1 | /* $Header: /afs/dev.mit.edu/source/repository/third/tcsh/sh.dol.c,v 1.3 2005-06-03 15:17:09 ghudson Exp $ */ |
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2 | /* |
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3 | * sh.dol.c: Variable substitutions |
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4 | */ |
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5 | /*- |
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6 | * Copyright (c) 1980, 1991 The Regents of the University of California. |
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7 | * All rights reserved. |
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8 | * |
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9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions |
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11 | * are met: |
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12 | * 1. Redistributions of source code must retain the above copyright |
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13 | * notice, this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * 3. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | #include "sh.h" |
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34 | |
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35 | RCSID("$Id: sh.dol.c,v 1.3 2005-06-03 15:17:09 ghudson Exp $") |
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36 | |
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37 | /* |
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38 | * C shell |
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39 | */ |
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40 | |
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41 | /* |
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42 | * These routines perform variable substitution and quoting via ' and ". |
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43 | * To this point these constructs have been preserved in the divided |
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44 | * input words. Here we expand variables and turn quoting via ' and " into |
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45 | * QUOTE bits on characters (which prevent further interpretation). |
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46 | * If the `:q' modifier was applied during history expansion, then |
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47 | * some QUOTEing may have occurred already, so we dont "trim()" here. |
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48 | */ |
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49 | |
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50 | static Char Dpeekc; /* Peek for DgetC */ |
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51 | static eChar Dpeekrd; /* Peek for Dreadc */ |
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52 | static Char *Dcp, **Dvp; /* Input vector for Dreadc */ |
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53 | |
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54 | #define DEOF CHAR_ERR |
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55 | |
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56 | #define unDgetC(c) Dpeekc = c |
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57 | |
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58 | #define QUOTES (_QF|_QB|_ESC) /* \ ' " ` */ |
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59 | |
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60 | /* |
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61 | * The following variables give the information about the current |
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62 | * $ expansion, recording the current word position, the remaining |
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63 | * words within this expansion, the count of remaining words, and the |
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64 | * information about any : modifier which is being applied. |
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65 | */ |
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66 | #define MAXWLEN (BUFSIZE - 4) |
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67 | #ifndef COMPAT |
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68 | #define MAXMOD MAXWLEN /* This cannot overflow */ |
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69 | #endif /* COMPAT */ |
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70 | static Char *dolp; /* Remaining chars from this word */ |
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71 | static Char **dolnxt; /* Further words */ |
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72 | static int dolcnt; /* Count of further words */ |
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73 | #ifdef COMPAT |
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74 | static Char dolmod; /* : modifier character */ |
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75 | #else |
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76 | static Char dolmod[MAXMOD]; /* : modifier character */ |
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77 | static int dolnmod; /* Number of modifiers */ |
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78 | #endif /* COMPAT */ |
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79 | static int dolmcnt; /* :gx -> 10000, else 1 */ |
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80 | static int dolwcnt; /* :ax -> 10000, else 1 */ |
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81 | |
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82 | static void Dfix2 __P((Char **)); |
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83 | static Char *Dpack __P((Char *, Char *)); |
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84 | static int Dword __P((void)); |
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85 | static void dolerror __P((Char *)); |
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86 | static eChar DgetC __P((int)); |
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87 | static void Dgetdol __P((void)); |
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88 | static void fixDolMod __P((void)); |
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89 | static void setDolp __P((Char *)); |
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90 | static void unDredc __P((eChar)); |
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91 | static eChar Dredc __P((void)); |
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92 | static void Dtestq __P((Char)); |
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93 | |
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94 | /* |
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95 | * Fix up the $ expansions and quotations in the |
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96 | * argument list to command t. |
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97 | */ |
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98 | void |
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99 | Dfix(t) |
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100 | struct command *t; |
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101 | { |
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102 | Char **pp; |
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103 | Char *p; |
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104 | |
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105 | if (noexec) |
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106 | return; |
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107 | /* Note that t_dcom isn't trimmed thus !...:q's aren't lost */ |
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108 | for (pp = t->t_dcom; (p = *pp++) != NULL;) { |
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109 | for (; *p; p++) { |
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110 | if (cmap(*p, _DOL | QUOTES)) { /* $, \, ', ", ` */ |
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111 | Dfix2(t->t_dcom); /* found one */ |
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112 | blkfree(t->t_dcom); |
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113 | t->t_dcom = gargv; |
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114 | gargv = 0; |
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115 | return; |
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116 | } |
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117 | } |
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118 | } |
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119 | } |
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120 | |
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121 | /* |
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122 | * $ substitute one word, for i/o redirection |
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123 | */ |
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124 | Char * |
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125 | Dfix1(cp) |
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126 | Char *cp; |
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127 | { |
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128 | Char *Dv[2]; |
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129 | |
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130 | if (noexec) |
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131 | return (0); |
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132 | Dv[0] = cp; |
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133 | Dv[1] = NULL; |
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134 | Dfix2(Dv); |
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135 | if (gargc != 1) { |
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136 | setname(short2str(cp)); |
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137 | stderror(ERR_NAME | ERR_AMBIG); |
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138 | } |
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139 | cp = Strsave(gargv[0]); |
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140 | blkfree(gargv), gargv = 0; |
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141 | return (cp); |
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142 | } |
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143 | |
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144 | /* |
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145 | * Subroutine to do actual fixing after state initialization. |
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146 | */ |
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147 | static void |
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148 | Dfix2(v) |
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149 | Char **v; |
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150 | { |
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151 | ginit(); /* Initialize glob's area pointers */ |
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152 | Dvp = v; |
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153 | Dcp = STRNULL; /* Setup input vector for Dreadc */ |
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154 | unDgetC(0); |
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155 | unDredc(0); /* Clear out any old peeks (at error) */ |
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156 | dolp = 0; |
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157 | dolcnt = 0; /* Clear out residual $ expands (...) */ |
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158 | while (Dword()) |
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159 | continue; |
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160 | } |
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161 | |
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162 | /* |
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163 | * Pack up more characters in this word |
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164 | */ |
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165 | static Char * |
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166 | Dpack(wbuf, wp) |
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167 | Char *wbuf, *wp; |
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168 | { |
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169 | eChar c; |
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170 | int i = MAXWLEN - (int) (wp - wbuf); |
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171 | |
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172 | for (;;) { |
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173 | c = DgetC(DODOL); |
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174 | if (c == '\\') { |
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175 | c = DgetC(0); |
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176 | if (c == DEOF) { |
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177 | unDredc(c); |
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178 | *wp = 0; |
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179 | Gcat(STRNULL, wbuf); |
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180 | return (NULL); |
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181 | } |
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182 | if (c == '\n') |
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183 | c = ' '; |
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184 | else |
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185 | c |= QUOTE; |
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186 | } |
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187 | if (c == DEOF) { |
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188 | unDredc(c); |
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189 | *wp = 0; |
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190 | Gcat(STRNULL, wbuf); |
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191 | return (NULL); |
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192 | } |
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193 | if (cmap(c, _SP | _NL | _QF | _QB)) { /* sp \t\n'"` */ |
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194 | unDgetC(c); |
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195 | if (cmap(c, QUOTES)) |
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196 | return (wp); |
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197 | *wp++ = 0; |
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198 | Gcat(STRNULL, wbuf); |
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199 | return (NULL); |
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200 | } |
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201 | if (--i <= 0) |
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202 | stderror(ERR_WTOOLONG); |
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203 | *wp++ = (Char) c; |
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204 | } |
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205 | } |
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206 | |
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207 | /* |
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208 | * Get a word. This routine is analogous to the routine |
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209 | * word() in sh.lex.c for the main lexical input. One difference |
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210 | * here is that we don't get a newline to terminate our expansion. |
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211 | * Rather, DgetC will return a DEOF when we hit the end-of-input. |
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212 | */ |
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213 | static int |
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214 | Dword() |
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215 | { |
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216 | eChar c, c1; |
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217 | Char wbuf[BUFSIZE]; |
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218 | Char *wp = wbuf; |
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219 | int i = MAXWLEN; |
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220 | int dolflg; |
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221 | int sofar = 0, done = 0; |
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222 | |
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223 | while (!done) { |
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224 | done = 1; |
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225 | c = DgetC(DODOL); |
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226 | switch (c) { |
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227 | |
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228 | case DEOF: |
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229 | if (sofar == 0) |
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230 | return (0); |
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231 | /* finish this word and catch the code above the next time */ |
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232 | unDredc(c); |
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233 | /*FALLTHROUGH*/ |
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234 | |
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235 | case '\n': |
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236 | *wp = 0; |
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237 | Gcat(STRNULL, wbuf); |
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238 | return (1); |
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239 | |
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240 | case ' ': |
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241 | case '\t': |
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242 | done = 0; |
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243 | break; |
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244 | |
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245 | case '`': |
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246 | /* We preserve ` quotations which are done yet later */ |
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247 | *wp++ = (Char) c, --i; |
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248 | /*FALLTHROUGH*/ |
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249 | case '\'': |
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250 | case '"': |
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251 | /* |
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252 | * Note that DgetC never returns a QUOTES character from an |
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253 | * expansion, so only true input quotes will get us here or out. |
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254 | */ |
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255 | c1 = c; |
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256 | dolflg = c1 == '"' ? DODOL : 0; |
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257 | for (;;) { |
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258 | c = DgetC(dolflg); |
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259 | if (c == c1) |
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260 | break; |
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261 | if (c == '\n' || c == DEOF) |
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262 | stderror(ERR_UNMATCHED, (int)c1); |
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263 | if ((c & (QUOTE | TRIM)) == ('\n' | QUOTE)) { |
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264 | if ((wp[-1] & TRIM) == '\\') |
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265 | --wp; |
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266 | ++i; |
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267 | } |
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268 | if (--i <= 0) |
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269 | stderror(ERR_WTOOLONG); |
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270 | switch (c1) { |
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271 | |
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272 | case '"': |
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273 | /* |
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274 | * Leave any `s alone for later. Other chars are all |
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275 | * quoted, thus `...` can tell it was within "...". |
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276 | */ |
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277 | *wp++ = c == '`' ? '`' : c | QUOTE; |
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278 | break; |
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279 | |
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280 | case '\'': |
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281 | /* Prevent all further interpretation */ |
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282 | *wp++ = c | QUOTE; |
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283 | break; |
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284 | |
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285 | case '`': |
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286 | /* Leave all text alone for later */ |
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287 | *wp++ = (Char) c; |
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288 | break; |
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289 | |
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290 | default: |
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291 | break; |
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292 | } |
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293 | } |
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294 | if (c1 == '`') |
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295 | *wp++ = '`' /* i--; eliminated */; |
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296 | sofar = 1; |
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297 | if ((wp = Dpack(wbuf, wp)) == NULL) |
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298 | return (1); |
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299 | else { |
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300 | #ifdef masscomp |
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301 | /* |
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302 | * Avoid a nasty message from the RTU 4.1A & RTU 5.0 compiler concerning |
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303 | * the "overuse of registers". According to the compiler release notes, |
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304 | * incorrect code may be produced unless the offending expression is |
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305 | * rewritten. Therefore, we can't just ignore it, DAS DEC-90. |
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306 | */ |
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307 | i = MAXWLEN; |
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308 | i -= (int) (wp - wbuf); |
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309 | #else /* !masscomp */ |
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310 | i = MAXWLEN - (int) (wp - wbuf); |
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311 | #endif /* masscomp */ |
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312 | done = 0; |
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313 | } |
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314 | break; |
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315 | |
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316 | case '\\': |
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317 | c = DgetC(0); /* No $ subst! */ |
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318 | if (c == '\n' || c == DEOF) { |
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319 | done = 0; |
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320 | break; |
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321 | } |
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322 | c |= QUOTE; |
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323 | break; |
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324 | |
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325 | default: |
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326 | break; |
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327 | } |
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328 | if (done) { |
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329 | unDgetC(c); |
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330 | sofar = 1; |
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331 | if ((wp = Dpack(wbuf, wp)) == NULL) |
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332 | return (1); |
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333 | else { |
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334 | #ifdef masscomp |
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335 | /* |
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336 | * Avoid a nasty message from the RTU 4.1A & RTU 5.0 compiler concerning |
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337 | * the "overuse of registers". According to the compiler release notes, |
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338 | * incorrect code may be produced unless the offending expression is |
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339 | * rewritten. Therefore, we can't just ignore it, DAS DEC-90. |
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340 | */ |
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341 | i = MAXWLEN; |
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342 | i -= (int) (wp - wbuf); |
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343 | #else /* !masscomp */ |
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344 | i = MAXWLEN - (int) (wp - wbuf); |
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345 | #endif /* masscomp */ |
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346 | done = 0; |
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347 | } |
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348 | } |
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349 | } |
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350 | /* Really NOTREACHED */ |
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351 | return (0); |
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352 | } |
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353 | |
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354 | |
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355 | /* |
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356 | * Get a character, performing $ substitution unless flag is 0. |
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357 | * Any QUOTES character which is returned from a $ expansion is |
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358 | * QUOTEd so that it will not be recognized above. |
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359 | */ |
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360 | static eChar |
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361 | DgetC(flag) |
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362 | int flag; |
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363 | { |
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364 | Char c; |
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365 | |
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366 | top: |
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367 | if ((c = Dpeekc) != 0) { |
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368 | Dpeekc = 0; |
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369 | return (c); |
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370 | } |
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371 | if (lap) { |
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372 | c = *lap++ & (QUOTE | TRIM); |
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373 | if (c == 0) { |
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374 | lap = 0; |
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375 | goto top; |
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376 | } |
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377 | quotspec: |
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378 | if (cmap(c, QUOTES)) |
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379 | return (c | QUOTE); |
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380 | return (c); |
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381 | } |
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382 | if (dolp) { |
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383 | if ((c = *dolp++ & (QUOTE | TRIM)) != 0) |
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384 | goto quotspec; |
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385 | if (dolcnt > 0) { |
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386 | setDolp(*dolnxt++); |
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387 | --dolcnt; |
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388 | return (' '); |
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389 | } |
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390 | dolp = 0; |
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391 | } |
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392 | if (dolcnt > 0) { |
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393 | setDolp(*dolnxt++); |
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394 | --dolcnt; |
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395 | goto top; |
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396 | } |
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397 | c = Dredc(); |
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398 | if (c == '$' && flag) { |
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399 | Dgetdol(); |
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400 | goto top; |
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401 | } |
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402 | return (c); |
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403 | } |
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404 | |
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405 | static Char *nulvec[] = { NULL }; |
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406 | static struct varent nulargv = {nulvec, STRargv, VAR_READWRITE, |
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407 | { NULL, NULL, NULL }, 0 }; |
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408 | |
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409 | static void |
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410 | dolerror(s) |
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411 | Char *s; |
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412 | { |
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413 | setname(short2str(s)); |
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414 | stderror(ERR_NAME | ERR_RANGE); |
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415 | } |
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416 | |
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417 | /* |
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418 | * Handle the multitudinous $ expansion forms. |
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419 | * Ugh. |
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420 | */ |
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421 | static void |
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422 | Dgetdol() |
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423 | { |
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424 | Char *np; |
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425 | struct varent *vp = NULL; |
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426 | Char name[4 * MAXVARLEN + 1]; |
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427 | eChar c, sc; |
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428 | int subscr = 0, lwb = 1, upb = 0; |
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429 | int dimen = 0, bitset = 0, length = 0; |
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430 | Char wbuf[BUFSIZE]; |
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431 | static Char *dolbang = NULL; |
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432 | |
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433 | #ifdef COMPAT |
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434 | dolmod = dolmcnt = dolwcnt = 0; |
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435 | #else |
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436 | dolnmod = dolmcnt = dolwcnt = 0; |
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437 | #endif /* COMPAT */ |
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438 | c = sc = DgetC(0); |
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439 | if (c == '{') |
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440 | c = DgetC(0); /* sc is { to take } later */ |
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441 | if ((c & TRIM) == '#') |
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442 | dimen++, c = DgetC(0); /* $# takes dimension */ |
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443 | else if (c == '?') |
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444 | bitset++, c = DgetC(0); /* $? tests existence */ |
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445 | else if (c == '%') |
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446 | length++, c = DgetC(0); /* $% returns length in chars */ |
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447 | switch (c) { |
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448 | |
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449 | case '!': |
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450 | if (dimen || bitset || length) |
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451 | stderror(ERR_SYNTAX); |
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452 | if (backpid != 0) { |
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453 | if (dolbang) |
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454 | xfree((ptr_t) dolbang); |
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455 | setDolp(dolbang = putn(backpid)); |
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456 | } |
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457 | goto eatbrac; |
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458 | |
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459 | case '$': |
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460 | if (dimen || bitset || length) |
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461 | stderror(ERR_SYNTAX); |
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462 | setDolp(doldol); |
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463 | goto eatbrac; |
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464 | |
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465 | #ifdef COHERENT |
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466 | /* Coherent compiler doesn't allow case-labels that are not |
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467 | constant-expressions */ |
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468 | #ifdef WIDE_STRINGS |
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469 | case 0x4000003C: /* Does Coherent have 32-bit int at all? */ |
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470 | #elif defined (SHORT_STRINGS) |
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471 | case 0100074: |
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472 | #else /* !SHORT_STRINGS */ |
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473 | case 0274: |
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474 | #endif |
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475 | #else /* !COHERENT */ |
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476 | case '<'|QUOTE: |
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477 | #endif |
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478 | if (bitset) |
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479 | stderror(ERR_NOTALLOWED, "$?<"); |
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480 | if (dimen) |
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481 | stderror(ERR_NOTALLOWED, "$#<"); |
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482 | if (length) |
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483 | stderror(ERR_NOTALLOWED, "$%<"); |
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484 | { |
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485 | char cbuf[MB_LEN_MAX]; |
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486 | size_t cbp = 0; |
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487 | |
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488 | #ifdef BSDSIGS |
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489 | sigmask_t omask = sigsetmask(sigblock(0) & ~sigmask(SIGINT)); |
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490 | #else /* !BSDSIGS */ |
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491 | (void) sigrelse(SIGINT); |
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492 | #endif /* BSDSIGS */ |
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493 | np = wbuf; |
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494 | while (force_read(OLDSTD, cbuf + cbp++, 1) == 1) { |
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495 | int len; |
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496 | |
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497 | len = normal_mbtowc(np, cbuf, cbp); |
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498 | if (len == -1) { |
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499 | reset_mbtowc(); |
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500 | if (cbp < MB_LEN_MAX) |
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501 | continue; /* Maybe a partial character */ |
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502 | *np = (unsigned char)*cbuf | INVALID_BYTE; |
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503 | } |
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504 | if (len <= 0) |
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505 | len = 1; |
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506 | if (cbp != (size_t)len) |
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507 | memmove(cbuf, cbuf + len, cbp - len); |
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508 | cbp -= len; |
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509 | if (np >= &wbuf[BUFSIZE - 1]) |
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510 | stderror(ERR_LTOOLONG); |
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511 | if (*np == '\n') |
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512 | break; |
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513 | np++; |
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514 | } |
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515 | while (cbp != 0) { |
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516 | *np = (unsigned char)*cbuf; |
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517 | if (np >= &wbuf[BUFSIZE - 1]) |
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518 | stderror(ERR_LTOOLONG); |
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519 | if (*np == '\n') |
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520 | break; |
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521 | np++; |
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522 | cbp--; |
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523 | memmove(cbuf, cbuf + 1, cbp); |
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524 | } |
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525 | *np = 0; |
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526 | #ifdef BSDSIGS |
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527 | (void) sigsetmask(omask); |
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528 | #else /* !BSDSIGS */ |
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529 | (void) sighold(SIGINT); |
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530 | #endif /* BSDSIGS */ |
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531 | } |
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532 | |
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533 | #ifdef COMPAT |
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534 | /* |
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535 | * KLUDGE: dolmod is set here because it will cause setDolp to call |
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536 | * domod and thus to copy wbuf. Otherwise setDolp would use it |
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537 | * directly. If we saved it ourselves, no one would know when to free |
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538 | * it. The actual function of the 'q' causes filename expansion not to |
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539 | * be done on the interpolated value. |
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540 | */ |
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541 | /* |
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542 | * If we do that, then other modifiers don't work. |
---|
543 | * in addition, let the user specify :q if wanted |
---|
544 | * [christos] |
---|
545 | */ |
---|
546 | /*old*/ dolmod = 'q'; |
---|
547 | /*new*/ dolmod[dolnmod++] = 'q'; |
---|
548 | dolmcnt = 10000; |
---|
549 | #endif /* COMPAT */ |
---|
550 | |
---|
551 | fixDolMod(); |
---|
552 | setDolp(wbuf); |
---|
553 | goto eatbrac; |
---|
554 | |
---|
555 | case '*': |
---|
556 | (void) Strcpy(name, STRargv); |
---|
557 | vp = adrof(STRargv); |
---|
558 | subscr = -1; /* Prevent eating [...] */ |
---|
559 | break; |
---|
560 | |
---|
561 | case DEOF: |
---|
562 | case '\n': |
---|
563 | np = dimen ? STRargv : (bitset ? STRstatus : NULL); |
---|
564 | if (np) { |
---|
565 | bitset = 0; |
---|
566 | (void) Strcpy(name, np); |
---|
567 | vp = adrof(np); |
---|
568 | subscr = -1; /* Prevent eating [...] */ |
---|
569 | unDredc(c); |
---|
570 | break; |
---|
571 | } |
---|
572 | else |
---|
573 | stderror(ERR_SYNTAX); |
---|
574 | /*NOTREACHED*/ |
---|
575 | |
---|
576 | default: |
---|
577 | np = name; |
---|
578 | if (Isdigit(c)) { |
---|
579 | if (dimen) |
---|
580 | stderror(ERR_NOTALLOWED, "$#<num>"); |
---|
581 | subscr = 0; |
---|
582 | do { |
---|
583 | subscr = subscr * 10 + c - '0'; |
---|
584 | c = DgetC(0); |
---|
585 | } while (Isdigit(c)); |
---|
586 | unDredc(c); |
---|
587 | if (subscr < 0) |
---|
588 | stderror(ERR_RANGE); |
---|
589 | if (subscr == 0) { |
---|
590 | if (bitset) { |
---|
591 | dolp = dolzero ? STR1 : STR0; |
---|
592 | goto eatbrac; |
---|
593 | } |
---|
594 | if (ffile == 0) |
---|
595 | stderror(ERR_DOLZERO); |
---|
596 | if (length) { |
---|
597 | Char *cp; |
---|
598 | length = NLSChars(ffile); |
---|
599 | cp = putn(length); |
---|
600 | addla(cp); |
---|
601 | xfree((ptr_t) cp); |
---|
602 | } |
---|
603 | else { |
---|
604 | fixDolMod(); |
---|
605 | setDolp(ffile); |
---|
606 | } |
---|
607 | goto eatbrac; |
---|
608 | } |
---|
609 | #if 0 |
---|
610 | if (bitset) |
---|
611 | stderror(ERR_NOTALLOWED, "$?<num>"); |
---|
612 | if (length) |
---|
613 | stderror(ERR_NOTALLOWED, "$%<num>"); |
---|
614 | #endif |
---|
615 | vp = adrof(STRargv); |
---|
616 | if (vp == 0) { |
---|
617 | vp = &nulargv; |
---|
618 | goto eatmod; |
---|
619 | } |
---|
620 | break; |
---|
621 | } |
---|
622 | if (!alnum(c)) { |
---|
623 | np = dimen ? STRargv : (bitset ? STRstatus : NULL); |
---|
624 | if (np) { |
---|
625 | bitset = 0; |
---|
626 | (void) Strcpy(name, np); |
---|
627 | vp = adrof(np); |
---|
628 | subscr = -1; /* Prevent eating [...] */ |
---|
629 | unDredc(c); |
---|
630 | break; |
---|
631 | } |
---|
632 | else |
---|
633 | stderror(ERR_VARALNUM); |
---|
634 | } |
---|
635 | for (;;) { |
---|
636 | *np++ = (Char) c; |
---|
637 | c = DgetC(0); |
---|
638 | if (!alnum(c)) |
---|
639 | break; |
---|
640 | if (np >= &name[MAXVARLEN]) |
---|
641 | stderror(ERR_VARTOOLONG); |
---|
642 | } |
---|
643 | *np++ = 0; |
---|
644 | unDredc(c); |
---|
645 | vp = adrof(name); |
---|
646 | } |
---|
647 | if (bitset) { |
---|
648 | dolp = (vp || getenv(short2str(name))) ? STR1 : STR0; |
---|
649 | goto eatbrac; |
---|
650 | } |
---|
651 | if (vp == NULL || vp->vec == NULL) { |
---|
652 | np = str2short(getenv(short2str(name))); |
---|
653 | if (np) { |
---|
654 | fixDolMod(); |
---|
655 | setDolp(np); |
---|
656 | goto eatbrac; |
---|
657 | } |
---|
658 | udvar(name); |
---|
659 | /* NOTREACHED */ |
---|
660 | } |
---|
661 | c = DgetC(0); |
---|
662 | upb = blklen(vp->vec); |
---|
663 | if (dimen == 0 && subscr == 0 && c == '[') { |
---|
664 | np = name; |
---|
665 | for (;;) { |
---|
666 | c = DgetC(DODOL); /* Allow $ expand within [ ] */ |
---|
667 | if (c == ']') |
---|
668 | break; |
---|
669 | if (c == '\n' || c == DEOF) |
---|
670 | stderror(ERR_INCBR); |
---|
671 | if (np >= &name[sizeof(name) / sizeof(Char) - 2]) |
---|
672 | stderror(ERR_VARTOOLONG); |
---|
673 | *np++ = (Char) c; |
---|
674 | } |
---|
675 | *np = 0, np = name; |
---|
676 | if (dolp || dolcnt) /* $ exp must end before ] */ |
---|
677 | stderror(ERR_EXPORD); |
---|
678 | if (!*np) |
---|
679 | stderror(ERR_SYNTAX); |
---|
680 | if (Isdigit(*np)) { |
---|
681 | int i; |
---|
682 | |
---|
683 | for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0') |
---|
684 | continue; |
---|
685 | if ((i < 0 || i > upb) && !any("-*", *np)) { |
---|
686 | dolerror(vp->v_name); |
---|
687 | return; |
---|
688 | } |
---|
689 | lwb = i; |
---|
690 | if (!*np) |
---|
691 | upb = lwb, np = STRstar; |
---|
692 | } |
---|
693 | if (*np == '*') |
---|
694 | np++; |
---|
695 | else if (*np != '-') |
---|
696 | stderror(ERR_MISSING, '-'); |
---|
697 | else { |
---|
698 | int i = upb; |
---|
699 | |
---|
700 | np++; |
---|
701 | if (Isdigit(*np)) { |
---|
702 | i = 0; |
---|
703 | while (Isdigit(*np)) |
---|
704 | i = i * 10 + *np++ - '0'; |
---|
705 | if (i < 0 || i > upb) { |
---|
706 | dolerror(vp->v_name); |
---|
707 | return; |
---|
708 | } |
---|
709 | } |
---|
710 | if (i < lwb) |
---|
711 | upb = lwb - 1; |
---|
712 | else |
---|
713 | upb = i; |
---|
714 | } |
---|
715 | if (lwb == 0) { |
---|
716 | if (upb != 0) { |
---|
717 | dolerror(vp->v_name); |
---|
718 | return; |
---|
719 | } |
---|
720 | upb = -1; |
---|
721 | } |
---|
722 | if (*np) |
---|
723 | stderror(ERR_SYNTAX); |
---|
724 | } |
---|
725 | else { |
---|
726 | if (subscr > 0) { |
---|
727 | if (subscr > upb) |
---|
728 | lwb = 1, upb = 0; |
---|
729 | else |
---|
730 | lwb = upb = subscr; |
---|
731 | } |
---|
732 | unDredc(c); |
---|
733 | } |
---|
734 | if (dimen) { |
---|
735 | Char *cp = putn(upb - lwb + 1); |
---|
736 | |
---|
737 | /* this is a kludge. It prevents Dgetdol() from */ |
---|
738 | /* pushing erroneous ${#<error> values into the labuf. */ |
---|
739 | if (sc == '{') { |
---|
740 | c = Dredc(); |
---|
741 | if (c != '}') |
---|
742 | { |
---|
743 | xfree((ptr_t) cp); |
---|
744 | stderror(ERR_MISSING, '}'); |
---|
745 | return; |
---|
746 | } |
---|
747 | unDredc(c); |
---|
748 | } |
---|
749 | addla(cp); |
---|
750 | xfree((ptr_t) cp); |
---|
751 | } |
---|
752 | else if (length) { |
---|
753 | int i; |
---|
754 | Char *cp; |
---|
755 | for (i = lwb - 1, length = 0; i < upb; i++) |
---|
756 | length += NLSChars(vp->vec[i]); |
---|
757 | #ifdef notdef |
---|
758 | /* We don't want that, since we can always compute it by adding $#xxx */ |
---|
759 | length += i - 1; /* Add the number of spaces in */ |
---|
760 | #endif |
---|
761 | cp = putn(length); |
---|
762 | addla(cp); |
---|
763 | xfree((ptr_t) cp); |
---|
764 | } |
---|
765 | else { |
---|
766 | eatmod: |
---|
767 | fixDolMod(); |
---|
768 | dolnxt = &vp->vec[lwb - 1]; |
---|
769 | dolcnt = upb - lwb + 1; |
---|
770 | } |
---|
771 | eatbrac: |
---|
772 | if (sc == '{') { |
---|
773 | c = Dredc(); |
---|
774 | if (c != '}') |
---|
775 | stderror(ERR_MISSING, '}'); |
---|
776 | } |
---|
777 | } |
---|
778 | |
---|
779 | static void |
---|
780 | fixDolMod() |
---|
781 | { |
---|
782 | eChar c; |
---|
783 | |
---|
784 | c = DgetC(0); |
---|
785 | if (c == ':') { |
---|
786 | #ifndef COMPAT |
---|
787 | do { |
---|
788 | #endif /* COMPAT */ |
---|
789 | c = DgetC(0), dolmcnt = 1, dolwcnt = 1; |
---|
790 | if (c == 'g' || c == 'a') { |
---|
791 | if (c == 'g') |
---|
792 | dolmcnt = 10000; |
---|
793 | else |
---|
794 | dolwcnt = 10000; |
---|
795 | c = DgetC(0); |
---|
796 | } |
---|
797 | if ((c == 'g' && dolmcnt != 10000) || |
---|
798 | (c == 'a' && dolwcnt != 10000)) { |
---|
799 | if (c == 'g') |
---|
800 | dolmcnt = 10000; |
---|
801 | else |
---|
802 | dolwcnt = 10000; |
---|
803 | c = DgetC(0); |
---|
804 | } |
---|
805 | |
---|
806 | if (c == 's') { /* [eichin:19910926.0755EST] */ |
---|
807 | int delimcnt = 2; |
---|
808 | eChar delim = DgetC(0); |
---|
809 | dolmod[dolnmod++] = (Char) c; |
---|
810 | dolmod[dolnmod++] = (Char) delim; |
---|
811 | |
---|
812 | if (!delim || letter(delim) |
---|
813 | || Isdigit(delim) || any(" \t\n", delim)) { |
---|
814 | seterror(ERR_BADSUBST); |
---|
815 | break; |
---|
816 | } |
---|
817 | while ((c = DgetC(0)) != DEOF) { |
---|
818 | dolmod[dolnmod++] = (Char) c; |
---|
819 | if(c == delim) delimcnt--; |
---|
820 | if(!delimcnt) break; |
---|
821 | } |
---|
822 | if(delimcnt) { |
---|
823 | seterror(ERR_BADSUBST); |
---|
824 | break; |
---|
825 | } |
---|
826 | continue; |
---|
827 | } |
---|
828 | if (!any("luhtrqxes", c)) |
---|
829 | stderror(ERR_BADMOD, (int)c); |
---|
830 | #ifndef COMPAT |
---|
831 | dolmod[dolnmod++] = (Char) c; |
---|
832 | #else |
---|
833 | dolmod = (Char) c; |
---|
834 | #endif /* COMPAT */ |
---|
835 | if (c == 'q') |
---|
836 | dolmcnt = 10000; |
---|
837 | #ifndef COMPAT |
---|
838 | } |
---|
839 | while ((c = DgetC(0)) == ':'); |
---|
840 | unDredc(c); |
---|
841 | #endif /* COMPAT */ |
---|
842 | } |
---|
843 | else |
---|
844 | unDredc(c); |
---|
845 | } |
---|
846 | |
---|
847 | static void |
---|
848 | setDolp(cp) |
---|
849 | Char *cp; |
---|
850 | { |
---|
851 | Char *dp; |
---|
852 | #ifndef COMPAT |
---|
853 | int i; |
---|
854 | #endif /* COMPAT */ |
---|
855 | |
---|
856 | #ifdef COMPAT |
---|
857 | if (dolmod == 0 || dolmcnt == 0) { |
---|
858 | #else |
---|
859 | if (dolnmod == 0 || dolmcnt == 0) { |
---|
860 | #endif /* COMPAT */ |
---|
861 | for (dp = cp; *dp; dp++) { |
---|
862 | if (NLSSize(dp, -1) != 1) { |
---|
863 | addla(cp); |
---|
864 | return; |
---|
865 | } |
---|
866 | } |
---|
867 | dolp = cp; |
---|
868 | return; |
---|
869 | } |
---|
870 | #ifdef COMPAT |
---|
871 | dp = domod(cp, dolmod); |
---|
872 | #else |
---|
873 | dp = cp = Strsave(cp); |
---|
874 | for (i = 0; i < dolnmod; i++) { |
---|
875 | /* handle s// [eichin:19910926.0510EST] */ |
---|
876 | if(dolmod[i] == 's') { |
---|
877 | Char delim; |
---|
878 | Char *lhsub, *rhsub, *np; |
---|
879 | size_t lhlen = 0, rhlen = 0; |
---|
880 | int didmod = 0; |
---|
881 | |
---|
882 | delim = dolmod[++i]; |
---|
883 | if (!delim || letter(delim) |
---|
884 | || Isdigit(delim) || any(" \t\n", delim)) { |
---|
885 | seterror(ERR_BADSUBST); |
---|
886 | break; |
---|
887 | } |
---|
888 | lhsub = &dolmod[++i]; |
---|
889 | while(dolmod[i] != delim && dolmod[++i]) { |
---|
890 | lhlen++; |
---|
891 | } |
---|
892 | dolmod[i] = 0; |
---|
893 | rhsub = &dolmod[++i]; |
---|
894 | while(dolmod[i] != delim && dolmod[++i]) { |
---|
895 | rhlen++; |
---|
896 | } |
---|
897 | dolmod[i] = 0; |
---|
898 | |
---|
899 | do { |
---|
900 | strip(lhsub); |
---|
901 | strip(cp); |
---|
902 | dp = Strstr(cp, lhsub); |
---|
903 | if (dp) { |
---|
904 | np = (Char *) xmalloc((size_t) |
---|
905 | ((Strlen(cp) + 1 - lhlen + rhlen) * |
---|
906 | sizeof(Char))); |
---|
907 | (void) Strncpy(np, cp, (size_t) (dp - cp)); |
---|
908 | (void) Strcpy(np + (dp - cp), rhsub); |
---|
909 | (void) Strcpy(np + (dp - cp) + rhlen, dp + lhlen); |
---|
910 | |
---|
911 | xfree((ptr_t) cp); |
---|
912 | dp = cp = np; |
---|
913 | didmod = 1; |
---|
914 | } else { |
---|
915 | /* should this do a seterror? */ |
---|
916 | break; |
---|
917 | } |
---|
918 | } |
---|
919 | while (dolwcnt == 10000); |
---|
920 | /* |
---|
921 | * restore dolmod for additional words |
---|
922 | */ |
---|
923 | dolmod[i] = rhsub[-1] = (Char) delim; |
---|
924 | if (didmod) |
---|
925 | dolmcnt--; |
---|
926 | #ifdef notdef |
---|
927 | else |
---|
928 | break; |
---|
929 | #endif |
---|
930 | } else { |
---|
931 | int didmod = 0; |
---|
932 | |
---|
933 | do { |
---|
934 | if ((dp = domod(cp, dolmod[i])) != NULL) { |
---|
935 | didmod = 1; |
---|
936 | if (Strcmp(cp, dp) == 0) { |
---|
937 | xfree((ptr_t) cp); |
---|
938 | cp = dp; |
---|
939 | break; |
---|
940 | } |
---|
941 | else { |
---|
942 | xfree((ptr_t) cp); |
---|
943 | cp = dp; |
---|
944 | } |
---|
945 | } |
---|
946 | else |
---|
947 | break; |
---|
948 | } |
---|
949 | while (dolwcnt == 10000); |
---|
950 | dp = cp; |
---|
951 | if (didmod) |
---|
952 | dolmcnt--; |
---|
953 | #ifdef notdef |
---|
954 | else |
---|
955 | break; |
---|
956 | #endif |
---|
957 | } |
---|
958 | } |
---|
959 | #endif /* COMPAT */ |
---|
960 | |
---|
961 | if (dp) { |
---|
962 | #ifdef COMPAT |
---|
963 | dolmcnt--; |
---|
964 | #endif /* COMPAT */ |
---|
965 | addla(dp); |
---|
966 | xfree((ptr_t) dp); |
---|
967 | } |
---|
968 | #ifndef COMPAT |
---|
969 | else |
---|
970 | addla(cp); |
---|
971 | #endif /* COMPAT */ |
---|
972 | |
---|
973 | dolp = STRNULL; |
---|
974 | if (seterr) |
---|
975 | stderror(ERR_OLD); |
---|
976 | } |
---|
977 | |
---|
978 | static void |
---|
979 | unDredc(c) |
---|
980 | eChar c; |
---|
981 | { |
---|
982 | |
---|
983 | Dpeekrd = c; |
---|
984 | } |
---|
985 | |
---|
986 | static eChar |
---|
987 | Dredc() |
---|
988 | { |
---|
989 | Char c; |
---|
990 | |
---|
991 | if ((c = Dpeekrd) != 0) { |
---|
992 | Dpeekrd = 0; |
---|
993 | return (c); |
---|
994 | } |
---|
995 | if (Dcp && (c = *Dcp++)) |
---|
996 | return (c & (QUOTE | TRIM)); |
---|
997 | if (*Dvp == 0) { |
---|
998 | Dcp = 0; |
---|
999 | return (DEOF); |
---|
1000 | } |
---|
1001 | Dcp = *Dvp++; |
---|
1002 | return (' '); |
---|
1003 | } |
---|
1004 | |
---|
1005 | static void |
---|
1006 | Dtestq(c) |
---|
1007 | Char c; |
---|
1008 | { |
---|
1009 | |
---|
1010 | if (cmap(c, QUOTES)) |
---|
1011 | gflag = 1; |
---|
1012 | } |
---|
1013 | |
---|
1014 | /* |
---|
1015 | * Form a shell temporary file (in unit 0) from the words |
---|
1016 | * of the shell input up to EOF or a line the same as "term". |
---|
1017 | * Unit 0 should have been closed before this call. |
---|
1018 | */ |
---|
1019 | void |
---|
1020 | heredoc(term) |
---|
1021 | Char *term; |
---|
1022 | { |
---|
1023 | eChar c; |
---|
1024 | Char *Dv[2]; |
---|
1025 | Char obuf[BUFSIZE + 1], lbuf[BUFSIZE], mbuf[BUFSIZE]; |
---|
1026 | int ocnt, lcnt, mcnt; |
---|
1027 | Char *lbp, *obp, *mbp; |
---|
1028 | Char **vp; |
---|
1029 | int quoted; |
---|
1030 | char *tmp; |
---|
1031 | #ifndef WINNT_NATIVE |
---|
1032 | struct timeval tv; |
---|
1033 | |
---|
1034 | again: |
---|
1035 | #endif /* WINNT_NATIVE */ |
---|
1036 | tmp = short2str(shtemp); |
---|
1037 | #ifndef O_CREAT |
---|
1038 | # define O_CREAT 0 |
---|
1039 | if (creat(tmp, 0600) < 0) |
---|
1040 | stderror(ERR_SYSTEM, tmp, strerror(errno)); |
---|
1041 | #endif |
---|
1042 | (void) close(0); |
---|
1043 | #ifndef O_TEMPORARY |
---|
1044 | # define O_TEMPORARY 0 |
---|
1045 | #endif |
---|
1046 | #ifndef O_EXCL |
---|
1047 | # define O_EXCL 0 |
---|
1048 | #endif |
---|
1049 | if (open(tmp, O_RDWR|O_CREAT|O_EXCL|O_TEMPORARY|O_LARGEFILE, 0600) == -1) { |
---|
1050 | int oerrno = errno; |
---|
1051 | #ifndef WINNT_NATIVE |
---|
1052 | if (errno == EEXIST) { |
---|
1053 | if (unlink(tmp) == -1) { |
---|
1054 | (void) gettimeofday(&tv, NULL); |
---|
1055 | shtemp = Strspl(STRtmpsh, putn((((int)tv.tv_sec) ^ |
---|
1056 | ((int)tv.tv_usec) ^ ((int)getpid())) & 0x00ffffff)); |
---|
1057 | } |
---|
1058 | goto again; |
---|
1059 | } |
---|
1060 | #endif /* WINNT_NATIVE */ |
---|
1061 | (void) unlink(tmp); |
---|
1062 | errno = oerrno; |
---|
1063 | stderror(ERR_SYSTEM, tmp, strerror(errno)); |
---|
1064 | } |
---|
1065 | (void) unlink(tmp); /* 0 0 inode! */ |
---|
1066 | Dv[0] = term; |
---|
1067 | Dv[1] = NULL; |
---|
1068 | gflag = 0; |
---|
1069 | trim(Dv); |
---|
1070 | rscan(Dv, Dtestq); |
---|
1071 | quoted = gflag; |
---|
1072 | ocnt = BUFSIZE; |
---|
1073 | obp = obuf; |
---|
1074 | obuf[BUFSIZE] = 0; |
---|
1075 | inheredoc = 1; |
---|
1076 | #ifdef WINNT_NATIVE |
---|
1077 | __dup_stdin = 1; |
---|
1078 | #endif /* WINNT_NATIVE */ |
---|
1079 | #ifdef O_TEXT |
---|
1080 | setmode(1, O_TEXT); |
---|
1081 | #endif |
---|
1082 | #ifdef O_BINARY |
---|
1083 | setmode(0, O_BINARY); |
---|
1084 | #endif |
---|
1085 | for (;;) { |
---|
1086 | /* |
---|
1087 | * Read up a line |
---|
1088 | */ |
---|
1089 | lbp = lbuf; |
---|
1090 | lcnt = BUFSIZE - 4; |
---|
1091 | for (;;) { |
---|
1092 | c = readc(1); /* 1 -> Want EOF returns */ |
---|
1093 | if (c == CHAR_ERR || c == '\n') |
---|
1094 | break; |
---|
1095 | if ((c &= TRIM) != 0) { |
---|
1096 | *lbp++ = (Char) c; |
---|
1097 | if (--lcnt < 0) { |
---|
1098 | setname("<<"); |
---|
1099 | stderror(ERR_NAME | ERR_OVERFLOW); |
---|
1100 | } |
---|
1101 | } |
---|
1102 | } |
---|
1103 | *lbp = 0; |
---|
1104 | |
---|
1105 | /* |
---|
1106 | * Check for EOF or compare to terminator -- before expansion |
---|
1107 | */ |
---|
1108 | if (c == CHAR_ERR || eq(lbuf, term)) { |
---|
1109 | *obp = 0; |
---|
1110 | tmp = short2str(obuf); |
---|
1111 | (void) write(0, tmp, strlen (tmp)); |
---|
1112 | (void) lseek(0, (off_t) 0, L_SET); |
---|
1113 | inheredoc = 0; |
---|
1114 | return; |
---|
1115 | } |
---|
1116 | |
---|
1117 | /* |
---|
1118 | * If term was quoted or -n just pass it on |
---|
1119 | */ |
---|
1120 | if (quoted || noexec) { |
---|
1121 | *lbp++ = '\n'; |
---|
1122 | *lbp = 0; |
---|
1123 | for (lbp = lbuf; (c = *lbp++) != 0;) { |
---|
1124 | *obp++ = (Char) c; |
---|
1125 | if (--ocnt == 0) { |
---|
1126 | tmp = short2str(obuf); |
---|
1127 | (void) write(0, tmp, strlen (tmp)); |
---|
1128 | obp = obuf; |
---|
1129 | ocnt = BUFSIZE; |
---|
1130 | } |
---|
1131 | } |
---|
1132 | continue; |
---|
1133 | } |
---|
1134 | |
---|
1135 | /* |
---|
1136 | * Term wasn't quoted so variable and then command expand the input |
---|
1137 | * line |
---|
1138 | */ |
---|
1139 | Dcp = lbuf; |
---|
1140 | Dvp = Dv + 1; |
---|
1141 | mbp = mbuf; |
---|
1142 | mcnt = BUFSIZE - 4; |
---|
1143 | for (;;) { |
---|
1144 | c = DgetC(DODOL); |
---|
1145 | if (c == DEOF) |
---|
1146 | break; |
---|
1147 | if ((c &= TRIM) == 0) |
---|
1148 | continue; |
---|
1149 | /* \ quotes \ $ ` here */ |
---|
1150 | if (c == '\\') { |
---|
1151 | c = DgetC(0); |
---|
1152 | if (!any("$\\`", c)) |
---|
1153 | unDgetC(c | QUOTE), c = '\\'; |
---|
1154 | else |
---|
1155 | c |= QUOTE; |
---|
1156 | } |
---|
1157 | *mbp++ = (Char) c; |
---|
1158 | if (--mcnt == 0) { |
---|
1159 | setname("<<"); |
---|
1160 | stderror(ERR_NAME | ERR_OVERFLOW); |
---|
1161 | } |
---|
1162 | } |
---|
1163 | *mbp++ = 0; |
---|
1164 | |
---|
1165 | /* |
---|
1166 | * If any ` in line do command substitution |
---|
1167 | */ |
---|
1168 | mbp = mbuf; |
---|
1169 | if (Strchr(mbp, '`') != NULL) { |
---|
1170 | /* |
---|
1171 | * 1 arg to dobackp causes substitution to be literal. Words are |
---|
1172 | * broken only at newlines so that all blanks and tabs are |
---|
1173 | * preserved. Blank lines (null words) are not discarded. |
---|
1174 | */ |
---|
1175 | vp = dobackp(mbuf, 1); |
---|
1176 | } |
---|
1177 | else |
---|
1178 | /* Setup trivial vector similar to return of dobackp */ |
---|
1179 | Dv[0] = mbp, Dv[1] = NULL, vp = Dv; |
---|
1180 | |
---|
1181 | /* |
---|
1182 | * Resurrect the words from the command substitution each separated by |
---|
1183 | * a newline. Note that the last newline of a command substitution |
---|
1184 | * will have been discarded, but we put a newline after the last word |
---|
1185 | * because this represents the newline after the last input line! |
---|
1186 | */ |
---|
1187 | for (; *vp; vp++) { |
---|
1188 | for (mbp = *vp; *mbp; mbp++) { |
---|
1189 | *obp++ = *mbp & TRIM; |
---|
1190 | if (--ocnt == 0) { |
---|
1191 | tmp = short2str(obuf); |
---|
1192 | (void) write(0, tmp, strlen (tmp)); |
---|
1193 | obp = obuf; |
---|
1194 | ocnt = BUFSIZE; |
---|
1195 | } |
---|
1196 | } |
---|
1197 | *obp++ = '\n'; |
---|
1198 | if (--ocnt == 0) { |
---|
1199 | tmp = short2str(obuf); |
---|
1200 | (void) write(0, tmp, strlen (tmp)); |
---|
1201 | obp = obuf; |
---|
1202 | ocnt = BUFSIZE; |
---|
1203 | } |
---|
1204 | } |
---|
1205 | if (pargv) |
---|
1206 | blkfree(pargv), pargv = 0; |
---|
1207 | } |
---|
1208 | } |
---|