/* vi: set sw=4 ts=4: */ /* stty -- change and print terminal line settings Copyright (C) 1990-1999 Free Software Foundation, Inc. Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ /* Usage: stty [-ag] [-F device] [setting...] Options: -a Write all current settings to stdout in human-readable form. -g Write all current settings to stdout in stty-readable form. -F Open and use the specified device instead of stdin 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 the specified device, or stdin if none was specified. David MacKenzie Special for busybox ported by Vladimir Oleynik 2001 */ //#define TEST #include "busybox.h" #include #include #include #include #include #ifndef STDIN_FILENO # define STDIN_FILENO 0 #endif #ifndef STDOUT_FILENO # define STDOUT_FILENO 1 #endif #include #include #include #include #include #include #include #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. */ #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 /* ISC renamed swtch to susp for termios, but we'll accept either name. */ #if defined(VSUSP) && !defined(VSWTCH) # define VSWTCH VSUSP # define CSWTCH CSUSP #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(VWERSE) && !defined (VWERASE) /* AIX-3.2.5 */ # define VWERASE VWERSE #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(VFLUSH) && !defined(VFLUSHO) /* Ultrix 4.2 */ # define VFLUSHO VFLUSH #endif #if defined(CTLECH) && !defined(ECHOCTL) /* Ultrix 4.3 */ # define ECHOCTL CTLECH #endif #if defined(TCTLECH) && !defined(ECHOCTL) /* Ultrix 4.2 */ # define ECHOCTL TCTLECH #endif #if defined(CRTKIL) && !defined(ECHOKE) /* Ultrix 4.2 and 4.3 */ # define ECHOKE CRTKIL #endif #if defined(VFLUSHO) && !defined(CFLUSHO) # define CFLUSHO Control ('o') #endif #if defined(VSTATUS) && !defined(CSTATUS) # define CSTATUS Control ('t') #endif /* Which speeds to set. */ enum speed_setting { input_speed, output_speed, both_speeds }; /* 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. */ control, input, output, local, combination }; static const char evenp [] = "evenp"; static const char raw [] = "raw"; static const char stty_min [] = "min"; static const char stty_time [] = "time"; static const char stty_swtch[] = "swtch"; static const char stty_eol [] = "eol"; static const char stty_eof [] = "eof"; static const char parity [] = "parity"; static const char stty_oddp [] = "oddp"; static const char stty_nl [] = "nl"; static const char stty_ek [] = "ek"; static const char stty_sane [] = "sane"; static const char cbreak [] = "cbreak"; static const char stty_pass8[] = "pass8"; static const char litout [] = "litout"; static const char cooked [] = "cooked"; static const char decctlq [] = "decctlq"; static const char stty_tabs [] = "tabs"; static const char stty_lcase[] = "lcase"; 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. */ /* 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 MI_ENTRY(N,T,F,B,M) { N, T, F, M, B } static const struct mode_info mode_info[] = { MI_ENTRY("parenb", control, REV, PARENB, 0 ), MI_ENTRY("parodd", control, REV, PARODD, 0 ), MI_ENTRY("cs5", control, 0, CS5, CSIZE), MI_ENTRY("cs6", control, 0, CS6, CSIZE), MI_ENTRY("cs7", control, 0, CS7, CSIZE), MI_ENTRY("cs8", control, 0, CS8, CSIZE), MI_ENTRY("hupcl", control, REV, HUPCL, 0 ), MI_ENTRY("hup", control, REV | OMIT, HUPCL, 0 ), MI_ENTRY("cstopb", control, REV, CSTOPB, 0 ), MI_ENTRY("cread", control, SANE_SET | REV, CREAD, 0 ), MI_ENTRY("clocal", control, REV, CLOCAL, 0 ), #ifdef CRTSCTS MI_ENTRY("crtscts", control, REV, CRTSCTS, 0 ), #endif MI_ENTRY("ignbrk", input, SANE_UNSET | REV, IGNBRK, 0 ), MI_ENTRY("brkint", input, SANE_SET | REV, BRKINT, 0 ), MI_ENTRY("ignpar", input, REV, IGNPAR, 0 ), MI_ENTRY("parmrk", input, REV, PARMRK, 0 ), MI_ENTRY("inpck", input, REV, INPCK, 0 ), MI_ENTRY("istrip", input, REV, ISTRIP, 0 ), MI_ENTRY("inlcr", input, SANE_UNSET | REV, INLCR, 0 ), MI_ENTRY("igncr", input, SANE_UNSET | REV, IGNCR, 0 ), MI_ENTRY("icrnl", input, SANE_SET | REV, ICRNL, 0 ), MI_ENTRY("ixon", input, REV, IXON, 0 ), MI_ENTRY("ixoff", input, SANE_UNSET | REV, IXOFF, 0 ), MI_ENTRY("tandem", input, REV | OMIT, IXOFF, 0 ), #ifdef IUCLC MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 ), #endif #ifdef IXANY MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 ), #endif #ifdef IMAXBEL MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 ), #endif MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 ), #ifdef OLCUC MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 ), #endif #ifdef OCRNL MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 ), #endif #ifdef ONLCR MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 ), #endif #ifdef ONOCR MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 ), #endif #ifdef ONLRET MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 ), #endif #ifdef OFILL MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 ), #endif #ifdef OFDEL MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 ), #endif #ifdef NLDLY MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY), MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY), #endif #ifdef CRDLY MI_ENTRY("cr3", output, SANE_UNSET, CR3, CRDLY), MI_ENTRY("cr2", output, SANE_UNSET, CR2, CRDLY), MI_ENTRY("cr1", output, SANE_UNSET, CR1, CRDLY), MI_ENTRY("cr0", output, SANE_SET, CR0, CRDLY), #endif #ifdef TABDLY MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY), MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY), MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY), MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY), #else # ifdef OXTABS MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 ), # endif #endif #ifdef BSDLY MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY), MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY), #endif #ifdef VTDLY MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY), MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY), #endif #ifdef FFDLY MI_ENTRY("ff1", output, SANE_UNSET, FF1, FFDLY), MI_ENTRY("ff0", output, SANE_SET, FF0, FFDLY), #endif MI_ENTRY("isig", local, SANE_SET | REV, ISIG, 0 ), MI_ENTRY("icanon", local, SANE_SET | REV, ICANON, 0 ), #ifdef IEXTEN MI_ENTRY("iexten", local, SANE_SET | REV, IEXTEN, 0 ), #endif MI_ENTRY("echo", local, SANE_SET | REV, ECHO, 0 ), MI_ENTRY("echoe", local, SANE_SET | REV, ECHOE, 0 ), MI_ENTRY("crterase", local, REV | OMIT, ECHOE, 0 ), MI_ENTRY("echok", local, SANE_SET | REV, ECHOK, 0 ), MI_ENTRY("echonl", local, SANE_UNSET | REV, ECHONL, 0 ), MI_ENTRY("noflsh", local, SANE_UNSET | REV, NOFLSH, 0 ), #ifdef XCASE MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 ), #endif #ifdef TOSTOP MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 ), #endif #ifdef ECHOPRT MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 ), MI_ENTRY("prterase", local, REV | OMIT, ECHOPRT, 0 ), #endif #ifdef ECHOCTL MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 ), MI_ENTRY("ctlecho", local, REV | OMIT, ECHOCTL, 0 ), #endif #ifdef ECHOKE MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 ), MI_ENTRY("crtkill", local, REV | OMIT, ECHOKE, 0 ), #endif MI_ENTRY(evenp, combination, REV | OMIT, 0, 0 ), MI_ENTRY(parity, combination, REV | OMIT, 0, 0 ), MI_ENTRY(stty_oddp, combination, REV | OMIT, 0, 0 ), MI_ENTRY(stty_nl, combination, REV | OMIT, 0, 0 ), MI_ENTRY(stty_ek, combination, OMIT, 0, 0 ), MI_ENTRY(stty_sane, combination, OMIT, 0, 0 ), MI_ENTRY(cooked, combination, REV | OMIT, 0, 0 ), MI_ENTRY(raw, combination, REV | OMIT, 0, 0 ), MI_ENTRY(stty_pass8, combination, REV | OMIT, 0, 0 ), MI_ENTRY(litout, combination, REV | OMIT, 0, 0 ), MI_ENTRY(cbreak, combination, REV | OMIT, 0, 0 ), #ifdef IXANY MI_ENTRY(decctlq, combination, REV | OMIT, 0, 0 ), #endif #if defined (TABDLY) || defined (OXTABS) MI_ENTRY(stty_tabs, combination, REV | OMIT, 0, 0 ), #endif #if defined(XCASE) && defined(IUCLC) && defined(OLCUC) MI_ENTRY(stty_lcase, combination, REV | OMIT, 0, 0 ), MI_ENTRY(stty_LCASE, combination, REV | OMIT, 0, 0 ), #endif MI_ENTRY(stty_crt, combination, OMIT, 0, 0 ), MI_ENTRY(stty_dec, combination, OMIT, 0, 0 ), }; enum { NUM_mode_info = (sizeof(mode_info) / sizeof(struct mode_info)) }; /* 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. */ }; /* Control characters. */ static const struct control_info control_info[] = { {"intr", CINTR, VINTR}, {"quit", CQUIT, VQUIT}, {"erase", CERASE, VERASE}, {"kill", CKILL, VKILL}, {stty_eof, CEOF, VEOF}, {stty_eol, CEOL, VEOL}, #ifdef VEOL2 {"eol2", CEOL2, VEOL2}, #endif #ifdef VSWTCH {stty_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. */ {stty_min, 1, VMIN}, {stty_time, 0, VTIME}, }; enum { NUM_control_info = (sizeof(control_info) / sizeof(struct control_info)) }; #define EMT(t) ((enum mode_type)(t)) static const char * visible(unsigned int ch); static int recover_mode(char *arg, struct termios *mode); static int screen_columns(void); static int 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 void display_window_size(int fancy); static void sane_mode(struct termios *mode); static void set_control_char(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); static const char *device_name; 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; /* 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. */ static void wrapf(const char *message, ...) { 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 const struct suffix_mult stty_suffixes[] = { {"b", 512 }, {"k", 1024}, {"B", 1024}, {NULL, 0 } }; #ifndef TEST int stty_main(int argc, char **argv) #else int main(int argc, char **argv) #endif { struct termios mode; void (*output_func)(struct termios *); int optc; int require_set_attr; int speed_was_set; int verbose_output; int recoverable_output; int k; int noargs = 1; char * file_name = NULL; output_func = display_changed; verbose_output = 0; recoverable_output = 0; /* Don't print error messages for unrecognized options. */ opterr = 0; while ((optc = getopt(argc, argv, "agF:")) != -1) { switch (optc) { case 'a': verbose_output = 1; output_func = display_all; break; case 'g': recoverable_output = 1; output_func = display_recoverable; break; case 'F': if (file_name) bb_error_msg_and_die("only one device may be specified"); file_name = optarg; break; default: /* unrecognized option */ noargs = 0; break; } if (noargs == 0) break; } if (optind < argc) noargs = 0; /* Specifying both -a and -g gets an error. */ if (verbose_output & recoverable_output) bb_error_msg_and_die ("verbose and stty-readable output styles are mutually exclusive"); /* Specifying any other arguments with -a or -g gets an error. */ if (~noargs & (verbose_output | recoverable_output)) bb_error_msg_and_die ("modes may not be set when specifying an output style"); /* FIXME: it'd be better not to open the file until we've verified that all arguments are valid. Otherwise, we could end up doing only some of the requested operations and then failing, probably leaving things in an undesirable state. */ if (file_name) { int fdflags; device_name = file_name; fclose(stdin); bb_xopen(device_name, O_RDONLY | O_NONBLOCK); if ((fdflags = fcntl(STDIN_FILENO, F_GETFL)) == -1 || fcntl(STDIN_FILENO, F_SETFL, fdflags & ~O_NONBLOCK) < 0) perror_on_device("%s: couldn't reset non-blocking mode"); } else { device_name = bb_msg_standard_input; } /* 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"); if (verbose_output | recoverable_output | noargs) { max_col = screen_columns(); current_col = 0; output_func(&mode); return EXIT_SUCCESS; } speed_was_set = 0; require_set_attr = 0; k = 0; while (++k < argc) { int match_found = 0; int reversed = 0; int i; if (argv[k][0] == '-') { char *find_dev_opt; ++argv[k]; /* Handle "-a", "-ag", "-aF/dev/foo", "-aF /dev/foo", etc. Find the options that have been parsed. This is really gross, but it's needed because stty SETTINGS look like options to getopt(), so we need to work around things in a really horrible way. If any new options are ever added to stty, the short option MUST NOT be a letter which is the first letter of one of the possible stty settings. */ find_dev_opt = strchr(argv[k], 'F'); /* find -*F* */ if(find_dev_opt) { if(find_dev_opt[1]==0) /* -*F /dev/foo */ k++; /* skip /dev/foo */ continue; /* else -*F/dev/foo - no skip */ } if(argv[k][0]=='a' || argv[k][0]=='g') continue; /* Is not options - is reverse params */ reversed = 1; } for (i = 0; i < NUM_mode_info; ++i) if (STREQ(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) bb_error_msg_and_die("invalid argument `%s'", --argv[k]); if (match_found == 0) for (i = 0; i < NUM_control_info; ++i) if (STREQ(argv[k], control_info[i].name)) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); match_found = 1; ++k; set_control_char(&control_info[i], argv[k], &mode); require_set_attr = 1; break; } if (match_found == 0) { if (STREQ(argv[k], "ispeed")) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); ++k; set_speed(input_speed, argv[k], &mode); speed_was_set = 1; require_set_attr = 1; } else if (STREQ(argv[k], "ospeed")) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); ++k; set_speed(output_speed, argv[k], &mode); speed_was_set = 1; require_set_attr = 1; } #ifdef TIOCGWINSZ else if (STREQ(argv[k], "rows")) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); ++k; set_window_size((int) bb_xparse_number(argv[k], stty_suffixes), -1); } else if (STREQ(argv[k], "cols") || STREQ(argv[k], "columns")) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); ++k; set_window_size(-1, (int) bb_xparse_number(argv[k], stty_suffixes)); } else if (STREQ(argv[k], "size")) { max_col = screen_columns(); current_col = 0; display_window_size(0); } #endif #ifdef HAVE_C_LINE else if (STREQ(argv[k], "line")) { if (k == argc - 1) bb_error_msg_and_die(bb_msg_requires_arg, argv[k]); ++k; mode.c_line = bb_xparse_number(argv[k], stty_suffixes); require_set_attr = 1; } #endif else if (STREQ(argv[k], "speed")) { max_col = screen_columns(); display_speed(&mode, 0); } else if (recover_mode(argv[k], &mode) == 1) require_set_attr = 1; 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 bb_error_msg_and_die("invalid argument `%s'", argv[k]); } } if (require_set_attr) { struct termios new_mode; if (tcsetattr(STDIN_FILENO, TCSADRAIN, &mode)) perror_on_device("%s"); /* 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. */ memset(&new_mode, 0, sizeof(new_mode)); if (tcgetattr(STDIN_FILENO, &new_mode)) perror_on_device("%s"); /* 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 perror_on_device ("%s: unable to perform all requested operations"); } } return EXIT_SUCCESS; } /* Return 0 if not applied because not reversible; otherwise return 1. */ static int set_mode(const struct mode_info *info, int reversed, struct termios *mode) { tcflag_t *bitsp; if (reversed && (info->flags & REV) == 0) return 0; 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 #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 (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 #ifdef XCASE | XCASE #endif ); mode->c_cc[VMIN] = 1; mode->c_cc[VTIME] = 0; } } #ifdef IXANY else if (info->name == decctlq) { if (reversed) mode->c_iflag |= IXANY; else mode->c_iflag &= ~IXANY; } #endif #ifdef TABDLY else if (info->name == stty_tabs) { if (reversed) mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3; else mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0; } #else # ifdef OXTABS else if (info->name == stty_tabs) { if (reversed) mode->c_oflag = mode->c_oflag | OXTABS; else mode->c_oflag = mode->c_oflag & ~OXTABS; } # endif #endif #if defined(XCASE) && defined(IUCLC) && defined(OLCUC) else if (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; } } #endif else if (info->name == stty_crt) mode->c_lflag |= ECHOE #ifdef ECHOCTL | ECHOCTL #endif #ifdef ECHOKE | ECHOKE #endif ; 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 #ifdef ECHOCTL | ECHOCTL #endif #ifdef ECHOKE | ECHOKE #endif ; #ifdef IXANY mode->c_iflag &= ~IXANY; #endif } } else if (reversed) *bitsp = *bitsp & ~((unsigned long)info->mask) & ~info->bits; else *bitsp = (*bitsp & ~((unsigned long)info->mask)) | info->bits; return 1; } static void set_control_char(const struct control_info *info, const char *arg, struct termios *mode) { unsigned char value; if (info->name == stty_min || info->name == stty_time) 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")) 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 = 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(int fd, struct winsize *win) { int err = ioctl(fd, TIOCGWINSZ, (char *) win); return err; } static void set_window_size(int rows, int cols) { struct winsize win; if (get_win_size(STDIN_FILENO, &win)) { if (errno != EINVAL) perror_on_device("%s"); memset(&win, 0, 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. */ 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(STDIN_FILENO, &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); if (!fancy) current_col = 0; } } #endif 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(STDOUT_FILENO, &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(enum mode_type type, 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 (((unsigned int) type) <= local) { return (tcflag_t *)(((char *) mode) + tcflag_offsets[(int)type]); } return NULL; } static void display_changed(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; 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 VSWTCH == VSUSP if (control_info[i].name == stty_swtch) continue; #endif /* 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 || control_info[i].name == stty_eol)) continue; #endif 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; i < NUM_mode_info; ++i) { if (mode_info[i].flags & OMIT) continue; if (EMT(mode_info[i].type) != prev_type) { if (empty_line == 0) { putchar('\n'); current_col = 0; empty_line = 1; } prev_type = EMT(mode_info[i].type); } bitsp = mode_type_flag(EMT(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(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; control_info[i].name != stty_min; ++i) { /* 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 VEOF == VMIN if ((mode->c_lflag & ICANON) == 0 && (control_info[i].name == stty_eof || control_info[i].name == stty_eol)) continue; #endif wrapf("%s = %s;", control_info[i].name, visible(mode->c_cc[control_info[i].offset])); } #if VEOF == VMIN if ((mode->c_lflag & ICANON) == 0) #endif wrapf("min = %d; time = %d;", mode->c_cc[VMIN], mode->c_cc[VTIME]); if (current_col != 0) putchar('\n'); current_col = 0; 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); } bitsp = mode_type_flag(EMT(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(struct termios *mode, int fancy) { unsigned long ispeed, ospeed; const char *fmt_str = "%lu %lu\n\0" "ispeed %lu baud; ospeed %lu baud;\0" "%lu\n\0" "\0\0\0\0" "speed %lu baud;"; ospeed = ispeed = cfgetispeed(mode); if (ispeed == 0 || ispeed == (ospeed = cfgetospeed(mode))) { ispeed = ospeed; /* in case ispeed was 0 */ fmt_str += 43; } if (fancy) { fmt_str += 9; } wrapf(fmt_str, tty_baud_to_value(ispeed), tty_baud_to_value(ospeed)); if (!fancy) current_col = 0; } static void display_recoverable(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(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; } /* Fail if there are too many fields. */ if (*arg != '\0') return 0; 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; tcflag_t *bitsp; for (i = 0; i < NUM_control_info; ++i) { #if VMIN == VEOF if (control_info[i].name == stty_min) break; #endif mode->c_cc[control_info[i].offset] = control_info[i].saneval; } 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 = (*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 = *bitsp & ~((unsigned long)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 const char *visible(unsigned int ch) { static char buf[10]; char *bpout = buf; if (ch == _POSIX_VDISABLE) { return ""; } 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 (const char *) buf; } #ifdef TEST const char *bb_applet_name = "stty"; #endif