1 /* $NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Kenneth Almquist. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95"; 39 #else 40 __RCSID("$NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include <stdio.h> 45 #include <stdarg.h> 46 #include <stdlib.h> 47 48 #include "shell.h" 49 #include "parser.h" 50 #include "nodes.h" 51 #include "mystring.h" 52 #include "show.h" 53 #include "options.h" 54 55 56 #ifdef DEBUG 57 static void shtree(union node *, int, char *, FILE*); 58 static void shcmd(union node *, FILE *); 59 static void sharg(union node *, FILE *); 60 static void indent(int, char *, FILE *); 61 static void trstring(char *); 62 63 64 void 65 showtree(union node *n) 66 { 67 trputs("showtree called\n"); 68 shtree(n, 1, NULL, stdout); 69 } 70 71 72 static void 73 shtree(union node *n, int ind, char *pfx, FILE *fp) 74 { 75 struct nodelist *lp; 76 const char *s; 77 78 if (n == NULL) 79 return; 80 81 indent(ind, pfx, fp); 82 switch(n->type) { 83 case NSEMI: 84 s = "; "; 85 goto binop; 86 case NAND: 87 s = " && "; 88 goto binop; 89 case NOR: 90 s = " || "; 91 binop: 92 shtree(n->nbinary.ch1, ind, NULL, fp); 93 /* if (ind < 0) */ 94 fputs(s, fp); 95 shtree(n->nbinary.ch2, ind, NULL, fp); 96 break; 97 case NCMD: 98 shcmd(n, fp); 99 if (ind >= 0) 100 putc('\n', fp); 101 break; 102 case NPIPE: 103 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 104 shcmd(lp->n, fp); 105 if (lp->next) 106 fputs(" | ", fp); 107 } 108 if (n->npipe.backgnd) 109 fputs(" &", fp); 110 if (ind >= 0) 111 putc('\n', fp); 112 break; 113 default: 114 fprintf(fp, "<node type %d>", n->type); 115 if (ind >= 0) 116 putc('\n', fp); 117 break; 118 } 119 } 120 121 122 123 static void 124 shcmd(union node *cmd, FILE *fp) 125 { 126 union node *np; 127 int first; 128 const char *s; 129 int dftfd; 130 131 first = 1; 132 for (np = cmd->ncmd.args ; np ; np = np->narg.next) { 133 if (! first) 134 putchar(' '); 135 sharg(np, fp); 136 first = 0; 137 } 138 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) { 139 if (! first) 140 putchar(' '); 141 switch (np->nfile.type) { 142 case NTO: s = ">"; dftfd = 1; break; 143 case NCLOBBER: s = ">|"; dftfd = 1; break; 144 case NAPPEND: s = ">>"; dftfd = 1; break; 145 case NTOFD: s = ">&"; dftfd = 1; break; 146 case NFROM: s = "<"; dftfd = 0; break; 147 case NFROMFD: s = "<&"; dftfd = 0; break; 148 case NFROMTO: s = "<>"; dftfd = 0; break; 149 default: s = "*error*"; dftfd = 0; break; 150 } 151 if (np->nfile.fd != dftfd) 152 fprintf(fp, "%d", np->nfile.fd); 153 fputs(s, fp); 154 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) { 155 fprintf(fp, "%d", np->ndup.dupfd); 156 } else { 157 sharg(np->nfile.fname, fp); 158 } 159 first = 0; 160 } 161 } 162 163 164 165 static void 166 sharg(union node *arg, FILE *fp) 167 { 168 char *p; 169 struct nodelist *bqlist; 170 int subtype; 171 172 if (arg->type != NARG) { 173 printf("<node type %d>\n", arg->type); 174 abort(); 175 } 176 bqlist = arg->narg.backquote; 177 for (p = arg->narg.text ; *p ; p++) { 178 switch (*p) { 179 case CTLESC: 180 putc(*++p, fp); 181 break; 182 case CTLVAR: 183 putc('$', fp); 184 putc('{', fp); 185 subtype = *++p; 186 if (subtype == VSLENGTH) 187 putc('#', fp); 188 189 while (*p != '=') 190 putc(*p++, fp); 191 192 if (subtype & VSNUL) 193 putc(':', fp); 194 195 switch (subtype & VSTYPE) { 196 case VSNORMAL: 197 putc('}', fp); 198 break; 199 case VSMINUS: 200 putc('-', fp); 201 break; 202 case VSPLUS: 203 putc('+', fp); 204 break; 205 case VSQUESTION: 206 putc('?', fp); 207 break; 208 case VSASSIGN: 209 putc('=', fp); 210 break; 211 case VSTRIMLEFT: 212 putc('#', fp); 213 break; 214 case VSTRIMLEFTMAX: 215 putc('#', fp); 216 putc('#', fp); 217 break; 218 case VSTRIMRIGHT: 219 putc('%', fp); 220 break; 221 case VSTRIMRIGHTMAX: 222 putc('%', fp); 223 putc('%', fp); 224 break; 225 case VSLENGTH: 226 break; 227 default: 228 printf("<subtype %d>", subtype); 229 } 230 break; 231 case CTLENDVAR: 232 putc('}', fp); 233 break; 234 case CTLBACKQ: 235 case CTLBACKQ|CTLQUOTE: 236 putc('$', fp); 237 putc('(', fp); 238 shtree(bqlist->n, -1, NULL, fp); 239 putc(')', fp); 240 break; 241 default: 242 putc(*p, fp); 243 break; 244 } 245 } 246 } 247 248 249 static void 250 indent(int amount, char *pfx, FILE *fp) 251 { 252 int i; 253 254 for (i = 0 ; i < amount ; i++) { 255 if (pfx && i == amount - 1) 256 fputs(pfx, fp); 257 putc('\t', fp); 258 } 259 } 260 #endif 261 262 263 264 /* 265 * Debugging stuff. 266 */ 267 268 269 FILE *tracefile; 270 271 272 #ifdef DEBUG 273 void 274 trputc(int c) 275 { 276 if (debug != 1) 277 return; 278 putc(c, tracefile); 279 } 280 #endif 281 282 void 283 trace(const char *fmt, ...) 284 { 285 #ifdef DEBUG 286 va_list va; 287 288 if (debug != 1) 289 return; 290 va_start(va, fmt); 291 (void) vfprintf(tracefile, fmt, va); 292 va_end(va); 293 #endif 294 } 295 296 void 297 tracev(const char *fmt, va_list va) 298 { 299 #ifdef DEBUG 300 if (debug != 1) 301 return; 302 (void) vfprintf(tracefile, fmt, va); 303 #endif 304 } 305 306 307 #ifdef DEBUG 308 void 309 trputs(const char *s) 310 { 311 if (debug != 1) 312 return; 313 fputs(s, tracefile); 314 } 315 316 317 static void 318 trstring(char *s) 319 { 320 char *p; 321 char c; 322 323 if (debug != 1) 324 return; 325 putc('"', tracefile); 326 for (p = s ; *p ; p++) { 327 switch (*p) { 328 case '\n': c = 'n'; goto backslash; 329 case '\t': c = 't'; goto backslash; 330 case '\r': c = 'r'; goto backslash; 331 case '"': c = '"'; goto backslash; 332 case '\\': c = '\\'; goto backslash; 333 case CTLESC: c = 'e'; goto backslash; 334 case CTLVAR: c = 'v'; goto backslash; 335 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash; 336 case CTLBACKQ: c = 'q'; goto backslash; 337 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash; 338 backslash: putc('\\', tracefile); 339 putc(c, tracefile); 340 break; 341 default: 342 if (*p >= ' ' && *p <= '~') 343 putc(*p, tracefile); 344 else { 345 putc('\\', tracefile); 346 putc(*p >> 6 & 03, tracefile); 347 putc(*p >> 3 & 07, tracefile); 348 putc(*p & 07, tracefile); 349 } 350 break; 351 } 352 } 353 putc('"', tracefile); 354 } 355 #endif 356 357 358 void 359 trargs(char **ap) 360 { 361 #ifdef DEBUG 362 if (debug != 1) 363 return; 364 while (*ap) { 365 trstring(*ap++); 366 if (*ap) 367 putc(' ', tracefile); 368 else 369 putc('\n', tracefile); 370 } 371 #endif 372 } 373 374 375 #ifdef DEBUG 376 void 377 opentrace(void) 378 { 379 char s[100]; 380 #ifdef O_APPEND 381 int flags; 382 #endif 383 384 if (debug != 1) { 385 if (tracefile) 386 fflush(tracefile); 387 /* leave open because libedit might be using it */ 388 return; 389 } 390 #ifdef not_this_way 391 { 392 char *p; 393 if ((p = getenv("HOME")) == NULL) { 394 if (geteuid() == 0) 395 p = "/"; 396 else 397 p = "/tmp"; 398 } 399 scopy(p, s); 400 strcat(s, "/trace"); 401 } 402 #else 403 scopy("./trace", s); 404 #endif /* not_this_way */ 405 if (tracefile) { 406 if (!freopen(s, "a", tracefile)) { 407 fprintf(stderr, "Can't re-open %s\n", s); 408 debug = 0; 409 return; 410 } 411 } else { 412 if ((tracefile = fopen(s, "a")) == NULL) { 413 fprintf(stderr, "Can't open %s\n", s); 414 debug = 0; 415 return; 416 } 417 } 418 #ifdef O_APPEND 419 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0) 420 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND); 421 #endif 422 setlinebuf(tracefile); 423 fputs("\nTracing started.\n", tracefile); 424 } 425 #endif /* DEBUG */ 426
