Exiting.\n"), $new_name); exit RET_OBJECT_ALREADY_EXISTS; } if (defined($gid_option) && defined(getgrgid($gid_option))) { dief (gtx("The GID `%s' is already in use.\n"),$gid_option); } if (!defined($gid_option)) { $first_gid = $new_firstgid || $config{"first_system_gid"}; $last_gid = $new_lastgid || $config{"last_system_gid"}; $gid_option = &first_avail_gid($first_gid, $last_gid, $gid_pool{$new_name}{'id'}); if ($gid_option == -1) { warnf gtx("No GID is available in the range %d-%d (FIRST_SYS_GID - LAST_SYS_GID).\n"),$first_gid,$last_gid; dief (gtx("The group `%s' was not created.\n"),$new_name); } } printf (gtx("Adding group `%s' (GID %d) ...\n"),$new_name,$gid_option) if $verbose; my $groupadd = &which('groupadd'); &systemcall($groupadd, '-g', $gid_option, $new_name); release_lock(0); print (gtx("Done.\n")) if $verbose; exit RET_OK; } ############## ## addgroup ## ############## if ($action eq "addgroup") { acquire_lock(); if (defined getgrnam($new_name)) { dief (gtx("The group `%s' already exists.\n"),$new_name); } if (defined($gid_option) && defined(getgrgid($gid_option))) { dief (gtx("The GID `%s' is already in use.\n"),$gid_option) } if (!defined($gid_option)) { $first_gid = $new_firstgid || $config{"first_gid"}; $last_gid = $new_lastgid || $config{"last_gid"}; debugf( "Searching for gid with first_gid=%s, last_gid=%s, new_name=%s, gid_pool=%s", $first_gid, $last_gid, $new_name, $gid_pool{$new_name}{'id'} ); $gid_option = &first_avail_gid($first_gid, $last_gid, $gid_pool{$new_name}{'id'}); if ($gid_option == -1) { print STDERR "$0: "; printf STDERR gtx("No GID is available in the range %d-%d (FIRST_GID - LAST_GID).\n"),$first_gid,$last_gid; dief (gtx("The group `%s' was not created.\n"),$new_name); } } printf (gtx("Adding group `%s' (GID %d) ...\n"),$new_name,$gid_option) if $verbose; my $groupadd = &which('groupadd'); &systemcall($groupadd, '-g', $gid_option, $new_name); release_lock(0); print (gtx("Done.\n")) if $verbose; exit RET_OK; } #################### ## addusertogroup ## #################### if ($action eq 'addusertogroup') { dief(gtx("The user `%s' does not exist.\n"), $existing_user) if (!defined getpwnam($existing_user)); dief(gtx("The group `%s' does not exist.\n"), $existing_group) if (!defined getgrnam($existing_group)); if (&user_is_member($existing_user, $existing_group)) { warnf gtx("The user `%s' is already a member of `%s'.\n"), $existing_user, $existing_group if $verbose; exit RET_OK; } printf gtx("Adding user `%s' to group `%s' ...\n"), $existing_user, $existing_group if $verbose; acquire_lock(); &systemcall('/usr/sbin/usermod', '-a', '-G', $existing_group, $existing_user); release_lock(); print gtx("Done.\n") if $verbose; exit RET_OK; } ################ ## addsysuser ## ################ if ($action eq "addsysuser") { acquire_lock(); if (existing_user_ok($new_name, $new_uid) == 1) { # a user with this name already exists; it's a problem when it's not a system user my $tmp_u = getpwnam($new_name); if (($tmp_u >= $config{"first_system_uid"}) and ($tmp_u <= $config{"last_system_uid"})) { printf (gtx("The system user `%s' already exists. Exiting.\n"), $new_name) if $verbose; exit RET_OK } warnf (gtx("The user `%s' already exists, but is not a system user. Exiting.\n"), $new_name); exit RET_OBJECT_ALREADY_EXISTS; } if (existing_user_ok($new_name, $new_uid) == 2) { warnf (gtx("The user `%s' already exists with a different UID. Exiting.\n"), $new_name); exit RET_OBJECT_ALREADY_EXISTS; } if (!$ingroup_name && !defined($gid_option) && !$make_group_also) { $gid_option = $nogroup_id; } check_user_group(1); if (!defined($new_uid) && $make_group_also) { $new_uid = &first_avail_uid($new_firstuid || $config{"first_system_uid"}, $new_lastuid || $config{"last_system_uid"}, $uid_pool{$new_name}{'id'}); if ($new_uid == -1) { warnf gtx("No UID/GID pair is available in the range %d-%d (FIRST_SYS_UID - LAST_SYS_UID).\n"),$config{"first_system_uid"},$config{"last_system_uid"}; dief (gtx("The user `%s' was not created.\n"),$new_name); } $gid_option = &first_avail_gid($new_firstgid || $config{"first_system_gid"}, $new_lastgid || $config{"last_system_gid"}, $gid_pool{$new_name}{'id'}); $ingroup_name = $new_name; } elsif (!defined($new_uid) && !$make_group_also) { $new_uid = &first_avail_uid($new_firstuid || $config{"first_system_uid"}, $new_lastuid || $config{"last_system_uid"}, $uid_pool{$new_name}{'id'}); if ($new_uid == -1) { warnf gtx("No UID is available in the range %d-%d (FIRST_SYS_UID - LAST_SYS_UID).\n"),$config{"first_system_uid"},$config{"last_system_uid"}; dief (gtx("The user `%s' was not created.\n"),$new_name); } if (defined($gid_option)) { $ingroup_name = getgrgid($gid_option); } elsif ($ingroup_name) { $gid_option = getgrnam($ingroup_name); } else { dief (gtx("Internal error\n")); } } else { if (defined($gid_option)) { $ingroup_name = getgrgid($gid_option); } elsif ($ingroup_name) { $gid_option = getgrnam($ingroup_name); } elsif ($make_group_also){ $gid_option=$new_uid; $ingroup_name=$new_name; } else { dief (gtx("Internal error\n")); } } printf (gtx("Adding system user `%s' (UID %d) ...\n"),$new_name,$new_uid) if $verbose; # if we reach this point, and the group does already exist, we can use it. if ($make_group_also && !getgrnam($new_name)) { printf (gtx("Adding new group `%s' (GID %d) ...\n"),$new_name,$gid_option) if $verbose; $undogroup = $new_name; my $groupadd = &which('groupadd'); &systemcall($groupadd, '-g', $gid_option, $new_name); } printf gtx("Adding new user `%s' (UID %d) with group `%s' ...\n"),$new_name,$new_uid,$ingroup_name if $verbose; $home_dir = $special_home || $uid_pool{$new_name}{'home'} || '/nonexistent'; $no_create_home = $home_dir =~ /^\/+nonexistent(\/|$)/ ? 1 : $no_create_home; $shell = $special_shell || $uid_pool{$new_name}{'shell'} || '/usr/sbin/nologin'; $undouser = $new_name; &systemcall('/usr/sbin/useradd', '-r', '-K', sprintf('SYS_UID_MIN=%d', $new_firstuid || $config{'first_system_uid'}), '-K', sprintf('SYS_UID_MAX=%d', $new_lastuid || $config{'last_system_uid'}), '-d', $home_dir, '-g', $ingroup_name, '-s', $shell, '-u', $new_uid, $new_name); release_lock(0); if (defined($new_comment)) { &ch_comment($new_comment); } elsif ($uid_pool{$new_name}{'comment'}) { &ch_comment($uid_pool{$new_name}{'comment'}); } $primary_gid = $gid_option; create_homedir(0); exit RET_OK; } ############# ## adduser ## ############# if ($action eq "adduser") { acquire_lock(); $primary_gid=-1; my @supplemental_groups=(); debugf( "new_uid %s\n", $new_uid ); debugf( "ingroup_name %s, gid_option %s\n", $ingroup_name, $gid_option ); debugf( "usergroups %s\n", $config{"usergroups"} ); debugf( "users_gid %s, users_group %s\n", $config{"users_gid"}, $config{"users_group"} ); debugf( "primary_gid %s, supplemental groups %s\n", $primary_gid, join(", ",@supplemental_groups) ); if( defined($config{"users_gid"}) && defined($config{"users_group"}) ) { warnf gtx("USERS_GID and USERS_GROUP both given in configuration. This is an error.\n"); dief (gtx("The user `%s' was not created.\n"),$new_name); } if ($config{"usergroups"} =~ /yes/i) { debugf( "config usergroups == yes code path\n" ); $make_group_also = 1; if( $gid_option ) { $make_group_also = 0; $primary_gid = $gid_option; debugf( "gid_option defined %s, make_group_also 0, primary_gid=gid_option\n", $gid_option ); } if( $ingroup_name ) { $make_group_also = 0; $primary_gid = getgrnam($ingroup_name); debugf( "ingroup_name defined %s, make_group_also 0, primary_gid %s\n", $gid_option, $primary_gid ); } debugf( "make_group_also %s, primary_gid %s\n", $make_group_also, $primary_gid ); if( defined( $primary_gid) && $primary_gid == -1 && $make_group_also == 0 ) { if (defined($config{"users_gid"}) && $config{"users_gid"} != -1) { my @grgid=getgrgid($config{"users_gid"}); my $grname=$grgid[0]; debugf( "set primary_gid to users_gid %s %s\n", $config{"users_gid"}, $grname); $primary_gid = $config{"users_gid"}; } elsif (defined($config{"users_gid"}) && $config{"users_gid"} == -1) { # nothing } else { my $primary_group="users"; if (defined($config{"users_group"})) { $primary_group=$config{"users_group"}; } $primary_gid=getgrnam($primary_group); debugf( "set primary_gid to users_group %s %s\n", $primary_gid, $primary_group); } } else { if (defined($config{"users_gid"}) && $config{"users_gid"} != -1) { my @grgid=getgrgid($config{"users_gid"}); my $grname=$grgid[0]; debugf( "push users_gid %s %s to supplemental_groups\n", $config{"users_gid"}, $grname); push(@supplemental_groups, $grname); } elsif (defined($config{"users_gid"}) && $config{"users_gid"} == -1) { # nothing } else { my $supp_group="users"; if (defined($config{"users_group"})) { $supp_group=$config{"users_group"}; } debugf( "push %s to supplemental_groups\n", $supp_group ); push(@supplemental_groups, $supp_group); } } } else { debugf( "config usergroups != yes code path\n" ); if( defined($ingroup_name) ) { $primary_gid=getgrnam($ingroup_name); } elsif (defined($config{"users_gid"})) { debugf( "primary_gid = users_gid = %d\n", $primary_gid ); $primary_gid = $config{"users_gid"}; } else { if (defined($config{"users_group"})) { my @grgid=getgrnam($config{"users_group"}); my $grgid=$grgid[2]; debugf( "primary_gid = users_group %s %s\n", $config{"users_group"}, $grgid); $primary_gid = $grgid; } else { debugf( "primary_gid = literal 100\n"); $primary_gid = 100; } } if( $primary_gid == -1 ) { dief( "no primary GID for user set. User not created.\n" ); } } debugf( "primary_gid %s, supplemental groups %s\n", $primary_gid, join(", ",@supplemental_groups) ); if ( defined $ingroup_name || defined $gid_option ) { $make_group_also = 0; debugf( "set make_group_also 0, neither ingroup_name or gid_option defined\n" ); } check_user_group(0); $first_uid = $new_firstuid || $config{"first_uid"}; $last_uid = $new_lastuid || $config{"last_uid"}; if ($config{"usergroups"} =~ /yes/i) { $first_gid = $first_uid; $last_gid = $last_uid; } else { $first_gid = $new_firstgid || $config{"first_gid"}; $last_gid = $new_lastgid || $config{"last_gid"}; } debugf( "first_uid %s, last_uid %s, first_gid %s, last_gid %s\n", $first_uid, $last_uid, $first_gid, $last_gid ); printf (gtx("Adding user `%s' ...\n"),$new_name) if $verbose; if (!defined($new_uid)) { if ( defined $ingroup_name ) { $new_uid = &first_avail_uid( $first_uid, $last_uid, $uid_pool{$new_name}{'id'}); } else { my $first_uidgid = ($first_uid, $first_gid)[$first_uid > $first_gid]; my $last_uidgid = ($last_uid, $last_gid)[$last_uid < $last_gid]; # TODO: Check what happens when those ranges do not overlap $new_uid = &first_avail_uid_gid( $first_uidgid, $last_uidgid, $uid_pool{$new_name}{'id'}); debugf( "uidgid=%s, from first_uidgid %s, last_uidgid %s\n", $new_uid, $first_uidgid, $last_uidgid); } # TODO: user can specify different UID and GID here. # idea: split handling in uid/gid, which are equally the return value of # first_avail_uid_gid. If either pool_id is defined, set uid and gid from # distinct first_avail_uid and first_avail_gid calls. debugf( "new_uid %s selected\n", $new_uid); if ($new_uid == -1) { warnf gtx("No UID/GID pair is available in the range %d-%d (FIRST_UID - LAST_UID).\n"),$first_uid,$last_uid; dief (gtx("The user `%s' was not created.\n"),$new_name); } debugf( "gid_option %s, ingroup_name %s\n", $gid_option, $ingroup_name ); if ( defined $gid_option && $gid_option == -1 && defined $ingroup_name && $ingroup_name == "") { warnf gtx("USERGROUPS=no, USER_GID=-1 and USERS_GROUP empty. A user needs a primary group!\n"); dief (gtx("The user `%s' was not created.\n"), $new_name); } elsif (defined($gid_option) && $gid_option != -1) { $ingroup_name = getgrgid($gid_option); $primary_gid = $gid_option; debugf( "gid_option defined and not -1, ingroup_name %s, primary_gid %d\n", $ingroup_name, $primary_gid ); } elsif ($ingroup_name) { $primary_gid = getgrnam($ingroup_name); debugf( "ingroup_name defined %s, primary_gid %d\n", $ingroup_name, $primary_gid ); } elsif ( defined( $primary_gid ) ) { $ingroup_name = getgrgid($primary_gid); debugf( "primary_gid defined %d, ingroup_name %s\n", $primary_gid, $primary_gid ); } else { $ingroup_name = 'users'; $primary_gid = 100; debugf( "ingroup_name hard users, primary_gid hard 100\n" ); } if ($make_group_also) { $primary_gid = $new_uid; $ingroup_name = $new_name; debugf( "make_group_also %s, primary_gid %s, ingroup_name %s\n", $make_group_also, $primary_gid, $ingroup_name ); } } else { debugf( "new_uid %s, primary_gid %s, ingroup_name %s, make_group_also %s\n", $new_uid, $primary_gid, $ingroup_name, $make_group_also ); if (defined($gid_option)) { $ingroup_name = getgrgid($gid_option); $primary_gid = $gid_option; debugf( "gid_option defined %s, ingroup_name %s\n", $gid_option, $ingroup_name ); } elsif (defined($primary_gid) && $primary_gid != -1) { $ingroup_name = getgrgid($primary_gid); debugf( "primary_gid defined %s, ingroup_name %s\n", $primary_gid, $ingroup_name ); } elsif ($ingroup_name) { $primary_gid = getgrnam($ingroup_name); debugf( "ingroup_name defined %s, primary_gid %s\n", $ingroup_name, $primary_gid ); } elsif ($make_group_also) { $primary_gid=$new_uid; $ingroup_name=$new_name; debugf( "make_group_also %s, primary_gid defined %s, ingroup_name %s\n", $make_group_also, $primary_gid, $ingroup_name ); } else { debugf( "no gid_option, no primary_gid, no ingroup_name, no make_group_also\n" ); dief (gtx("Internal error interpreting parameter combination\n")); } } debugf ("make_group_also %s\n", $make_group_also ); if ($make_group_also) { $undogroup = $new_name; my $groupadd = &which('groupadd'); if( defined( $primary_gid ) ) { printf (gtx("Adding new group `%s' (%d) ...\n"),$new_name,$primary_gid) if $verbose; &systemcall($groupadd, '-g', $primary_gid, $new_name); } else { printf (gtx("Adding new group `%s' (new group ID) ...\n"),$new_name) if $verbose; &systemcall($groupadd, $new_name); $primary_gid = getgrnam($new_name); debugf( "new group '%s' created with GID %d", $new_name, $primary_gid ); } } if ($verbose) { my @grgid=getgrgid($primary_gid); my $grname=$grgid[0]; printf gtx("Adding new user `%s' (%d) with group `%s (%d)' ...\n"),$new_name,$new_uid,$grname,$primary_gid; } $home_dir = $special_home || $uid_pool{$new_name}{'home'} || &homedir($new_name, $ingroup_name); if( !$disabled_login ) { $shell = $special_shell || $uid_pool{$new_name}{'shell'} || $config{"dshell"}; } else { $shell = $special_shell || $uid_pool{$new_name}{'shell'} || "/usr/sbin/nologin"; } $undouser = $new_name; my $useradd = &which('useradd'); &systemcall($useradd, '-d', $home_dir, '-g', $primary_gid, '-s', $shell, '-u', $new_uid, $new_name); create_homedir (1); # copy skeleton data # useradd without -p has left the account disabled (password string is '!') my $yesexpr = langinfo(YESEXPR()); my $noexpr = langinfo(NOEXPR()); if ($ask_passwd) { PASSWD: for (;;) { my $passwd = &which('passwd'); # do _not_ use systemcall() here, since systemcall() dies on # non-zero exit code and we need to do special handling here! system($passwd, $new_name); my $ok = $?>>8; if ($ok != 0) { my $answer; # hm, error, should we break now? warnf (gtx("Permission denied\n")) if ($ok == 1); warnf (gtx("invalid combination of options\n")) if ($ok == 2); warnf (gtx("unexpected failure, nothing done\n")) if ($ok == 3); warnf (gtx("unexpected failure, passwd file missing\n")) if ($ok == 4); warnf (gtx("passwd file busy, try again\n")) if ($ok == 5); warnf (gtx("invalid argument to option\n")) if ($ok == 6); # Translators: [y/N] has to be replaced by values defined in your # locale. You can see by running "locale noexpr" which regular # expression will be checked to find positive answer. PROMPT: for (;;) { print (gtx("Try again? [y/N] ")); chop ($answer=<STDIN>); last PROMPT if ($answer =~ m/$yesexpr/o); last PASSWD if ($answer =~ m/$noexpr/o); last PASSWD if (!$answer); } } else { last; ## passwd ok } } } if (defined($new_comment)) { &ch_comment($new_comment); } elsif ($uid_pool{$new_name}{'comment'}) { &ch_comment($uid_pool{$new_name}{'comment'}); } else { my $noexpr = langinfo(NOEXPR()); my $yesexpr = langinfo(YESEXPR()); CHFN: for (;;) { my $chfn = &which('chfn'); &systemcall($chfn, $new_name); # Translators: [y/N] has to be replaced by values defined in your # locale. You can see by running "locale yesexpr" which regular # expression will be checked to find positive answer. PROMPT: for (;;) { print (gtx("Is the information correct? [Y/n] ")); chop (my $answer=<STDIN>); last PROMPT if ($answer =~ m/$noexpr/o); last CHFN if ($answer =~ m/$yesexpr/o); last CHFN if (!$answer); } } } if ( ( $add_extra_groups || $config{"add_extra_groups"} ) && defined($config{"extra_groups"}) ) { push (@supplemental_groups, split(/\s+/,$config{"extra_groups"})); } if ( @supplemental_groups ) { if ($verbose) { printf (gtx("Adding new user `%s' to supplemental / extra groups `%s' ...\n"), $new_name, join(", ", @supplemental_groups)); } foreach my $newgrp ( @supplemental_groups ) { debugf( "newgrp %s\n", $newgrp); if (!defined getgrnam($newgrp)) { warnf (gtx("The group `%s' does not exist.\n"),$newgrp); next; } if (&user_is_member($new_name, $newgrp)) { warnf gtx("The user `%s' is already a member of `%s'.\n"), $new_name,$newgrp if $verbose; next; } printf gtx("Adding user `%s' to group `%s' ...\n"),$new_name,$newgrp if $verbose; my $gpasswd = &which('gpasswd'); &systemcall($gpasswd, '-M', join(',', get_group_members($newgrp), $new_name), $newgrp); } } if ($config{"quotauser"}) { printf (gtx("Setting quota for user `%s' to values of user `%s' ...\n"), $new_name, $config{quotauser}); my $edquota = &which('edquota'); &systemcall($edquota, '-p', $config{quotauser}, $new_name); } &systemcall('/usr/local/sbin/adduser.local', $new_name, $new_uid, $primary_gid, $home_dir) if (-x "/usr/local/sbin/adduser.local"); release_lock(0); exit RET_OK; } # # we never go here # # calculate home directory sub homedir { my $dir = $config{"dhome"}; $dir .= '/' . $_[1] if ($config{"grouphomes"} =~ /yes/i); $dir .= '/' . substr($_[0],0,1) if ($config{"letterhomes"} =~ /yes/i); $dir .= '/' . $_[0]; return $dir; } # create_homedir -- create the homedirectory # parameter # 1: $copy_skeleton: # if 0 -> don't copy the skeleton data # if 1 -> copy the files in /etc/skel to the newly created home directory # return values: # none sub create_homedir { my ($copy_skeleton) = @_; if ($home_dir =~ /^\/+nonexistent(\/|$)/) { printf gtx("Not creating `%s'.\n"), $home_dir if $verbose; } elsif ($no_create_home) { printf gtx("Not creating home directory `%s'.\n"), $home_dir if $verbose; } elsif (-e $home_dir) { warnf gtx("The home directory `%s' already exists. Not touching this directory.\n"), $home_dir if $verbose && !$no_create_home; my @homedir_stat = stat($home_dir); my $home_uid = $homedir_stat[4]; my $home_gid = $homedir_stat[5]; if (($home_uid != $new_uid) || ($home_gid != $primary_gid)) { warnf gtx("Warning: The home directory `%s' does not belong to the user you are currently creating.\n"), $home_dir; } undef @homedir_stat; undef $home_uid; undef $home_gid; } else { printf gtx("Creating home directory `%s' ...\n"),$home_dir if $verbose; $undohome = $home_dir; &mktree($home_dir) || &cleanup(sprintf(gtx("Couldn't create home directory `%s': %s.\n"), $home_dir, $!)); chown($new_uid, $primary_gid, $home_dir) || &cleanup("chown $new_uid:$primary_gid $home_dir: $!\n"); $dir_mode = get_dir_mode(); chmod ($dir_mode, $home_dir) || &cleanup("chmod $dir_mode $home_dir: $!\n"); if ($config{"skel"} && $copy_skeleton) { printf gtx("Copying files from `%s' ...\n"),$config{skel} if $verbose; open(my $FIND, "cd $config{skel}; find . -print |") || &cleanup(sprintf(gtx("fork for `find' failed: %s\n"), $!)); while (<$FIND>) { chop; next if ($_ eq "."); next if ($_ =~ qr/$config{skel_ignore_regex}/ ); ©_to_dir($config{"skel"}, $_, $home_dir, $new_uid, $primary_gid, ($config{"setgid_home"} =~ /yes/i)); } } } } # mktree: create a directory and all parent directories, we don't care about the rights and so on # parameters: # tree: the path # return values: # none sub mktree { my($tree) = @_; my($done, @path); my $default_dir_mode = 0755; $tree =~ s:^/*(.*)/*$:$1:; # chop off leading & trailing slashes @path = split(/\//, $tree); $done = ""; while (@path) { $done .= '/' . shift(@path); -d $done || mkdir($done, $default_dir_mode) || return 0; } return 1; } # existing_user_ok: check if there's already a user present on the system which satisfies the requirements # parameter: # new_name: the name of the user to check # new_uid : the UID of the user # return values: # 0 if the the user doesn't exist # 1 if the user already exists with the specified uid (or $new_uid wasn't specified) # 2 if the user already exists, but $new_uid doesn't matches its uid sub existing_user_ok { my($new_name,$new_uid) = @_; my ($dummy1,$dummy2,$uid); if (($dummy1,$dummy2,$uid) = getpwnam($new_name)) { if( defined($new_uid) && $uid == $new_uid ) { return 1; } if (! defined($new_uid)) { return 1; } # TODO: do we really need this code? Range check shouldn't performed here # also, we might be checking a normal user as well here if( $uid >= $config{"first_system_uid"} && $uid <= $config{"last_system_uid" } ) { return 2; } } else { return 0; } } # existing_group_ok: check if there's already a group which satiesfies the requirements # parameter: # new_name: the name of the group # new_gid : the GID of the group # return values: # 0 if the group doesn't exist # 1 if the group already exists with the specified gid (or $gid_option wasn't specified) # 2 if the group already exists, but $gid_option doesn't match its gid # 3 if the group already exists inside the system range sub existing_group_ok { my($new_name,$new_gid) = @_; my ($dummy1,$dummy2,$gid); if (($dummy1,$dummy2,$gid) = getgrnam($new_name)) { # TODO: is this check required? There shouldn't be any gid outside of our allowed range anyways ... # also, we might be checking a normal user as well here if( $gid >= $config{"first_system_gid"} && $gid <= $config{"last_system_gid" } ) { return 3; } if (! defined($new_gid)) { return 1; } if ($gid == $new_gid) { return 1; } else { return 2; } } else { return 0; } } # check_user_group: ??? # parameters: # system: 0 if the user isn't a system user, 1 otherwise # return values: # # todo: not sure whether global variables apply fine here. sub check_user_group { my ($system) = @_; debugf( "check_user_group %s called, make_group_also %s\n", $system, $make_group_also ); if( !$system || !existing_user_ok($new_name, $new_uid) ) { if( defined getpwnam($new_name) ) { if( $system ) { dief (gtx("The user `%s' already exists, and is not a system user.\n"),$new_name); } else { dief (gtx("The user `%s' already exists.\n"),$new_name); } } dief (gtx("The UID %d is already in use.\n"),$new_uid) if (defined($new_uid) && getpwuid($new_uid)); } if ($make_group_also) { debugf( "make_group_also 1, new_name %s, new_uid %s\n", $new_name, $new_uid ); if( !$system || !existing_group_ok($new_name, $new_uid) ) { dief (gtx("The group `%s' already exists.\n"),$new_name) if (defined getgrnam($new_name)); dief (gtx("The GID %d is already in use.\n"),$new_uid) if (defined($new_uid) && defined(getgrgid($new_uid))); } } else { dief (gtx("The group `%s' does not exist.\n"),$ingroup_name) if ($ingroup_name && !defined(getgrnam($ingroup_name))); dief (gtx("The GID %d does not exist.\n"),$gid_option) if (defined($gid_option) && !defined(getgrgid($gid_option))); } debugf( "return from check_user_group\n" ); } # copy_to_dir : # parameters: # fromdir # file # todir # newi # newg # sgiddir # return values: # none sub copy_to_dir { my($fromdir, $file, $todir, $newu, $newg, $sgiddir) = @_; if (-l "$fromdir/$file") { my $target=readlink("$fromdir/$file") or &cleanup("readlink: $!\n"); my $curgid="$)"; my $curuid="$>"; my $error=""; $)="$newg"; $>="$newu"; symlink("$target", "$todir/$file") or $error="$!"; $>="$curuid"; $)="$curgid"; if( "$error" ne "" ) { &cleanup("symlink: $!\n"); } return; } elsif (-f "$fromdir/$file") { open (FILE, "$fromdir/$file") || &cleanup("open $fromdir/$file: $!"); open (NEWFILE, ">$todir/$file") || &cleanup("open >$todir/$file: $!"); (print NEWFILE <FILE>) || &cleanup("print $todir/$file: $!"); close FILE; close(NEWFILE) || &cleanup("close $todir/$file "); } elsif (-d "$fromdir/$file") { mkdir("$todir/$file", 700) || &cleanup("mkdir: $!"); } else { &cleanup(sprintf((gtx("Cannot deal with %s.\nIt is not a dir, file, or symlink.\n")), "$fromdir/$file")); } chown($newu, $newg, "$todir/$file") || &cleanup("chown $newu:$newg $todir/$file: $!\n"); $perm = (stat("$fromdir/$file"))[2] & 07777; $perm |= 02000 if (-d "$fromdir/$file" && ($perm & 010) && $sgiddir); chmod($perm, "$todir/$file") || &cleanup("chmod $todir/$file: $!\n"); } # checkname: perform some sanity checks # parameters: # name: the name to check # return values: # none (exits on error) sub checkname { my ($name) = @_; my $ieee_regex = '^[_.A-Za-z0-9][-\@_.A-Za-z0-9]*\$?$'; my $min_regex = qr{^[^-+~:,\s/][^:,\s/]*$}; my $name_regex_var = $found_sys_opt ? 'SYS_NAME_REGEX' : 'NAME_REGEX'; my $name_regex = $config{lc $name_regex_var}; if ($name =~ /^[\d]+$/) { # this check cannot be turned off warnf gtx("To avoid ambiguity with numerical UIDs, usernames which consist of only digits are not allowed.\n"); exit RET_INVALID_CHARS_IN_NAME; } if (length $name > 32) { # this check cannot be turned off warnf gtx("Usernames must be no more than 32 bytes in length; note that if you are using Unicode characters, the character limit will be less than 32.\n"); exit RET_INVALID_CHARS_IN_NAME; } if ($name !~ $min_regex) { # this check cannot be turned off warnf gtx("To avoid problems, the username must not start with a dash, plus sign, or tilde, and it must not contain any of the following: colon, comma, slash, or any whitespace characters including spaces, tabs, and newlines.\n"); exit RET_INVALID_CHARS_IN_NAME; } return if ($name =~ qr/$name_regex/); if ($name !~ $ieee_regex && $name_check_level < 2) { warnf (gtx("To avoid problems, the username should consist only of letters, digits, underscores, periods, at signs and dashes, and not start with a dash (as defined by IEEE Std 1003.1-2001). For compatibility with Samba machine accounts, \$ is also supported at the end of the username. (Use the `--allow-all-names' option to bypass this restriction.)\n")); exit RET_INVALID_CHARS_IN_NAME; } if ($name_check_level) { print (gtx("Allowing use of questionable username.\n")) if ($verbose); } else { warnf (gtx("Please enter a username matching the regular expression configured via the %s configuration variable. Use the `--allow-bad-names' option to relax this check or reconfigure %s in configuration.\n"), $name_regex_var, $name_regex_var); exit RET_INVALID_CHARS_IN_NAME; } } # first_avail_uid: return the first available uid in given range # parameters: # min, max: the range # pool_id: user id suggested from pool # return values: # -1 if no free uid is available # otherwise the choosen uid sub first_avail_uid { my ($min, $max, $pool_id) = @_; if (defined ($pool_id)) { return $pool_id if (!defined(getpwuid($pool_id))); return -1; } printf (gtx("Selecting UID from range %d to %d ...\n"),$min,$max) if ($verbose > 1); my $t = $min; while ($t <= $max) { return $t if (!defined(getpwuid($t))); $t++; } return -1; # nothing available } # first_avail_gid: return the first available gid in given range # parameters: # min, max: the range # pool_id: group id suggested from pool # return values: # -1 if no free gid is available # otherwise the choosen gid sub first_avail_gid { my ($min, $max, $pool_id) = @_; if (defined ($pool_id)) { return $pool_id if (!defined(getgrgid($pool_id))); return -1; } printf (gtx("Selecting GID from range %d to %d ...\n"),$min,$max) if ($verbose > 1); my $t = $min; while ($t <= $max) { return $t if (!defined(getgrgid($t))); $t++; } return -1; # nothing available } # first_avail_uid_gid: return the first available id in given range # that is both available as uid and gid # parameters: # min, max: the range # pool_id: user id suggested from pool # return values: # -1 if no free id is available # otherwise the choosen id sub first_avail_uid_gid { my ($min, $max, $pool_id) = @_; if (defined ($pool_id)) { return $pool_id if (!defined(getgrgid($pool_id))); return -1; } printf (gtx("Selecting UID/GID from range %d to %d ...\n"),$min,$max) if ($verbose > 1); my $t = $min; while ($t <= $max) { return $t if (!defined(getgrgid($t)) && !defined(getpwuid($t))); $t++; } return -1; # nothing available } sub ch_comment { my $chfn = &which('chfn'); my $comment = shift; if($comment =~ /,/) { my($comment_name,$comment_room,$comment_work,$comment_home,$comment_other) = split(/,/,$comment); &systemcall($chfn, '-f', $comment_name, '-r', $comment_room, $new_name); &systemcall($chfn,'-w',$comment_work,$new_name) if(defined($comment_work)); &systemcall($chfn,'-h',$comment_home,$new_name) if(defined($comment_home)); &systemcall($chfn,'-o',$comment_other,$new_name) if(defined($comment_other)); } else { &systemcall($chfn, '-f', $comment, $new_name); } } # user is member of group? sub user_is_member { my($user, $group) = @_; for (split(/ /, (getgrnam($group))[3])) { return 1 if ($user eq $_); } return 0; } sub cleanup { my ($msg) = @_; printf (gtx("Stopped: %s\n"),$msg); if ($undohome) { printf (gtx("Removing directory `%s' ...\n"),$undohome); &systemcall('rm', '-rf', $undohome); } if ($undouser) { printf (gtx("Removing user `%s' ...\n"),$undouser); &systemcall('userdel', $undouser); } if ($undogroup) { printf (gtx("Removing group `%s' ...\n"),$undogroup); &systemcall('groupdel', $undogroup); } exit RET_ADDUSER_ABORTED; } sub handler { my($sig) = @_; # Translators: the variable %s is INT, QUIT, or HUP. # Please do not insert a space character between SIG and %s. &cleanup(sprintf(gtx("Caught a SIG%s.\n"), $sig)); } sub version { printf (gtx("adduser version %s\n\n"), $version); print gtx("Adds a user or group to the system. For detailed copyright information, please refer to /usr/share/doc/adduser/copyright. \n"); print gtx( "This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, /usr/share/common-licenses/GPL, for more details. "); } sub usage { printf gtx( "adduser [--uid id] [--firstuid id] [--lastuid id] [--gid id] [--firstgid id] [--lastgid id] [--ingroup group] [--add-extra-groups] [--shell shell] [--comment comment] [--home dir] [--no-create-home] [--allow-all-names] [--allow-bad-names] [--disabled-password] [--disabled-login] [--conf file] [--quiet] [--verbose] [--debug] user Add a normal user adduser --system [--uid id] [--group] [--ingroup group] [--gid id] [--shell shell] [--comment comment] [--home dir] [--no-create-home] [--conf file] [--quiet] [--verbose] [--debug] user Add a system user adduser --group [--gid ID] [--firstgid id] [--lastgid id] [--conf file] [--quiet] [--verbose] [--debug] group addgroup [--gid ID] [--firstgid id] [--lastgid id] [--conf file] [--quiet] [--verbose] [--debug] group Add a user group addgroup --system [--gid id] [--conf file] [--quiet] [--verbose] [--debug] group Add a system group adduser USER GROUP Add an existing user to an existing group\n"); } sub usage_error { &usage; exit(RET_INVALID_CALL); } # get_dir_mode: return the appropriate permissions mode for a home directory # parameters: # none # return value: # a valid octal mode sub get_dir_mode { my $setgid = $config{"setgid_home"} =~ /yes/i; my $mode = $found_sys_opt ? $config{"sys_dir_mode"} : $config{"dir_mode"}; if(!defined($mode) || ! ($mode =~ /[0-7]{3}/ || $mode =~ /[0-7]{4}/)) { $mode = ($found_sys_opt) ? "755" : "0700"; } if($setgid && (length($mode) == 3 || $mode =~ /^[0-1|4-5][0-7]{3}$/)) { $mode += 2000; } return oct($mode); } # Local Variables: # mode:cperl # cperl-indent-level:4 # End: # vim: tabstop=4 shiftwidth=4 expandtab