| 1 | /*- |
| 2 | * Copyright (c) 1992, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static char copyright[] = |
| 36 | "@(#) Copyright (c) 1992, 1993\n\ |
| 37 | The Regents of the University of California. All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/9/93"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/stat.h> |
| 46 | |
| 47 | #include <ctype.h> |
| 48 | #include <err.h> |
| 49 | #include <errno.h> |
| 50 | #include <stdlib.h> |
| 51 | #include <string.h> |
| 52 | #include <termios.h> |
| 53 | #include <unistd.h> |
| 54 | |
| 55 | #if __STDC__ |
| 56 | #include <stdarg.h> |
| 57 | #else |
| 58 | #include <varargs.h> |
| 59 | #endif |
| 60 | |
| 61 | #include "vi.h" |
| 62 | #include "excmd.h" |
| 63 | #include "recover.h" |
| 64 | #include "pathnames.h" |
| 65 | #include "tag.h" |
| 66 | |
| 67 | static void msgflush __P((GS *)); |
| 68 | static void obsolete __P((char *[])); |
| 69 | static void reset __P((GS *)); |
| 70 | static void usage __P((void)); |
| 71 | |
| 72 | GS *__global_list; /* GLOBAL: List of screens. */ |
| 73 | |
| 74 | int |
| 75 | main(argc, argv) |
| 76 | int argc; |
| 77 | char *argv[]; |
| 78 | { |
| 79 | extern int optind; |
| 80 | extern char *optarg; |
| 81 | static int reenter; /* STATIC: Re-entrancy check. */ |
| 82 | EXCMDARG cmd; |
| 83 | GS *gp; |
| 84 | SCR *sp; |
| 85 | int ch, flagchk, eval; |
| 86 | char *excmdarg, *errf, *myname, *p, *rfname, *tag; |
| 87 | |
| 88 | /* Stop if indirecting through a NULL pointer. */ |
| 89 | if (reenter++) |
| 90 | abort(); |
| 91 | |
| 92 | eval = 0; |
| 93 | |
| 94 | /* Figure out the program name. */ |
| 95 | if ((myname = strrchr(*argv, '/')) == NULL) |
| 96 | myname = *argv; |
| 97 | else |
| 98 | ++myname; |
| 99 | |
| 100 | /* Build and initialize the GS structure. */ |
| 101 | if ((gp = malloc(sizeof(GS))) == NULL) |
| 102 | err(1, NULL); |
| 103 | __global_list = gp; |
| 104 | memset(gp, 0, sizeof(GS)); |
| 105 | HDR_INIT(gp->scrhdr, next, prev); |
| 106 | HDR_INIT(gp->exfhdr, next, prev); |
| 107 | if (tcgetattr(STDIN_FILENO, &gp->original_termios)) |
| 108 | err(1, "tcgetattr"); |
| 109 | |
| 110 | /* Build and initialize the first/current screen. */ |
| 111 | if ((sp = malloc(sizeof(SCR))) == NULL) |
| 112 | err(1, NULL); |
| 113 | if (scr_init(NULL, sp)) |
| 114 | err(1, NULL); |
| 115 | sp->gp = gp; /* All screens point to the GS structure. */ |
| 116 | HDR_INIT(sp->seqhdr, next, prev); |
| 117 | /* No need to block SIGALRM yet. */ |
| 118 | HDR_APPEND(sp, &gp->scrhdr, next, prev, SCR); |
| 119 | |
| 120 | if (set_window_size(sp, 0)) /* Set the window size. */ |
| 121 | goto err1; |
| 122 | |
| 123 | if (opts_init(sp)) /* Options initialization. */ |
| 124 | goto err1; |
| 125 | |
| 126 | /* |
| 127 | * Keymaps, special keys. |
| 128 | * Must follow options and sequence map initializations. |
| 129 | */ |
| 130 | if (term_init(sp)) |
| 131 | goto err1; |
| 132 | |
| 133 | #ifndef NO_DIGRAPH |
| 134 | if (digraph_init(sp)) /* Digraph initialization. */ |
| 135 | goto err1; |
| 136 | #endif |
| 137 | /* Set screen mode based on the program name. */ |
| 138 | if (!strcmp(myname, "ex") || !strcmp(myname, "nex")) |
| 139 | F_SET(sp, S_MODE_EX); |
| 140 | else if (!strcmp(myname, "view")) { |
| 141 | O_SET(sp, O_READONLY); |
| 142 | F_SET(sp, S_MODE_VI); |
| 143 | } else |
| 144 | F_SET(sp, S_MODE_VI); |
| 145 | |
| 146 | /* Convert old-style arguments into new-style ones. */ |
| 147 | obsolete(argv); |
| 148 | |
| 149 | /* Parse the arguments. */ |
| 150 | flagchk = 0; |
| 151 | F_SET(gp, G_SNAPSHOT); |
| 152 | excmdarg = errf = rfname = tag = NULL; |
| 153 | while ((ch = getopt(argc, argv, "c:elmRr:sT:t:v")) != EOF) |
| 154 | switch(ch) { |
| 155 | case 'c': /* Run the command. */ |
| 156 | excmdarg = optarg; |
| 157 | break; |
| 158 | case 'e': /* Ex mode. */ |
| 159 | F_SET(sp, S_MODE_EX); |
| 160 | break; |
| 161 | case 'l': |
| 162 | exit(rcv_list()); |
| 163 | #ifndef NO_ERRLIST |
| 164 | case 'm': /* Error list. */ |
| 165 | ++flagchk; |
| 166 | errf = optarg; |
| 167 | break; |
| 168 | #endif |
| 169 | case 'R': /* Readonly. */ |
| 170 | O_SET(sp,O_READONLY); |
| 171 | break; |
| 172 | case 'r': /* Recover. */ |
| 173 | ++flagchk; |
| 174 | rfname = optarg; |
| 175 | break; |
| 176 | case 's': /* No snapshot. */ |
| 177 | F_CLR(gp, G_SNAPSHOT); |
| 178 | break; |
| 179 | #ifdef DEBUG |
| 180 | case 'T': /* Trace. */ |
| 181 | if ((gp->tracefp = fopen(optarg, "w")) == NULL) |
| 182 | err(1, "%s", optarg); |
| 183 | (void)fprintf(gp->tracefp, |
| 184 | "\n===\ntrace: open %s\n", optarg); |
| 185 | break; |
| 186 | #endif |
| 187 | case 't': /* Tag. */ |
| 188 | ++flagchk; |
| 189 | tag = optarg; |
| 190 | break; |
| 191 | case 'v': /* Vi mode. */ |
| 192 | F_SET(sp, S_MODE_VI); |
| 193 | break; |
| 194 | case '?': |
| 195 | default: |
| 196 | usage(); |
| 197 | } |
| 198 | argc -= optind; |
| 199 | argv += optind; |
| 200 | |
| 201 | /* Only permit one file specification. */ |
| 202 | if (flagchk > 1) |
| 203 | err(1, "only one of -r and -t is permitted."); |
| 204 | |
| 205 | /* |
| 206 | * Source the system, environment, ~user and local .exrc values. |
| 207 | * If the environment exists, vi historically doesn't check ~user. |
| 208 | */ |
| 209 | (void)ex_cfile(sp, NULL, _PATH_SYSEXRC, 0); |
| 210 | |
| 211 | /* Source the EXINIT environment variable. */ |
| 212 | if ((p = getenv("EXINIT")) != NULL) |
| 213 | if ((p = strdup(p)) == NULL) { |
| 214 | msgq(sp, M_ERR, "Error: %s", strerror(errno)); |
| 215 | goto err1; |
| 216 | } else { |
| 217 | (void)ex_cstring(sp, NULL, p, strlen(p)); |
| 218 | free(p); |
| 219 | } |
| 220 | else if ((p = getenv("HOME")) != NULL && *p) { |
| 221 | char path[MAXPATHLEN]; |
| 222 | |
| 223 | (void)snprintf(path, sizeof(path), "%s/.exrc", p); |
| 224 | (void)ex_cfile(sp, NULL, path, 0); |
| 225 | } |
| 226 | if (O_ISSET(sp, O_EXRC)) |
| 227 | (void)ex_cfile(sp, NULL, _PATH_EXRC, 0); |
| 228 | |
| 229 | /* Any remaining arguments are file names. */ |
| 230 | if (argc) |
| 231 | file_set(sp, argc, argv); |
| 232 | |
| 233 | /* Use an error list file, recovery file or tag file if specified. */ |
| 234 | #ifndef NO_ERRLIST |
| 235 | if (errf != NULL) { |
| 236 | SETCMDARG(cmd, C_ERRLIST, 0, OOBLNO, 0, 0, errf); |
| 237 | if (ex_errlist(sp, NULL, &cmd)) |
| 238 | goto err1; |
| 239 | } else |
| 240 | #endif |
| 241 | if (tag != NULL) { |
| 242 | if (ex_tagfirst(sp, tag)) |
| 243 | goto err1; |
| 244 | } else if (rfname != NULL) { |
| 245 | if ((sp->ep = rcv_read(sp, rfname)) == NULL) |
| 246 | goto err1; |
| 247 | } else if ((sp->ep = file_start(sp, file_first(sp, 1), NULL)) == NULL) |
| 248 | goto err1; |
| 249 | |
| 250 | /* Do commands from the command line. */ |
| 251 | if (excmdarg != NULL) |
| 252 | (void)ex_cstring(sp, sp->ep, excmdarg, strlen(excmdarg)); |
| 253 | |
| 254 | /* |
| 255 | * The commands we executed probably positioned the file. This |
| 256 | * isn't a wonderful test, but it's probably fairly safe. |
| 257 | */ |
| 258 | if ((sp->lno != 1 || sp->cno != 0) && F_ISSET(sp->ep, F_NOSETPOS)) |
| 259 | F_CLR(sp->ep, F_NOSETPOS); |
| 260 | |
| 261 | /* Call a screen. */ |
| 262 | while (sp != NULL) |
| 263 | switch(F_ISSET(sp, S_MODE_EX | S_MODE_VI)) { |
| 264 | case S_MODE_EX: |
| 265 | if (sex(sp, sp->ep, &sp)) |
| 266 | goto err2; |
| 267 | break; |
| 268 | case S_MODE_VI: |
| 269 | if (svi(sp, sp->ep, &sp)) |
| 270 | goto err2; |
| 271 | break; |
| 272 | default: |
| 273 | abort(); |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * Two error paths. The first means that something failed before |
| 278 | * we called a screen routine. Swap the message pointers between |
| 279 | * the SCR and the GS, so messages get displayed. The second is |
| 280 | * something failed in a screen. NOTE: sp may be GONE when the |
| 281 | * screen returns, so only the gp can be trusted. |
| 282 | */ |
| 283 | if (0) { |
| 284 | err1: gp->msgp = sp->msgp; |
| 285 | err2: eval = 1; |
| 286 | } |
| 287 | |
| 288 | /* Turn off the recovery timer. */ |
| 289 | rcv_end(); |
| 290 | |
| 291 | /* Reset anything that needs resetting. */ |
| 292 | reset(gp); |
| 293 | |
| 294 | /* Flush any left-over error messages. */ |
| 295 | msgflush(gp); |
| 296 | |
| 297 | if (tcsetattr(STDIN_FILENO, TCSADRAIN, &gp->original_termios)) |
| 298 | err(1, "tcsetattr"); |
| 299 | exit(eval); |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * reset -- |
| 304 | * Reset any changed global state. |
| 305 | */ |
| 306 | static void |
| 307 | reset(gp) |
| 308 | GS *gp; |
| 309 | { |
| 310 | char *tty; |
| 311 | |
| 312 | if (gp->flags & G_SETMODE) /* O_MESG */ |
| 313 | if ((tty = ttyname(STDERR_FILENO)) == NULL) |
| 314 | warn("ttyname"); |
| 315 | else if (chmod(tty, gp->origmode) < 0) |
| 316 | warn("%s", tty); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * msgflush -- |
| 321 | * Flush any remaining messages. |
| 322 | */ |
| 323 | static void |
| 324 | msgflush(gp) |
| 325 | GS *gp; |
| 326 | { |
| 327 | MSG *mp; |
| 328 | |
| 329 | /* Ring the bell. */ |
| 330 | if (F_ISSET(gp, S_BELLSCHED)) |
| 331 | (void)fprintf(stderr, "\07"); /* \a */ |
| 332 | |
| 333 | /* Display the messages. */ |
| 334 | for (mp = gp->msgp; |
| 335 | mp != NULL && !(F_ISSET(mp, M_EMPTY)); mp = mp->next) |
| 336 | (void)fprintf(stderr, "%.*s\n", (int)mp->len, mp->mbuf); |
| 337 | } |
| 338 | |
| 339 | static void |
| 340 | obsolete(argv) |
| 341 | char *argv[]; |
| 342 | { |
| 343 | size_t len; |
| 344 | char *p, *myname; |
| 345 | |
| 346 | /* |
| 347 | * Translate old style arguments into something getopt will like. |
| 348 | * Make sure it's not text space memory, because ex changes the |
| 349 | * strings. |
| 350 | * Change "+/command" into "-ccommand". |
| 351 | * Change "+" and "+$" into "-c$". |
| 352 | * Change "+[0-9]*" into "-c[0-9]". |
| 353 | * Change "-r" into "-l" |
| 354 | */ |
| 355 | for (myname = argv[0]; *++argv;) |
| 356 | if (argv[0][0] == '+') { |
| 357 | if (argv[0][1] == '\0' || argv[0][1] == '$') { |
| 358 | if ((argv[0] = malloc(4)) == NULL) |
| 359 | err(1, NULL); |
| 360 | memmove(argv[0], "-c$", 4); |
| 361 | } else if (argv[0][1] == '/') { |
| 362 | p = argv[0]; |
| 363 | len = strlen(argv[0]); |
| 364 | if ((argv[0] = malloc(len + 3)) == NULL) |
| 365 | err(1, NULL); |
| 366 | argv[0][0] = '-'; |
| 367 | argv[0][1] = 'c'; |
| 368 | (void)strcpy(argv[0] + 2, p + 1); |
| 369 | } else if (isdigit(argv[0][1])) { |
| 370 | p = argv[0]; |
| 371 | len = strlen(argv[0]); |
| 372 | if ((argv[0] = malloc(len + 2)) == NULL) |
| 373 | err(1, NULL); |
| 374 | argv[0][0] = '-'; |
| 375 | argv[0][1] = 'c'; |
| 376 | (void)strcpy(argv[0] + 2, p + 1); |
| 377 | } |
| 378 | } |
| 379 | else if (argv[0][0] == '-' && |
| 380 | argv[0][1] == 'r' && argv[1] == NULL) |
| 381 | argv[0][1] = 'l'; |
| 382 | } |
| 383 | |
| 384 | static void |
| 385 | usage() |
| 386 | { |
| 387 | (void)fprintf(stderr, |
| 388 | "usage: vi [-eRrsv] [-c command] [-m file] [-t tag]\n"); |
| 389 | exit(1); |
| 390 | } |