| 1 | /* $NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | */
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| 34 |
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| 35 | #ifdef HAVE_SYS_CDEFS_H
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| 36 | #include <sys/cdefs.h>
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| 37 | #endif
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| 38 | #ifndef lint
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| 39 | #if 0
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| 40 | static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95";
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| 41 | #else
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| 42 | __RCSID("$NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $");
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| 43 | #endif
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| 44 | #endif /* not lint */
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| 45 |
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| 46 | #include <stdio.h>
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| 47 | #include <stdarg.h>
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| 48 | #include <stdlib.h>
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| 49 | #include <sys/fcntl.h>
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| 50 | #include <unistd.h>
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| 51 |
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| 52 | #include "shell.h"
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| 53 | #include "parser.h"
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| 54 | #include "nodes.h"
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| 55 | #include "mystring.h"
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| 56 | #include "show.h"
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| 57 | #include "options.h"
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| 58 |
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| 59 |
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| 60 | #ifdef DEBUG
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| 61 | static void shtree(union node *, int, char *, FILE*);
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| 62 | static void shcmd(union node *, FILE *);
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| 63 | static void sharg(union node *, FILE *);
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| 64 | static void indent(int, char *, FILE *);
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| 65 | static void trstring(char *);
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| 66 |
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| 67 |
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| 68 | void
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| 69 | showtree(union node *n)
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| 70 | {
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| 71 | trputs("showtree called\n");
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| 72 | shtree(n, 1, NULL, stdout);
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| 73 | }
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| 74 |
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| 75 |
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| 76 | static void
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| 77 | shtree(union node *n, int ind, char *pfx, FILE *fp)
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| 78 | {
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| 79 | struct nodelist *lp;
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| 80 | const char *s;
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| 81 |
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| 82 | if (n == NULL)
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| 83 | return;
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| 84 |
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| 85 | indent(ind, pfx, fp);
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| 86 | switch(n->type) {
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| 87 | case NSEMI:
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| 88 | s = "; ";
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| 89 | goto binop;
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| 90 | case NAND:
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| 91 | s = " && ";
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| 92 | goto binop;
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| 93 | case NOR:
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| 94 | s = " || ";
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| 95 | binop:
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| 96 | shtree(n->nbinary.ch1, ind, NULL, fp);
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| 97 | /* if (ind < 0) */
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| 98 | fputs(s, fp);
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| 99 | shtree(n->nbinary.ch2, ind, NULL, fp);
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| 100 | break;
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| 101 | case NCMD:
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| 102 | shcmd(n, fp);
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| 103 | if (ind >= 0)
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| 104 | putc('\n', fp);
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| 105 | break;
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| 106 | case NPIPE:
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| 107 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
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| 108 | shcmd(lp->n, fp);
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| 109 | if (lp->next)
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| 110 | fputs(" | ", fp);
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| 111 | }
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| 112 | if (n->npipe.backgnd)
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| 113 | fputs(" &", fp);
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| 114 | if (ind >= 0)
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| 115 | putc('\n', fp);
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| 116 | break;
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| 117 | default:
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| 118 | fprintf(fp, "<node type %d>", n->type);
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| 119 | if (ind >= 0)
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| 120 | putc('\n', fp);
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| 121 | break;
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| 122 | }
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| 123 | }
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| 124 |
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| 125 |
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| 126 |
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| 127 | static void
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| 128 | shcmd(union node *cmd, FILE *fp)
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| 129 | {
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| 130 | union node *np;
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| 131 | int first;
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| 132 | const char *s;
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| 133 | int dftfd;
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| 134 |
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| 135 | first = 1;
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| 136 | for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
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| 137 | if (! first)
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| 138 | putchar(' ');
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| 139 | sharg(np, fp);
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| 140 | first = 0;
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| 141 | }
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| 142 | for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
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| 143 | if (! first)
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| 144 | putchar(' ');
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| 145 | switch (np->nfile.type) {
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| 146 | case NTO: s = ">"; dftfd = 1; break;
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| 147 | case NCLOBBER: s = ">|"; dftfd = 1; break;
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| 148 | case NAPPEND: s = ">>"; dftfd = 1; break;
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| 149 | case NTOFD: s = ">&"; dftfd = 1; break;
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| 150 | case NFROM: s = "<"; dftfd = 0; break;
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| 151 | case NFROMFD: s = "<&"; dftfd = 0; break;
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| 152 | case NFROMTO: s = "<>"; dftfd = 0; break;
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| 153 | default: s = "*error*"; dftfd = 0; break;
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| 154 | }
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| 155 | if (np->nfile.fd != dftfd)
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| 156 | fprintf(fp, "%d", np->nfile.fd);
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| 157 | fputs(s, fp);
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| 158 | if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
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| 159 | fprintf(fp, "%d", np->ndup.dupfd);
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| 160 | } else {
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| 161 | sharg(np->nfile.fname, fp);
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| 162 | }
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| 163 | first = 0;
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| 164 | }
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| 165 | }
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| 166 |
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| 167 |
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| 168 |
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| 169 | static void
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| 170 | sharg(union node *arg, FILE *fp)
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| 171 | {
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| 172 | char *p;
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| 173 | struct nodelist *bqlist;
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| 174 | int subtype;
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| 175 |
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| 176 | if (arg->type != NARG) {
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| 177 | printf("<node type %d>\n", arg->type);
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| 178 | abort();
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| 179 | }
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| 180 | bqlist = arg->narg.backquote;
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| 181 | for (p = arg->narg.text ; *p ; p++) {
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| 182 | switch (*p) {
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| 183 | case CTLESC:
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| 184 | putc(*++p, fp);
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| 185 | break;
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| 186 | case CTLVAR:
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| 187 | putc('$', fp);
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| 188 | putc('{', fp);
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| 189 | subtype = *++p;
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| 190 | if (subtype == VSLENGTH)
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| 191 | putc('#', fp);
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| 192 |
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| 193 | while (*p != '=')
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| 194 | putc(*p++, fp);
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| 195 |
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| 196 | if (subtype & VSNUL)
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| 197 | putc(':', fp);
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| 198 |
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| 199 | switch (subtype & VSTYPE) {
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| 200 | case VSNORMAL:
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| 201 | putc('}', fp);
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| 202 | break;
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| 203 | case VSMINUS:
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| 204 | putc('-', fp);
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| 205 | break;
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| 206 | case VSPLUS:
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| 207 | putc('+', fp);
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| 208 | break;
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| 209 | case VSQUESTION:
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| 210 | putc('?', fp);
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| 211 | break;
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| 212 | case VSASSIGN:
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| 213 | putc('=', fp);
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| 214 | break;
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| 215 | case VSTRIMLEFT:
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| 216 | putc('#', fp);
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| 217 | break;
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| 218 | case VSTRIMLEFTMAX:
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| 219 | putc('#', fp);
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| 220 | putc('#', fp);
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| 221 | break;
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| 222 | case VSTRIMRIGHT:
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| 223 | putc('%', fp);
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| 224 | break;
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| 225 | case VSTRIMRIGHTMAX:
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| 226 | putc('%', fp);
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| 227 | putc('%', fp);
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| 228 | break;
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| 229 | case VSLENGTH:
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| 230 | break;
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| 231 | default:
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| 232 | printf("<subtype %d>", subtype);
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| 233 | }
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| 234 | break;
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| 235 | case CTLENDVAR:
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| 236 | putc('}', fp);
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| 237 | break;
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| 238 | case CTLBACKQ:
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| 239 | case CTLBACKQ|CTLQUOTE:
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| 240 | putc('$', fp);
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| 241 | putc('(', fp);
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| 242 | shtree(bqlist->n, -1, NULL, fp);
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| 243 | putc(')', fp);
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| 244 | break;
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| 245 | default:
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| 246 | putc(*p, fp);
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| 247 | break;
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| 248 | }
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| 249 | }
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| 250 | }
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| 251 |
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| 252 |
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| 253 | static void
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| 254 | indent(int amount, char *pfx, FILE *fp)
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| 255 | {
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| 256 | int i;
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| 257 |
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| 258 | for (i = 0 ; i < amount ; i++) {
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| 259 | if (pfx && i == amount - 1)
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| 260 | fputs(pfx, fp);
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| 261 | putc('\t', fp);
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| 262 | }
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| 263 | }
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| 264 | #endif
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| 265 |
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| 266 |
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| 267 |
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| 268 | /*
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| 269 | * Debugging stuff.
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| 270 | */
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| 271 |
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| 272 |
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| 273 | FILE *tracefile;
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| 274 |
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| 275 |
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| 276 | #ifdef DEBUG
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| 277 | void
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| 278 | trputc(int c)
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| 279 | {
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| 280 | if (debug != 1)
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| 281 | return;
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| 282 | putc(c, tracefile);
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| 283 | }
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| 284 | #endif
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| 285 |
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| 286 | void
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| 287 | trace(const char *fmt, ...)
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| 288 | {
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| 289 | #ifdef DEBUG
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| 290 | va_list va;
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| 291 |
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| 292 | if (debug != 1)
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| 293 | return;
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| 294 | fprintf(tracefile, "[%d] ", getpid());
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| 295 | va_start(va, fmt);
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| 296 | (void) vfprintf(tracefile, fmt, va);
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| 297 | va_end(va);
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| 298 | #endif
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| 299 | }
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| 300 |
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| 301 | void
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| 302 | tracev(const char *fmt, va_list va)
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| 303 | {
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| 304 | #ifdef DEBUG
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| 305 | if (debug != 1)
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| 306 | return;
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| 307 | fprintf(tracefile, "[%d] ", getpid());
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| 308 | (void) vfprintf(tracefile, fmt, va);
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| 309 | #endif
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| 310 | }
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| 311 |
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| 312 |
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| 313 | #ifdef DEBUG
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| 314 | void
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| 315 | trputs(const char *s)
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| 316 | {
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| 317 | if (debug != 1)
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| 318 | return;
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| 319 | fputs(s, tracefile);
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| 320 | }
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| 321 |
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| 322 |
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| 323 | static void
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| 324 | trstring(char *s)
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| 325 | {
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| 326 | char *p;
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| 327 | char c;
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| 328 |
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| 329 | if (debug != 1)
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| 330 | return;
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| 331 | putc('"', tracefile);
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| 332 | for (p = s ; *p ; p++) {
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| 333 | switch (*p) {
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| 334 | case '\n': c = 'n'; goto backslash;
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| 335 | case '\t': c = 't'; goto backslash;
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| 336 | case '\r': c = 'r'; goto backslash;
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| 337 | case '"': c = '"'; goto backslash;
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| 338 | case '\\': c = '\\'; goto backslash;
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| 339 | case CTLESC: c = 'e'; goto backslash;
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| 340 | case CTLVAR: c = 'v'; goto backslash;
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| 341 | case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
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| 342 | case CTLBACKQ: c = 'q'; goto backslash;
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| 343 | case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
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| 344 | backslash: putc('\\', tracefile);
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| 345 | putc(c, tracefile);
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| 346 | break;
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| 347 | default:
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| 348 | if (*p >= ' ' && *p <= '~')
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| 349 | putc(*p, tracefile);
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| 350 | else {
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| 351 | putc('\\', tracefile);
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| 352 | putc(*p >> 6 & 03, tracefile);
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| 353 | putc(*p >> 3 & 07, tracefile);
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| 354 | putc(*p & 07, tracefile);
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| 355 | }
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| 356 | break;
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| 357 | }
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| 358 | }
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| 359 | putc('"', tracefile);
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| 360 | }
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| 361 | #endif
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| 362 |
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| 363 |
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| 364 | void
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| 365 | trargs(char **ap)
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| 366 | {
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| 367 | #ifdef DEBUG
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| 368 | if (debug != 1)
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| 369 | return;
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| 370 | while (*ap) {
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| 371 | trstring(*ap++);
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| 372 | if (*ap)
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| 373 | putc(' ', tracefile);
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| 374 | else
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| 375 | putc('\n', tracefile);
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| 376 | }
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| 377 | #endif
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| 378 | }
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| 379 |
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| 380 |
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| 381 | #ifdef DEBUG
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| 382 | void
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| 383 | opentrace(void)
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| 384 | {
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| 385 | char s[100];
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| 386 | #ifdef O_APPEND
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| 387 | int flags;
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| 388 | #endif
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| 389 | #if 1
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| 390 | int fd;
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| 391 | #endif
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| 392 |
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| 393 | if (debug != 1) {
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| 394 | if (tracefile)
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| 395 | fflush(tracefile);
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| 396 | /* leave open because libedit might be using it */
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| 397 | return;
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| 398 | }
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| 399 | #ifdef not_this_way
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| 400 | {
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| 401 | char *p;
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| 402 | if ((p = getenv("HOME")) == NULL) {
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| 403 | if (geteuid() == 0)
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| 404 | p = "/";
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| 405 | else
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| 406 | p = "/tmp";
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| 407 | }
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| 408 | scopy(p, s);
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| 409 | strcat(s, "/trace");
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| 410 | }
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| 411 | #else
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| 412 | scopy("./trace", s);
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| 413 | #endif /* not_this_way */
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| 414 | if (tracefile) {
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| 415 | if (!freopen(s, "a", tracefile)) {
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| 416 | fprintf(stderr, "Can't re-open %s\n", s);
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| 417 | debug = 0;
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| 418 | return;
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| 419 | }
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| 420 | trace("opentrace: fno=%d - freopen\n", fileno(tracefile));
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| 421 | } else {
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| 422 | #if 0
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| 423 | if ((tracefile = fopen(s, "a")) == NULL) {
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| 424 | #else
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| 425 | fd = open(s, O_APPEND | O_RDWR | O_CREAT, 0600);
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| 426 | if (fd != -1) {
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| 427 | int fd2 = fcntl(fd, F_DUPFD, 199);
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| 428 | if (fd2 == -1)
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| 429 | fd2 = fcntl(fd, F_DUPFD, 99);
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| 430 | if (fd2 == -1)
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| 431 | fd2 = fcntl(fd, F_DUPFD, 49);
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| 432 | if (fd2 == -1)
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| 433 | fd2 = fcntl(fd, F_DUPFD, 18);
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|---|
| 434 | if (fd2 == -1)
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|---|
| 435 | fd2 = fcntl(fd, F_DUPFD, 10);
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|---|
| 436 | if (fd2 != -1) {
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| 437 | close(fd);
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|---|
| 438 | fd = fd2;
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|---|
| 439 | }
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|---|
| 440 | }
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|---|
| 441 | if (fd == -1 || (tracefile = fdopen(fd, "a")) == NULL) {
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|---|
| 442 | #endif
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|---|
| 443 | fprintf(stderr, "Can't open %s\n", s);
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|---|
| 444 | debug = 0;
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|---|
| 445 | return;
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|---|
| 446 | }
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|---|
| 447 | trace("opentrace: fno=%d\n", fileno(tracefile));
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|---|
| 448 | }
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| 449 | #ifdef O_APPEND
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| 450 | if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
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| 451 | fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
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| 452 | #endif
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| 453 | setlinebuf(tracefile);
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| 454 | fputs("\nTracing started.\n", tracefile);
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| 455 | }
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| 456 | #endif /* DEBUG */
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