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-rw-r--r--term-utils/agetty.c3009
1 files changed, 3009 insertions, 0 deletions
diff --git a/term-utils/agetty.c b/term-utils/agetty.c
new file mode 100644
index 0000000..cecde2c
--- /dev/null
+++ b/term-utils/agetty.c
@@ -0,0 +1,3009 @@
+/*
+ * 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 "cctype.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
+
+#ifdef HAVE_GETTTYNAM
+# include <ttyent.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;
+static uint32_t netlink_groups;
+#endif
+
+struct issue {
+ FILE *output;
+ char *mem;
+ size_t mem_sz;
+
+#ifdef AGETTY_RELOAD
+ char *mem_old;
+#endif
+ unsigned int do_tcsetattr : 1,
+ do_tcrestore : 1;
+};
+
+/*
+ * 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 */
+ const char *tty; /* name of tty */
+ const 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 */
+ int tty_is_stdin; /* is the tty the standard input stream */
+ 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(const 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, int canon);
+static void auto_baud(struct termios *tp);
+static void list_speeds(void);
+static void output_special_char (struct issue *ie, unsigned char c, struct options *op,
+ struct termios *tp, FILE *fp);
+static void do_prompt(struct issue *ie, struct options *op, struct termios *tp);
+static void next_speed(struct options *op, struct termios *tp);
+static char *get_logname(struct issue *ie, 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 issue *ie, struct options *op, struct termios *tp);
+static void eval_issue_file(struct issue *ie, struct options *op, struct termios *tp);
+static void show_issue(struct options *op);
+
+
+/* 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 */
+ };
+ struct issue issue = {
+ .mem = NULL,
+ };
+ 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
+ {
+ int i;
+
+ dbf = fopen(DEBUG_OUTPUT, "w");
+ for (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 (options.flags & 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 */
+ eval_issue_file(&issue, &options, &termios);
+ print_issue_file(&issue, &options, &termios);
+ } else { /* regular (auto)login */
+ if (options.autolog) {
+ /* Autologin prompt */
+ eval_issue_file(&issue, &options, &termios);
+ do_prompt(&issue, &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(&issue, &options, &termios, &chardata)) == NULL)
+ if ((options.flags & F_VCONSOLE) == 0 && options.numspeed)
+ next_speed(&options, &termios);
+ }
+ }
+
+ /* Disable timer. */
+ if (options.timeout)
+ alarm(0);
+
+ /* Finalize the termios settings. */
+ if ((options.flags & F_VCONSOLE) == 0)
+ termio_final(&options, &termios, &chardata);
+ else
+ reset_vc(&options, &termios, 1);
+
+ /* 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) != 0) {
+ 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;
+ int opt_show_issue = 0;
+
+ 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,
+ ISSUE_SHOW_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' },
+ { "show-issue", no_argument, NULL, ISSUE_SHOW_OPTION },
+ { "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 ISSUE_SHOW_OPTION:
+ opt_show_issue = 1;
+ break;
+ case VERSION_OPTION:
+ output_version();
+ exit(EXIT_SUCCESS);
+ case HELP_OPTION:
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (opt_show_issue) {
+ show_issue(op);
+ exit(EXIT_SUCCESS);
+ }
+
+ 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++;
+ }
+ }
+ }
+
+ /* resolve the tty path in case it was provided as stdin */
+ if (strcmp(op->tty, "-") == 0) {
+ op->tty_is_stdin = 1;
+ int fd = get_terminal_name(NULL, &op->tty, NULL);
+ if (fd < 0) {
+ log_warn(_("could not get terminal name: %d"), fd);
+ }
+ }
+
+ /* 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);
+ const char *vcline = op->vcline;
+ const 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 */
+ str2memcpy(ut.ut_id, vcline, sizeof(ut.ut_id));
+ else {
+ size_t len = strlen(line);
+ const char * ptr;
+ if (len >= sizeof(ut.ut_id))
+ ptr = line + len - sizeof(ut.ut_id);
+ else
+ ptr = line;
+ str2memcpy(ut.ut_id, ptr, sizeof(ut.ut_id));
+ }
+ }
+
+ str2memcpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user));
+ str2memcpy(ut.ut_line, line, sizeof(ut.ut_line));
+ if (fakehost)
+ str2memcpy(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(const 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 (!op->tty_is_stdin) {
+ 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);
+
+#ifdef HAVE_GETTTYNAM
+ if (!op->term) {
+ struct ttyent *ent = getttynam(tty);
+ /* a bit nasty as it's never freed */
+ if (ent && ent->ty_type) {
+ op->term = strdup(ent->ty_type);
+ if (!op->term)
+ log_err(_("failed to allocate memory: %m"));
+ }
+ }
+#endif
+
+#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, 0);
+
+ 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);
+
+ /* Save also the original speed to array of the speeds to make
+ * it possible to return the original after unexpected BREAKs.
+ */
+ if (op->numspeed)
+ op->speeds[op->numspeed++] = ispeed ? ispeed :
+ ospeed ? ospeed :
+ TTYDEF_SPEED;
+ 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 default 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 canon)
+{
+ 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);
+
+#ifdef AGETTY_RELOAD
+ /*
+ * Discard all the flags that makes the line go canonical with echoing.
+ * We need to know when the user starts typing.
+ */
+ if (canon == 0)
+ tp->c_lflag = 0;
+#endif
+
+ 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 (c_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 = netlink_groups;
+ if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
+ close(sock);
+ else
+ netlink_fd = sock;
+ }
+}
+
+static int process_netlink_msg(int *triggered)
+{
+ 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;
+ }
+
+ *triggered = 1;
+ break;
+ }
+
+ return 1;
+}
+
+static int process_netlink(void)
+{
+ int triggered = 0;
+ while (process_netlink_msg(&triggered));
+ return triggered;
+}
+
+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;
+
+ }
+
+ 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) != 0)
+ return 0;
+
+ /* Accept this */
+ return 1;
+}
+
+
+static int issuefile_read_stream(struct issue *ie, FILE *f, struct options *op, struct termios *tp);
+
+/* returns: 0 on success, 1 cannot open, <0 on error
+ */
+static int issuedir_read(struct issue *ie, const char *dirname,
+ struct options *op, struct termios *tp)
+{
+ int dd, nfiles, i;
+ struct dirent **namelist = NULL;
+
+ dd = open(dirname, O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (dd < 0)
+ return 1;
+
+ nfiles = scandirat(dd, ".", &namelist, issuedir_filter, versionsort);
+ if (nfiles <= 0)
+ goto done;
+
+ ie->do_tcsetattr = 1;
+
+ for (i = 0; i < nfiles; i++) {
+ struct dirent *d = namelist[i];
+ FILE *f;
+
+ f = fopen_at(dd, d->d_name, O_RDONLY|O_CLOEXEC, "r" UL_CLOEXECSTR);
+ if (f) {
+ issuefile_read_stream(ie, f, op, tp);
+ fclose(f);
+ }
+ }
+
+ for (i = 0; i < nfiles; i++)
+ free(namelist[i]);
+ free(namelist);
+done:
+ close(dd);
+ return 0;
+}
+
+#else /* !ISSUEDIR_SUPPORT */
+static int issuedir_read(struct issue *ie __attribute__((__unused__)),
+ const char *dirname __attribute__((__unused__)),
+ struct options *op __attribute__((__unused__)),
+ struct termios *tp __attribute__((__unused__)))
+{
+ return 1;
+}
+#endif /* ISSUEDIR_SUPPORT */
+
+#ifndef ISSUE_SUPPORT
+static void print_issue_file(struct issue *ie __attribute__((__unused__)),
+ 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);
+ }
+}
+
+static void eval_issue_file(struct issue *ie __attribute__((__unused__)),
+ struct options *op __attribute__((__unused__)),
+ struct termios *tp __attribute__((__unused__)))
+{
+}
+
+static void show_issue(struct options *op __attribute__((__unused__)))
+{
+}
+
+#else /* ISSUE_SUPPORT */
+
+static int issuefile_read_stream(
+ struct issue *ie, FILE *f,
+ struct options *op, struct termios *tp)
+{
+ struct stat st;
+ int c;
+
+ if (fstat(fileno(f), &st) || !S_ISREG(st.st_mode))
+ return 1;
+
+ if (!ie->output) {
+ free(ie->mem);
+ ie->mem_sz = 0;
+ ie->mem = NULL;
+ ie->output = open_memstream(&ie->mem, &ie->mem_sz);
+ }
+
+ while ((c = getc(f)) != EOF) {
+ if (c == '\\')
+ output_special_char(ie, getc(f), op, tp, f);
+ else
+ putc(c, ie->output);
+ }
+
+ return 0;
+}
+
+static int issuefile_read(
+ struct issue *ie, const char *filename,
+ struct options *op, struct termios *tp)
+{
+ FILE *f = fopen(filename, "r" UL_CLOEXECSTR);
+ int rc = 1;
+
+ if (f) {
+ rc = issuefile_read_stream(ie, f, op, tp);
+ fclose(f);
+ }
+ return rc;
+}
+
+
+#ifdef AGETTY_RELOAD
+static int issue_is_changed(struct issue *ie)
+{
+ if (ie->mem_old && ie->mem
+ && strcmp(ie->mem_old, ie->mem) == 0) {
+ free(ie->mem_old);
+ ie->mem_old = ie->mem;
+ ie->mem = NULL;
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+static void print_issue_file(struct issue *ie,
+ struct options *op,
+ struct termios *tp)
+{
+ int oflag = tp->c_oflag; /* Save current setting. */
+
+ if ((op->flags & F_NONL) == 0) {
+ /* Issue not in use, start with a new line. */
+ write_all(STDOUT_FILENO, "\r\n", 2);
+ }
+
+ if (ie->do_tcsetattr) {
+ 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);
+ }
+ }
+
+ if (ie->mem_sz)
+ write_all(STDOUT_FILENO, ie->mem, ie->mem_sz);
+
+ if (ie->do_tcrestore) {
+ /* Restore settings. */
+ tp->c_oflag = oflag;
+ /* Wait till output is gone. */
+ tcsetattr(STDIN_FILENO, TCSADRAIN, tp);
+ }
+
+#ifdef AGETTY_RELOAD
+ free(ie->mem_old);
+ ie->mem_old = ie->mem;
+ ie->mem = NULL;
+ ie->mem_sz = 0;
+#else
+ free(ie->mem);
+ ie->mem = NULL;
+ ie->mem_sz = 0;
+#endif
+}
+
+static void eval_issue_file(struct issue *ie,
+ struct options *op,
+ struct termios *tp)
+{
+ int has_file = 0;
+
+#ifdef AGETTY_RELOAD
+ netlink_groups = 0;
+#endif
+ if (!(op->flags & F_ISSUE))
+ goto done;
+ /*
+ * The custom issue file or directory list specified by:
+ * agetty --isue-file <path[:path]...>
+ * Note that nothing is printed if the file/dir does not exist.
+ */
+ if (op->issue) {
+ char *list = strdup(op->issue);
+ char *file;
+
+ if (!list)
+ log_err(_("failed to allocate memory: %m"));
+
+ for (file = strtok(list, ":"); file; file = strtok(NULL, ":")) {
+ struct stat st;
+
+ if (stat(file, &st) < 0)
+ continue;
+ if (S_ISDIR(st.st_mode))
+ issuedir_read(ie, file, op, tp);
+ else
+ issuefile_read(ie, file, op, tp);
+ }
+ free(list);
+ goto done;
+ }
+
+ /* 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) {
+ issuefile_read(ie, _PATH_ISSUE, op, tp);
+ issuedir_read(ie, _PATH_ISSUEDIR, op, tp);
+ goto done;
+ }
+
+ /* Fallback @runstatedir (usually /run) -- the file is not required to
+ * read the dir.
+ */
+ if (issuefile_read(ie, _PATH_RUNSTATEDIR "/" _PATH_ISSUE_FILENAME, op, tp) == 0)
+ has_file++;
+ if (issuedir_read(ie, _PATH_RUNSTATEDIR "/" _PATH_ISSUE_DIRNAME, op, tp) == 0)
+ has_file++;
+ if (has_file)
+ goto done;
+
+ /* Fallback @sysconfstaticdir (usually /usr/lib) -- the file is not
+ * required to read the dir
+ */
+ issuefile_read(ie, _PATH_SYSCONFSTATICDIR "/" _PATH_ISSUE_FILENAME, op, tp);
+ issuedir_read(ie, _PATH_SYSCONFSTATICDIR "/" _PATH_ISSUE_DIRNAME, op, tp);
+
+done:
+
+#ifdef AGETTY_RELOAD
+ if (netlink_groups != 0)
+ open_netlink();
+#endif
+ if (ie->output) {
+ fclose(ie->output);
+ ie->output = NULL;
+ }
+}
+
+/* This is --show-issue backend, executed by normal user on the current
+ * terminal.
+ */
+static void show_issue(struct options *op)
+{
+ struct issue ie = { .output = NULL };
+ struct termios tp;
+
+ memset(&tp, 0, sizeof(struct termios));
+ if (tcgetattr(STDIN_FILENO, &tp) < 0)
+ err(EXIT_FAILURE, _("failed to get terminal attributes: %m"));
+
+ eval_issue_file(&ie, op, &tp);
+
+ if (ie.mem_sz)
+ write_all(STDOUT_FILENO, ie.mem, ie.mem_sz);
+ if (ie.output)
+ fclose(ie.output);
+ free(ie.mem);
+}
+
+#endif /* ISSUE_SUPPORT */
+
+/* Show login prompt, optionally preceded by /etc/issue contents. */
+static void do_prompt(struct issue *ie, struct options *op, struct termios *tp)
+{
+#ifdef AGETTY_RELOAD
+again:
+#endif
+ print_issue_file(ie, op, tp);
+
+ if (op->flags & F_LOGINPAUSE) {
+ puts(_("[press ENTER to login]"));
+#ifdef AGETTY_RELOAD
+ /* reload issue */
+ if (!wait_for_term_input(STDIN_FILENO)) {
+ eval_issue_file(ie, op, tp);
+ if (issue_is_changed(ie)) {
+ 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 issue *ie, 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|F_UTF8));
+ bp = logname;
+ *bp = '\0';
+
+ eval_issue_file(ie, op, tp);
+ while (*logname == '\0') {
+ /* Write issue file and prompt */
+ do_prompt(ie, op, tp);
+
+ no_reload:
+#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);
+ eval_issue_file(ie, op, tp);
+ if (!issue_is_changed(ie))
+ goto no_reload;
+ 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 */
+ /* fallthrough */
+ case CTL('C'):
+ if (key == CTL('C') && !(op->flags & F_VCONSOLE))
+ /* Ignore CTRL+C on serial line */
+ break;
+ 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 ((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;
+ }
+ /* Everything was erased. */
+ if (bp == logname && cp->eol == '\0')
+ goto no_reload;
+ }
+ }
+
+#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;
+ char *end = NULL;
+ long speed;
+
+ errno = 0;
+ speed = strtol(s, &end, 10);
+
+ if (errno || !end || end == s)
+ return 0;
+
+ 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 <list> display issue files or directories\n"), out);
+ fputs(_(" --show-issue display issue file and exit\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.
+ */
+static void dolog(int priority
+#ifndef USE_SYSLOG
+ __attribute__((__unused__))
+#endif
+ , const char *fmt, va_list ap)
+{
+#ifdef USE_SYSLOG
+ /*
+ * 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.
+ */
+ openlog(program_invocation_short_name, LOG_PID, LOG_AUTHPRIV);
+ vsyslog(priority, fmt, ap);
+ closelog();
+#else
+ /*
+ * Write the diagnostic directly to /dev/console if we do not use
+ * the syslog(3) facility.
+ */
+ char buf[BUFSIZ];
+ char new_fmt[BUFSIZ];
+ int fd;
+
+ snprintf(new_fmt, sizeof(new_fmt), "%s: %s\r\n",
+ program_invocation_short_name, fmt);
+ /* Terminate with CR-LF since the console mode is unknown. */
+ vsnprintf(buf, sizeof(buf), new_fmt, ap);
+
+ 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(struct issue *ie, sa_family_t family, void *addr)
+{
+ char buff[INET6_ADDRSTRLEN + 1];
+
+ inet_ntop(family, addr, buff, sizeof(buff));
+ fprintf(ie->output, "%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 issue *ie,
+ 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(ie, 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(ie, 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(struct issue *ie,
+ 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, ie->output);
+ } else
+ fputs("\033", ie->output);
+ break;
+ }
+ case 's':
+ uname(&uts);
+ fprintf(ie->output, "%s", uts.sysname);
+ break;
+ case 'n':
+ uname(&uts);
+ fprintf(ie->output, "%s", uts.nodename);
+ break;
+ case 'r':
+ uname(&uts);
+ fprintf(ie->output, "%s", uts.release);
+ break;
+ case 'v':
+ uname(&uts);
+ fprintf(ie->output, "%s", uts.version);
+ break;
+ case 'm':
+ uname(&uts);
+ fprintf(ie->output, "%s", uts.machine);
+ break;
+ case 'o':
+ {
+ char *dom = xgetdomainname();
+
+ fputs(dom ? dom : "unknown_domain", ie->output);
+ 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", ie->output);
+ if (info)
+ freeaddrinfo(info);
+ free(host);
+ break;
+ }
+ case 'd':
+ case 't':
+ {
+ time_t now;
+ struct tm tm;
+
+ time(&now);
+ localtime_r(&now, &tm);
+
+ if (c == 'd') /* ISO 8601 */
+ fprintf(ie->output, "%s %s %2d %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
+ fprintf(ie->output, "%02d:%02d:%02d",
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+ break;
+ }
+ case 'l':
+ fprintf (ie->output, "%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) {
+ fprintf(ie->output, "%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)
+ fprintf(ie->output, "\033[%sm", var);
+ else
+ fputs(var, ie->output);
+ }
+ /* \S */
+ } else if ((var = read_os_release(op, "PRETTY_NAME"))) {
+ fputs(var, ie->output);
+
+ /* \S and PRETTY_NAME not found */
+ } else {
+ uname(&uts);
+ fputs(uts.sysname, ie->output);
+ }
+
+ 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')
+ fprintf(ie->output, P_("%d user", "%d users", users), users);
+ else
+ fprintf (ie->output, "%d ", users);
+ break;
+ }
+#if defined(RTMGRP_IPV4_IFADDR) && defined(RTMGRP_IPV6_IFADDR)
+ case '4':
+ case '6':
+ {
+ sa_family_t family = c == '4' ? AF_INET : AF_INET6;
+ struct ifaddrs *addrs = NULL;
+ char iface[128];
+
+ if (getifaddrs(&addrs))
+ break;
+
+ if (get_escape_argument(fp, iface, sizeof(iface)))
+ output_iface_ip(ie, addrs, iface, family);
+ else
+ output_iface_ip(ie, addrs, NULL, family);
+
+ freeifaddrs(addrs);
+
+ if (c == '4')
+ netlink_groups |= RTMGRP_IPV4_IFADDR;
+ else
+ netlink_groups |= RTMGRP_IPV6_IFADDR;
+ break;
+ }
+#endif
+ default:
+ putc(c, ie->output);
+ 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
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 22:18:15 +0000