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, 764 deletions

diff --git a/src/tty-ask-password-agent/tty-ask-password-agent.c b/src/tty-ask-password-agent/tty-ask-password-agent.c
deleted file mode 100644
index 052c10e7d5..0000000000
--- a/src/tty-ask-password-agent/tty-ask-password-agent.c
+++ /dev/null
@@ -1,764 +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 <stdbool.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <stddef.h>
-#include <sys/poll.h>
-#include <sys/inotify.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <sys/signalfd.h>
-#include <fcntl.h>
-
-#include "util.h"
-#include "mkdir.h"
-#include "path-util.h"
-#include "conf-parser.h"
-#include "utmp-wtmp.h"
-#include "socket-util.h"
-#include "ask-password-api.h"
-#include "strv.h"
-#include "build.h"
-
-static enum {
-        ACTION_LIST,
-        ACTION_QUERY,
-        ACTION_WATCH,
-        ACTION_WALL
-} arg_action = ACTION_QUERY;
-
-static bool arg_plymouth = false;
-static bool arg_console = false;
-
-static int ask_password_plymouth(
-                const char *message,
-                usec_t until,
-                const char *flag_file,
-                bool accept_cached,
-                char ***_passphrases) {
-
-        int fd = -1, notify = -1;
-        union sockaddr_union sa;
-        char *packet = NULL;
-        ssize_t k;
-        int r, n;
-        struct pollfd pollfd[2];
-        char buffer[LINE_MAX];
-        size_t p = 0;
-        enum {
-                POLL_SOCKET,
-                POLL_INOTIFY
-        };
-
-        assert(_passphrases);
-
-        if (flag_file) {
-                if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-        }
-
-        if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        zero(sa);
-        sa.sa.sa_family = AF_UNIX;
-        strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
-        if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
-                log_error("Failed to connect to Plymouth: %m");
-                r = -errno;
-                goto finish;
-        }
-
-        if (accept_cached) {
-                packet = strdup("c");
-                n = 1;
-        } else
-                asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n);
-
-        if (!packet) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        if ((k = loop_write(fd, packet, n+1, true)) != n+1) {
-                r = k < 0 ? (int) k : -EIO;
-                goto finish;
-        }
-
-        zero(pollfd);
-        pollfd[POLL_SOCKET].fd = fd;
-        pollfd[POLL_SOCKET].events = POLLIN;
-        pollfd[POLL_INOTIFY].fd = notify;
-        pollfd[POLL_INOTIFY].events = POLLIN;
-
-        for (;;) {
-                int sleep_for = -1, j;
-
-                if (until > 0) {
-                        usec_t y;
-
-                        y = now(CLOCK_MONOTONIC);
-
-                        if (y > until) {
-                                r = -ETIME;
-                                goto finish;
-                        }
-
-                        sleep_for = (int) ((until - y) / USEC_PER_MSEC);
-                }
-
-                if (flag_file)
-                        if (access(flag_file, F_OK) < 0) {
-                                r = -errno;
-                                goto finish;
-                        }
-
-                if ((j = poll(pollfd, notify > 0 ? 2 : 1, sleep_for)) < 0) {
-
-                        if (errno == EINTR)
-                                continue;
-
-                        r = -errno;
-                        goto finish;
-                } else if (j == 0) {
-                        r = -ETIME;
-                        goto finish;
-                }
-
-                if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0)
-                        flush_fd(notify);
-
-                if (pollfd[POLL_SOCKET].revents == 0)
-                        continue;
-
-                if ((k = read(fd, buffer + p, sizeof(buffer) - p)) <= 0) {
-                        r = k < 0 ? -errno : -EIO;
-                        goto finish;
-                }
-
-                p += k;
-
-                if (p < 1)
-                        continue;
-
-                if (buffer[0] == 5) {
-
-                        if (accept_cached) {
-                                /* Hmm, first try with cached
-                                 * passwords failed, so let's retry
-                                 * with a normal password request */
-                                free(packet);
-                                packet = NULL;
-
-                                if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0) {
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                if ((k = loop_write(fd, packet, n+1, true)) != n+1) {
-                                        r = k < 0 ? (int) k : -EIO;
-                                        goto finish;
-                                }
-
-                                accept_cached = false;
-                                p = 0;
-                                continue;
-                        }
-
-                        /* No password, because UI not shown */
-                        r = -ENOENT;
-                        goto finish;
-
-                } else if (buffer[0] == 2 || buffer[0] == 9) {
-                        uint32_t size;
-                        char **l;
-
-                        /* One ore more answers */
-                        if (p < 5)
-                                continue;
-
-                        memcpy(&size, buffer+1, sizeof(size));
-                        size = le32toh(size);
-                        if (size+5 > sizeof(buffer)) {
-                                r = -EIO;
-                                goto finish;
-                        }
-
-                        if (p-5 < size)
-                                continue;
-
-                        if (!(l = strv_parse_nulstr(buffer + 5, size))) {
-                                r = -ENOMEM;
-                                goto finish;
-                        }
-
-                        *_passphrases = l;
-                        break;
-
-                } else {
-                        /* Unknown packet */
-                        r = -EIO;
-                        goto finish;
-                }
-        }
-
-        r = 0;
-
-finish:
-        if (notify >= 0)
-                close_nointr_nofail(notify);
-
-        if (fd >= 0)
-                close_nointr_nofail(fd);
-
-        free(packet);
-
-        return r;
-}
-
-static int parse_password(const char *filename, char **wall) {
-        char *socket_name = NULL, *message = NULL, *packet = NULL;
-        uint64_t not_after = 0;
-        unsigned pid = 0;
-        int socket_fd = -1;
-        bool accept_cached = false;
-
-        const ConfigTableItem items[] = {
-                { "Ask", "Socket",       config_parse_string,   0, &socket_name   },
-                { "Ask", "NotAfter",     config_parse_uint64,   0, &not_after     },
-                { "Ask", "Message",      config_parse_string,   0, &message       },
-                { "Ask", "PID",          config_parse_unsigned, 0, &pid           },
-                { "Ask", "AcceptCached", config_parse_bool,     0, &accept_cached },
-                { NULL, NULL, NULL, 0, NULL }
-        };
-
-        FILE *f;
-        int r;
-
-        assert(filename);
-
-        f = fopen(filename, "re");
-        if (!f) {
-                if (errno == ENOENT)
-                        return 0;
-
-                log_error("open(%s): %m", filename);
-                return -errno;
-        }
-
-        r = config_parse(filename, f, NULL, config_item_table_lookup, (void*) items, true, NULL);
-        if (r < 0) {
-                log_error("Failed to parse password file %s: %s", filename, strerror(-r));
-                goto finish;
-        }
-
-        if (!socket_name) {
-                log_error("Invalid password file %s", filename);
-                r = -EBADMSG;
-                goto finish;
-        }
-
-        if (not_after > 0) {
-                if (now(CLOCK_MONOTONIC) > not_after) {
-                        r = 0;
-                        goto finish;
-                }
-        }
-
-        if (pid > 0 &&
-            kill(pid, 0) < 0 &&
-            errno == ESRCH) {
-                r = 0;
-                goto finish;
-        }
-
-        if (arg_action == ACTION_LIST)
-                printf("'%s' (PID %u)\n", message, pid);
-        else if (arg_action == ACTION_WALL) {
-                char *_wall;
-
-                if (asprintf(&_wall,
-                             "%s%sPassword entry required for \'%s\' (PID %u).\r\n"
-                             "Please enter password with the systemd-tty-ask-password-agent tool!",
-                             *wall ? *wall : "",
-                             *wall ? "\r\n\r\n" : "",
-                             message,
-                             pid) < 0) {
-                        r = log_oom();
-                        goto finish;
-                }
-
-                free(*wall);
-                *wall = _wall;
-        } else {
-                union {
-                        struct sockaddr sa;
-                        struct sockaddr_un un;
-                } sa;
-                size_t packet_length = 0;
-
-                assert(arg_action == ACTION_QUERY ||
-                       arg_action == ACTION_WATCH);
-
-                if (access(socket_name, W_OK) < 0) {
-
-                        if (arg_action == ACTION_QUERY)
-                                log_info("Not querying '%s' (PID %u), lacking privileges.", message, pid);
-
-                        r = 0;
-                        goto finish;
-                }
-
-                if (arg_plymouth) {
-                        char **passwords = NULL;
-
-                        if ((r = ask_password_plymouth(message, not_after, filename, accept_cached, &passwords)) >= 0) {
-                                char **p;
-
-                                packet_length = 1;
-                                STRV_FOREACH(p, passwords)
-                                        packet_length += strlen(*p) + 1;
-
-                                if (!(packet = new(char, packet_length)))
-                                        r = -ENOMEM;
-                                else {
-                                        char *d;
-
-                                        packet[0] = '+';
-                                        d = packet+1;
-
-                                        STRV_FOREACH(p, passwords)
-                                                d = stpcpy(d, *p) + 1;
-                                }
-                        }
-
-                } else {
-                        int tty_fd = -1;
-                        char *password;
-
-                        if (arg_console)
-                                if ((tty_fd = acquire_terminal("/dev/console", false, false, false, (usec_t) -1)) < 0) {
-                                        r = tty_fd;
-                                        goto finish;
-                                }
-
-                        r = ask_password_tty(message, not_after, filename, &password);
-
-                        if (arg_console) {
-                                close_nointr_nofail(tty_fd);
-                                release_terminal();
-                        }
-
-                        if (r >= 0) {
-                                packet_length = 1+strlen(password)+1;
-                                if (!(packet = new(char, packet_length)))
-                                        r = -ENOMEM;
-                                else {
-                                        packet[0] = '+';
-                                        strcpy(packet+1, password);
-                                }
-
-                                free(password);
-                        }
-                }
-
-                if (r == -ETIME || r == -ENOENT) {
-                        /* If the query went away, that's OK */
-                        r = 0;
-                        goto finish;
-                }
-
-                if (r < 0) {
-                        log_error("Failed to query password: %s", strerror(-r));
-                        goto finish;
-                }
-
-                if ((socket_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
-                        log_error("socket(): %m");
-                        r = -errno;
-                        goto finish;
-                }
-
-                zero(sa);
-                sa.un.sun_family = AF_UNIX;
-                strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
-
-                if (sendto(socket_fd, packet, packet_length, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0) {
-                        log_error("Failed to send: %m");
-                        r = -errno;
-                        goto finish;
-                }
-        }
-
-finish:
-        fclose(f);
-
-        if (socket_fd >= 0)
-                close_nointr_nofail(socket_fd);
-
-        free(packet);
-        free(socket_name);
-        free(message);
-
-        return r;
-}
-
-static int wall_tty_block(void) {
-        char *p;
-        int fd, r;
-        dev_t devnr;
-
-        r = get_ctty_devnr(0, &devnr);
-        if (r < 0)
-                return -r;
-
-        if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(devnr), minor(devnr)) < 0)
-                return -ENOMEM;
-
-        mkdir_parents_label(p, 0700);
-        mkfifo(p, 0600);
-
-        fd = open(p, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
-        free(p);
-
-        if (fd < 0)
-                return -errno;
-
-        return fd;
-}
-
-static bool wall_tty_match(const char *path) {
-        int fd, k;
-        char *p;
-        struct stat st;
-
-        if (path_is_absolute(path))
-                k = lstat(path, &st);
-        else {
-                if (asprintf(&p, "/dev/%s", path) < 0)
-                        return true;
-
-                k = lstat(p, &st);
-                free(p);
-        }
-
-        if (k < 0)
-                return true;
-
-        if (!S_ISCHR(st.st_mode))
-                return true;
-
-        /* We use named pipes to ensure that wall messages suggesting
-         * password entry are not printed over password prompts
-         * already shown. We use the fact here that opening a pipe in
-         * non-blocking mode for write-only will succeed only if
-         * there's some writer behind it. Using pipes has the
-         * advantage that the block will automatically go away if the
-         * process dies. */
-
-        if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(st.st_rdev), minor(st.st_rdev)) < 0)
-                return true;
-
-        fd = open(p, O_WRONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
-        free(p);
-
-        if (fd < 0)
-                return true;
-
-        /* What, we managed to open the pipe? Then this tty is filtered. */
-        close_nointr_nofail(fd);
-        return false;
-}
-
-static int show_passwords(void) {
-        DIR *d;
-        struct dirent *de;
-        int r = 0;
-
-        if (!(d = opendir("/run/systemd/ask-password"))) {
-                if (errno == ENOENT)
-                        return 0;
-
-                log_error("opendir(): %m");
-                return -errno;
-        }
-
-        while ((de = readdir(d))) {
-                char *p;
-                int q;
-                char *wall;
-
-                /* We only support /dev on tmpfs, hence we can rely on
-                 * d_type to be reliable */
-
-                if (de->d_type != DT_REG)
-                        continue;
-
-                if (ignore_file(de->d_name))
-                        continue;
-
-                if (!startswith(de->d_name, "ask."))
-                        continue;
-
-                if (!(p = strappend("/run/systemd/ask-password/", de->d_name))) {
-                        r = log_oom();
-                        goto finish;
-                }
-
-                wall = NULL;
-                if ((q = parse_password(p, &wall)) < 0)
-                        r = q;
-
-                free(p);
-
-                if (wall) {
-                        utmp_wall(wall, wall_tty_match);
-                        free(wall);
-                }
-        }
-
-finish:
-        if (d)
-                closedir(d);
-
-        return r;
-}
-
-static int watch_passwords(void) {
-        enum {
-                FD_INOTIFY,
-                FD_SIGNAL,
-                _FD_MAX
-        };
-
-        int notify = -1, signal_fd = -1, tty_block_fd = -1;
-        struct pollfd pollfd[_FD_MAX];
-        sigset_t mask;
-        int r;
-
-        tty_block_fd = wall_tty_block();
-
-        mkdir_p_label("/run/systemd/ask-password", 0755);
-
-        if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        if (inotify_add_watch(notify, "/run/systemd/ask-password", IN_CLOSE_WRITE|IN_MOVED_TO) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        assert_se(sigemptyset(&mask) == 0);
-        sigset_add_many(&mask, SIGINT, SIGTERM, -1);
-        assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
-
-        if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) {
-                log_error("signalfd(): %m");
-                r = -errno;
-                goto finish;
-        }
-
-        zero(pollfd);
-        pollfd[FD_INOTIFY].fd = notify;
-        pollfd[FD_INOTIFY].events = POLLIN;
-        pollfd[FD_SIGNAL].fd = signal_fd;
-        pollfd[FD_SIGNAL].events = POLLIN;
-
-        for (;;) {
-                if ((r = show_passwords()) < 0)
-                        log_error("Failed to show password: %s", strerror(-r));
-
-                if (poll(pollfd, _FD_MAX, -1) < 0) {
-
-                        if (errno == EINTR)
-                                continue;
-
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (pollfd[FD_INOTIFY].revents != 0)
-                        flush_fd(notify);
-
-                if (pollfd[FD_SIGNAL].revents != 0)
-                        break;
-        }
-
-        r = 0;
-
-finish:
-        if (notify >= 0)
-                close_nointr_nofail(notify);
-
-        if (signal_fd >= 0)
-                close_nointr_nofail(signal_fd);
-
-        if (tty_block_fd >= 0)
-                close_nointr_nofail(tty_block_fd);
-
-        return r;
-}
-
-static int help(void) {
-
-        printf("%s [OPTIONS...]\n\n"
-               "Process system password requests.\n\n"
-               "  -h --help     Show this help\n"
-               "     --version  Show package version\n"
-               "     --list     Show pending password requests\n"
-               "     --query    Process pending password requests\n"
-               "     --watch    Continuously process password requests\n"
-               "     --wall     Continuously forward password requests to wall\n"
-               "     --plymouth Ask question with Plymouth instead of on TTY\n"
-               "     --console  Ask question on /dev/console instead of current TTY\n",
-               program_invocation_short_name);
-
-        return 0;
-}
-
-static int parse_argv(int argc, char *argv[]) {
-
-        enum {
-                ARG_LIST = 0x100,
-                ARG_QUERY,
-                ARG_WATCH,
-                ARG_WALL,
-                ARG_PLYMOUTH,
-                ARG_CONSOLE,
-                ARG_VERSION
-        };
-
-        static const struct option options[] = {
-                { "help",     no_argument, NULL, 'h'          },
-                { "version",  no_argument, NULL, ARG_VERSION  },
-                { "list",     no_argument, NULL, ARG_LIST     },
-                { "query",    no_argument, NULL, ARG_QUERY    },
-                { "watch",    no_argument, NULL, ARG_WATCH    },
-                { "wall",     no_argument, NULL, ARG_WALL     },
-                { "plymouth", no_argument, NULL, ARG_PLYMOUTH },
-                { "console",  no_argument, NULL, ARG_CONSOLE  },
-                { NULL,    0,           NULL, 0               }
-        };
-
-        int c;
-
-        assert(argc >= 0);
-        assert(argv);
-
-        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
-
-                switch (c) {
-
-                case 'h':
-                        help();
-                        return 0;
-
-                case ARG_VERSION:
-                        puts(PACKAGE_STRING);
-                        puts(DISTRIBUTION);
-                        puts(SYSTEMD_FEATURES);
-                        return 0;
-
-                case ARG_LIST:
-                        arg_action = ACTION_LIST;
-                        break;
-
-                case ARG_QUERY:
-                        arg_action = ACTION_QUERY;
-                        break;
-
-                case ARG_WATCH:
-                        arg_action = ACTION_WATCH;
-                        break;
-
-                case ARG_WALL:
-                        arg_action = ACTION_WALL;
-                        break;
-
-                case ARG_PLYMOUTH:
-                        arg_plymouth = true;
-                        break;
-
-                case ARG_CONSOLE:
-                        arg_console = true;
-                        break;
-
-                case '?':
-                        return -EINVAL;
-
-                default:
-                        log_error("Unknown option code %c", c);
-                        return -EINVAL;
-                }
-        }
-
-        if (optind != argc) {
-                help();
-                return -EINVAL;
-        }
-
-        return 1;
-}
-
-int main(int argc, char *argv[]) {
-        int r;
-
-        log_set_target(LOG_TARGET_AUTO);
-        log_parse_environment();
-        log_open();
-
-        umask(0022);
-
-        if ((r = parse_argv(argc, argv)) <= 0)
-                goto finish;
-
-        if (arg_console) {
-                setsid();
-                release_terminal();
-        }
-
-        if (arg_action == ACTION_WATCH ||
-            arg_action == ACTION_WALL)
-                r = watch_passwords();
-        else
-                r = show_passwords();
-
-        if (r < 0)
-                log_error("Error: %s", strerror(-r));
-
-finish:
-        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}