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ttyの `/ etc / issue`の前の改行を削除します

ttyのログインプロンプトで/etc/issueのコンテンツの前に挿入されたデフォルトの改行を削除したいと思います。 agettyとsystemdを使用しています。

--nonewlineオプションを[email protected]に追加しようとしました：

ExecStart=/sbin/agetty --nonewline --noclear %I $TERM

その結果：

# systemctl status -l [email protected]
● [email protected] - Getty on tty5
  Loaded: loaded (/usr/lib/systemd/system/[email protected]; disabled)
  Active: failed (Result: start-limit) since sam. 2014-05-17 23:50:13 CEST; 56s ago
    Docs: man:agetty(8)
          man:systemd-getty-generator(8)
          http://0pointer.de/blog/projects/serial-console.html
 Process: 14538 ExecStart=/sbin/agetty --nonewline --noclear %I $TERM (code=exited, status=1/FAILURE)
Main PID: 14538 (code=exited, status=1/FAILURE)

systemd[1]: [email protected] has no holdoff time, scheduling restart.
systemd[1]: Stopping Getty on tty5...
systemd[1]: Starting Getty on tty5...
systemd[1]: [email protected] start request repeated too quickly, refusing to start.
systemd[1]: Failed to start Getty on tty5.
systemd[1]: Unit [email protected] entered failed state.

そして私は得る：

# journalctl --no-pager -b -u [email protected]
-- Logs begin at sam. 2013-10-12 00:20:12 CEST, end at sam. 2014-05-17 23:52:49 CEST. --
systemd[1]: Starting Getty on tty5...
systemd[1]: Started Getty on tty5.
agetty[14497]: Usage:
agetty[14497]: agetty [options] <line> [<baud_rate>,...] [<termtype>]
agetty[14497]: agetty [options] <baud_rate>,... <line> [<termtype>]
agetty[14497]: Options:
agetty[14497]: -8, --8bits                assume 8-bit tty
agetty[14497]: -a, --autologin <user>     login the specified user automatically
agetty[14497]: -c, --noreset              do not reset control mode
agetty[14497]: -E, --remote               use -r <hostname> for login(1)
agetty[14497]: -f, --issue-file <file>    display issue file
agetty[14497]: -h, --flow-control         enable hardware flow control
agetty[14497]: -H, --Host <hostname>      specify login Host
agetty[14497]: -i, --noissue              do not display issue file
agetty[14497]: -I, --init-string <string> set init string
agetty[14497]: -l, --login-program <file> specify login program
agetty[14497]: -L, --local-line[=<mode>]  control the local line flag
agetty[14497]: -m, --extract-baud         extract baud rate during connect
agetty[14497]: -n, --skip-login           do not Prompt for login
agetty[14497]: -o, --login-options <opts> options that are passed to login
agetty[14497]: -p, --login-pause          wait for any key before the login
agetty[14497]: -r, --chroot <dir>         change root to the directory
agetty[14497]: -R, --hangup               do virtually hangup on the tty
agetty[14497]: -s, --keep-baud            try to keep baud rate after break
agetty[14497]: -t, --timeout <number>     login process timeout
agetty[14497]: -U, --detect-case          detect uppercase terminal
agetty[14497]: -w, --wait-cr              wait carriage-return
agetty[14497]: --noclear              do not clear the screen before Prompt
agetty[14497]: --nohints              do not print hints
agetty[14497]: --nonewline            do not print a newline before issue
agetty[14497]: --nohostname           no hostname at all will be shown
agetty[14497]: --long-hostname        show full qualified hostname
agetty[14497]: --erase-chars <string> additional backspace chars
agetty[14497]: --kill-chars <string>  additional kill chars
agetty[14497]: --help                 display this help and exit
agetty[14497]: --version              output version information and exit
agetty[14497]: For more details see agetty(8).
systemd[1]: [email protected] has no holdoff time, scheduling restart.
systemd[1]: Stopping Getty on tty5...

なぜagettyはオプションを認識したくないのですか？それを行う別の方法はありますか？

ttysystemdgetty
3
lbeziaud

バグが発生しました。あります F_NONLソースに見られるように、agettyバイナリで呼び出されることのないディレクティブ：

...
#define F_NONL      (1<<17) /* No newline before issue */
...
/* Parse command-line arguments. */
static void parse_args(int argc, char **argv, struct options *op)
{
    int c;

    enum {
            VERSION_OPTION = CHAR_MAX + 1,
            NOHINTS_OPTION,
            NOHOSTNAME_OPTION,
            LONGHOSTNAME_OPTION,
            HELP_OPTION,
            ERASE_CHARS_OPTION,
            KILL_CHARS_OPTION,
    };
    const struct option longopts[] = {
            {  "8bits",      no_argument,    0,  '8'  },
            {  "autologin",      required_argument,  0,  'a'  },
            ...
            {  "skip-login",     no_argument,    0,  'n'  },
            {  "nonewline",      no_argument,    0,  'N'  },
    while ((c = getopt_long(argc, argv,
               "8a:cC:d:Ef:hH:iI:Jl:L::mnNo:pP:r:Rst:Uw", longopts,
                NULL)) != -1) {
        switch (c) {
        case '8':
            op->flags |= F_EIGHTBITS;
            break;
        case 'a':
            op->autolog = optarg;
            break;
        case 'c':
            op->flags |= F_KEEPCFLAGS;
            break;
        case 'C':
            op->chdir = optarg;
            break;
        case 'd':
            op->delay = atoi(optarg);
            break;
        case 'E':
            op->flags |= F_REMOTE;
            break;
        case 'f':
            op->flags |= F_CUSTISSUE;
            op->issue = optarg;
            break;
        case 'h':
            op->flags |= F_RTSCTS;
            break;
        case 'H':
            fakehost = optarg;
            break;
        case 'i':
            op->flags &= ~F_ISSUE;
            break;
        case 'I':
            init_special_char(optarg, op);
            op->flags |= F_INITSTRING;
            break;
        case 'J':
            op->flags |= F_NOCLEAR;
            break;
        case 'l':
            op->login = optarg;
            break;
        case 'L':
            /* -L and -L=always have the same meaning */
            op->clocal = CLOCAL_MODE_ALWAYS;
            if (optarg) {
                if (strcmp(optarg, "=always") == 0)
                    op->clocal = CLOCAL_MODE_ALWAYS;
                else if (strcmp(optarg, "=never") == 0)
                    op->clocal = CLOCAL_MODE_NEVER;
                else if (strcmp(optarg, "=auto") == 0)
                    op->clocal = CLOCAL_MODE_AUTO;
                else
                    log_err(_("invalid argument of --local-line"));
            }
            break;
        case 'm':
            op->flags |= F_PARSE;
            break;
        case 'n':
            op->flags |= F_NOPROMPT;
            break;
        case 'o':
            op->logopt = optarg;
            break;
        case 'p':
            op->flags |= F_LOGINPAUSE;
            break;
        case 'P':
            op->Nice = atoi(optarg);
            break;
        case 'r':
            op->chroot = optarg;
            break;
        case 'R':
            op->flags |= F_HANGUP;
            break;
        case 's':
            op->flags |= F_KEEPSPEED;
            break;
        case 't':
            if ((op->timeout = atoi(optarg)) <= 0)
                log_err(_("bad timeout value: %s"), optarg);
            break;
        case 'U':
            op->flags |= F_LCUC;
            break;
        case 'w':
            op->flags |= F_WAITCRLF;
            break;
        case NOHINTS_OPTION:
            op->flags |= F_NOHINTS;
            break;
        case NOHOSTNAME_OPTION:
            op->flags |= F_NOHOSTNAME;
            break;
        case LONGHOSTNAME_OPTION:
            op->flags |= F_LONGHNAME;
            break;
        case ERASE_CHARS_OPTION:
            op->erasechars = optarg;
            break;
        case KILL_CHARS_OPTION:
            op->killchars = optarg;
            break;
        case VERSION_OPTION:
            printf(_("%s from %s\n"), program_invocation_short_name,
                   PACKAGE_STRING);
            exit(EXIT_SUCCESS);
        case HELP_OPTION:
            usage(stdout);
        default:
            usage(stderr);
        }
    }

Whileループには、以下のようなブロックがありますが、これは欠落しています。

case 'N':
op->flags |= F_NONL;
break;

追加するのは簡単なパッチだと思います。完全なソースコードは GitHub または kernel.org で確認できます。

3
Braiam