/* $OpenBSD: tset.c,v 1.39 2015/11/16 03:02:40 deraadt Exp $ */ /**************************************************************************** * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /**************************************************************************** * Author: Zeyd M. Ben-Halim 1992,1995 * * and: Eric S. Raymond * * and: Thomas E. Dickey 1996-on * ****************************************************************************/ /* * tset.c - terminal initialization utility * * This code was mostly swiped from 4.4BSD tset, with some obsolescent * cruft removed and substantial portions rewritten. A Regents of the * University of California copyright applies to some portions of the * code, and is reproduced below: */ /*- * Copyright (c) 1980, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #define USE_LIBTINFO #define __INTERNAL_CAPS_VISIBLE /* we need to see has_hardware_tabs */ #include #include #include #include #include #if HAVE_GETTTYNAM && HAVE_TTYENT_H #include #endif #ifdef NeXT char *ttyname(int fd); #endif #if HAVE_SIZECHANGE # if !defined(sun) || !TERMIOS # if HAVE_SYS_IOCTL_H # include # endif # endif #endif #if NEED_PTEM_H /* they neglected to define struct winsize in termios.h -- it's only in termio.h */ #include #include #endif #include #include extern char **environ; #undef CTRL #define CTRL(x) ((x) & 0x1f) const char *_nc_progname = "tset"; static TTY mode, oldmode, original; static bool opt_c; /* set control-chars */ static bool opt_w; /* set window-size */ static bool can_restore = FALSE; static bool isreset = FALSE; /* invoked as reset */ static int terasechar = -1; /* new erase character */ static int intrchar = -1; /* new interrupt character */ static int tkillchar = -1; /* new kill character */ static int tlines, tcolumns; /* window size */ #define LOWERCASE(c) ((isalpha(UChar(c)) && isupper(UChar(c))) ? tolower(UChar(c)) : (c)) static int CaselessCmp(const char *a, const char *b) { /* strcasecmp isn't portable */ while (*a && *b) { int cmp = LOWERCASE(*a) - LOWERCASE(*b); if (cmp != 0) break; a++, b++; } return LOWERCASE(*a) - LOWERCASE(*b); } static void exit_error(void) { if (can_restore) SET_TTY(STDERR_FILENO, &original); (void) fprintf(stderr, "\n"); fflush(stderr); ExitProgram(EXIT_FAILURE); /* NOTREACHED */ } static void err(const char *fmt,...) { va_list ap; va_start(ap, fmt); (void) fprintf(stderr, "%s: ", _nc_progname); (void) vfprintf(stderr, fmt, ap); va_end(ap); exit_error(); /* NOTREACHED */ } static void failed(const char *msg) { fprintf(stderr, "%s: ", _nc_progname); perror(msg); exit_error(); /* NOTREACHED */ } static void cat(char *file) { FILE *fp; size_t nr; char buf[BUFSIZ]; if ((fp = fopen(file, "r")) == 0) failed(file); while ((nr = fread(buf, sizeof(char), sizeof(buf), fp)) != 0) if (fwrite(buf, sizeof(char), nr, stderr) != nr) failed("write to stderr"); fclose(fp); } static int outc(int c) { return putc(c, stderr); } /* Prompt the user for a terminal type. */ static const char * askuser(const char *dflt) { static char answer[256]; /* We can get recalled; if so, don't continue uselessly. */ clearerr(stdin); if (feof(stdin) || ferror(stdin)) { (void) fprintf(stderr, "\n"); exit_error(); /* NOTREACHED */ } for (;;) { if (dflt) (void) fprintf(stderr, "Terminal type? [%s] ", dflt); else (void) fprintf(stderr, "Terminal type? "); (void) fflush(stderr); if (fgets(answer, sizeof(answer), stdin) == NULL) { if (dflt == 0) { exit_error(); /* NOTREACHED */ } return (dflt); } answer[strcspn(answer, "\n")] = '\0'; if (answer[0]) return (answer); if (dflt != 0) return (dflt); } } /************************************************************************** * * Mapping logic begins here * **************************************************************************/ /* Baud rate conditionals for mapping. */ #define GT 0x01 #define EQ 0x02 #define LT 0x04 #define NOT 0x08 #define GE (GT | EQ) #define LE (LT | EQ) typedef struct map { struct map *next; /* Linked list of maps. */ const char *porttype; /* Port type, or "" for any. */ const char *type; /* Terminal type to select. */ int conditional; /* Baud rate conditionals bitmask. */ int speed; /* Baud rate to compare against. */ } MAP; static MAP *cur, *maplist; typedef struct speeds { const char *string; int speed; } SPEEDS; static const SPEEDS speeds[] = { {"0", B0}, {"50", B50}, {"75", B75}, {"110", B110}, {"134", B134}, {"134.5", B134}, {"150", B150}, {"200", B200}, {"300", B300}, {"600", B600}, {"1200", B1200}, {"1800", B1800}, {"2400", B2400}, {"4800", B4800}, {"9600", B9600}, /* sgttyb may define up to this point */ #ifdef B19200 {"19200", B19200}, #endif #ifdef B38400 {"38400", B38400}, #endif #ifdef B19200 {"19200", B19200}, #endif #ifdef B38400 {"38400", B38400}, #endif #ifdef B19200 {"19200", B19200}, #else #ifdef EXTA {"19200", EXTA}, #endif #endif #ifdef B38400 {"38400", B38400}, #else #ifdef EXTB {"38400", EXTB}, #endif #endif #ifdef B57600 {"57600", B57600}, #endif #ifdef B115200 {"115200", B115200}, #endif #ifdef B230400 {"230400", B230400}, #endif #ifdef B460800 {"460800", B460800}, #endif {(char *) 0, 0} }; static int tbaudrate(char *rate) { const SPEEDS *sp; int found = FALSE; /* The baudrate number can be preceded by a 'B', which is ignored. */ if (*rate == 'B') ++rate; for (sp = speeds; sp->string; ++sp) { if (!CaselessCmp(rate, sp->string)) { found = TRUE; break; } } if (!found) err("unknown baud rate %s", rate); return (sp->speed); } /* * Syntax for -m: * [port-type][test baudrate]:terminal-type * The baud rate tests are: >, <, @, =, ! */ static void add_mapping(const char *port, char *arg) { MAP *mapp; char *copy, *p; const char *termp; char *base = 0; copy = strdup(arg); mapp = malloc(sizeof(MAP)); if (copy == 0 || mapp == 0) failed("malloc"); mapp->next = 0; if (maplist == 0) cur = maplist = mapp; else { cur->next = mapp; cur = mapp; } mapp->porttype = arg; mapp->conditional = 0; arg = strpbrk(arg, "><@=!:"); if (arg == 0) { /* [?]term */ mapp->type = mapp->porttype; mapp->porttype = 0; goto done; } if (arg == mapp->porttype) /* [><@=! baud]:term */ termp = mapp->porttype = 0; else termp = base = arg; for (;; ++arg) { /* Optional conditionals. */ switch (*arg) { case '<': if (mapp->conditional & GT) goto badmopt; mapp->conditional |= LT; break; case '>': if (mapp->conditional & LT) goto badmopt; mapp->conditional |= GT; break; case '@': case '=': /* Not documented. */ mapp->conditional |= EQ; break; case '!': mapp->conditional |= NOT; break; default: goto next; } } next: if (*arg == ':') { if (mapp->conditional) goto badmopt; ++arg; } else { /* Optional baudrate. */ arg = strchr(p = arg, ':'); if (arg == 0) goto badmopt; *arg++ = '\0'; mapp->speed = tbaudrate(p); } if (arg == (char *) 0) /* Non-optional type. */ goto badmopt; mapp->type = arg; /* Terminate porttype, if specified. */ if (termp != 0) *base = '\0'; /* If a NOT conditional, reverse the test. */ if (mapp->conditional & NOT) mapp->conditional = ~mapp->conditional & (EQ | GT | LT); /* If user specified a port with an option flag, set it. */ done: if (port) { if (mapp->porttype) { badmopt: err("illegal -m option format: %s", copy); } mapp->porttype = port; } free(copy); #ifdef MAPDEBUG (void) printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY"); (void) printf("type: %s\n", mapp->type); (void) printf("conditional: "); p = ""; if (mapp->conditional & GT) { (void) printf("GT"); p = "/"; } if (mapp->conditional & EQ) { (void) printf("%sEQ", p); p = "/"; } if (mapp->conditional & LT) (void) printf("%sLT", p); (void) printf("\nspeed: %d\n", mapp->speed); #endif } /* * Return the type of terminal to use for a port of type 'type', as specified * by the first applicable mapping in 'map'. If no mappings apply, return * 'type'. */ static const char * mapped(const char *type) { MAP *mapp; int match; for (mapp = maplist; mapp; mapp = mapp->next) if (mapp->porttype == 0 || !strcmp(mapp->porttype, type)) { switch (mapp->conditional) { case 0: /* No test specified. */ match = TRUE; break; case EQ: match = (ospeed == mapp->speed); break; case GE: match = (ospeed >= mapp->speed); break; case GT: match = (ospeed > mapp->speed); break; case LE: match = (ospeed <= mapp->speed); break; case LT: match = (ospeed < mapp->speed); break; default: match = FALSE; } if (match) return (mapp->type); } /* No match found; return given type. */ return (type); } /************************************************************************** * * Entry fetching * **************************************************************************/ /* * Figure out what kind of terminal we're dealing with, and then read in * its termcap entry. */ static const char * get_termcap_entry(char *userarg) { int errret; char *p; const char *ttype; #if HAVE_GETTTYNAM struct ttyent *t; #else FILE *fp; #endif char *ttypath; if (userarg) { ttype = userarg; goto found; } /* Try the environment. */ if ((ttype = getenv("TERM")) != 0) goto map; if ((ttypath = ttyname(STDERR_FILENO)) != 0) { p = _nc_basename(ttypath); #if HAVE_GETTTYNAM /* * We have the 4.3BSD library call getttynam(3); that means * there's an /etc/ttys to look up device-to-type mappings in. * Try ttyname(3); check for dialup or other mapping. */ if ((t = getttynam(p))) { ttype = t->ty_type; goto map; } #else if ((fp = fopen("/etc/ttytype", "r")) != 0 || (fp = fopen("/etc/ttys", "r")) != 0) { char buffer[BUFSIZ]; char *s, *t, *d; while (fgets(buffer, sizeof(buffer), fp) != NULL) { for (s = buffer, t = d = 0; *s; s++) { if (isspace(UChar(*s))) *s = '\0'; else if (t == 0) t = s; else if (d == 0 && s != buffer && s[-1] == '\0') d = s; } if (t != 0 && d != 0 && !strcmp(d, p)) { ttype = strdup(t); fclose(fp); goto map; } } fclose(fp); } #endif /* HAVE_GETTTYNAM */ } /* If still undefined, use "unknown". */ ttype = "unknown"; map:ttype = mapped(ttype); /* * If not a path, remove TERMCAP from the environment so we get a * real entry from /etc/termcap. This prevents us from being fooled * by out of date stuff in the environment. */ found:if ((p = getenv("TERMCAP")) != 0 && !_nc_is_abs_path(p)) { /* 'unsetenv("TERMCAP")' is not portable. * The 'environ' array is better. */ int n; for (n = 0; environ[n] != 0; n++) { if (!strncmp("TERMCAP=", environ[n], 8)) { while ((environ[n] = environ[n + 1]) != 0) { n++; } break; } } } /* * ttype now contains a pointer to the type of the terminal. * If the first character is '?', ask the user. */ if (ttype[0] == '?') { if (ttype[1] != '\0') ttype = askuser(ttype + 1); else ttype = askuser(0); } /* Find the terminfo entry. If it doesn't exist, ask the user. */ while (setupterm((NCURSES_CONST char *) ttype, STDOUT_FILENO, &errret) != OK) { if (errret == 0) { (void) fprintf(stderr, "%s: unknown terminal type %s\n", _nc_progname, ttype); ttype = 0; } else { (void) fprintf(stderr, "%s: can't initialize terminal type %s (error %d)\n", _nc_progname, ttype, errret); ttype = 0; } ttype = askuser(ttype); } #if BROKEN_LINKER tgetflag("am"); /* force lib_termcap.o to be linked for 'ospeed' */ #endif return (ttype); } /************************************************************************** * * Mode-setting logic * **************************************************************************/ /* some BSD systems have these built in, some systems are missing * one or more definitions. The safest solution is to override unless the * commonly-altered ones are defined. */ #if !(defined(CERASE) && defined(CINTR) && defined(CKILL) && defined(CQUIT)) #undef CEOF #undef CERASE #undef CINTR #undef CKILL #undef CLNEXT #undef CRPRNT #undef CQUIT #undef CSTART #undef CSTOP #undef CSUSP #endif /* control-character defaults */ #ifndef CEOF #define CEOF CTRL('D') #endif #ifndef CERASE #define CERASE CTRL('H') #endif #ifndef CINTR #define CINTR 127 /* ^? */ #endif #ifndef CKILL #define CKILL CTRL('U') #endif #ifndef CLNEXT #define CLNEXT CTRL('v') #endif #ifndef CRPRNT #define CRPRNT CTRL('r') #endif #ifndef CQUIT #define CQUIT CTRL('\\') #endif #ifndef CSTART #define CSTART CTRL('Q') #endif #ifndef CSTOP #define CSTOP CTRL('S') #endif #ifndef CSUSP #define CSUSP CTRL('Z') #endif #if defined(_POSIX_VDISABLE) #define DISABLED(val) (((_POSIX_VDISABLE != -1) \ && ((val) == _POSIX_VDISABLE)) \ || ((val) <= 0)) #else #define DISABLED(val) ((int)(val) <= 0) #endif #define CHK(val, dft) (DISABLED(val) ? dft : val) static bool set_tabs(void); /* * Reset the terminal mode bits to a sensible state. Very useful after * a child program dies in raw mode. */ static void reset_mode(void) { #ifdef TERMIOS tcgetattr(STDERR_FILENO, &mode); #else stty(STDERR_FILENO, &mode); #endif #ifdef TERMIOS #if defined(VDISCARD) && defined(CDISCARD) mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD); #endif mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF); mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE); #if defined(VFLUSH) && defined(CFLUSH) mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH); #endif mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR); mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL); #if defined(VLNEXT) && defined(CLNEXT) mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT); #endif mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT); #if defined(VREPRINT) && defined(CRPRNT) mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT); #endif #if defined(VSTART) && defined(CSTART) mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART); #endif #if defined(VSTOP) && defined(CSTOP) mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP); #endif #if defined(VSUSP) && defined(CSUSP) mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP); #endif #if defined(VWERASE) && defined(CWERASE) mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE); #endif mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR #ifdef IUCLC | IUCLC #endif #ifdef IXANY | IXANY #endif | IXOFF); mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON #ifdef IMAXBEL | IMAXBEL #endif ); mode.c_oflag &= ~(0 #ifdef OLCUC | OLCUC #endif #ifdef OCRNL | OCRNL #endif #ifdef ONOCR | ONOCR #endif #ifdef ONLRET | ONLRET #endif #ifdef OFILL | OFILL #endif #ifdef OFDEL | OFDEL #endif #ifdef NLDLY | NLDLY #endif #ifdef CRDLY | CRDLY #endif #ifdef TABDLY | TABDLY #endif #ifdef BSDLY | BSDLY #endif #ifdef VTDLY | VTDLY #endif #ifdef FFDLY | FFDLY #endif ); mode.c_oflag |= (OPOST #ifdef ONLCR | ONLCR #endif ); mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | CLOCAL); mode.c_cflag |= (CS8 | CREAD); mode.c_lflag &= ~(ECHONL | NOFLSH #ifdef TOSTOP | TOSTOP #endif #ifdef ECHOPTR | ECHOPRT #endif #ifdef XCASE | XCASE #endif ); mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK #ifdef ECHOCTL | ECHOCTL #endif #ifdef ECHOKE | ECHOKE #endif ); #endif SET_TTY(STDERR_FILENO, &mode); } /* * Returns a "good" value for the erase character. This is loosely based on * the BSD4.4 logic. */ #ifdef TERMIOS static int default_erase(void) { int result; if (over_strike && key_backspace != 0 && strlen(key_backspace) == 1) result = key_backspace[0]; else result = CERASE; return result; } #endif /* * Update the values of the erase, interrupt, and kill characters in 'mode'. * * SVr4 tset (e.g., Solaris 2.5) only modifies the intr, quit or erase * characters if they're unset, or if we specify them as options. This differs * from BSD 4.4 tset, which always sets erase. */ static void set_control_chars(void) { #ifdef TERMIOS if (DISABLED(mode.c_cc[VERASE]) || terasechar >= 0) mode.c_cc[VERASE] = (terasechar >= 0) ? terasechar : default_erase(); if (DISABLED(mode.c_cc[VINTR]) || intrchar >= 0) mode.c_cc[VINTR] = (intrchar >= 0) ? intrchar : CINTR; if (DISABLED(mode.c_cc[VKILL]) || tkillchar >= 0) mode.c_cc[VKILL] = (tkillchar >= 0) ? tkillchar : CKILL; #endif } /* * Set up various conversions in 'mode', including parity, tabs, returns, * echo, and case, according to the termcap entry. If the program we're * running was named with a leading upper-case character, map external * uppercase to internal lowercase. */ static void set_conversions(void) { #ifdef __OBSOLETE__ /* * Conversion logic for some *really* ancient terminal glitches, * not supported in terminfo. Left here for succeeding generations * to marvel at. */ if (tgetflag("UC")) { #ifdef IUCLC mode.c_iflag |= IUCLC; mode.c_oflag |= OLCUC; #endif } else if (tgetflag("LC")) { #ifdef IUCLC mode.c_iflag &= ~IUCLC; mode.c_oflag &= ~OLCUC; #endif } mode.c_iflag &= ~(PARMRK | INPCK); mode.c_lflag |= ICANON; if (tgetflag("EP")) { mode.c_cflag |= PARENB; mode.c_cflag &= ~PARODD; } if (tgetflag("OP")) { mode.c_cflag |= PARENB; mode.c_cflag |= PARODD; } #endif /* __OBSOLETE__ */ #ifdef TERMIOS #ifdef ONLCR mode.c_oflag |= ONLCR; #endif mode.c_iflag |= ICRNL; mode.c_lflag |= ECHO; #ifdef OXTABS mode.c_oflag |= OXTABS; #endif /* OXTABS */ /* test used to be tgetflag("NL") */ if (newline != (char *) 0 && newline[0] == '\n' && !newline[1]) { /* Newline, not linefeed. */ #ifdef ONLCR mode.c_oflag &= ~ONLCR; #endif mode.c_iflag &= ~ICRNL; } #ifdef __OBSOLETE__ if (tgetflag("HD")) /* Half duplex. */ mode.c_lflag &= ~ECHO; #endif /* __OBSOLETE__ */ #ifdef OXTABS /* test used to be tgetflag("pt") */ if (has_hardware_tabs) /* Print tabs. */ mode.c_oflag &= ~OXTABS; #endif /* OXTABS */ mode.c_lflag |= (ECHOE | ECHOK); #endif } /* Output startup string. */ static void set_init(void) { char *p; bool settle; #ifdef __OBSOLETE__ if (pad_char != (char *) 0) /* Get/set pad character. */ PC = pad_char[0]; #endif /* OBSOLETE */ #ifdef TAB3 if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) { oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET); SET_TTY(STDERR_FILENO, &oldmode); } #endif settle = set_tabs(); if (isreset) { if ((p = reset_1string) != 0) { tputs(p, 0, outc); settle = TRUE; } if ((p = reset_2string) != 0) { tputs(p, 0, outc); settle = TRUE; } /* What about rf, rs3, as per terminfo man page? */ /* also might be nice to send rmacs, rmul, rmm */ if ((p = reset_file) != 0 || (p = init_file) != 0) { cat(p); settle = TRUE; } } if (settle) { (void) putc('\r', stderr); (void) fflush(stderr); (void) napms(1000); /* Settle the terminal. */ } } /* * Set the hardware tabs on the terminal, using the ct (clear all tabs), * st (set one tab) and ch (horizontal cursor addressing) capabilities. * This is done before if and is, so they can patch in case we blow this. * Return TRUE if we set any tab stops, FALSE if not. */ static bool set_tabs(void) { if (set_tab && clear_all_tabs) { int c; (void) putc('\r', stderr); /* Force to left margin. */ tputs(clear_all_tabs, 0, outc); for (c = 8; c < tcolumns; c += 8) { /* Get to the right column. In BSD tset, this * used to try a bunch of half-clever things * with cup and hpa, for an average saving of * somewhat less than two character times per * tab stop, less than .01 sec at 2400cps. We * lost all this cruft because it seemed to be * introducing some odd bugs. * -----------12345678----------- */ (void) fputs(" ", stderr); tputs(set_tab, 0, outc); } putc('\r', stderr); return (TRUE); } return (FALSE); } /************************************************************************** * * Main sequence * **************************************************************************/ /* * Tell the user if a control key has been changed from the default value. */ #ifdef TERMIOS static void report(const char *name, int which, unsigned def) { unsigned older, newer; char *p; newer = mode.c_cc[which]; older = oldmode.c_cc[which]; if (older == newer && older == def) return; (void) fprintf(stderr, "%s %s ", name, older == newer ? "is" : "set to"); if (DISABLED(newer)) (void) fprintf(stderr, "undef.\n"); /* * Check 'delete' before 'backspace', since the key_backspace value * is ambiguous. */ else if (newer == 0177) (void) fprintf(stderr, "delete.\n"); else if ((p = key_backspace) != 0 && newer == (unsigned char) p[0] && p[1] == '\0') (void) fprintf(stderr, "backspace.\n"); else if (newer < 040) { newer ^= 0100; (void) fprintf(stderr, "control-%c (^%c).\n", UChar(newer), UChar(newer)); } else (void) fprintf(stderr, "%c.\n", UChar(newer)); } #endif /* * Convert the obsolete argument forms into something that getopt can handle. * This means that -e, -i and -k get default arguments supplied for them. */ static void obsolete(char **argv) { for (; *argv; ++argv) { char *parm = argv[0]; if (parm[0] == '-' && parm[1] == '\0') { argv[0] = strdup("-q"); continue; } if ((parm[0] != '-') || (argv[1] && argv[1][0] != '-') || (parm[1] != 'e' && parm[1] != 'i' && parm[1] != 'k') || (parm[2] != '\0')) continue; switch (argv[0][1]) { case 'e': argv[0] = strdup("-e^H"); break; case 'i': argv[0] = strdup("-i^C"); break; case 'k': argv[0] = strdup("-k^U"); break; } } } static void usage(void) { static const char *tbl[] = { "" ,"Options:" ," -c set control characters" ," -e ch erase character" ," -I no initialization strings" ," -i ch interrupt character" ," -k ch kill character" ," -m mapping map identifier to type" ," -Q do not output control key settings" ," -r display term on stderr" ," -s output TERM set command" ," -V print curses-version" ," -w set window-size" }; unsigned n; (void) fprintf(stderr, "Usage: %s [-cIQqrsVw] [-] " "[-e ch] [-i ch] [-k ch] [-m mapping] [terminal]\n", _nc_progname); for (n = 0; n < sizeof(tbl) / sizeof(tbl[0]); ++n) fprintf(stderr, "%s\n", tbl[n]); exit_error(); /* NOTREACHED */ } static char arg_to_char(void) { return (char) ((optarg[0] == '^' && optarg[1] != '\0') ? ((optarg[1] == '?') ? '\177' : CTRL(optarg[1])) : optarg[0]); } int main(int argc, char **argv) { int ch, noinit, noset, quiet, Sflag, sflag, showterm; const char *p; const char *ttype; if (pledge("stdio rpath wpath tty", NULL) == -1) err("pledge: %s", strerror(errno)); obsolete(argv); noinit = noset = quiet = Sflag = sflag = showterm = 0; while ((ch = getopt(argc, argv, "a:cd:e:Ii:k:m:np:qQSrsVw")) != -1) { switch (ch) { case 'c': /* set control-chars */ opt_c = TRUE; break; case 'a': /* OBSOLETE: map identifier to type */ add_mapping("arpanet", optarg); break; case 'd': /* OBSOLETE: map identifier to type */ add_mapping("dialup", optarg); break; case 'e': /* erase character */ terasechar = arg_to_char(); break; case 'I': /* no initialization strings */ noinit = 1; break; case 'i': /* interrupt character */ intrchar = arg_to_char(); break; case 'k': /* kill character */ tkillchar = arg_to_char(); break; case 'm': /* map identifier to type */ add_mapping(0, optarg); break; case 'n': /* OBSOLETE: set new tty driver */ break; case 'p': /* OBSOLETE: map identifier to type */ add_mapping("plugboard", optarg); break; case 'Q': /* don't output control key settings */ quiet = 1; break; case 'q': /* display term only */ noset = 1; break; case 'r': /* display term on stderr */ showterm = 1; break; case 'S': /* OBSOLETE: output TERM & TERMCAP */ Sflag = 1; break; case 's': /* output TERM set command */ sflag = 1; break; case 'V': /* print curses-version */ puts(curses_version()); ExitProgram(EXIT_SUCCESS); case 'w': /* set window-size */ opt_w = TRUE; break; case '?': default: usage(); } } _nc_progname = _nc_rootname(*argv); argc -= optind; argv += optind; if (argc > 1) usage(); if (!opt_c && !opt_w) opt_c = opt_w = TRUE; if (GET_TTY(STDERR_FILENO, &mode) < 0) failed("standard error"); can_restore = TRUE; original = oldmode = mode; #ifdef TERMIOS ospeed = (NCURSES_OSPEED) cfgetospeed(&mode); #else ospeed = (NCURSES_OSPEED) mode.sg_ospeed; #endif if (!strcmp(_nc_progname, PROG_RESET)) { isreset = TRUE; reset_mode(); } ttype = get_termcap_entry(*argv); if (!noset) { tcolumns = columns; tlines = lines; #if HAVE_SIZECHANGE if (opt_w) { struct winsize win; /* Set window size if not set already */ (void) ioctl(STDERR_FILENO, TIOCGWINSZ, &win); if (win.ws_row == 0 && win.ws_col == 0 && tlines > 0 && tcolumns > 0) { win.ws_row = tlines; win.ws_col = tcolumns; (void) ioctl(STDERR_FILENO, TIOCSWINSZ, &win); } } #endif if (opt_c) { set_control_chars(); set_conversions(); if (!noinit) set_init(); /* Set the modes if they've changed. */ if (memcmp(&mode, &oldmode, sizeof(mode))) { SET_TTY(STDERR_FILENO, &mode); } } } /* Get the terminal name from the entry. */ ttype = _nc_first_name(cur_term->type.term_names); if (noset) (void) printf("%s\n", ttype); else { if (showterm) (void) fprintf(stderr, "Terminal type is %s.\n", ttype); /* * If erase, kill and interrupt characters could have been * modified and not -Q, display the changes. */ #ifdef TERMIOS if (!quiet) { report("Erase", VERASE, CERASE); report("Kill", VKILL, CKILL); report("Interrupt", VINTR, CINTR); } #endif } if (Sflag) err("The -S option is not supported under terminfo."); if (sflag) { int len; char *var; char *leaf; /* * Figure out what shell we're using. A hack, we look for an * environmental variable SHELL ending in "csh". */ if ((var = getenv("SHELL")) != 0 && ((len = (int) strlen(leaf = _nc_basename(var))) >= 3) && !strcmp(leaf + len - 3, "csh")) p = "set noglob;\nsetenv TERM %s;\nunset noglob;\n"; else p = "TERM=%s;\n"; (void) printf(p, ttype); } ExitProgram(EXIT_SUCCESS); }