-/*-*- 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 "def.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) {
_cleanup_close_ int fd = -1, notify = -1;
union sockaddr_union sa = PLYMOUTH_SOCKET;
POLL_INOTIFY
};
- assert(_passphrases);
+ assert(ret);
if (flag_file) {
notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
return -errno;
r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
- if (r < 0) {
- log_error("Failed to connect to Plymouth: %m");
+ if (r < 0)
return -errno;
- }
- if (accept_cached) {
+ if (flags & ASK_PASSWORD_ACCEPT_CACHED) {
packet = strdup("c");
n = 1;
- } else if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1),
- message, &n) < 0)
+ } else if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0)
packet = NULL;
-
if (!packet)
- return log_oom();
+ return -ENOMEM;
- k = loop_write(fd, packet, n + 1, true);
- if (k != n + 1)
- return k < 0 ? (int) k : -EIO;
+ r = loop_write(fd, packet, n + 1, true);
+ if (r < 0)
+ return r;
pollfd[POLL_SOCKET].fd = fd;
pollfd[POLL_SOCKET].events = POLLIN;
y = now(CLOCK_MONOTONIC);
- if (y > until)
- return -ETIME;
+ if (y > until) {
+ r = -ETIME;
+ goto finish;
+ }
sleep_for = (int) ((until - y) / USEC_PER_MSEC);
}
- if (flag_file && access(flag_file, F_OK) < 0)
- return -errno;
+ if (flag_file && access(flag_file, F_OK) < 0) {
+ r = -errno;
+ goto finish;
+ }
- j = poll(pollfd, notify > 0 ? 2 : 1, sleep_for);
+ j = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for);
if (j < 0) {
if (errno == EINTR)
continue;
- return -errno;
- } else if (j == 0)
- return -ETIME;
+ r = -errno;
+ goto finish;
+ } else if (j == 0) {
+ r = -ETIME;
+ 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;
k = read(fd, buffer + p, sizeof(buffer) - p);
- if (k <= 0)
- return r = k < 0 ? -errno : -EIO;
+ if (k < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+
+ r = -errno;
+ goto finish;
+ } else if (k == 0) {
+ r = -EIO;
+ goto finish;
+ }
p += k;
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)
- return -ENOMEM;
+ if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
- k = loop_write(fd, packet, n+1, true);
- if (k != n + 1)
- return 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;
}
/* No password, because UI not shown */
- return -ENOENT;
+ r = -ENOENT;
+ goto finish;
} else if (buffer[0] == 2 || buffer[0] == 9) {
uint32_t size;
memcpy(&size, buffer+1, sizeof(size));
size = le32toh(size);
- if (size + 5 > sizeof(buffer))
- return -EIO;
+ if (size + 5 > sizeof(buffer)) {
+ r = -EIO;
+ goto finish;
+ }
if (p-5 < size)
continue;
l = strv_parse_nulstr(buffer + 5, size);
- if (!l)
- return -ENOMEM;
+ if (!l) {
+ r = -ENOMEM;
+ goto finish;
+ }
- *_passphrases = l;
+ *ret = l;
break;
- } else
+ } else {
/* Unknown packet */
- return -EIO;
+ r = -EIO;
+ goto finish;
+ }
}
- return 0;
+ r = 0;
+
+finish:
+ 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;
+ }
+
+ strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
+
+ 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) {
- _cleanup_free_ 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;
- bool accept_cached = false, echo = false;
const ConfigTableItem items[] = {
{ "Ask", "Socket", config_parse_string, 0, &socket_name },
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)
*wall = _wall;
} else {
- union sockaddr_union sa = {};
- size_t packet_length = 0;
- _cleanup_close_ int socket_fd = -1;
+ _cleanup_strv_free_erase_ char **passwords = NULL;
assert(arg_action == ACTION_QUERY ||
arg_action == ACTION_WATCH);
return 0;
}
- if (arg_plymouth) {
- _cleanup_strv_free_ char **passwords = NULL;
-
- r = ask_password_plymouth(message, not_after, filename, accept_cached, &passwords);
- if (r >= 0) {
- char **p;
-
- packet_length = 1;
- STRV_FOREACH(p, passwords)
- packet_length += strlen(*p) + 1;
-
- packet = new(char, packet_length);
- if (!packet)
- r = -ENOMEM;
- else {
- char *d = packet + 1;
-
- STRV_FOREACH(p, passwords)
- d = stpcpy(d, *p) + 1;
-
- packet[0] = '+';
- }
- }
-
- } else {
+ 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;
- _cleanup_free_ char *password = NULL;
if (arg_console) {
tty_fd = acquire_terminal("/dev/console", false, false, false, USEC_INFINITY);
if (tty_fd < 0)
- return tty_fd;
+ return log_error_errno(tty_fd, "Failed to acquire /dev/console: %m");
+
+ r = reset_terminal_fd(tty_fd, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to reset terminal, ignoring: %m");
}
- r = ask_password_tty(message, not_after, echo, filename, &password);
+ r = ask_password_tty(message, NULL, not_after, echo ? ASK_PASSWORD_ECHO : 0, filename, &password);
if (arg_console) {
- safe_close(tty_fd);
+ tty_fd = safe_close(tty_fd);
release_terminal();
}
- if (r >= 0) {
- packet_length = 1 + strlen(password) + 1;
- packet = new(char, packet_length);
- if (!packet)
- r = -ENOMEM;
- else {
- packet[0] = '+';
- strcpy(packet + 1, password);
- }
- }
+ if (r >= 0)
+ r = strv_push(&passwords, password);
+
+ if (r < 0)
+ string_free_erase(password);
}
+ /* If the query went away, that's OK */
if (IN_SET(r, -ETIME, -ENOENT))
- /* If the query went away, that's OK */
return 0;
if (r < 0)
return log_error_errno(r, "Failed to query password: %m");
- socket_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (socket_fd < 0) {
- log_error("socket(): %m");
- return -errno;
- }
-
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
-
- r = sendto(socket_fd, packet, packet_length, MSG_NOSIGNAL, &sa.sa,
- offsetof(struct sockaddr_un, sun_path) + strlen(socket_name));
- if (r < 0) {
- log_error("Failed to send: %m");
- return r;
- }
+ r = send_passwords(socket_name, passwords);
+ if (r < 0)
+ return log_error_errno(r, "Failed to send: %m");
}
return 0;
static int wall_tty_block(void) {
_cleanup_free_ char *p = NULL;
- int fd, r;
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);
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, r;
- struct stat st;
+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))
- path = strappenda("/dev/", path);
+ path = strjoina("/dev/", path);
- r = lstat(path, &st);
- if (r < 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);
- 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. */
- safe_close(fd);
- return false;
+ return 0;
}
static int show_passwords(void) {
if (errno == ENOENT)
return 0;
- log_error("opendir(/run/systemd/ask-password): %m");
- return -errno;
+ return log_error_errno(errno, "Failed to open /run/systemd/ask-password: %m");
}
- while ((de = readdir(d))) {
+ FOREACH_DIRENT_ALL(de, d, return log_error_errno(errno, "Failed to read directory: %m")) {
_cleanup_free_ char *p = NULL, *wall = NULL;
int q;
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."))
r = q;
if (wall)
- utmp_wall(wall, NULL, wall_tty_match);
+ (void) utmp_wall(wall, NULL, NULL, wall_tty_match, NULL);
}
return r;
tty_block_fd = wall_tty_block();
- mkdir_p_label("/run/systemd/ask-password", 0755);
+ (void) mkdir_p_label("/run/systemd/ask-password", 0755);
notify = inotify_init1(IN_CLOEXEC);
if (notify < 0)
- return -errno;
+ 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)
- return -errno;
+ 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);
signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
if (signal_fd < 0)
- return -errno;
+ return log_error_errno(errno, "Failed to allocate signal file descriptor: %m");
pollfd[FD_INOTIFY].fd = notify;
pollfd[FD_INOTIFY].events = POLLIN;
}
if (pollfd[FD_INOTIFY].revents != 0)
- flush_fd(notify);
+ (void) flush_fd(notify);
if (pollfd[FD_SIGNAL].revents != 0)
break;
return 0;
case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
+ return version();
case ARG_LIST:
arg_action = ACTION_LIST;
goto finish;
if (arg_console) {
- setsid();
- release_terminal();
+ (void) setsid();
+ (void) release_terminal();
}
if (IN_SET(arg_action, ACTION_WATCH, ACTION_WALL))
else
r = show_passwords();
- if (r < 0)
- log_error_errno(r, "Error: %m");
-
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
projects / thirdparty / systemd.git / blobdiff