getty: simplify code by going to more straignforward G trick
function old new delta getty_main 1615 1475 -140 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
e9a40e3b91
commit
6596380f52
@ -16,11 +16,9 @@
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#include "libbb.h"
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#include <syslog.h>
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#if ENABLE_FEATURE_UTMP
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# include <utmp.h> /* LOGIN_PROCESS */
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#endif
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#ifndef IUCLC
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# define IUCLC 0
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#endif
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@ -36,7 +34,7 @@
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# undef ENABLE_FEATURE_WTMP
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# define ENABLE_FEATURE_UTMP 0
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# define ENABLE_FEATURE_WTMP 0
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#endif /* LOGIN_PROCESS */
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#endif
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/* The following is used for understandable diagnostics. */
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@ -56,18 +54,6 @@ static FILE *dbf;
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* below. Note, however, that DEL cannot be used for interrupt generation
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* and for line editing at the same time.
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*/
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/* I doubt there are systems which still... */
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/* ...have only uppercase: */
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#undef HANDLE_ALLCAPS
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/* ...use # and @ for backspace and line erase: */
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#undef ANCIENT_BS_KILL_CHARS
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/* It actually makes sense (tries to guess parity by looking at 7th bit)
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* but it's broken, and interferes with non-ASCII login names
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* (yes, I did receive complains from real users):
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*/
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#undef BROKEN_PARITY_DETECTION_CODE
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#undef _PATH_LOGIN
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#define _PATH_LOGIN "/bin/login"
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@ -100,8 +86,7 @@ static FILE *dbf;
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*/
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#define MAX_SPEED 10 /* max. nr. of baud rates */
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/* Storage for command-line options. */
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struct options {
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struct globals {
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unsigned timeout; /* time-out period */
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const char *login; /* login program */
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const char *tty; /* name of tty */
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@ -109,46 +94,17 @@ struct options {
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const char *issue; /* alternative issue file */
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int numspeed; /* number of baud rates to try */
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int speeds[MAX_SPEED]; /* baud rates to be tried */
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};
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/* Storage for things detected while the login name was read. */
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struct chardata {
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struct termios termios; /* terminal mode bits */
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/* Storage for things detected while the login name was read. */
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unsigned char erase; /* erase character */
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#ifdef ANCIENT_BS_KILL_CHARS
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unsigned char kill; /* kill character */
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#endif
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unsigned char eol; /* end-of-line character */
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#ifdef BROKEN_PARITY_DETECTION_CODE
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unsigned char parity; /* what parity did we see */
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/* (parity & 1): saw odd parity char with 7th bit set */
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/* (parity & 2): saw even parity char with 7th bit set */
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/* parity == 0: probably 7-bit, space parity? */
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/* parity == 1: probably 7-bit, odd parity? */
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/* parity == 2: probably 7-bit, even parity? */
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/* parity == 3: definitely 8 bit, no parity! */
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/* Hmm... with any value of parity "8 bit, no parity" is possible */
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#endif
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#ifdef HANDLE_ALLCAPS
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unsigned char capslock; /* upper case without lower case */
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#endif
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char line_buf[128];
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};
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/* Initial values for the above. */
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static const struct chardata init_chardata = {
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DEF_ERASE, /* default erase character */
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#ifdef ANCIENT_BS_KILL_CHARS
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DEF_KILL, /* default kill character */
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#endif
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13, /* default eol char */
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#ifdef BROKEN_PARITY_DETECTION_CODE
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0, /* space parity */
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#endif
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#ifdef HANDLE_ALLCAPS
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0, /* no capslock */
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#endif
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};
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#define line_buf bb_common_bufsiz1
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#define G (*ptr_to_globals)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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} while (0)
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//usage:#define getty_trivial_usage
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//usage: "[OPTIONS] BAUD_RATE[,BAUD_RATE]... TTY [TERMTYPE]"
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@ -193,52 +149,53 @@ static int bcode(const char *s)
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}
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/* parse alternate baud rates */
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static void parse_speeds(struct options *op, char *arg)
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static void parse_speeds(char *arg)
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{
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char *cp;
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/* NB: at least one iteration is always done */
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debug("entered parse_speeds\n");
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while ((cp = strsep(&arg, ",")) != NULL) {
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op->speeds[op->numspeed] = bcode(cp);
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if (op->speeds[op->numspeed] < 0)
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G.speeds[G.numspeed] = bcode(cp);
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if (G.speeds[G.numspeed] < 0)
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bb_error_msg_and_die("bad speed: %s", cp);
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/* note: arg "0" turns into speed B0 */
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op->numspeed++;
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if (op->numspeed > MAX_SPEED)
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G.numspeed++;
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if (G.numspeed > MAX_SPEED)
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bb_error_msg_and_die("too many alternate speeds");
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}
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debug("exiting parse_speeds\n");
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}
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/* parse command-line arguments */
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static void parse_args(char **argv, struct options *op, char **fakehost_p)
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static void parse_args(char **argv, char **fakehost_p)
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{
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char *ts;
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int flags;
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opt_complementary = "-2:t+"; /* at least 2 args; -t N */
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flags = getopt32(argv, opt_string,
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&(op->initstring), fakehost_p, &(op->issue),
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&(op->login), &op->timeout);
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&G.initstring, fakehost_p, &G.issue,
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&G.login, &G.timeout
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);
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if (flags & F_INITSTRING) {
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op->initstring = xstrdup(op->initstring);
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G.initstring = xstrdup(G.initstring);
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/* decode \ddd octal codes into chars */
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strcpy_and_process_escape_sequences((char*)op->initstring, op->initstring);
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strcpy_and_process_escape_sequences((char*)G.initstring, G.initstring);
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}
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argv += optind;
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debug("after getopt\n");
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/* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
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op->tty = argv[0]; /* tty name */
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/* We loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
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G.tty = argv[0]; /* tty name */
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ts = argv[1]; /* baud rate(s) */
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if (isdigit(argv[0][0])) {
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/* a number first, assume it's a speed (BSD style) */
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op->tty = ts; /* tty name is in argv[1] */
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/* A number first, assume it's a speed (BSD style) */
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G.tty = ts; /* tty name is in argv[1] */
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ts = argv[0]; /* baud rate(s) */
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}
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parse_speeds(op, ts);
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applet_name = xasprintf("getty: %s", op->tty);
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parse_speeds(ts);
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applet_name = xasprintf("getty: %s", G.tty);
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if (argv[2])
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xsetenv("TERM", argv[2]);
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@ -247,17 +204,17 @@ static void parse_args(char **argv, struct options *op, char **fakehost_p)
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}
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/* set up tty as standard input, output, error */
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static void open_tty(const char *tty)
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static void open_tty(void)
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{
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/* Set up new standard input, unless we are given an already opened port. */
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if (NOT_LONE_DASH(tty)) {
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if (tty[0] != '/')
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tty = xasprintf("/dev/%s", tty); /* will leak it */
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if (NOT_LONE_DASH(G.tty)) {
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if (G.tty[0] != '/')
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G.tty = xasprintf("/dev/%s", G.tty); /* will leak it */
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/* Open the tty as standard input. */
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debug("open(2)\n");
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close(0);
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/*fd =*/ xopen(tty, O_RDWR | O_NONBLOCK); /* uses fd 0 */
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xopen(G.tty, O_RDWR | O_NONBLOCK); /* uses fd 0 */
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/* Set proper protections and ownership. */
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fchown(0, 0, 0); /* 0:0 */
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@ -273,7 +230,7 @@ static void open_tty(const char *tty)
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}
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/* initialize termios settings */
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static void termios_init(struct termios *tp, int speed)
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static void termios_init(int speed)
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{
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/* Flush input and output queues, important for modems!
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* Users report losing previously queued output chars, and I hesitate
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@ -285,7 +242,7 @@ static void termios_init(struct termios *tp, int speed)
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/* Set speed if it wasn't specified as "0" on command line. */
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if (speed != B0)
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cfsetspeed(tp, speed);
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cfsetspeed(&G.termios, speed);
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/*
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* Initial termios settings: 8-bit characters, raw-mode, blocking i/o.
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@ -293,31 +250,29 @@ static void termios_init(struct termios *tp, int speed)
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* reads will be done in raw mode anyway. Errors will be dealt with
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* later on.
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*/
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tp->c_cflag = CS8 | HUPCL | CREAD;
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G.termios.c_cflag = CS8 | HUPCL | CREAD;
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if (option_mask32 & F_LOCAL)
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tp->c_cflag |= CLOCAL;
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tp->c_iflag = 0;
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tp->c_lflag = 0;
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tp->c_oflag = OPOST | ONLCR;
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tp->c_cc[VMIN] = 1;
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tp->c_cc[VTIME] = 0;
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G.termios.c_cflag |= CLOCAL;
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G.termios.c_iflag = 0;
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G.termios.c_lflag = 0;
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G.termios.c_oflag = OPOST | ONLCR;
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G.termios.c_cc[VMIN] = 1;
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G.termios.c_cc[VTIME] = 0;
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#ifdef __linux__
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tp->c_line = 0;
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G.termios.c_line = 0;
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#endif
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/* Optionally enable hardware flow control */
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#ifdef CRTSCTS
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if (option_mask32 & F_RTSCTS)
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tp->c_cflag |= CRTSCTS;
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G.termios.c_cflag |= CRTSCTS;
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#endif
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tcsetattr_stdin_TCSANOW(tp);
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tcsetattr_stdin_TCSANOW(&G.termios);
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debug("term_io 2\n");
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}
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/* extract baud rate from modem status message */
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static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
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static void auto_baud(void)
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{
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int speed;
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int vmin;
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@ -344,83 +299,60 @@ static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
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* Use 7-bit characters, don't block if input queue is empty. Errors will
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* be dealt with later on.
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*/
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iflag = tp->c_iflag;
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tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */
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vmin = tp->c_cc[VMIN];
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tp->c_cc[VMIN] = 0; /* don't block if queue empty */
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tcsetattr_stdin_TCSANOW(tp);
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iflag = G.termios.c_iflag;
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G.termios.c_iflag |= ISTRIP; /* enable 8th-bit stripping */
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vmin = G.termios.c_cc[VMIN];
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G.termios.c_cc[VMIN] = 0; /* don't block if queue empty */
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tcsetattr_stdin_TCSANOW(&G.termios);
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/*
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* Wait for a while, then read everything the modem has said so far and
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* try to extract the speed of the dial-in call.
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*/
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sleep(1);
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nread = safe_read(STDIN_FILENO, buf, size_buf - 1);
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nread = safe_read(STDIN_FILENO, G.line_buf, sizeof(G.line_buf) - 1);
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if (nread > 0) {
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buf[nread] = '\0';
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for (bp = buf; bp < buf + nread; bp++) {
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G.line_buf[nread] = '\0';
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for (bp = G.line_buf; bp < G.line_buf + nread; bp++) {
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if (isdigit(*bp)) {
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speed = bcode(bp);
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if (speed > 0)
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cfsetspeed(tp, speed);
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cfsetspeed(&G.termios, speed);
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break;
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}
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}
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}
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/* Restore terminal settings. Errors will be dealt with later on. */
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tp->c_iflag = iflag;
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tp->c_cc[VMIN] = vmin;
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tcsetattr_stdin_TCSANOW(tp);
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G.termios.c_iflag = iflag;
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G.termios.c_cc[VMIN] = vmin;
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tcsetattr_stdin_TCSANOW(&G.termios);
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}
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#ifdef HANDLE_ALLCAPS
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/* does string contain upper case without lower case? */
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static int all_is_upcase(const char *s)
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{
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while (*s)
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if (islower(*s++))
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return 0;
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return 1;
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}
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#endif
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/* get user name, establish parity, speed, erase, kill, eol;
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* return NULL on BREAK, logname on success */
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static char *get_logname(char *logname, unsigned size_logname,
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struct options *op, struct chardata *cp)
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static char *get_logname(void)
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{
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char *bp;
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char c; /* input character, full eight bits */
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char ascval; /* low 7 bits of input character */
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#ifdef BROKEN_PARITY_DETECTION_CODE
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static const char erase[][3] = {/* backspace-space-backspace */
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"\010\040\010", /* space parity */
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"\010\040\010", /* odd parity */
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"\210\240\210", /* even parity */
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"\010\040\010", /* 8 bit no parity */
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};
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#endif
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/* NB: *cp is pre-initialized with init_chardata */
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char c;
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/* Flush pending input (esp. after parsing or switching the baud rate). */
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usleep(100*1000); /* 0.1 sec */
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tcflush(STDIN_FILENO, TCIOFLUSH);
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/* Prompt for and read a login name. */
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logname[0] = '\0';
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while (!logname[0]) {
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G.line_buf[0] = '\0';
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while (!G.line_buf[0]) {
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/* Write issue file and prompt. */
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#ifdef ISSUE
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if (!(option_mask32 & F_NOISSUE))
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print_login_issue(op->issue, op->tty);
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print_login_issue(G.issue, G.tty);
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#endif
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print_login_prompt();
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/* Read name, watch for break, parity, erase, kill, end-of-line. */
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bp = logname;
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cp->eol = '\0';
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bp = G.line_buf;
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G.eol = '\0';
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while (1) {
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/* Do not report trivial EINTR/EIO errors. */
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errno = EINTR; /* make read of 0 bytes be silent too */
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@ -432,71 +364,39 @@ static char *get_logname(char *logname, unsigned size_logname,
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/* BREAK. If we have speeds to try,
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* return NULL (will switch speeds and return here) */
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if (c == '\0' && op->numspeed > 1)
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if (c == '\0' && G.numspeed > 1)
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return NULL;
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#ifdef BROKEN_PARITY_DETECTION_CODE
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/* Do parity bit handling. */
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if (!(option_mask32 & F_LOCAL) && (c & 0x80)) { /* "parity" bit on? */
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int bits = 1;
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int mask = 1;
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while (mask & 0x7f) {
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if (mask & c)
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bits++; /* count "1" bits */
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mask <<= 1;
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}
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/* ... |= 2 - even, 1 - odd */
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cp->parity |= 2 - (bits & 1);
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}
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ascval = c & 0x7f;
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#else
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ascval = c;
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#endif
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/* Do erase, kill and end-of-line processing. */
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switch (ascval) {
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switch (c) {
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case CR:
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case NL:
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*bp = '\0'; /* terminate logname */
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cp->eol = ascval; /* set end-of-line char */
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*bp = '\0';
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G.eol = c;
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goto got_logname;
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case BS:
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case DEL:
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#ifdef ANCIENT_BS_KILL_CHARS
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case '#':
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#endif
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cp->erase = ascval; /* set erase character */
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if (bp > logname) {
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#ifdef BROKEN_PARITY_DETECTION_CODE
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full_write(STDOUT_FILENO, erase[cp->parity], 3);
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#else
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G.erase = c;
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if (bp > G.line_buf) {
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full_write(STDOUT_FILENO, "\010 \010", 3);
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#endif
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bp--;
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}
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break;
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case CTL('U'):
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#ifdef ANCIENT_BS_KILL_CHARS
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case '@':
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cp->kill = ascval; /* set kill character */
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#endif
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while (bp > logname) {
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#ifdef BROKEN_PARITY_DETECTION_CODE
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full_write(STDOUT_FILENO, erase[cp->parity], 3);
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#else
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while (bp > G.line_buf) {
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full_write(STDOUT_FILENO, "\010 \010", 3);
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#endif
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bp--;
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}
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break;
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case CTL('D'):
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exit(EXIT_SUCCESS);
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default:
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if (ascval < ' ') {
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if ((unsigned char)c < ' ') {
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/* ignore garbage characters */
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} else if ((int)(bp - logname) < size_logname - 1) {
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full_write(STDOUT_FILENO, &c, 1); /* echo the character */
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*bp++ = ascval; /* and store it */
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} else if ((int)(bp - G.line_buf) < sizeof(G.line_buf) - 1) {
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/* echo and store the character */
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full_write(STDOUT_FILENO, &c, 1);
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*bp++ = c;
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}
|
||||
break;
|
||||
}
|
||||
@ -504,87 +404,42 @@ static char *get_logname(char *logname, unsigned size_logname,
|
||||
got_logname: ;
|
||||
} /* while logname is empty */
|
||||
|
||||
#ifdef HANDLE_ALLCAPS
|
||||
/* Handle names with upper case and no lower case. */
|
||||
cp->capslock = all_is_upcase(logname);
|
||||
if (cp->capslock) {
|
||||
for (bp = logname; *bp; bp++)
|
||||
if (isupper(*bp))
|
||||
*bp = tolower(*bp); /* map name to lower case */
|
||||
}
|
||||
#endif
|
||||
return logname;
|
||||
return G.line_buf;
|
||||
}
|
||||
|
||||
/* set the final tty mode bits */
|
||||
static void termios_final(struct termios *tp, struct chardata *cp)
|
||||
static void termios_final(void)
|
||||
{
|
||||
/* General terminal-independent stuff. */
|
||||
tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */
|
||||
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; /* default interrupt */
|
||||
tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */
|
||||
tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */
|
||||
tp->c_cc[VEOL] = DEF_EOL;
|
||||
G.termios.c_iflag |= IXON | IXOFF; /* 2-way flow control */
|
||||
G.termios.c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE;
|
||||
/* no longer in lflag: | ECHOCTL | ECHOPRT */
|
||||
G.termios.c_oflag |= OPOST;
|
||||
/* G.termios.c_cflag = 0; */
|
||||
G.termios.c_cc[VINTR] = DEF_INTR; /* default interrupt */
|
||||
G.termios.c_cc[VQUIT] = DEF_QUIT; /* default quit */
|
||||
G.termios.c_cc[VEOF] = DEF_EOF; /* default EOF character */
|
||||
G.termios.c_cc[VEOL] = DEF_EOL;
|
||||
#ifdef VSWTC
|
||||
tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
|
||||
G.termios.c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
|
||||
#endif
|
||||
|
||||
/* Account for special characters seen in input. */
|
||||
if (cp->eol == CR) {
|
||||
tp->c_iflag |= ICRNL; /* map CR in input to NL */
|
||||
tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */
|
||||
if (G.eol == CR) {
|
||||
G.termios.c_iflag |= ICRNL; /* map CR in input to NL */
|
||||
G.termios.c_oflag |= ONLCR; /* map NL in output to CR-NL */
|
||||
}
|
||||
tp->c_cc[VERASE] = cp->erase; /* set erase character */
|
||||
#ifdef ANCIENT_BS_KILL_CHARS
|
||||
tp->c_cc[VKILL] = cp->kill; /* set kill character */
|
||||
#else
|
||||
tp->c_cc[VKILL] = DEF_KILL; /* set kill character */
|
||||
#endif
|
||||
|
||||
#ifdef BROKEN_PARITY_DETECTION_CODE
|
||||
/* Account for the presence or absence of parity bits in input. */
|
||||
switch (cp->parity) {
|
||||
case 0: /* space (always 0) parity */
|
||||
// I bet most people go here - they use only 7-bit chars in usernames....
|
||||
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;
|
||||
// FIXME: wtf? case 3: we saw both even and odd 8-bit bytes -
|
||||
// it's probably some umlauts etc, but definitely NOT 7-bit!!!
|
||||
// Entire parity detection madness here just begs for deletion...
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef HANDLE_ALLCAPS
|
||||
/* Account for upper case without lower case. */
|
||||
if (cp->capslock) {
|
||||
tp->c_iflag |= IUCLC;
|
||||
tp->c_lflag |= XCASE;
|
||||
tp->c_oflag |= OLCUC;
|
||||
}
|
||||
#endif
|
||||
G.termios.c_cc[VERASE] = G.erase; /* set erase character */
|
||||
G.termios.c_cc[VKILL] = DEF_KILL; /* set kill character */
|
||||
|
||||
#ifdef CRTSCTS
|
||||
/* Optionally enable hardware flow control */
|
||||
if (option_mask32 & F_RTSCTS)
|
||||
tp->c_cflag |= CRTSCTS;
|
||||
G.termios.c_cflag |= CRTSCTS;
|
||||
#endif
|
||||
|
||||
/* Finally, make the new settings effective */
|
||||
if (tcsetattr_stdin_TCSANOW(tp) < 0)
|
||||
if (tcsetattr_stdin_TCSANOW(&G.termios) < 0)
|
||||
bb_perror_msg_and_die("tcsetattr");
|
||||
}
|
||||
|
||||
@ -594,26 +449,19 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
int n;
|
||||
pid_t pid;
|
||||
char *fakehost = NULL; /* Fake hostname for ut_host */
|
||||
char *logname; /* login name, given to /bin/login */
|
||||
/* Merging these into "struct local" may _seem_ to reduce
|
||||
* parameter passing, but today's gcc will inline
|
||||
* statics which are called once anyway, so don't do that */
|
||||
struct chardata chardata; /* set by get_logname() */
|
||||
struct termios termios; /* terminal mode bits */
|
||||
struct options options;
|
||||
char *logname;
|
||||
|
||||
chardata = init_chardata;
|
||||
|
||||
memset(&options, 0, sizeof(options));
|
||||
options.login = _PATH_LOGIN; /* default login program */
|
||||
options.tty = "tty1"; /* default tty line */
|
||||
options.initstring = ""; /* modem init string */
|
||||
INIT_G();
|
||||
G.login = _PATH_LOGIN; /* default login program */
|
||||
G.initstring = ""; /* modem init string */
|
||||
#ifdef ISSUE
|
||||
options.issue = ISSUE; /* default issue file */
|
||||
G.issue = ISSUE; /* default issue file */
|
||||
#endif
|
||||
G.erase = DEF_ERASE;
|
||||
G.eol = CR;
|
||||
|
||||
/* Parse command-line arguments. */
|
||||
parse_args(argv, &options, &fakehost);
|
||||
parse_args(argv, &fakehost);
|
||||
|
||||
logmode = LOGMODE_NONE;
|
||||
|
||||
@ -648,7 +496,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
/* Open the tty as standard input, if it is not "-" */
|
||||
/* If it's not "-" and not taken yet, it will become our ctty */
|
||||
debug("calling open_tty\n");
|
||||
open_tty(options.tty);
|
||||
open_tty();
|
||||
ndelay_off(0);
|
||||
debug("duping\n");
|
||||
xdup2(0, 1);
|
||||
@ -662,7 +510,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
* by patching the SunOS kernel variable "zsadtrlow" to a larger value;
|
||||
* 5 seconds seems to be a good value.
|
||||
*/
|
||||
if (tcgetattr(STDIN_FILENO, &termios) < 0)
|
||||
if (tcgetattr(STDIN_FILENO, &G.termios) < 0)
|
||||
bb_perror_msg_and_die("tcgetattr");
|
||||
|
||||
pid = getpid();
|
||||
@ -676,25 +524,25 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
#endif
|
||||
|
||||
/* Update the utmp file. This tty is ours now! */
|
||||
update_utmp(pid, LOGIN_PROCESS, options.tty, "LOGIN", fakehost);
|
||||
update_utmp(pid, LOGIN_PROCESS, G.tty, "LOGIN", fakehost);
|
||||
|
||||
/* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */
|
||||
debug("calling termios_init\n");
|
||||
termios_init(&termios, options.speeds[0]);
|
||||
termios_init(G.speeds[0]);
|
||||
|
||||
/* Write the modem init string and DON'T flush the buffers */
|
||||
if (option_mask32 & F_INITSTRING) {
|
||||
debug("writing init string\n");
|
||||
full_write1_str(options.initstring);
|
||||
full_write1_str(G.initstring);
|
||||
}
|
||||
|
||||
/* Optionally detect the baud rate from the modem status message */
|
||||
debug("before autobaud\n");
|
||||
if (option_mask32 & F_PARSE)
|
||||
auto_baud(line_buf, sizeof(line_buf), &termios);
|
||||
auto_baud();
|
||||
|
||||
/* Set the optional timer */
|
||||
alarm(options.timeout); /* if 0, alarm is not set */
|
||||
alarm(G.timeout); /* if 0, alarm is not set */
|
||||
|
||||
/* Optionally wait for CR or LF before writing /etc/issue */
|
||||
if (option_mask32 & F_WAITCRLF) {
|
||||
@ -703,7 +551,6 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
debug("waiting for cr-lf\n");
|
||||
while (safe_read(STDIN_FILENO, &ch, 1) == 1) {
|
||||
debug("read %x\n", (unsigned char)ch);
|
||||
ch &= 0x7f; /* strip "parity bit" */
|
||||
if (ch == '\n' || ch == '\r')
|
||||
break;
|
||||
}
|
||||
@ -712,20 +559,19 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
logname = NULL;
|
||||
if (!(option_mask32 & F_NOPROMPT)) {
|
||||
/* NB: termios_init already set line speed
|
||||
* to options.speeds[0] */
|
||||
* to G.speeds[0] */
|
||||
int baud_index = 0;
|
||||
|
||||
while (1) {
|
||||
/* Read the login name. */
|
||||
debug("reading login name\n");
|
||||
logname = get_logname(line_buf, sizeof(line_buf),
|
||||
&options, &chardata);
|
||||
logname = get_logname();
|
||||
if (logname)
|
||||
break;
|
||||
/* we are here only if options.numspeed > 1 */
|
||||
baud_index = (baud_index + 1) % options.numspeed;
|
||||
cfsetspeed(&termios, options.speeds[baud_index]);
|
||||
tcsetattr_stdin_TCSANOW(&termios);
|
||||
/* We are here only if G.numspeed > 1. */
|
||||
baud_index = (baud_index + 1) % G.numspeed;
|
||||
cfsetspeed(&G.termios, G.speeds[baud_index]);
|
||||
tcsetattr_stdin_TCSANOW(&G.termios);
|
||||
}
|
||||
}
|
||||
|
||||
@ -733,7 +579,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
alarm(0);
|
||||
|
||||
/* Finalize the termios settings. */
|
||||
termios_final(&termios, &chardata);
|
||||
termios_final();
|
||||
|
||||
/* Now the newline character should be properly written. */
|
||||
full_write(STDOUT_FILENO, "\n", 1);
|
||||
@ -742,6 +588,6 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
|
||||
/* We use PATH because we trust that root doesn't set "bad" PATH,
|
||||
* and getty is not suid-root applet. */
|
||||
/* With -n, logname == NULL, and login will ask for username instead */
|
||||
BB_EXECLP(options.login, options.login, "--", logname, NULL);
|
||||
bb_error_msg_and_die("can't execute '%s'", options.login);
|
||||
BB_EXECLP(G.login, G.login, "--", logname, NULL);
|
||||
bb_error_msg_and_die("can't execute '%s'", G.login);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user