1 | /* $Header: /afs/dev.mit.edu/source/repository/third/tcsh/tw.init.c,v 1.3 2007-10-26 18:25:37 ghudson Exp $ */ |
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2 | /* |
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3 | * tw.init.c: Handle lists of things to complete |
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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: tw.init.c,v 1.3 2007-10-26 18:25:37 ghudson Exp $") |
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36 | |
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37 | #include "tw.h" |
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38 | #include "ed.h" |
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39 | #include "tc.h" |
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40 | #include "sh.proc.h" |
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41 | |
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42 | #define TW_INCR 128 |
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43 | |
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44 | typedef struct { |
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45 | Char **list, /* List of command names */ |
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46 | *buff; /* Space holding command names */ |
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47 | int nlist, /* Number of items */ |
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48 | nbuff, /* Current space in name buf */ |
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49 | tlist, /* Total space in list */ |
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50 | tbuff; /* Total space in name buf */ |
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51 | } stringlist_t; |
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52 | |
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53 | |
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54 | static struct varent *tw_vptr = NULL; /* Current shell variable */ |
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55 | static Char **tw_env = NULL; /* Current environment variable */ |
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56 | static Char *tw_word; /* Current word pointer */ |
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57 | static struct KeyFuncs *tw_bind = NULL; /* List of the bindings */ |
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58 | #ifndef HAVENOLIMIT |
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59 | static struct limits *tw_limit = NULL; /* List of the resource limits */ |
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60 | #endif /* HAVENOLIMIT */ |
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61 | static int tw_index = 0; /* signal and job index */ |
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62 | static DIR *tw_dir_fd = NULL; /* Current directory descriptor */ |
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63 | static Char tw_retname[MAXPATHLEN+1]; /* Return buffer */ |
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64 | static int tw_cmd_got = 0; /* What we need to do */ |
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65 | static stringlist_t tw_cmd = { NULL, NULL, 0, 0, 0, 0 }; |
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66 | static stringlist_t tw_item = { NULL, NULL, 0, 0, 0, 0 }; |
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67 | #define TW_FL_CMD 0x01 |
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68 | #define TW_FL_ALIAS 0x02 |
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69 | #define TW_FL_BUILTIN 0x04 |
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70 | #define TW_FL_SORT 0x08 |
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71 | #define TW_FL_REL 0x10 |
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72 | |
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73 | static struct { /* Current element pointer */ |
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74 | int cur; /* Current element number */ |
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75 | Char **pathv; /* Current element in path */ |
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76 | DIR *dfd; /* Current directory descriptor */ |
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77 | } tw_cmd_state; |
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78 | |
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79 | |
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80 | #ifdef BSDSIGS |
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81 | static sigmask_t tw_omask; |
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82 | # define TW_HOLD() tw_omask = sigblock(sigmask(SIGINT)) |
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83 | # define TW_RELS() (void) sigsetmask(tw_omask) |
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84 | #else /* !BSDSIGS */ |
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85 | # define TW_HOLD() (void) sighold(SIGINT) |
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86 | # define TW_RELS() (void) sigrelse(SIGINT) |
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87 | #endif /* BSDSIGS */ |
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88 | |
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89 | #define SETDIR(dfd) \ |
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90 | { \ |
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91 | tw_dir_fd = dfd; \ |
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92 | if (tw_dir_fd != NULL) \ |
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93 | rewinddir(tw_dir_fd); \ |
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94 | } |
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95 | |
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96 | #define CLRDIR(dfd) \ |
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97 | if (dfd != NULL) { \ |
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98 | TW_HOLD(); \ |
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99 | (void) closedir(dfd); \ |
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100 | dfd = NULL; \ |
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101 | TW_RELS(); \ |
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102 | } |
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103 | |
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104 | static Char *tw_str_add __P((stringlist_t *, int)); |
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105 | static void tw_str_free __P((stringlist_t *)); |
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106 | static Char *tw_dir_next __P((DIR *)); |
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107 | static void tw_cmd_add __P((const Char *name)); |
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108 | static void tw_cmd_cmd __P((void)); |
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109 | static void tw_cmd_builtin __P((void)); |
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110 | static void tw_cmd_alias __P((void)); |
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111 | static void tw_cmd_sort __P((void)); |
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112 | static void tw_vptr_start __P((struct varent *)); |
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113 | |
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114 | |
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115 | /* tw_str_add(): |
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116 | * Add an item to the string list |
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117 | */ |
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118 | static Char * |
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119 | tw_str_add(sl, len) |
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120 | stringlist_t *sl; |
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121 | int len; |
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122 | { |
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123 | Char *ptr; |
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124 | |
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125 | if (sl->tlist <= sl->nlist) { |
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126 | TW_HOLD(); |
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127 | sl->tlist += TW_INCR; |
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128 | sl->list = sl->list ? |
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129 | (Char **) xrealloc((ptr_t) sl->list, |
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130 | (size_t) (sl->tlist * sizeof(Char *))) : |
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131 | (Char **) xmalloc((size_t) (sl->tlist * sizeof(Char *))); |
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132 | TW_RELS(); |
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133 | } |
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134 | if (sl->tbuff <= sl->nbuff + len) { |
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135 | int i; |
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136 | ptr = sl->buff; |
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137 | |
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138 | TW_HOLD(); |
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139 | sl->tbuff += TW_INCR + len; |
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140 | sl->buff = sl->buff ? |
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141 | (Char *) xrealloc((ptr_t) sl->buff, |
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142 | (size_t) (sl->tbuff * sizeof(Char))) : |
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143 | (Char *) xmalloc((size_t) (sl->tbuff * sizeof(Char))); |
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144 | /* Re-thread the new pointer list, if changed */ |
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145 | if (ptr != NULL && ptr != sl->buff) { |
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146 | intptr_t offs = sl->buff - ptr; |
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147 | for (i = 0; i < sl->nlist; i++) |
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148 | sl->list[i] += offs; |
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149 | } |
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150 | TW_RELS(); |
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151 | } |
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152 | ptr = sl->list[sl->nlist++] = &sl->buff[sl->nbuff]; |
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153 | sl->nbuff += len; |
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154 | return ptr; |
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155 | } /* tw_str_add */ |
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156 | |
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157 | |
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158 | /* tw_str_free(): |
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159 | * Free a stringlist |
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160 | */ |
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161 | static void |
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162 | tw_str_free(sl) |
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163 | stringlist_t *sl; |
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164 | { |
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165 | TW_HOLD(); |
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166 | if (sl->list) { |
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167 | xfree((ptr_t) sl->list); |
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168 | sl->list = NULL; |
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169 | sl->tlist = sl->nlist = 0; |
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170 | } |
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171 | if (sl->buff) { |
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172 | xfree((ptr_t) sl->buff); |
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173 | sl->buff = NULL; |
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174 | sl->tbuff = sl->nbuff = 0; |
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175 | } |
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176 | TW_RELS(); |
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177 | } /* end tw_str_free */ |
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178 | |
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179 | |
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180 | static Char * |
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181 | tw_dir_next(dfd) |
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182 | DIR *dfd; |
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183 | { |
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184 | struct dirent *dirp; |
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185 | |
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186 | if (dfd == NULL) |
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187 | return NULL; |
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188 | |
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189 | if ((dirp = readdir(dfd)) != NULL) { |
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190 | (void) Strcpy(tw_retname, str2short(dirp->d_name)); |
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191 | return (tw_retname); |
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192 | } |
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193 | return NULL; |
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194 | } /* end tw_dir_next */ |
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195 | |
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196 | |
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197 | /* tw_cmd_add(): |
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198 | * Add the name to the command list |
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199 | */ |
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200 | static void |
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201 | tw_cmd_add(name) |
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202 | const Char *name; |
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203 | { |
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204 | int len; |
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205 | |
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206 | len = (int) Strlen(name) + 2; |
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207 | (void) Strcpy(tw_str_add(&tw_cmd, len), name); |
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208 | } /* end tw_cmd_add */ |
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209 | |
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210 | |
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211 | /* tw_cmd_free(): |
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212 | * Free the command list |
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213 | */ |
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214 | void |
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215 | tw_cmd_free() |
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216 | { |
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217 | CLRDIR(tw_dir_fd) |
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218 | tw_str_free(&tw_cmd); |
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219 | tw_cmd_got = 0; |
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220 | } /* end tw_cmd_free */ |
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221 | |
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222 | /* tw_cmd_cmd(): |
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223 | * Add system commands to the command list |
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224 | */ |
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225 | static void |
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226 | tw_cmd_cmd() |
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227 | { |
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228 | DIR *dirp; |
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229 | struct dirent *dp; |
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230 | Char *dir = NULL, *name; |
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231 | Char **pv; |
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232 | struct varent *v = adrof(STRpath); |
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233 | struct varent *recexec = adrof(STRrecognize_only_executables); |
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234 | int len; |
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235 | |
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236 | |
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237 | if (v == NULL || v->vec == NULL) /* if no path */ |
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238 | return; |
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239 | |
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240 | for (pv = v->vec; *pv; pv++) { |
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241 | if (pv[0][0] != '/') { |
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242 | tw_cmd_got |= TW_FL_REL; |
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243 | continue; |
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244 | } |
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245 | |
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246 | if ((dirp = opendir(short2str(*pv))) == NULL) |
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247 | continue; |
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248 | |
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249 | if (recexec) |
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250 | dir = Strspl(*pv, STRslash); |
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251 | while ((dp = readdir(dirp)) != NULL) { |
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252 | #if defined(_UWIN) || defined(__CYGWIN__) |
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253 | /* Turn foo.{exe,com,bat} into foo since UWIN's readdir returns |
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254 | * the file with the .exe, .com, .bat extension |
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255 | */ |
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256 | size_t ext = strlen(dp->d_name) - 4; |
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257 | if ((ext > 0) && (strcmp(&dp->d_name[ext], ".exe") == 0 || |
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258 | strcmp(&dp->d_name[ext], ".bat") == 0 || |
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259 | strcmp(&dp->d_name[ext], ".com") == 0)) |
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260 | dp->d_name[ext] = '\0'; |
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261 | #endif /* _UWIN || __CYGWIN__ */ |
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262 | /* the call to executable() may make this a bit slow */ |
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263 | name = str2short(dp->d_name); |
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264 | if (dp->d_ino == 0 || (recexec && !executable(dir, name, 0))) |
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265 | continue; |
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266 | len = (int) Strlen(name) + 2; |
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267 | if (name[0] == '#' || /* emacs temp files */ |
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268 | name[0] == '.' || /* .files */ |
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269 | name[len - 3] == '~' || /* emacs backups */ |
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270 | name[len - 3] == '%') /* textedit backups */ |
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271 | continue; /* Ignore! */ |
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272 | tw_cmd_add(name); |
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273 | } |
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274 | (void) closedir(dirp); |
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275 | if (recexec) |
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276 | xfree((ptr_t) dir); |
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277 | } |
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278 | } /* end tw_cmd_cmd */ |
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279 | |
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280 | |
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281 | /* tw_cmd_builtin(): |
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282 | * Add builtins to the command list |
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283 | */ |
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284 | static void |
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285 | tw_cmd_builtin() |
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286 | { |
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287 | struct biltins *bptr; |
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288 | |
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289 | for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) |
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290 | if (bptr->bname) |
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291 | tw_cmd_add(str2short(bptr->bname)); |
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292 | #ifdef WINNT_NATIVE |
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293 | for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) |
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294 | if (bptr->bname) |
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295 | tw_cmd_add(str2short(bptr->bname)); |
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296 | #endif /* WINNT_NATIVE*/ |
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297 | } /* end tw_cmd_builtin */ |
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298 | |
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299 | |
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300 | /* tw_cmd_alias(): |
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301 | * Add aliases to the command list |
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302 | */ |
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303 | static void |
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304 | tw_cmd_alias() |
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305 | { |
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306 | struct varent *p; |
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307 | struct varent *c; |
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308 | |
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309 | p = &aliases; |
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310 | for (;;) { |
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311 | while (p->v_left) |
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312 | p = p->v_left; |
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313 | x: |
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314 | if (p->v_parent == 0) /* is it the header? */ |
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315 | return; |
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316 | if (p->v_name) |
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317 | tw_cmd_add(p->v_name); |
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318 | if (p->v_right) { |
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319 | p = p->v_right; |
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320 | continue; |
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321 | } |
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322 | do { |
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323 | c = p; |
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324 | p = p->v_parent; |
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325 | } while (p->v_right == c); |
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326 | goto x; |
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327 | } |
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328 | } /* end tw_cmd_alias */ |
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329 | |
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330 | |
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331 | /* tw_cmd_sort(): |
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332 | * Sort the command list removing duplicate elements |
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333 | */ |
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334 | static void |
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335 | tw_cmd_sort() |
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336 | { |
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337 | int fwd, i; |
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338 | |
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339 | TW_HOLD(); |
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340 | /* sort the list. */ |
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341 | qsort((ptr_t) tw_cmd.list, (size_t) tw_cmd.nlist, sizeof(Char *), |
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342 | (int (*) __P((const void *, const void *))) fcompare); |
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343 | |
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344 | /* get rid of multiple entries */ |
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345 | for (i = 0, fwd = 0; i < tw_cmd.nlist - 1; i++) { |
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346 | if (Strcmp(tw_cmd.list[i], tw_cmd.list[i + 1]) == 0) /* garbage */ |
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347 | fwd++; /* increase the forward ref. count */ |
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348 | else if (fwd) |
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349 | tw_cmd.list[i - fwd] = tw_cmd.list[i]; |
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350 | } |
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351 | /* Fix fencepost error -- Theodore Ts'o <tytso@athena.mit.edu> */ |
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352 | if (fwd) |
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353 | tw_cmd.list[i - fwd] = tw_cmd.list[i]; |
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354 | tw_cmd.nlist -= fwd; |
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355 | TW_RELS(); |
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356 | } /* end tw_cmd_sort */ |
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357 | |
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358 | |
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359 | /* tw_cmd_start(): |
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360 | * Get the command list and sort it, if not done yet. |
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361 | * Reset the current pointer to the beginning of the command list |
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362 | */ |
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363 | /*ARGSUSED*/ |
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364 | void |
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365 | tw_cmd_start(dfd, pat) |
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366 | DIR *dfd; |
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367 | Char *pat; |
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368 | { |
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369 | static Char *defpath[] = { STRNULL, 0 }; |
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370 | USE(pat); |
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371 | SETDIR(dfd) |
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372 | if ((tw_cmd_got & TW_FL_CMD) == 0) { |
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373 | tw_cmd_free(); |
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374 | tw_cmd_cmd(); |
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375 | tw_cmd_got |= TW_FL_CMD; |
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376 | } |
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377 | if ((tw_cmd_got & TW_FL_ALIAS) == 0) { |
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378 | tw_cmd_alias(); |
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379 | tw_cmd_got &= ~TW_FL_SORT; |
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380 | tw_cmd_got |= TW_FL_ALIAS; |
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381 | } |
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382 | if ((tw_cmd_got & TW_FL_BUILTIN) == 0) { |
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383 | tw_cmd_builtin(); |
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384 | tw_cmd_got &= ~TW_FL_SORT; |
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385 | tw_cmd_got |= TW_FL_BUILTIN; |
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386 | } |
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387 | if ((tw_cmd_got & TW_FL_SORT) == 0) { |
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388 | tw_cmd_sort(); |
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389 | tw_cmd_got |= TW_FL_SORT; |
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390 | } |
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391 | |
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392 | tw_cmd_state.cur = 0; |
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393 | CLRDIR(tw_cmd_state.dfd) |
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394 | if (tw_cmd_got & TW_FL_REL) { |
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395 | struct varent *vp = adrof(STRpath); |
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396 | if (vp && vp->vec) |
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397 | tw_cmd_state.pathv = vp->vec; |
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398 | else |
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399 | tw_cmd_state.pathv = defpath; |
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400 | } |
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401 | else |
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402 | tw_cmd_state.pathv = defpath; |
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403 | } /* tw_cmd_start */ |
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404 | |
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405 | |
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406 | /* tw_cmd_next(): |
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407 | * Return the next element in the command list or |
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408 | * Look for commands in the relative path components |
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409 | */ |
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410 | Char * |
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411 | tw_cmd_next(dir, flags) |
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412 | Char *dir; |
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413 | int *flags; |
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414 | { |
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415 | Char *ptr = NULL; |
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416 | |
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417 | if (tw_cmd_state.cur < tw_cmd.nlist) { |
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418 | *flags = TW_DIR_OK; |
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419 | return tw_cmd.list[tw_cmd_state.cur++]; |
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420 | } |
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421 | |
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422 | /* |
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423 | * We need to process relatives in the path. |
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424 | */ |
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425 | while (((tw_cmd_state.dfd == NULL) || |
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426 | ((ptr = tw_dir_next(tw_cmd_state.dfd)) == NULL)) && |
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427 | (*tw_cmd_state.pathv != NULL)) { |
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428 | |
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429 | CLRDIR(tw_cmd_state.dfd) |
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430 | |
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431 | while (*tw_cmd_state.pathv && tw_cmd_state.pathv[0][0] == '/') |
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432 | tw_cmd_state.pathv++; |
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433 | if ((ptr = *tw_cmd_state.pathv) != 0) { |
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434 | /* |
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435 | * We complete directories only on '.' should that |
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436 | * be changed? |
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437 | */ |
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438 | if (ptr[0] == '\0' || (ptr[0] == '.' && ptr[1] == '\0')) { |
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439 | *dir = '\0'; |
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440 | tw_cmd_state.dfd = opendir("."); |
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441 | *flags = TW_DIR_OK | TW_EXEC_CHK; |
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442 | } |
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443 | else { |
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444 | copyn(dir, *tw_cmd_state.pathv, FILSIZ); |
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445 | catn(dir, STRslash, FILSIZ); |
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446 | tw_cmd_state.dfd = opendir(short2str(*tw_cmd_state.pathv)); |
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447 | *flags = TW_EXEC_CHK; |
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448 | } |
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449 | tw_cmd_state.pathv++; |
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450 | } |
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451 | } |
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452 | return ptr; |
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453 | } /* end tw_cmd_next */ |
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454 | |
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455 | |
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456 | /* tw_vptr_start(): |
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457 | * Find the first variable in the variable list |
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458 | */ |
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459 | static void |
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460 | tw_vptr_start(c) |
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461 | struct varent *c; |
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462 | { |
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463 | tw_vptr = c; /* start at beginning of variable list */ |
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464 | |
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465 | for (;;) { |
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466 | while (tw_vptr->v_left) |
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467 | tw_vptr = tw_vptr->v_left; |
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468 | x: |
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469 | if (tw_vptr->v_parent == 0) { /* is it the header? */ |
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470 | tw_vptr = NULL; |
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471 | return; |
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472 | } |
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473 | if (tw_vptr->v_name) |
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474 | return; /* found first one */ |
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475 | if (tw_vptr->v_right) { |
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476 | tw_vptr = tw_vptr->v_right; |
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477 | continue; |
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478 | } |
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479 | do { |
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480 | c = tw_vptr; |
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481 | tw_vptr = tw_vptr->v_parent; |
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482 | } while (tw_vptr->v_right == c); |
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483 | goto x; |
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484 | } |
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485 | } /* end tw_shvar_start */ |
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486 | |
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487 | |
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488 | /* tw_shvar_next(): |
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489 | * Return the next shell variable |
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490 | */ |
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491 | /*ARGSUSED*/ |
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492 | Char * |
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493 | tw_shvar_next(dir, flags) |
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494 | Char *dir; |
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495 | int *flags; |
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496 | { |
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497 | struct varent *p; |
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498 | struct varent *c; |
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499 | Char *cp; |
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500 | |
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501 | USE(flags); |
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502 | USE(dir); |
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503 | if ((p = tw_vptr) == NULL) |
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504 | return (NULL); /* just in case */ |
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505 | |
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506 | cp = p->v_name; /* we know that this name is here now */ |
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507 | |
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508 | /* now find the next one */ |
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509 | for (;;) { |
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510 | if (p->v_right) { /* if we can go right */ |
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511 | p = p->v_right; |
---|
512 | while (p->v_left) |
---|
513 | p = p->v_left; |
---|
514 | } |
---|
515 | else { /* else go up */ |
---|
516 | do { |
---|
517 | c = p; |
---|
518 | p = p->v_parent; |
---|
519 | } while (p->v_right == c); |
---|
520 | } |
---|
521 | if (p->v_parent == 0) { /* is it the header? */ |
---|
522 | tw_vptr = NULL; |
---|
523 | return (cp); |
---|
524 | } |
---|
525 | if (p->v_name) { |
---|
526 | tw_vptr = p; /* save state for the next call */ |
---|
527 | return (cp); |
---|
528 | } |
---|
529 | } |
---|
530 | } /* end tw_shvar_next */ |
---|
531 | |
---|
532 | |
---|
533 | /* tw_envvar_next(): |
---|
534 | * Return the next environment variable |
---|
535 | */ |
---|
536 | /*ARGSUSED*/ |
---|
537 | Char * |
---|
538 | tw_envvar_next(dir, flags) |
---|
539 | Char *dir; |
---|
540 | int *flags; |
---|
541 | { |
---|
542 | Char *ps, *pd; |
---|
543 | |
---|
544 | USE(flags); |
---|
545 | USE(dir); |
---|
546 | if (tw_env == NULL || *tw_env == NULL) |
---|
547 | return (NULL); |
---|
548 | for (ps = *tw_env, pd = tw_retname; |
---|
549 | *ps && *ps != '=' && pd <= &tw_retname[MAXPATHLEN]; *pd++ = *ps++) |
---|
550 | continue; |
---|
551 | *pd = '\0'; |
---|
552 | tw_env++; |
---|
553 | return (tw_retname); |
---|
554 | } /* end tw_envvar_next */ |
---|
555 | |
---|
556 | |
---|
557 | /* tw_var_start(): |
---|
558 | * Begin the list of the shell and environment variables |
---|
559 | */ |
---|
560 | /*ARGSUSED*/ |
---|
561 | void |
---|
562 | tw_var_start(dfd, pat) |
---|
563 | DIR *dfd; |
---|
564 | Char *pat; |
---|
565 | { |
---|
566 | USE(pat); |
---|
567 | SETDIR(dfd) |
---|
568 | tw_vptr_start(&shvhed); |
---|
569 | tw_env = STR_environ; |
---|
570 | } /* end tw_var_start */ |
---|
571 | |
---|
572 | |
---|
573 | /* tw_alias_start(): |
---|
574 | * Begin the list of the shell aliases |
---|
575 | */ |
---|
576 | /*ARGSUSED*/ |
---|
577 | void |
---|
578 | tw_alias_start(dfd, pat) |
---|
579 | DIR *dfd; |
---|
580 | Char *pat; |
---|
581 | { |
---|
582 | USE(pat); |
---|
583 | SETDIR(dfd) |
---|
584 | tw_vptr_start(&aliases); |
---|
585 | tw_env = NULL; |
---|
586 | } /* tw_alias_start */ |
---|
587 | |
---|
588 | |
---|
589 | /* tw_complete_start(): |
---|
590 | * Begin the list of completions |
---|
591 | */ |
---|
592 | /*ARGSUSED*/ |
---|
593 | void |
---|
594 | tw_complete_start(dfd, pat) |
---|
595 | DIR *dfd; |
---|
596 | Char *pat; |
---|
597 | { |
---|
598 | USE(pat); |
---|
599 | SETDIR(dfd) |
---|
600 | tw_vptr_start(&completions); |
---|
601 | tw_env = NULL; |
---|
602 | } /* end tw_complete_start */ |
---|
603 | |
---|
604 | |
---|
605 | /* tw_var_next(): |
---|
606 | * Return the next shell or environment variable |
---|
607 | */ |
---|
608 | Char * |
---|
609 | tw_var_next(dir, flags) |
---|
610 | Char *dir; |
---|
611 | int *flags; |
---|
612 | { |
---|
613 | Char *ptr = NULL; |
---|
614 | |
---|
615 | if (tw_vptr) |
---|
616 | ptr = tw_shvar_next(dir, flags); |
---|
617 | if (!ptr && tw_env) |
---|
618 | ptr = tw_envvar_next(dir, flags); |
---|
619 | return ptr; |
---|
620 | } /* end tw_var_next */ |
---|
621 | |
---|
622 | |
---|
623 | /* tw_logname_start(): |
---|
624 | * Initialize lognames to the beginning of the list |
---|
625 | */ |
---|
626 | /*ARGSUSED*/ |
---|
627 | void |
---|
628 | tw_logname_start(dfd, pat) |
---|
629 | DIR *dfd; |
---|
630 | Char *pat; |
---|
631 | { |
---|
632 | USE(pat); |
---|
633 | SETDIR(dfd) |
---|
634 | #ifdef HAVE_GETPWENT |
---|
635 | (void) setpwent(); /* Open passwd file */ |
---|
636 | #endif |
---|
637 | } /* end tw_logname_start */ |
---|
638 | |
---|
639 | |
---|
640 | /* tw_logname_next(): |
---|
641 | * Return the next entry from the passwd file |
---|
642 | */ |
---|
643 | /*ARGSUSED*/ |
---|
644 | Char * |
---|
645 | tw_logname_next(dir, flags) |
---|
646 | Char *dir; |
---|
647 | int *flags; |
---|
648 | { |
---|
649 | static Char retname[MAXPATHLEN]; |
---|
650 | struct passwd *pw; |
---|
651 | /* |
---|
652 | * We don't want to get interrupted inside getpwent() |
---|
653 | * because the yellow pages code is not interruptible, |
---|
654 | * and if we call endpwent() immediatetely after |
---|
655 | * (in pintr()) we may be freeing an invalid pointer |
---|
656 | */ |
---|
657 | USE(flags); |
---|
658 | USE(dir); |
---|
659 | TW_HOLD(); |
---|
660 | #ifdef HAVE_GETPWENT |
---|
661 | pw = getpwent(); |
---|
662 | #else |
---|
663 | pw = NULL; |
---|
664 | #endif |
---|
665 | TW_RELS(); |
---|
666 | |
---|
667 | if (pw == NULL) { |
---|
668 | #ifdef YPBUGS |
---|
669 | fix_yp_bugs(); |
---|
670 | #endif |
---|
671 | return (NULL); |
---|
672 | } |
---|
673 | (void) Strcpy(retname, str2short(pw->pw_name)); |
---|
674 | return (retname); |
---|
675 | } /* end tw_logname_next */ |
---|
676 | |
---|
677 | |
---|
678 | /* tw_logname_end(): |
---|
679 | * Close the passwd file to finish the logname list |
---|
680 | */ |
---|
681 | void |
---|
682 | tw_logname_end() |
---|
683 | { |
---|
684 | #ifdef YPBUGS |
---|
685 | fix_yp_bugs(); |
---|
686 | #endif |
---|
687 | #ifdef HAVE_GETPWENT |
---|
688 | (void) endpwent(); |
---|
689 | #endif |
---|
690 | } /* end tw_logname_end */ |
---|
691 | |
---|
692 | |
---|
693 | /* tw_grpname_start(): |
---|
694 | * Initialize grpnames to the beginning of the list |
---|
695 | */ |
---|
696 | /*ARGSUSED*/ |
---|
697 | void |
---|
698 | tw_grpname_start(dfd, pat) |
---|
699 | DIR *dfd; |
---|
700 | Char *pat; |
---|
701 | { |
---|
702 | USE(pat); |
---|
703 | SETDIR(dfd) |
---|
704 | #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) |
---|
705 | (void) setgrent(); /* Open group file */ |
---|
706 | #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ |
---|
707 | } /* end tw_grpname_start */ |
---|
708 | |
---|
709 | |
---|
710 | /* tw_grpname_next(): |
---|
711 | * Return the next entry from the group file |
---|
712 | */ |
---|
713 | /*ARGSUSED*/ |
---|
714 | Char * |
---|
715 | tw_grpname_next(dir, flags) |
---|
716 | Char *dir; |
---|
717 | int *flags; |
---|
718 | { |
---|
719 | static Char retname[MAXPATHLEN]; |
---|
720 | struct group *gr; |
---|
721 | /* |
---|
722 | * We don't want to get interrupted inside getgrent() |
---|
723 | * because the yellow pages code is not interruptible, |
---|
724 | * and if we call endgrent() immediatetely after |
---|
725 | * (in pintr()) we may be freeing an invalid pointer |
---|
726 | */ |
---|
727 | USE(flags); |
---|
728 | USE(dir); |
---|
729 | TW_HOLD(); |
---|
730 | #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) |
---|
731 | gr = (struct group *) getgrent(); |
---|
732 | #else /* _VMS_POSIX || _OSD_POSIX || WINNT_NATIVE */ |
---|
733 | gr = NULL; |
---|
734 | #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ |
---|
735 | TW_RELS(); |
---|
736 | |
---|
737 | if (gr == NULL) { |
---|
738 | #ifdef YPBUGS |
---|
739 | fix_yp_bugs(); |
---|
740 | #endif |
---|
741 | return (NULL); |
---|
742 | } |
---|
743 | (void) Strcpy(retname, str2short(gr->gr_name)); |
---|
744 | return (retname); |
---|
745 | } /* end tw_grpname_next */ |
---|
746 | |
---|
747 | |
---|
748 | /* tw_grpname_end(): |
---|
749 | * Close the group file to finish the groupname list |
---|
750 | */ |
---|
751 | void |
---|
752 | tw_grpname_end() |
---|
753 | { |
---|
754 | #ifdef YPBUGS |
---|
755 | fix_yp_bugs(); |
---|
756 | #endif |
---|
757 | #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) |
---|
758 | (void) endgrent(); |
---|
759 | #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ |
---|
760 | } /* end tw_grpname_end */ |
---|
761 | |
---|
762 | /* tw_file_start(): |
---|
763 | * Initialize the directory for the file list |
---|
764 | */ |
---|
765 | /*ARGSUSED*/ |
---|
766 | void |
---|
767 | tw_file_start(dfd, pat) |
---|
768 | DIR *dfd; |
---|
769 | Char *pat; |
---|
770 | { |
---|
771 | struct varent *vp; |
---|
772 | USE(pat); |
---|
773 | SETDIR(dfd) |
---|
774 | if ((vp = adrof(STRcdpath)) != NULL) |
---|
775 | tw_env = vp->vec; |
---|
776 | } /* end tw_file_start */ |
---|
777 | |
---|
778 | |
---|
779 | /* tw_file_next(): |
---|
780 | * Return the next file in the directory |
---|
781 | */ |
---|
782 | Char * |
---|
783 | tw_file_next(dir, flags) |
---|
784 | Char *dir; |
---|
785 | int *flags; |
---|
786 | { |
---|
787 | Char *ptr = tw_dir_next(tw_dir_fd); |
---|
788 | if (ptr == NULL && (*flags & TW_DIR_OK) != 0) { |
---|
789 | CLRDIR(tw_dir_fd) |
---|
790 | while (tw_env && *tw_env) |
---|
791 | if ((tw_dir_fd = opendir(short2str(*tw_env))) != NULL) |
---|
792 | break; |
---|
793 | else |
---|
794 | tw_env++; |
---|
795 | |
---|
796 | if (tw_dir_fd) { |
---|
797 | copyn(dir, *tw_env++, MAXPATHLEN); |
---|
798 | catn(dir, STRslash, MAXPATHLEN); |
---|
799 | ptr = tw_dir_next(tw_dir_fd); |
---|
800 | } |
---|
801 | } |
---|
802 | return ptr; |
---|
803 | } /* end tw_file_next */ |
---|
804 | |
---|
805 | |
---|
806 | /* tw_dir_end(): |
---|
807 | * Clear directory related lists |
---|
808 | */ |
---|
809 | void |
---|
810 | tw_dir_end() |
---|
811 | { |
---|
812 | CLRDIR(tw_dir_fd) |
---|
813 | CLRDIR(tw_cmd_state.dfd) |
---|
814 | } /* end tw_dir_end */ |
---|
815 | |
---|
816 | |
---|
817 | /* tw_item_free(): |
---|
818 | * Free the item list |
---|
819 | */ |
---|
820 | void |
---|
821 | tw_item_free() |
---|
822 | { |
---|
823 | tw_str_free(&tw_item); |
---|
824 | } /* end tw_item_free */ |
---|
825 | |
---|
826 | |
---|
827 | /* tw_item_get(): |
---|
828 | * Return the list of items |
---|
829 | */ |
---|
830 | Char ** |
---|
831 | tw_item_get() |
---|
832 | { |
---|
833 | return tw_item.list; |
---|
834 | } /* end tw_item_get */ |
---|
835 | |
---|
836 | |
---|
837 | /* tw_item_add(): |
---|
838 | * Return a new item |
---|
839 | */ |
---|
840 | Char * |
---|
841 | tw_item_add(len) |
---|
842 | int len; |
---|
843 | { |
---|
844 | return tw_str_add(&tw_item, len); |
---|
845 | } /* tw_item_add */ |
---|
846 | |
---|
847 | |
---|
848 | /* tw_item_find(): |
---|
849 | * Find the string if it exists in the item list |
---|
850 | * end return it. |
---|
851 | */ |
---|
852 | Char * |
---|
853 | tw_item_find(str) |
---|
854 | Char *str; |
---|
855 | { |
---|
856 | int i; |
---|
857 | |
---|
858 | if (tw_item.list == NULL || str == NULL) |
---|
859 | return NULL; |
---|
860 | |
---|
861 | for (i = 0; i < tw_item.nlist; i++) |
---|
862 | if (tw_item.list[i] != NULL && Strcmp(tw_item.list[i], str) == 0) |
---|
863 | return tw_item.list[i]; |
---|
864 | return NULL; |
---|
865 | } /* end tw_item_find */ |
---|
866 | |
---|
867 | |
---|
868 | /* tw_vl_start(): |
---|
869 | * Initialize a variable list |
---|
870 | */ |
---|
871 | void |
---|
872 | tw_vl_start(dfd, pat) |
---|
873 | DIR *dfd; |
---|
874 | Char *pat; |
---|
875 | { |
---|
876 | SETDIR(dfd) |
---|
877 | if ((tw_vptr = adrof(pat)) != NULL) { |
---|
878 | tw_env = tw_vptr->vec; |
---|
879 | tw_vptr = NULL; |
---|
880 | } |
---|
881 | else |
---|
882 | tw_env = NULL; |
---|
883 | } /* end tw_vl_start */ |
---|
884 | |
---|
885 | |
---|
886 | /* |
---|
887 | * Initialize a word list |
---|
888 | */ |
---|
889 | void |
---|
890 | tw_wl_start(dfd, pat) |
---|
891 | DIR *dfd; |
---|
892 | Char *pat; |
---|
893 | { |
---|
894 | SETDIR(dfd); |
---|
895 | tw_word = pat; |
---|
896 | } /* end tw_wl_start */ |
---|
897 | |
---|
898 | |
---|
899 | /* |
---|
900 | * Return the next word from the word list |
---|
901 | */ |
---|
902 | /*ARGSUSED*/ |
---|
903 | Char * |
---|
904 | tw_wl_next(dir, flags) |
---|
905 | Char *dir; |
---|
906 | int *flags; |
---|
907 | { |
---|
908 | USE(flags); |
---|
909 | if (tw_word == NULL || tw_word[0] == '\0') |
---|
910 | return NULL; |
---|
911 | |
---|
912 | while (*tw_word && Isspace(*tw_word)) tw_word++; |
---|
913 | |
---|
914 | for (dir = tw_word; *tw_word && !Isspace(*tw_word); tw_word++) |
---|
915 | continue; |
---|
916 | if (*tw_word) |
---|
917 | *tw_word++ = '\0'; |
---|
918 | return *dir ? dir : NULL; |
---|
919 | } /* end tw_wl_next */ |
---|
920 | |
---|
921 | |
---|
922 | /* tw_bind_start(): |
---|
923 | * Begin the list of the shell bindings |
---|
924 | */ |
---|
925 | /*ARGSUSED*/ |
---|
926 | void |
---|
927 | tw_bind_start(dfd, pat) |
---|
928 | DIR *dfd; |
---|
929 | Char *pat; |
---|
930 | { |
---|
931 | USE(pat); |
---|
932 | SETDIR(dfd) |
---|
933 | tw_bind = FuncNames; |
---|
934 | } /* end tw_bind_start */ |
---|
935 | |
---|
936 | |
---|
937 | /* tw_bind_next(): |
---|
938 | * Begin the list of the shell bindings |
---|
939 | */ |
---|
940 | /*ARGSUSED*/ |
---|
941 | Char * |
---|
942 | tw_bind_next(dir, flags) |
---|
943 | Char *dir; |
---|
944 | int *flags; |
---|
945 | { |
---|
946 | const char *ptr; |
---|
947 | USE(flags); |
---|
948 | if (tw_bind && tw_bind->name) { |
---|
949 | for (ptr = tw_bind->name, dir = tw_retname; |
---|
950 | (*dir++ = (Char) *ptr++) != '\0';) |
---|
951 | continue; |
---|
952 | tw_bind++; |
---|
953 | return(tw_retname); |
---|
954 | } |
---|
955 | return NULL; |
---|
956 | } /* end tw_bind_next */ |
---|
957 | |
---|
958 | |
---|
959 | /* tw_limit_start(): |
---|
960 | * Begin the list of the shell limitings |
---|
961 | */ |
---|
962 | /*ARGSUSED*/ |
---|
963 | void |
---|
964 | tw_limit_start(dfd, pat) |
---|
965 | DIR *dfd; |
---|
966 | Char *pat; |
---|
967 | { |
---|
968 | USE(pat); |
---|
969 | SETDIR(dfd) |
---|
970 | #ifndef HAVENOLIMIT |
---|
971 | tw_limit = limits; |
---|
972 | #endif /* ! HAVENOLIMIT */ |
---|
973 | } /* end tw_limit_start */ |
---|
974 | |
---|
975 | |
---|
976 | /* tw_limit_next(): |
---|
977 | * Begin the list of the shell limitings |
---|
978 | */ |
---|
979 | /*ARGSUSED*/ |
---|
980 | Char * |
---|
981 | tw_limit_next(dir, flags) |
---|
982 | Char *dir; |
---|
983 | int *flags; |
---|
984 | { |
---|
985 | #ifndef HAVENOLIMIT |
---|
986 | const char *ptr; |
---|
987 | if (tw_limit && tw_limit->limname) { |
---|
988 | for (ptr = tw_limit->limname, dir = tw_retname; |
---|
989 | (*dir++ = (Char) *ptr++) != '\0';) |
---|
990 | continue; |
---|
991 | tw_limit++; |
---|
992 | return(tw_retname); |
---|
993 | } |
---|
994 | #endif /* ! HAVENOLIMIT */ |
---|
995 | USE(flags); |
---|
996 | return NULL; |
---|
997 | } /* end tw_limit_next */ |
---|
998 | |
---|
999 | |
---|
1000 | /* tw_sig_start(): |
---|
1001 | * Begin the list of the shell sigings |
---|
1002 | */ |
---|
1003 | /*ARGSUSED*/ |
---|
1004 | void |
---|
1005 | tw_sig_start(dfd, pat) |
---|
1006 | DIR *dfd; |
---|
1007 | Char *pat; |
---|
1008 | { |
---|
1009 | USE(pat); |
---|
1010 | SETDIR(dfd) |
---|
1011 | tw_index = 0; |
---|
1012 | } /* end tw_sig_start */ |
---|
1013 | |
---|
1014 | |
---|
1015 | /* tw_sig_next(): |
---|
1016 | * Begin the list of the shell sigings |
---|
1017 | */ |
---|
1018 | /*ARGSUSED*/ |
---|
1019 | Char * |
---|
1020 | tw_sig_next(dir, flags) |
---|
1021 | Char *dir; |
---|
1022 | int *flags; |
---|
1023 | { |
---|
1024 | const char *ptr; |
---|
1025 | USE(flags); |
---|
1026 | for (;tw_index < nsig; tw_index++) { |
---|
1027 | |
---|
1028 | if (mesg[tw_index].iname == NULL) |
---|
1029 | continue; |
---|
1030 | |
---|
1031 | for (ptr = mesg[tw_index].iname, dir = tw_retname; |
---|
1032 | (*dir++ = (Char) *ptr++) != '\0';) |
---|
1033 | continue; |
---|
1034 | tw_index++; |
---|
1035 | return(tw_retname); |
---|
1036 | } |
---|
1037 | return NULL; |
---|
1038 | } /* end tw_sig_next */ |
---|
1039 | |
---|
1040 | |
---|
1041 | /* tw_job_start(): |
---|
1042 | * Begin the list of the shell jobings |
---|
1043 | */ |
---|
1044 | /*ARGSUSED*/ |
---|
1045 | void |
---|
1046 | tw_job_start(dfd, pat) |
---|
1047 | DIR *dfd; |
---|
1048 | Char *pat; |
---|
1049 | { |
---|
1050 | USE(pat); |
---|
1051 | SETDIR(dfd) |
---|
1052 | tw_index = 1; |
---|
1053 | } /* end tw_job_start */ |
---|
1054 | |
---|
1055 | |
---|
1056 | /* tw_job_next(): |
---|
1057 | * Begin the list of the shell jobings |
---|
1058 | */ |
---|
1059 | /*ARGSUSED*/ |
---|
1060 | Char * |
---|
1061 | tw_job_next(dir, flags) |
---|
1062 | Char *dir; |
---|
1063 | int *flags; |
---|
1064 | { |
---|
1065 | Char *ptr; |
---|
1066 | struct process *j; |
---|
1067 | |
---|
1068 | USE(flags); |
---|
1069 | for (;tw_index <= pmaxindex; tw_index++) { |
---|
1070 | for (j = proclist.p_next; j != NULL; j = j->p_next) |
---|
1071 | if (j->p_index == tw_index && j->p_procid == j->p_jobid) |
---|
1072 | break; |
---|
1073 | if (j == NULL) |
---|
1074 | continue; |
---|
1075 | for (ptr = j->p_command, dir = tw_retname; (*dir++ = *ptr++) != '\0';) |
---|
1076 | continue; |
---|
1077 | *dir = '\0'; |
---|
1078 | tw_index++; |
---|
1079 | return(tw_retname); |
---|
1080 | } |
---|
1081 | return NULL; |
---|
1082 | } /* end tw_job_next */ |
---|