aboutsummaryrefslogtreecommitdiff
path: root/coreutils
diff options
context:
space:
mode:
authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:31:44 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:31:44 +0000
commitdebaf2fe024748cd559e86eba41bb503882bf9ff (patch)
tree9e6273aa7867a32f20a9db0420846d2271f81b0d /coreutils
parent20b253d2d8e87587a3b9913ac76a49cdafa002ad (diff)
downloadbusybox-debaf2fe024748cd559e86eba41bb503882bf9ff.tar.gz
busybox-debaf2fe024748cd559e86eba41bb503882bf9ff.tar.bz2
stty: reorder code, reducing need in forward declarations.
added few missed bits of error checking for parameters.
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/stty.c409
1 files changed, 198 insertions, 211 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c
index 7fa5feb0d..378e03e90 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -371,30 +371,74 @@ enum {
/* The width of the screen, for output wrapping */
static int max_col;
-
/* Current position, to know when to wrap */
static int current_col;
+static const char *device_name = bb_msg_standard_input;
-static const char * visible(unsigned int ch);
-static int recover_mode(const char *arg, struct termios *mode);
-static int screen_columns(void);
-static void set_mode(const struct mode_info *info,
- int reversed, struct termios *mode);
-static speed_t string_to_baud(const char *arg);
-static tcflag_t* mode_type_flag(unsigned type, const struct termios *mode);
-static void display_all(const struct termios *mode);
-static void display_changed(const struct termios *mode);
-static void display_recoverable(const struct termios *mode);
-static void display_speed(const struct termios *mode, int fancy);
-static void display_window_size(int fancy);
-static void sane_mode(struct termios *mode);
-static void set_control_char_or_die(const struct control_info *info,
- const char *arg, struct termios *mode);
-static void set_speed(enum speed_setting type,
- const char *arg, struct termios *mode);
-static void set_window_size(int rows, int cols);
+/* Return a string that is the printable representation of character CH */
+/* Adapted from `cat' by Torbjorn Granlund */
+static const char *visible(unsigned int ch)
+{
+ static char buf[10];
+ char *bpout = buf;
-static const char *device_name = bb_msg_standard_input;
+ if (ch == _POSIX_VDISABLE)
+ return "<undef>";
+
+ if (ch >= 128) {
+ ch -= 128;
+ *bpout++ = 'M';
+ *bpout++ = '-';
+ }
+
+ if (ch < 32) {
+ *bpout++ = '^';
+ *bpout++ = ch + 64;
+ } else if (ch < 127) {
+ *bpout++ = ch;
+ } else {
+ *bpout++ = '^';
+ *bpout++ = '?';
+ }
+
+ *bpout = '\0';
+ return buf;
+}
+
+static tcflag_t *mode_type_flag(unsigned type, const struct termios *mode)
+{
+ static const unsigned char tcflag_offsets[] = {
+ offsetof(struct termios, c_cflag), /* control */
+ offsetof(struct termios, c_iflag), /* input */
+ offsetof(struct termios, c_oflag), /* output */
+ offsetof(struct termios, c_lflag), /* local */
+ };
+
+ if (type <= local) {
+ return (tcflag_t*) (((char*)mode) + tcflag_offsets[type]);
+ }
+ return NULL;
+}
+
+static speed_t string_to_baud_or_die(const char *arg)
+{
+ return tty_value_to_baud(bb_xparse_number(arg, 0));
+}
+
+static void set_speed_or_die(enum speed_setting type, const char *arg,
+ struct termios *mode)
+{
+ speed_t baud;
+
+ baud = string_to_baud_or_die(arg);
+
+ if (type != output_speed) { /* either input or both */
+ cfsetispeed(mode, baud);
+ }
+ if (type != input_speed) { /* either output or both */
+ cfsetospeed(mode, baud);
+ }
+}
static ATTRIBUTE_NORETURN void perror_on_device_and_die(const char *fmt)
{
@@ -438,6 +482,103 @@ static void wrapf(const char *message, ...)
current_col = 0;
}
+#ifdef TIOCGWINSZ
+
+static int get_win_size(struct winsize *win)
+{
+ return ioctl(STDIN_FILENO, TIOCGWINSZ, (char *) win);
+}
+
+static void set_window_size(int rows, int cols)
+{
+ struct winsize win;
+
+ if (get_win_size(&win)) {
+ if (errno != EINVAL) {
+ perror_on_device("%s");
+ return;
+ }
+ memset(&win, 0, sizeof(win));
+ }
+
+ if (rows >= 0)
+ win.ws_row = rows;
+ if (cols >= 0)
+ win.ws_col = cols;
+
+# ifdef TIOCSSIZE
+ /* Alexander Dupuy <dupuy@cs.columbia.edu> wrote:
+ The following code deals with a bug in the SunOS 4.x (and 3.x?) kernel.
+ This comment from sys/ttold.h describes Sun's twisted logic - a better
+ test would have been (ts_lines > 64k || ts_cols > 64k || ts_cols == 0).
+ At any rate, the problem is gone in Solaris 2.x */
+
+ if (win.ws_row == 0 || win.ws_col == 0) {
+ struct ttysize ttysz;
+
+ ttysz.ts_lines = win.ws_row;
+ ttysz.ts_cols = win.ws_col;
+
+ win.ws_row = win.ws_col = 1;
+
+ if ((ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win) != 0)
+ || (ioctl(STDIN_FILENO, TIOCSSIZE, (char *) &ttysz) != 0)) {
+ perror_on_device("%s");
+ }
+ return;
+ }
+# endif
+
+ if (ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win))
+ perror_on_device("%s");
+}
+
+static void display_window_size(int fancy)
+{
+ const char *fmt_str = "%s\0%s: no size information for this device";
+ struct winsize win;
+
+ if (get_win_size(&win)) {
+ if ((errno != EINVAL) || ((fmt_str += 2), !fancy)) {
+ perror_on_device(fmt_str);
+ }
+ } else {
+ wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
+ win.ws_row, win.ws_col);
+ }
+}
+
+#else /* !TIOCGWINSZ */
+
+static inline void display_window_size(int fancy) {}
+
+#endif /* !TIOCGWINSZ */
+
+static int screen_columns(void)
+{
+ int columns;
+ const char *s;
+
+#ifdef TIOCGWINSZ
+ struct winsize win;
+
+ /* With Solaris 2.[123], this ioctl fails and errno is set to
+ EINVAL for telnet (but not rlogin) sessions.
+ On ISC 3.0, it fails for the console and the serial port
+ (but it works for ptys).
+ It can also fail on any system when stdout isn't a tty.
+ In case of any failure, just use the default */
+ if (get_win_size(&win) == 0 && win.ws_col > 0)
+ return win.ws_col;
+#endif
+
+ columns = 80;
+ if ((s = getenv("COLUMNS"))) {
+ columns = atoi(s);
+ }
+ return columns;
+}
+
static const struct suffix_mult stty_suffixes[] = {
{"b", 512 },
{"k", 1024},
@@ -469,9 +610,9 @@ enum {
param_rows = 2 | 0x80,
param_cols = 3 | 0x80,
param_size = 4,
- param_ispeed = 5 | 0x80,
- param_ospeed = 6 | 0x80,
- param_speed = 7,
+ param_speed = 5,
+ param_ispeed = 6 | 0x80,
+ param_ospeed = 7 | 0x80,
};
static int find_param(const char *name)
@@ -485,13 +626,24 @@ static int find_param(const char *name)
if (streq(name, "columns")) return param_cols;
if (streq(name, "size")) return param_size;
#endif
+ if (streq(name, "speed")) return param_speed;
if (streq(name, "ispeed")) return param_ispeed;
if (streq(name, "ospeed")) return param_ospeed;
- if (streq(name, "speed")) return param_speed;
return 0;
}
+static int recover_mode(const char *arg, struct termios *mode);
+static void set_mode(const struct mode_info *info,
+ int reversed, struct termios *mode);
+static void display_all(const struct termios *mode);
+static void display_changed(const struct termios *mode);
+static void display_recoverable(const struct termios *mode);
+static void display_speed(const struct termios *mode, int fancy);
+static void sane_mode(struct termios *mode);
+static void set_control_char_or_die(const struct control_info *info,
+ const char *arg, struct termios *mode);
+
int stty_main(int argc, char **argv)
{
struct termios mode;
@@ -602,13 +754,19 @@ end_option:
break;
case param_size:
#endif
+ case param_speed:
+ break;
case param_ispeed:
+ /* called for the side effect of xfunc death only */
+ set_speed_or_die(input_speed, argnext, &mode);
+ break;
case param_ospeed:
- case param_speed:
+ /* called for the side effect of xfunc death only */
+ set_speed_or_die(output_speed, argnext, &mode);
break;
default:
if (recover_mode(arg, &mode) == 1) break;
- if (string_to_baud(arg) != (speed_t) -1) break;
+ if (string_to_baud_or_die(arg) != (speed_t) -1) break;
bb_error_msg_and_die("invalid argument '%s'", arg);
}
noargs = 0;
@@ -643,7 +801,6 @@ end_option:
if (verbose_output || recoverable_output || noargs) {
max_col = screen_columns();
- current_col = 0;
output_func(&mode);
return EXIT_SUCCESS;
}
@@ -697,32 +854,31 @@ end_option:
break;
case param_size:
max_col = screen_columns();
- current_col = 0;
display_window_size(0);
break;
case param_rows:
set_window_size((int) bb_xparse_number(argnext, stty_suffixes), -1);
break;
#endif
+ case param_speed:
+ max_col = screen_columns();
+ display_speed(&mode, 0);
+ break;
case param_ispeed:
- set_speed(input_speed, argnext, &mode);
+ set_speed_or_die(input_speed, argnext, &mode);
speed_was_set = 1;
require_set_attr = 1;
break;
case param_ospeed:
- set_speed(output_speed, argnext, &mode);
+ set_speed_or_die(output_speed, argnext, &mode);
speed_was_set = 1;
require_set_attr = 1;
break;
- case param_speed:
- max_col = screen_columns();
- display_speed(&mode, 0);
- break;
default:
if (recover_mode(arg, &mode) == 1)
require_set_attr = 1;
- else /* true: if (string_to_baud(arg) != (speed_t) -1) */ {
- set_speed(both_speeds, arg, &mode);
+ else /* true: if (string_to_baud_or_die(arg) != (speed_t) -1) */ {
+ set_speed_or_die(both_speeds, arg, &mode);
speed_was_set = 1;
require_set_attr = 1;
} /* else - impossible (caught in the first pass):
@@ -805,8 +961,8 @@ end_option:
#define ECHOKE 0
#endif
-static void
-set_mode(const struct mode_info *info, int reversed, struct termios *mode)
+static void set_mode(const struct mode_info *info, int reversed,
+ struct termios *mode)
{
tcflag_t *bitsp;
@@ -932,9 +1088,8 @@ set_mode(const struct mode_info *info, int reversed, struct termios *mode)
}
}
-static void
-set_control_char_or_die(const struct control_info *info, const char *arg,
- struct termios *mode)
+static void set_control_char_or_die(const struct control_info *info,
+ const char *arg, struct termios *mode)
{
unsigned char value;
@@ -945,143 +1100,14 @@ set_control_char_or_die(const struct control_info *info, const char *arg,
else if (streq(arg, "^-") || streq(arg, "undef"))
value = _POSIX_VDISABLE;
else if (arg[0] == '^') { /* Ignore any trailing junk (^Cjunk) */
+ value = arg[1] & 0x1f; /* Non-letters get weird results */
if (arg[1] == '?')
value = 127;
- else
- value = arg[1] & 0x1f; /* Non-letters get weird results */
} else
value = bb_xparse_number(arg, stty_suffixes);
mode->c_cc[info->offset] = value;
}
-static void
-set_speed(enum speed_setting type, const char *arg, struct termios *mode)
-{
- speed_t baud;
-
- baud = string_to_baud(arg);
-
- if (type != output_speed) { /* either input or both */
- cfsetispeed(mode, baud);
- }
- if (type != input_speed) { /* either output or both */
- cfsetospeed(mode, baud);
- }
-}
-
-#ifdef TIOCGWINSZ
-
-static int get_win_size(struct winsize *win)
-{
- return ioctl(STDIN_FILENO, TIOCGWINSZ, (char *) win);
-}
-
-static void
-set_window_size(int rows, int cols)
-{
- struct winsize win;
-
- if (get_win_size(&win)) {
- if (errno != EINVAL) {
- perror_on_device("%s");
- return;
- }
- memset(&win, 0, sizeof(win));
- }
-
- if (rows >= 0)
- win.ws_row = rows;
- if (cols >= 0)
- win.ws_col = cols;
-
-# ifdef TIOCSSIZE
- /* Alexander Dupuy <dupuy@cs.columbia.edu> wrote:
- The following code deals with a bug in the SunOS 4.x (and 3.x?) kernel.
- This comment from sys/ttold.h describes Sun's twisted logic - a better
- test would have been (ts_lines > 64k || ts_cols > 64k || ts_cols == 0).
- At any rate, the problem is gone in Solaris 2.x */
-
- if (win.ws_row == 0 || win.ws_col == 0) {
- struct ttysize ttysz;
-
- ttysz.ts_lines = win.ws_row;
- ttysz.ts_cols = win.ws_col;
-
- win.ws_row = win.ws_col = 1;
-
- if ((ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win) != 0)
- || (ioctl(STDIN_FILENO, TIOCSSIZE, (char *) &ttysz) != 0)) {
- perror_on_device("%s");
- }
- return;
- }
-# endif
-
- if (ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win))
- perror_on_device("%s");
-}
-
-static void display_window_size(int fancy)
-{
- const char *fmt_str = "%s\0%s: no size information for this device";
- struct winsize win;
-
- if (get_win_size(&win)) {
- if ((errno != EINVAL) || ((fmt_str += 2), !fancy)) {
- perror_on_device(fmt_str);
- }
- } else {
- wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
- win.ws_row, win.ws_col);
- }
-}
-
-#else /* !TIOCGWINSZ */
-
-static inline void display_window_size(int fancy) {}
-
-#endif /* !TIOCGWINSZ */
-
-static int screen_columns(void)
-{
- int columns;
- const char *s;
-
-#ifdef TIOCGWINSZ
- struct winsize win;
-
- /* With Solaris 2.[123], this ioctl fails and errno is set to
- EINVAL for telnet (but not rlogin) sessions.
- On ISC 3.0, it fails for the console and the serial port
- (but it works for ptys).
- It can also fail on any system when stdout isn't a tty.
- In case of any failure, just use the default */
- if (get_win_size(&win) == 0 && win.ws_col > 0)
- return win.ws_col;
-#endif
-
- columns = 80;
- if ((s = getenv("COLUMNS"))) {
- columns = atoi(s);
- }
- return columns;
-}
-
-static tcflag_t *mode_type_flag(unsigned type, const struct termios *mode)
-{
- static const unsigned char tcflag_offsets[] = {
- offsetof(struct termios, c_cflag), /* control */
- offsetof(struct termios, c_iflag), /* input */
- offsetof(struct termios, c_oflag), /* output */
- offsetof(struct termios, c_lflag), /* local */
- };
-
- if (type <= local) {
- return (tcflag_t*) (((char*)mode) + tcflag_offsets[type]);
- }
- return NULL;
-}
-
static void display_changed(const struct termios *mode)
{
int i;
@@ -1140,8 +1166,7 @@ static void display_changed(const struct termios *mode)
if (current_col) wrapf("\n");
}
-static void
-display_all(const struct termios *mode)
+static void display_all(const struct termios *mode)
{
int i;
tcflag_t *bitsp;
@@ -1214,7 +1239,6 @@ static void display_speed(const struct termios *mode, int fancy)
static void display_recoverable(const struct termios *mode)
{
int i;
-
printf("%lx:%lx:%lx:%lx",
(unsigned long) mode->c_iflag, (unsigned long) mode->c_oflag,
(unsigned long) mode->c_cflag, (unsigned long) mode->c_lflag);
@@ -1253,11 +1277,6 @@ static int recover_mode(const char *arg, struct termios *mode)
return 1;
}
-static speed_t string_to_baud(const char *arg)
-{
- return tty_value_to_baud(bb_xparse_number(arg, 0));
-}
-
static void sane_mode(struct termios *mode)
{
int i;
@@ -1283,35 +1302,3 @@ static void sane_mode(struct termios *mode)
}
}
}
-
-/* Return a string that is the printable representation of character CH */
-/* Adapted from `cat' by Torbjorn Granlund */
-
-static const char *visible(unsigned int ch)
-{
- static char buf[10];
- char *bpout = buf;
-
- if (ch == _POSIX_VDISABLE) {
- return "<undef>";
- }
-
- if (ch >= 128) {
- ch -= 128;
- *bpout++ = 'M';
- *bpout++ = '-';
- }
-
- if (ch < 32) {
- *bpout++ = '^';
- *bpout++ = ch + 64;
- } else if (ch < 127) {
- *bpout++ = ch;
- } else {
- *bpout++ = '^';
- *bpout++ = '?';
- }
-
- *bpout = '\0';
- return buf;
-}