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1.1 ! root 1: /* Copyright (c) 1981 Regents of the University of California */ ! 2: static char *sccsid = "@(#)ex.c 7.1 7/8/81"; ! 3: #include "ex.h" ! 4: #include "ex_argv.h" ! 5: #include "ex_temp.h" ! 6: #include "ex_tty.h" ! 7: ! 8: #ifdef TRACE ! 9: char tttrace[] = { '/','d','e','v','/','t','t','y','x','x',0 }; ! 10: #endif ! 11: ! 12: /* ! 13: * The code for ex is divided as follows: ! 14: * ! 15: * ex.c Entry point and routines handling interrupt, hangup ! 16: * signals; initialization code. ! 17: * ! 18: * ex_addr.c Address parsing routines for command mode decoding. ! 19: * Routines to set and check address ranges on commands. ! 20: * ! 21: * ex_cmds.c Command mode command decoding. ! 22: * ! 23: * ex_cmds2.c Subroutines for command decoding and processing of ! 24: * file names in the argument list. Routines to print ! 25: * messages and reset state when errors occur. ! 26: * ! 27: * ex_cmdsub.c Subroutines which implement command mode functions ! 28: * such as append, delete, join. ! 29: * ! 30: * ex_data.c Initialization of options. ! 31: * ! 32: * ex_get.c Command mode input routines. ! 33: * ! 34: * ex_io.c General input/output processing: file i/o, unix ! 35: * escapes, filtering, source commands, preserving ! 36: * and recovering. ! 37: * ! 38: * ex_put.c Terminal driving and optimizing routines for low-level ! 39: * output (cursor-positioning); output line formatting ! 40: * routines. ! 41: * ! 42: * ex_re.c Global commands, substitute, regular expression ! 43: * compilation and execution. ! 44: * ! 45: * ex_set.c The set command. ! 46: * ! 47: * ex_subr.c Loads of miscellaneous subroutines. ! 48: * ! 49: * ex_temp.c Editor buffer routines for main buffer and also ! 50: * for named buffers (Q registers if you will.) ! 51: * ! 52: * ex_tty.c Terminal dependent initializations from termcap ! 53: * data base, grabbing of tty modes (at beginning ! 54: * and after escapes). ! 55: * ! 56: * ex_unix.c Routines for the ! command and its variations. ! 57: * ! 58: * ex_v*.c Visual/open mode routines... see ex_v.c for a ! 59: * guide to the overall organization. ! 60: */ ! 61: ! 62: /* ! 63: * Main procedure. Process arguments and then ! 64: * transfer control to the main command processing loop ! 65: * in the routine commands. We are entered as either "ex", "edit", "vi" ! 66: * or "view" and the distinction is made here. Actually, we are "vi" if ! 67: * there is a 'v' in our name, "view" is there is a 'w', and "edit" if ! 68: * there is a 'd' in our name. For edit we just diddle options; ! 69: * for vi we actually force an early visual command. ! 70: */ ! 71: main(ac, av) ! 72: register int ac; ! 73: register char *av[]; ! 74: { ! 75: #ifndef VMUNIX ! 76: char *erpath = EXSTRINGS; ! 77: #endif ! 78: register char *cp; ! 79: register int c; ! 80: bool recov = 0; ! 81: bool ivis; ! 82: bool itag = 0; ! 83: bool fast = 0; ! 84: extern int onemt(); ! 85: #ifdef TRACE ! 86: register char *tracef; ! 87: #endif ! 88: ! 89: /* ! 90: * Immediately grab the tty modes so that we wont ! 91: * get messed up if an interrupt comes in quickly. ! 92: */ ! 93: gTTY(1); ! 94: #ifndef USG3TTY ! 95: normf = tty.sg_flags; ! 96: #else ! 97: normf = tty; ! 98: #endif ! 99: ppid = getpid(); ! 100: /* ! 101: * Defend against d's, v's, w's, and a's in directories of ! 102: * path leading to our true name. ! 103: */ ! 104: av[0] = tailpath(av[0]); ! 105: ! 106: /* ! 107: * Figure out how we were invoked: ex, edit, vi, view. ! 108: */ ! 109: ivis = any('v', av[0]); /* "vi" */ ! 110: if (any('w', av[0])) /* "view" */ ! 111: value(READONLY) = 1; ! 112: if (any('d', av[0])) { /* "edit" */ ! 113: value(OPEN) = 0; ! 114: value(REPORT) = 1; ! 115: value(MAGIC) = 0; ! 116: } ! 117: ! 118: #ifndef VMUNIX ! 119: /* ! 120: * For debugging take files out of . if name is a.out. ! 121: */ ! 122: if (av[0][0] == 'a') ! 123: erpath = tailpath(erpath); ! 124: #endif ! 125: /* ! 126: * Open the error message file. ! 127: */ ! 128: draino(); ! 129: #ifndef VMUNIX ! 130: erfile = open(erpath+4, 0); ! 131: if (erfile < 0) { ! 132: erfile = open(erpath, 0); ! 133: } ! 134: #endif ! 135: pstop(); ! 136: ! 137: /* ! 138: * Initialize interrupt handling. ! 139: */ ! 140: oldhup = signal(SIGHUP, SIG_IGN); ! 141: if (oldhup == SIG_DFL) ! 142: signal(SIGHUP, onhup); ! 143: oldquit = signal(SIGQUIT, SIG_IGN); ! 144: ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL; ! 145: if (signal(SIGTERM, SIG_IGN) == SIG_DFL) ! 146: signal(SIGTERM, onhup); ! 147: if (signal(SIGEMT, SIG_IGN) == SIG_DFL) ! 148: signal(SIGEMT, onemt); ! 149: ! 150: /* ! 151: * Initialize end of core pointers. ! 152: * Normally we avoid breaking back to fendcore after each ! 153: * file since this can be expensive (much core-core copying). ! 154: * If your system can scatter load processes you could do ! 155: * this as ed does, saving a little core, but it will probably ! 156: * not often make much difference. ! 157: */ ! 158: fendcore = (line *) sbrk(0); ! 159: endcore = fendcore - 2; ! 160: ! 161: /* ! 162: * Process flag arguments. ! 163: */ ! 164: ac--, av++; ! 165: while (ac && av[0][0] == '-') { ! 166: c = av[0][1]; ! 167: if (c == 0) { ! 168: hush = 1; ! 169: value(AUTOPRINT) = 0; ! 170: fast++; ! 171: } else switch (c) { ! 172: ! 173: case 'R': ! 174: value(READONLY) = 1; ! 175: break; ! 176: ! 177: #ifdef TRACE ! 178: case 'T': ! 179: if (av[0][2] == 0) ! 180: tracef = "trace"; ! 181: else { ! 182: tracef = tttrace; ! 183: tracef[8] = av[0][2]; ! 184: if (tracef[8]) ! 185: tracef[9] = av[0][3]; ! 186: else ! 187: tracef[9] = 0; ! 188: } ! 189: trace = fopen(tracef, "w"); ! 190: #define tracbuf NULL ! 191: if (trace == NULL) ! 192: printf("Trace create error\n"); ! 193: else ! 194: setbuf(trace, tracbuf); ! 195: break; ! 196: ! 197: #endif ! 198: ! 199: #ifdef LISPCODE ! 200: case 'l': ! 201: value(LISP) = 1; ! 202: value(SHOWMATCH) = 1; ! 203: break; ! 204: #endif ! 205: ! 206: case 'r': ! 207: recov++; ! 208: break; ! 209: ! 210: case 't': ! 211: if (ac > 1 && av[1][0] != '-') { ! 212: ac--, av++; ! 213: itag = 1; ! 214: /* BUG: should check for too long tag. */ ! 215: CP(lasttag, av[0]); ! 216: } ! 217: break; ! 218: ! 219: case 'v': ! 220: ivis = 1; ! 221: break; ! 222: ! 223: case 'w': ! 224: defwind = 0; ! 225: if (av[0][2] == 0) defwind = 3; ! 226: else for (cp = &av[0][2]; isdigit(*cp); cp++) ! 227: defwind = 10*defwind + *cp - '0'; ! 228: break; ! 229: ! 230: #ifdef CRYPT ! 231: case 'x': ! 232: /* -x: encrypted mode */ ! 233: xflag = 1; ! 234: break; ! 235: #endif ! 236: ! 237: default: ! 238: smerror("Unknown option %s\n", av[0]); ! 239: break; ! 240: } ! 241: ac--, av++; ! 242: } ! 243: ! 244: #ifdef SIGTSTP ! 245: if (!hush && signal(SIGTSTP, SIG_IGN) == SIG_DFL) ! 246: signal(SIGTSTP, onsusp), dosusp++; ! 247: #endif ! 248: ! 249: if (ac && av[0][0] == '+') { ! 250: firstpat = &av[0][1]; ! 251: ac--, av++; ! 252: } ! 253: ! 254: #ifdef CRYPT ! 255: if(xflag){ ! 256: key = getpass(KEYPROMPT); ! 257: kflag = crinit(key, perm); ! 258: } ! 259: #endif ! 260: ! 261: /* ! 262: * If we are doing a recover and no filename ! 263: * was given, then execute an exrecover command with ! 264: * the -r option to type out the list of saved file names. ! 265: * Otherwise set the remembered file name to the first argument ! 266: * file name so the "recover" initial command will find it. ! 267: */ ! 268: if (recov) { ! 269: if (ac == 0) { ! 270: ppid = 0; ! 271: setrupt(); ! 272: execl(EXRECOVER, "exrecover", "-r", 0); ! 273: filioerr(EXRECOVER); ! 274: exit(1); ! 275: } ! 276: CP(savedfile, *av++), ac--; ! 277: } ! 278: ! 279: /* ! 280: * Initialize the argument list. ! 281: */ ! 282: argv0 = av; ! 283: argc0 = ac; ! 284: args0 = av[0]; ! 285: erewind(); ! 286: ! 287: /* ! 288: * Initialize a temporary file (buffer) and ! 289: * set up terminal environment. Read user startup commands. ! 290: */ ! 291: if (setexit() == 0) { ! 292: setrupt(); ! 293: intty = isatty(0); ! 294: value(PROMPT) = intty; ! 295: if (cp = getenv("SHELL")) ! 296: CP(shell, cp); ! 297: if (fast || !intty) ! 298: setterm("dumb"); ! 299: else { ! 300: gettmode(); ! 301: if ((cp = getenv("TERM")) != 0 && *cp) ! 302: setterm(cp); ! 303: } ! 304: } ! 305: if (setexit() == 0 && !fast && intty) { ! 306: if ((globp = getenv("EXINIT")) && *globp) ! 307: commands(1,1); ! 308: else { ! 309: globp = 0; ! 310: if ((cp = getenv("HOME")) != 0 && *cp) ! 311: source(strcat(strcpy(genbuf, cp), "/.exrc"), 1); ! 312: } ! 313: /* ! 314: * Allow local .exrc too. This loses if . is $HOME, ! 315: * but nobody should notice unless they do stupid things ! 316: * like putting a version command in .exrc. Besides, ! 317: * they should be using EXINIT, not .exrc, right? ! 318: */ ! 319: source(".exrc", 1); ! 320: } ! 321: init(); /* moved after prev 2 chunks to fix directory option */ ! 322: ! 323: /* ! 324: * Initial processing. Handle tag, recover, and file argument ! 325: * implied next commands. If going in as 'vi', then don't do ! 326: * anything, just set initev so we will do it later (from within ! 327: * visual). ! 328: */ ! 329: if (setexit() == 0) { ! 330: if (recov) ! 331: globp = "recover"; ! 332: else if (itag) ! 333: globp = ivis ? "tag" : "tag|p"; ! 334: else if (argc) ! 335: globp = "next"; ! 336: if (ivis) ! 337: initev = globp; ! 338: else if (globp) { ! 339: inglobal = 1; ! 340: commands(1, 1); ! 341: inglobal = 0; ! 342: } ! 343: } ! 344: ! 345: /* ! 346: * Vi command... go into visual. ! 347: * Strange... everything in vi usually happens ! 348: * before we ever "start". ! 349: */ ! 350: if (ivis) { ! 351: /* ! 352: * Don't have to be upward compatible with stupidity ! 353: * of starting editing at line $. ! 354: */ ! 355: if (dol > zero) ! 356: dot = one; ! 357: globp = "visual"; ! 358: if (setexit() == 0) ! 359: commands(1, 1); ! 360: } ! 361: ! 362: /* ! 363: * Clear out trash in state accumulated by startup, ! 364: * and then do the main command loop for a normal edit. ! 365: * If you quit out of a 'vi' command by doing Q or ^\, ! 366: * you also fall through to here. ! 367: */ ! 368: seenprompt = 1; ! 369: ungetchar(0); ! 370: globp = 0; ! 371: initev = 0; ! 372: setlastchar('\n'); ! 373: setexit(); ! 374: commands(0, 0); ! 375: cleanup(1); ! 376: exit(0); ! 377: } ! 378: ! 379: /* ! 380: * Initialization, before editing a new file. ! 381: * Main thing here is to get a new buffer (in fileinit), ! 382: * rest is peripheral state resetting. ! 383: */ ! 384: init() ! 385: { ! 386: register int i; ! 387: ! 388: fileinit(); ! 389: dot = zero = truedol = unddol = dol = fendcore; ! 390: one = zero+1; ! 391: undkind = UNDNONE; ! 392: chng = 0; ! 393: edited = 0; ! 394: for (i = 0; i <= 'z'-'a'+1; i++) ! 395: names[i] = 1; ! 396: anymarks = 0; ! 397: #ifdef CRYPT ! 398: if(xflag) { ! 399: xtflag = 1; ! 400: makekey(key, tperm); ! 401: } ! 402: #endif ! 403: } ! 404: ! 405: /* ! 406: * Return last component of unix path name p. ! 407: */ ! 408: char * ! 409: tailpath(p) ! 410: register char *p; ! 411: { ! 412: register char *r; ! 413: ! 414: for (r=p; *p; p++) ! 415: if (*p == '/') ! 416: r = p+1; ! 417: return(r); ! 418: }
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