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2714 | cejka | 1 | /* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */ |
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3 | /*- |
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4 | * Copyright (c) 1991, 1993 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * This code is derived from software contributed to Berkeley by |
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8 | * Kenneth Almquist. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 3. 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 | * @(#)var.h 8.2 (Berkeley) 5/4/95 |
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39 | */ |
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40 | |||
41 | /* |
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42 | * Shell variables. |
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43 | */ |
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44 | |||
45 | /* flags */ |
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46 | #define VEXPORT 0x01 /* variable is exported */ |
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47 | #define VREADONLY 0x02 /* variable cannot be modified */ |
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48 | #define VSTRFIXED 0x04 /* variable struct is staticly allocated */ |
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49 | #define VTEXTFIXED 0x08 /* text is staticly allocated */ |
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50 | #define VSTACK 0x10 /* text is allocated on the stack */ |
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51 | #define VUNSET 0x20 /* the variable is not set */ |
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52 | #define VNOFUNC 0x40 /* don't call the callback function */ |
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53 | |||
54 | |||
55 | struct var { |
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56 | struct var *next; /* next entry in hash list */ |
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57 | int flags; /* flags are defined above */ |
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58 | char *text; /* name=value */ |
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59 | void (*func) (const char *); |
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60 | /* function to be called when */ |
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61 | /* the variable gets set/unset */ |
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62 | }; |
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63 | |||
64 | |||
65 | struct localvar { |
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66 | struct localvar *next; /* next local variable in list */ |
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67 | struct var *vp; /* the variable that was made local */ |
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68 | int flags; /* saved flags */ |
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69 | char *text; /* saved text */ |
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70 | }; |
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71 | |||
72 | |||
73 | struct localvar *localvars; |
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74 | |||
75 | #if ATTY |
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76 | extern struct var vatty; |
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77 | #endif |
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78 | extern struct var vifs; |
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79 | extern struct var vmail; |
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80 | extern struct var vmpath; |
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81 | extern struct var vpath; |
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82 | extern struct var vps1; |
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83 | extern struct var vps2; |
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84 | #ifndef SMALL |
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85 | extern struct var vterm; |
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86 | extern struct var vtermcap; |
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87 | extern struct var vhistsize; |
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88 | #endif |
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89 | |||
90 | /* |
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91 | * The following macros access the values of the above variables. |
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92 | * They have to skip over the name. They return the null string |
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93 | * for unset variables. |
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94 | */ |
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95 | |||
96 | #define ifsval() (vifs.text + 4) |
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97 | #define ifsset() ((vifs.flags & VUNSET) == 0) |
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98 | #define mailval() (vmail.text + 5) |
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99 | #define mpathval() (vmpath.text + 9) |
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100 | #define pathval() (vpath.text + 5) |
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101 | #define ps1val() (vps1.text + 4) |
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102 | #define ps2val() (vps2.text + 4) |
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103 | #define optindval() (voptind.text + 7) |
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104 | #ifndef SMALL |
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105 | #define histsizeval() (vhistsize.text + 9) |
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106 | #define termval() (vterm.text + 5) |
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107 | #endif |
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108 | |||
109 | #if ATTY |
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110 | #define attyset() ((vatty.flags & VUNSET) == 0) |
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111 | #endif |
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112 | #define mpathset() ((vmpath.flags & VUNSET) == 0) |
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113 | |||
114 | void initvar (void); |
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115 | void setvar (const char *, const char *, int); |
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116 | void setvareq (char *, int); |
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117 | struct strlist; |
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118 | void listsetvar (struct strlist *); |
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119 | char *lookupvar (const char *); |
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120 | char *bltinlookup (const char *, int); |
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121 | char **environment (void); |
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122 | void shprocvar (void); |
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123 | int showvarscmd (int, char **); |
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124 | int exportcmd (int, char **); |
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125 | int localcmd (int, char **); |
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126 | void mklocal (char *); |
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127 | void poplocalvars (void); |
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128 | int setvarcmd (int, char **); |
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129 | int unsetcmd (int, char **); |
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130 | int unsetvar (const char *); |
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131 | int setvarsafe (const char *, const char *, int); |