diff options
Diffstat (limited to 'coreutils/stty.c')
| -rw-r--r-- | coreutils/stty.c | 195 |
1 files changed, 93 insertions, 102 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c index a63c1d1..6f14efe 100644 --- a/coreutils/stty.c +++ b/coreutils/stty.c @@ -23,17 +23,14 @@ #include "busybox.h" -#define STREQ(a, b) (strcmp ((a), (b)) == 0) - - #ifndef _POSIX_VDISABLE # define _POSIX_VDISABLE ((unsigned char) 0) #endif #define Control(c) ((c) & 0x1f) -/* Canonical values for control characters. */ +/* Canonical values for control characters */ #ifndef CINTR -# define CINTR Control ('c') +# define CINTR Control('c') #endif #ifndef CQUIT # define CQUIT 28 @@ -42,27 +39,27 @@ # define CERASE 127 #endif #ifndef CKILL -# define CKILL Control ('u') +# define CKILL Control('u') #endif #ifndef CEOF -# define CEOF Control ('d') +# define CEOF Control('d') #endif #ifndef CEOL # define CEOL _POSIX_VDISABLE #endif #ifndef CSTART -# define CSTART Control ('q') +# define CSTART Control('q') #endif #ifndef CSTOP -# define CSTOP Control ('s') +# define CSTOP Control('s') #endif #ifndef CSUSP -# define CSUSP Control ('z') +# define CSUSP Control('z') #endif #if defined(VEOL2) && !defined(CEOL2) # define CEOL2 _POSIX_VDISABLE #endif -/* ISC renamed swtch to susp for termios, but we'll accept either name. */ +/* ISC renamed swtch to susp for termios, but we'll accept either name */ #if defined(VSUSP) && !defined(VSWTCH) # define VSWTCH VSUSP # define CSWTCH CSUSP @@ -82,19 +79,19 @@ # define VWERASE VWERSE #endif #if defined(VDSUSP) && !defined (CDSUSP) -# define CDSUSP Control ('y') +# define CDSUSP Control('y') #endif #if !defined(VREPRINT) && defined(VRPRNT) /* Irix 4.0.5 */ # define VREPRINT VRPRNT #endif #if defined(VREPRINT) && !defined(CRPRNT) -# define CRPRNT Control ('r') +# define CRPRNT Control('r') #endif #if defined(VWERASE) && !defined(CWERASE) -# define CWERASE Control ('w') +# define CWERASE Control('w') #endif #if defined(VLNEXT) && !defined(CLNEXT) -# define CLNEXT Control ('v') +# define CLNEXT Control('v') #endif #if defined(VDISCARD) && !defined(VFLUSHO) # define VFLUSHO VDISCARD @@ -112,25 +109,24 @@ # define ECHOKE CRTKIL #endif #if defined(VFLUSHO) && !defined(CFLUSHO) -# define CFLUSHO Control ('o') +# define CFLUSHO Control('o') #endif #if defined(VSTATUS) && !defined(CSTATUS) -# define CSTATUS Control ('t') +# define CSTATUS Control('t') #endif -/* Which speeds to set. */ +/* Which speeds to set */ enum speed_setting { input_speed, output_speed, both_speeds }; -/* Which member(s) of `struct termios' a mode uses. */ +/* Which member(s) of `struct termios' a mode uses */ enum mode_type { /* Do NOT change the order or values, as mode_type_flag() - * depends on them. */ + * depends on them */ control, input, output, local, combination }; - static const char evenp [] = "evenp"; static const char raw [] = "raw"; static const char stty_min [] = "min"; @@ -154,22 +150,22 @@ static const char stty_LCASE[] = "LCASE"; static const char stty_crt [] = "crt"; static const char stty_dec [] = "dec"; +/* Flags for `struct mode_info' */ +#define SANE_SET 1 /* Set in `sane' mode */ +#define SANE_UNSET 2 /* Unset in `sane' mode */ +#define REV 4 /* Can be turned off by prepending `-' */ +#define OMIT 8 /* Don't display value */ -/* Flags for `struct mode_info'. */ -#define SANE_SET 1 /* Set in `sane' mode. */ -#define SANE_UNSET 2 /* Unset in `sane' mode. */ -#define REV 4 /* Can be turned off by prepending `-'. */ -#define OMIT 8 /* Don't display value. */ - -/* Each mode. */ +/* Each mode */ struct mode_info { - const char *name; /* Name given on command line. */ + 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. */ + 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 } @@ -308,7 +304,7 @@ static const struct mode_info mode_info[] = { #ifdef IXANY MI_ENTRY(decctlq, combination, REV | OMIT, 0, 0 ), #endif -#if defined (TABDLY) || defined (OXTABS) +#if defined(TABDLY) || defined(OXTABS) MI_ENTRY(stty_tabs, combination, REV | OMIT, 0, 0 ), #endif #if defined(XCASE) && defined(IUCLC) && defined(OLCUC) @@ -320,18 +316,17 @@ static const struct mode_info mode_info[] = { }; enum { - NUM_mode_info = - (sizeof(mode_info) / sizeof(struct mode_info)) + NUM_mode_info = (sizeof(mode_info) / sizeof(mode_info[0])) }; -/* Control character settings. */ +/* Control character settings */ struct control_info { - const char *name; /* Name given on command line. */ - unsigned char saneval; /* Value to set for `stty sane'. */ - unsigned char offset; /* Offset in c_cc. */ + const char *name; /* Name given on command line */ + unsigned char saneval; /* Value to set for `stty sane' */ + unsigned char offset; /* Offset in c_cc */ }; -/* Control characters. */ +/* Control characters */ static const struct control_info control_info[] = { {"intr", CINTR, VINTR}, @@ -367,17 +362,20 @@ static const struct control_info control_info[] = { #ifdef VSTATUS {"status", CSTATUS, VSTATUS}, #endif - /* These must be last because of the display routines. */ + /* These must be last because of the display routines */ {stty_min, 1, VMIN}, {stty_time, 0, VTIME}, }; enum { - NUM_control_info = - (sizeof(control_info) / sizeof(struct control_info)) + NUM_control_info = (sizeof(control_info) / sizeof(control_info[0])) }; -#define EMT(t) ((enum mode_type)(t)) +/* 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 * visible(unsigned int ch); static int recover_mode(const char *arg, struct termios *mode); @@ -385,11 +383,11 @@ 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, struct termios *mode); -static void display_all(struct termios *mode); -static void display_changed(struct termios *mode); -static void display_recoverable(struct termios *mode); -static void display_speed(struct termios *mode, int fancy); +static tcflag_t* mode_type_flag(enum mode_type 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, @@ -405,21 +403,19 @@ static ATTRIBUTE_NORETURN void perror_on_device(const char *fmt) bb_perror_msg_and_die(fmt, device_name); } - -/* The width of the screen, for output wrapping. */ -static int max_col; - -/* Current position, to know when to wrap. */ -static int current_col; +static ATTRIBUTE_ALWAYS_INLINE int streq(const char *a, const char *b) +{ + return strcmp(a, b) == 0; +} /* Print format string MESSAGE and optional args. Wrap to next line first if it won't fit. - Print a space first unless MESSAGE will start a new line. */ + Print a space first unless MESSAGE will start a new line */ static void wrapf(const char *message, ...) { va_list args; - char buf[1024]; /* Plenty long for our needs. */ + char buf[1024]; /* Plenty long for our needs */ int buflen; va_start(args, message); @@ -449,7 +445,7 @@ static const struct mode_info *find_mode(const char *name) { int i; for (i = 0; i < NUM_mode_info; ++i) - if (STREQ(name, mode_info[i].name)) + if (streq(name, mode_info[i].name)) return &mode_info[i]; return 0; } @@ -458,7 +454,7 @@ static const struct control_info *find_control(const char *name) { int i; for (i = 0; i < NUM_control_info; ++i) - if (STREQ(name, control_info[i].name)) + if (streq(name, control_info[i].name)) return &control_info[i]; return 0; } @@ -477,17 +473,17 @@ enum { static int find_param(const char *name) { #ifdef HAVE_C_LINE - if (STREQ(name, "line")) return param_line; + if (streq(name, "line")) return param_line; #endif #ifdef TIOCGWINSZ - if (STREQ(name, "rows")) return param_rows; - if (STREQ(name, "cols")) return param_cols; - if (STREQ(name, "columns")) return param_cols; - if (STREQ(name, "size")) return param_size; -#endif - if (STREQ(name, "ispeed")) return param_ispeed; - if (STREQ(name, "ospeed")) return param_ospeed; - if (STREQ(name, "speed")) return param_speed; + if (streq(name, "rows")) return param_rows; + if (streq(name, "cols")) return param_cols; + if (streq(name, "columns")) return param_cols; + if (streq(name, "size")) return param_size; +#endif + if (streq(name, "ispeed")) return param_ispeed; + if (streq(name, "ospeed")) return param_ospeed; + if (streq(name, "speed")) return param_speed; return 0; } @@ -495,7 +491,7 @@ static int find_param(const char *name) int stty_main(int argc, char **argv) { struct termios mode; - void (*output_func)(struct termios *); + void (*output_func)(const struct termios *); const char *file_name = NULL; int require_set_attr; int speed_was_set; @@ -634,7 +630,7 @@ end_option: } /* Initialize to all zeroes so there is no risk memcmp will report a - spurious difference in an uninitialized portion of the structure. */ + spurious difference in an uninitialized portion of the structure */ memset(&mode, 0, sizeof(mode)); if (tcgetattr(STDIN_FILENO, &mode)) perror_on_device("%s"); @@ -739,10 +735,10 @@ end_option: can report `success' when it has actually failed to perform some proper subset of the requested operations. To detect this partial failure, get the current terminal attributes and - compare them to the requested ones. */ + compare them to the requested ones */ /* Initialize to all zeroes so there is no risk memcmp will report a - spurious difference in an uninitialized portion of the structure. */ + 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"); @@ -756,7 +752,7 @@ end_option: Sun users a little confusion, don't report an error if this happens. But suppress the error only if we haven't tried to set the baud rate explicitly -- otherwise we'd never give an - error for a true failure to set the baud rate. */ + error for a true failure to set the baud rate */ new_mode.c_cflag &= (~CIBAUD); if (speed_was_set || memcmp(&mode, &new_mode, sizeof(mode)) != 0) @@ -768,7 +764,6 @@ end_option: return EXIT_SUCCESS; } -/* Return 0 if not applied because not reversible; otherwise return 1. */ static void set_mode(const struct mode_info *info, int reversed, struct termios *mode) @@ -778,7 +773,7 @@ set_mode(const struct mode_info *info, int reversed, struct termios *mode) bitsp = mode_type_flag(EMT(info->type), mode); if (bitsp == NULL) { - /* Combination mode. */ + /* Combination mode */ if (info->name == evenp || info->name == parity) { if (reversed) mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8; @@ -843,7 +838,7 @@ set_mode(const struct mode_info *info, int reversed, struct termios *mode) } else if (info->name == raw || info->name == cooked) { if ((info->name[0] == 'r' && reversed) || (info->name[0] == 'c' && !reversed)) { - /* Cooked mode. */ + /* Cooked mode */ mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON; mode->c_oflag |= OPOST; mode->c_lflag |= ISIG | ICANON; @@ -854,7 +849,7 @@ set_mode(const struct mode_info *info, int reversed, struct termios *mode) mode->c_cc[VEOL] = CEOL; #endif } else { - /* Raw mode. */ + /* Raw mode */ mode->c_iflag = 0; mode->c_oflag &= ~OPOST; mode->c_lflag &= ~(ISIG | ICANON @@ -945,13 +940,13 @@ set_control_char(const struct control_info *info, const char *arg, value = bb_xparse_number(arg, stty_suffixes); else if (arg[0] == '\0' || arg[1] == '\0') value = arg[0]; - else if (STREQ(arg, "^-") || STREQ(arg, "undef")) + 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] == '^' && arg[1] != '\0') { /* Ignore any trailing junk */ if (arg[1] == '?') value = 127; else - value = arg[1] & ~0140; /* Non-letters get weird results. */ + value = arg[1] & ~0140; /* Non-letters get weird results */ } else value = bb_xparse_number(arg, stty_suffixes); mode->c_cc[info->offset] = value; @@ -976,9 +971,7 @@ set_speed(enum speed_setting type, const char *arg, struct termios *mode) static int get_win_size(int fd, struct winsize *win) { - int err = ioctl(fd, TIOCGWINSZ, (char *) win); - - return err; + return ioctl(fd, TIOCGWINSZ, (char *) win); } static void @@ -1002,7 +995,7 @@ set_window_size(int rows, int cols) 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. */ + At any rate, the problem is gone in Solaris 2.x */ if (win.ws_row == 0 || win.ws_col == 0) { struct ttysize ttysz; @@ -1055,7 +1048,7 @@ static int screen_columns(void) 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. */ + In case of any failure, just use the default */ if (get_win_size(STDOUT_FILENO, &win) == 0 && win.ws_col > 0) return win.ws_col; #endif @@ -1067,7 +1060,7 @@ static int screen_columns(void) return columns; } -static tcflag_t *mode_type_flag(enum mode_type type, struct termios *mode) +static tcflag_t *mode_type_flag(enum mode_type type, const struct termios *mode) { static const unsigned char tcflag_offsets[] = { offsetof(struct termios, c_cflag), /* control */ @@ -1082,7 +1075,7 @@ static tcflag_t *mode_type_flag(enum mode_type type, struct termios *mode) return NULL; } -static void display_changed(struct termios *mode) +static void display_changed(const struct termios *mode) { int i; int empty_line; @@ -1101,12 +1094,12 @@ static void display_changed(struct termios *mode) for (i = 0; control_info[i].name != stty_min; ++i) { if (mode->c_cc[control_info[i].offset] == control_info[i].saneval) continue; - /* If swtch is the same as susp, don't print both. */ + /* If swtch is the same as susp, don't print both */ #if VSWTCH == VSUSP if (control_info[i].name == stty_swtch) continue; #endif - /* If eof uses the same slot as min, only print whichever applies. */ + /* If eof uses the same slot as min, only print whichever applies */ #if VEOF == VMIN if ((mode->c_lflag & ICANON) == 0 && (control_info[i].name == stty_eof @@ -1144,9 +1137,7 @@ static void display_changed(struct termios *mode) wrapf("%s", mode_info[i].name); empty_line = 0; } - } - else if ((mode_info[i].flags & (SANE_SET | REV)) == - (SANE_SET | REV)) { + } else if ((mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV)) { wrapf("-%s", mode_info[i].name); empty_line = 0; } @@ -1157,7 +1148,7 @@ static void display_changed(struct termios *mode) } static void -display_all(struct termios *mode) +display_all(const struct termios *mode) { int i; tcflag_t *bitsp; @@ -1175,12 +1166,12 @@ display_all(struct termios *mode) current_col = 0; for (i = 0; control_info[i].name != stty_min; ++i) { - /* If swtch is the same as susp, don't print both. */ + /* If swtch is the same as susp, don't print both */ #if VSWTCH == VSUSP if (control_info[i].name == stty_swtch) continue; #endif - /* If eof uses the same slot as min, only print whichever applies. */ + /* If eof uses the same slot as min, only print whichever applies */ #if VEOF == VMIN if ((mode->c_lflag & ICANON) == 0 && (control_info[i].name == stty_eof @@ -1217,7 +1208,7 @@ display_all(struct termios *mode) current_col = 0; } -static void display_speed(struct termios *mode, int fancy) +static void display_speed(const struct termios *mode, int fancy) { unsigned long ispeed, ospeed; const char *fmt_str = @@ -1237,7 +1228,7 @@ static void display_speed(struct termios *mode, int fancy) current_col = 0; } -static void display_recoverable(struct termios *mode) +static void display_recoverable(const struct termios *mode) { int i; @@ -1256,7 +1247,7 @@ static int recover_mode(const char *arg, struct termios *mode) unsigned long iflag, oflag, cflag, lflag; /* Scan into temporaries since it is too much trouble to figure out - the right format for `tcflag_t'. */ + the right format for `tcflag_t' */ if (sscanf(arg, "%lx:%lx:%lx:%lx%n", &iflag, &oflag, &cflag, &lflag, &n) != 4) return 0; @@ -1272,7 +1263,7 @@ static int recover_mode(const char *arg, struct termios *mode) arg += n; } - /* Fail if there are too many fields. */ + /* Fail if there are too many fields */ if (*arg != '\0') return 0; @@ -1310,8 +1301,8 @@ static void sane_mode(struct termios *mode) } } -/* Return a string that is the printable representation of character CH. */ -/* Adapted from `cat' by Torbjorn Granlund. */ +/* Return a string that is the printable representation of character CH */ +/* Adapted from `cat' by Torbjorn Granlund */ static const char *visible(unsigned int ch) { |