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  • Committer: Teddy Hogeborn
  • Date: 2019-07-27 10:11:45 UTC
  • Revision ID: teddy@recompile.se-20190727101145-jnpbpf8220gldbcd
Add dracut(8) support

Add support for the dracut(8) system for generating initramfs image
files; dracut is an alternative to the "initramfs-tools" package.

* .bzrignore (dracut-module/password-agent): Ignore new binary file.
* dracut-module: New directory for the dracut module.
* INSTALL (Prerequisites/Libraries/Mandos Client): Add dracut as an
                                                   alternative to
                                                   initramfs-tools,
                                                   and also add GLib.
* Makefile (DRACUTMODULE, GLIB_CFLAGS, GLIB_LIBS): New.
  (CPROGS): Add "dracut-module/password-agent".
  (DOCS): Add "dracut-module/password-agent.8mandos".
  (dracut-module/password-agent.8mandos): New.
  (dracut-module/password-agent.8mandos.xhtml): - '' -
  (dracut-module/password-agent): - '' -
  (check): Add command to run tests of password-agent(8mandos).
  (install-client-nokey): Also install the dracut module directory,
                          its files, and the password-agent(8mandos)
                          manual page.
  (install-client): To update the initramfs image file, run
                    update-initramfs or dracut depending on what is
                    installed.
  (uninstall-client): - '' - and also uninstall the the files in the
                      dracut module directory, that directory itself,
                      and the password-agent(8mandos) manual page.
* debian/control (Build-Depends): Add "libglib2.0-dev (>=2.40)".
  (Package: mandos-client/Depends): Add "dracut (>= 044+241-3)" as an
                                    alternative dependency to
                                    initramfs-tools.
  (Package: mandos-client/Conflicts): New; set to
                                      "dracut-config-generic".
  (debian/mandos-client.README.Debian): Document alternative commands
                                        to update the initramfs image
                                        for when dracut is used.
* debian/mandos-client.postinst (update_initramfs): Use alternative
                                                    commands to update
                                                    the initramfs
                                                    image for when
                                                    dracut is used.
* debian/tests/control (password-agent, password-agent-suid): Add two
                                                              new tests.
* dracut-module/ask-password-mandos.path: New.
* dracut-module/ask-password-mandos.service: - '' -
* dracut-module/cmdline-mandos.sh: - '' -
* dracut-module/module-setup.sh: - '' -
* dracut-module/password-agent.c: - '' -
* dracut-module/password-agent.xml: - '' -
* initramfs-unpack: Use the dracut "skipcpio" command, if available.
                    Also be more flexible and try hard to detect where
                    compressed data starts.
* plugins.d/mandos-client.xml (SECURITY): Be more precise that the
                                          mandos-client binary might
                                          not always be setuid, but
                                          that the program assumes
                                          that it has been started
                                          that way.
* plugins.d/password-prompt.c: Add new "--prompt" option.
  (conflict_detection): First try to detect the new PID file of
                        plymouth.
  (main): Define and use new "prompt" variable.
* plugins.d/password-prompt.xml (SYNOPSIS): Show new --prompt option.
  (DESCRIPTION): Describe new behavior of looking for plymouth PID
                 file.
  (OPTIONS): Document new "--prompt" option.
  (ENVIRONMENT): Clarify that the CRYPTTAB_SOURCE and CRYPTTAB_NAME
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the CRYPTTAB_SOURCE and
                 CRYPTTAB_NAME comes from, since this can now be
                 either initramfs-tools or dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference, and add commas
              to separate the other references.
* plugins.d/plymouth.c: Add new "--prompt" and "--debug" options.
  (debug): New global flag.
  (fprintf_plus): New function, used for debug output.
  (exec_and_wait): Add extra "const" to "argv" argument.
  (main): Define and use new "prompt" variable.  Add debug output.
  (main/options, main/parse_opt): New; used to parse options.
* plugins.d/plymouth.xml (SYNOPSIS): Show new options.
  (OPTIONS): Document new options.
  (ENVIRONMENT): Clarify that the cryptsource and crypttarget
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the cryptsource and crypttarget
                 comes from, since this can now be either
                 initramfs-tools or dracut.
  (EXAMPLE): Add an example using an option.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/splashy.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/usplash.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.

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plugins.d/plymouth.c
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/*
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 * Plymouth - Read a password from Plymouth and output it
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 * 
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 * Copyright © 2010-2021 Teddy Hogeborn
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 * Copyright © 2010-2021 Björn Påhlsson
 
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 * Copyright © 2010-2019 Teddy Hogeborn
 
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 * Copyright © 2010-2019 Björn Påhlsson
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 * 
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 * This file is part of Mandos.
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 * 
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 * Contact the authors at <mandos@recompile.se>.
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 */
25
25
 
26
 
#define _GNU_SOURCE             /* program_invocation_short_name,
27
 
                                   vasprintf(), asprintf(),
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                                   TEMP_FAILURE_RETRY() */
29
 
#include <sys/types.h>          /* sig_atomic_t, pid_t, setuid(),
30
 
                                   geteuid(), setsid() */
31
 
#include <argp.h>               /* argp_program_version,
32
 
                                   argp_program_bug_address,
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                                   struct argp_option,
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                                   struct argp_state,
35
 
                                   ARGP_ERR_UNKNOWN, struct argp,
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                                   argp_parse(), ARGP_IN_ORDER */
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#include <stddef.h>             /* NULL, size_t */
 
26
#define _GNU_SOURCE             /* asprintf(), TEMP_FAILURE_RETRY() */
 
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#include <signal.h>             /* sig_atomic_t, struct sigaction,
 
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                                   sigemptyset(), sigaddset(), SIGINT,
 
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                                   SIGHUP, SIGTERM, sigaction(),
 
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                                   kill(), SIG_IGN */
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#include <stdbool.h>            /* bool, false, true */
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#include <stdio.h>              /* FILE, fprintf(), vfprintf(),
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                                   vasprintf(), stderr, asprintf(),
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                                   fopen(), fscanf(), fclose(),
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                                   sscanf() */
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#include <stdarg.h>             /* va_list, va_start(), vfprintf() */
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#include <errno.h>              /* program_invocation_short_name,
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                                   errno, ENOMEM, EINTR, ENOENT,
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                                   error_t, EINVAL */
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#include <string.h>             /* strerror(), strdup(), memcmp() */
 
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#include <fcntl.h>              /* open(), O_RDONLY */
 
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#include <iso646.h>             /* and, or, not*/
 
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#include <sys/types.h>          /* size_t, ssize_t, pid_t, struct
 
35
                                   dirent, waitpid() */
 
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#include <sys/wait.h>           /* waitpid() */
 
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#include <stddef.h>             /* NULL */
 
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#include <string.h>             /* strchr(), memcmp() */
 
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#include <stdio.h>              /* asprintf(), perror(), fopen(),
 
40
                                   fscanf(), vasprintf(), fprintf(),
 
41
                                   vfprintf() */
 
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#include <unistd.h>             /* close(), readlink(), read(),
 
43
                                   fork(), setsid(), chdir(), dup2(),
 
44
                                   STDERR_FILENO, execv(), access() */
 
45
#include <stdlib.h>             /* free(), EXIT_FAILURE, realloc(),
 
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                                   EXIT_SUCCESS, malloc(), _exit(),
 
47
                                   getenv() */
 
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#include <dirent.h>             /* scandir(), alphasort() */
 
49
#include <inttypes.h>           /* intmax_t, strtoumax(), SCNuMAX */
 
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#include <sys/stat.h>           /* struct stat, lstat() */
 
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#include <sysexits.h>           /* EX_OSERR, EX_UNAVAILABLE */
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#include <error.h>              /* error() */
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#include <stdlib.h>             /* free(), getenv(), malloc(),
50
 
                                   reallocarray(), realloc(),
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                                   EXIT_FAILURE, EXIT_SUCCESS */
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#include <unistd.h>             /* TEMP_FAILURE_RETRY(), setuid(),
53
 
                                   geteuid(), setsid(), chdir(),
54
 
                                   dup2(), STDERR_FILENO,
55
 
                                   STDOUT_FILENO, fork(), _exit(),
56
 
                                   execv(), ssize_t, readlink(),
57
 
                                   close(), read(), access(), X_OK */
58
 
#include <signal.h>             /* kill(), SIGTERM, struct sigaction,
59
 
                                   sigemptyset(), SIGINT, SIGHUP,
60
 
                                   sigaddset(), SIG_IGN */
61
 
#include <sys/wait.h>           /* waitpid(), WIFEXITED(),
62
 
                                   WEXITSTATUS(), WIFSIGNALED(),
63
 
                                   WTERMSIG() */
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#include <iso646.h>             /* not, and, or */
65
 
#include <sysexits.h>           /* EX_OSERR, EX_USAGE,
66
 
                                   EX_UNAVAILABLE */
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#include <stdint.h>             /* SIZE_MAX */
68
 
#include <dirent.h>             /* struct dirent, scandir(),
69
 
                                   alphasort() */
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#include <inttypes.h>           /* uintmax_t, strtoumax(), SCNuMAX,
71
 
                                   PRIuMAX */
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#include <sys/stat.h>           /* struct stat, lstat(), S_ISLNK() */
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#include <fcntl.h>              /* open(), O_RDONLY */
 
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#include <errno.h>              /* TEMP_FAILURE_RETRY */
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#include <argz.h>               /* argz_count(), argz_extract() */
 
55
#include <stdarg.h>             /* va_list, va_start(), ... */
 
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#include <argp.h>
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sig_atomic_t interrupted_by_signal = 0;
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const char *argp_program_version = "plymouth " VERSION;
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    char **tmp;
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    int i = 0;
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    for (; argv[i] != NULL; i++){
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#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
226
 
      tmp = reallocarray(new_argv, ((size_t)i + 2),
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                         sizeof(const char *));
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#else
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      if(((size_t)i + 2) > (SIZE_MAX / sizeof(const char *))){
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        /* overflow */
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        tmp = NULL;
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        errno = ENOMEM;
233
 
      } else {
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        tmp = realloc(new_argv, ((size_t)i + 2) * sizeof(const char *));
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      }
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#endif
 
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      tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 2));
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      if(tmp == NULL){
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        error_plus(0, errno, "reallocarray");
 
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        error_plus(0, errno, "realloc");
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        free(new_argv);
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        _exit(EX_OSERR);
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      }