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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:24:23 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:24:23 +0000
commit20b253d2d8e87587a3b9913ac76a49cdafa002ad (patch)
treee7fac013e5dcc49652f90841a2660c2bbe44a167 /coreutils
parent8971cdaeca82c8f8f2dc9257fc10c558d2cc77ff (diff)
downloadbusybox-20b253d2d8e87587a3b9913ac76a49cdafa002ad.tar.gz
busybox-20b253d2d8e87587a3b9913ac76a49cdafa002ad.tar.bz2
stty: convert "enum mode_type" into unnamed enum
(reduces code obfuscation); deindent set_mode; add _or_die suffixes to few functions
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/stty.c326
1 files changed, 169 insertions, 157 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c
index e60c4f589..7fa5feb0d 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -121,7 +121,7 @@ enum speed_setting {
};
/* Which member(s) of `struct termios' a mode uses */
-enum mode_type {
+enum {
/* Do NOT change the order or values, as mode_type_flag()
* depends on them */
control, input, output, local, combination
@@ -159,13 +159,11 @@ static const char stty_dec [] = "dec";
/* Each mode */
struct mode_info {
const char *name; /* Name given on command line */
- /* enum mode_type type; */
char type; /* Which structure element to change */
char flags; /* Setting and display options */
unsigned short mask; /* Other bits to turn off for this mode */
unsigned long bits; /* Bits to set for this mode */
};
-#define EMT(t) ((enum mode_type)(t))
#define MI_ENTRY(N,T,F,B,M) { N, T, F, M, B }
@@ -383,14 +381,14 @@ 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(enum mode_type type, const struct termios *mode);
+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(const struct control_info *info,
+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);
@@ -398,11 +396,16 @@ static void set_window_size(int rows, int cols);
static const char *device_name = bb_msg_standard_input;
-static ATTRIBUTE_NORETURN void perror_on_device(const char *fmt)
+static ATTRIBUTE_NORETURN void perror_on_device_and_die(const char *fmt)
{
bb_perror_msg_and_die(fmt, device_name);
}
+static void perror_on_device(const char *fmt)
+{
+ bb_perror_msg(fmt, device_name);
+}
+
/* No, inline won't be as efficient (gcc 3.4.3) */
#define streq(a,b) (!strcmp((a),(b)))
@@ -570,6 +573,8 @@ end_option:
if (cp) {
if (!argnext)
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);
noargs = 0;
++k;
continue;
@@ -627,14 +632,14 @@ end_option:
}
fdflags = fcntl(STDIN_FILENO, F_GETFL);
if (fdflags == -1 || fcntl(STDIN_FILENO, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
- perror_on_device("%s: couldn't reset non-blocking mode");
+ perror_on_device_and_die("%s: couldn't reset non-blocking mode");
}
/* Initialize to all zeroes so there is no risk memcmp will report a
spurious difference in an uninitialized portion of the structure */
memset(&mode, 0, sizeof(mode));
if (tcgetattr(STDIN_FILENO, &mode))
- perror_on_device("%s");
+ perror_on_device_and_die("%s");
if (verbose_output || recoverable_output || noargs) {
max_col = screen_columns();
@@ -670,7 +675,7 @@ end_option:
cp = find_control(arg);
if (cp) {
++k;
- set_control_char(cp, argnext, &mode);
+ set_control_char_or_die(cp, argnext, &mode);
continue;
}
@@ -729,7 +734,7 @@ end_option:
struct termios new_mode;
if (tcsetattr(STDIN_FILENO, TCSADRAIN, &mode))
- perror_on_device("%s");
+ perror_on_device_and_die("%s");
/* POSIX (according to Zlotnick's book) tcsetattr returns zero if
it performs *any* of the requested operations. This means it
@@ -742,7 +747,7 @@ end_option:
spurious difference in an uninitialized portion of the structure */
memset(&new_mode, 0, sizeof(new_mode));
if (tcgetattr(STDIN_FILENO, &new_mode))
- perror_on_device("%s");
+ perror_on_device_and_die("%s");
if (memcmp(&mode, &new_mode, sizeof(mode)) != 0) {
#ifdef CIBAUD
@@ -758,7 +763,7 @@ end_option:
new_mode.c_cflag &= (~CIBAUD);
if (speed_was_set || memcmp(&mode, &new_mode, sizeof(mode)) != 0)
#endif
- perror_on_device ("%s: unable to perform all requested operations");
+ perror_on_device_and_die ("%s: unable to perform all requested operations");
}
}
@@ -805,127 +810,130 @@ set_mode(const struct mode_info *info, int reversed, struct termios *mode)
{
tcflag_t *bitsp;
- bitsp = mode_type_flag(EMT(info->type), mode);
-
- if (bitsp == NULL) {
- /* Combination mode */
- if (info->name == evenp || info->name == parity) {
- if (reversed)
- mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
- else
- mode->c_cflag =
- (mode->c_cflag & ~PARODD & ~CSIZE) | PARENB | CS7;
- } else if (info->name == stty_oddp) {
- if (reversed)
- mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
- else
- mode->c_cflag =
- (mode->c_cflag & ~CSIZE) | CS7 | PARODD | PARENB;
- } else if (info->name == stty_nl) {
- if (reversed) {
- mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
- mode->c_oflag = (mode->c_oflag | ONLCR) & ~OCRNL & ~ONLRET;
- } else {
- mode->c_iflag = mode->c_iflag & ~ICRNL;
- if (ONLCR) mode->c_oflag = mode->c_oflag & ~ONLCR;
- }
- } else if (info->name == stty_ek) {
- mode->c_cc[VERASE] = CERASE;
- mode->c_cc[VKILL] = CKILL;
- } else if (info->name == stty_sane)
- sane_mode(mode);
- else if (info->name == cbreak) {
- if (reversed)
- mode->c_lflag |= ICANON;
- else
- mode->c_lflag &= ~ICANON;
- } else if (info->name == stty_pass8) {
- if (reversed) {
- mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
- mode->c_iflag |= ISTRIP;
- } else {
- mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
- mode->c_iflag &= ~ISTRIP;
- }
- } else if (info->name == litout) {
- if (reversed) {
- mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
- mode->c_iflag |= ISTRIP;
- mode->c_oflag |= OPOST;
- } else {
- mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
- mode->c_iflag &= ~ISTRIP;
- mode->c_oflag &= ~OPOST;
- }
- } else if (info->name == raw || info->name == cooked) {
- if ((info->name[0] == 'r' && reversed)
- || (info->name[0] == 'c' && !reversed)) {
- /* Cooked mode */
- mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON;
- mode->c_oflag |= OPOST;
- mode->c_lflag |= ISIG | ICANON;
-#if VMIN == VEOF
- mode->c_cc[VEOF] = CEOF;
-#endif
-#if VTIME == VEOL
- mode->c_cc[VEOL] = CEOL;
-#endif
- } else {
- /* Raw mode */
- mode->c_iflag = 0;
- mode->c_oflag &= ~OPOST;
- mode->c_lflag &= ~(ISIG | ICANON | XCASE);
- mode->c_cc[VMIN] = 1;
- mode->c_cc[VTIME] = 0;
- }
- }
- else if (IXANY && info->name == decctlq) {
- if (reversed)
- mode->c_iflag |= IXANY;
- else
- mode->c_iflag &= ~IXANY;
+ bitsp = mode_type_flag(info->type, mode);
+
+ if (bitsp) {
+ if (reversed)
+ *bitsp = *bitsp & ~((unsigned long)info->mask) & ~info->bits;
+ else
+ *bitsp = (*bitsp & ~((unsigned long)info->mask)) | info->bits;
+ return;
+ }
+
+ /* Combination mode */
+ if (info->name == evenp || info->name == parity) {
+ if (reversed)
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ else
+ mode->c_cflag = (mode->c_cflag & ~PARODD & ~CSIZE) | PARENB | CS7;
+ } else if (info->name == stty_oddp) {
+ if (reversed)
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ else
+ mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARODD | PARENB;
+ } else if (info->name == stty_nl) {
+ if (reversed) {
+ mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
+ mode->c_oflag = (mode->c_oflag | ONLCR) & ~OCRNL & ~ONLRET;
+ } else {
+ mode->c_iflag = mode->c_iflag & ~ICRNL;
+ if (ONLCR) mode->c_oflag = mode->c_oflag & ~ONLCR;
}
- else if (TABDLY && info->name == stty_tabs) {
- if (reversed)
- mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
- else
- mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
+ } else if (info->name == stty_ek) {
+ mode->c_cc[VERASE] = CERASE;
+ mode->c_cc[VKILL] = CKILL;
+ } else if (info->name == stty_sane) {
+ sane_mode(mode);
+ }
+ else if (info->name == cbreak) {
+ if (reversed)
+ mode->c_lflag |= ICANON;
+ else
+ mode->c_lflag &= ~ICANON;
+ } else if (info->name == stty_pass8) {
+ if (reversed) {
+ mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
+ mode->c_iflag |= ISTRIP;
+ } else {
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ mode->c_iflag &= ~ISTRIP;
}
- else if (OXTABS && info->name == stty_tabs) {
- if (reversed)
- mode->c_oflag = mode->c_oflag | OXTABS;
- else
- mode->c_oflag = mode->c_oflag & ~OXTABS;
+ } else if (info->name == litout) {
+ if (reversed) {
+ mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
+ mode->c_iflag |= ISTRIP;
+ mode->c_oflag |= OPOST;
+ } else {
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ mode->c_iflag &= ~ISTRIP;
+ mode->c_oflag &= ~OPOST;
}
- else if (XCASE && IUCLC && OLCUC
- && (info->name == stty_lcase || info->name == stty_LCASE)) {
- if (reversed) {
- mode->c_lflag &= ~XCASE;
- mode->c_iflag &= ~IUCLC;
- mode->c_oflag &= ~OLCUC;
- } else {
- mode->c_lflag |= XCASE;
- mode->c_iflag |= IUCLC;
- mode->c_oflag |= OLCUC;
- }
+ } else if (info->name == raw || info->name == cooked) {
+ if ((info->name[0] == 'r' && reversed)
+ || (info->name[0] == 'c' && !reversed)) {
+ /* Cooked mode */
+ mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON;
+ mode->c_oflag |= OPOST;
+ mode->c_lflag |= ISIG | ICANON;
+#if VMIN == VEOF
+ mode->c_cc[VEOF] = CEOF;
+#endif
+#if VTIME == VEOL
+ mode->c_cc[VEOL] = CEOL;
+#endif
+ } else {
+ /* Raw mode */
+ mode->c_iflag = 0;
+ mode->c_oflag &= ~OPOST;
+ mode->c_lflag &= ~(ISIG | ICANON | XCASE);
+ mode->c_cc[VMIN] = 1;
+ mode->c_cc[VTIME] = 0;
}
- else if (info->name == stty_crt)
- mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
- else if (info->name == stty_dec) {
- mode->c_cc[VINTR] = 3; /* ^C */
- mode->c_cc[VERASE] = 127; /* DEL */
- mode->c_cc[VKILL] = 21; /* ^U */
- mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
- if (IXANY) mode->c_iflag &= ~IXANY;
+ }
+ else if (IXANY && info->name == decctlq) {
+ if (reversed)
+ mode->c_iflag |= IXANY;
+ else
+ mode->c_iflag &= ~IXANY;
+ }
+ else if (TABDLY && info->name == stty_tabs) {
+ if (reversed)
+ mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
+ else
+ mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
+ }
+ else if (OXTABS && info->name == stty_tabs) {
+ if (reversed)
+ mode->c_oflag |= OXTABS;
+ else
+ mode->c_oflag &= ~OXTABS;
+ }
+ else if (XCASE && IUCLC && OLCUC
+ && (info->name == stty_lcase || info->name == stty_LCASE)) {
+ if (reversed) {
+ mode->c_lflag &= ~XCASE;
+ mode->c_iflag &= ~IUCLC;
+ mode->c_oflag &= ~OLCUC;
+ } else {
+ mode->c_lflag |= XCASE;
+ mode->c_iflag |= IUCLC;
+ mode->c_oflag |= OLCUC;
}
- } else if (reversed)
- *bitsp = *bitsp & ~((unsigned long)info->mask) & ~info->bits;
- else
- *bitsp = (*bitsp & ~((unsigned long)info->mask)) | info->bits;
+ }
+ else if (info->name == stty_crt) {
+ mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
+ }
+ else if (info->name == stty_dec) {
+ mode->c_cc[VINTR] = 3; /* ^C */
+ mode->c_cc[VERASE] = 127; /* DEL */
+ mode->c_cc[VKILL] = 21; /* ^U */
+ mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
+ if (IXANY) mode->c_iflag &= ~IXANY;
+ }
}
static void
-set_control_char(const struct control_info *info, const char *arg,
+set_control_char_or_die(const struct control_info *info, const char *arg,
struct termios *mode)
{
unsigned char value;
@@ -936,11 +944,11 @@ set_control_char(const struct control_info *info, const char *arg,
value = arg[0];
else if (streq(arg, "^-") || streq(arg, "undef"))
value = _POSIX_VDISABLE;
- else if (arg[0] == '^' && arg[1] != '\0') { /* Ignore any trailing junk */
+ else if (arg[0] == '^') { /* Ignore any trailing junk (^Cjunk) */
if (arg[1] == '?')
value = 127;
else
- value = arg[1] & ~0140; /* Non-letters get weird results */
+ value = arg[1] & 0x1f; /* Non-letters get weird results */
} else
value = bb_xparse_number(arg, stty_suffixes);
mode->c_cc[info->offset] = value;
@@ -963,9 +971,9 @@ set_speed(enum speed_setting type, const char *arg, struct termios *mode)
#ifdef TIOCGWINSZ
-static int get_win_size(int fd, struct winsize *win)
+static int get_win_size(struct winsize *win)
{
- return ioctl(fd, TIOCGWINSZ, (char *) win);
+ return ioctl(STDIN_FILENO, TIOCGWINSZ, (char *) win);
}
static void
@@ -973,9 +981,11 @@ set_window_size(int rows, int cols)
{
struct winsize win;
- if (get_win_size(STDIN_FILENO, &win)) {
- if (errno != EINVAL)
+ if (get_win_size(&win)) {
+ if (errno != EINVAL) {
perror_on_device("%s");
+ return;
+ }
memset(&win, 0, sizeof(win));
}
@@ -1000,7 +1010,7 @@ set_window_size(int rows, int cols)
win.ws_row = win.ws_col = 1;
if ((ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win) != 0)
- || (ioctl(STDIN_FILENO, TIOCSSIZE, (char *) &ttysz) != 0)) {
+ || (ioctl(STDIN_FILENO, TIOCSSIZE, (char *) &ttysz) != 0)) {
perror_on_device("%s");
}
return;
@@ -1013,19 +1023,24 @@ set_window_size(int rows, int cols)
static void display_window_size(int fancy)
{
- const char *fmt_str = "%s" "\0" "%s: no size information for this device";
+ const char *fmt_str = "%s\0%s: no size information for this device";
struct winsize win;
- if (get_win_size(STDIN_FILENO, &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);
+ win.ws_row, win.ws_col);
}
}
-#endif
+
+#else /* !TIOCGWINSZ */
+
+static inline void display_window_size(int fancy) {}
+
+#endif /* !TIOCGWINSZ */
static int screen_columns(void)
{
@@ -1041,7 +1056,7 @@ static int screen_columns(void)
(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(STDOUT_FILENO, &win) == 0 && win.ws_col > 0)
+ if (get_win_size(&win) == 0 && win.ws_col > 0)
return win.ws_col;
#endif
@@ -1052,17 +1067,17 @@ static int screen_columns(void)
return columns;
}
-static tcflag_t *mode_type_flag(enum mode_type type, const struct termios *mode)
+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 */
+ offsetof(struct termios, c_lflag), /* local */
};
- if (((unsigned int) type) <= local) {
- return (tcflag_t *)(((char *) mode) + tcflag_offsets[(int)type]);
+ if (type <= local) {
+ return (tcflag_t*) (((char*)mode) + tcflag_offsets[type]);
}
return NULL;
}
@@ -1072,7 +1087,7 @@ static void display_changed(const struct termios *mode)
int i;
tcflag_t *bitsp;
unsigned long mask;
- enum mode_type prev_type = control;
+ int prev_type = control;
display_speed(mode, 1);
#ifdef HAVE_C_LINE
@@ -1107,12 +1122,12 @@ static void display_changed(const struct termios *mode)
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & OMIT)
continue;
- if (EMT(mode_info[i].type) != prev_type) {
+ if (mode_info[i].type != prev_type) {
if (current_col) wrapf("\n");
- prev_type = EMT(mode_info[i].type);
+ prev_type = mode_info[i].type;
}
- bitsp = mode_type_flag(EMT(mode_info[i].type), mode);
+ bitsp = mode_type_flag(mode_info[i].type, mode);
mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
if ((*bitsp & mask) == mode_info[i].bits) {
if (mode_info[i].flags & SANE_UNSET) {
@@ -1131,12 +1146,10 @@ display_all(const struct termios *mode)
int i;
tcflag_t *bitsp;
unsigned long mask;
- enum mode_type prev_type = control;
+ int prev_type = control;
display_speed(mode, 1);
-#ifdef TIOCGWINSZ
display_window_size(1);
-#endif
#ifdef HAVE_C_LINE
wrapf("line = %d;\n", mode->c_line);
#else
@@ -1167,13 +1180,12 @@ display_all(const struct termios *mode)
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & OMIT)
continue;
- if (EMT(mode_info[i].type) != prev_type) {
- putchar('\n');
- current_col = 0;
- prev_type = EMT(mode_info[i].type);
+ if (mode_info[i].type != prev_type) {
+ wrapf("\n");
+ prev_type = mode_info[i].type;
}
- bitsp = mode_type_flag(EMT(mode_info[i].type), mode);
+ bitsp = mode_type_flag(mode_info[i].type, mode);
mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
if ((*bitsp & mask) == mode_info[i].bits)
wrapf("%s", mode_info[i].name);
@@ -1185,14 +1197,14 @@ display_all(const struct termios *mode)
static void display_speed(const struct termios *mode, int fancy)
{
- //12345678 9 10
+ //01234567 8 9
const char *fmt_str = "%lu %lu\n\0ispeed %lu baud; ospeed %lu baud;";
unsigned long ispeed, ospeed;
ospeed = ispeed = cfgetispeed(mode);
if (ispeed == 0 || ispeed == (ospeed = cfgetospeed(mode))) {
ispeed = ospeed; /* in case ispeed was 0 */
- //1234 5 6 7 8 9 10
+ //0123 4 5 6 7 8 9
fmt_str = "%lu\n\0\0\0\0\0speed %lu baud;";
}
if (fancy) fmt_str += 9;
@@ -1261,11 +1273,11 @@ static void sane_mode(struct termios *mode)
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & SANE_SET) {
- bitsp = mode_type_flag(EMT(mode_info[i].type), mode);
+ bitsp = mode_type_flag(mode_info[i].type, mode);
*bitsp = (*bitsp & ~((unsigned long)mode_info[i].mask))
| mode_info[i].bits;
} else if (mode_info[i].flags & SANE_UNSET) {
- bitsp = mode_type_flag(EMT(mode_info[i].type), mode);
+ bitsp = mode_type_flag(mode_info[i].type, mode);
*bitsp = *bitsp & ~((unsigned long)mode_info[i].mask)
& ~mode_info[i].bits;
}