Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 716 deletions

diff --git a/src/login/pam-module.c b/src/login/pam-module.c
deleted file mode 100644
index 08a9328b65..0000000000
--- a/src/login/pam-module.c
+++ /dev/null
@@ -1,716 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd 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
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/file.h>
-#include <pwd.h>
-#include <endian.h>
-#include <sys/capability.h>
-
-#include <security/pam_modules.h>
-#include <security/_pam_macros.h>
-#include <security/pam_modutil.h>
-#include <security/pam_ext.h>
-#include <security/pam_misc.h>
-
-#include <systemd/sd-daemon.h>
-
-#include "util.h"
-#include "audit.h"
-#include "macro.h"
-#include "strv.h"
-#include "dbus-common.h"
-#include "def.h"
-#include "socket-util.h"
-
-static int parse_argv(pam_handle_t *handle,
-                      int argc, const char **argv,
-                      char ***controllers,
-                      char ***reset_controllers,
-                      bool *kill_processes,
-                      char ***kill_only_users,
-                      char ***kill_exclude_users,
-                      bool *debug) {
-
-        unsigned i;
-
-        assert(argc >= 0);
-        assert(argc == 0 || argv);
-
-        for (i = 0; i < (unsigned) argc; i++) {
-                int k;
-
-                if (startswith(argv[i], "kill-session-processes=")) {
-                        if ((k = parse_boolean(argv[i] + 23)) < 0) {
-                                pam_syslog(handle, LOG_ERR, "Failed to parse kill-session-processes= argument.");
-                                return k;
-                        }
-
-                        if (kill_processes)
-                                *kill_processes = k;
-
-                } else if (startswith(argv[i], "kill-session=")) {
-                        /* As compatibility for old versions */
-
-                        if ((k = parse_boolean(argv[i] + 13)) < 0) {
-                                pam_syslog(handle, LOG_ERR, "Failed to parse kill-session= argument.");
-                                return k;
-                        }
-
-                        if (kill_processes)
-                                *kill_processes = k;
-
-                } else if (startswith(argv[i], "controllers=")) {
-
-                        if (controllers) {
-                                char **l;
-
-                                if (!(l = strv_split(argv[i] + 12, ","))) {
-                                        pam_syslog(handle, LOG_ERR, "Out of memory.");
-                                        return -ENOMEM;
-                                }
-
-                                strv_free(*controllers);
-                                *controllers = l;
-                        }
-
-                } else if (startswith(argv[i], "reset-controllers=")) {
-
-                        if (reset_controllers) {
-                                char **l;
-
-                                if (!(l = strv_split(argv[i] + 18, ","))) {
-                                        pam_syslog(handle, LOG_ERR, "Out of memory.");
-                                        return -ENOMEM;
-                                }
-
-                                strv_free(*reset_controllers);
-                                *reset_controllers = l;
-                        }
-
-                } else if (startswith(argv[i], "kill-only-users=")) {
-
-                        if (kill_only_users) {
-                                char **l;
-
-                                if (!(l = strv_split(argv[i] + 16, ","))) {
-                                        pam_syslog(handle, LOG_ERR, "Out of memory.");
-                                        return -ENOMEM;
-                                }
-
-                                strv_free(*kill_only_users);
-                                *kill_only_users = l;
-                        }
-
-                } else if (startswith(argv[i], "kill-exclude-users=")) {
-
-                        if (kill_exclude_users) {
-                                char **l;
-
-                                if (!(l = strv_split(argv[i] + 19, ","))) {
-                                        pam_syslog(handle, LOG_ERR, "Out of memory.");
-                                        return -ENOMEM;
-                                }
-
-                                strv_free(*kill_exclude_users);
-                                *kill_exclude_users = l;
-                        }
-
-                } else if (startswith(argv[i], "debug=")) {
-                        if ((k = parse_boolean(argv[i] + 6)) < 0) {
-                                pam_syslog(handle, LOG_ERR, "Failed to parse debug= argument.");
-                                return k;
-                        }
-
-                        if (debug)
-                                *debug = k;
-
-                } else if (startswith(argv[i], "create-session=") ||
-                           startswith(argv[i], "kill-user=")) {
-
-                        pam_syslog(handle, LOG_WARNING, "Option %s not supported anymore, ignoring.", argv[i]);
-
-                } else {
-                        pam_syslog(handle, LOG_ERR, "Unknown parameter '%s'.", argv[i]);
-                        return -EINVAL;
-                }
-        }
-
-        return 0;
-}
-
-static int get_user_data(
-                pam_handle_t *handle,
-                const char **ret_username,
-                struct passwd **ret_pw) {
-
-        const char *username = NULL;
-        struct passwd *pw = NULL;
-        uid_t uid;
-        int r;
-
-        assert(handle);
-        assert(ret_username);
-        assert(ret_pw);
-
-        r = audit_loginuid_from_pid(0, &uid);
-        if (r >= 0)
-                pw = pam_modutil_getpwuid(handle, uid);
-        else {
-                r = pam_get_user(handle, &username, NULL);
-                if (r != PAM_SUCCESS) {
-                        pam_syslog(handle, LOG_ERR, "Failed to get user name.");
-                        return r;
-                }
-
-                if (isempty(username)) {
-                        pam_syslog(handle, LOG_ERR, "User name not valid.");
-                        return PAM_AUTH_ERR;
-                }
-
-                pw = pam_modutil_getpwnam(handle, username);
-        }
-
-        if (!pw) {
-                pam_syslog(handle, LOG_ERR, "Failed to get user data.");
-                return PAM_USER_UNKNOWN;
-        }
-
-        *ret_pw = pw;
-        *ret_username = username ? username : pw->pw_name;
-
-        return PAM_SUCCESS;
-}
-
-static bool check_user_lists(
-                pam_handle_t *handle,
-                uid_t uid,
-                char **kill_only_users,
-                char **kill_exclude_users) {
-
-        const char *name = NULL;
-        char **l;
-
-        assert(handle);
-
-        if (uid == 0)
-                name = "root"; /* Avoid obvious NSS requests, to suppress network traffic */
-        else {
-                struct passwd *pw;
-
-                pw = pam_modutil_getpwuid(handle, uid);
-                if (pw)
-                        name = pw->pw_name;
-        }
-
-        STRV_FOREACH(l, kill_exclude_users) {
-                uid_t u;
-
-                if (parse_uid(*l, &u) >= 0)
-                        if (u == uid)
-                                return false;
-
-                if (name && streq(name, *l))
-                        return false;
-        }
-
-        if (strv_isempty(kill_only_users))
-                return true;
-
-        STRV_FOREACH(l, kill_only_users) {
-                uid_t u;
-
-                if (parse_uid(*l, &u) >= 0)
-                        if (u == uid)
-                                return true;
-
-                if (name && streq(name, *l))
-                        return true;
-        }
-
-        return false;
-}
-
-static int get_seat_from_display(const char *display, const char **seat, uint32_t *vtnr) {
-        char *p = NULL;
-        int r;
-        int fd;
-        union sockaddr_union sa;
-        struct ucred ucred;
-        socklen_t l;
-        char *tty;
-        int v;
-
-        assert(display);
-        assert(vtnr);
-
-        /* We deduce the X11 socket from the display name, then use
-         * SO_PEERCRED to determine the X11 server process, ask for
-         * the controlling tty of that and if it's a VC then we know
-         * the seat and the virtual terminal. Sounds ugly, is only
-         * semi-ugly. */
-
-        r = socket_from_display(display, &p);
-        if (r < 0)
-                return r;
-
-        fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
-        if (fd < 0) {
-                free(p);
-                return -errno;
-        }
-
-        zero(sa);
-        sa.un.sun_family = AF_UNIX;
-        strncpy(sa.un.sun_path, p, sizeof(sa.un.sun_path)-1);
-        free(p);
-
-        if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
-                close_nointr_nofail(fd);
-                return -errno;
-        }
-
-        l = sizeof(ucred);
-        r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l);
-        close_nointr_nofail(fd);
-
-        if (r < 0)
-                return -errno;
-
-        r = get_ctty(ucred.pid, NULL, &tty);
-        if (r < 0)
-                return r;
-
-        v = vtnr_from_tty(tty);
-        free(tty);
-
-        if (v < 0)
-                return v;
-        else if (v == 0)
-                return -ENOENT;
-
-        if (seat)
-                *seat = "seat0";
-        *vtnr = (uint32_t) v;
-
-        return 0;
-}
-
-_public_ PAM_EXTERN int pam_sm_open_session(
-                pam_handle_t *handle,
-                int flags,
-                int argc, const char **argv) {
-
-        struct passwd *pw;
-        bool kill_processes = false, debug = false;
-        const char *username, *id, *object_path, *runtime_path, *service = NULL, *tty = NULL, *display = NULL, *remote_user = NULL, *remote_host = NULL, *seat = NULL, *type, *class, *cvtnr = NULL;
-        char **controllers = NULL, **reset_controllers = NULL, **kill_only_users = NULL, **kill_exclude_users = NULL;
-        DBusError error;
-        uint32_t uid, pid;
-        DBusMessageIter iter;
-        dbus_bool_t kp;
-        int session_fd = -1;
-        DBusConnection *bus = NULL;
-        DBusMessage *m = NULL, *reply = NULL;
-        dbus_bool_t remote, existing;
-        int r;
-        uint32_t vtnr = 0;
-
-        assert(handle);
-
-        dbus_error_init(&error);
-
-        /* pam_syslog(handle, LOG_INFO, "pam-systemd initializing"); */
-
-        /* Make this a NOP on non-systemd systems */
-        if (sd_booted() <= 0)
-                return PAM_SUCCESS;
-
-        if (parse_argv(handle,
-                       argc, argv,
-                       &controllers, &reset_controllers,
-                       &kill_processes, &kill_only_users, &kill_exclude_users,
-                       &debug) < 0) {
-                r = PAM_SESSION_ERR;
-                goto finish;
-        }
-
-        r = get_user_data(handle, &username, &pw);
-        if (r != PAM_SUCCESS)
-                goto finish;
-
-        /* Make sure we don't enter a loop by talking to
-         * systemd-logind when it is actually waiting for the
-         * background to finish start-up. If the service is
-         * "systemd-shared" we simply set XDG_RUNTIME_DIR and
-         * leave. */
-
-        pam_get_item(handle, PAM_SERVICE, (const void**) &service);
-        if (streq_ptr(service, "systemd-shared")) {
-                char *p, *rt = NULL;
-
-                if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) pw->pw_uid) < 0) {
-                        r = PAM_BUF_ERR;
-                        goto finish;
-                }
-
-                r = parse_env_file(p, NEWLINE,
-                                   "RUNTIME", &rt,
-                                   NULL);
-                free(p);
-
-                if (r < 0 && r != -ENOENT) {
-                        r = PAM_SESSION_ERR;
-                        free(rt);
-                        goto finish;
-                }
-
-                if (rt)  {
-                        r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", rt, 0);
-                        free(rt);
-
-                        if (r != PAM_SUCCESS) {
-                                pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
-                                goto finish;
-                        }
-                }
-
-                r = PAM_SUCCESS;
-                goto finish;
-        }
-
-        if (kill_processes)
-                kill_processes = check_user_lists(handle, pw->pw_uid, kill_only_users, kill_exclude_users);
-
-        dbus_connection_set_change_sigpipe(FALSE);
-
-        bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
-        if (!bus) {
-                pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
-                r = PAM_SESSION_ERR;
-                goto finish;
-        }
-
-        m = dbus_message_new_method_call(
-                        "org.freedesktop.login1",
-                        "/org/freedesktop/login1",
-                        "org.freedesktop.login1.Manager",
-                        "CreateSession");
-        if (!m) {
-                pam_syslog(handle, LOG_ERR, "Could not allocate create session message.");
-                r = PAM_BUF_ERR;
-                goto finish;
-        }
-
-        uid = pw->pw_uid;
-        pid = getpid();
-
-        pam_get_item(handle, PAM_XDISPLAY, (const void**) &display);
-        pam_get_item(handle, PAM_TTY, (const void**) &tty);
-        pam_get_item(handle, PAM_RUSER, (const void**) &remote_user);
-        pam_get_item(handle, PAM_RHOST, (const void**) &remote_host);
-
-        seat = pam_getenv(handle, "XDG_SEAT");
-        if (isempty(seat))
-                seat = getenv("XDG_SEAT");
-
-        cvtnr = pam_getenv(handle, "XDG_VTNR");
-        if (isempty(cvtnr))
-                cvtnr = getenv("XDG_VTNR");
-
-        service = strempty(service);
-        tty = strempty(tty);
-        display = strempty(display);
-        remote_user = strempty(remote_user);
-        remote_host = strempty(remote_host);
-        seat = strempty(seat);
-
-        if (strchr(tty, ':')) {
-                /* A tty with a colon is usually an X11 display, place
-                 * there to show up in utmp. We rearrange things and
-                 * don't pretend that an X display was a tty */
-
-                if (isempty(display))
-                        display = tty;
-                tty = "";
-        } else if (streq(tty, "cron")) {
-                /* cron has been setting PAM_TTY to "cron" for a very long time
-                 * and it cannot stop doing that for compatibility reasons. */
-                tty = "";
-        }
-
-        /* If this fails vtnr will be 0, that's intended */
-        if (!isempty(cvtnr))
-                safe_atou32(cvtnr, &vtnr);
-
-        if (!isempty(display) && vtnr <= 0) {
-                if (isempty(seat))
-                        get_seat_from_display(display, &seat, &vtnr);
-                else if (streq(seat, "seat0"))
-                        get_seat_from_display(display, NULL, &vtnr);
-        }
-
-        type = !isempty(display) ? "x11" :
-                   !isempty(tty) ? "tty" : "unspecified";
-
-        class = pam_getenv(handle, "XDG_SESSION_CLASS");
-        if (isempty(class))
-                class = getenv("XDG_SESSION_CLASS");
-        if (isempty(class))
-                class = "user";
-
-        remote = !isempty(remote_host) &&
-                !streq(remote_host, "localhost") &&
-                !streq(remote_host, "localhost.localdomain");
-
-        if (!dbus_message_append_args(m,
-                                      DBUS_TYPE_UINT32, &uid,
-                                      DBUS_TYPE_UINT32, &pid,
-                                      DBUS_TYPE_STRING, &service,
-                                      DBUS_TYPE_STRING, &type,
-                                      DBUS_TYPE_STRING, &class,
-                                      DBUS_TYPE_STRING, &seat,
-                                      DBUS_TYPE_UINT32, &vtnr,
-                                      DBUS_TYPE_STRING, &tty,
-                                      DBUS_TYPE_STRING, &display,
-                                      DBUS_TYPE_BOOLEAN, &remote,
-                                      DBUS_TYPE_STRING, &remote_user,
-                                      DBUS_TYPE_STRING, &remote_host,
-                                      DBUS_TYPE_INVALID)) {
-                pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
-                r = PAM_BUF_ERR;
-                goto finish;
-        }
-
-        dbus_message_iter_init_append(m, &iter);
-
-        r = bus_append_strv_iter(&iter, controllers);
-        if (r < 0) {
-                pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
-                r = PAM_BUF_ERR;
-                goto finish;
-        }
-
-        r = bus_append_strv_iter(&iter, reset_controllers);
-        if (r < 0) {
-                pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
-                r = PAM_BUF_ERR;
-                goto finish;
-        }
-
-        kp = kill_processes;
-        if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &kp)) {
-                pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
-                r = PAM_BUF_ERR;
-                goto finish;
-        }
-
-        if (debug)
-                pam_syslog(handle, LOG_DEBUG, "Asking logind to create session: "
-                           "uid=%u pid=%u service=%s type=%s class=%s seat=%s vtnr=%u tty=%s display=%s remote=%s remote_user=%s remote_host=%s",
-                           uid, pid, service, type, class, seat, vtnr, tty, display, yes_no(remote), remote_user, remote_host);
-
-        reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
-        if (!reply) {
-                pam_syslog(handle, LOG_ERR, "Failed to create session: %s", bus_error_message(&error));
-                r = PAM_SESSION_ERR;
-                goto finish;
-        }
-
-        if (!dbus_message_get_args(reply, &error,
-                                   DBUS_TYPE_STRING, &id,
-                                   DBUS_TYPE_OBJECT_PATH, &object_path,
-                                   DBUS_TYPE_STRING, &runtime_path,
-                                   DBUS_TYPE_UNIX_FD, &session_fd,
-                                   DBUS_TYPE_STRING, &seat,
-                                   DBUS_TYPE_UINT32, &vtnr,
-                                   DBUS_TYPE_BOOLEAN, &existing,
-                                   DBUS_TYPE_INVALID)) {
-                pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", bus_error_message(&error));
-                r = PAM_SESSION_ERR;
-                goto finish;
-        }
-
-        if (debug)
-                pam_syslog(handle, LOG_DEBUG, "Reply from logind: "
-                           "id=%s object_path=%s runtime_path=%s session_fd=%d seat=%s vtnr=%u",
-                           id, object_path, runtime_path, session_fd, seat, vtnr);
-
-        r = pam_misc_setenv(handle, "XDG_SESSION_ID", id, 0);
-        if (r != PAM_SUCCESS) {
-                pam_syslog(handle, LOG_ERR, "Failed to set session id.");
-                goto finish;
-        }
-
-        r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", runtime_path, 0);
-        if (r != PAM_SUCCESS) {
-                pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
-                goto finish;
-        }
-
-        if (!isempty(seat)) {
-                r = pam_misc_setenv(handle, "XDG_SEAT", seat, 0);
-                if (r != PAM_SUCCESS) {
-                        pam_syslog(handle, LOG_ERR, "Failed to set seat.");
-                        goto finish;
-                }
-        }
-
-        if (vtnr > 0) {
-                char buf[11];
-                snprintf(buf, sizeof(buf), "%u", vtnr);
-                char_array_0(buf);
-
-                r = pam_misc_setenv(handle, "XDG_VTNR", buf, 0);
-                if (r != PAM_SUCCESS) {
-                        pam_syslog(handle, LOG_ERR, "Failed to set virtual terminal number.");
-                        goto finish;
-                }
-        }
-
-        r = pam_set_data(handle, "systemd.existing", INT_TO_PTR(!!existing), NULL);
-        if (r != PAM_SUCCESS) {
-                pam_syslog(handle, LOG_ERR, "Failed to install existing flag.");
-                return r;
-        }
-
-        if (session_fd >= 0) {
-                r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL);
-                if (r != PAM_SUCCESS) {
-                        pam_syslog(handle, LOG_ERR, "Failed to install session fd.");
-                        return r;
-                }
-        }
-
-        session_fd = -1;
-
-        r = PAM_SUCCESS;
-
-finish:
-        strv_free(controllers);
-        strv_free(reset_controllers);
-        strv_free(kill_only_users);
-        strv_free(kill_exclude_users);
-
-        dbus_error_free(&error);
-
-        if (bus) {
-                dbus_connection_close(bus);
-                dbus_connection_unref(bus);
-        }
-
-        if (m)
-                dbus_message_unref(m);
-
-        if (reply)
-                dbus_message_unref(reply);
-
-        if (session_fd >= 0)
-                close_nointr_nofail(session_fd);
-
-        return r;
-}
-
-_public_ PAM_EXTERN int pam_sm_close_session(
-                pam_handle_t *handle,
-                int flags,
-                int argc, const char **argv) {
-
-        const void *p = NULL, *existing = NULL;
-        const char *id;
-        DBusConnection *bus = NULL;
-        DBusMessage *m = NULL, *reply = NULL;
-        DBusError error;
-        int r;
-
-        assert(handle);
-
-        dbus_error_init(&error);
-
-        /* Only release session if it wasn't pre-existing when we
-         * tried to create it */
-        pam_get_data(handle, "systemd.existing", &existing);
-
-        id = pam_getenv(handle, "XDG_SESSION_ID");
-        if (id && !existing) {
-
-                /* Before we go and close the FIFO we need to tell
-                 * logind that this is a clean session shutdown, so
-                 * that it doesn't just go and slaughter us
-                 * immediately after closing the fd */
-
-                bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
-                if (!bus) {
-                        pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
-                        r = PAM_SESSION_ERR;
-                        goto finish;
-                }
-
-                m = dbus_message_new_method_call(
-                                "org.freedesktop.login1",
-                                "/org/freedesktop/login1",
-                                "org.freedesktop.login1.Manager",
-                                "ReleaseSession");
-                if (!m) {
-                        pam_syslog(handle, LOG_ERR, "Could not allocate release session message.");
-                        r = PAM_BUF_ERR;
-                        goto finish;
-                }
-
-                if (!dbus_message_append_args(m,
-                                              DBUS_TYPE_STRING, &id,
-                                              DBUS_TYPE_INVALID)) {
-                        pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
-                        r = PAM_BUF_ERR;
-                        goto finish;
-                }
-
-                reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
-                if (!reply) {
-                        pam_syslog(handle, LOG_ERR, "Failed to release session: %s", bus_error_message(&error));
-                        r = PAM_SESSION_ERR;
-                        goto finish;
-                }
-        }
-
-        r = PAM_SUCCESS;
-
-finish:
-        pam_get_data(handle, "systemd.session-fd", &p);
-        if (p)
-                close_nointr(PTR_TO_INT(p) - 1);
-
-        dbus_error_free(&error);
-
-        if (bus) {
-                dbus_connection_close(bus);
-                dbus_connection_unref(bus);
-        }
-
-        if (m)
-                dbus_message_unref(m);
-
-        if (reply)
-                dbus_message_unref(reply);
-
-        return r;
-}