/* stty -- change and print terminal line settings Copyright (C) 90, 91, 92, 93, 1994 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Usage: stty [-ag] [--all] [--save] [setting...] Options: -a, --all Write all current settings to stdout in human-readable form. -g, --save Write all current settings to stdout in stty-readable form. If no args are given, write to stdout the baud rate and settings that have been changed from their defaults. Mode reading and changes are done on stdin. David MacKenzie */ #ifdef HAVE_CONFIG_H #if defined (CONFIG_BROKETS) /* We use instead of "config.h" so that a compilation using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h (which it would do because it found this file in $srcdir). */ #include #else #include "config.h" #endif #endif #include #include #include #ifdef GWINSZ_IN_SYS_IOCTL #include #endif #ifdef WINSIZE_IN_PTEM #include #include #endif #include #ifdef __STDC__ #include #define VA_START(args, lastarg) va_start(args, lastarg) #else #include #define VA_START(args, lastarg) va_start(args) #endif #include "system.h" #include "long-options.h" #if defined(GWINSZ_BROKEN) /* Such as for SCO UNIX 3.2.2. */ #undef TIOCGWINSZ #endif #ifndef _POSIX_VDISABLE #define _POSIX_VDISABLE ((unsigned char) 0) #endif #define Control(c) ((c) & 0x1f) /* Canonical values for control characters. */ #ifndef CINTR #define CINTR Control ('c') #endif #ifndef CQUIT #define CQUIT 28 #endif #ifndef CERASE #define CERASE 127 #endif #ifndef CKILL #define CKILL Control ('u') #endif #ifndef CEOF #define CEOF Control ('d') #endif #ifndef CEOL #define CEOL _POSIX_VDISABLE #endif #ifndef CSTART #define CSTART Control ('q') #endif #ifndef CSTOP #define CSTOP Control ('s') #endif #ifndef CSUSP #define CSUSP Control ('z') #endif #if defined(VEOL2) && !defined(CEOL2) #define CEOL2 _POSIX_VDISABLE #endif #if defined(VSWTCH) && !defined(CSWTCH) #define CSWTCH _POSIX_VDISABLE #endif /* SunOS 5.3 loses (^Z doesn't work) if `swtch' is the same as `susp'. So the default is to disable `swtch.' */ #if defined (__sparc__) && defined (__svr4__) #undef CSWTCH #define CSWTCH _POSIX_VDISABLE #endif #if defined(VDSUSP) && !defined (CDSUSP) #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') #endif #if defined(VWERASE) && !defined(CWERASE) #define CWERASE Control ('w') #endif #if defined(VLNEXT) && !defined(CLNEXT) #define CLNEXT Control ('v') #endif #if defined(VDISCARD) && !defined(VFLUSHO) #define VFLUSHO VDISCARD #endif #if defined(VFLUSHO) && !defined(CFLUSHO) #define CFLUSHO Control ('o') #endif #if defined(VSTATUS) && !defined(CSTATUS) #define CSTATUS Control ('t') #endif static char *visible (); static unsigned long baud_to_value (); static int recover_mode (); static int screen_columns (); static int set_mode (); static long integer_arg (); static speed_t string_to_baud (); static tcflag_t *mode_type_flag (); static void display_all (); static void display_changed (); static void display_recoverable (); static void display_settings (); static void display_speed (); static void display_window_size (); static void sane_mode (); static void set_control_char (); static void set_speed (); static void set_window_size (); void error (); /* Which speeds to set. */ enum speed_setting { input_speed, output_speed, both_speeds }; /* What to output and how. */ enum output_type { changed, all, recoverable /* Default, -a, -g. */ }; /* Which member(s) of `struct termios' a mode uses. */ enum mode_type { control, input, output, local, combination }; /* 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. */ struct mode_info { char *name; /* Name given on command line. */ enum mode_type type; /* Which structure element to change. */ char flags; /* Setting and display options. */ unsigned long bits; /* Bits to set for this mode. */ unsigned long mask; /* Other bits to turn off for this mode. */ }; static struct mode_info mode_info[] = { {"parenb", control, REV, PARENB, 0}, {"parodd", control, REV, PARODD, 0}, {"cs5", control, 0, CS5, CSIZE}, {"cs6", control, 0, CS6, CSIZE}, {"cs7", control, 0, CS7, CSIZE}, {"cs8", control, 0, CS8, CSIZE}, {"hupcl", control, REV, HUPCL, 0}, {"hup", control, REV | OMIT, HUPCL, 0}, {"cstopb", control, REV, CSTOPB, 0}, {"cread", control, SANE_SET | REV, CREAD, 0}, {"clocal", control, REV, CLOCAL, 0}, #ifdef CRTSCTS {"crtscts", control, REV, CRTSCTS, 0}, #endif {"ignbrk", input, SANE_UNSET | REV, IGNBRK, 0}, {"brkint", input, SANE_SET | REV, BRKINT, 0}, {"ignpar", input, REV, IGNPAR, 0}, {"parmrk", input, REV, PARMRK, 0}, {"inpck", input, REV, INPCK, 0}, {"istrip", input, REV, ISTRIP, 0}, {"inlcr", input, SANE_UNSET | REV, INLCR, 0}, {"igncr", input, SANE_UNSET | REV, IGNCR, 0}, {"icrnl", input, SANE_SET | REV, ICRNL, 0}, {"ixon", input, REV, IXON, 0}, {"ixoff", input, SANE_UNSET | REV, IXOFF, 0}, {"tandem", input, REV | OMIT, IXOFF, 0}, #ifdef IUCLC {"iuclc", input, SANE_UNSET | REV, IUCLC, 0}, #endif #ifdef IXANY {"ixany", input, SANE_UNSET | REV, IXANY, 0}, #endif #ifdef IMAXBEL {"imaxbel", input, SANE_SET | REV, IMAXBEL, 0}, #endif {"opost", output, SANE_SET | REV, OPOST, 0}, #ifdef OLCUC {"olcuc", output, SANE_UNSET | REV, OLCUC, 0}, #endif #ifdef OCRNL {"ocrnl", output, SANE_UNSET | REV, OCRNL, 0}, #endif #ifdef ONLCR {"onlcr", output, SANE_SET | REV, ONLCR, 0}, #endif #ifdef ONOCR {"onocr", output, SANE_UNSET | REV, ONOCR, 0}, #endif #ifdef ONLRET {"onlret", output, SANE_UNSET | REV, ONLRET, 0}, #endif #ifdef OFILL {"ofill", output, SANE_UNSET | REV, OFILL, 0}, #endif #ifdef OFDEL {"ofdel", output, SANE_UNSET | REV, OFDEL, 0}, #endif #ifdef NLDLY {"nl1", output, SANE_UNSET, NL1, NLDLY}, {"nl0", output, SANE_SET, NL0, NLDLY}, #endif #ifdef CRDLY {"cr3", output, SANE_UNSET, CR3, CRDLY}, {"cr2", output, SANE_UNSET, CR2, CRDLY}, {"cr1", output, SANE_UNSET, CR1, CRDLY}, {"cr0", output, SANE_SET, CR0, CRDLY}, #endif #ifdef TABDLY {"tab3", output, SANE_UNSET, TAB3, TABDLY}, {"tab2", output, SANE_UNSET, TAB2, TABDLY}, {"tab1", output, SANE_UNSET, TAB1, TABDLY}, {"tab0", output, SANE_SET, TAB0, TABDLY}, #endif #ifdef BSDLY {"bs1", output, SANE_UNSET, BS1, BSDLY}, {"bs0", output, SANE_SET, BS0, BSDLY}, #endif #ifdef VTDLY {"vt1", output, SANE_UNSET, VT1, VTDLY}, {"vt0", output, SANE_SET, VT0, VTDLY}, #endif #ifdef FFDLY {"ff1", output, SANE_UNSET, FF1, FFDLY}, {"ff0", output, SANE_SET, FF0, FFDLY}, #endif {"isig", local, SANE_SET | REV, ISIG, 0}, {"icanon", local, SANE_SET | REV, ICANON, 0}, #ifdef IEXTEN {"iexten", local, SANE_SET | REV, IEXTEN, 0}, #endif {"echo", local, SANE_SET | REV, ECHO, 0}, {"echoe", local, SANE_SET | REV, ECHOE, 0}, {"crterase", local, REV | OMIT, ECHOE, 0}, {"echok", local, SANE_SET | REV, ECHOK, 0}, {"echonl", local, SANE_UNSET | REV, ECHONL, 0}, {"noflsh", local, SANE_UNSET | REV, NOFLSH, 0}, #ifdef XCASE {"xcase", local, SANE_UNSET | REV, XCASE, 0}, #endif #ifdef TOSTOP {"tostop", local, SANE_UNSET | REV, TOSTOP, 0}, #endif #ifdef ECHOPRT {"echoprt", local, SANE_UNSET | REV, ECHOPRT, 0}, {"prterase", local, REV | OMIT, ECHOPRT, 0}, #endif #ifdef ECHOCTL {"echoctl", local, SANE_SET | REV, ECHOCTL, 0}, {"ctlecho", local, REV | OMIT, ECHOCTL, 0}, #endif #ifdef ECHOKE {"echoke", local, SANE_SET | REV, ECHOKE, 0}, {"crtkill", local, REV | OMIT, ECHOKE, 0}, #endif {"evenp", combination, REV | OMIT, 0, 0}, {"parity", combination, REV | OMIT, 0, 0}, {"oddp", combination, REV | OMIT, 0, 0}, {"nl", combination, REV | OMIT, 0, 0}, {"ek", combination, OMIT, 0, 0}, {"sane", combination, OMIT, 0, 0}, {"cooked", combination, REV | OMIT, 0, 0}, {"raw", combination, REV | OMIT, 0, 0}, {"pass8", combination, REV | OMIT, 0, 0}, {"litout", combination, REV | OMIT, 0, 0}, {"cbreak", combination, REV | OMIT, 0, 0}, #ifdef IXANY {"decctlq", combination, REV | OMIT, 0, 0}, #endif #ifdef TABDLY {"tabs", combination, REV | OMIT, 0, 0}, #endif #if defined(XCASE) && defined(IUCLC) && defined(OLCUC) {"lcase", combination, REV | OMIT, 0, 0}, {"LCASE", combination, REV | OMIT, 0, 0}, #endif {"crt", combination, OMIT, 0, 0}, {"dec", combination, OMIT, 0, 0}, {NULL, control, 0, 0, 0} }; /* Control character settings. */ struct control_info { char *name; /* Name given on command line. */ unsigned char saneval; /* Value to set for `stty sane'. */ int offset; /* Offset in c_cc. */ }; /* Control characters. */ static struct control_info control_info[] = { {"intr", CINTR, VINTR}, {"quit", CQUIT, VQUIT}, {"erase", CERASE, VERASE}, {"kill", CKILL, VKILL}, {"eof", CEOF, VEOF}, {"eol", CEOL, VEOL}, #ifdef VEOL2 {"eol2", CEOL2, VEOL2}, #endif #ifdef VSWTCH {"swtch", CSWTCH, VSWTCH}, #endif {"start", CSTART, VSTART}, {"stop", CSTOP, VSTOP}, {"susp", CSUSP, VSUSP}, #ifdef VDSUSP {"dsusp", CDSUSP, VDSUSP}, #endif #ifdef VREPRINT {"rprnt", CRPRNT, VREPRINT}, #endif #ifdef VWERASE {"werase", CWERASE, VWERASE}, #endif #ifdef VLNEXT {"lnext", CLNEXT, VLNEXT}, #endif #ifdef VFLUSHO {"flush", CFLUSHO, VFLUSHO}, #endif #ifdef VSTATUS {"status", CSTATUS, VSTATUS}, #endif /* These must be last because of the display routines. */ {"min", 1, VMIN}, {"time", 0, VTIME}, {NULL, 0, 0} }; /* The width of the screen, for output wrapping. */ static int max_col; /* Current position, to know when to wrap. */ static int current_col; static struct option longopts[] = { {"all", no_argument, NULL, 'a'}, {"save", no_argument, NULL, 'g'}, {NULL, 0, NULL, 0} }; /* The name this program was run with. */ char *program_name; /* 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. */ /* VARARGS */ static void #ifdef __STDC__ wrapf (char *message, ...) #else wrapf (message, va_alist) char *message; va_dcl #endif { va_list args; char buf[1024]; /* Plenty long for our needs. */ int buflen; VA_START (args, message); vsprintf (buf, message, args); va_end (args); buflen = strlen (buf); if (current_col + (current_col > 0) + buflen >= max_col) { putchar ('\n'); current_col = 0; } if (current_col > 0) { putchar (' '); current_col++; } fputs (buf, stdout); current_col += buflen; } static void usage (status) int status; { if (status != 0) fprintf (stderr, "Try `%s --help' for more information.\n", program_name); else { printf ("\ Usage: %s [SETTING]...\n\ or: %s OPTION\n\ ", program_name, program_name); printf ("\ \n\ -a, --all print all current settings in human-readable form\n\ -g, --save print all current settings in a stty-readable form\n\ --help display this help and exit\n\ --version output version information and exit\n\ \n\ Optional - before SETTING indicates negation. An * marks non-POSIX\n\ settings. The underlying system defines which settings are available.\n\ "); printf ("\ \n\ Special characters:\n\ * dsusp CHAR CHAR will send a terminal stop signal once input flushed\n\ eof CHAR CHAR will send an end of file (terminate the input)\n\ eol CHAR CHAR will end the line\n\ * eol2 CHAR alternate CHAR for ending the line\n\ erase CHAR CHAR will erase the last character typed\n\ intr CHAR CHAR will send an interrupt signal\n\ kill CHAR CHAR will erase the current line\n\ * lnext CHAR CHAR will enter the next character quoted\n\ quit CHAR CHAR will send a quit signal\n\ * rprnt CHAR CHAR will redraw the current line\n\ start CHAR CHAR will restart the output after stopping it\n\ stop CHAR CHAR will stop the output\n\ susp CHAR CHAR will send a terminal stop signal\n\ * swtch CHAR CHAR will switch to a different shell layer\n\ * werase CHAR CHAR will erase the last word typed\n\ "); printf ("\ \n\ Special settings:\n\ N set the input and output speeds to N bauds\n\ * cols N tell the kernel that the terminal has N columns\n\ * columns N same as cols N\n\ ispeed N set the input speed to N\n\ * line N use line discipline N\n\ min N with -icanon, set N characters minimum for a completed read\n\ ospeed N set the output speed to N\n\ * rows N tell the kernel that the terminal has N rows\n\ * size print the number of rows and columns according to the kernel\n\ speed print the terminal speed\n\ time N with -icanon, set read timeout of N tenths of a second\n\ "); printf ("\ \n\ Control settings:\n\ [-]clocal disable modem control signals\n\ [-]cread allow input to be received\n\ * [-]crtscts enable RTS/CTS handshaking\n\ csN set character size to N bits, N in [5..8]\n\ [-]cstopb use two stop bits per character (one with `-')\n\ [-]hup send a hangup signal when the last process closes the tty\n\ [-]hupcl same as [-]hup\n\ [-]parenb generate parity bit in output and expect parity bit in input\n\ [-]parodd set odd parity (even with `-')\n\ "); printf ("\ \n\ Input settings:\n\ [-]brkint breaks cause an interrupt signal\n\ [-]icrnl translate carriage return to newline\n\ [-]ignbrk ignore breaks\n\ [-]igncr ignore carriage return\n\ [-]ignpar ignore parity errors\n\ * [-]imaxbel beep and do not flush a full input buffer on a character\n\ [-]inlcr translate newline to carriage return\n\ [-]inpck enable input parity checking\n\ [-]istrip clear high (8th) bit of input characters\n\ * [-]iuclc translate uppercase characters to lowercase\n\ * [-]ixany let any character restart output, not only start character\n\ [-]ixoff enable sending of start/stop characters\n\ [-]ixon enable XON/XOFF flow control\n\ [-]parmrk mark parity errors (with a 255-0-character sequence)\n\ [-]tandem same as [-]ixoff\n\ "); printf ("\ \n\ Output settings:\n\ * bsN backspace delay style, N in [0..1]\n\ * crN carriage return delay style, N in [0..3]\n\ * ffN form feed delay style, N in [0..1]\n\ * nlN newline delay style, N in [0..1]\n\ * [-]ocrnl translate carriage return to newline\n\ * [-]ofdel use delete characters for fill instead of null characters\n\ * [-]ofill use fill (padding) characters instead of timing for delays\n\ * [-]olcuc translate lowercase characters to uppercase\n\ * [-]onlcr translate newline to carriage return-newline\n\ * [-]onlret newline performs a carriage return\n\ * [-]onocr do not print carriage returns in the first column\n\ [-]opost postprocess output\n\ * tabN horizontal tab delay style, N in [0..3]\n\ * tabs same as tab0\n\ * -tabs same as tab3\n\ * vtN vertical tab delay style, N in [0..1]\n\ "); printf ("\ \n\ Local settings:\n\ [-]crterase echo erase characters as backspace-space-backspace\n\ * crtkill kill all line by obeying the echoprt and echoe settings\n\ * -crtkill kill all line by obeying the echoctl and echok settings\n\ * [-]ctlecho echo control characters in hat notation (`^c')\n\ [-]echo echo input characters\n\ * [-]echoctl same as [-]ctlecho\n\ [-]echoe same as [-]crterase\n\ [-]echok echo a newline after a kill character\n\ * [-]echoke same as [-]crtkill\n\ [-]echonl echo newline even if not echoing other characters\n\ * [-]echoprt echo erased characters backward, between `\\' and '/'\n\ [-]icanon enable erase, kill, werase, and rprnt special characters\n\ [-]iexten enable non-POSIX special characters\n\ [-]isig enable interrupt, quit, and suspend special characters\n\ [-]noflsh disable flushing after interrupt and quit special characters\n\ * [-]prterase same as [-]echoprt\n\ * [-]tostop stop background jobs that try to write to the terminal\n\ * [-]xcase with icanon, escape with `\\' for uppercase characters\n\ "); printf ("\ \n\ Combination settings:\n\ * [-]LCASE same as [-]lcase\n\ cbreak same as -icanon\n\ -cbreak same as icanon\n\ cooked same as brkint ignpar istrip icrnl ixon opost isig\n\ icanon, eof and eol characters to their default values\n\ -cooked same as raw\n\ crt same as echoe echoctl echoke\n\ dec same as echoe echoctl echoke -ixany intr ^c erase 0177\n\ kill ^u\n\ * [-]decctlq same as [-]ixany\n\ ek erase and kill characters to their default values\n\ evenp same as parenb -parodd cs7\n\ -evenp same as -parenb cs8\n\ * [-]lcase same as xcase iuclc olcuc\n\ litout same as -parenb -istrip -opost cs8\n\ -litout same as parenb istrip opost cs7\n\ nl same as -icrnl -onlcr\n\ -nl same as icrnl -inlcr -igncr onlcr -ocrnl -onlret\n\ oddp same as parenb parodd cs7\n\ -oddp same as -parenb cs8\n\ [-]parity same as [-]evenp\n\ pass8 same as -parenb -istrip cs8\n\ -pass8 same as parenb istrip cs7\n\ raw same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip\n\ -inlcr -igncr -icrnl -ixon -ixoff -iuclc -ixany\n\ -imaxbel -opost -isig -icanon -xcase min 1 time 0\n\ -raw same as cooked\n\ sane same as cread -ignbrk brkint -inlcr -igncr icrnl\n\ -ixoff -iucl -ixany imaxbel opost -olcuc -ocrnl onlcr\n\ -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0\n\ isig icanon iexten echo echoe echok -echonl -noflsh\n\ -xcase -tostop -echoprt echoctl echoke, all special\n\ characters to their default values.\n\ "); printf ("\ \n\ Handle the tty line connected to standard input. Without arguments,\n\ prints baud rate, line discipline, and deviations from stty sane. In\n\ settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or\n\ 127; special values ^- or undef used to disable special characters.\n\ "); } exit (status); } void main (argc, argv) int argc; char **argv; { struct termios mode; enum output_type output_type; int optc; int require_set_attr; int speed_was_set; int verbose_output; int recoverable_output; int k; program_name = argv[0]; parse_long_options (argc, argv, "stty", usage); output_type = changed; verbose_output = 0; recoverable_output = 0; /* Recognize the long options only. */ opterr = 0; while ((optc = getopt_long_only (argc, argv, "ag", longopts, (int *) 0)) != EOF) { switch (optc) { case 'a': verbose_output = 1; output_type = all; break; case 'g': recoverable_output = 1; output_type = recoverable; break; default: break; } } /* Recognize short options and combinations: -a, -g, -ag, and -ga. They need not precede non-options. We cannot use GNU getopt because it would treat -tabs and -ixany as uses of the -a option. */ for (k = optind; k < argc; k++) { if (argv[k][0] == '-') { if (argv[k][1] == 'a' && argv[k][2] == '\0') { ++optind; verbose_output = 1; } else if (argv[k][1] == 'g' && argv[k][2] == '\0') { ++optind; recoverable_output = 1; } else if ((argv[k][1] == 'g' && argv[k][2] == 'a' && argv[k][3] == '\0') || (argv[k][1] == 'a' && argv[k][2] == 'g' && argv[k][3] == '\0')) { ++optind; verbose_output = 1; recoverable_output = 1; } } } /* Specifying both -a and -g gets an error. */ if (verbose_output && recoverable_output) error (2, 0, "the options for verbose and stty-readable output styles are\n\ \tmutually exclusive"); /* Specifying any other arguments with -a or -g gets an error. */ if (argc - optind > 0 && (verbose_output || recoverable_output)) error (2, 0, "when specifying an output style, modes may not be set"); /* Initialize to all zeroes so there is no risk memcmp will report a spurious difference in an uninitialized portion of the structure. */ bzero (&mode, sizeof (mode)); if (tcgetattr (0, &mode)) error (1, errno, "standard input"); if (verbose_output || recoverable_output || argc == 1) { max_col = screen_columns (); current_col = 0; display_settings (output_type, &mode); exit (0); } speed_was_set = 0; require_set_attr = 0; k = 1; while (k < argc) { int match_found = 0; int reversed = 0; int i; if (argv[k][0] == '-') { ++argv[k]; reversed = 1; } for (i = 0; mode_info[i].name != NULL; ++i) { if (!strcmp (argv[k], mode_info[i].name)) { match_found = set_mode (&mode_info[i], reversed, &mode); require_set_attr = 1; break; } } if (match_found == 0 && reversed) { error (0, 0, "invalid argument `%s'", --argv[k]); usage (1); } if (match_found == 0) { for (i = 0; control_info[i].name != NULL; ++i) { if (!strcmp (argv[k], control_info[i].name)) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } match_found = 1; ++k; set_control_char (&control_info[i], argv[k], &mode); require_set_attr = 1; break; } } } if (match_found == 0) { if (!strcmp (argv[k], "ispeed")) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } ++k; set_speed (input_speed, argv[k], &mode); speed_was_set = 1; require_set_attr = 1; } else if (!strcmp (argv[k], "ospeed")) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } ++k; set_speed (output_speed, argv[k], &mode); speed_was_set = 1; require_set_attr = 1; } #ifdef TIOCGWINSZ else if (!strcmp (argv[k], "rows")) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } ++k; set_window_size ((int) integer_arg (argv[k]), -1); } else if (!strcmp (argv[k], "cols") || !strcmp (argv[k], "columns")) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } ++k; set_window_size (-1, (int) integer_arg (argv[k])); } else if (!strcmp (argv[k], "size")) display_window_size (0); #endif #ifdef HAVE_C_LINE else if (!strcmp (argv[k], "line")) { if (k == argc - 1) { error (0, 0, "missing argument to `%s'", argv[k]); usage (1); } ++k; mode.c_line = integer_arg (argv[k]); require_set_attr = 1; } #endif else if (!strcmp (argv[k], "speed")) display_speed (&mode, 0); else if (string_to_baud (argv[k]) != (speed_t) -1) { set_speed (both_speeds, argv[k], &mode); speed_was_set = 1; require_set_attr = 1; } else { if (recover_mode (argv[k], &mode) == 0) { error (0, 0, "invalid argument `%s'", argv[k]); usage (1); } require_set_attr = 1; } } k++; } if (require_set_attr) { struct termios new_mode; if (tcsetattr (0, TCSADRAIN, &mode)) error (1, errno, "standard input"); /* POSIX (according to Zlotnick's book) tcsetattr returns zero if it performs *any* of the requested operations. This means it 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. */ /* Initialize to all zeroes so there is no risk memcmp will report a spurious difference in an uninitialized portion of the structure. */ bzero (&new_mode, sizeof (new_mode)); if (tcgetattr (0, &new_mode)) error (1, errno, "standard input"); /* Normally, one shouldn't use memcmp to compare structures that may have `holes' containing uninitialized data, but we have been careful to initialize the storage of these two variables to all zeroes. One might think it more efficient simply to compare the modified fields, but that would require enumerating those fields -- and not all systems have the same fields in this structure. */ if (memcmp (&mode, &new_mode, sizeof (mode)) != 0) { #ifdef CIBAUD /* SunOS 4.1.3 (at least) has the problem that after this sequence, tcgetattr(&m1); tcsetattr(&m1); tcgetattr(&m2); sometimes (m1 != m2). The only difference is in the four bits of the c_cflag field corresponding to the baud rate. To save 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. */ new_mode.c_cflag &= (~CIBAUD); if (speed_was_set || memcmp (&mode, &new_mode, sizeof (mode)) != 0) #endif error (1, 0, "standard input: unable to perform all requested operations"); } } exit (0); } /* Return 0 if not applied because not reversible; otherwise return 1. */ static int set_mode (info, reversed, mode) struct mode_info *info; int reversed; struct termios *mode; { tcflag_t *bitsp; if (reversed && (info->flags & REV) == 0) return 0; bitsp = mode_type_flag (info->type, mode); if (bitsp == NULL) { /* Combination mode. */ if (!strcmp (info->name, "evenp") || !strcmp (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 (!strcmp (info->name, "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 (!strcmp (info->name, "nl")) { if (reversed) { mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR; mode->c_oflag = (mode->c_oflag #ifdef ONLCR | ONLCR #endif ) #ifdef OCRNL & ~OCRNL #endif #ifdef ONLRET & ~ONLRET #endif ; } else { mode->c_iflag = mode->c_iflag & ~ICRNL; #ifdef ONLCR mode->c_oflag = mode->c_oflag & ~ONLCR; #endif } } else if (!strcmp (info->name, "ek")) { mode->c_cc[VERASE] = CERASE; mode->c_cc[VKILL] = CKILL; } else if (!strcmp (info->name, "sane")) sane_mode (mode); else if (!strcmp (info->name, "cbreak")) { if (reversed) mode->c_lflag |= ICANON; else mode->c_lflag &= ~ICANON; } else if (!strcmp (info->name, "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 (!strcmp (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 (!strcmp (info->name, "raw") || !strcmp (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 #ifdef XCASE | XCASE #endif ); mode->c_cc[VMIN] = 1; mode->c_cc[VTIME] = 0; } } #ifdef IXANY else if (!strcmp (info->name, "decctlq")) { if (reversed) mode->c_iflag |= IXANY; else mode->c_iflag &= ~IXANY; } #endif #ifdef TABDLY else if (!strcmp (info->name, "tabs")) { if (reversed) mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3; else mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0; } #endif #if defined(XCASE) && defined(IUCLC) && defined(OLCUC) else if (!strcmp (info->name, "lcase") || !strcmp (info->name, "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; } } #endif else if (!strcmp (info->name, "crt")) mode->c_lflag |= ECHOE #ifdef ECHOCTL | ECHOCTL #endif #ifdef ECHOKE | ECHOKE #endif ; else if (!strcmp (info->name, "dec")) { mode->c_cc[VINTR] = 3; /* ^C */ mode->c_cc[VERASE] = 127; /* DEL */ mode->c_cc[VKILL] = 21; /* ^U */ mode->c_lflag |= ECHOE #ifdef ECHOCTL | ECHOCTL #endif #ifdef ECHOKE | ECHOKE #endif ; #ifdef IXANY mode->c_iflag &= ~IXANY; #endif } } else if (reversed) *bitsp = *bitsp & ~info->mask & ~info->bits; else *bitsp = (*bitsp & ~info->mask) | info->bits; return 1; } static void set_control_char (info, arg, mode) struct control_info *info; char *arg; struct termios *mode; { unsigned char value; if (!strcmp (info->name, "min") || !strcmp (info->name, "time")) value = integer_arg (arg); else if (arg[0] == '\0' || arg[1] == '\0') value = arg[0]; else if (!strcmp (arg, "^-") || !strcmp (arg, "undef")) value = _POSIX_VDISABLE; 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. */ } else value = integer_arg (arg); mode->c_cc[info->offset] = value; } static void set_speed (type, arg, mode) enum speed_setting type; char *arg; struct termios *mode; { speed_t baud; baud = string_to_baud (arg); if (type == input_speed || type == both_speeds) cfsetispeed (mode, baud); if (type == output_speed || type == both_speeds) cfsetospeed (mode, baud); } #ifdef TIOCGWINSZ /* Get window size information. First try getting the information associated with standard output and if that fails, try standard input. Return zero for success, non-zero if both ioctl's failed. */ static int get_win_size (win) struct winsize *win; { int err; err = ioctl (1, TIOCGWINSZ, (char *) win); if (err != 0) err = ioctl (0, TIOCGWINSZ, (char *) win); return err; } static void set_window_size (rows, cols) int rows, cols; { struct winsize win; if (get_win_size (&win)) { if (errno != EINVAL) error (1, errno, "standard input"); bzero (&win, sizeof (win)); } if (rows >= 0) win.ws_row = rows; if (cols >= 0) win.ws_col = cols; #ifdef TIOCSSIZE /* Alexander Dupuy 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. Unfortunately, the old TIOCSSIZE code does collide with TIOCSWINSZ, but they can be disambiguated by checking whether a "struct ttysize" structure's "ts_lines" field is greater than 64K or not. If so, it's almost certainly a "struct winsize" instead. At any rate, the bug manifests itself when ws_row == 0; the symptom is that ws_row is set to ws_col, and ws_col is set to (ws_xpixel<<16) + ws_ypixel. Since GNU stty sets rows and columns separately, this bug caused "stty rows 0 cols 0" to set rows to cols and cols to 0, while "stty cols 0 rows 0" would do the right thing. On a little-endian machine like the sun386i, the problem is the same, but for ws_col == 0. The workaround is to do the ioctl once with row and col = 1 to set the pixel info, and then do it again using a TIOCSSIZE to set rows/cols. */ 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 = 1; win.ws_col = 1; if (ioctl (0, TIOCSWINSZ, (char *) &win)) error (1, errno, "standard input"); if (ioctl (0, TIOCSSIZE, (char *) &ttysz)) error (1, errno, "standard input"); return; } #endif if (ioctl (0, TIOCSWINSZ, (char *) &win)) error (1, errno, "standard input"); } static void display_window_size (fancy) int fancy; { struct winsize win; if (get_win_size (&win)) { if (errno != EINVAL) error (1, errno, "standard input"); } else { wrapf (fancy ? "rows %d; columns %d;" : "%d %d\n", win.ws_row, win.ws_col); if (!fancy) current_col = 0; } } #endif static int screen_columns () { #ifdef TIOCGWINSZ struct winsize win; if (get_win_size (&win)) { /* With Solaris 2.[123], this ioctl fails and errno is set to EINVAL for telnet (but not rlogin) sessions. */ if (errno != EINVAL) error (1, errno, "standard input"); } else if (win.ws_col > 0) return win.ws_col; #endif if (getenv ("COLUMNS")) return atoi (getenv ("COLUMNS")); return 80; } static tcflag_t * mode_type_flag (type, mode) enum mode_type type; struct termios *mode; { switch (type) { case control: return &mode->c_cflag; case input: return &mode->c_iflag; case output: return &mode->c_oflag; case local: return &mode->c_lflag; case combination: return NULL; default: abort (); } } static void display_settings (output_type, mode) enum output_type output_type; struct termios *mode; { switch (output_type) { case changed: display_changed (mode); break; case all: display_all (mode); break; case recoverable: display_recoverable (mode); break; } } static void display_changed (mode) struct termios *mode; { int i; int empty_line; tcflag_t *bitsp; unsigned long mask; enum mode_type prev_type = control; display_speed (mode, 1); #ifdef HAVE_C_LINE wrapf ("line = %d;", mode->c_line); #endif putchar ('\n'); current_col = 0; empty_line = 1; for (i = 0; strcmp (control_info[i].name, "min"); ++i) { if (mode->c_cc[control_info[i].offset] == control_info[i].saneval) continue; empty_line = 0; wrapf ("%s = %s;", control_info[i].name, visible (mode->c_cc[control_info[i].offset])); } if ((mode->c_lflag & ICANON) == 0) { wrapf ("min = %d; time = %d;\n", (int) mode->c_cc[VMIN], (int) mode->c_cc[VTIME]); } else if (empty_line == 0) putchar ('\n'); current_col = 0; empty_line = 1; for (i = 0; mode_info[i].name != NULL; ++i) { if (mode_info[i].flags & OMIT) continue; if (mode_info[i].type != prev_type) { if (empty_line == 0) { putchar ('\n'); current_col = 0; empty_line = 1; } prev_type = mode_info[i].type; } 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) { wrapf ("%s", mode_info[i].name); empty_line = 0; } } else if ((mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV)) { wrapf ("-%s", mode_info[i].name); empty_line = 0; } } if (empty_line == 0) putchar ('\n'); current_col = 0; } static void display_all (mode) struct termios *mode; { int i; tcflag_t *bitsp; unsigned long mask; enum mode_type prev_type = control; display_speed (mode, 1); #ifdef TIOCGWINSZ display_window_size (1); #endif #ifdef HAVE_C_LINE wrapf ("line = %d;", mode->c_line); #endif putchar ('\n'); current_col = 0; for (i = 0; strcmp (control_info[i].name, "min"); ++i) { wrapf ("%s = %s;", control_info[i].name, visible (mode->c_cc[control_info[i].offset])); } wrapf ("min = %d; time = %d;\n", mode->c_cc[VMIN], mode->c_cc[VTIME]); current_col = 0; for (i = 0; mode_info[i].name != NULL; ++i) { if (mode_info[i].flags & OMIT) continue; if (mode_info[i].type != prev_type) { putchar ('\n'); current_col = 0; prev_type = mode_info[i].type; } 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); else if (mode_info[i].flags & REV) wrapf ("-%s", mode_info[i].name); } putchar ('\n'); current_col = 0; } static void display_speed (mode, fancy) struct termios *mode; int fancy; { if (cfgetispeed (mode) == 0 || cfgetispeed (mode) == cfgetospeed (mode)) wrapf (fancy ? "speed %lu baud;" : "%lu\n", baud_to_value (cfgetospeed (mode))); else wrapf (fancy ? "ispeed %lu baud; ospeed %lu baud;" : "%lu %lu\n", baud_to_value (cfgetispeed (mode)), baud_to_value (cfgetospeed (mode))); if (!fancy) current_col = 0; } static void display_recoverable (mode) 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); for (i = 0; i < NCCS; ++i) printf (":%x", (unsigned int) mode->c_cc[i]); putchar ('\n'); } static int recover_mode (arg, mode) char *arg; struct termios *mode; { int i, n; unsigned int chr; unsigned long iflag, oflag, cflag, lflag; /* Scan into temporaries since it is too much trouble to figure out the right format for `tcflag_t'. */ if (sscanf (arg, "%lx:%lx:%lx:%lx%n", &iflag, &oflag, &cflag, &lflag, &n) != 4) return 0; mode->c_iflag = iflag; mode->c_oflag = oflag; mode->c_cflag = cflag; mode->c_lflag = lflag; arg += n; for (i = 0; i < NCCS; ++i) { if (sscanf (arg, ":%x%n", &chr, &n) != 1) return 0; mode->c_cc[i] = chr; arg += n; } return 1; } struct speed_map { char *string; /* ASCII representation. */ speed_t speed; /* Internal form. */ unsigned long value; /* Numeric value. */ }; struct speed_map speeds[] = { {"0", B0, 0}, {"50", B50, 50}, {"75", B75, 75}, {"110", B110, 110}, {"134", B134, 134}, {"134.5", B134, 134}, {"150", B150, 150}, {"200", B200, 200}, {"300", B300, 300}, {"600", B600, 600}, {"1200", B1200, 1200}, {"1800", B1800, 1800}, {"2400", B2400, 2400}, {"4800", B4800, 4800}, {"9600", B9600, 9600}, {"19200", B19200, 19200}, {"38400", B38400, 38400}, {"exta", B19200, 19200}, {"extb", B38400, 38400}, #ifdef B57600 {"57600", B57600, 57600}, #endif #ifdef B115200 {"115200", B115200, 115200}, #endif {NULL, 0, 0} }; static speed_t string_to_baud (arg) char *arg; { int i; for (i = 0; speeds[i].string != NULL; ++i) if (!strcmp (arg, speeds[i].string)) return speeds[i].speed; return (speed_t) -1; } static unsigned long baud_to_value (speed) speed_t speed; { int i; for (i = 0; speeds[i].string != NULL; ++i) if (speed == speeds[i].speed) return speeds[i].value; return 0; } static void sane_mode (mode) struct termios *mode; { int i; tcflag_t *bitsp; for (i = 0; control_info[i].name; ++i) { #if VMIN == VEOF if (!strcmp (control_info[i].name, "min")) break; #endif mode->c_cc[control_info[i].offset] = control_info[i].saneval; } for (i = 0; mode_info[i].name != NULL; ++i) { if (mode_info[i].flags & SANE_SET) { bitsp = mode_type_flag (mode_info[i].type, mode); *bitsp = (*bitsp & ~mode_info[i].mask) | mode_info[i].bits; } else if (mode_info[i].flags & SANE_UNSET) { bitsp = mode_type_flag (mode_info[i].type, mode); *bitsp = *bitsp & ~mode_info[i].mask & ~mode_info[i].bits; } } } /* Return a string that is the printable representation of character CH. */ /* Adapted from `cat' by Torbjorn Granlund. */ static char * visible (ch) unsigned char ch; { static char buf[10]; char *bpout = buf; if (ch == _POSIX_VDISABLE) return ""; if (ch >= 32) { if (ch < 127) *bpout++ = ch; else if (ch == 127) { *bpout++ = '^'; *bpout++ = '?'; } else { *bpout++ = 'M', *bpout++ = '-'; if (ch >= 128 + 32) { if (ch < 128 + 127) *bpout++ = ch - 128; else { *bpout++ = '^'; *bpout++ = '?'; } } else { *bpout++ = '^'; *bpout++ = ch - 128 + 64; } } } else { *bpout++ = '^'; *bpout++ = ch + 64; } *bpout = '\0'; return buf; } /* Parse string S as an integer, using decimal radix by default, but allowing octal and hex numbers as in C. */ /* From `od' by Richard Stallman. */ static long integer_arg (s) char *s; { long value; int radix = 10; char *p = s; int c; if (*p != '0') radix = 10; else if (*++p == 'x') { radix = 16; p++; } else radix = 8; value = 0; while (((c = *p++) >= '0' && c <= '9') || (radix == 16 && (c & ~40) >= 'A' && (c & ~40) <= 'Z')) { value *= radix; if (c >= '0' && c <= '9') value += c - '0'; else value += (c & ~40) - 'A'; } if (c == 'b') value *= 512; else if (c == 'B') value *= 1024; else p--; if (*p) { error (0, 0, "invalid integer argument `%s'", s); usage (1); } return value; }