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Diffstat (limited to 'loginutils')
-rw-r--r--loginutils/getty.c135
1 files changed, 67 insertions, 68 deletions
diff --git a/loginutils/getty.c b/loginutils/getty.c
index 76b0de449..0f5e333a7 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -31,14 +31,25 @@
* System V, assume it is SunOS 4.
*/
#ifdef LOGIN_PROCESS /* defined in System V utmp.h */
-#include <sys/utsname.h>
+# include <sys/utsname.h>
#else /* if !sysV style, wtmp/utmp code is off */
-#undef ENABLE_FEATURE_UTMP
-#undef ENABLE_FEATURE_WTMP
-#define ENABLE_FEATURE_UTMP 0
-#define ENABLE_FEATURE_WTMP 0
+# undef ENABLE_FEATURE_UTMP
+# undef ENABLE_FEATURE_WTMP
+# define ENABLE_FEATURE_UTMP 0
+# define ENABLE_FEATURE_WTMP 0
#endif /* LOGIN_PROCESS */
+
+/* The following is used for understandable diagnostics. */
+#ifdef DEBUGGING
+static FILE *dbf;
+# define DEBUGTERM "/dev/ttyp0"
+# define debug(...) do { fprintf(dbf, __VA_ARGS__); fflush(dbf); } while (0)
+#else
+# define debug(...) ((void)0)
+#endif
+
+
/*
* Things you may want to modify.
*
@@ -51,13 +62,15 @@
#undef HANDLE_ALLCAPS
#undef ANCIENT_BS_KILL_CHARS
+#undef _PATH_LOGIN
#define _PATH_LOGIN "/bin/login"
-/* If ISSUE is not defined, getty will never display the contents of the
+/* Displayed before the login prompt.
+ * If ISSUE is not defined, getty 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.
*/
-#define ISSUE "/etc/issue" /* displayed before the login prompt */
+#define ISSUE "/etc/issue"
/* Some shorthands for control characters. */
#define CTL(x) ((x) ^ 0100) /* Assumes ASCII dialect */
@@ -83,7 +96,6 @@
/* Storage for command-line options. */
struct options {
- int flags; /* toggle switches, see below */
unsigned timeout; /* time-out period */
const char *login; /* login program */
const char *tty; /* name of tty */
@@ -111,7 +123,6 @@ struct chardata {
#endif
};
-
/* Initial values for the above. */
static const struct chardata init_chardata = {
DEF_ERASE, /* default erase character */
@@ -123,30 +134,37 @@ static const struct chardata init_chardata = {
#endif
};
-static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
-#define F_INITSTRING (1 << 0) /* -I initstring is set */
-#define F_LOCAL (1 << 1) /* -L force local */
-#define F_FAKEHOST (1 << 2) /* -H fake hostname */
-#define F_CUSTISSUE (1 << 3) /* -f give alternative issue file */
-#define F_RTSCTS (1 << 4) /* -h enable RTS/CTS flow control */
-#define F_ISSUE (1 << 5) /* -i display /etc/issue */
-#define F_LOGIN (1 << 6) /* -l non-default login program */
-#define F_PARSE (1 << 7) /* -m process modem status messages */
-#define F_TIMEOUT (1 << 8) /* -t time out */
-#define F_WAITCRLF (1 << 9) /* -w wait for CR or LF */
-#define F_NOPROMPT (1 << 10) /* -n don't ask for login name */
-
-
#define line_buf bb_common_bufsiz1
-/* The following is used for understandable diagnostics. */
-#ifdef DEBUGGING
-static FILE *dbf;
-#define DEBUGTERM "/dev/ttyp0"
-#define debug(...) do { fprintf(dbf, __VA_ARGS__); fflush(dbf); } while (0)
-#else
-#define debug(...) ((void)0)
-#endif
+//usage:#define getty_trivial_usage
+//usage: "[OPTIONS] BAUD_RATE TTY [TERMTYPE]"
+//usage:#define getty_full_usage "\n\n"
+//usage: "Open a tty, prompt for a login name, then invoke /bin/login\n"
+//usage: "\nOptions:"
+//usage: "\n -h Enable hardware (RTS/CTS) flow control"
+//usage: "\n -i Don't display /etc/issue"
+//usage: "\n -L Local line, don't do carrier detect"
+//usage: "\n -m Get baud rate from modem's CONNECT status message"
+//usage: "\n -w Wait for a CR or LF before sending /etc/issue"
+//usage: "\n -n Don't prompt the user for a login name"
+//usage: "\n -f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue"
+//usage: "\n -l LOGIN Invoke LOGIN instead of /bin/login"
+//usage: "\n -t SEC Terminate after SEC if no username is read"
+//usage: "\n -I INITSTR Send INITSTR before anything else"
+//usage: "\n -H HOST Log HOST into the utmp file as the hostname"
+
+static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
+#define F_INITSTRING (1 << 0) /* -I */
+#define F_LOCAL (1 << 1) /* -L */
+#define F_FAKEHOST (1 << 2) /* -H */
+#define F_CUSTISSUE (1 << 3) /* -f */
+#define F_RTSCTS (1 << 4) /* -h */
+#define F_NOISSUE (1 << 5) /* -i */
+#define F_LOGIN (1 << 6) /* -l */
+#define F_PARSE (1 << 7) /* -m */
+#define F_TIMEOUT (1 << 8) /* -t */
+#define F_WAITCRLF (1 << 9) /* -w */
+#define F_NOPROMPT (1 << 10) /* -n */
/* bcode - convert speed string to speed code; return <= 0 on failure */
@@ -181,18 +199,18 @@ static void parse_speeds(struct options *op, char *arg)
static void parse_args(char **argv, struct options *op, char **fakehost_p)
{
char *ts;
+ int flags;
opt_complementary = "-2:t+"; /* at least 2 args; -t N */
- op->flags = getopt32(argv, opt_string,
+ flags = getopt32(argv, opt_string,
&(op->initstring), fakehost_p, &(op->issue),
&(op->login), &op->timeout);
- argv += optind;
- if (op->flags & F_INITSTRING) {
+ if (flags & F_INITSTRING) {
op->initstring = xstrdup(op->initstring);
/* decode \ddd octal codes into chars */
strcpy_and_process_escape_sequences((char*)op->initstring, op->initstring);
}
- op->flags ^= F_ISSUE; /* invert flag "show /etc/issue" */
+ argv += optind;
debug("after getopt\n");
/* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
@@ -217,17 +235,6 @@ static void open_tty(const char *tty)
{
/* Set up new standard input, unless we are given an already opened port. */
if (NOT_LONE_DASH(tty)) {
-// struct stat st;
-// int cur_dir_fd;
-// int fd;
-
- /* Sanity checks... */
-// cur_dir_fd = xopen(".", O_DIRECTORY | O_NONBLOCK);
-// xchdir("/dev");
-// xstat(tty, &st);
-// if (!S_ISCHR(st.st_mode))
-// bb_error_msg_and_die("not a character device");
-
if (tty[0] != '/')
tty = xasprintf("/dev/%s", tty); /* will leak it */
@@ -236,15 +243,6 @@ static void open_tty(const char *tty)
close(0);
/*fd =*/ xopen(tty, O_RDWR | O_NONBLOCK); /* uses fd 0 */
-// /* Restore current directory */
-// fchdir(cur_dir_fd);
-
- /* Open the tty as standard input, continued */
-// xmove_fd(fd, 0);
-// /* fd is >= cur_dir_fd, and cur_dir_fd gets closed too here: */
-// while (fd > 2)
-// close(fd--);
-
/* Set proper protections and ownership. */
fchown(0, 0, 0); /* 0:0 */
fchmod(0, 0620); /* crw--w---- */
@@ -259,7 +257,7 @@ static void open_tty(const char *tty)
}
/* termios_init - initialize termios settings */
-static void termios_init(struct termios *tp, int speed, struct options *op)
+static void termios_init(struct termios *tp, int speed)
{
speed_t ispeed, ospeed;
/*
@@ -278,7 +276,7 @@ static void termios_init(struct termios *tp, int speed, struct options *op)
ospeed = cfgetospeed(tp);
}
tp->c_cflag = CS8 | HUPCL | CREAD;
- if (op->flags & F_LOCAL)
+ if (option_mask32 & F_LOCAL)
tp->c_cflag |= CLOCAL;
cfsetispeed(tp, ispeed);
cfsetospeed(tp, ospeed);
@@ -293,7 +291,7 @@ static void termios_init(struct termios *tp, int speed, struct options *op)
/* Optionally enable hardware flow control */
#ifdef CRTSCTS
- if (op->flags & F_RTSCTS)
+ if (option_mask32 & F_RTSCTS)
tp->c_cflag |= CRTSCTS;
#endif
@@ -364,7 +362,8 @@ static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
static void do_prompt(struct options *op)
{
#ifdef ISSUE
- print_login_issue(op->issue, op->tty);
+ if (!(option_mask32 & F_NOISSUE))
+ print_login_issue(op->issue, op->tty);
#endif
print_login_prompt();
}
@@ -429,7 +428,7 @@ static char *get_logname(char *logname, unsigned size_logname,
return NULL;
/* Do parity bit handling. */
- if (!(op->flags & F_LOCAL) && (c & 0x80)) { /* "parity" bit on? */
+ if (!(option_mask32 & F_LOCAL) && (c & 0x80)) { /* "parity" bit on? */
bits = 1;
mask = 1;
while (mask & 0x7f) {
@@ -499,7 +498,7 @@ static char *get_logname(char *logname, unsigned size_logname,
}
/* termios_final - set the final tty mode bits */
-static void termios_final(struct options *op, struct termios *tp, struct chardata *cp)
+static void termios_final(struct termios *tp, struct chardata *cp)
{
/* General terminal-independent stuff. */
tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */
@@ -554,7 +553,7 @@ static void termios_final(struct options *op, struct termios *tp, struct chardat
#endif
/* Optionally enable hardware flow control */
#ifdef CRTSCTS
- if (op->flags & F_RTSCTS)
+ if (option_mask32 & F_RTSCTS)
tp->c_cflag |= CRTSCTS;
#endif
@@ -655,24 +654,24 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
/* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */
debug("calling termios_init\n");
- termios_init(&termios, options.speeds[0], &options);
+ termios_init(&termios, options.speeds[0]);
/* Write the modem init string and DON'T flush the buffers */
- if (options.flags & F_INITSTRING) {
+ if (option_mask32 & F_INITSTRING) {
debug("writing init string\n");
full_write1_str(options.initstring);
}
/* Optionally detect the baud rate from the modem status message */
debug("before autobaud\n");
- if (options.flags & F_PARSE)
+ if (option_mask32 & F_PARSE)
auto_baud(line_buf, sizeof(line_buf), &termios);
/* Set the optional timer */
alarm(options.timeout); /* if 0, alarm is not set */
/* Optionally wait for CR or LF before writing /etc/issue */
- if (options.flags & F_WAITCRLF) {
+ if (option_mask32 & F_WAITCRLF) {
char ch;
debug("waiting for cr-lf\n");
@@ -685,7 +684,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
}
logname = NULL;
- if (!(options.flags & F_NOPROMPT)) {
+ if (!(option_mask32 & F_NOPROMPT)) {
/* NB:termios_init already set line speed
* to options.speeds[0] */
int baud_index = 0;
@@ -709,7 +708,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
alarm(0);
/* Finalize the termios settings. */
- termios_final(&options, &termios, &chardata);
+ termios_final(&termios, &chardata);
/* Now the newline character should be properly written. */
full_write(STDOUT_FILENO, "\n", 1);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 11:34:51 +0000