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2714 | cejka | 1 | /* $NetBSD: show.c,v 1.18 1999/10/08 21:10:44 pk Exp $ */ |
2 | |||
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. All advertising materials mentioning features or use of this software |
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19 | * must display the following acknowledgement: |
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20 | * This product includes software developed by the University of |
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21 | * California, Berkeley and its contributors. |
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22 | * 4. Neither the name of the University nor the names of its contributors |
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23 | * may be used to endorse or promote products derived from this software |
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24 | * without specific prior written permission. |
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25 | * |
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26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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36 | * SUCH DAMAGE. |
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37 | */ |
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38 | |||
39 | #include <sys/cdefs.h> |
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40 | #ifndef lint |
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41 | #if 0 |
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42 | static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95"; |
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43 | #else |
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44 | __RCSID("$NetBSD: show.c,v 1.18 1999/10/08 21:10:44 pk Exp $"); |
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45 | #endif |
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46 | #endif /* not lint */ |
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47 | |||
48 | #include <stdio.h> |
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49 | #ifdef __STDC__ |
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50 | #include <stdarg.h> |
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51 | #else |
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52 | #include <varargs.h> |
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53 | #endif |
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54 | |||
55 | #include "shell.h" |
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56 | #include "parser.h" |
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57 | #include "nodes.h" |
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58 | #include "mystring.h" |
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59 | #include "show.h" |
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60 | |||
61 | |||
62 | #ifdef DEBUG |
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63 | static void shtree (union node *, int, char *, FILE*); |
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64 | static void shcmd (union node *, FILE *); |
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65 | static void sharg (union node *, FILE *); |
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66 | static void indent (int, char *, FILE *); |
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67 | static void trstring (char *); |
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68 | |||
69 | |||
70 | void |
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71 | showtree(n) |
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72 | union node *n; |
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73 | { |
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74 | trputs("showtree called\n"); |
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75 | shtree(n, 1, NULL, stdout); |
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76 | } |
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77 | |||
78 | |||
79 | static void |
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80 | shtree(n, ind, pfx, fp) |
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81 | union node *n; |
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82 | int ind; |
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83 | char *pfx; |
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84 | FILE *fp; |
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85 | { |
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86 | struct nodelist *lp; |
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87 | const char *s; |
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88 | |||
89 | if (n == NULL) |
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90 | return; |
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91 | |||
92 | indent(ind, pfx, fp); |
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93 | switch(n->type) { |
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94 | case NSEMI: |
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95 | s = "; "; |
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96 | goto binop; |
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97 | case NAND: |
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98 | s = " && "; |
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99 | goto binop; |
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100 | case NOR: |
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101 | s = " || "; |
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102 | binop: |
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103 | shtree(n->nbinary.ch1, ind, NULL, fp); |
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104 | /* if (ind < 0) */ |
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105 | fputs(s, fp); |
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106 | shtree(n->nbinary.ch2, ind, NULL, fp); |
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107 | break; |
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108 | case NCMD: |
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109 | shcmd(n, fp); |
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110 | if (ind >= 0) |
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111 | putc('\n', fp); |
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112 | break; |
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113 | case NPIPE: |
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114 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { |
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115 | shcmd(lp->n, fp); |
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116 | if (lp->next) |
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117 | fputs(" | ", fp); |
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118 | } |
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119 | if (n->npipe.backgnd) |
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120 | fputs(" &", fp); |
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121 | if (ind >= 0) |
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122 | putc('\n', fp); |
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123 | break; |
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124 | default: |
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125 | fprintf(fp, "<node type %d>", n->type); |
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126 | if (ind >= 0) |
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127 | putc('\n', fp); |
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128 | break; |
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129 | } |
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130 | } |
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131 | |||
132 | |||
133 | |||
134 | static void |
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135 | shcmd(cmd, fp) |
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136 | union node *cmd; |
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137 | FILE *fp; |
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138 | { |
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139 | union node *np; |
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140 | int first; |
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141 | const char *s; |
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142 | int dftfd; |
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143 | |||
144 | first = 1; |
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145 | for (np = cmd->ncmd.args ; np ; np = np->narg.next) { |
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146 | if (! first) |
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147 | putchar(' '); |
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148 | sharg(np, fp); |
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149 | first = 0; |
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150 | } |
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151 | for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) { |
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152 | if (! first) |
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153 | putchar(' '); |
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154 | switch (np->nfile.type) { |
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155 | case NTO: s = ">"; dftfd = 1; break; |
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156 | case NAPPEND: s = ">>"; dftfd = 1; break; |
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157 | case NTOFD: s = ">&"; dftfd = 1; break; |
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158 | case NTOOV: s = ">|"; dftfd = 1; break; |
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159 | case NFROM: s = "<"; dftfd = 0; break; |
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160 | case NFROMFD: s = "<&"; dftfd = 0; break; |
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161 | case NFROMTO: s = "<>"; dftfd = 0; break; |
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162 | default: s = "*error*"; dftfd = 0; break; |
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163 | } |
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164 | if (np->nfile.fd != dftfd) |
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165 | fprintf(fp, "%d", np->nfile.fd); |
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166 | fputs(s, fp); |
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167 | if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) { |
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168 | fprintf(fp, "%d", np->ndup.dupfd); |
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169 | } else { |
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170 | sharg(np->nfile.fname, fp); |
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171 | } |
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172 | first = 0; |
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173 | } |
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174 | } |
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175 | |||
176 | |||
177 | |||
178 | static void |
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179 | sharg(arg, fp) |
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180 | union node *arg; |
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181 | FILE *fp; |
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182 | { |
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183 | char *p; |
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184 | struct nodelist *bqlist; |
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185 | int subtype; |
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186 | |||
187 | if (arg->type != NARG) { |
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188 | printf("<node type %d>\n", arg->type); |
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189 | fflush(stdout); |
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190 | abort(); |
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191 | } |
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192 | bqlist = arg->narg.backquote; |
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193 | for (p = arg->narg.text ; *p ; p++) { |
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194 | switch (*p) { |
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195 | case CTLESC: |
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196 | putc(*++p, fp); |
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197 | break; |
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198 | case CTLVAR: |
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199 | putc('$', fp); |
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200 | putc('{', fp); |
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201 | subtype = *++p; |
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202 | if (subtype == VSLENGTH) |
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203 | putc('#', fp); |
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204 | |||
205 | while (*p != '=') |
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206 | putc(*p++, fp); |
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207 | |||
208 | if (subtype & VSNUL) |
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209 | putc(':', fp); |
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210 | |||
211 | switch (subtype & VSTYPE) { |
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212 | case VSNORMAL: |
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213 | putc('}', fp); |
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214 | break; |
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215 | case VSMINUS: |
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216 | putc('-', fp); |
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217 | break; |
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218 | case VSPLUS: |
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219 | putc('+', fp); |
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220 | break; |
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221 | case VSQUESTION: |
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222 | putc('?', fp); |
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223 | break; |
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224 | case VSASSIGN: |
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225 | putc('=', fp); |
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226 | break; |
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227 | case VSTRIMLEFT: |
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228 | putc('#', fp); |
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229 | break; |
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230 | case VSTRIMLEFTMAX: |
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231 | putc('#', fp); |
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232 | putc('#', fp); |
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233 | break; |
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234 | case VSTRIMRIGHT: |
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235 | putc('%', fp); |
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236 | break; |
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237 | case VSTRIMRIGHTMAX: |
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238 | putc('%', fp); |
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239 | putc('%', fp); |
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240 | break; |
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241 | case VSLENGTH: |
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242 | break; |
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243 | default: |
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244 | printf("<subtype %d>", subtype); |
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245 | } |
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246 | break; |
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247 | case CTLENDVAR: |
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248 | putc('}', fp); |
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249 | break; |
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250 | case CTLBACKQ: |
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251 | case CTLBACKQ|CTLQUOTE: |
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252 | putc('$', fp); |
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253 | putc('(', fp); |
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254 | shtree(bqlist->n, -1, NULL, fp); |
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255 | putc(')', fp); |
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256 | break; |
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257 | default: |
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258 | putc(*p, fp); |
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259 | break; |
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260 | } |
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261 | } |
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262 | } |
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263 | |||
264 | |||
265 | static void |
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266 | indent(amount, pfx, fp) |
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267 | int amount; |
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268 | char *pfx; |
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269 | FILE *fp; |
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270 | { |
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271 | int i; |
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272 | |||
273 | for (i = 0 ; i < amount ; i++) { |
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274 | if (pfx && i == amount - 1) |
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275 | fputs(pfx, fp); |
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276 | putc('\t', fp); |
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277 | } |
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278 | } |
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279 | #endif |
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280 | |||
281 | |||
282 | |||
283 | /* |
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284 | * Debugging stuff. |
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285 | */ |
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286 | |||
287 | |||
288 | FILE *tracefile; |
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289 | |||
290 | #if DEBUG == 2 |
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291 | int debug = 1; |
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292 | #else |
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293 | int debug = 0; |
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294 | #endif |
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295 | |||
296 | |||
297 | #ifdef DEBUG |
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298 | void |
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299 | trputc(c) |
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300 | int c; |
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301 | { |
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302 | if (tracefile == NULL) |
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303 | return; |
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304 | putc(c, tracefile); |
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305 | if (c == '\n') |
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306 | fflush(tracefile); |
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307 | } |
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308 | #endif |
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309 | |||
310 | void |
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311 | #ifdef __STDC__ |
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312 | trace(const char *fmt, ...) |
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313 | #else |
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314 | trace(va_alist) |
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315 | va_dcl |
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316 | #endif |
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317 | { |
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318 | #ifdef DEBUG |
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319 | va_list va; |
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320 | #ifdef __STDC__ |
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321 | va_start(va, fmt); |
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322 | #else |
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323 | char *fmt; |
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324 | va_start(va); |
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325 | fmt = va_arg(va, char *); |
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326 | #endif |
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327 | if (tracefile != NULL) { |
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328 | (void) vfprintf(tracefile, fmt, va); |
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329 | if (strchr(fmt, '\n')) |
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330 | (void) fflush(tracefile); |
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331 | } |
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332 | va_end(va); |
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333 | #endif |
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334 | } |
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335 | |||
336 | |||
337 | #ifdef DEBUG |
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338 | void |
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339 | trputs(s) |
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340 | const char *s; |
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341 | { |
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342 | if (tracefile == NULL) |
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343 | return; |
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344 | fputs(s, tracefile); |
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345 | if (strchr(s, '\n')) |
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346 | fflush(tracefile); |
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347 | } |
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348 | |||
349 | |||
350 | static void |
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351 | trstring(s) |
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352 | char *s; |
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353 | { |
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354 | char *p; |
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355 | char c; |
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356 | |||
357 | if (tracefile == NULL) |
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358 | return; |
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359 | putc('"', tracefile); |
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360 | for (p = s ; *p ; p++) { |
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361 | switch (*p) { |
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362 | case '\n': c = 'n'; goto backslash; |
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363 | case '\t': c = 't'; goto backslash; |
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364 | case '\r': c = 'r'; goto backslash; |
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365 | case '"': c = '"'; goto backslash; |
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366 | case '\\': c = '\\'; goto backslash; |
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367 | case CTLESC: c = 'e'; goto backslash; |
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368 | case CTLVAR: c = 'v'; goto backslash; |
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369 | case CTLVAR+CTLQUOTE: c = 'V'; goto backslash; |
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370 | case CTLBACKQ: c = 'q'; goto backslash; |
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371 | case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash; |
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372 | backslash: putc('\\', tracefile); |
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373 | putc(c, tracefile); |
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374 | break; |
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375 | default: |
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376 | if (*p >= ' ' && *p <= '~') |
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377 | putc(*p, tracefile); |
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378 | else { |
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379 | putc('\\', tracefile); |
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380 | putc(*p >> 6 & 03, tracefile); |
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381 | putc(*p >> 3 & 07, tracefile); |
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382 | putc(*p & 07, tracefile); |
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383 | } |
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384 | break; |
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385 | } |
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386 | } |
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387 | putc('"', tracefile); |
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388 | } |
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389 | #endif |
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390 | |||
391 | |||
392 | void |
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393 | trargs(ap) |
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394 | char **ap; |
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395 | { |
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396 | #ifdef DEBUG |
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397 | if (tracefile == NULL) |
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398 | return; |
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399 | while (*ap) { |
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400 | trstring(*ap++); |
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401 | if (*ap) |
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402 | putc(' ', tracefile); |
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403 | else |
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404 | putc('\n', tracefile); |
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405 | } |
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406 | fflush(tracefile); |
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407 | #endif |
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408 | } |
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409 | |||
410 | |||
411 | #ifdef DEBUG |
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412 | void |
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413 | opentrace() { |
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414 | char s[100]; |
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415 | #ifdef O_APPEND |
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416 | int flags; |
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417 | #endif |
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418 | |||
419 | if (!debug) |
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420 | return; |
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421 | #ifdef not_this_way |
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422 | { |
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423 | char *p; |
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424 | if ((p = getenv("HOME")) == NULL) { |
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425 | if (geteuid() == 0) |
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426 | p = "/"; |
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427 | else |
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428 | p = "/tmp"; |
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429 | } |
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430 | scopy(p, s); |
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431 | strcat(s, "/trace"); |
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432 | } |
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433 | #else |
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434 | scopy("./trace", s); |
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435 | #endif /* not_this_way */ |
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436 | if ((tracefile = fopen(s, "a")) == NULL) { |
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437 | fprintf(stderr, "Can't open %s\n", s); |
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438 | return; |
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439 | } |
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440 | #ifdef O_APPEND |
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441 | if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0) |
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442 | fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND); |
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443 | #endif |
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444 | fputs("\nTracing started.\n", tracefile); |
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445 | fflush(tracefile); |
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446 | } |
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447 | #endif /* DEBUG */ |