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Diffstat (limited to 'src/machine/machine-dbus.c')
-rw-r--r--src/machine/machine-dbus.c123
1 files changed, 112 insertions, 11 deletions
diff --git a/src/machine/machine-dbus.c b/src/machine/machine-dbus.c
index f6fd9cf361..7cabe0f2ff 100644
--- a/src/machine/machine-dbus.c
+++ b/src/machine/machine-dbus.c
@@ -319,14 +319,14 @@ int bus_machine_method_get_os_release(sd_bus *bus, sd_bus_message *message, void
r = namespace_open(m->leader, NULL, &mntns_fd, NULL, &root_fd);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, pair) < 0)
- return sd_bus_error_set_errno(error, -errno);
+ return -errno;
child = fork();
if (child < 0)
- return sd_bus_error_set_errno(error, -errno);
+ return -errno;
if (child == 0) {
_cleanup_close_ int fd = -1;
@@ -355,37 +355,137 @@ int bus_machine_method_get_os_release(sd_bus *bus, sd_bus_message *message, void
f = fdopen(pair[0], "re");
if (!f)
- return sd_bus_error_set_errno(error, -errno);
+ return -errno;
pair[0] = -1;
r = load_env_file_pairs(f, "/etc/os-release", NULL, &l);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
r = wait_for_terminate(child, &si);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
- return sd_bus_error_set_errno(error, EIO);
+ return -EIO;
r = sd_bus_message_new_method_return(message, &reply);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
r = sd_bus_message_open_container(reply, 'a', "{ss}");
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
STRV_FOREACH_PAIR(k, v, l) {
r = sd_bus_message_append(reply, "{ss}", *k, *v);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
}
r = sd_bus_message_close_container(reply);
if (r < 0)
- return sd_bus_error_set_errno(error, r);
+ return r;
+
+ return sd_bus_send(bus, reply, NULL);
+}
+
+int bus_machine_method_open_pty(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, rootfd = -1;
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_close_pair_ int pair[2] = { -1, -1 };
+ _cleanup_close_ int master = -1;
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(int))];
+ } control = {};
+ struct msghdr mh = {
+ .msg_control = &control,
+ .msg_controllen = sizeof(control),
+ };
+ Machine *m = userdata;
+ struct cmsghdr *cmsg;
+ siginfo_t si;
+ pid_t child;
+ int r;
+
+ assert(bus);
+ assert(message);
+ assert(m);
+
+ r = namespace_open(m->leader, &pidnsfd, &mntnsfd, NULL, &rootfd);
+ if (r < 0)
+ return r;
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0)
+ return -errno;
+
+ child = fork();
+ if (child < 0)
+ return -errno;
+
+ if (child == 0) {
+ pair[0] = safe_close(pair[0]);
+
+ r = namespace_enter(pidnsfd, mntnsfd, -1, rootfd);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ master = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (master < 0)
+ _exit(EXIT_FAILURE);
+
+ cmsg = CMSG_FIRSTHDR(&mh);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ memcpy(CMSG_DATA(cmsg), &master, sizeof(int));
+
+ mh.msg_controllen = cmsg->cmsg_len;
+
+ if (sendmsg(pair[1], &mh, MSG_NOSIGNAL) < 0)
+ _exit(EXIT_FAILURE);
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ pair[1] = safe_close(pair[1]);
+
+ r = wait_for_terminate(child, &si);
+ if (r < 0)
+ return r;
+ if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
+ return -EIO;
+
+ if (recvmsg(pair[0], &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) < 0)
+ return -errno;
+
+ for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg))
+ if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
+ int *fds;
+ unsigned n_fds;
+
+ fds = (int*) CMSG_DATA(cmsg);
+ n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
+
+ if (n_fds != 1) {
+ close_many(fds, n_fds);
+ return -EIO;
+ }
+
+ master = fds[0];
+ }
+
+ if (master < 0)
+ return -EIO;
+
+ r = sd_bus_message_new_method_return(message, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "hs", master, ptsname(master));
+ if (r < 0)
+ return r;
return sd_bus_send(bus, reply, NULL);
}
@@ -407,6 +507,7 @@ const sd_bus_vtable machine_vtable[] = {
SD_BUS_METHOD("Kill", "si", NULL, bus_machine_method_kill, SD_BUS_VTABLE_CAPABILITY(CAP_KILL)),
SD_BUS_METHOD("GetAddresses", NULL, "a(iay)", bus_machine_method_get_addresses, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetOSRelease", NULL, "a{ss}", bus_machine_method_get_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("OpenPTY", NULL, "hs", bus_machine_method_open_pty, 0),
SD_BUS_VTABLE_END
};