| /* |
| * Alternate Getty (agetty) 'agetty' is a versatile, portable, easy to use |
| * replacement for getty on SunOS 4.1.x or the SAC ttymon/ttyadm/sacadm/pmadm |
| * suite on Solaris and other SVR4 systems. 'agetty' was written by Wietse |
| * Venema, enhanced by John DiMarco, and further enhanced by Dennis Cronin. |
| * |
| * Ported to Linux by Peter Orbaek <poe@daimi.aau.dk> |
| * Adopt the mingetty features for a better support |
| * of virtual consoles by Werner Fink <werner@suse.de> |
| * |
| * This program is freely distributable. |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <termios.h> |
| #include <signal.h> |
| #include <errno.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <ctype.h> |
| #include <utmpx.h> |
| #include <getopt.h> |
| #include <time.h> |
| #include <sys/socket.h> |
| #include <langinfo.h> |
| #include <grp.h> |
| #include <arpa/inet.h> |
| #include <netdb.h> |
| #include <ifaddrs.h> |
| #include <net/if.h> |
| #include <sys/utsname.h> |
| |
| #include "strutils.h" |
| #include "all-io.h" |
| #include "nls.h" |
| #include "pathnames.h" |
| #include "c.h" |
| #include "widechar.h" |
| #include "ttyutils.h" |
| #include "color-names.h" |
| #include "env.h" |
| |
| #ifdef USE_PLYMOUTH_SUPPORT |
| # include "plymouth-ctrl.h" |
| #endif |
| |
| #ifdef HAVE_SYS_PARAM_H |
| # include <sys/param.h> |
| #endif |
| |
| #if defined(__FreeBSD_kernel__) |
| # include <pty.h> |
| # ifdef HAVE_UTMP_H |
| # include <utmp.h> |
| # endif |
| # ifdef HAVE_LIBUTIL_H |
| # include <libutil.h> |
| # endif |
| #endif |
| |
| #ifdef __linux__ |
| # include <sys/kd.h> |
| # define USE_SYSLOG |
| # ifndef DEFAULT_VCTERM |
| # define DEFAULT_VCTERM "linux" |
| # endif |
| # if defined (__s390__) || defined (__s390x__) |
| # define DEFAULT_TTYS0 "dumb" |
| # define DEFAULT_TTY32 "ibm327x" |
| # define DEFAULT_TTYS1 "vt220" |
| # endif |
| # ifndef DEFAULT_STERM |
| # define DEFAULT_STERM "vt102" |
| # endif |
| #elif defined(__GNU__) |
| # define USE_SYSLOG |
| # ifndef DEFAULT_VCTERM |
| # define DEFAULT_VCTERM "hurd" |
| # endif |
| # ifndef DEFAULT_STERM |
| # define DEFAULT_STERM "vt102" |
| # endif |
| #else |
| # ifndef DEFAULT_VCTERM |
| # define DEFAULT_VCTERM "vt100" |
| # endif |
| # ifndef DEFAULT_STERM |
| # define DEFAULT_STERM "vt100" |
| # endif |
| #endif |
| |
| #ifdef __FreeBSD_kernel__ |
| #define USE_SYSLOG |
| #endif |
| |
| /* If USE_SYSLOG is undefined all diagnostics go to /dev/console. */ |
| #ifdef USE_SYSLOG |
| # include <syslog.h> |
| #endif |
| |
| /* |
| * Some heuristics to find out what environment we are in: if it is not |
| * System V, assume it is SunOS 4. The LOGIN_PROCESS is defined in System V |
| * utmp.h, which will select System V style getty. |
| */ |
| #ifdef LOGIN_PROCESS |
| # define SYSV_STYLE |
| #endif |
| |
| /* |
| * Things you may want to modify. |
| * |
| * If ISSUE_SUPPORT is not defined, agetty will never display the contents of |
| * the /etc/issue file. You will not want to spit out large "issue" files at |
| * the wrong baud rate. Relevant for System V only. |
| * |
| * You may disagree with the default line-editing etc. characters defined |
| * below. Note, however, that DEL cannot be used for interrupt generation |
| * and for line editing at the same time. |
| */ |
| |
| /* Displayed before the login prompt. */ |
| #ifdef SYSV_STYLE |
| # define ISSUE_SUPPORT |
| # if defined(HAVE_SCANDIRAT) && defined(HAVE_OPENAT) |
| # include <dirent.h> |
| # include "fileutils.h" |
| # define ISSUEDIR_SUPPORT |
| # define ISSUEDIR_EXT ".issue" |
| # define ISSUEDIR_EXTSIZ (sizeof(ISSUEDIR_EXT) - 1) |
| # endif |
| #endif |
| |
| /* Login prompt. */ |
| #define LOGIN "login: " |
| #define LOGIN_ARGV_MAX 16 /* Numbers of args for login */ |
| |
| /* |
| * agetty --reload |
| */ |
| #ifdef AGETTY_RELOAD |
| # include <sys/inotify.h> |
| # include <linux/netlink.h> |
| # include <linux/rtnetlink.h> |
| # define AGETTY_RELOAD_FILENAME "/run/agetty.reload" /* trigger file */ |
| # define AGETTY_RELOAD_FDNONE -2 /* uninitialized fd */ |
| static int inotify_fd = AGETTY_RELOAD_FDNONE; |
| static int netlink_fd = AGETTY_RELOAD_FDNONE; |
| #endif |
| |
| /* |
| * When multiple baud rates are specified on the command line, the first one |
| * we will try is the first one specified. |
| */ |
| #define FIRST_SPEED 0 |
| |
| /* Storage for command-line options. */ |
| #define MAX_SPEED 10 /* max. nr. of baud rates */ |
| |
| struct options { |
| int flags; /* toggle switches, see below */ |
| unsigned int timeout; /* time-out period */ |
| char *autolog; /* login the user automatically */ |
| char *chdir; /* Chdir before the login */ |
| char *chroot; /* Chroot before the login */ |
| char *login; /* login program */ |
| char *logopt; /* options for login program */ |
| char *tty; /* name of tty */ |
| char *vcline; /* line of virtual console */ |
| char *term; /* terminal type */ |
| char *initstring; /* modem init string */ |
| char *issue; /* alternative issue file or directory */ |
| char *erasechars; /* string with erase chars */ |
| char *killchars; /* string with kill chars */ |
| char *osrelease; /* /etc/os-release data */ |
| unsigned int delay; /* Sleep seconds before prompt */ |
| int nice; /* Run login with this priority */ |
| int numspeed; /* number of baud rates to try */ |
| int clocal; /* CLOCAL_MODE_* */ |
| int kbmode; /* Keyboard mode if virtual console */ |
| speed_t speeds[MAX_SPEED]; /* baud rates to be tried */ |
| }; |
| |
| enum { |
| CLOCAL_MODE_AUTO = 0, |
| CLOCAL_MODE_ALWAYS, |
| CLOCAL_MODE_NEVER |
| }; |
| |
| #define F_PARSE (1<<0) /* process modem status messages */ |
| #define F_ISSUE (1<<1) /* display /etc/issue or /etc/issue.d */ |
| #define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */ |
| |
| #define F_INITSTRING (1<<4) /* initstring is set */ |
| #define F_WAITCRLF (1<<5) /* wait for CR or LF */ |
| |
| #define F_NOPROMPT (1<<7) /* do not ask for login name! */ |
| #define F_LCUC (1<<8) /* support for *LCUC stty modes */ |
| #define F_KEEPSPEED (1<<9) /* follow baud rate from kernel */ |
| #define F_KEEPCFLAGS (1<<10) /* reuse c_cflags setup from kernel */ |
| #define F_EIGHTBITS (1<<11) /* Assume 8bit-clean tty */ |
| #define F_VCONSOLE (1<<12) /* This is a virtual console */ |
| #define F_HANGUP (1<<13) /* Do call vhangup(2) */ |
| #define F_UTF8 (1<<14) /* We can do UTF8 */ |
| #define F_LOGINPAUSE (1<<15) /* Wait for any key before dropping login prompt */ |
| #define F_NOCLEAR (1<<16) /* Do not clear the screen before prompting */ |
| #define F_NONL (1<<17) /* No newline before issue */ |
| #define F_NOHOSTNAME (1<<18) /* Do not show the hostname */ |
| #define F_LONGHNAME (1<<19) /* Show Full qualified hostname */ |
| #define F_NOHINTS (1<<20) /* Don't print hints */ |
| #define F_REMOTE (1<<21) /* Add '-h fakehost' to login(1) command line */ |
| |
| #define serial_tty_option(opt, flag) \ |
| (((opt)->flags & (F_VCONSOLE|(flag))) == (flag)) |
| |
| struct Speedtab { |
| long speed; |
| speed_t code; |
| }; |
| |
| static const struct Speedtab speedtab[] = { |
| {50, B50}, |
| {75, B75}, |
| {110, B110}, |
| {134, B134}, |
| {150, B150}, |
| {200, B200}, |
| {300, B300}, |
| {600, B600}, |
| {1200, B1200}, |
| {1800, B1800}, |
| {2400, B2400}, |
| {4800, B4800}, |
| {9600, B9600}, |
| #ifdef B19200 |
| {19200, B19200}, |
| #elif defined(EXTA) |
| {19200, EXTA}, |
| #endif |
| #ifdef B38400 |
| {38400, B38400}, |
| #elif defined(EXTB) |
| {38400, EXTB}, |
| #endif |
| #ifdef B57600 |
| {57600, B57600}, |
| #endif |
| #ifdef B115200 |
| {115200, B115200}, |
| #endif |
| #ifdef B230400 |
| {230400, B230400}, |
| #endif |
| #ifdef B460800 |
| {460800, B460800}, |
| #endif |
| #ifdef B500000 |
| {500000, B500000}, |
| #endif |
| #ifdef B576000 |
| {576000, B576000}, |
| #endif |
| #ifdef B921600 |
| {921600, B921600}, |
| #endif |
| #ifdef B1000000 |
| {1000000, B1000000}, |
| #endif |
| #ifdef B1152000 |
| {1152000, B1152000}, |
| #endif |
| #ifdef B1500000 |
| {1500000, B1500000}, |
| #endif |
| #ifdef B2000000 |
| {2000000, B2000000}, |
| #endif |
| #ifdef B2500000 |
| {2500000, B2500000}, |
| #endif |
| #ifdef B3000000 |
| {3000000, B3000000}, |
| #endif |
| #ifdef B3500000 |
| {3500000, B3500000}, |
| #endif |
| #ifdef B4000000 |
| {4000000, B4000000}, |
| #endif |
| {0, 0}, |
| }; |
| |
| static void init_special_char(char* arg, struct options *op); |
| static void parse_args(int argc, char **argv, struct options *op); |
| static void parse_speeds(struct options *op, char *arg); |
| static void update_utmp(struct options *op); |
| static void open_tty(char *tty, struct termios *tp, struct options *op); |
| static void termio_init(struct options *op, struct termios *tp); |
| static void reset_vc (const struct options *op, struct termios *tp); |
| static void auto_baud(struct termios *tp); |
| static void list_speeds(void); |
| static void output_special_char (unsigned char c, struct options *op, |
| struct termios *tp, FILE *fp); |
| static void do_prompt(struct options *op, struct termios *tp); |
| static void next_speed(struct options *op, struct termios *tp); |
| static char *get_logname(struct options *op, |
| struct termios *tp, struct chardata *cp); |
| static void termio_final(struct options *op, |
| struct termios *tp, struct chardata *cp); |
| static int caps_lock(char *s); |
| static speed_t bcode(char *s); |
| static void usage(void) __attribute__((__noreturn__)); |
| static void exit_slowly(int code) __attribute__((__noreturn__)); |
| static void log_err(const char *, ...) __attribute__((__noreturn__)) |
| __attribute__((__format__(printf, 1, 2))); |
| static void log_warn (const char *, ...) |
| __attribute__((__format__(printf, 1, 2))); |
| static ssize_t append(char *dest, size_t len, const char *sep, const char *src); |
| static void check_username (const char* nm); |
| static void login_options_to_argv(char *argv[], int *argc, char *str, char *username); |
| static void reload_agettys(void); |
| static void print_issue_file(struct options *op, struct termios *tp); |
| |
| /* Fake hostname for ut_host specified on command line. */ |
| static char *fakehost; |
| |
| #ifdef DEBUGGING |
| # include "closestream.h" |
| # ifndef DEBUG_OUTPUT |
| # define DEBUG_OUTPUT "/dev/tty10" |
| # endif |
| # define debug(s) do { fprintf(dbf,s); fflush(dbf); } while (0) |
| FILE *dbf; |
| #else |
| # define debug(s) do { ; } while (0) |
| #endif |
| |
| int main(int argc, char **argv) |
| { |
| char *username = NULL; /* login name, given to /bin/login */ |
| struct chardata chardata; /* will be set by get_logname() */ |
| struct termios termios; /* terminal mode bits */ |
| struct options options = { |
| .flags = F_ISSUE, /* show /etc/issue (SYSV_STYLE) */ |
| .login = _PATH_LOGIN, /* default login program */ |
| .tty = "tty1" /* default tty line */ |
| }; |
| char *login_argv[LOGIN_ARGV_MAX + 1]; |
| int login_argc = 0; |
| struct sigaction sa, sa_hup, sa_quit, sa_int; |
| sigset_t set; |
| |
| setlocale(LC_ALL, ""); |
| bindtextdomain(PACKAGE, LOCALEDIR); |
| textdomain(PACKAGE); |
| |
| /* In case vhangup(2) has to called */ |
| sa.sa_handler = SIG_IGN; |
| sa.sa_flags = SA_RESTART; |
| sigemptyset (&sa.sa_mask); |
| sigaction(SIGHUP, &sa, &sa_hup); |
| sigaction(SIGQUIT, &sa, &sa_quit); |
| sigaction(SIGINT, &sa, &sa_int); |
| |
| #ifdef DEBUGGING |
| dbf = fopen(DEBUG_OUTPUT, "w"); |
| for (int i = 1; i < argc; i++) { |
| if (i > 1) |
| debug(" "); |
| debug(argv[i]); |
| } |
| debug("\n"); |
| #endif /* DEBUGGING */ |
| |
| /* Parse command-line arguments. */ |
| parse_args(argc, argv, &options); |
| |
| login_argv[login_argc++] = options.login; /* set login program name */ |
| |
| /* Update the utmp file. */ |
| #ifdef SYSV_STYLE |
| update_utmp(&options); |
| #endif |
| if (options.delay) |
| sleep(options.delay); |
| |
| debug("calling open_tty\n"); |
| |
| /* Open the tty as standard { input, output, error }. */ |
| open_tty(options.tty, &termios, &options); |
| |
| /* Unmask SIGHUP if inherited */ |
| sigemptyset(&set); |
| sigaddset(&set, SIGHUP); |
| sigprocmask(SIG_UNBLOCK, &set, NULL); |
| sigaction(SIGHUP, &sa_hup, NULL); |
| |
| tcsetpgrp(STDIN_FILENO, getpid()); |
| |
| /* Default is to follow the current line speed and then default to 9600 */ |
| if ((options.flags & F_VCONSOLE) == 0 && options.numspeed == 0) { |
| options.speeds[options.numspeed++] = bcode("9600"); |
| options.flags |= F_KEEPSPEED; |
| } |
| |
| /* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */ |
| debug("calling termio_init\n"); |
| termio_init(&options, &termios); |
| |
| /* Write the modem init string and DO NOT flush the buffers. */ |
| if (serial_tty_option(&options, F_INITSTRING) && |
| options.initstring && *options.initstring != '\0') { |
| debug("writing init string\n"); |
| write_all(STDOUT_FILENO, options.initstring, |
| strlen(options.initstring)); |
| } |
| |
| if (options.flags & F_VCONSOLE || options.clocal != CLOCAL_MODE_ALWAYS) |
| /* Go to blocking mode unless -L is specified, this change |
| * affects stdout, stdin and stderr as all the file descriptors |
| * are created by dup(). */ |
| fcntl(STDOUT_FILENO, F_SETFL, |
| fcntl(STDOUT_FILENO, F_GETFL, 0) & ~O_NONBLOCK); |
| |
| /* Optionally detect the baud rate from the modem status message. */ |
| debug("before autobaud\n"); |
| if (serial_tty_option(&options, F_PARSE)) |
| auto_baud(&termios); |
| |
| /* Set the optional timer. */ |
| if (options.timeout) |
| alarm(options.timeout); |
| |
| /* Optionally wait for CR or LF before writing /etc/issue */ |
| if (serial_tty_option(&options, F_WAITCRLF)) { |
| char ch; |
| |
| debug("waiting for cr-lf\n"); |
| while (read(STDIN_FILENO, &ch, 1) == 1) { |
| /* Strip "parity bit". */ |
| ch &= 0x7f; |
| #ifdef DEBUGGING |
| fprintf(dbf, "read %c\n", ch); |
| #endif |
| if (ch == '\n' || ch == '\r') |
| break; |
| } |
| } |
| |
| INIT_CHARDATA(&chardata); |
| |
| if (options.autolog) { |
| debug("doing auto login\n"); |
| username = options.autolog; |
| } |
| |
| if (options.flags & F_NOPROMPT) { /* --skip-login */ |
| print_issue_file(&options, &termios); |
| } else { /* regular (auto)login */ |
| if (options.autolog) { |
| /* Autologin prompt */ |
| do_prompt(&options, &termios); |
| printf(_("%s%s (automatic login)\n"), LOGIN, options.autolog); |
| } else { |
| /* Read the login name. */ |
| debug("reading login name\n"); |
| while ((username = |
| get_logname(&options, &termios, &chardata)) == NULL) |
| if ((options.flags & F_VCONSOLE) == 0 && options.numspeed) |
| next_speed(&options, &termios); |
| } |
| } |
| |
| /* Disable timer. */ |
| if (options.timeout) |
| alarm(0); |
| |
| if ((options.flags & F_VCONSOLE) == 0) { |
| /* Finalize the termios settings. */ |
| termio_final(&options, &termios, &chardata); |
| |
| /* Now the newline character should be properly written. */ |
| write_all(STDOUT_FILENO, "\r\n", 2); |
| } |
| |
| sigaction(SIGQUIT, &sa_quit, NULL); |
| sigaction(SIGINT, &sa_int, NULL); |
| |
| if (username) |
| check_username(username); |
| |
| if (options.logopt) { |
| /* |
| * The --login-options completely overwrites the default |
| * way how agetty composes login(1) command line. |
| */ |
| login_options_to_argv(login_argv, &login_argc, |
| options.logopt, username); |
| } else { |
| if (options.flags & F_REMOTE) { |
| if (fakehost) { |
| login_argv[login_argc++] = "-h"; |
| login_argv[login_argc++] = fakehost; |
| } else if (options.flags & F_NOHOSTNAME) |
| login_argv[login_argc++] = "-H"; |
| } |
| if (username) { |
| if (options.autolog) |
| login_argv[login_argc++] = "-f"; |
| else |
| login_argv[login_argc++] = "--"; |
| login_argv[login_argc++] = username; |
| } |
| } |
| |
| login_argv[login_argc] = NULL; /* last login argv */ |
| |
| if (options.chroot && chroot(options.chroot) < 0) |
| log_err(_("%s: can't change root directory %s: %m"), |
| options.tty, options.chroot); |
| if (options.chdir && chdir(options.chdir) < 0) |
| log_err(_("%s: can't change working directory %s: %m"), |
| options.tty, options.chdir); |
| if (options.nice && nice(options.nice) < 0) |
| log_warn(_("%s: can't change process priority: %m"), |
| options.tty); |
| |
| free(options.osrelease); |
| #ifdef DEBUGGING |
| if (close_stream(dbf) != 0) |
| log_err("write failed: %s", DEBUG_OUTPUT); |
| #endif |
| |
| /* Let the login program take care of password validation. */ |
| execv(options.login, login_argv); |
| log_err(_("%s: can't exec %s: %m"), options.tty, login_argv[0]); |
| } |
| |
| /* |
| * Returns : @str if \u not found |
| * : @username if @str equal to "\u" |
| * : newly allocated string if \u mixed with something other |
| */ |
| static char *replace_u(char *str, char *username) |
| { |
| char *entry = NULL, *p = str; |
| size_t usz = username ? strlen(username) : 0; |
| |
| while (*p) { |
| size_t sz; |
| char *tp, *old = entry; |
| |
| if (memcmp(p, "\\u", 2)) { |
| p++; |
| continue; /* no \u */ |
| } |
| sz = strlen(str); |
| |
| if (p == str && sz == 2) { |
| /* 'str' contains only '\u' */ |
| free(old); |
| return username; |
| } |
| |
| tp = entry = malloc(sz + usz); |
| if (!tp) |
| log_err(_("failed to allocate memory: %m")); |
| |
| if (p != str) { |
| /* copy chars before \u */ |
| memcpy(tp, str, p - str); |
| tp += p - str; |
| } |
| if (usz) { |
| /* copy username */ |
| memcpy(tp, username, usz); |
| tp += usz; |
| } |
| if (*(p + 2)) |
| /* copy chars after \u + \0 */ |
| memcpy(tp, p + 2, sz - (p - str) - 1); |
| else |
| *tp = '\0'; |
| |
| p = tp; |
| str = entry; |
| free(old); |
| } |
| |
| return entry ? entry : str; |
| } |
| |
| static void login_options_to_argv(char *argv[], int *argc, |
| char *str, char *username) |
| { |
| char *p; |
| int i = *argc; |
| |
| while (str && isspace(*str)) |
| str++; |
| p = str; |
| |
| while (p && *p && i < LOGIN_ARGV_MAX) { |
| if (isspace(*p)) { |
| *p = '\0'; |
| while (isspace(*++p)) |
| ; |
| if (*p) { |
| argv[i++] = replace_u(str, username); |
| str = p; |
| } |
| } else |
| p++; |
| } |
| if (str && *str && i < LOGIN_ARGV_MAX) |
| argv[i++] = replace_u(str, username); |
| *argc = i; |
| } |
| |
| static void output_version(void) |
| { |
| static const char *features[] = { |
| #ifdef DEBUGGING |
| "debug", |
| #endif |
| #ifdef CRTSCTS |
| "flow control", |
| #endif |
| #ifdef KDGKBLED |
| "hints", |
| #endif |
| #ifdef ISSUE_SUPPORT |
| "issue", |
| #endif |
| #ifdef ISSUEDIR_SUPPORT |
| "issue.d", |
| #endif |
| #ifdef KDGKBMODE |
| "keyboard mode", |
| #endif |
| #ifdef USE_PLYMOUTH_SUPPORT |
| "plymouth", |
| #endif |
| #ifdef AGETTY_RELOAD |
| "reload", |
| #endif |
| #ifdef USE_SYSLOG |
| "syslog", |
| #endif |
| #ifdef HAVE_WIDECHAR |
| "widechar", |
| #endif |
| NULL |
| }; |
| unsigned int i; |
| |
| printf( _("%s from %s"), program_invocation_short_name, PACKAGE_STRING); |
| fputs(" (", stdout); |
| for (i = 0; features[i]; i++) { |
| if (0 < i) |
| fputs(", ", stdout); |
| printf("%s", features[i]); |
| } |
| fputs(")\n", stdout); |
| } |
| |
| #define is_speed(str) (strlen((str)) == strspn((str), "0123456789,")) |
| |
| /* 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, |
| RELOAD_OPTION, |
| LIST_SPEEDS_OPTION, |
| }; |
| const struct option longopts[] = { |
| { "8bits", no_argument, NULL, '8' }, |
| { "autologin", required_argument, NULL, 'a' }, |
| { "noreset", no_argument, NULL, 'c' }, |
| { "chdir", required_argument, NULL, 'C' }, |
| { "delay", required_argument, NULL, 'd' }, |
| { "remote", no_argument, NULL, 'E' }, |
| { "issue-file", required_argument, NULL, 'f' }, |
| { "flow-control", no_argument, NULL, 'h' }, |
| { "host", required_argument, NULL, 'H' }, |
| { "noissue", no_argument, NULL, 'i' }, |
| { "init-string", required_argument, NULL, 'I' }, |
| { "noclear", no_argument, NULL, 'J' }, |
| { "login-program", required_argument, NULL, 'l' }, |
| { "local-line", optional_argument, NULL, 'L' }, |
| { "extract-baud", no_argument, NULL, 'm' }, |
| { "list-speeds", no_argument, NULL, LIST_SPEEDS_OPTION }, |
| { "skip-login", no_argument, NULL, 'n' }, |
| { "nonewline", no_argument, NULL, 'N' }, |
| { "login-options", required_argument, NULL, 'o' }, |
| { "login-pause", no_argument, NULL, 'p' }, |
| { "nice", required_argument, NULL, 'P' }, |
| { "chroot", required_argument, NULL, 'r' }, |
| { "hangup", no_argument, NULL, 'R' }, |
| { "keep-baud", no_argument, NULL, 's' }, |
| { "timeout", required_argument, NULL, 't' }, |
| { "detect-case", no_argument, NULL, 'U' }, |
| { "wait-cr", no_argument, NULL, 'w' }, |
| { "nohints", no_argument, NULL, NOHINTS_OPTION }, |
| { "nohostname", no_argument, NULL, NOHOSTNAME_OPTION }, |
| { "long-hostname", no_argument, NULL, LONGHOSTNAME_OPTION }, |
| { "reload", no_argument, NULL, RELOAD_OPTION }, |
| { "version", no_argument, NULL, VERSION_OPTION }, |
| { "help", no_argument, NULL, HELP_OPTION }, |
| { "erase-chars", required_argument, NULL, ERASE_CHARS_OPTION }, |
| { "kill-chars", required_argument, NULL, KILL_CHARS_OPTION }, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| 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 = strtou32_or_err(optarg, _("invalid delay argument")); |
| break; |
| case 'E': |
| op->flags |= F_REMOTE; |
| break; |
| case 'f': |
| 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 'N': |
| op->flags |= F_NONL; |
| break; |
| case 'o': |
| op->logopt = optarg; |
| break; |
| case 'p': |
| op->flags |= F_LOGINPAUSE; |
| break; |
| case 'P': |
| op->nice = strtos32_or_err(optarg, _("invalid nice argument")); |
| break; |
| case 'r': |
| op->chroot = optarg; |
| break; |
| case 'R': |
| op->flags |= F_HANGUP; |
| break; |
| case 's': |
| op->flags |= F_KEEPSPEED; |
| break; |
| case 't': |
| op->timeout = strtou32_or_err(optarg, _("invalid timeout argument")); |
| 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 RELOAD_OPTION: |
| reload_agettys(); |
| exit(EXIT_SUCCESS); |
| case LIST_SPEEDS_OPTION: |
| list_speeds(); |
| exit(EXIT_SUCCESS); |
| case VERSION_OPTION: |
| output_version(); |
| exit(EXIT_SUCCESS); |
| case HELP_OPTION: |
| usage(); |
| default: |
| errtryhelp(EXIT_FAILURE); |
| } |
| } |
| |
| debug("after getopt loop\n"); |
| |
| if (argc < optind + 1) { |
| log_warn(_("not enough arguments")); |
| errx(EXIT_FAILURE, _("not enough arguments")); |
| } |
| |
| /* Accept "tty", "baudrate tty", and "tty baudrate". */ |
| if (is_speed(argv[optind])) { |
| /* Assume BSD style speed. */ |
| parse_speeds(op, argv[optind++]); |
| if (argc < optind + 1) { |
| log_warn(_("not enough arguments")); |
| errx(EXIT_FAILURE, _("not enough arguments")); |
| } |
| op->tty = argv[optind++]; |
| } else { |
| op->tty = argv[optind++]; |
| if (argc > optind) { |
| char *v = argv[optind]; |
| if (is_speed(v)) { |
| parse_speeds(op, v); |
| optind++; |
| } |
| } |
| } |
| |
| /* On virtual console remember the line which is used for */ |
| if (strncmp(op->tty, "tty", 3) == 0 && |
| strspn(op->tty + 3, "0123456789") == strlen(op->tty+3)) |
| op->vcline = op->tty+3; |
| |
| if (argc > optind && argv[optind]) |
| op->term = argv[optind]; |
| |
| debug("exiting parseargs\n"); |
| } |
| |
| /* Parse alternate baud rates. */ |
| static void parse_speeds(struct options *op, char *arg) |
| { |
| char *cp; |
| char *str = strdup(arg); |
| |
| if (!str) |
| log_err(_("failed to allocate memory: %m")); |
| |
| debug("entered parse_speeds:\n"); |
| for (cp = strtok(str, ","); cp != NULL; cp = strtok((char *)0, ",")) { |
| if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0) |
| log_err(_("bad speed: %s"), cp); |
| if (op->numspeed >= MAX_SPEED) |
| log_err(_("too many alternate speeds")); |
| } |
| debug("exiting parsespeeds\n"); |
| free(str); |
| } |
| |
| #ifdef SYSV_STYLE |
| |
| /* Update our utmp entry. */ |
| static void update_utmp(struct options *op) |
| { |
| struct utmpx ut; |
| time_t t; |
| pid_t pid = getpid(); |
| pid_t sid = getsid(0); |
| char *vcline = op->vcline; |
| char *line = op->tty; |
| struct utmpx *utp; |
| |
| /* |
| * The utmp file holds miscellaneous information about things started by |
| * /sbin/init and other system-related events. Our purpose is to update |
| * the utmp entry for the current process, in particular the process type |
| * and the tty line we are listening to. Return successfully only if the |
| * utmp file can be opened for update, and if we are able to find our |
| * entry in the utmp file. |
| */ |
| utmpxname(_PATH_UTMP); |
| setutxent(); |
| |
| /* |
| * Find my pid in utmp. |
| * |
| * FIXME: Earlier (when was that?) code here tested only utp->ut_type != |
| * INIT_PROCESS, so maybe the >= here should be >. |
| * |
| * FIXME: The present code is taken from login.c, so if this is changed, |
| * maybe login has to be changed as well (is this true?). |
| */ |
| while ((utp = getutxent())) |
| if (utp->ut_pid == pid |
| && utp->ut_type >= INIT_PROCESS |
| && utp->ut_type <= DEAD_PROCESS) |
| break; |
| |
| if (utp) { |
| memcpy(&ut, utp, sizeof(ut)); |
| } else { |
| /* Some inits do not initialize utmp. */ |
| memset(&ut, 0, sizeof(ut)); |
| if (vcline && *vcline) |
| /* Standard virtual console devices */ |
| strncpy(ut.ut_id, vcline, sizeof(ut.ut_id)); |
| else { |
| size_t len = strlen(line); |
| char * ptr; |
| if (len >= sizeof(ut.ut_id)) |
| ptr = line + len - sizeof(ut.ut_id); |
| else |
| ptr = line; |
| strncpy(ut.ut_id, ptr, sizeof(ut.ut_id)); |
| } |
| } |
| |
| strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user)); |
| strncpy(ut.ut_line, line, sizeof(ut.ut_line)); |
| if (fakehost) |
| strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); |
| time(&t); |
| ut.ut_tv.tv_sec = t; |
| ut.ut_type = LOGIN_PROCESS; |
| ut.ut_pid = pid; |
| ut.ut_session = sid; |
| |
| pututxline(&ut); |
| endutxent(); |
| |
| updwtmpx(_PATH_WTMP, &ut); |
| } |
| |
| #endif /* SYSV_STYLE */ |
| |
| /* Set up tty as stdin, stdout & stderr. */ |
| static void open_tty(char *tty, struct termios *tp, struct options *op) |
| { |
| const pid_t pid = getpid(); |
| int closed = 0; |
| #ifndef KDGKBMODE |
| int serial; |
| #endif |
| |
| /* Set up new standard input, unless we are given an already opened port. */ |
| |
| if (strcmp(tty, "-") != 0) { |
| char buf[PATH_MAX+1]; |
| struct group *gr = NULL; |
| struct stat st; |
| int fd, len; |
| pid_t tid; |
| gid_t gid = 0; |
| |
| /* Use tty group if available */ |
| if ((gr = getgrnam("tty"))) |
| gid = gr->gr_gid; |
| |
| len = snprintf(buf, sizeof(buf), "/dev/%s", tty); |
| if (len < 0 || (size_t)len >= sizeof(buf)) |
| log_err(_("/dev/%s: cannot open as standard input: %m"), tty); |
| |
| /* Open the tty as standard input. */ |
| if ((fd = open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0)) < 0) |
| log_err(_("/dev/%s: cannot open as standard input: %m"), tty); |
| |
| /* |
| * There is always a race between this reset and the call to |
| * vhangup() that s.o. can use to get access to your tty. |
| * Linux login(1) will change tty permissions. Use root owner and group |
| * with permission -rw------- for the period between getty and login. |
| */ |
| if (fchown(fd, 0, gid) || fchmod(fd, (gid ? 0620 : 0600))) { |
| if (errno == EROFS) |
| log_warn("%s: %m", buf); |
| else |
| log_err("%s: %m", buf); |
| } |
| |
| /* Sanity checks... */ |
| if (fstat(fd, &st) < 0) |
| log_err("%s: %m", buf); |
| if ((st.st_mode & S_IFMT) != S_IFCHR) |
| log_err(_("/dev/%s: not a character device"), tty); |
| if (!isatty(fd)) |
| log_err(_("/dev/%s: not a tty"), tty); |
| |
| if (((tid = tcgetsid(fd)) < 0) || (pid != tid)) { |
| if (ioctl(fd, TIOCSCTTY, 1) == -1) |
| log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
| } |
| |
| close(STDIN_FILENO); |
| errno = 0; |
| |
| if (op->flags & F_HANGUP) { |
| |
| if (ioctl(fd, TIOCNOTTY)) |
| debug("TIOCNOTTY ioctl failed\n"); |
| |
| /* |
| * Let's close all file descriptors before vhangup |
| * https://lkml.org/lkml/2012/6/5/145 |
| */ |
| close(fd); |
| close(STDOUT_FILENO); |
| close(STDERR_FILENO); |
| errno = 0; |
| closed = 1; |
| |
| if (vhangup()) |
| log_err(_("/dev/%s: vhangup() failed: %m"), tty); |
| } else |
| close(fd); |
| |
| debug("open(2)\n"); |
| if (open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0) != 0) |
| log_err(_("/dev/%s: cannot open as standard input: %m"), tty); |
| |
| if (((tid = tcgetsid(STDIN_FILENO)) < 0) || (pid != tid)) { |
| if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) == -1) |
| log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
| } |
| |
| } else { |
| |
| /* |
| * Standard input should already be connected to an open port. Make |
| * sure it is open for read/write. |
| */ |
| |
| if ((fcntl(STDIN_FILENO, F_GETFL, 0) & O_RDWR) != O_RDWR) |
| log_err(_("%s: not open for read/write"), tty); |
| |
| } |
| |
| if (tcsetpgrp(STDIN_FILENO, pid)) |
| log_warn(_("/dev/%s: cannot set process group: %m"), tty); |
| |
| /* Get rid of the present outputs. */ |
| if (!closed) { |
| close(STDOUT_FILENO); |
| close(STDERR_FILENO); |
| errno = 0; |
| } |
| |
| /* Set up standard output and standard error file descriptors. */ |
| debug("duping\n"); |
| |
| /* set up stdout and stderr */ |
| if (dup(STDIN_FILENO) != 1 || dup(STDIN_FILENO) != 2) |
| log_err(_("%s: dup problem: %m"), tty); |
| |
| /* make stdio unbuffered for slow modem lines */ |
| setvbuf(stdout, NULL, _IONBF, 0); |
| |
| /* |
| * The following ioctl will fail if stdin is not a tty, but also when |
| * there is noise on the modem control lines. In the latter case, the |
| * common course of action is (1) fix your cables (2) give the modem |
| * more time to properly reset after hanging up. |
| * |
| * SunOS users can achieve (2) by patching the SunOS kernel variable |
| * "zsadtrlow" to a larger value; 5 seconds seems to be a good value. |
| * http://www.sunmanagers.org/archives/1993/0574.html |
| */ |
| memset(tp, 0, sizeof(struct termios)); |
| if (tcgetattr(STDIN_FILENO, tp) < 0) |
| log_err(_("%s: failed to get terminal attributes: %m"), tty); |
| |
| #if defined (__s390__) || defined (__s390x__) |
| if (!op->term) { |
| /* |
| * Special terminal on first serial line on a S/390(x) which |
| * is due legacy reasons a block terminal of type 3270 or |
| * higher. Whereas the second serial line on a S/390(x) is |
| * a real character terminal which is compatible with VT220. |
| */ |
| if (strcmp(op->tty, "ttyS0") == 0) /* linux/drivers/s390/char/con3215.c */ |
| op->term = DEFAULT_TTYS0; |
| else if (strncmp(op->tty, "3270/tty", 8) == 0) /* linux/drivers/s390/char/con3270.c */ |
| op->term = DEFAULT_TTY32; |
| else if (strcmp(op->tty, "ttyS1") == 0) /* linux/drivers/s390/char/sclp_vt220.c */ |
| op->term = DEFAULT_TTYS1; |
| } |
| #endif |
| |
| #if defined(__FreeBSD_kernel__) |
| login_tty (0); |
| #endif |
| |
| /* |
| * Detect if this is a virtual console or serial/modem line. |
| * In case of a virtual console the ioctl KDGKBMODE succeeds |
| * whereas on other lines it will fails. |
| */ |
| #ifdef KDGKBMODE |
| if (ioctl(STDIN_FILENO, KDGKBMODE, &op->kbmode) == 0) |
| #else |
| if (ioctl(STDIN_FILENO, TIOCMGET, &serial) < 0 && (errno == EINVAL)) |
| #endif |
| { |
| op->flags |= F_VCONSOLE; |
| if (!op->term) |
| op->term = DEFAULT_VCTERM; |
| } else { |
| #ifdef K_RAW |
| op->kbmode = K_RAW; |
| #endif |
| if (!op->term) |
| op->term = DEFAULT_STERM; |
| } |
| |
| if (setenv("TERM", op->term, 1) != 0) |
| log_err(_("failed to set the %s environment variable"), "TERM"); |
| } |
| |
| /* Initialize termios settings. */ |
| static void termio_clear(int fd) |
| { |
| /* |
| * Do not write a full reset (ESC c) because this destroys |
| * the unicode mode again if the terminal was in unicode |
| * mode. Also it clears the CONSOLE_MAGIC features which |
| * are required for some languages/console-fonts. |
| * Just put the cursor to the home position (ESC [ H), |
| * erase everything below the cursor (ESC [ J), and set the |
| * scrolling region to the full window (ESC [ r) |
| */ |
| write_all(fd, "\033[r\033[H\033[J", 9); |
| } |
| |
| /* Initialize termios settings. */ |
| static void termio_init(struct options *op, struct termios *tp) |
| { |
| speed_t ispeed, ospeed; |
| struct winsize ws; |
| #ifdef USE_PLYMOUTH_SUPPORT |
| struct termios lock; |
| int i = (plymouth_command(MAGIC_PING) == 0) ? PLYMOUTH_TERMIOS_FLAGS_DELAY : 0; |
| if (i) |
| plymouth_command(MAGIC_QUIT); |
| while (i-- > 0) { |
| /* |
| * Even with TTYReset=no it seems with systemd or plymouth |
| * the termios flags become changed from under the first |
| * agetty on a serial system console as the flags are locked. |
| */ |
| memset(&lock, 0, sizeof(struct termios)); |
| if (ioctl(STDIN_FILENO, TIOCGLCKTRMIOS, &lock) < 0) |
| break; |
| if (!lock.c_iflag && !lock.c_oflag && !lock.c_cflag && !lock.c_lflag) |
| break; |
| debug("termios locked\n"); |
| sleep(1); |
| } |
| memset(&lock, 0, sizeof(struct termios)); |
| ioctl(STDIN_FILENO, TIOCSLCKTRMIOS, &lock); |
| #endif |
| |
| if (op->flags & F_VCONSOLE) { |
| #if defined(IUTF8) && defined(KDGKBMODE) |
| switch(op->kbmode) { |
| case K_UNICODE: |
| setlocale(LC_CTYPE, "C.UTF-8"); |
| op->flags |= F_UTF8; |
| break; |
| case K_RAW: |
| case K_MEDIUMRAW: |
| case K_XLATE: |
| default: |
| setlocale(LC_CTYPE, "POSIX"); |
| op->flags &= ~F_UTF8; |
| break; |
| } |
| #else |
| setlocale(LC_CTYPE, "POSIX"); |
| op->flags &= ~F_UTF8; |
| #endif |
| reset_vc(op, tp); |
| |
| if ((tp->c_cflag & (CS8|PARODD|PARENB)) == CS8) |
| op->flags |= F_EIGHTBITS; |
| |
| if ((op->flags & F_NOCLEAR) == 0) |
| termio_clear(STDOUT_FILENO); |
| return; |
| } |
| |
| /* |
| * Serial line |
| */ |
| |
| if (op->flags & F_KEEPSPEED || !op->numspeed) { |
| /* Save the original setting. */ |
| ispeed = cfgetispeed(tp); |
| ospeed = cfgetospeed(tp); |
| |
| if (!ispeed) ispeed = TTYDEF_SPEED; |
| if (!ospeed) ospeed = TTYDEF_SPEED; |
| |
| } else { |
| ospeed = ispeed = op->speeds[FIRST_SPEED]; |
| } |
| |
| /* |
| * Initial termios settings: 8-bit characters, raw-mode, blocking i/o. |
| * Special characters are set after we have read the login name; all |
| * reads will be done in raw mode anyway. Errors will be dealt with |
| * later on. |
| */ |
| |
| /* The defaul is set c_iflag in termio_final() according to chardata. |
| * Unfortunately, the chardata are not set according to the serial line |
| * if --autolog is enabled. In this case we do not read from the line |
| * at all. The best what we can do in this case is to keep c_iflag |
| * unmodified for --autolog. |
| */ |
| if (!op->autolog) { |
| #ifdef IUTF8 |
| tp->c_iflag = tp->c_iflag & IUTF8; |
| if (tp->c_iflag & IUTF8) |
| op->flags |= F_UTF8; |
| #else |
| tp->c_iflag = 0; |
| #endif |
| } |
| |
| tp->c_lflag = 0; |
| tp->c_oflag &= OPOST | ONLCR; |
| |
| if ((op->flags & F_KEEPCFLAGS) == 0) |
| tp->c_cflag = CS8 | HUPCL | CREAD | (tp->c_cflag & CLOCAL); |
| |
| /* |
| * Note that the speed is stored in the c_cflag termios field, so we have |
| * set the speed always when the cflag is reset. |
| */ |
| cfsetispeed(tp, ispeed); |
| cfsetospeed(tp, ospeed); |
| |
| /* The default is to follow setting from kernel, but it's possible |
| * to explicitly remove/add CLOCAL flag by -L[=<mode>]*/ |
| switch (op->clocal) { |
| case CLOCAL_MODE_ALWAYS: |
| tp->c_cflag |= CLOCAL; /* -L or -L=always */ |
| break; |
| case CLOCAL_MODE_NEVER: |
| tp->c_cflag &= ~CLOCAL; /* -L=never */ |
| break; |
| case CLOCAL_MODE_AUTO: /* -L=auto */ |
| break; |
| } |
| |
| #ifdef HAVE_STRUCT_TERMIOS_C_LINE |
| tp->c_line = 0; |
| #endif |
| tp->c_cc[VMIN] = 1; |
| tp->c_cc[VTIME] = 0; |
| |
| /* Check for terminal size and if not found set default */ |
| if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) { |
| if (ws.ws_row == 0) |
| ws.ws_row = 24; |
| if (ws.ws_col == 0) |
| ws.ws_col = 80; |
| if (ioctl(STDIN_FILENO, TIOCSWINSZ, &ws)) |
| debug("TIOCSWINSZ ioctl failed\n"); |
| } |
| |
| /* Optionally enable hardware flow control. */ |
| #ifdef CRTSCTS |
| if (op->flags & F_RTSCTS) |
| tp->c_cflag |= CRTSCTS; |
| #endif |
| /* Flush input and output queues, important for modems! */ |
| tcflush(STDIN_FILENO, TCIOFLUSH); |
| |
| if (tcsetattr(STDIN_FILENO, TCSANOW, tp)) |
| log_warn(_("setting terminal attributes failed: %m")); |
| |
| /* Go to blocking input even in local mode. */ |
| fcntl(STDIN_FILENO, F_SETFL, |
| fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK); |
| |
| debug("term_io 2\n"); |
| } |
| |
| /* Reset virtual console on stdin to its defaults */ |
| static void reset_vc(const struct options *op, struct termios *tp) |
| { |
| int fl = 0; |
| |
| fl |= (op->flags & F_KEEPCFLAGS) == 0 ? 0 : UL_TTY_KEEPCFLAGS; |
| fl |= (op->flags & F_UTF8) == 0 ? 0 : UL_TTY_UTF8; |
| |
| reset_virtual_console(tp, fl); |
| |
| if (tcsetattr(STDIN_FILENO, TCSADRAIN, tp)) |
| log_warn(_("setting terminal attributes failed: %m")); |
| |
| /* Go to blocking input even in local mode. */ |
| fcntl(STDIN_FILENO, F_SETFL, |
| fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK); |
| } |
| |
| /* Extract baud rate from modem status message. */ |
| static void auto_baud(struct termios *tp) |
| { |
| speed_t speed; |
| int vmin; |
| unsigned iflag; |
| char buf[BUFSIZ]; |
| char *bp; |
| int nread; |
| |
| /* |
| * This works only if the modem produces its status code AFTER raising |
| * the DCD line, and if the computer is fast enough to set the proper |
| * baud rate before the message has gone by. We expect a message of the |
| * following format: |
| * |
| * <junk><number><junk> |
| * |
| * The number is interpreted as the baud rate of the incoming call. If the |
| * modem does not tell us the baud rate within one second, we will keep |
| * using the current baud rate. It is advisable to enable BREAK |
| * processing (comma-separated list of baud rates) if the processing of |
| * modem status messages is enabled. |
| */ |
| |
| /* |
| * Use 7-bit characters, don't block if input queue is empty. Errors will |
| * be dealt with later on. |
| */ |
| iflag = tp->c_iflag; |
| /* Enable 8th-bit stripping. */ |
| tp->c_iflag |= ISTRIP; |
| vmin = tp->c_cc[VMIN]; |
| /* Do not block when queue is empty. */ |
| tp->c_cc[VMIN] = 0; |
| tcsetattr(STDIN_FILENO, TCSANOW, tp); |
| |
| /* |
| * Wait for a while, then read everything the modem has said so far and |
| * try to extract the speed of the dial-in call. |
| */ |
| sleep(1); |
| if ((nread = read(STDIN_FILENO, buf, sizeof(buf) - 1)) > 0) { |
| buf[nread] = '\0'; |
| for (bp = buf; bp < buf + nread; bp++) |
| if (isascii(*bp) && isdigit(*bp)) { |
| if ((speed = bcode(bp))) { |
| cfsetispeed(tp, speed); |
| cfsetospeed(tp, speed); |
| } |
| break; |
| } |
| } |
| |
| /* Restore terminal settings. Errors will be dealt with later on. */ |
| tp->c_iflag = iflag; |
| tp->c_cc[VMIN] = vmin; |
| tcsetattr(STDIN_FILENO, TCSANOW, tp); |
| } |
| |
| static char *xgethostname(void) |
| { |
| char *name; |
| size_t sz = get_hostname_max() + 1; |
| |
| name = malloc(sizeof(char) * sz); |
| if (!name) |
| log_err(_("failed to allocate memory: %m")); |
| |
| if (gethostname(name, sz) != 0) { |
| free(name); |
| return NULL; |
| } |
| name[sz - 1] = '\0'; |
| return name; |
| } |
| |
| static char *xgetdomainname(void) |
| { |
| #ifdef HAVE_GETDOMAINNAME |
| char *name; |
| const size_t sz = get_hostname_max() + 1; |
| |
| name = malloc(sizeof(char) * sz); |
| if (!name) |
| log_err(_("failed to allocate memory: %m")); |
| |
| if (getdomainname(name, sz) != 0) { |
| free(name); |
| return NULL; |
| } |
| name[sz - 1] = '\0'; |
| return name; |
| #else |
| return NULL; |
| #endif |
| } |
| |
| |
| static char *read_os_release(struct options *op, const char *varname) |
| { |
| int fd = -1; |
| struct stat st; |
| size_t varsz = strlen(varname); |
| char *p, *buf = NULL, *ret = NULL; |
| |
| /* read the file only once */ |
| if (!op->osrelease) { |
| fd = open(_PATH_OS_RELEASE_ETC, O_RDONLY); |
| if (fd == -1) { |
| fd = open(_PATH_OS_RELEASE_USR, O_RDONLY); |
| if (fd == -1) { |
| log_warn(_("cannot open os-release file")); |
| return NULL; |
| } |
| } |
| |
| if (fstat(fd, &st) < 0 || st.st_size > 4 * 1024 * 1024) |
| goto done; |
| |
| op->osrelease = malloc(st.st_size + 1); |
| if (!op->osrelease) |
| log_err(_("failed to allocate memory: %m")); |
| if (read_all(fd, op->osrelease, st.st_size) != (ssize_t) st.st_size) { |
| free(op->osrelease); |
| op->osrelease = NULL; |
| goto done; |
| } |
| op->osrelease[st.st_size] = 0; |
| } |
| buf = strdup(op->osrelease); |
| if (!buf) |
| log_err(_("failed to allocate memory: %m")); |
| p = buf; |
| |
| for (;;) { |
| char *eol, *eon; |
| |
| p += strspn(p, "\n\r"); |
| p += strspn(p, " \t\n\r"); |
| if (!*p) |
| break; |
| if (strspn(p, "#;\n") != 0) { |
| p += strcspn(p, "\n\r"); |
| continue; |
| } |
| if (strncmp(p, varname, varsz) != 0) { |
| p += strcspn(p, "\n\r"); |
| continue; |
| } |
| p += varsz; |
| p += strspn(p, " \t\n\r"); |
| |
| if (*p != '=') |
| continue; |
| |
| p += strspn(p, " \t\n\r=\""); |
| eol = p + strcspn(p, "\n\r"); |
| *eol = '\0'; |
| eon = eol-1; |
| while (eon > p) { |
| if (*eon == '\t' || *eon == ' ') { |
| eon--; |
| continue; |
| } |
| if (*eon == '"') { |
| *eon = '\0'; |
| break; |
| } |
| break; |
| } |
| free(ret); |
| ret = strdup(p); |
| if (!ret) |
| log_err(_("failed to allocate memory: %m")); |
| p = eol + 1; |
| } |
| done: |
| free(buf); |
| if (fd >= 0) |
| close(fd); |
| return ret; |
| } |
| |
| #ifdef AGETTY_RELOAD |
| static void open_netlink(void) |
| { |
| struct sockaddr_nl addr = { 0, }; |
| int sock; |
| |
| if (netlink_fd != AGETTY_RELOAD_FDNONE) |
| return; |
| |
| sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
| if (sock >= 0) { |
| addr.nl_family = AF_NETLINK; |
| addr.nl_pid = getpid(); |
| addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR; |
| if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) |
| close(sock); |
| else |
| netlink_fd = sock; |
| } |
| } |
| |
| static int process_netlink_msg(int *changed) |
| { |
| char buf[4096]; |
| struct sockaddr_nl snl; |
| struct nlmsghdr *h; |
| int rc; |
| |
| struct iovec iov = { |
| .iov_base = buf, |
| .iov_len = sizeof(buf) |
| }; |
| struct msghdr msg = { |
| .msg_name = &snl, |
| .msg_namelen = sizeof(snl), |
| .msg_iov = &iov, |
| .msg_iovlen = 1, |
| .msg_control = NULL, |
| .msg_controllen = 0, |
| .msg_flags = 0 |
| }; |
| |
| rc = recvmsg(netlink_fd, &msg, MSG_DONTWAIT); |
| if (rc < 0) { |
| if (errno == EWOULDBLOCK || errno == EAGAIN) |
| return 0; |
| |
| /* Failure, just stop listening for changes */ |
| close(netlink_fd); |
| netlink_fd = AGETTY_RELOAD_FDNONE; |
| return 0; |
| } |
| |
| for (h = (struct nlmsghdr *)buf; NLMSG_OK(h, (unsigned int)rc); h = NLMSG_NEXT(h, rc)) { |
| if (h->nlmsg_type == NLMSG_DONE || |
| h->nlmsg_type == NLMSG_ERROR) { |
| close(netlink_fd); |
| netlink_fd = AGETTY_RELOAD_FDNONE; |
| return 0; |
| } |
| |
| *changed = 1; |
| break; |
| } |
| |
| return 1; |
| } |
| |
| static int process_netlink(void) |
| { |
| int changed = 0; |
| while (process_netlink_msg(&changed)); |
| return changed; |
| } |
| |
| static int wait_for_term_input(int fd) |
| { |
| char buffer[sizeof(struct inotify_event) + NAME_MAX + 1]; |
| fd_set rfds; |
| |
| if (inotify_fd == AGETTY_RELOAD_FDNONE) { |
| /* make sure the reload trigger file exists */ |
| int reload_fd = open(AGETTY_RELOAD_FILENAME, |
| O_CREAT|O_CLOEXEC|O_RDONLY, |
| S_IRUSR|S_IWUSR); |
| |
| /* initialize reload trigger inotify stuff */ |
| if (reload_fd >= 0) { |
| inotify_fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC); |
| if (inotify_fd > 0) |
| inotify_add_watch(inotify_fd, AGETTY_RELOAD_FILENAME, |
| IN_ATTRIB | IN_MODIFY); |
| |
| close(reload_fd); |
| } else |
| log_warn(_("failed to create reload file: %s: %m"), |
| AGETTY_RELOAD_FILENAME); |
| } |
| |
| while (1) { |
| int nfds = fd; |
| |
| FD_ZERO(&rfds); |
| FD_SET(fd, &rfds); |
| |
| if (inotify_fd >= 0) { |
| FD_SET(inotify_fd, &rfds); |
| nfds = max(nfds, inotify_fd); |
| } |
| if (netlink_fd >= 0) { |
| FD_SET(netlink_fd, &rfds); |
| nfds = max(nfds, netlink_fd); |
| } |
| |
| /* If waiting fails, just fall through, presumably reading input will fail */ |
| if (select(nfds + 1, &rfds, NULL, NULL, NULL) < 0) |
| return 1; |
| |
| if (FD_ISSET(fd, &rfds)) { |
| return 1; |
| |
| } else if (netlink_fd >= 0 && FD_ISSET(netlink_fd, &rfds)) { |
| if (!process_netlink()) |
| continue; |
| |
| /* Just drain the inotify buffer */ |
| } else if (inotify_fd >= 0 && FD_ISSET(inotify_fd, &rfds)) { |
| while (read(inotify_fd, buffer, sizeof (buffer)) > 0); |
| } |
| |
| return 0; |
| } |
| } |
| #endif /* AGETTY_RELOAD */ |
| |
| #ifdef ISSUEDIR_SUPPORT |
| static int issuedir_filter(const struct dirent *d) |
| { |
| size_t namesz; |
| |
| #ifdef _DIRENT_HAVE_D_TYPE |
| if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG && |
| d->d_type != DT_LNK) |
| return 0; |
| #endif |
| if (*d->d_name == '.') |
| return 0; |
| |
| namesz = strlen(d->d_name); |
| if (!namesz || namesz < ISSUEDIR_EXTSIZ + 1 || |
| strcmp(d->d_name + (namesz - ISSUEDIR_EXTSIZ), ISSUEDIR_EXT)) |
| return 0; |
| |
| /* Accept this */ |
| return 1; |
| } |
| |
| static FILE *issuedir_next_file(int dd, struct dirent **namelist, int nfiles, int *n) |
| { |
| while (*n < nfiles) { |
| struct dirent *d = namelist[*n]; |
| struct stat st; |
| FILE *f; |
| |
| (*n)++; |
| |
| if (fstatat(dd, d->d_name, &st, 0) || |
| !S_ISREG(st.st_mode)) |
| continue; |
| |
| f = fopen_at(dd, d->d_name, O_RDONLY|O_CLOEXEC, "r" UL_CLOEXECSTR); |
| if (f) |
| return f; |
| } |
| return NULL; |
| } |
| |
| #endif /* ISSUEDIR_SUPPORT */ |
| |
| #ifndef ISSUE_SUPPORT |
| static void print_issue_file(struct options *op, struct termios *tp __attribute__((__unused__))) |
| { |
| if ((op->flags & F_NONL) == 0) { |
| /* Issue not in use, start with a new line. */ |
| write_all(STDOUT_FILENO, "\r\n", 2); |
| } |
| } |
| #else /* ISSUE_SUPPORT */ |
| |
| static void print_issue_file(struct options *op, struct termios *tp) |
| { |
| const char *filename, *dirname = NULL; |
| FILE *f = NULL; |
| #ifdef ISSUEDIR_SUPPORT |
| int dd = -1, nfiles = 0, i; |
| struct dirent **namelist = NULL; |
| #endif |
| if ((op->flags & F_NONL) == 0) { |
| /* Issue not in use, start with a new line. */ |
| write_all(STDOUT_FILENO, "\r\n", 2); |
| } |
| |
| if (!(op->flags & F_ISSUE)) |
| return; |
| |
| /* |
| * The custom issue file or directory specified by: agetty -f <path>. |
| * Note that nothing is printed if the file/dir does not exist. |
| */ |
| filename = op->issue; |
| if (filename) { |
| struct stat st; |
| |
| if (stat(filename, &st) < 0) |
| return; |
| if (S_ISDIR(st.st_mode)) { |
| dirname = filename; |
| filename = NULL; |
| } |
| } else { |
| /* The default /etc/issue and optional /etc/issue.d directory |
| * as extension to the file. The /etc/issue.d directory is |
| * ignored if there is no /etc/issue file. The file may be |
| * empty or symlink. |
| */ |
| if (access(_PATH_ISSUE, F_OK|R_OK) != 0) |
| return; |
| filename = _PATH_ISSUE; |
| dirname = _PATH_ISSUEDIR; |
| } |
| |
| #ifdef ISSUEDIR_SUPPORT |
| if (dirname) { |
| dd = open(dirname, O_RDONLY|O_CLOEXEC|O_DIRECTORY); |
| if (dd >= 0) |
| nfiles = scandirat(dd, ".", &namelist, issuedir_filter, versionsort); |
| if (nfiles <= 0) |
| dirname = NULL; |
| } |
| i = 0; |
| #endif |
| if (filename) |
| f = fopen(filename, "r"); |
| |
| if (f || dirname) { |
| int c, oflag = tp->c_oflag; /* Save current setting. */ |
| |
| if ((op->flags & F_VCONSOLE) == 0) { |
| /* Map new line in output to carriage return & new line. */ |
| tp->c_oflag |= (ONLCR | OPOST); |
| tcsetattr(STDIN_FILENO, TCSADRAIN, tp); |
| } |
| |
| do { |
| #ifdef ISSUEDIR_SUPPORT |
| if (!f && i < nfiles) |
| f = issuedir_next_file(dd, namelist, nfiles, &i); |
| #endif |
| if (!f) |
| break; |
| while ((c = getc(f)) != EOF) { |
| if (c == '\\') |
| output_special_char(getc(f), op, tp, f); |
| else |
| putchar(c); |
| } |
| fclose(f); |
| f = NULL; |
| } while (dirname); |
| |
| fflush(stdout); |
| |
| if ((op->flags & F_VCONSOLE) == 0) { |
| /* Restore settings. */ |
| tp->c_oflag = oflag; |
| /* Wait till output is gone. */ |
| tcsetattr(STDIN_FILENO, TCSADRAIN, tp); |
| } |
| } |
| |
| #ifdef ISSUEDIR_SUPPORT |
| for (i = 0; i < nfiles; i++) |
| free(namelist[i]); |
| free(namelist); |
| if (dd >= 0) |
| close(dd); |
| #endif |
| } |
| #endif /* ISSUE_SUPPORT */ |
| |
| /* Show login prompt, optionally preceded by /etc/issue contents. */ |
| static void do_prompt(struct options *op, struct termios *tp) |
| { |
| #ifdef AGETTY_RELOAD |
| again: |
| #endif |
| print_issue_file(op, tp); |
| |
| if (op->flags & F_LOGINPAUSE) { |
| puts(_("[press ENTER to login]")); |
| #ifdef AGETTY_RELOAD |
| if (!wait_for_term_input(STDIN_FILENO)) { |
| /* reload issue */ |
| if (op->flags & F_VCONSOLE) |
| termio_clear(STDOUT_FILENO); |
| goto again; |
| } |
| #endif |
| getc(stdin); |
| } |
| #ifdef KDGKBLED |
| if (!(op->flags & F_NOHINTS) && !op->autolog && |
| (op->flags & F_VCONSOLE)) { |
| int kb = 0; |
| |
| if (ioctl(STDIN_FILENO, KDGKBLED, &kb) == 0) { |
| char hint[256] = { '\0' }; |
| int nl = 0; |
| |
| if (access(_PATH_NUMLOCK_ON, F_OK) == 0) |
| nl = 1; |
| |
| if (nl && (kb & 0x02) == 0) |
| append(hint, sizeof(hint), NULL, _("Num Lock off")); |
| |
| else if (nl == 0 && (kb & 2) && (kb & 0x20) == 0) |
| append(hint, sizeof(hint), NULL, _("Num Lock on")); |
| |
| if ((kb & 0x04) && (kb & 0x40) == 0) |
| append(hint, sizeof(hint), ", ", _("Caps Lock on")); |
| |
| if ((kb & 0x01) && (kb & 0x10) == 0) |
| append(hint, sizeof(hint), ", ", _("Scroll Lock on")); |
| |
| if (*hint) |
| printf(_("Hint: %s\n\n"), hint); |
| } |
| } |
| #endif /* KDGKBLED */ |
| if ((op->flags & F_NOHOSTNAME) == 0) { |
| char *hn = xgethostname(); |
| |
| if (hn) { |
| char *dot = strchr(hn, '.'); |
| char *cn = hn; |
| struct addrinfo *res = NULL; |
| |
| if ((op->flags & F_LONGHNAME) == 0) { |
| if (dot) |
| *dot = '\0'; |
| |
| } else if (dot == NULL) { |
| struct addrinfo hints; |
| |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_flags = AI_CANONNAME; |
| |
| if (!getaddrinfo(hn, NULL, &hints, &res) |
| && res && res->ai_canonname) |
| cn = res->ai_canonname; |
| } |
| |
| write_all(STDOUT_FILENO, cn, strlen(cn)); |
| write_all(STDOUT_FILENO, " ", 1); |
| |
| if (res) |
| freeaddrinfo(res); |
| free(hn); |
| } |
| } |
| if (!op->autolog) { |
| /* Always show login prompt. */ |
| write_all(STDOUT_FILENO, LOGIN, sizeof(LOGIN) - 1); |
| } |
| } |
| |
| /* Select next baud rate. */ |
| static void next_speed(struct options *op, struct termios *tp) |
| { |
| static int baud_index = -1; |
| |
| if (baud_index == -1) |
| /* |
| * If the F_KEEPSPEED flags is set then the FIRST_SPEED is not |
| * tested yet (see termio_init()). |
| */ |
| baud_index = |
| (op->flags & F_KEEPSPEED) ? FIRST_SPEED : 1 % op->numspeed; |
| else |
| baud_index = (baud_index + 1) % op->numspeed; |
| |
| cfsetispeed(tp, op->speeds[baud_index]); |
| cfsetospeed(tp, op->speeds[baud_index]); |
| tcsetattr(STDIN_FILENO, TCSANOW, tp); |
| } |
| |
| /* Get user name, establish parity, speed, erase, kill & eol. */ |
| static char *get_logname(struct options *op, struct termios *tp, struct chardata *cp) |
| { |
| static char logname[BUFSIZ]; |
| char *bp; |
| char c; /* input character, full eight bits */ |
| char ascval; /* low 7 bits of input character */ |
| int eightbit; |
| static char *erase[] = { /* backspace-space-backspace */ |
| "\010\040\010", /* space parity */ |
| "\010\040\010", /* odd parity */ |
| "\210\240\210", /* even parity */ |
| "\210\240\210", /* no parity */ |
| }; |
| |
| /* Initialize kill, erase, parity etc. (also after switching speeds). */ |
| INIT_CHARDATA(cp); |
| |
| /* |
| * Flush pending input (especially important after parsing or switching |
| * the baud rate). |
| */ |
| if ((op->flags & F_VCONSOLE) == 0) |
| sleep(1); |
| tcflush(STDIN_FILENO, TCIFLUSH); |
| |
| eightbit = (op->flags & F_EIGHTBITS); |
| bp = logname; |
| *bp = '\0'; |
| |
| while (*logname == '\0') { |
| /* Write issue file and prompt */ |
| do_prompt(op, tp); |
| |
| #ifdef AGETTY_RELOAD |
| if (!wait_for_term_input(STDIN_FILENO)) { |
| /* refresh prompt -- discard input data, clear terminal |
| * and call do_prompt() again |
| */ |
| if ((op->flags & F_VCONSOLE) == 0) |
| sleep(1); |
| tcflush(STDIN_FILENO, TCIFLUSH); |
| if (op->flags & F_VCONSOLE) |
| termio_clear(STDOUT_FILENO); |
| bp = logname; |
| *bp = '\0'; |
| continue; |
| } |
| #endif |
| cp->eol = '\0'; |
| |
| /* Read name, watch for break and end-of-line. */ |
| while (cp->eol == '\0') { |
| |
| char key; |
| ssize_t readres; |
| |
| debug("read from FD\n"); |
| readres = read(STDIN_FILENO, &c, 1); |
| if (readres < 0) { |
| debug("read failed\n"); |
| |
| /* The terminal could be open with O_NONBLOCK when |
| * -L (force CLOCAL) is specified... */ |
| if (errno == EINTR || errno == EAGAIN) { |
| xusleep(250000); |
| continue; |
| } |
| switch (errno) { |
| case 0: |
| case EIO: |
| case ESRCH: |
| case EINVAL: |
| case ENOENT: |
| exit_slowly(EXIT_SUCCESS); |
| default: |
| log_err(_("%s: read: %m"), op->tty); |
| } |
| } |
| |
| if (readres == 0) |
| c = 0; |
| |
| /* Do parity bit handling. */ |
| if (eightbit) |
| ascval = c; |
| else if (c != (ascval = (c & 0177))) { |
| uint32_t bits; /* # of "1" bits per character */ |
| uint32_t mask; /* mask with 1 bit up */ |
| for (bits = 1, mask = 1; mask & 0177; mask <<= 1) { |
| if (mask & ascval) |
| bits++; |
| } |
| cp->parity |= ((bits & 1) ? 1 : 2); |
| } |
| |
| if (op->killchars && strchr(op->killchars, ascval)) |
| key = CTL('U'); |
| else if (op->erasechars && strchr(op->erasechars, ascval)) |
| key = DEL; |
| else |
| key = ascval; |
| |
| /* Do erase, kill and end-of-line processing. */ |
| switch (key) { |
| case 0: |
| *bp = 0; |
| if (op->numspeed > 1 && !(op->flags & F_VCONSOLE)) |
| return NULL; |
| if (readres == 0) |
| exit_slowly(EXIT_SUCCESS); |
| break; |
| case CR: |
| case NL: |
| *bp = 0; /* terminate logname */ |
| cp->eol = ascval; /* set end-of-line char */ |
| break; |
| case BS: |
| case DEL: |
| cp->erase = ascval; /* set erase character */ |
| if (bp > logname) { |
| if ((tp->c_lflag & ECHO) == 0) |
| write_all(1, erase[cp->parity], 3); |
| bp--; |
| } |
| break; |
| case CTL('U'): |
| cp->kill = ascval; /* set kill character */ |
| while (bp > logname) { |
| if ((tp->c_lflag & ECHO) == 0) |
| write_all(1, erase[cp->parity], 3); |
| bp--; |
| } |
| break; |
| case CTL('D'): |
| exit(EXIT_SUCCESS); |
| default: |
| if (!isascii(ascval) || !isprint(ascval)) |
| break; |
| if ((size_t)(bp - logname) >= sizeof(logname) - 1) |
| log_err(_("%s: input overrun"), op->tty); |
| if ((tp->c_lflag & ECHO) == 0) |
| write_all(1, &c, 1); /* echo the character */ |
| *bp++ = ascval; /* and store it */ |
| break; |
| } |
| } |
| } |
| |
| #ifdef HAVE_WIDECHAR |
| if ((op->flags & (F_EIGHTBITS|F_UTF8)) == (F_EIGHTBITS|F_UTF8)) { |
| /* Check out UTF-8 multibyte characters */ |
| ssize_t len; |
| wchar_t *wcs, *wcp; |
| |
| len = mbstowcs((wchar_t *)0, logname, 0); |
| if (len < 0) |
| log_err(_("%s: invalid character conversion for login name"), op->tty); |
| |
| wcs = malloc((len + 1) * sizeof(wchar_t)); |
| if (!wcs) |
| log_err(_("failed to allocate memory: %m")); |
| |
| len = mbstowcs(wcs, logname, len + 1); |
| if (len < 0) |
| log_err(_("%s: invalid character conversion for login name"), op->tty); |
| |
| wcp = wcs; |
| while (*wcp) { |
| const wint_t wc = *wcp++; |
| if (!iswprint(wc)) |
| log_err(_("%s: invalid character 0x%x in login name"), op->tty, wc); |
| } |
| free(wcs); |
| } else |
| #endif |
| if ((op->flags & F_LCUC) && (cp->capslock = caps_lock(logname))) { |
| |
| /* Handle names with upper case and no lower case. */ |
| for (bp = logname; *bp; bp++) |
| if (isupper(*bp)) |
| *bp = tolower(*bp); /* map name to lower case */ |
| } |
| |
| return logname; |
| } |
| |
| /* Set the final tty mode bits. */ |
| static void termio_final(struct options *op, struct termios *tp, struct chardata *cp) |
| { |
| /* General terminal-independent stuff. */ |
| |
| /* 2-way flow control */ |
| tp->c_iflag |= IXON | IXOFF; |
| tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE; |
| /* no longer| ECHOCTL | ECHOPRT */ |
| tp->c_oflag |= OPOST; |
| /* tp->c_cflag = 0; */ |
| tp->c_cc[VINTR] = DEF_INTR; |
| tp->c_cc[VQUIT] = DEF_QUIT; |
| tp->c_cc[VEOF] = DEF_EOF; |
| tp->c_cc[VEOL] = DEF_EOL; |
| #ifdef __linux__ |
| tp->c_cc[VSWTC] = DEF_SWITCH; |
| #elif defined(VSWTCH) |
| tp->c_cc[VSWTCH] = DEF_SWITCH; |
| #endif /* __linux__ */ |
| |
| /* Account for special characters seen in input. */ |
| if (cp->eol == CR) { |
| tp->c_iflag |= ICRNL; |
| tp->c_oflag |= ONLCR; |
| } |
| tp->c_cc[VERASE] = cp->erase; |
| tp->c_cc[VKILL] = cp->kill; |
| |
| /* Account for the presence or absence of parity bits in input. */ |
| switch (cp->parity) { |
| case 0: |
| /* space (always 0) parity */ |
| break; |
| case 1: |
| /* odd parity */ |
| tp->c_cflag |= PARODD; |
| /* fallthrough */ |
| case 2: |
| /* even parity */ |
| tp->c_cflag |= PARENB; |
| tp->c_iflag |= INPCK | ISTRIP; |
| /* fallthrough */ |
| case (1 | 2): |
| /* no parity bit */ |
| tp->c_cflag &= ~CSIZE; |
| tp->c_cflag |= CS7; |
| break; |
| } |
| /* Account for upper case without lower case. */ |
| if (cp->capslock) { |
| #ifdef IUCLC |
| tp->c_iflag |= IUCLC; |
| #endif |
| #ifdef XCASE |
| tp->c_lflag |= XCASE; |
| #endif |
| #ifdef OLCUC |
| tp->c_oflag |= OLCUC; |
| #endif |
| } |
| /* Optionally enable hardware flow control. */ |
| #ifdef CRTSCTS |
| if (op->flags & F_RTSCTS) |
| tp->c_cflag |= CRTSCTS; |
| #endif |
| |
| /* Finally, make the new settings effective. */ |
| if (tcsetattr(STDIN_FILENO, TCSANOW, tp) < 0) |
| log_err(_("%s: failed to set terminal attributes: %m"), op->tty); |
| } |
| |
| /* |
| * String contains upper case without lower case. |
| * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=52940 |
| * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=156242 |
| */ |
| static int caps_lock(char *s) |
| { |
| int capslock; |
| |
| for (capslock = 0; *s; s++) { |
| if (islower(*s)) |
| return EXIT_SUCCESS; |
| if (capslock == 0) |
| capslock = isupper(*s); |
| } |
| return capslock; |
| } |
| |
| /* Convert speed string to speed code; return 0 on failure. */ |
| static speed_t bcode(char *s) |
| { |
| const struct Speedtab *sp; |
| long speed = atol(s); |
| |
| for (sp = speedtab; sp->speed; sp++) |
| if (sp->speed == speed) |
| return sp->code; |
| return 0; |
| } |
| |
| static void __attribute__((__noreturn__)) usage(void) |
| { |
| FILE *out = stdout; |
| |
| fputs(USAGE_HEADER, out); |
| fprintf(out, _(" %1$s [options] <line> [<baud_rate>,...] [<termtype>]\n" |
| " %1$s [options] <baud_rate>,... <line> [<termtype>]\n"), program_invocation_short_name); |
| |
| fputs(USAGE_SEPARATOR, out); |
| fputs(_("Open a terminal and set its mode.\n"), out); |
| |
| fputs(USAGE_OPTIONS, out); |
| fputs(_(" -8, --8bits assume 8-bit tty\n"), out); |
| fputs(_(" -a, --autologin <user> login the specified user automatically\n"), out); |
| fputs(_(" -c, --noreset do not reset control mode\n"), out); |
| fputs(_(" -E, --remote use -r <hostname> for login(1)\n"), out); |
| fputs(_(" -f, --issue-file <file> display issue file\n"), out); |
| fputs(_(" -h, --flow-control enable hardware flow control\n"), out); |
| fputs(_(" -H, --host <hostname> specify login host\n"), out); |
| fputs(_(" -i, --noissue do not display issue file\n"), out); |
| fputs(_(" -I, --init-string <string> set init string\n"), out); |
| fputs(_(" -J --noclear do not clear the screen before prompt\n"), out); |
| fputs(_(" -l, --login-program <file> specify login program\n"), out); |
| fputs(_(" -L, --local-line[=<mode>] control the local line flag\n"), out); |
| fputs(_(" -m, --extract-baud extract baud rate during connect\n"), out); |
| fputs(_(" -n, --skip-login do not prompt for login\n"), out); |
| fputs(_(" -N --nonewline do not print a newline before issue\n"), out); |
| fputs(_(" -o, --login-options <opts> options that are passed to login\n"), out); |
| fputs(_(" -p, --login-pause wait for any key before the login\n"), out); |
| fputs(_(" -r, --chroot <dir> change root to the directory\n"), out); |
| fputs(_(" -R, --hangup do virtually hangup on the tty\n"), out); |
| fputs(_(" -s, --keep-baud try to keep baud rate after break\n"), out); |
| fputs(_(" -t, --timeout <number> login process timeout\n"), out); |
| fputs(_(" -U, --detect-case detect uppercase terminal\n"), out); |
| fputs(_(" -w, --wait-cr wait carriage-return\n"), out); |
| fputs(_(" --nohints do not print hints\n"), out); |
| fputs(_(" --nohostname no hostname at all will be shown\n"), out); |
| fputs(_(" --long-hostname show full qualified hostname\n"), out); |
| fputs(_(" --erase-chars <string> additional backspace chars\n"), out); |
| fputs(_(" --kill-chars <string> additional kill chars\n"), out); |
| fputs(_(" --chdir <directory> chdir before the login\n"), out); |
| fputs(_(" --delay <number> sleep seconds before prompt\n"), out); |
| fputs(_(" --nice <number> run login with this priority\n"), out); |
| fputs(_(" --reload reload prompts on running agetty instances\n"), out); |
| fputs(_(" --list-speeds display supported baud rates\n"), out); |
| printf( " --help %s\n", USAGE_OPTSTR_HELP); |
| printf( " --version %s\n", USAGE_OPTSTR_VERSION); |
| printf(USAGE_MAN_TAIL("agetty(8)")); |
| |
| exit(EXIT_SUCCESS); |
| } |
| |
| static void list_speeds(void) |
| { |
| const struct Speedtab *sp; |
| |
| for (sp = speedtab; sp->speed; sp++) |
| printf("%10ld\n", sp->speed); |
| } |
| |
| /* |
| * Helper function reports errors to console or syslog. |
| * Will be used by log_err() and log_warn() therefore |
| * it takes a format as well as va_list. |
| */ |
| #define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2) |
| |
| static void dolog(int priority, const char *fmt, va_list ap) |
| { |
| #ifndef USE_SYSLOG |
| int fd; |
| #endif |
| char buf[BUFSIZ]; |
| char *bp; |
| |
| /* |
| * If the diagnostic is reported via syslog(3), the process name is |
| * automatically prepended to the message. If we write directly to |
| * /dev/console, we must prepend the process name ourselves. |
| */ |
| #ifdef USE_SYSLOG |
| buf[0] = '\0'; |
| bp = buf; |
| #else |
| str2cpy(buf, program_invocation_short_name, ": "); |
| bp = buf + strlen(buf); |
| #endif /* USE_SYSLOG */ |
| vsnprintf(bp, sizeof(buf)-strlen(buf), fmt, ap); |
| |
| /* |
| * Write the diagnostic directly to /dev/console if we do not use the |
| * syslog(3) facility. |
| */ |
| #ifdef USE_SYSLOG |
| openlog(program_invocation_short_name, LOG_PID, LOG_AUTHPRIV); |
| syslog(priority, "%s", buf); |
| closelog(); |
| #else |
| /* Terminate with CR-LF since the console mode is unknown. */ |
| strcat(bp, "\r\n"); |
| if ((fd = open("/dev/console", 1)) >= 0) { |
| write_all(fd, buf, strlen(buf)); |
| close(fd); |
| } |
| #endif /* USE_SYSLOG */ |
| } |
| |
| static void exit_slowly(int code) |
| { |
| /* Be kind to init(8). */ |
| sleep(10); |
| exit(code); |
| } |
| |
| static void log_err(const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| dolog(LOG_ERR, fmt, ap); |
| va_end(ap); |
| |
| exit_slowly(EXIT_FAILURE); |
| } |
| |
| static void log_warn(const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| dolog(LOG_WARNING, fmt, ap); |
| va_end(ap); |
| } |
| |
| static void print_addr(sa_family_t family, void *addr) |
| { |
| char buff[INET6_ADDRSTRLEN + 1]; |
| |
| inet_ntop(family, addr, buff, sizeof(buff)); |
| printf("%s", buff); |
| } |
| |
| /* |
| * Prints IP for the specified interface (@iface), if the interface is not |
| * specified then prints the "best" one (UP, RUNNING, non-LOOPBACK). If not |
| * found the "best" interface then prints at least host IP. |
| */ |
| static void output_iface_ip(struct ifaddrs *addrs, |
| const char *iface, |
| sa_family_t family) |
| { |
| struct ifaddrs *p; |
| struct addrinfo hints, *info = NULL; |
| char *host = NULL; |
| void *addr = NULL; |
| |
| if (!addrs) |
| return; |
| |
| for (p = addrs; p; p = p->ifa_next) { |
| |
| if (!p->ifa_name || |
| !p->ifa_addr || |
| p->ifa_addr->sa_family != family) |
| continue; |
| |
| if (iface) { |
| /* Filter out by interface name */ |
| if (strcmp(p->ifa_name, iface) != 0) |
| continue; |
| } else { |
| /* Select the "best" interface */ |
| if ((p->ifa_flags & IFF_LOOPBACK) || |
| !(p->ifa_flags & IFF_UP) || |
| !(p->ifa_flags & IFF_RUNNING)) |
| continue; |
| } |
| |
| addr = NULL; |
| switch (p->ifa_addr->sa_family) { |
| case AF_INET: |
| addr = &((struct sockaddr_in *) p->ifa_addr)->sin_addr; |
| break; |
| case AF_INET6: |
| addr = &((struct sockaddr_in6 *) p->ifa_addr)->sin6_addr; |
| break; |
| } |
| |
| if (addr) { |
| print_addr(family, addr); |
| return; |
| } |
| } |
| |
| if (iface) |
| return; |
| |
| /* Hmm.. not found the best interface, print host IP at least */ |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_family = family; |
| if (family == AF_INET6) |
| hints.ai_flags = AI_V4MAPPED; |
| |
| host = xgethostname(); |
| if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { |
| switch (info->ai_family) { |
| case AF_INET: |
| addr = &((struct sockaddr_in *) info->ai_addr)->sin_addr; |
| break; |
| case AF_INET6: |
| addr = &((struct sockaddr_in6 *) info->ai_addr)->sin6_addr; |
| break; |
| } |
| if (addr) |
| print_addr(family, addr); |
| |
| freeaddrinfo(info); |
| } |
| free(host); |
| } |
| |
| /* |
| * parses \x{argument}, if not argument specified then returns NULL, the @fd |
| * has to point to one char after the sequence (it means '{'). |
| */ |
| static char *get_escape_argument(FILE *fd, char *buf, size_t bufsz) |
| { |
| size_t i = 0; |
| int c = fgetc(fd); |
| |
| if (c == EOF || (unsigned char) c != '{') { |
| ungetc(c, fd); |
| return NULL; |
| } |
| |
| do { |
| c = fgetc(fd); |
| if (c == EOF) |
| return NULL; |
| if ((unsigned char) c != '}' && i < bufsz - 1) |
| buf[i++] = (unsigned char) c; |
| |
| } while ((unsigned char) c != '}'); |
| |
| buf[i] = '\0'; |
| return buf; |
| } |
| |
| static void output_special_char(unsigned char c, struct options *op, |
| struct termios *tp, FILE *fp) |
| { |
| struct utsname uts; |
| |
| switch (c) { |
| case 'e': |
| { |
| char escname[UL_COLORNAME_MAXSZ]; |
| |
| if (get_escape_argument(fp, escname, sizeof(escname))) { |
| const char *esc = color_sequence_from_colorname(escname); |
| if (esc) |
| fputs(esc, stdout); |
| } else |
| fputs("\033", stdout); |
| break; |
| } |
| case 's': |
| uname(&uts); |
| printf("%s", uts.sysname); |
| break; |
| case 'n': |
| uname(&uts); |
| printf("%s", uts.nodename); |
| break; |
| case 'r': |
| uname(&uts); |
| printf("%s", uts.release); |
| break; |
| case 'v': |
| uname(&uts); |
| printf("%s", uts.version); |
| break; |
| case 'm': |
| uname(&uts); |
| printf("%s", uts.machine); |
| break; |
| case 'o': |
| { |
| char *dom = xgetdomainname(); |
| |
| fputs(dom ? dom : "unknown_domain", stdout); |
| free(dom); |
| break; |
| } |
| case 'O': |
| { |
| char *dom = NULL; |
| char *host = xgethostname(); |
| struct addrinfo hints, *info = NULL; |
| |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_flags = AI_CANONNAME; |
| |
| if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { |
| char *canon; |
| |
| if (info->ai_canonname && |
| (canon = strchr(info->ai_canonname, '.'))) |
| dom = canon + 1; |
| } |
| fputs(dom ? dom : "unknown_domain", stdout); |
| if (info) |
| freeaddrinfo(info); |
| free(host); |
| break; |
| } |
| case 'd': |
| case 't': |
| { |
| time_t now; |
| struct tm *tm; |
| |
| time(&now); |
| tm = localtime(&now); |
| |
| if (!tm) |
| break; |
| |
| if (c == 'd') /* ISO 8601 */ |
| printf("%s %s %d %d", |
| nl_langinfo(ABDAY_1 + tm->tm_wday), |
| nl_langinfo(ABMON_1 + tm->tm_mon), |
| tm->tm_mday, |
| tm->tm_year < 70 ? tm->tm_year + 2000 : |
| tm->tm_year + 1900); |
| else |
| printf("%02d:%02d:%02d", |
| tm->tm_hour, tm->tm_min, tm->tm_sec); |
| break; |
| } |
| case 'l': |
| printf ("%s", op->tty); |
| break; |
| case 'b': |
| { |
| const speed_t speed = cfgetispeed(tp); |
| int i; |
| |
| for (i = 0; speedtab[i].speed; i++) { |
| if (speedtab[i].code == speed) { |
| printf("%ld", speedtab[i].speed); |
| break; |
| } |
| } |
| break; |
| } |
| case 'S': |
| { |
| char *var = NULL, varname[64]; |
| |
| /* \S{varname} */ |
| if (get_escape_argument(fp, varname, sizeof(varname))) { |
| var = read_os_release(op, varname); |
| if (var) { |
| if (strcmp(varname, "ANSI_COLOR") == 0) |
| printf("\033[%sm", var); |
| else |
| fputs(var, stdout); |
| } |
| /* \S */ |
| } else if ((var = read_os_release(op, "PRETTY_NAME"))) { |
| fputs(var, stdout); |
| |
| /* \S and PRETTY_NAME not found */ |
| } else { |
| uname(&uts); |
| fputs(uts.sysname, stdout); |
| } |
| |
| free(var); |
| |
| break; |
| } |
| case 'u': |
| case 'U': |
| { |
| int users = 0; |
| struct utmpx *ut; |
| setutxent(); |
| while ((ut = getutxent())) |
| if (ut->ut_type == USER_PROCESS) |
| users++; |
| endutxent(); |
| if (c == 'U') |
| printf(P_("%d user", "%d users", users), users); |
| else |
| printf ("%d ", users); |
| break; |
| } |
| case '4': |
| case '6': |
| { |
| sa_family_t family = c == '4' ? AF_INET : AF_INET6; |
| struct ifaddrs *addrs = NULL; |
| char iface[128]; |
| |
| #ifdef AGETTY_RELOAD |
| open_netlink(); |
| #endif |
| |
| if (getifaddrs(&addrs)) |
| break; |
| |
| if (get_escape_argument(fp, iface, sizeof(iface))) |
| output_iface_ip(addrs, iface, family); |
| else |
| output_iface_ip(addrs, NULL, family); |
| |
| freeifaddrs(addrs); |
| break; |
| } |
| default: |
| putchar(c); |
| break; |
| } |
| } |
| |
| static void init_special_char(char* arg, struct options *op) |
| { |
| char ch, *p, *q; |
| int i; |
| |
| op->initstring = malloc(strlen(arg) + 1); |
| if (!op->initstring) |
| log_err(_("failed to allocate memory: %m")); |
| |
| /* |
| * Copy optarg into op->initstring decoding \ddd octal |
| * codes into chars. |
| */ |
| q = op->initstring; |
| p = arg; |
| while (*p) { |
| /* The \\ is converted to \ */ |
| if (*p == '\\') { |
| p++; |
| if (*p == '\\') { |
| ch = '\\'; |
| p++; |
| } else { |
| /* Handle \000 - \177. */ |
| ch = 0; |
| for (i = 1; i <= 3; i++) { |
| if (*p >= '0' && *p <= '7') { |
| ch <<= 3; |
| ch += *p - '0'; |
| p++; |
| } else { |
| break; |
| } |
| } |
| } |
| *q++ = ch; |
| } else |
| *q++ = *p++; |
| } |
| *q = '\0'; |
| } |
| |
| /* |
| * Appends @str to @dest and if @dest is not empty then use @sep as a |
| * separator. The maximal final length of the @dest is @len. |
| * |
| * Returns the final @dest length or -1 in case of error. |
| */ |
| static ssize_t append(char *dest, size_t len, const char *sep, const char *src) |
| { |
| size_t dsz = 0, ssz = 0, sz; |
| char *p; |
| |
| if (!dest || !len || !src) |
| return -1; |
| |
| if (*dest) |
| dsz = strlen(dest); |
| if (dsz && sep) |
| ssz = strlen(sep); |
| sz = strlen(src); |
| |
| if (dsz + ssz + sz + 1 > len) |
| return -1; |
| |
| p = dest + dsz; |
| if (ssz) { |
| memcpy(p, sep, ssz); |
| p += ssz; |
| } |
| memcpy(p, src, sz); |
| *(p + sz) = '\0'; |
| |
| return dsz + ssz + sz; |
| } |
| |
| /* |
| * Do not allow the user to pass an option as a user name |
| * To be more safe: Use `--' to make sure the rest is |
| * interpreted as non-options by the program, if it supports it. |
| */ |
| static void check_username(const char* nm) |
| { |
| const char *p = nm; |
| if (!nm) |
| goto err; |
| if (strlen(nm) > 42) |
| goto err; |
| while (isspace(*p)) |
| p++; |
| if (*p == '-') |
| goto err; |
| return; |
| err: |
| errno = EPERM; |
| log_err(_("checkname failed: %m")); |
| } |
| |
| static void reload_agettys(void) |
| { |
| #ifdef AGETTY_RELOAD |
| int fd = open(AGETTY_RELOAD_FILENAME, O_CREAT|O_CLOEXEC|O_WRONLY, |
| S_IRUSR|S_IWUSR); |
| if (fd < 0) |
| err(EXIT_FAILURE, _("cannot open %s"), AGETTY_RELOAD_FILENAME); |
| |
| if (futimens(fd, NULL) < 0 || close(fd) < 0) |
| err(EXIT_FAILURE, _("cannot touch file %s"), |
| AGETTY_RELOAD_FILENAME); |
| #else |
| /* very unusual */ |
| errx(EXIT_FAILURE, _("--reload is unsupported on your system")); |
| #endif |
| } |