-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <stdbool.h>
#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <poll.h>
+#include <stdbool.h>
+#include <stddef.h>
#include <string.h>
+#include <sys/inotify.h>
+#include <sys/signalfd.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 "alloc-util.h"
+#include "ask-password-api.h"
+#include "conf-parser.h"
+#include "def.h"
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "io-util.h"
#include "mkdir.h"
#include "path-util.h"
-#include "conf-parser.h"
-#include "utmp-wtmp.h"
+#include "process-util.h"
+#include "signal-util.h"
#include "socket-util.h"
-#include "ask-password-api.h"
+#include "string-util.h"
#include "strv.h"
-#include "build.h"
+#include "terminal-util.h"
+#include "util.h"
+#include "utmp-wtmp.h"
static enum {
ACTION_LIST,
static int ask_password_plymouth(
const char *message,
usec_t until,
+ AskPasswordFlags flags,
const char *flag_file,
- bool accept_cached,
- char ***_passphrases) {
+ char ***ret) {
- int fd = -1, notify = -1;
- union sockaddr_union sa = {};
- char *packet = NULL;
+ _cleanup_close_ int fd = -1, notify = -1;
+ union sockaddr_union sa = PLYMOUTH_SOCKET;
+ _cleanup_free_ char *packet = NULL;
ssize_t k;
int r, n;
struct pollfd pollfd[2] = {};
POLL_INOTIFY
};
- assert(_passphrases);
+ assert(ret);
if (flag_file) {
- if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
- r = -errno;
- goto finish;
- }
+ notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
+ if (notify < 0)
+ return -errno;
- if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) {
- r = -errno;
- goto finish;
- }
+ r = inotify_add_watch(notify, flag_file, IN_ATTRIB); /* for the link count */
+ if (r < 0)
+ return -errno;
}
- if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
- r = -errno;
- goto finish;
- }
+ fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (fd < 0)
+ return -errno;
- 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;
- }
+ r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
+ if (r < 0)
+ return -errno;
- if (accept_cached) {
+ if (flags & ASK_PASSWORD_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;
- }
+ } else if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0)
+ packet = NULL;
+ if (!packet)
+ return -ENOMEM;
- if ((k = loop_write(fd, packet, n+1, true)) != n+1) {
- r = k < 0 ? (int) k : -EIO;
- goto finish;
- }
+ r = loop_write(fd, packet, n + 1, true);
+ if (r < 0)
+ return r;
pollfd[POLL_SOCKET].fd = fd;
pollfd[POLL_SOCKET].events = POLLIN;
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 (flag_file && access(flag_file, F_OK) < 0) {
+ r = -errno;
+ goto finish;
+ }
+ j = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for);
+ if (j < 0) {
if (errno == EINTR)
continue;
goto finish;
}
- if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0)
+ 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;
+ k = read(fd, buffer + p, sizeof(buffer) - p);
+ if (k < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+
+ r = -errno;
+ goto finish;
+ } else if (k == 0) {
+ r = -EIO;
goto finish;
}
if (buffer[0] == 5) {
- if (accept_cached) {
+ if (flags & ASK_PASSWORD_ACCEPT_CACHED) {
/* Hmm, first try with cached
* passwords failed, so let's retry
* with a normal password request */
- free(packet);
- packet = NULL;
+ packet = mfree(packet);
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;
+ r = loop_write(fd, packet, n+1, true);
+ if (r < 0)
goto finish;
- }
- accept_cached = false;
+ flags &= ~ASK_PASSWORD_ACCEPT_CACHED;
p = 0;
continue;
}
uint32_t size;
char **l;
- /* One ore more answers */
+ /* One or more answers */
if (p < 5)
continue;
memcpy(&size, buffer+1, sizeof(size));
size = le32toh(size);
- if (size+5 > sizeof(buffer)) {
+ if (size + 5 > sizeof(buffer)) {
r = -EIO;
goto finish;
}
if (p-5 < size)
continue;
- if (!(l = strv_parse_nulstr(buffer + 5, size))) {
+ l = strv_parse_nulstr(buffer + 5, size);
+ if (!l) {
r = -ENOMEM;
goto finish;
}
- *_passphrases = l;
+ *ret = l;
break;
} else {
r = 0;
finish:
- if (notify >= 0)
- close_nointr_nofail(notify);
+ memory_erase(buffer, sizeof(buffer));
+ return r;
+}
+
+static int send_passwords(const char *socket_name, char **passwords) {
+ _cleanup_free_ char *packet = NULL;
+ _cleanup_close_ int socket_fd = -1;
+ union sockaddr_union sa = { .un.sun_family = AF_UNIX };
+ size_t packet_length = 1;
+ char **p, *d;
+ int r;
+
+ assert(socket_name);
+
+ STRV_FOREACH(p, passwords)
+ packet_length += strlen(*p) + 1;
+
+ packet = new(char, packet_length);
+ if (!packet)
+ return -ENOMEM;
+
+ packet[0] = '+';
+
+ d = packet + 1;
+ STRV_FOREACH(p, passwords)
+ d = stpcpy(d, *p) + 1;
+
+ socket_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (socket_fd < 0) {
+ r = log_debug_errno(errno, "socket(): %m");
+ goto finish;
+ }
- if (fd >= 0)
- close_nointr_nofail(fd);
+ strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
- free(packet);
+ r = sendto(socket_fd, packet, packet_length, MSG_NOSIGNAL, &sa.sa,
+ offsetof(struct sockaddr_un, sun_path) + strlen(socket_name));
+ if (r < 0)
+ r = log_debug_errno(errno, "sendto(): %m");
+finish:
+ memory_erase(packet, packet_length);
return r;
}
static int parse_password(const char *filename, char **wall) {
- char *socket_name = NULL, *message = NULL, *packet = NULL;
+ _cleanup_free_ char *socket_name = NULL, *message = NULL;
+ bool accept_cached = false, echo = false;
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", "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 }
+ { "Ask", "Echo", config_parse_bool, 0, &echo },
+ {}
};
- 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(NULL, filename, f, NULL, config_item_table_lookup, (void*) items, true, false, NULL);
- if (r < 0) {
- log_error("Failed to parse password file %s: %s", filename, strerror(-r));
- goto finish;
- }
+ r = config_parse(NULL, filename, NULL,
+ NULL,
+ config_item_table_lookup, items,
+ true, false, true, NULL);
+ if (r < 0)
+ return r;
if (!socket_name) {
log_error("Invalid password file %s", filename);
- r = -EBADMSG;
- goto finish;
+ return -EBADMSG;
}
- if (not_after > 0) {
- if (now(CLOCK_MONOTONIC) > not_after) {
- r = 0;
- goto finish;
- }
- }
+ if (not_after > 0 && now(CLOCK_MONOTONIC) > not_after)
+ return 0;
- if (pid > 0 && !pid_is_alive(pid)) {
- r = 0;
- goto finish;
- }
+ if (pid > 0 && !pid_is_alive(pid))
+ return 0;
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 : "",
+ strempty(*wall),
*wall ? "\r\n\r\n" : "",
message,
- pid) < 0) {
- r = log_oom();
- goto finish;
- }
+ pid) < 0)
+ return log_oom();
free(*wall);
*wall = _wall;
+
} else {
- union {
- struct sockaddr sa;
- struct sockaddr_un un;
- } sa = {};
- size_t packet_length = 0;
+ _cleanup_strv_free_erase_ char **passwords = NULL;
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;
+ return 0;
}
- if (arg_plymouth) {
- _cleanup_strv_free_ 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;
+ if (arg_plymouth)
+ r = ask_password_plymouth(message, not_after, accept_cached ? ASK_PASSWORD_ACCEPT_CACHED : 0, filename, &passwords);
+ else {
+ char *password = NULL;
+ int tty_fd = -1;
- packet[0] = '+';
- d = packet+1;
+ if (arg_console) {
+ tty_fd = acquire_terminal("/dev/console", false, false, false, USEC_INFINITY);
+ if (tty_fd < 0)
+ return log_error_errno(tty_fd, "Failed to acquire /dev/console: %m");
- STRV_FOREACH(p, passwords)
- d = stpcpy(d, *p) + 1;
- }
+ r = reset_terminal_fd(tty_fd, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to reset terminal, ignoring: %m");
}
- } else {
- int tty_fd = -1;
- char *password = NULL;
-
- 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);
+ r = ask_password_tty(message, NULL, not_after, echo ? ASK_PASSWORD_ECHO : 0, filename, &password);
if (arg_console) {
- close_nointr_nofail(tty_fd);
+ tty_fd = safe_close(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);
- }
+ if (r >= 0)
+ r = strv_push(&passwords, password);
- free(password);
- }
+ if (r < 0)
+ string_free_erase(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;
- }
+ /* If the query went away, that's OK */
+ if (IN_SET(r, -ETIME, -ENOENT))
+ return 0;
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
+ if (r < 0)
+ return log_error_errno(r, "Failed to query password: %m");
- 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;
- }
+ r = send_passwords(socket_name, passwords);
+ if (r < 0)
+ return log_error_errno(r, "Failed to send: %m");
}
-finish:
- fclose(f);
-
- if (socket_fd >= 0)
- close_nointr_nofail(socket_fd);
-
- free(packet);
- free(socket_name);
- free(message);
-
- return r;
+ return 0;
}
static int wall_tty_block(void) {
- char *p;
- int fd, r;
+ _cleanup_free_ char *p = NULL;
dev_t devnr;
+ int fd, r;
r = get_ctty_devnr(0, &devnr);
+ if (r == -ENXIO) /* We have no controlling tty */
+ return -ENOTTY;
if (r < 0)
- return -r;
+ return log_error_errno(r, "Failed to get controlling TTY: %m");
if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(devnr), minor(devnr)) < 0)
- return -ENOMEM;
+ return log_oom();
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 log_debug_errno(errno, "Failed to open %s: %m", p);
return fd;
}
-static bool wall_tty_match(const char *path) {
- int fd, k;
- char *p;
+static bool wall_tty_match(const char *path, void *userdata) {
+ _cleanup_free_ char *p = NULL;
+ _cleanup_close_ int fd = -1;
struct stat st;
- if (path_is_absolute(path))
- k = lstat(path, &st);
- else {
- if (asprintf(&p, "/dev/%s", path) < 0)
- return true;
+ if (!path_is_absolute(path))
+ path = strjoina("/dev/", path);
- k = lstat(p, &st);
- free(p);
- }
-
- if (k < 0)
+ if (lstat(path, &st) < 0) {
+ log_debug_errno(errno, "Failed to stat %s: %m", path);
return true;
+ }
- if (!S_ISCHR(st.st_mode))
+ if (!S_ISCHR(st.st_mode)) {
+ log_debug("%s is not a character device.", path);
return true;
+ }
/* We use named pipes to ensure that wall messages suggesting
* password entry are not printed over password prompts
* 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)
+ if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(st.st_rdev), minor(st.st_rdev)) < 0) {
+ log_oom();
return true;
+ }
fd = open(p, O_WRONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
- free(p);
-
- if (fd < 0)
- return true;
+ if (fd < 0) {
+ log_debug_errno(errno, "Failed top open the wall pipe: %m");
+ return 1;
+ }
/* What, we managed to open the pipe? Then this tty is filtered. */
- close_nointr_nofail(fd);
- return false;
+ return 0;
}
static int show_passwords(void) {
- DIR *d;
+ _cleanup_closedir_ DIR *d;
struct dirent *de;
int r = 0;
- if (!(d = opendir("/run/systemd/ask-password"))) {
+ d = opendir("/run/systemd/ask-password");
+ if (!d) {
if (errno == ENOENT)
return 0;
- log_error("opendir(): %m");
- return -errno;
+ return log_error_errno(errno, "Failed to open /run/systemd/ask-password: %m");
}
- while ((de = readdir(d))) {
- char *p;
+ FOREACH_DIRENT_ALL(de, d, return log_error_errno(errno, "Failed to read directory: %m")) {
+ _cleanup_free_ char *p = NULL, *wall = NULL;
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))
+ if (hidden_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;
- }
+ p = strappend("/run/systemd/ask-password/", de->d_name);
+ if (!p)
+ return log_oom();
- wall = NULL;
- if ((q = parse_password(p, &wall)) < 0)
+ q = parse_password(p, &wall);
+ if (q < 0 && r == 0)
r = q;
- free(p);
-
- if (wall) {
- utmp_wall(wall, NULL, wall_tty_match);
- free(wall);
- }
+ if (wall)
+ (void) utmp_wall(wall, NULL, NULL, wall_tty_match, NULL);
}
-finish:
- if (d)
- closedir(d);
-
return r;
}
_FD_MAX
};
- int notify = -1, signal_fd = -1, tty_block_fd = -1;
+ _cleanup_close_ 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);
+ (void) mkdir_p_label("/run/systemd/ask-password", 0755);
- if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
- r = -errno;
- goto finish;
- }
+ notify = inotify_init1(IN_CLOEXEC);
+ if (notify < 0)
+ return log_error_errno(errno, "Failed to allocate directory watch: %m");
- if (inotify_add_watch(notify, "/run/systemd/ask-password", IN_CLOSE_WRITE|IN_MOVED_TO) < 0) {
- r = -errno;
- goto finish;
- }
+ if (inotify_add_watch(notify, "/run/systemd/ask-password", IN_CLOSE_WRITE|IN_MOVED_TO) < 0)
+ return log_error_errno(errno, "Failed to add /run/systemd/ask-password to directory watch: %m");
- assert_se(sigemptyset(&mask) == 0);
- sigset_add_many(&mask, SIGINT, SIGTERM, -1);
- assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
+ assert_se(sigemptyset(&mask) >= 0);
+ assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0);
+ 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;
- }
+ signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
+ if (signal_fd < 0)
+ return log_error_errno(errno, "Failed to allocate signal file descriptor: %m");
pollfd[FD_INOTIFY].fd = notify;
pollfd[FD_INOTIFY].events = POLLIN;
pollfd[FD_SIGNAL].events = POLLIN;
for (;;) {
- if ((r = show_passwords()) < 0)
- log_error("Failed to show password: %s", strerror(-r));
+ r = show_passwords();
+ if (r < 0)
+ log_error_errno(r, "Failed to show password: %m");
if (poll(pollfd, _FD_MAX, -1) < 0) {
-
if (errno == EINTR)
continue;
- r = -errno;
- goto finish;
+ return -errno;
}
if (pollfd[FD_INOTIFY].revents != 0)
- flush_fd(notify);
+ (void) 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;
+ return 0;
}
-static int help(void) {
-
+static void help(void) {
printf("%s [OPTIONS...]\n\n"
"Process system password requests.\n\n"
" -h --help Show this help\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[]) {
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
- return help();
+ help();
+ return 0;
case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
+ return version();
case ARG_LIST:
arg_action = ACTION_LIST;
default:
assert_not_reached("Unhandled option");
}
- }
if (optind != argc) {
- help();
+ log_error("%s takes no arguments.", program_invocation_short_name);
return -EINVAL;
}
umask(0022);
- if ((r = parse_argv(argc, argv)) <= 0)
+ r = parse_argv(argc, argv);
+ if (r <= 0)
goto finish;
if (arg_console) {
- setsid();
- release_terminal();
+ (void) setsid();
+ (void) release_terminal();
}
- if (arg_action == ACTION_WATCH ||
- arg_action == ACTION_WALL)
+ if (IN_SET(arg_action, ACTION_WATCH, 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;
}
projects / thirdparty / systemd.git / blobdiff