| 1 | /*-
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| 2 | * Copyright (c) 1991 The Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Kenneth Almquist.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. All advertising materials mentioning features or use of this software
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| 17 | * must display the following acknowledgement:
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| 18 | * This product includes software developed by the University of
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| 19 | * California, Berkeley and its contributors.
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| 20 | * 4. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | */
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| 36 |
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| 37 | #ifndef lint
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| 38 | static char sccsid[] = "@(#)show.c 5.2 (Berkeley) 4/12/91";
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| 39 | #endif /* not lint */
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| 40 |
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| 41 | #include <stdio.h>
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| 42 | #include <errno.h>
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| 43 | #include "shell.h"
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| 44 | #include "parser.h"
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| 45 | #include "nodes.h"
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| 46 | #include "mystring.h"
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| 47 |
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| 48 |
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| 49 | #if DEBUG
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| 50 | static shtree(), shcmd(), sharg(), indent();
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| 51 |
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| 52 |
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| 53 | showtree(n)
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| 54 | union node *n;
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| 55 | {
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| 56 | trputs("showtree called\n");
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| 57 | shtree(n, 1, NULL, stdout);
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| 58 | }
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| 59 |
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| 60 |
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| 61 | static
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| 62 | shtree(n, ind, pfx, fp)
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| 63 | union node *n;
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| 64 | char *pfx;
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| 65 | FILE *fp;
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| 66 | {
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| 67 | struct nodelist *lp;
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| 68 | char *s;
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| 69 |
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| 70 | indent(ind, pfx, fp);
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| 71 | switch(n->type) {
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| 72 | case NSEMI:
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| 73 | s = "; ";
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| 74 | goto binop;
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| 75 | case NAND:
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| 76 | s = " && ";
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| 77 | goto binop;
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| 78 | case NOR:
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| 79 | s = " || ";
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| 80 | binop:
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| 81 | shtree(n->nbinary.ch1, ind, NULL, fp);
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| 82 | /* if (ind < 0) */
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| 83 | fputs(s, fp);
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| 84 | shtree(n->nbinary.ch2, ind, NULL, fp);
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| 85 | break;
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| 86 | case NCMD:
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| 87 | shcmd(n, fp);
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| 88 | if (ind >= 0)
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| 89 | putc('\n', fp);
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| 90 | break;
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| 91 | case NPIPE:
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| 92 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
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| 93 | shcmd(lp->n, fp);
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| 94 | if (lp->next)
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| 95 | fputs(" | ", fp);
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| 96 | }
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| 97 | if (n->npipe.backgnd)
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| 98 | fputs(" &", fp);
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| 99 | if (ind >= 0)
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| 100 | putc('\n', fp);
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| 101 | break;
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| 102 | default:
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| 103 | fprintf(fp, "<node type %d>", n->type);
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| 104 | if (ind >= 0)
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| 105 | putc('\n', fp);
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| 106 | break;
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| 107 | }
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| 108 | }
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| 109 |
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| 110 |
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| 111 |
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| 112 | static
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| 113 | shcmd(cmd, fp)
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| 114 | union node *cmd;
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| 115 | FILE *fp;
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| 116 | {
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| 117 | union node *np;
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| 118 | int first;
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| 119 | char *s;
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| 120 | int dftfd;
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| 121 |
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| 122 | first = 1;
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| 123 | for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
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| 124 | if (! first)
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| 125 | putchar(' ');
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| 126 | sharg(np, fp);
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| 127 | first = 0;
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| 128 | }
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| 129 | for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
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| 130 | if (! first)
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| 131 | putchar(' ');
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| 132 | switch (np->nfile.type) {
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| 133 | case NTO: s = ">"; dftfd = 1; break;
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| 134 | case NAPPEND: s = ">>"; dftfd = 1; break;
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| 135 | case NTOFD: s = ">&"; dftfd = 1; break;
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| 136 | case NFROM: s = "<"; dftfd = 0; break;
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| 137 | case NFROMFD: s = "<&"; dftfd = 0; break;
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| 138 | }
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| 139 | if (np->nfile.fd != dftfd)
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| 140 | fprintf(fp, "%d", np->nfile.fd);
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| 141 | fputs(s, fp);
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| 142 | if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
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| 143 | fprintf(fp, "%d", np->ndup.dupfd);
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| 144 | } else {
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| 145 | sharg(np->nfile.fname, fp);
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| 146 | }
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| 147 | first = 0;
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| 148 | }
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| 149 | }
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| 150 |
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| 151 |
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| 152 |
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| 153 | static
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| 154 | sharg(arg, fp)
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| 155 | union node *arg;
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| 156 | FILE *fp;
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| 157 | {
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| 158 | char *p;
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| 159 | struct nodelist *bqlist;
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| 160 | int subtype;
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| 161 |
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| 162 | if (arg->type != NARG) {
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| 163 | printf("<node type %d>\n", arg->type);
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| 164 | fflush(stdout);
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| 165 | abort();
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| 166 | }
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| 167 | bqlist = arg->narg.backquote;
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| 168 | for (p = arg->narg.text ; *p ; p++) {
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| 169 | switch (*p) {
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| 170 | case CTLESC:
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| 171 | putc(*++p, fp);
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| 172 | break;
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| 173 | case CTLVAR:
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| 174 | putc('$', fp);
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| 175 | putc('{', fp);
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| 176 | subtype = *++p;
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| 177 | while (*p != '=')
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| 178 | putc(*p++, fp);
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| 179 | if (subtype & VSNUL)
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| 180 | putc(':', fp);
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| 181 | switch (subtype & VSTYPE) {
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| 182 | case VSNORMAL:
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| 183 | putc('}', fp);
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| 184 | break;
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| 185 | case VSMINUS:
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| 186 | putc('-', fp);
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| 187 | break;
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| 188 | case VSPLUS:
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| 189 | putc('+', fp);
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| 190 | break;
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| 191 | case VSQUESTION:
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| 192 | putc('?', fp);
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| 193 | break;
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| 194 | case VSASSIGN:
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| 195 | putc('=', fp);
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| 196 | break;
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| 197 | default:
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| 198 | printf("<subtype %d>", subtype);
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| 199 | }
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| 200 | break;
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| 201 | case CTLENDVAR:
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| 202 | putc('}', fp);
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| 203 | break;
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| 204 | case CTLBACKQ:
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| 205 | case CTLBACKQ|CTLQUOTE:
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| 206 | putc('$', fp);
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| 207 | putc('(', fp);
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| 208 | shtree(bqlist->n, -1, NULL, fp);
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| 209 | putc(')', fp);
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| 210 | break;
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| 211 | default:
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| 212 | putc(*p, fp);
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| 213 | break;
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| 214 | }
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| 215 | }
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| 216 | }
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| 217 |
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| 218 |
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| 219 | static
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| 220 | indent(amount, pfx, fp)
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| 221 | char *pfx;
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| 222 | FILE *fp;
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| 223 | {
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| 224 | int i;
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| 225 |
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| 226 | for (i = 0 ; i < amount ; i++) {
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| 227 | if (pfx && i == amount - 1)
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| 228 | fputs(pfx, fp);
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| 229 | putc('\t', fp);
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| 230 | }
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| 231 | }
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| 232 | #endif
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| 233 |
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| 234 |
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| 235 |
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| 236 | /*
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| 237 | * Debugging stuff.
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| 238 | */
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| 239 |
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| 240 |
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| 241 | FILE *tracefile;
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| 242 |
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| 243 | #if DEBUG == 2
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| 244 | int debug = 1;
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| 245 | #else
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| 246 | int debug = 0;
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| 247 | #endif
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| 248 |
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| 249 |
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| 250 | trputc(c) {
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| 251 | #if DEBUG
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| 252 | if (tracefile == NULL)
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| 253 | return;
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| 254 | putc(c, tracefile);
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| 255 | if (c == '\n')
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| 256 | fflush(tracefile);
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| 257 | #endif
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| 258 | }
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| 259 |
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| 260 |
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| 261 | trace(fmt, a1, a2, a3, a4, a5, a6, a7, a8)
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| 262 | char *fmt;
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| 263 | {
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| 264 | #if DEBUG
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| 265 | int e = errno;
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| 266 | if (tracefile == NULL)
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| 267 | return;
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| 268 | fprintf(tracefile, fmt, a1, a2, a3, a4, a5, a6, a7, a8);
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| 269 | if (strchr(fmt, '\n'))
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| 270 | fflush(tracefile);
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| 271 | errno = e;
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| 272 | #endif
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| 273 | }
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| 274 |
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| 275 |
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| 276 | trputs(s)
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| 277 | char *s;
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| 278 | {
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| 279 | #if DEBUG
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| 280 | if (tracefile == NULL)
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| 281 | return;
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| 282 | fputs(s, tracefile);
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| 283 | if (strchr(s, '\n'))
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| 284 | fflush(tracefile);
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| 285 | #endif
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| 286 | }
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| 287 |
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| 288 |
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| 289 | trstring(s)
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| 290 | char *s;
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| 291 | {
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| 292 | register char *p;
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| 293 | char c;
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| 294 |
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| 295 | #if DEBUG
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| 296 | if (tracefile == NULL)
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| 297 | return;
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| 298 | putc('"', tracefile);
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| 299 | for (p = s ; *p ; p++) {
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| 300 | switch (*p) {
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| 301 | case '\n': c = 'n'; goto backslash;
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| 302 | case '\t': c = 't'; goto backslash;
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| 303 | case '\r': c = 'r'; goto backslash;
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| 304 | case '"': c = '"'; goto backslash;
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| 305 | case '\\': c = '\\'; goto backslash;
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| 306 | case CTLESC: c = 'e'; goto backslash;
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| 307 | case CTLVAR: c = 'v'; goto backslash;
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| 308 | case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
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| 309 | case CTLBACKQ: c = 'q'; goto backslash;
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| 310 | case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
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| 311 | backslash: putc('\\', tracefile);
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| 312 | putc(c, tracefile);
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| 313 | break;
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| 314 | default:
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| 315 | if (*p >= ' ' && *p <= '~')
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| 316 | putc(*p, tracefile);
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| 317 | else {
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| 318 | putc('\\', tracefile);
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| 319 | putc(*p >> 6 & 03, tracefile);
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| 320 | putc(*p >> 3 & 07, tracefile);
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| 321 | putc(*p & 07, tracefile);
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| 322 | }
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| 323 | break;
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| 324 | }
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| 325 | }
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| 326 | putc('"', tracefile);
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| 327 | #endif
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| 328 | }
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| 329 |
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| 330 |
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| 331 | trargs(ap)
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| 332 | char **ap;
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| 333 | {
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| 334 | #if DEBUG
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| 335 | if (tracefile == NULL)
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| 336 | return;
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| 337 | while (*ap) {
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| 338 | trstring(*ap++);
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| 339 | if (*ap)
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| 340 | putc(' ', tracefile);
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| 341 | else
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| 342 | putc('\n', tracefile);
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| 343 | }
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| 344 | fflush(tracefile);
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| 345 | #endif
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| 346 | }
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| 347 |
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| 348 |
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| 349 | opentrace() {
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| 350 | char s[100];
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| 351 | char *p;
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| 352 | char *getenv();
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| 353 | int flags;
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| 354 |
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| 355 | #if DEBUG
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| 356 | if (!debug)
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| 357 | return;
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| 358 | if ((p = getenv("HOME")) == NULL) {
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| 359 | if (getuid() == 0)
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| 360 | p = "/";
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| 361 | else
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| 362 | p = "/tmp";
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| 363 | }
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| 364 | scopy(p, s);
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| 365 | strcat(s, "/trace");
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| 366 | if ((tracefile = fopen(s, "a")) == NULL) {
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| 367 | fprintf(stderr, "Can't open %s\n", s);
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| 368 | return;
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| 369 | }
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| 370 | #ifdef O_APPEND
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| 371 | if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
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| 372 | fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
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| 373 | #endif
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| 374 | fputs("\nTracing started.\n", tracefile);
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| 375 | fflush(tracefile);
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| 376 | #endif
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| 377 | }
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