質問編集履歴
2
修正後のコード追加
test
CHANGED
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File without changes
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test
CHANGED
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@@ -99,3 +99,87 @@
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99
99
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}
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100
100
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101
101
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```
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102
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+
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103
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+
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104
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+
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105
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+
###execvpに変更後のソースコード
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106
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+
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107
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+
```C
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108
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+
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109
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+
#include <stdio.h>
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110
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+
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111
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#include <unistd.h>
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112
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+
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113
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+
#include <string.h>
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114
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+
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115
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+
#include <sys/wait.h>
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116
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+
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117
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+
#define S 1000
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118
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+
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119
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+
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120
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+
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121
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+
int main(int argc, char *argv[]){
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122
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+
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123
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char* token[S];
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124
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+
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125
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char usrin[S];
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126
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+
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127
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+
int pid, status, count;
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128
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+
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129
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+
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130
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+
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131
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+
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132
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+
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133
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+
printf(">>");
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134
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+
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135
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+
fgets(usrin, sizeof(usrin), stdin);
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136
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+
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137
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+
usrin[strlen(usrin)-1] = '\0';
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138
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+
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139
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+
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140
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+
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141
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+
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142
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+
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143
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+
token[0] = strtok(usrin, " ");
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144
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+
|
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145
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+
for(count=1; count<S; ++count){
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146
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+
|
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147
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+
token[count] = strtok(NULL, " ");
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148
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+
|
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149
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+
if(token[count]==NULL)
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150
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+
|
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151
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+
break;
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152
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+
|
|
153
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+
}
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154
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+
|
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155
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+
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|
156
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+
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157
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+
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158
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+
|
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159
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+
pid = fork();
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160
|
+
|
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161
|
+
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162
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+
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163
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+
if(pid==0){ /* token[0] => ls, token[1] => NULL */
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164
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+
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165
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+
execvp(token[0], token);
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166
|
+
|
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167
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+
}
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168
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+
|
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169
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+
else {
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170
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+
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171
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+
wait(&status);
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172
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+
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173
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+
|
|
174
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+
|
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175
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+
}
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176
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+
|
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177
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+
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178
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+
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179
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+
return 0;
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|
180
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+
|
|
181
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+
}
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|
182
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+
|
|
183
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+
|
|
184
|
+
|
|
185
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+
```
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1
質問訂正
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -78,6 +78,8 @@
|
|
|
78
78
|
|
|
79
79
|
if(pid==0){
|
|
80
80
|
|
|
81
|
+
/* この時点で入力がlsの場合 token[0]="/usr/bin/ls" token[1]=NULLを確認済 */
|
|
82
|
+
|
|
81
83
|
execv(token[0], token);
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|
82
84
|
|
|
83
85
|
}
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