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Viewing changes to dracut-module/password-agent.c

  • Committer: Teddy Hogeborn
  • Date: 2019-08-05 14:31:51 UTC
  • Revision ID: teddy@recompile.se-20190805143151-lt5d97wqif3t8250
Client: Debian package fix: Make uninstall when using dracut(8) work

Use the same logic to rebuild the initramfs image when uninstalling as
when installing the package.

* debian/mandos-client.postrm (update_initramfs): Use the same logic
  as the update_initramfs function in debian/mandos-client.postinst.

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Lines of Context:
dracut-module/password-agent.c
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#include <sysexits.h>           /* EX_USAGE, EX_OSERR, EX_OSFILE */
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#include <errno.h>              /* errno, error_t, EACCES,
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                                   ENAMETOOLONG, ENOENT, ENOTDIR,
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                                   ENOMEM, EEXIST, ECHILD, EPERM,
 
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                                   EEXIST, ECHILD, EPERM, ENOMEM,
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                                   EAGAIN, EINTR, ENOBUFS, EADDRINUSE,
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                                   ECONNREFUSED, ECONNRESET,
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                                   ETOOMANYREFS, EMSGSIZE, EBADF,
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                                   ARGP_ERR_UNKNOWN, ARGP_KEY_ARGS,
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                                   struct argp, argp_parse(),
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                                   ARGP_NO_EXIT */
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#include <stdint.h>             /* SIZE_MAX */
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#include <unistd.h>             /* uid_t, gid_t, close(), pipe2(),
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                                   fork(), _exit(), dup2(),
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                                   STDOUT_FILENO, setresgid(),
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                                   IN_EXCL_UNLINK, IN_ONLYDIR,
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                                   struct inotify_event */
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#include <fnmatch.h>            /* fnmatch(), FNM_FILE_NAME */
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#include <stdio.h>              /* asprintf(), FILE, stderr, fopen(),
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                                   fclose(), getline(), sscanf(),
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                                   feof(), ferror(), rename(),
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                                   fdopen(), fprintf(), fscanf() */
 
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#include <stdio.h>              /* asprintf(), FILE, fopen(),
 
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                                   getline(), sscanf(), feof(),
 
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                                   ferror(), fclose(), stderr,
 
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                                   rename(), fdopen(), fprintf(),
 
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                                   fscanf() */
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#include <glib.h>    /* GKeyFile, g_key_file_free(), g_key_file_new(),
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                        GError, g_key_file_load_from_file(),
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                        G_KEY_FILE_NONE, TRUE, G_FILE_ERROR_NOENT,
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  mono_microsecs next_run;
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} __attribute__((designated_init)) task_queue;
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/* "task_func" - A function type for task functions
 
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/* "func_type" - A function type for task functions
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   I.e. functions for the code which runs when a task is run, all have
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   this type */
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__attribute__((nonnull, warn_unused_result))
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bool add_to_queue(task_queue *const queue, const task_context task){
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  if((queue->length + 1) > (SIZE_MAX / sizeof(task_context))){
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    /* overflow */
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    error(0, ENOMEM, "Failed to allocate %" PRIuMAX
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          " tasks for queue->tasks", (uintmax_t)(queue->length + 1));
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    errno = ENOMEM;
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    return false;
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  }
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  const size_t needed_size = sizeof(task_context)*(queue->length + 1);
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  if(needed_size > (queue->allocated)){
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    task_context *const new_tasks = realloc(queue->tasks,
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  }
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  close(pipefds[1]);
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  if(pid == -1){
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    error(0, errno, "Failed to fork()");
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    close(pipefds[0]);
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    return false;
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  }
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  if(not add_to_queue(queue, (task_context){
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        .func=wait_for_mandos_client_exit,
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        .pid=pid,
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  g_assert_true(queue->tasks[0].func == dummy_func);
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}
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1900
 
static void test_add_to_queue_overflow(__attribute__((unused))
1901
 
                                       test_fixture *fixture,
1902
 
                                       __attribute__((unused))
1903
 
                                       gconstpointer user_data){
1904
 
  __attribute__((cleanup(cleanup_queue)))
1905
 
    task_queue *queue = create_queue();
1906
 
  g_assert_nonnull(queue);
1907
 
  g_assert_true(queue->length == 0);
1908
 
  queue->length = SIZE_MAX / sizeof(task_context); /* fake max size */
1909
 
 
1910
 
  FILE *real_stderr = stderr;
1911
 
  FILE *devnull = fopen("/dev/null", "we");
1912
 
  g_assert_nonnull(devnull);
1913
 
  stderr = devnull;
1914
 
  const bool ret = add_to_queue(queue,
1915
 
                                (task_context){ .func=dummy_func });
1916
 
  g_assert_true(errno == ENOMEM);
1917
 
  g_assert_false(ret);
1918
 
  stderr = real_stderr;
1919
 
  g_assert_cmpint(fclose(devnull), ==, 0);
1920
 
  queue->length = 0;            /* Restore real size */
1921
 
}
1922
 
 
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static void dummy_func(__attribute__((unused))
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                       const task_context task,
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                       __attribute__((unused))
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    }
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    exit(EXIT_SUCCESS);
2198
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  }
2199
 
  if(pid == -1){
2200
 
    error(EXIT_FAILURE, errno, "Failed to fork()");
2201
 
  }
2202
 
 
2203
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  int status;
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  waitpid(pid, &status, 0);
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  if(WIFEXITED(status) and (WEXITSTATUS(status) == EXIT_SUCCESS)){
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                                           test_fixture *fixture,
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                                           __attribute__((unused))
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                                           gconstpointer user_data){
5961
 
#ifndef __amd64__
5962
 
  g_test_skip("Skipping EMSGSIZE test on non-AMD64 platform");
5963
 
#else
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  __attribute__((cleanup(cleanup_close)))
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    const int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
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  g_assert_cmpint(epoll_fd, >=, 0);
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  g_assert_cmpuint((unsigned int)queue->length, ==, 0);
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  g_assert_true(string_set_contains(cancelled_filenames,
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                                    question_filename));
6022
 
#endif
6023
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}
6024
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static void test_send_password_to_socket_retry(__attribute__((unused))
7906
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  test_add("/parse_arguments/mixed", test_parse_arguments_mixed);
7907
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  test_add("/queue/create", test_create_queue);
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  test_add("/queue/add", test_add_to_queue);
7909
 
  test_add("/queue/add/overflow", test_add_to_queue_overflow);
7910
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  test_add("/queue/has_question/empty",
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           test_queue_has_question_empty);
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  test_add("/queue/has_question/false",
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  g_option_context_set_help_enabled(context, FALSE);
8138
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  g_option_context_set_ignore_unknown_options(context, TRUE);
8139
8094
 
8140
 
  gboolean should_run_tests = FALSE;
 
8095
  gboolean run_tests = FALSE;
8141
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  GOptionEntry entries[] = {
8142
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    { "test", 0, 0, G_OPTION_ARG_NONE,
8143
 
      &should_run_tests, "Run tests", NULL },
 
8098
      &run_tests, "Run tests", NULL },
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    { NULL }
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  };
8146
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  g_option_context_add_main_entries(context, entries, NULL);
8153
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  }
8154
8109
 
8155
8110
  g_option_context_free(context);
8156
 
  return should_run_tests != FALSE;
 
8111
  return run_tests != FALSE;
8157
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}