修改用户输入以在EXEC呼叫中使用

发布于 2025-01-27 01:29:28 字数 583 浏览 1 评论 0原文

我正在尝试修改用户输入字符串以在将来函数中调用execVP。在我的代码中，我具有一个函数，该函数可以使用户输入具有：如果用户输入：命令ab c。它输出char ** output = {“命令”，“ a”，“ b”，“ c”，null}用户输入的长度未知。我的问题是我要修改变量char **输出以删除用户输入的命令，以便我获得char ** output = {“ a”，“ b”，“ c”，null} 我目前对此的尝试是在下面的代码中：

char** exec_arg(char** output, int numTokens){
143     char* argExec[numTokens];
147     for(int k = 0; k < (numTokens-1); k++){
148         argExec[k] = output[k+1];
149         printf("%s", argExec[k]);
150     }
152     return argExec;
155 }

但是，我发现当我运行时，我将得到输出：{“ a”，“ b”，“ c”}

原文

I am trying to modify a user input string to call execvp in a future function. In my code I have a function which tokenises the user input such that if the user entered in: command a b c. It outputs char** output = { "command", "a", "b", "c", NULL } The length of the user input is unknown.
My issue is that I want to modify the variable char** output to remove the user entered command, such that I get char** output = {"a", "b", "c", NULL }
My current attempt at this is in the code below:

char** exec_arg(char** output, int numTokens){
143     char* argExec[numTokens];
147     for(int k = 0; k < (numTokens-1); k++){
148         argExec[k] = output[k+1];
149         printf("%s", argExec[k]);
150     }
152     return argExec;
155 }

However I am finding that when I run this I am getting the output: {"a", "b", "c"}

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