Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : 
       3             : #include <signal.h>
       4             : #include <stdlib.h>
       5             : #include <unistd.h>
       6             : 
       7             : #include "log.h"
       8             : #include "process-util.h"
       9             : #include "spawn-ask-password-agent.h"
      10             : #include "util.h"
      11             : 
      12             : static pid_t agent_pid = 0;
      13             : 
      14           0 : int ask_password_agent_open(void) {
      15             :         int r;
      16             : 
      17           0 :         if (agent_pid > 0)
      18           0 :                 return 0;
      19             : 
      20             :         /* We check STDIN here, not STDOUT, since this is about input,
      21             :          * not output */
      22           0 :         if (!isatty(STDIN_FILENO))
      23           0 :                 return 0;
      24             : 
      25           0 :         if (!is_main_thread())
      26           0 :                 return -EPERM;
      27             : 
      28           0 :         r = fork_agent("(sd-askpwagent)",
      29             :                        NULL, 0,
      30             :                        &agent_pid,
      31             :                        SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH,
      32             :                        SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL);
      33           0 :         if (r < 0)
      34           0 :                 return log_error_errno(r, "Failed to fork TTY ask password agent: %m");
      35             : 
      36           0 :         return 1;
      37             : }
      38             : 
      39         281 : void ask_password_agent_close(void) {
      40             : 
      41         281 :         if (agent_pid <= 0)
      42         281 :                 return;
      43             : 
      44             :         /* Inform agent that we are done */
      45           0 :         (void) kill_and_sigcont(agent_pid, SIGTERM);
      46           0 :         (void) wait_for_terminate(agent_pid, NULL);
      47           0 :         agent_pid = 0;
      48             : }