randomconfig fixes

[oweals/busybox.git] / loginutils / getty.c

diff --git a/loginutils/getty.c b/loginutils/getty.c
index 174542841925f0d9d98426a53f52c5d31db448e7..7393a3d1c5ad956f17d261dd3e2112904b4d3197 100644 (file)
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -21,6 +21,28 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config GETTY
+//config:      bool "getty (10 kb)"
+//config:      default y
+//config:      select FEATURE_SYSLOG
+//config:      help
+//config:      getty lets you log in on a tty. It is normally invoked by init.
+//config:
+//config:      Note that you can save a few bytes by disabling it and
+//config:      using login applet directly.
+//config:      If you need to reset tty attributes before calling login,
+//config:      this script approximates getty:
+//config:
+//config:      exec </dev/$1 >/dev/$1 2>&1 || exit 1
+//config:      reset
+//config:      stty sane; stty ispeed 38400; stty ospeed 38400
+//config:      printf "%s login: " "`hostname`"
+//config:      read -r login
+//config:      exec /bin/login "$login"
+
+//applet:IF_GETTY(APPLET(getty, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_GETTY) += getty.o
 
 #include "libbb.h"
 #include <syslog.h>
@@ -109,7 +131,7 @@ struct globals {
 //usage:     "\n"
 //usage:     "\nBAUD_RATE of 0 leaves it unchanged"
 
-static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
+#define OPT_STR "I:LH:f:hil:mt:+wn"
 #define F_INITSTRING    (1 << 0)   /* -I */
 #define F_LOCAL         (1 << 1)   /* -L */
 #define F_FAKEHOST      (1 << 2)   /* -H */
@@ -146,7 +168,7 @@ static void parse_speeds(char *arg)
                /* note: arg "0" turns into speed B0 */
                G.numspeed++;
                if (G.numspeed > MAX_SPEED)
-                       bb_error_msg_and_die("too many alternate speeds");
+                       bb_simple_error_msg_and_die("too many alternate speeds");
        }
        debug("exiting parse_speeds\n");
 }
@@ -157,8 +179,7 @@ static void parse_args(char **argv)
        char *ts;
        int flags;
 
-       opt_complementary = "-2:t+"; /* at least 2 args; -t N */
-       flags = getopt32(argv, opt_string,
+       flags = getopt32(argv, "^" OPT_STR "\0" "-2"/* at least 2 args*/,
                &G.initstring, &G.fakehost, &G.issue,
                &G.login, &G.timeout
        );
@@ -209,7 +230,7 @@ static void open_tty(void)
                 * Make sure it is open for read/write.
                 */
                if ((fcntl(0, F_GETFL) & (O_RDWR|O_RDONLY|O_WRONLY)) != O_RDWR)
-                       bb_error_msg_and_die("stdin is not open for read/write");
+                       bb_simple_error_msg_and_die("stdin is not open for read/write");
 
                /* Try to get real tty name instead of "-" */
                n = xmalloc_ttyname(0);
@@ -222,7 +243,7 @@ static void open_tty(void)
 static void set_tty_attrs(void)
 {
        if (tcsetattr_stdin_TCSANOW(&G.tty_attrs) < 0)
-               bb_perror_msg_and_die("tcsetattr");
+               bb_simple_perror_msg_and_die("tcsetattr");
 }
 
 /* We manipulate tty_attrs this way:
@@ -294,7 +315,7 @@ static void init_tty_attrs(int speed)
        /* non-raw output; add CR to each NL */
        G.tty_attrs.c_oflag = OPOST | ONLCR;
 
-       /* reads would block only if < 1 char is available */
+       /* reads will block only if < 1 char is available */
        G.tty_attrs.c_cc[VMIN] = 1;
        /* no timeout (reads block forever) */
        G.tty_attrs.c_cc[VTIME] = 0;
@@ -464,7 +485,7 @@ static char *get_logname(void)
                                finalize_tty_attrs();
                                if (errno == EINTR || errno == EIO)
                                        exit(EXIT_SUCCESS);
-                               bb_perror_msg_and_die(bb_msg_read_error);
+                               bb_simple_perror_msg_and_die(bb_msg_read_error);
                        }
 
                        switch (c) {
@@ -520,6 +541,11 @@ static void alarm_handler(int sig UNUSED_PARAM)
        _exit(EXIT_SUCCESS);
 }
 
+static void sleep10(void)
+{
+       sleep(10);
+}
+
 int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int getty_main(int argc UNUSED_PARAM, char **argv)
 {
@@ -556,7 +582,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
                        //      " sid %d pgid %d",
                        //      pid, getppid(),
                        //      getsid(0), getpgid(0));
-                       bb_perror_msg_and_die("setsid");
+                       bb_simple_perror_msg_and_die("setsid");
                        /*
                         * When we can end up here?
                         * Example: setsid() fails when run alone in interactive shell:
@@ -599,7 +625,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
                close(n--);
 
        /* Logging. We want special flavor of error_msg_and_die */
-       die_sleep = 10;
+       die_func = sleep10;
        msg_eol = "\r\n";
        /* most likely will internally use fd #3 in CLOEXEC mode: */
        openlog(applet_name, LOG_PID, LOG_AUTH);
@@ -625,13 +651,13 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
        tsid = tcgetsid(STDIN_FILENO);
        if (tsid < 0 || pid != tsid) {
                if (ioctl(STDIN_FILENO, TIOCSCTTY, /*force:*/ (long)1) < 0)
-                       bb_perror_msg_and_die("TIOCSCTTY");
+                       bb_simple_perror_msg_and_die("TIOCSCTTY");
        }
 
 #ifdef __linux__
        /* Make ourself a foreground process group within our session */
        if (tcsetpgrp(STDIN_FILENO, pid) < 0)
-               bb_perror_msg_and_die("tcsetpgrp");
+               bb_simple_perror_msg_and_die("tcsetpgrp");
 #endif
 
        /*
@@ -643,7 +669,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
         * 5 seconds seems to be a good value.
         */
        if (tcgetattr(STDIN_FILENO, &G.tty_attrs) < 0)
-               bb_perror_msg_and_die("tcgetattr");
+               bb_simple_perror_msg_and_die("tcgetattr");
 
        /* Update the utmp file. This tty is ours now! */
        update_utmp(pid, LOGIN_PROCESS, G.tty_name, "LOGIN", G.fakehost);