2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
39 static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD: src/bin/sh/show.c,v 1.11.2.3 2002/07/19 04:38:52 tjr Exp $");
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 *);
65 showtree(union node *n)
67 trputs("showtree called\n");
68 shtree(n, 1, NULL, stdout);
73 shtree(union node *n, int ind, char *pfx, FILE *fp)
92 shtree(n->nbinary.ch1, ind, NULL, fp);
95 shtree(n->nbinary.ch2, ind, NULL, fp);
103 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
108 if (n->npipe.backgnd)
114 fprintf(fp, "<node type %d>", n->type);
124 shcmd(union node *cmd, FILE *fp)
132 for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
138 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
141 switch (np->nfile.type) {
142 case NTO: s = ">"; dftfd = 1; break;
143 case NAPPEND: s = ">>"; dftfd = 1; break;
144 case NTOFD: s = ">&"; dftfd = 1; break;
145 case NCLOBBER: s = ">|"; dftfd = 1; break;
146 case NFROM: s = "<"; dftfd = 0; break;
147 case NFROMTO: s = "<>"; dftfd = 0; break;
148 case NFROMFD: s = "<&"; dftfd = 0; break;
149 default: s = "*error*"; dftfd = 0; break;
151 if (np->nfile.fd != dftfd)
152 fprintf(fp, "%d", np->nfile.fd);
154 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
155 if (np->ndup.dupfd >= 0)
156 fprintf(fp, "%d", np->ndup.dupfd);
160 sharg(np->nfile.fname, fp);
169 sharg(union node *arg, FILE *fp)
172 struct nodelist *bqlist;
175 if (arg->type != NARG) {
176 printf("<node type %d>\n", arg->type);
180 bqlist = arg->narg.backquote;
181 for (p = arg->narg.text ; *p ; p++) {
190 if (subtype == VSLENGTH)
199 switch (subtype & VSTYPE) {
232 printf("<subtype %d>", subtype);
239 case CTLBACKQ|CTLQUOTE:
242 shtree(bqlist->n, -1, NULL, fp);
254 indent(int amount, char *pfx, FILE *fp)
258 for (i = 0 ; i < amount ; i++) {
259 if (pfx && i == amount - 1)
283 if (tracefile == NULL)
292 sh_trace(const char *fmt, ...)
296 if (tracefile != NULL) {
297 (void) vfprintf(tracefile, fmt, va);
298 if (strchr(fmt, '\n'))
299 (void) fflush(tracefile);
308 if (tracefile == NULL)
322 if (tracefile == NULL)
324 putc('"', tracefile);
325 for (p = s ; *p ; p++) {
327 case '\n': c = 'n'; goto backslash;
328 case '\t': c = 't'; goto backslash;
329 case '\r': c = 'r'; goto backslash;
330 case '"': c = '"'; goto backslash;
331 case '\\': c = '\\'; goto backslash;
332 case CTLESC: c = 'e'; goto backslash;
333 case CTLVAR: c = 'v'; goto backslash;
334 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
335 case CTLBACKQ: c = 'q'; goto backslash;
336 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
337 backslash: putc('\\', tracefile);
341 if (*p >= ' ' && *p <= '~')
344 putc('\\', tracefile);
345 putc(*p >> 6 & 03, tracefile);
346 putc(*p >> 3 & 07, tracefile);
347 putc(*p & 07, tracefile);
352 putc('"', tracefile);
359 if (tracefile == NULL)
364 putc(' ', tracefile);
366 putc('\n', tracefile);
386 if ((p = getenv("HOME")) == NULL) {
397 #endif /* not_this_way */
398 if ((tracefile = fopen(s, "a")) == NULL) {
399 fprintf(stderr, "Can't open %s: %s\n", s, strerror(errno));
403 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
404 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
406 fputs("\nTracing started.\n", tracefile);