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path: root/src/tty-ask-password-agent/tty-ask-password-agent.c
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Diffstat (limited to 'src/tty-ask-password-agent/tty-ask-password-agent.c')
-rw-r--r--src/tty-ask-password-agent/tty-ask-password-agent.c109
1 files changed, 57 insertions, 52 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
index 4630eb94f1..5dbc0a9bcc 100644
--- a/src/tty-ask-password-agent/tty-ask-password-agent.c
+++ b/src/tty-ask-password-agent/tty-ask-password-agent.c
@@ -58,9 +58,9 @@ static bool arg_console = false;
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;
@@ -75,7 +75,7 @@ static int ask_password_plymouth(
POLL_INOTIFY
};
- assert(_passphrases);
+ assert(ret);
if (flag_file) {
notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
@@ -93,17 +93,15 @@ static int ask_password_plymouth(
r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
if (r < 0)
- return log_error_errno(errno, "Failed to connect to Plymouth: %m");
+ 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;
r = loop_write(fd, packet, n + 1, true);
if (r < 0)
@@ -131,7 +129,7 @@ static int ask_password_plymouth(
if (flag_file && access(flag_file, F_OK) < 0)
return -errno;
- 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;
@@ -140,15 +138,20 @@ static int ask_password_plymouth(
} else if (j == 0)
return -ETIME;
- 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;
+
+ return -errno;
+ } else if (k == 0)
+ return -EIO;
p += k;
@@ -157,7 +160,7 @@ static int ask_password_plymouth(
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 */
@@ -170,7 +173,7 @@ static int ask_password_plymouth(
if (r < 0)
return r;
- accept_cached = false;
+ flags &= ~ASK_PASSWORD_ACCEPT_CACHED;
p = 0;
continue;
}
@@ -198,7 +201,7 @@ static int ask_password_plymouth(
if (!l)
return -ENOMEM;
- *_passphrases = l;
+ *ret = l;
break;
} else
@@ -283,7 +286,7 @@ static int parse_password(const char *filename, char **wall) {
if (arg_plymouth) {
_cleanup_strv_free_ char **passwords = NULL;
- r = ask_password_plymouth(message, not_after, filename, accept_cached, &passwords);
+ r = ask_password_plymouth(message, not_after, accept_cached ? ASK_PASSWORD_ACCEPT_CACHED : 0, filename, &passwords);
if (r >= 0) {
char **p;
@@ -305,19 +308,19 @@ static int parse_password(const char *filename, char **wall) {
}
} else {
- int tty_fd = -1;
_cleanup_free_ char *password = NULL;
+ int tty_fd = -1;
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 = 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();
}
@@ -347,12 +350,9 @@ static int parse_password(const char *filename, char **wall) {
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_errno(errno, "Failed to send: %m");
- return r;
- }
+ r = sendto(socket_fd, packet, packet_length, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name));
+ if (r < 0)
+ return log_error_errno(errno, "Failed to send: %m");
}
return 0;
@@ -360,40 +360,45 @@ static int parse_password(const char *filename, char **wall) {
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_error_errno(errno, "Failed to open %s: %m", p);
return fd;
}
static bool wall_tty_match(const char *path, void *userdata) {
- int fd, r;
- struct stat st;
_cleanup_free_ char *p = NULL;
+ _cleanup_close_ int fd = -1;
+ struct stat st;
if (!path_is_absolute(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
@@ -403,16 +408,19 @@ static bool wall_tty_match(const char *path, void *userdata) {
* 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) {
@@ -425,11 +433,10 @@ static int show_passwords(void) {
if (errno == ENOENT)
return 0;
- log_error_errno(errno, "opendir(/run/systemd/ask-password): %m");
- return -errno;
+ return log_error_errno(errno, "Failed top 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;
@@ -454,7 +461,7 @@ static int show_passwords(void) {
r = q;
if (wall)
- utmp_wall(wall, NULL, NULL, wall_tty_match, NULL);
+ (void) utmp_wall(wall, NULL, NULL, wall_tty_match, NULL);
}
return r;
@@ -474,14 +481,14 @@ static int watch_passwords(void) {
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);
assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0);
@@ -489,7 +496,7 @@ static int watch_passwords(void) {
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;
@@ -509,7 +516,7 @@ static int watch_passwords(void) {
}
if (pollfd[FD_INOTIFY].revents != 0)
- flush_fd(notify);
+ (void) flush_fd(notify);
if (pollfd[FD_SIGNAL].revents != 0)
break;
@@ -633,8 +640,6 @@ int main(int argc, char *argv[]) {
r = watch_passwords();
else
r = show_passwords();
- if (r < 0)
- log_error_errno(r, "Error: %m");
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-08-29 01:13:30 +0000