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510 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
510 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1888 | jermar | 29 | /** @addtogroup genericconsole |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | |||
1264 | jermar | 33 | /** |
34 | * @file kconsole.c |
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35 | * @brief Kernel console. |
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36 | * |
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37 | * This file contains kernel thread managing the kernel console. |
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38 | */ |
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39 | |||
518 | jermar | 40 | #include <console/kconsole.h> |
510 | jermar | 41 | #include <console/console.h> |
42 | #include <console/chardev.h> |
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596 | jermar | 43 | #include <console/cmd.h> |
510 | jermar | 44 | #include <print.h> |
517 | jermar | 45 | #include <panic.h> |
510 | jermar | 46 | #include <arch/types.h> |
788 | jermar | 47 | #include <adt/list.h> |
517 | jermar | 48 | #include <arch.h> |
49 | #include <macros.h> |
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518 | jermar | 50 | #include <debug.h> |
596 | jermar | 51 | #include <func.h> |
582 | palkovsky | 52 | #include <symtab.h> |
609 | palkovsky | 53 | #include <macros.h> |
510 | jermar | 54 | |
517 | jermar | 55 | /** Simple kernel console. |
56 | * |
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57 | * The console is realized by kernel thread kconsole. |
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518 | jermar | 58 | * It doesn't understand any useful command on its own, |
59 | * but makes it possible for other kernel subsystems to |
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517 | jermar | 60 | * register their own commands. |
61 | */ |
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62 | |||
63 | /** Locking. |
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64 | * |
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65 | * There is a list of cmd_info_t structures. This list |
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66 | * is protected by cmd_lock spinlock. Note that specially |
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67 | * the link elements of cmd_info_t are protected by |
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68 | * this lock. |
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69 | * |
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70 | * Each cmd_info_t also has its own lock, which protects |
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71 | * all elements thereof except the link element. |
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72 | * |
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73 | * cmd_lock must be acquired before any cmd_info lock. |
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74 | * When locking two cmd info structures, structure with |
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75 | * lower address must be locked first. |
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76 | */ |
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77 | |||
623 | jermar | 78 | SPINLOCK_INITIALIZE(cmd_lock); /**< Lock protecting command list. */ |
624 | jermar | 79 | LIST_INITIALIZE(cmd_head); /**< Command list. */ |
517 | jermar | 80 | |
81 | static cmd_info_t *parse_cmdline(char *cmdline, size_t len); |
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2108 | jermar | 82 | static bool parse_argument(char *cmdline, size_t len, index_t *start, |
83 | index_t *end); |
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601 | palkovsky | 84 | static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {}; |
517 | jermar | 85 | |
86 | /** Initialize kconsole data structures. */ |
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87 | void kconsole_init(void) |
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88 | { |
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601 | palkovsky | 89 | int i; |
90 | |||
596 | jermar | 91 | cmd_init(); |
2108 | jermar | 92 | for (i = 0; i < KCONSOLE_HISTORY; i++) |
601 | palkovsky | 93 | history[i][0] = '\0'; |
517 | jermar | 94 | } |
95 | |||
96 | |||
97 | /** Register kconsole command. |
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98 | * |
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99 | * @param cmd Structure describing the command. |
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100 | * |
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101 | * @return 0 on failure, 1 on success. |
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102 | */ |
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103 | int cmd_register(cmd_info_t *cmd) |
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104 | { |
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105 | link_t *cur; |
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106 | |||
107 | spinlock_lock(&cmd_lock); |
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108 | |||
109 | /* |
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110 | * Make sure the command is not already listed. |
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111 | */ |
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112 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
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113 | cmd_info_t *hlp; |
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114 | |||
115 | hlp = list_get_instance(cur, cmd_info_t, link); |
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116 | |||
117 | if (hlp == cmd) { |
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118 | /* The command is already there. */ |
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119 | spinlock_unlock(&cmd_lock); |
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120 | return 0; |
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121 | } |
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122 | |||
123 | /* Avoid deadlock. */ |
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124 | if (hlp < cmd) { |
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125 | spinlock_lock(&hlp->lock); |
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126 | spinlock_lock(&cmd->lock); |
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127 | } else { |
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128 | spinlock_lock(&cmd->lock); |
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129 | spinlock_lock(&hlp->lock); |
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130 | } |
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2108 | jermar | 131 | if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name), |
132 | strlen(hlp->name))) == 0)) { |
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517 | jermar | 133 | /* The command is already there. */ |
134 | spinlock_unlock(&hlp->lock); |
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135 | spinlock_unlock(&cmd->lock); |
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136 | spinlock_unlock(&cmd_lock); |
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137 | return 0; |
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138 | } |
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139 | |||
140 | spinlock_unlock(&hlp->lock); |
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141 | spinlock_unlock(&cmd->lock); |
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142 | } |
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143 | |||
144 | /* |
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145 | * Now the command can be added. |
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146 | */ |
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147 | list_append(&cmd->link, &cmd_head); |
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148 | |||
149 | spinlock_unlock(&cmd_lock); |
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150 | return 1; |
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151 | } |
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152 | |||
635 | palkovsky | 153 | /** Print count times a character */ |
601 | palkovsky | 154 | static void rdln_print_c(char ch, int count) |
155 | { |
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156 | int i; |
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2108 | jermar | 157 | for (i = 0; i < count; i++) |
601 | palkovsky | 158 | putchar(ch); |
159 | } |
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160 | |||
635 | palkovsky | 161 | /** Insert character to string */ |
601 | palkovsky | 162 | static void insert_char(char *str, char ch, int pos) |
163 | { |
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164 | int i; |
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165 | |||
2108 | jermar | 166 | for (i = strlen(str); i > pos; i--) |
167 | str[i] = str[i - 1]; |
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601 | palkovsky | 168 | str[pos] = ch; |
169 | } |
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170 | |||
640 | jermar | 171 | /** Try to find a command beginning with prefix */ |
601 | palkovsky | 172 | static const char * cmdtab_search_one(const char *name,link_t **startpos) |
173 | { |
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2113 | decky | 174 | size_t namelen = strlen(name); |
601 | palkovsky | 175 | const char *curname; |
176 | |||
177 | spinlock_lock(&cmd_lock); |
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178 | |||
179 | if (!*startpos) |
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180 | *startpos = cmd_head.next; |
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181 | |||
2108 | jermar | 182 | for (; *startpos != &cmd_head; *startpos = (*startpos)->next) { |
601 | palkovsky | 183 | cmd_info_t *hlp; |
184 | hlp = list_get_instance(*startpos, cmd_info_t, link); |
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185 | |||
186 | curname = hlp->name; |
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187 | if (strlen(curname) < namelen) |
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188 | continue; |
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189 | if (strncmp(curname, name, namelen) == 0) { |
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190 | spinlock_unlock(&cmd_lock); |
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191 | return curname+namelen; |
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192 | } |
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193 | } |
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194 | spinlock_unlock(&cmd_lock); |
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195 | return NULL; |
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196 | } |
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197 | |||
198 | |||
199 | /** Command completion of the commands |
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200 | * |
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201 | * @param name - string to match, changed to hint on exit |
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202 | * @return number of found matches |
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203 | */ |
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204 | static int cmdtab_compl(char *name) |
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205 | { |
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1972 | jermar | 206 | static char output[MAX_SYMBOL_NAME+1]; |
601 | palkovsky | 207 | link_t *startpos = NULL; |
208 | const char *foundtxt; |
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209 | int found = 0; |
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210 | int i; |
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211 | |||
212 | output[0] = '\0'; |
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213 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
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214 | startpos = startpos->next; |
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215 | if (!found) |
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216 | strncpy(output, foundtxt, strlen(foundtxt)+1); |
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217 | else { |
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2108 | jermar | 218 | for (i = 0; output[i] && foundtxt[i] && |
219 | output[i] == foundtxt[i]; i++) |
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601 | palkovsky | 220 | ; |
221 | output[i] = '\0'; |
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222 | } |
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223 | found++; |
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224 | } |
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225 | if (!found) |
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226 | return 0; |
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227 | |||
602 | palkovsky | 228 | if (found > 1 && !strlen(output)) { |
601 | palkovsky | 229 | printf("\n"); |
230 | startpos = NULL; |
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231 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
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232 | cmd_info_t *hlp; |
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233 | hlp = list_get_instance(startpos, cmd_info_t, link); |
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234 | printf("%s - %s\n", hlp->name, hlp->description); |
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235 | startpos = startpos->next; |
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236 | } |
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237 | } |
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238 | strncpy(name, output, MAX_SYMBOL_NAME); |
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239 | return found; |
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240 | |||
241 | } |
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242 | |||
243 | static char * clever_readline(const char *prompt, chardev_t *input) |
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244 | { |
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245 | static int histposition = 0; |
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246 | |||
1972 | jermar | 247 | static char tmp[MAX_CMDLINE+1]; |
601 | palkovsky | 248 | int curlen = 0, position = 0; |
249 | char *current = history[histposition]; |
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250 | int i; |
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606 | palkovsky | 251 | char mod; /* Command Modifier */ |
601 | palkovsky | 252 | char c; |
253 | |||
254 | printf("%s> ", prompt); |
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255 | while (1) { |
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256 | c = _getc(input); |
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257 | if (c == '\n') { |
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258 | putchar(c); |
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259 | break; |
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607 | palkovsky | 260 | } if (c == '\b') { /* Backspace */ |
601 | palkovsky | 261 | if (position == 0) |
262 | continue; |
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2108 | jermar | 263 | for (i = position; i < curlen; i++) |
264 | current[i - 1] = current[i]; |
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601 | palkovsky | 265 | curlen--; |
266 | position--; |
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267 | putchar('\b'); |
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2108 | jermar | 268 | for (i = position; i < curlen; i++) |
601 | palkovsky | 269 | putchar(current[i]); |
270 | putchar(' '); |
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2108 | jermar | 271 | rdln_print_c('\b', curlen - position + 1); |
601 | palkovsky | 272 | continue; |
273 | } |
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607 | palkovsky | 274 | if (c == '\t') { /* Tabulator */ |
601 | palkovsky | 275 | int found; |
276 | |||
277 | /* Move to the end of the word */ |
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2108 | jermar | 278 | for (; position < curlen && current[position] != ' '; |
279 | position++) |
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601 | palkovsky | 280 | putchar(current[position]); |
281 | /* Copy to tmp last word */ |
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2108 | jermar | 282 | for (i = position - 1; i >= 0 && current[i] != ' '; i--) |
601 | palkovsky | 283 | ; |
284 | /* If word begins with * or &, skip it */ |
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285 | if (tmp[0] == '*' || tmp[0] == '&') |
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2108 | jermar | 286 | for (i = 1; tmp[i]; i++) |
287 | tmp[i - 1] = tmp[i]; |
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601 | palkovsky | 288 | i++; /* I is at the start of the word */ |
2108 | jermar | 289 | strncpy(tmp, current + i, position - i + 1); |
601 | palkovsky | 290 | |
2108 | jermar | 291 | if (i == 0) { /* Command completion */ |
601 | palkovsky | 292 | found = cmdtab_compl(tmp); |
293 | } else { /* Symtab completion */ |
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294 | found = symtab_compl(tmp); |
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295 | } |
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296 | |||
297 | if (found == 0) |
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298 | continue; |
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2108 | jermar | 299 | for (i = 0; tmp[i] && curlen < MAX_CMDLINE; |
300 | i++, curlen++) |
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301 | insert_char(current, tmp[i], i + position); |
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602 | palkovsky | 302 | |
2108 | jermar | 303 | if (strlen(tmp) || found == 1) { /* If we have a hint */ |
304 | for (i = position; i < curlen; i++) |
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601 | palkovsky | 305 | putchar(current[i]); |
306 | position += strlen(tmp); |
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307 | /* Add space to end */ |
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2108 | jermar | 308 | if (found == 1 && position == curlen && |
602 | palkovsky | 309 | curlen < MAX_CMDLINE) { |
601 | palkovsky | 310 | current[position] = ' '; |
311 | curlen++; |
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312 | position++; |
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313 | putchar(' '); |
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314 | } |
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602 | palkovsky | 315 | } else { /* No hint, table was printed */ |
601 | palkovsky | 316 | printf("%s> ", prompt); |
2108 | jermar | 317 | for (i = 0; i < curlen; i++) |
601 | palkovsky | 318 | putchar(current[i]); |
319 | position += strlen(tmp); |
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320 | } |
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2108 | jermar | 321 | rdln_print_c('\b', curlen - position); |
601 | palkovsky | 322 | continue; |
323 | } |
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607 | palkovsky | 324 | if (c == 0x1b) { /* Special command */ |
606 | palkovsky | 325 | mod = _getc(input); |
601 | palkovsky | 326 | c = _getc(input); |
606 | palkovsky | 327 | |
328 | if (mod != 0x5b && mod != 0x4f) |
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601 | palkovsky | 329 | continue; |
606 | palkovsky | 330 | |
331 | if (c == 0x33 && _getc(input) == 0x7e) { |
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607 | palkovsky | 332 | /* Delete */ |
606 | palkovsky | 333 | if (position == curlen) |
334 | continue; |
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2108 | jermar | 335 | for (i = position + 1; i < curlen; i++) { |
606 | palkovsky | 336 | putchar(current[i]); |
2108 | jermar | 337 | current[i - 1] = current[i]; |
606 | palkovsky | 338 | } |
339 | putchar(' '); |
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2108 | jermar | 340 | rdln_print_c('\b', curlen - position); |
606 | palkovsky | 341 | curlen--; |
2108 | jermar | 342 | } else if (c == 0x48) { /* Home */ |
343 | rdln_print_c('\b', position); |
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606 | palkovsky | 344 | position = 0; |
2108 | jermar | 345 | } else if (c == 0x46) { /* End */ |
346 | for (i = position; i < curlen; i++) |
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606 | palkovsky | 347 | putchar(current[i]); |
348 | position = curlen; |
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2108 | jermar | 349 | } else if (c == 0x44) { /* Left */ |
601 | palkovsky | 350 | if (position > 0) { |
351 | putchar('\b'); |
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352 | position--; |
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353 | } |
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354 | continue; |
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2108 | jermar | 355 | } else if (c == 0x43) { /* Right */ |
601 | palkovsky | 356 | if (position < curlen) { |
357 | putchar(current[position]); |
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358 | position++; |
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359 | } |
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360 | continue; |
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2108 | jermar | 361 | } else if (c == 0x41 || c == 0x42) { |
362 | /* Up, down */ |
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363 | rdln_print_c('\b', position); |
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364 | rdln_print_c(' ', curlen); |
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365 | rdln_print_c('\b', curlen); |
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607 | palkovsky | 366 | if (c == 0x41) /* Up */ |
601 | palkovsky | 367 | histposition--; |
368 | else |
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369 | histposition++; |
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2108 | jermar | 370 | if (histposition < 0) { |
371 | histposition = KCONSOLE_HISTORY - 1; |
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372 | } else { |
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373 | histposition = |
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374 | histposition % KCONSOLE_HISTORY; |
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375 | } |
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601 | palkovsky | 376 | current = history[histposition]; |
377 | printf("%s", current); |
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378 | curlen = strlen(current); |
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379 | position = curlen; |
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380 | continue; |
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381 | } |
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382 | continue; |
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383 | } |
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384 | if (curlen >= MAX_CMDLINE) |
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385 | continue; |
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386 | |||
387 | insert_char(current, c, position); |
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388 | |||
389 | curlen++; |
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2108 | jermar | 390 | for (i = position; i < curlen; i++) |
601 | palkovsky | 391 | putchar(current[i]); |
392 | position++; |
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2108 | jermar | 393 | rdln_print_c('\b',curlen - position); |
601 | palkovsky | 394 | } |
603 | palkovsky | 395 | if (curlen) { |
396 | histposition++; |
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397 | histposition = histposition % KCONSOLE_HISTORY; |
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398 | } |
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601 | palkovsky | 399 | current[curlen] = '\0'; |
400 | return current; |
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401 | } |
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402 | |||
510 | jermar | 403 | /** Kernel console managing thread. |
404 | * |
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1708 | jermar | 405 | * @param prompt Kernel console prompt (e.g kconsole/panic). |
510 | jermar | 406 | */ |
609 | palkovsky | 407 | void kconsole(void *prompt) |
510 | jermar | 408 | { |
517 | jermar | 409 | cmd_info_t *cmd_info; |
410 | count_t len; |
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601 | palkovsky | 411 | char *cmdline; |
510 | jermar | 412 | |
413 | if (!stdin) { |
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2462 | jermar | 414 | printf("%s: no stdin\n", __func__); |
510 | jermar | 415 | return; |
416 | } |
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417 | |||
418 | while (true) { |
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2113 | decky | 419 | cmdline = clever_readline((char *) prompt, stdin); |
601 | palkovsky | 420 | len = strlen(cmdline); |
421 | if (!len) |
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518 | jermar | 422 | continue; |
517 | jermar | 423 | cmd_info = parse_cmdline(cmdline, len); |
518 | jermar | 424 | if (!cmd_info) |
517 | jermar | 425 | continue; |
2108 | jermar | 426 | if (strncmp(cmd_info->name, "exit", |
427 | min(strlen(cmd_info->name), 5)) == 0) |
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609 | palkovsky | 428 | break; |
517 | jermar | 429 | (void) cmd_info->func(cmd_info->argv); |
510 | jermar | 430 | } |
431 | } |
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517 | jermar | 432 | |
1780 | jermar | 433 | static int parse_int_arg(char *text, size_t len, unative_t *result) |
585 | palkovsky | 434 | { |
1972 | jermar | 435 | static char symname[MAX_SYMBOL_NAME]; |
1780 | jermar | 436 | uintptr_t symaddr; |
585 | palkovsky | 437 | bool isaddr = false; |
589 | palkovsky | 438 | bool isptr = false; |
585 | palkovsky | 439 | |
440 | /* If we get a name, try to find it in symbol table */ |
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931 | palkovsky | 441 | if (text[0] == '&') { |
442 | isaddr = true; |
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2108 | jermar | 443 | text++; |
444 | len--; |
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931 | palkovsky | 445 | } else if (text[0] == '*') { |
446 | isptr = true; |
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2108 | jermar | 447 | text++; |
448 | len--; |
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931 | palkovsky | 449 | } |
614 | palkovsky | 450 | if (text[0] < '0' || text[0] > '9') { |
2108 | jermar | 451 | strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME)); |
585 | palkovsky | 452 | symaddr = get_symbol_addr(symname); |
453 | if (!symaddr) { |
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2108 | jermar | 454 | printf("Symbol %s not found.\n", symname); |
585 | palkovsky | 455 | return -1; |
456 | } |
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1780 | jermar | 457 | if (symaddr == (uintptr_t) -1) { |
2108 | jermar | 458 | printf("Duplicate symbol %s.\n", symname); |
585 | palkovsky | 459 | symtab_print_search(symname); |
460 | return -1; |
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461 | } |
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932 | palkovsky | 462 | if (isaddr) |
1780 | jermar | 463 | *result = (unative_t)symaddr; |
932 | palkovsky | 464 | else if (isptr) |
1780 | jermar | 465 | *result = **((unative_t **)symaddr); |
932 | palkovsky | 466 | else |
1780 | jermar | 467 | *result = *((unative_t *)symaddr); |
932 | palkovsky | 468 | } else { /* It's a number - convert it */ |
585 | palkovsky | 469 | *result = atoi(text); |
932 | palkovsky | 470 | if (isptr) |
1780 | jermar | 471 | *result = *((unative_t *)*result); |
932 | palkovsky | 472 | } |
931 | palkovsky | 473 | |
585 | palkovsky | 474 | return 0; |
475 | } |
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476 | |||
517 | jermar | 477 | /** Parse command line. |
478 | * |
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479 | * @param cmdline Command line as read from input device. |
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480 | * @param len Command line length. |
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481 | * |
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482 | * @return Structure describing the command. |
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483 | */ |
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484 | cmd_info_t *parse_cmdline(char *cmdline, size_t len) |
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485 | { |
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486 | index_t start = 0, end = 0; |
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487 | cmd_info_t *cmd = NULL; |
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488 | link_t *cur; |
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2113 | decky | 489 | count_t i; |
668 | bondari | 490 | int error = 0; |
517 | jermar | 491 | |
518 | jermar | 492 | if (!parse_argument(cmdline, len, &start, &end)) { |
517 | jermar | 493 | /* Command line did not contain alphanumeric word. */ |
494 | return NULL; |
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495 | } |
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496 | |||
497 | spinlock_lock(&cmd_lock); |
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498 | |||
499 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
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500 | cmd_info_t *hlp; |
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501 | |||
502 | hlp = list_get_instance(cur, cmd_info_t, link); |
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503 | spinlock_lock(&hlp->lock); |
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504 | |||
635 | palkovsky | 505 | if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name), |
2108 | jermar | 506 | end - start + 1)) == 0) { |
517 | jermar | 507 | cmd = hlp; |
508 | break; |
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509 | } |
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510 | |||
511 | spinlock_unlock(&hlp->lock); |
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512 | } |
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513 | |||
514 | spinlock_unlock(&cmd_lock); |
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515 | |||
516 | if (!cmd) { |
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517 | /* Unknown command. */ |
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518 | jermar | 518 | printf("Unknown command.\n"); |
517 | jermar | 519 | return NULL; |
520 | } |
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521 | |||
522 | /* cmd == hlp is locked */ |
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523 | |||
524 | /* |
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525 | * The command line must be further analyzed and |
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526 | * the parameters therefrom must be matched and |
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527 | * converted to those specified in the cmd info |
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528 | * structure. |
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529 | */ |
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518 | jermar | 530 | |
531 | for (i = 0; i < cmd->argc; i++) { |
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532 | char *buf; |
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533 | start = end + 1; |
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534 | if (!parse_argument(cmdline, len, &start, &end)) { |
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535 | printf("Too few arguments.\n"); |
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536 | spinlock_unlock(&cmd->lock); |
||
537 | return NULL; |
||
538 | } |
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539 | |||
668 | bondari | 540 | error = 0; |
518 | jermar | 541 | switch (cmd->argv[i].type) { |
582 | palkovsky | 542 | case ARG_TYPE_STRING: |
2113 | decky | 543 | buf = (char *) cmd->argv[i].buffer; |
544 | strncpy(buf, (const char *) &cmdline[start], |
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2108 | jermar | 545 | min((end - start) + 2, cmd->argv[i].len)); |
518 | jermar | 546 | buf[min((end - start) + 1, cmd->argv[i].len - 1)] = '\0'; |
547 | break; |
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585 | palkovsky | 548 | case ARG_TYPE_INT: |
2108 | jermar | 549 | if (parse_int_arg(cmdline + start, end - start + 1, |
550 | &cmd->argv[i].intval)) |
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668 | bondari | 551 | error = 1; |
518 | jermar | 552 | break; |
585 | palkovsky | 553 | case ARG_TYPE_VAR: |
2108 | jermar | 554 | if (start != end && cmdline[start] == '"' && |
555 | cmdline[end] == '"') { |
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2113 | decky | 556 | buf = (char *) cmd->argv[i].buffer; |
2108 | jermar | 557 | strncpy(buf, (const char *) &cmdline[start + 1], |
558 | min((end-start), cmd->argv[i].len)); |
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559 | buf[min((end - start), cmd->argv[i].len - 1)] = |
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560 | '\0'; |
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1780 | jermar | 561 | cmd->argv[i].intval = (unative_t) buf; |
585 | palkovsky | 562 | cmd->argv[i].vartype = ARG_TYPE_STRING; |
2108 | jermar | 563 | } else if (!parse_int_arg(cmdline + start, end - start + 1, |
564 | &cmd->argv[i].intval)) { |
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585 | palkovsky | 565 | cmd->argv[i].vartype = ARG_TYPE_INT; |
2108 | jermar | 566 | } else { |
585 | palkovsky | 567 | printf("Unrecognized variable argument.\n"); |
668 | bondari | 568 | error = 1; |
582 | palkovsky | 569 | } |
585 | palkovsky | 570 | break; |
582 | palkovsky | 571 | case ARG_TYPE_INVALID: |
572 | default: |
||
573 | printf("invalid argument type\n"); |
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668 | bondari | 574 | error = 1; |
582 | palkovsky | 575 | break; |
518 | jermar | 576 | } |
577 | } |
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517 | jermar | 578 | |
668 | bondari | 579 | if (error) { |
580 | spinlock_unlock(&cmd->lock); |
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581 | return NULL; |
||
582 | } |
||
583 | |||
518 | jermar | 584 | start = end + 1; |
585 | if (parse_argument(cmdline, len, &start, &end)) { |
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586 | printf("Too many arguments.\n"); |
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587 | spinlock_unlock(&cmd->lock); |
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588 | return NULL; |
||
589 | } |
||
590 | |||
517 | jermar | 591 | spinlock_unlock(&cmd->lock); |
592 | return cmd; |
||
593 | } |
||
594 | |||
518 | jermar | 595 | /** Parse argument. |
596 | * |
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597 | * Find start and end positions of command line argument. |
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598 | * |
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599 | * @param cmdline Command line as read from the input device. |
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600 | * @param len Number of characters in cmdline. |
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601 | * @param start On entry, 'start' contains pointer to the index |
||
602 | * of first unprocessed character of cmdline. |
||
603 | * On successful exit, it marks beginning of the next argument. |
||
604 | * @param end Undefined on entry. On exit, 'end' points to the last character |
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605 | * of the next argument. |
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606 | * |
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607 | * @return false on failure, true on success. |
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608 | */ |
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609 | bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end) |
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610 | { |
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2113 | decky | 611 | index_t i; |
518 | jermar | 612 | bool found_start = false; |
613 | |||
614 | ASSERT(start != NULL); |
||
615 | ASSERT(end != NULL); |
||
616 | |||
617 | for (i = *start; i < len; i++) { |
||
618 | if (!found_start) { |
||
2572 | jermar | 619 | if (isspace(cmdline[i])) |
518 | jermar | 620 | (*start)++; |
621 | else |
||
622 | found_start = true; |
||
623 | } else { |
||
2572 | jermar | 624 | if (isspace(cmdline[i])) |
518 | jermar | 625 | break; |
626 | } |
||
627 | } |
||
628 | *end = i - 1; |
||
629 | |||
630 | return found_start; |
||
631 | } |
||
1702 | cejka | 632 | |
1888 | jermar | 633 | /** @} |
1702 | cejka | 634 | */ |