aa9caaf657
merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
444 lines
8.3 KiB
C
444 lines
8.3 KiB
C
/*-
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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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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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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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* are met:
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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*
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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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* SUCH DAMAGE.
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*
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* $Id: show.c,v 1.2 1994/09/24 02:58:16 davidg Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95";
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#endif /* not lint */
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#include <stdio.h>
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include "shell.h"
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#include "parser.h"
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#include "nodes.h"
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#include "mystring.h"
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#include "show.h"
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#ifdef DEBUG
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static void shtree __P((union node *, int, char *, FILE*));
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static void shcmd __P((union node *, FILE *));
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static void sharg __P((union node *, FILE *));
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static void indent __P((int, char *, FILE *));
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static void trstring __P((char *));
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void
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showtree(n)
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union node *n;
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{
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trputs("showtree called\n");
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shtree(n, 1, NULL, stdout);
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}
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static void
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shtree(n, ind, pfx, fp)
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union node *n;
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int ind;
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char *pfx;
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FILE *fp;
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{
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struct nodelist *lp;
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char *s;
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if (n == NULL)
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return;
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indent(ind, pfx, fp);
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switch(n->type) {
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case NSEMI:
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s = "; ";
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goto binop;
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case NAND:
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s = " && ";
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goto binop;
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case NOR:
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s = " || ";
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binop:
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shtree(n->nbinary.ch1, ind, NULL, fp);
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/* if (ind < 0) */
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fputs(s, fp);
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shtree(n->nbinary.ch2, ind, NULL, fp);
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break;
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case NCMD:
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shcmd(n, fp);
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if (ind >= 0)
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putc('\n', fp);
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break;
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case NPIPE:
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for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
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shcmd(lp->n, fp);
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if (lp->next)
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fputs(" | ", fp);
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}
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if (n->npipe.backgnd)
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fputs(" &", fp);
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if (ind >= 0)
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putc('\n', fp);
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break;
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default:
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fprintf(fp, "<node type %d>", n->type);
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if (ind >= 0)
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putc('\n', fp);
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break;
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}
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}
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static void
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shcmd(cmd, fp)
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union node *cmd;
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FILE *fp;
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{
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union node *np;
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int first;
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char *s;
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int dftfd;
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first = 1;
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for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
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if (! first)
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putchar(' ');
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sharg(np, fp);
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first = 0;
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}
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for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
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if (! first)
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putchar(' ');
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switch (np->nfile.type) {
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case NTO: 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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default: s = "*error*"; dftfd = 0; break;
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}
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if (np->nfile.fd != dftfd)
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fprintf(fp, "%d", np->nfile.fd);
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fputs(s, fp);
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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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} else {
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sharg(np->nfile.fname, fp);
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}
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first = 0;
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}
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}
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static void
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sharg(arg, fp)
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union node *arg;
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FILE *fp;
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{
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char *p;
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struct nodelist *bqlist;
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int subtype;
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if (arg->type != NARG) {
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printf("<node type %d>\n", arg->type);
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fflush(stdout);
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abort();
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}
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bqlist = arg->narg.backquote;
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for (p = arg->narg.text ; *p ; p++) {
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switch (*p) {
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case CTLESC:
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putc(*++p, fp);
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break;
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case CTLVAR:
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putc('$', fp);
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putc('{', fp);
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subtype = *++p;
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if (subtype == VSLENGTH)
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putc('#', fp);
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while (*p != '=')
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putc(*p++, fp);
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if (subtype & VSNUL)
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putc(':', fp);
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switch (subtype & VSTYPE) {
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case VSNORMAL:
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putc('}', fp);
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break;
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case VSMINUS:
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putc('-', fp);
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break;
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case VSPLUS:
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putc('+', fp);
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break;
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case VSQUESTION:
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putc('?', fp);
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break;
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case VSASSIGN:
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putc('=', fp);
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break;
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case VSTRIMLEFT:
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putc('#', fp);
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break;
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case VSTRIMLEFTMAX:
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putc('#', fp);
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putc('#', fp);
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break;
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case VSTRIMRIGHT:
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putc('%', fp);
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break;
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case VSTRIMRIGHTMAX:
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putc('%', fp);
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putc('%', fp);
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break;
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case VSLENGTH:
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break;
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default:
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printf("<subtype %d>", subtype);
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}
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break;
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case CTLENDVAR:
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putc('}', fp);
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break;
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case CTLBACKQ:
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case CTLBACKQ|CTLQUOTE:
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putc('$', fp);
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putc('(', fp);
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shtree(bqlist->n, -1, NULL, fp);
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putc(')', fp);
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break;
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default:
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putc(*p, fp);
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break;
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}
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}
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}
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static void
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indent(amount, pfx, fp)
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int amount;
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char *pfx;
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FILE *fp;
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{
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int i;
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for (i = 0 ; i < amount ; i++) {
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if (pfx && i == amount - 1)
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fputs(pfx, fp);
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putc('\t', fp);
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}
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}
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#endif
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/*
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* Debugging stuff.
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*/
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FILE *tracefile;
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#if DEBUG == 2
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int debug = 1;
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#else
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int debug = 0;
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#endif
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void
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trputc(c)
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int c;
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{
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#ifdef DEBUG
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if (tracefile == NULL)
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return;
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putc(c, tracefile);
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if (c == '\n')
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fflush(tracefile);
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#endif
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}
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void
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#if __STDC__
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shtrace(const char *fmt, ...)
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#else
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shtrace(va_alist)
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va_dcl
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#endif
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{
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#ifdef DEBUG
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va_list va;
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#if __STDC__
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va_start(va, fmt);
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#else
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char *fmt;
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va_start(va);
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fmt = va_arg(va, char *);
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#endif
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if (tracefile != NULL) {
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(void) vfprintf(tracefile, fmt, va);
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if (strchr(fmt, '\n'))
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(void) fflush(tracefile);
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}
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va_end(va);
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#endif
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}
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void
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trputs(s)
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char *s;
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{
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#ifdef DEBUG
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if (tracefile == NULL)
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return;
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fputs(s, tracefile);
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if (strchr(s, '\n'))
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fflush(tracefile);
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#endif
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}
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static void
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trstring(s)
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char *s;
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{
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register char *p;
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char c;
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#ifdef DEBUG
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if (tracefile == NULL)
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return;
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putc('"', tracefile);
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for (p = s ; *p ; p++) {
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switch (*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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putc(c, tracefile);
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break;
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default:
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if (*p >= ' ' && *p <= '~')
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putc(*p, tracefile);
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else {
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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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}
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break;
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}
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}
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putc('"', tracefile);
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#endif
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}
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void
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trargs(ap)
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char **ap;
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{
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#ifdef DEBUG
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if (tracefile == NULL)
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return;
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while (*ap) {
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trstring(*ap++);
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if (*ap)
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putc(' ', tracefile);
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else
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putc('\n', tracefile);
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}
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fflush(tracefile);
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#endif
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}
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void
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opentrace() {
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char s[100];
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char *getenv();
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#ifdef O_APPEND
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int flags;
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#endif
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#ifdef DEBUG
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if (!debug)
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return;
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#ifdef not_this_way
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{
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char *p;
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if ((p = getenv("HOME")) == NULL) {
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if (geteuid() == 0)
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p = "/";
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else
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p = "/tmp";
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}
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scopy(p, s);
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strcat(s, "/trace");
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}
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#else
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scopy("./trace", s);
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#endif /* not_this_way */
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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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return;
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}
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#ifdef O_APPEND
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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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#endif
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fputs("\nTracing started.\n", tracefile);
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fflush(tracefile);
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#endif /* DEBUG */
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}
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