diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/journal/journalctl.c | 53 |
1 files changed, 50 insertions, 3 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index d6fa81061c..ae62170ae5 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -2117,9 +2117,56 @@ int main(int argc, char *argv[]) { r = sd_journal_open_files_fd(&j, &ifd, 1, 0); } else if (arg_file) r = sd_journal_open_files(&j, (const char**) arg_file, 0); - else if (arg_machine) - r = sd_journal_open_container(&j, arg_machine, 0); - else + else if (arg_machine) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int fd; + + if (geteuid() != 0) { + /* The file descriptor returned by OpenMachineRootDirectory() will be owned by users/groups of + * the container, thus we need root privileges to override them. */ + log_error("Using the --machine= switch requires root privileges."); + r = -EPERM; + goto finish; + } + + r = sd_bus_open_system(&bus); + if (r < 0) { + log_error_errno(r, "Failed to open system bus: %m"); + goto finish; + } + + r = sd_bus_call_method( + bus, + "org.freedesktop.machine1", + "/org/freedesktop/machine1", + "org.freedesktop.machine1.Manager", + "OpenMachineRootDirectory", + &error, + &reply, + "s", arg_machine); + if (r < 0) { + log_error_errno(r, "Failed to open root directory: %s", bus_error_message(&error, r)); + goto finish; + } + + r = sd_bus_message_read(reply, "h", &fd); + if (r < 0) { + bus_log_parse_error(r); + goto finish; + } + + fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); + if (fd < 0) { + r = log_error_errno(errno, "Failed to duplicate file descriptor: %m"); + goto finish; + } + + r = sd_journal_open_directory_fd(&j, fd, SD_JOURNAL_OS_ROOT); + if (r < 0) + safe_close(fd); + } else r = sd_journal_open(&j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type); if (r < 0) { log_error_errno(r, "Failed to open %s: %m", arg_directory ?: arg_file ? "files" : "journal"); |