[英]How to get output from Linux command via C/C++? and suitable for android?
I try to run a Linux command and read the output from it by using C/C++ code. 我尝试运行Linux命令并使用C / C ++代码从中读取输出。 I search for exec but this don't deal with input/output.
我搜索exec但这不涉及输入/输出。
What I am trying to achieve is to get information about wireless LAN by using this command iwconfig
, invoking it from C/C++ code. 我想要实现的是通过使用此命令
iwconfig
获取有关无线LAN的信息,从C / C ++代码调用它。
also i need a suitable code to use it as lib for android using NDK. 我还需要一个合适的代码,使用NDK作为Android的lib。
i see in android open source they called this function 我在android开源中看到他们调用了这个函数
what do you think about this code ? 你怎么看待这段代码?
int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
char *reply, size_t *reply_len,
void (*msg_cb)(char *msg, size_t len))
{
DWORD written;
DWORD readlen = *reply_len;
if (!WriteFile(ctrl->pipe, cmd, cmd_len, &written, NULL))
return -1;
if (!ReadFile(ctrl->pipe, reply, *reply_len, &readlen, NULL))
return -1;
*reply_len = readlen;
return 0;
} }
You could try running the command and outputting the results to a file, then reading it 您可以尝试运行该命令并将结果输出到文件,然后读取它
system("iwconfig > temp.txt");
FILE *fp=fopen("temp.txt","w");
i see in android open source they called this function 我在android开源中看到他们调用了这个函数
what do you think about this code ? 你怎么看待这段代码?
int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
char *reply, size_t *reply_len,
void (*msg_cb)(char *msg, size_t len))
{
DWORD written;
DWORD readlen = *reply_len;
if (!WriteFile(ctrl->pipe, cmd, cmd_len, &written, NULL))
return -1;
if (!ReadFile(ctrl->pipe, reply, *reply_len, &readlen, NULL))
return -1;
*reply_len = readlen;
return 0;
}
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