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stop using global variable needlessly

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This commit is contained in:
Denis Vlasenko 2007-01-18 00:53:35 +00:00
parent cbbc043d1b
commit 41aaefce71
1 changed files with 30 additions and 28 deletions
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58
coreutils/stty.c
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@ -901,19 +901,21 @@ static void set_control_char_or_die(const struct control_info *info,
mode->c_cc[info->offset] = value;
}
#define STTY_require_set_attr (1<<0)
#define STTY_speed_was_set (1<<1)
#define STTY_verbose_output (1<<2)
#define STTY_recoverable_output (1<<3)
#define STTY_noargs (1<<4)
#define STTY_require_set_attr (1<<0)
#define STTY_speed_was_set (1<<1)
#define STTY_verbose_output (1<<2)
#define STTY_recoverable_output (1<<3)
#define STTY_noargs (1<<4)
int stty_main(int argc, char **argv)
{
struct termios mode;
void (*output_func)(const struct termios *, const int);
const char *file_name = NULL;
int k;
int display_all = 0;
option_mask32 = STTY_noargs;
int stty_state;
int k;
stty_state = STTY_noargs;
output_func = do_display;
/* First pass: only parse/verify command line params */
@ -931,7 +933,7 @@ int stty_main(int argc, char **argv)
if (mp) {
if (!(mp->flags & REV))
goto invalid_argument;
option_mask32 &= ~STTY_noargs;
stty_state &= ~STTY_noargs;
continue;
}
/* It is an option - parse it */
@ -939,12 +941,12 @@ int stty_main(int argc, char **argv)
while (arg[++i]) {
switch (arg[i]) {
case 'a':
option_mask32 |= STTY_verbose_output;
stty_state |= STTY_verbose_output;
output_func = do_display;
display_all = 1;
break;
case 'g':
option_mask32 |= STTY_recoverable_output;
stty_state |= STTY_recoverable_output;
output_func = display_recoverable;
break;
case 'F':
@ -971,7 +973,7 @@ end_option:
mp = find_mode(arg);
if (mp) {
option_mask32 &= ~STTY_noargs;
stty_state &= ~STTY_noargs;
continue;
}
@ -981,7 +983,7 @@ end_option:
bb_error_msg_and_die(bb_msg_requires_arg, arg);
/* called for the side effect of xfunc death only */
set_control_char_or_die(cp, argnext, &mode);
option_mask32 &= ~STTY_noargs;
stty_state &= ~STTY_noargs;
++k;
continue;
}
@ -1024,16 +1026,16 @@ end_option:
invalid_argument:
bb_error_msg_and_die("invalid argument '%s'", arg);
}
option_mask32 &= ~STTY_noargs;
stty_state &= ~STTY_noargs;
}
/* Specifying both -a and -g is an error */
if ((option_mask32 & (STTY_verbose_output | STTY_recoverable_output)) ==
if ((stty_state & (STTY_verbose_output | STTY_recoverable_output)) ==
(STTY_verbose_output | STTY_recoverable_output))
bb_error_msg_and_die("verbose and stty-readable output styles are mutually exclusive");
/* Specifying -a or -g with non-options is an error */
if (!(option_mask32 & STTY_noargs) &&
(option_mask32 & (STTY_verbose_output | STTY_recoverable_output)))
if (!(stty_state & STTY_noargs) &&
(stty_state & (STTY_verbose_output | STTY_recoverable_output)))
bb_error_msg_and_die("modes may not be set when specifying an output style");
/* Now it is safe to start doing things */
@ -1057,7 +1059,7 @@ invalid_argument:
if (tcgetattr(STDIN_FILENO, &mode))
perror_on_device_and_die("%s");
if (option_mask32 & (STTY_verbose_output | STTY_recoverable_output | STTY_noargs)) {
if (stty_state & (STTY_verbose_output | STTY_recoverable_output | STTY_noargs)) {
get_terminal_width_height(STDOUT_FILENO, &max_col, NULL);
output_func(&mode, display_all);
return EXIT_SUCCESS;
@ -1076,7 +1078,7 @@ invalid_argument:
mp = find_mode(arg+1);
if (mp) {
set_mode(mp, 1 /* reversed */, &mode);
option_mask32 |= STTY_require_set_attr;
stty_state |= STTY_require_set_attr;
}
/* It is an option - already parsed. Skip it */
continue;
@ -1085,7 +1087,7 @@ invalid_argument:
mp = find_mode(arg);
if (mp) {
set_mode(mp, 0 /* non-reversed */, &mode);
option_mask32 |= STTY_require_set_attr;
stty_state |= STTY_require_set_attr;
continue;
}
@ -1093,7 +1095,7 @@ invalid_argument:
if (cp) {
++k;
set_control_char_or_die(cp, argnext, &mode);
option_mask32 |= STTY_require_set_attr;
stty_state |= STTY_require_set_attr;
continue;
}
@ -1106,7 +1108,7 @@ invalid_argument:
#ifdef HAVE_C_LINE
case param_line:
mode.c_line = xatoul_sfx(argnext, stty_suffixes);
option_mask32 |= STTY_require_set_attr;
stty_state |= STTY_require_set_attr;
break;
#endif
#ifdef TIOCGWINSZ
@ -1125,24 +1127,24 @@ invalid_argument:
break;
case param_ispeed:
set_speed_or_die(input_speed, argnext, &mode);
option_mask32 |= (STTY_require_set_attr | STTY_speed_was_set);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
break;
case param_ospeed:
set_speed_or_die(output_speed, argnext, &mode);
option_mask32 |= (STTY_require_set_attr | STTY_speed_was_set);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
break;
default:
if (recover_mode(arg, &mode) == 1)
option_mask32 |= STTY_require_set_attr;
stty_state |= STTY_require_set_attr;
else /* true: if (tty_value_to_baud(xatou(arg)) != (speed_t) -1) */{
set_speed_or_die(both_speeds, arg, &mode);
option_mask32 |= (STTY_require_set_attr | STTY_speed_was_set);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
} /* else - impossible (caught in the first pass):
bb_error_msg_and_die("invalid argument '%s'", arg); */
}
}
if (option_mask32 & STTY_require_set_attr) {
if (stty_state & STTY_require_set_attr) {
struct termios new_mode;
if (tcsetattr(STDIN_FILENO, TCSADRAIN, &mode))
@ -1173,8 +1175,8 @@ invalid_argument:
error for a true failure to set the baud rate */
new_mode.c_cflag &= (~CIBAUD);
if (option_mask32 & STTY_speed_was_set ||
memcmp(&mode, &new_mode, sizeof(mode)) != 0)
if ((stty_state & STTY_speed_was_set)
|| memcmp(&mode, &new_mode, sizeof(mode)) != 0)
#endif
perror_on_device_and_die("%s: cannot perform all requested operations");
}