1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95"; 40 #endif 41 static const char rcsid[] = 42 "$FreeBSD$"; 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #ifdef __STDC__ 47 #include <stdarg.h> 48 #else 49 #include <varargs.h> 50 #endif 51 #if DEBUG == 2 52 #include <errno.h> 53 #endif 54 #include <errno.h> 55 56 #include "shell.h" 57 #include "parser.h" 58 #include "nodes.h" 59 #include "mystring.h" 60 #include "show.h" 61 62 63 #ifdef DEBUG 64 static void shtree __P((union node *, int, char *, FILE*)); 65 static void shcmd __P((union node *, FILE *)); 66 static void sharg __P((union node *, FILE *)); 67 static void indent __P((int, char *, FILE *)); 68 static void trstring __P((char *)); 69 70 71 void 72 showtree(n) 73 union node *n; 74 { 75 trputs("showtree called\n"); 76 shtree(n, 1, NULL, stdout); 77 } 78 79 80 static void 81 shtree(n, ind, pfx, fp) 82 union node *n; 83 int ind; 84 char *pfx; 85 FILE *fp; 86 { 87 struct nodelist *lp; 88 char *s; 89 90 if (n == NULL) 91 return; 92 93 indent(ind, pfx, fp); 94 switch(n->type) { 95 case NSEMI: 96 s = "; "; 97 goto binop; 98 case NAND: 99 s = " && "; 100 goto binop; 101 case NOR: 102 s = " || "; 103 binop: 104 shtree(n->nbinary.ch1, ind, NULL, fp); 105 /* if (ind < 0) */ 106 fputs(s, fp); 107 shtree(n->nbinary.ch2, ind, NULL, fp); 108 break; 109 case NCMD: 110 shcmd(n, fp); 111 if (ind >= 0) 112 putc('\n', fp); 113 break; 114 case NPIPE: 115 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 116 shcmd(lp->n, fp); 117 if (lp->next) 118 fputs(" | ", fp); 119 } 120 if (n->npipe.backgnd) 121 fputs(" &", fp); 122 if (ind >= 0) 123 putc('\n', fp); 124 break; 125 default: 126 fprintf(fp, "<node type %d>", n->type); 127 if (ind >= 0) 128 putc('\n', fp); 129 break; 130 } 131 } 132 133 134 135 static void 136 shcmd(cmd, fp) 137 union node *cmd; 138 FILE *fp; 139 { 140 union node *np; 141 int first; 142 char *s; 143 int dftfd; 144 145 first = 1; 146 for (np = cmd->ncmd.args ; np ; np = np->narg.next) { 147 if (! first) 148 putchar(' '); 149 sharg(np, fp); 150 first = 0; 151 } 152 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) { 153 if (! first) 154 putchar(' '); 155 switch (np->nfile.type) { 156 case NTO: s = ">"; dftfd = 1; break; 157 case NAPPEND: s = ">>"; dftfd = 1; break; 158 case NTOFD: s = ">&"; dftfd = 1; break; 159 case NFROM: s = "<"; dftfd = 0; break; 160 case NFROMFD: s = "<&"; dftfd = 0; break; 161 default: s = "*error*"; dftfd = 0; break; 162 } 163 if (np->nfile.fd != dftfd) 164 fprintf(fp, "%d", np->nfile.fd); 165 fputs(s, fp); 166 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) { 167 fprintf(fp, "%d", np->ndup.dupfd); 168 } else { 169 sharg(np->nfile.fname, fp); 170 } 171 first = 0; 172 } 173 } 174 175 176 177 static void 178 sharg(arg, fp) 179 union node *arg; 180 FILE *fp; 181 { 182 char *p; 183 struct nodelist *bqlist; 184 int subtype; 185 186 if (arg->type != NARG) { 187 printf("<node type %d>\n", arg->type); 188 fflush(stdout); 189 abort(); 190 } 191 bqlist = arg->narg.backquote; 192 for (p = arg->narg.text ; *p ; p++) { 193 switch (*p) { 194 case CTLESC: 195 putc(*++p, fp); 196 break; 197 case CTLVAR: 198 putc('$', fp); 199 putc('{', fp); 200 subtype = *++p; 201 if (subtype == VSLENGTH) 202 putc('#', fp); 203 204 while (*p != '=') 205 putc(*p++, fp); 206 207 if (subtype & VSNUL) 208 putc(':', fp); 209 210 switch (subtype & VSTYPE) { 211 case VSNORMAL: 212 putc('}', fp); 213 break; 214 case VSMINUS: 215 putc('-', fp); 216 break; 217 case VSPLUS: 218 putc('+', fp); 219 break; 220 case VSQUESTION: 221 putc('?', fp); 222 break; 223 case VSASSIGN: 224 putc('=', fp); 225 break; 226 case VSTRIMLEFT: 227 putc('#', fp); 228 break; 229 case VSTRIMLEFTMAX: 230 putc('#', fp); 231 putc('#', fp); 232 break; 233 case VSTRIMRIGHT: 234 putc('%', fp); 235 break; 236 case VSTRIMRIGHTMAX: 237 putc('%', fp); 238 putc('%', fp); 239 break; 240 case VSLENGTH: 241 break; 242 default: 243 printf("<subtype %d>", subtype); 244 } 245 break; 246 case CTLENDVAR: 247 putc('}', fp); 248 break; 249 case CTLBACKQ: 250 case CTLBACKQ|CTLQUOTE: 251 putc('$', fp); 252 putc('(', fp); 253 shtree(bqlist->n, -1, NULL, fp); 254 putc(')', fp); 255 break; 256 default: 257 putc(*p, fp); 258 break; 259 } 260 } 261 } 262 263 264 static void 265 indent(amount, pfx, fp) 266 int amount; 267 char *pfx; 268 FILE *fp; 269 { 270 int i; 271 272 for (i = 0 ; i < amount ; i++) { 273 if (pfx && i == amount - 1) 274 fputs(pfx, fp); 275 putc('\t', fp); 276 } 277 } 278 279 280 /* 281 * Debugging stuff. 282 */ 283 284 285 FILE *tracefile; 286 287 #if DEBUG == 2 288 int debug = 1; 289 #else 290 int debug = 0; 291 #endif 292 293 294 void 295 trputc(c) 296 int c; 297 { 298 if (tracefile == NULL) 299 return; 300 putc(c, tracefile); 301 if (c == '\n') 302 fflush(tracefile); 303 } 304 305 306 void 307 #ifdef __STDC__ 308 sh_trace(const char *fmt, ...) 309 #else 310 sh_trace(va_alist) 311 va_dcl 312 #endif 313 { 314 va_list va; 315 #ifdef __STDC__ 316 va_start(va, fmt); 317 #else 318 char *fmt; 319 va_start(va); 320 fmt = va_arg(va, char *); 321 #endif 322 if (tracefile != NULL) { 323 (void) vfprintf(tracefile, fmt, va); 324 if (strchr(fmt, '\n')) 325 (void) fflush(tracefile); 326 } 327 va_end(va); 328 } 329 330 331 void 332 trputs(s) 333 char *s; 334 { 335 if (tracefile == NULL) 336 return; 337 fputs(s, tracefile); 338 if (strchr(s, '\n')) 339 fflush(tracefile); 340 } 341 342 343 static void 344 trstring(s) 345 char *s; 346 { 347 char *p; 348 char c; 349 350 if (tracefile == NULL) 351 return; 352 putc('"', tracefile); 353 for (p = s ; *p ; p++) { 354 switch (*p) { 355 case '\n': c = 'n'; goto backslash; 356 case '\t': c = 't'; goto backslash; 357 case '\r': c = 'r'; goto backslash; 358 case '"': c = '"'; goto backslash; 359 case '\\': c = '\\'; goto backslash; 360 case CTLESC: c = 'e'; goto backslash; 361 case CTLVAR: c = 'v'; goto backslash; 362 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash; 363 case CTLBACKQ: c = 'q'; goto backslash; 364 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash; 365 backslash: putc('\\', tracefile); 366 putc(c, tracefile); 367 break; 368 default: 369 if (*p >= ' ' && *p <= '~') 370 putc(*p, tracefile); 371 else { 372 putc('\\', tracefile); 373 putc(*p >> 6 & 03, tracefile); 374 putc(*p >> 3 & 07, tracefile); 375 putc(*p & 07, tracefile); 376 } 377 break; 378 } 379 } 380 putc('"', tracefile); 381 } 382 383 384 void 385 trargs(ap) 386 char **ap; 387 { 388 if (tracefile == NULL) 389 return; 390 while (*ap) { 391 trstring(*ap++); 392 if (*ap) 393 putc(' ', tracefile); 394 else 395 putc('\n', tracefile); 396 } 397 fflush(tracefile); 398 } 399 400 401 void 402 opentrace() { 403 char s[100]; 404 char *getenv(); 405 #ifdef O_APPEND 406 int flags; 407 #endif 408 409 if (!debug) 410 return; 411 #ifdef not_this_way 412 { 413 char *p; 414 if ((p = getenv("HOME")) == NULL) { 415 if (geteuid() == 0) 416 p = "/"; 417 else 418 p = "/tmp"; 419 } 420 scopy(p, s); 421 strcat(s, "/trace"); 422 } 423 #else 424 scopy("./trace", s); 425 #endif /* not_this_way */ 426 if ((tracefile = fopen(s, "a")) == NULL) { 427 fprintf(stderr, "Can't open %s: %s\n", s, strerror(errno)); 428 return; 429 } 430 #ifdef O_APPEND 431 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0) 432 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND); 433 #endif 434 fputs("\nTracing started.\n", tracefile); 435 fflush(tracefile); 436 } 437 #endif /* DEBUG */ 438