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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1997-2005
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* Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
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* This code is derived from software contributed to Berkeley by
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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static void shtree(union node *, int, char *, FILE*);
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static void shcmd(union node *, FILE *);
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static void sharg(union node *, FILE *);
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static void indent(int, char *, FILE *);
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static void trstring(char *);
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showtree(union node *n)
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trputs("showtree called\n");
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shtree(n, 1, NULL, stdout);
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shtree(union node *n, int ind, char *pfx, FILE *fp)
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shtree(n->nbinary.ch1, ind, NULL, fp);
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shtree(n->nbinary.ch2, ind, NULL, fp);
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for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
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fprintf(fp, "<node type %d>", n->type);
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shcmd(union node *cmd, FILE *fp)
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for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
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for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
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switch (np->nfile.type) {
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case NTO: s = ">"; dftfd = 1; break;
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case NCLOBBER: s = ">|"; dftfd = 1; break;
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case NAPPEND: s = ">>"; dftfd = 1; break;
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case NTOFD: s = ">&"; dftfd = 1; break;
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case NFROM: s = "<"; dftfd = 0; break;
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case NFROMFD: s = "<&"; dftfd = 0; break;
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case NFROMTO: s = "<>"; dftfd = 0; break;
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default: s = "*error*"; dftfd = 0; break;
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if (np->nfile.fd != dftfd)
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fprintf(fp, "%d", np->nfile.fd);
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if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
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fprintf(fp, "%d", np->ndup.dupfd);
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sharg(np->nfile.fname, fp);
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sharg(union node *arg, FILE *fp)
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struct nodelist *bqlist;
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if (arg->type != NARG) {
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printf("<node type %d>\n", arg->type);
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bqlist = arg->narg.backquote;
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for (p = arg->narg.text ; *p ; p++) {
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if (subtype == VSLENGTH)
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switch (subtype & VSTYPE) {
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printf("<subtype %d>", subtype);
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case CTLBACKQ|CTLQUOTE:
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shtree(bqlist->n, -1, NULL, fp);
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indent(int amount, char *pfx, FILE *fp)
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for (i = 0 ; i < amount ; i++) {
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if (pfx && i == amount - 1)
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trace(const char *fmt, ...)
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(void) vfprintf(tracefile, fmt, va);
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tracev(const char *fmt, va_list va)
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(void) vfprintf(tracefile, fmt, va);
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trputs(const char *s)
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putc('"', tracefile);
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for (p = s ; *p ; p++) {
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case '\n': c = 'n'; goto backslash;
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case '\t': c = 't'; goto backslash;
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case '\r': c = 'r'; goto backslash;
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case '"': c = '"'; goto backslash;
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case '\\': c = '\\'; goto backslash;
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case CTLESC: c = 'e'; goto backslash;
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case CTLVAR: c = 'v'; goto backslash;
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case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
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case CTLBACKQ: c = 'q'; goto backslash;
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case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
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backslash: putc('\\', tracefile);
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if (*p >= ' ' && *p <= '~')
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putc('\\', tracefile);
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putc(*p >> 6 & 03, tracefile);
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putc(*p >> 3 & 07, tracefile);
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putc(*p & 07, tracefile);
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putc('"', tracefile);
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putc(' ', tracefile);
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putc('\n', tracefile);
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/* leave open because libedit might be using it */
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if ((p = getenv(homestr)) == NULL) {
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#endif /* not_this_way */
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if (!freopen(s, "a", tracefile)) {
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fprintf(stderr, "Can't re-open %s\n", s);
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if ((tracefile = fopen(s, "a")) == NULL) {
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fprintf(stderr, "Can't open %s\n", s);
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if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
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fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
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setlinebuf(tracefile);
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fputs("\nTracing started.\n", tracefile);