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, 794 deletions

diff --git a/src/login/sd-login.c b/src/login/sd-login.c
deleted file mode 100644
index 45e3bb8dcd..0000000000
--- a/src/login/sd-login.c
+++ /dev/null
@@ -1,794 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2011 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 <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/inotify.h>
-
-#include "util.h"
-#include "cgroup-util.h"
-#include "macro.h"
-#include "sd-login.h"
-#include "strv.h"
-
-_public_ int sd_pid_get_session(pid_t pid, char **session) {
-        int r;
-        char *cgroup, *p;
-
-        if (pid < 0)
-                return -EINVAL;
-
-        if (!session)
-                return -EINVAL;
-
-        r = cg_pid_get_cgroup(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        if (!startswith(cgroup, "/user/")) {
-                free(cgroup);
-                return -ENOENT;
-        }
-
-        p = strchr(cgroup + 6, '/');
-        if (!p) {
-                free(cgroup);
-                return -ENOENT;
-        }
-
-        p++;
-        if (startswith(p, "shared/") || streq(p, "shared")) {
-                free(cgroup);
-                return -ENOENT;
-        }
-
-        p = strndup(p, strcspn(p, "/"));
-        free(cgroup);
-
-        if (!p)
-                return -ENOMEM;
-
-        *session = p;
-        return 0;
-}
-
-_public_ int sd_pid_get_unit(pid_t pid, char **unit) {
-
-        if (pid < 0)
-                return -EINVAL;
-
-        if (!unit)
-                return -EINVAL;
-
-        return cg_pid_get_unit(pid, unit);
-}
-
-_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
-        int r;
-        char *root, *cgroup, *p, *cc;
-        struct stat st;
-
-        if (pid < 0)
-                return -EINVAL;
-
-        if (!uid)
-                return -EINVAL;
-
-        r = cg_pid_get_cgroup(pid, &root, &cgroup);
-        if (r < 0)
-                return r;
-
-        if (!startswith(cgroup, "/user/")) {
-                free(cgroup);
-                free(root);
-                return -ENOENT;
-        }
-
-        p = strchr(cgroup + 6, '/');
-        if (!p) {
-                free(cgroup);
-                return -ENOENT;
-        }
-
-        p++;
-        p += strcspn(p, "/");
-        *p = 0;
-
-        r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, root, cgroup, &cc);
-        free(root);
-        free(cgroup);
-
-        if (r < 0)
-                return -ENOMEM;
-
-        r = lstat(cc, &st);
-        free(cc);
-
-        if (r < 0)
-                return -errno;
-
-        if (!S_ISDIR(st.st_mode))
-                return -ENOTDIR;
-
-        *uid = st.st_uid;
-        return 0;
-}
-
-_public_ int sd_uid_get_state(uid_t uid, char**state) {
-        char *p, *s = NULL;
-        int r;
-
-        if (!state)
-                return -EINVAL;
-
-        if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
-                return -ENOMEM;
-
-        r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
-        free(p);
-
-        if (r == -ENOENT) {
-                free(s);
-                s = strdup("offline");
-                if (!s)
-                        return -ENOMEM;
-
-                *state = s;
-                return 0;
-        } else if (r < 0) {
-                free(s);
-                return r;
-        } else if (!s)
-                return -EIO;
-
-        *state = s;
-        return 0;
-}
-
-_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) {
-        char *p, *w, *t, *state, *s = NULL;
-        size_t l;
-        int r;
-        const char *variable;
-
-        if (!seat)
-                return -EINVAL;
-
-        variable = require_active ? "ACTIVE_UID" : "UIDS";
-
-        p = strappend("/run/systemd/seats/", seat);
-        if (!p)
-                return -ENOMEM;
-
-        r = parse_env_file(p, NEWLINE, variable, &s, NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        }
-
-        if (!s)
-                return -EIO;
-
-        if (asprintf(&t, "%lu", (unsigned long) uid) < 0) {
-                free(s);
-                return -ENOMEM;
-        }
-
-        FOREACH_WORD(w, l, s, state) {
-                if (strncmp(t, w, l) == 0) {
-                        free(s);
-                        free(t);
-
-                        return 1;
-                }
-        }
-
-        free(s);
-        free(t);
-
-        return 0;
-}
-
-static int uid_get_array(uid_t uid, const char *variable, char ***array) {
-        char *p, *s = NULL;
-        char **a;
-        int r;
-
-        if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
-                return -ENOMEM;
-
-        r = parse_env_file(p, NEWLINE,
-                           variable, &s,
-                           NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-
-                if (r == -ENOENT) {
-                        if (array)
-                                *array = NULL;
-                        return 0;
-                }
-
-                return r;
-        }
-
-        if (!s) {
-                if (array)
-                        *array = NULL;
-                return 0;
-        }
-
-        a = strv_split(s, " ");
-        free(s);
-
-        if (!a)
-                return -ENOMEM;
-
-        strv_uniq(a);
-        r = strv_length(a);
-
-        if (array)
-                *array = a;
-        else
-                strv_free(a);
-
-        return r;
-}
-
-_public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) {
-        return uid_get_array(
-                        uid,
-                        require_active == 0 ? "ONLINE_SESSIONS" :
-                        require_active > 0  ? "ACTIVE_SESSIONS" :
-                                              "SESSIONS",
-                        sessions);
-}
-
-_public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) {
-        return uid_get_array(
-                        uid,
-                        require_active == 0 ? "ONLINE_SEATS" :
-                        require_active > 0  ? "ACTIVE_SEATS" :
-                                              "SEATS",
-                        seats);
-}
-
-static int file_of_session(const char *session, char **_p) {
-        char *p;
-        int r;
-
-        assert(_p);
-
-        if (session)
-                p = strappend("/run/systemd/sessions/", session);
-        else {
-                char *buf;
-
-                r = sd_pid_get_session(0, &buf);
-                if (r < 0)
-                        return r;
-
-                p = strappend("/run/systemd/sessions/", buf);
-                free(buf);
-        }
-
-        if (!p)
-                return -ENOMEM;
-
-        *_p = p;
-        return 0;
-}
-
-_public_ int sd_session_is_active(const char *session) {
-        int r;
-        char *p, *s = NULL;
-
-        r = file_of_session(session, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        }
-
-        if (!s)
-                return -EIO;
-
-        r = parse_boolean(s);
-        free(s);
-
-        return r;
-}
-
-_public_ int sd_session_get_state(const char *session, char **state) {
-        char *p, *s = NULL;
-        int r;
-
-        if (!state)
-                return -EINVAL;
-
-        r = file_of_session(session, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        } else if (!s)
-                return -EIO;
-
-        *state = s;
-        return 0;
-}
-
-_public_ int sd_session_get_uid(const char *session, uid_t *uid) {
-        int r;
-        char *p, *s = NULL;
-
-        if (!uid)
-                return -EINVAL;
-
-        r = file_of_session(session, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE, "UID", &s, NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        }
-
-        if (!s)
-                return -EIO;
-
-        r = parse_uid(s, uid);
-        free(s);
-
-        return r;
-}
-
-static int session_get_string(const char *session, const char *field, char **value) {
-        char *p, *s = NULL;
-        int r;
-
-        if (!value)
-                return -EINVAL;
-
-        r = file_of_session(session, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE, field, &s, NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        }
-
-        if (isempty(s))
-                return -ENOENT;
-
-        *value = s;
-        return 0;
-}
-
-_public_ int sd_session_get_seat(const char *session, char **seat) {
-        return session_get_string(session, "SEAT", seat);
-}
-
-_public_ int sd_session_get_service(const char *session, char **service) {
-        return session_get_string(session, "SERVICE", service);
-}
-
-_public_ int sd_session_get_type(const char *session, char **type) {
-        return session_get_string(session, "TYPE", type);
-}
-
-_public_ int sd_session_get_class(const char *session, char **class) {
-        return session_get_string(session, "CLASS", class);
-}
-
-_public_ int sd_session_get_display(const char *session, char **display) {
-        return session_get_string(session, "DISPLAY", display);
-}
-
-static int file_of_seat(const char *seat, char **_p) {
-        char *p;
-        int r;
-
-        assert(_p);
-
-        if (seat)
-                p = strappend("/run/systemd/seats/", seat);
-        else {
-                char *buf;
-
-                r = sd_session_get_seat(NULL, &buf);
-                if (r < 0)
-                        return r;
-
-                p = strappend("/run/systemd/seats/", buf);
-                free(buf);
-        }
-
-        if (!p)
-                return -ENOMEM;
-
-        *_p = p;
-        return 0;
-}
-
-_public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
-        char *p, *s = NULL, *t = NULL;
-        int r;
-
-        if (!session && !uid)
-                return -EINVAL;
-
-        r = file_of_seat(seat, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE,
-                           "ACTIVE", &s,
-                           "ACTIVE_UID", &t,
-                           NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                free(t);
-                return r;
-        }
-
-        if (session && !s)  {
-                free(t);
-                return -ENOENT;
-        }
-
-        if (uid && !t) {
-                free(s);
-                return -ENOENT;
-        }
-
-        if (uid && t) {
-                r = parse_uid(t, uid);
-                if (r < 0) {
-                        free(t);
-                        free(s);
-                        return r;
-                }
-        }
-
-        free(t);
-
-        if (session && s)
-                *session = s;
-        else
-                free(s);
-
-        return 0;
-}
-
-_public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) {
-        char *p, *s = NULL, *t = NULL, **a = NULL;
-        uid_t *b = NULL;
-        unsigned n = 0;
-        int r;
-
-        r = file_of_seat(seat, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE,
-                           "SESSIONS", &s,
-                           "ACTIVE_SESSIONS", &t,
-                           NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                free(t);
-                return r;
-        }
-
-        if (s) {
-                a = strv_split(s, " ");
-                if (!a) {
-                        free(s);
-                        free(t);
-                        return -ENOMEM;
-                }
-        }
-
-        free(s);
-
-        if (uids && t) {
-                char *w, *state;
-                size_t l;
-
-                FOREACH_WORD(w, l, t, state)
-                        n++;
-
-                if (n == 0)
-                        b = NULL;
-                else {
-                        unsigned i = 0;
-
-                        b = new(uid_t, n);
-                        if (!b) {
-                                strv_free(a);
-                                return -ENOMEM;
-                        }
-
-                        FOREACH_WORD(w, l, t, state) {
-                                char *k;
-
-                                k = strndup(w, l);
-                                if (!k) {
-                                        free(t);
-                                        free(b);
-                                        strv_free(a);
-                                        return -ENOMEM;
-                                }
-
-                                r = parse_uid(k, b + i);
-                                free(k);
-                                if (r < 0)
-                                        continue;
-
-                                i++;
-                        }
-                }
-        }
-
-        free(t);
-
-        r = strv_length(a);
-
-        if (sessions)
-                *sessions = a;
-        else
-                strv_free(a);
-
-        if (uids)
-                *uids = b;
-
-        if (n_uids)
-                *n_uids = n;
-
-        return r;
-}
-
-static int seat_get_can(const char *seat, const char *variable) {
-        char *p, *s = NULL;
-        int r;
-
-        r = file_of_seat(seat, &p);
-        if (r < 0)
-                return r;
-
-        r = parse_env_file(p, NEWLINE,
-                           variable, &s,
-                           NULL);
-        free(p);
-
-        if (r < 0) {
-                free(s);
-                return r;
-        }
-
-        if (s) {
-                r = parse_boolean(s);
-                free(s);
-        } else
-                r = 0;
-
-        return r;
-}
-
-_public_ int sd_seat_can_multi_session(const char *seat) {
-        return seat_get_can(seat, "CAN_MULTI_SESSION");
-}
-
-_public_ int sd_seat_can_tty(const char *seat) {
-        return seat_get_can(seat, "CAN_TTY");
-}
-
-_public_ int sd_seat_can_graphical(const char *seat) {
-        return seat_get_can(seat, "CAN_GRAPHICAL");
-}
-
-_public_ int sd_get_seats(char ***seats) {
-        return get_files_in_directory("/run/systemd/seats/", seats);
-}
-
-_public_ int sd_get_sessions(char ***sessions) {
-        return get_files_in_directory("/run/systemd/sessions/", sessions);
-}
-
-_public_ int sd_get_uids(uid_t **users) {
-        DIR *d;
-        int r = 0;
-        unsigned n = 0;
-        uid_t *l = NULL;
-
-        d = opendir("/run/systemd/users/");
-        if (!d)
-                return -errno;
-
-        for (;;) {
-                struct dirent *de;
-                union dirent_storage buf;
-                int k;
-                uid_t uid;
-
-                k = readdir_r(d, &buf.de, &de);
-                if (k != 0) {
-                        r = -k;
-                        goto finish;
-                }
-
-                if (!de)
-                        break;
-
-                dirent_ensure_type(d, de);
-
-                if (!dirent_is_file(de))
-                        continue;
-
-                k = parse_uid(de->d_name, &uid);
-                if (k < 0)
-                        continue;
-
-                if (users) {
-                        if ((unsigned) r >= n) {
-                                uid_t *t;
-
-                                n = MAX(16, 2*r);
-                                t = realloc(l, sizeof(uid_t) * n);
-                                if (!t) {
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                l = t;
-                        }
-
-                        assert((unsigned) r < n);
-                        l[r++] = uid;
-                } else
-                        r++;
-        }
-
-finish:
-        if (d)
-                closedir(d);
-
-        if (r >= 0) {
-                if (users)
-                        *users = l;
-        } else
-                free(l);
-
-        return r;
-}
-
-static inline int MONITOR_TO_FD(sd_login_monitor *m) {
-        return (int) (unsigned long) m - 1;
-}
-
-static inline sd_login_monitor* FD_TO_MONITOR(int fd) {
-        return (sd_login_monitor*) (unsigned long) (fd + 1);
-}
-
-_public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) {
-        int fd, k;
-        bool good = false;
-
-        if (!m)
-                return -EINVAL;
-
-        fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
-        if (fd < 0)
-                return errno;
-
-        if (!category || streq(category, "seat")) {
-                k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE);
-                if (k < 0) {
-                        close_nointr_nofail(fd);
-                        return -errno;
-                }
-
-                good = true;
-        }
-
-        if (!category || streq(category, "session")) {
-                k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE);
-                if (k < 0) {
-                        close_nointr_nofail(fd);
-                        return -errno;
-                }
-
-                good = true;
-        }
-
-        if (!category || streq(category, "uid")) {
-                k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE);
-                if (k < 0) {
-                        close_nointr_nofail(fd);
-                        return -errno;
-                }
-
-                good = true;
-        }
-
-        if (!good) {
-                close_nointr(fd);
-                return -EINVAL;
-        }
-
-        *m = FD_TO_MONITOR(fd);
-        return 0;
-}
-
-_public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) {
-        int fd;
-
-        if (!m)
-                return NULL;
-
-        fd = MONITOR_TO_FD(m);
-        close_nointr(fd);
-
-        return NULL;
-}
-
-_public_ int sd_login_monitor_flush(sd_login_monitor *m) {
-
-        if (!m)
-                return -EINVAL;
-
-        return flush_fd(MONITOR_TO_FD(m));
-}
-
-_public_ int sd_login_monitor_get_fd(sd_login_monitor *m) {
-
-        if (!m)
-                return -EINVAL;
-
-        return MONITOR_TO_FD(m);
-}