写一段使用c++ 读取cmdline内容的代码
时间: 2023-02-21 16:29:55 浏览: 68
下面是一段读取命令行参数的 C 代码:
```
#include <stdio.h>
int main(int argc, char *argv[])
{
int i;
printf("命令行参数的数量: %d\n", argc);
printf("命令行参数列表: \n");
for (i = 0; i < argc; i++)
printf("%s\n", argv[i]);
return 0;
}
```
在这段代码中,`argc` 表示命令行参数的数量,`argv` 是一个字符串数组,存储了所有命令行参数。在这段代码中,我们使用一个 for 循环来遍历所有命令行参数,并打印出它们的内容。
相关问题
写一个nvidia orin c++版本推流代码这一段
以下是一个基本的 NVIDIA Orin 推流代码示例,使用了 NVIDIA 的 Video Codec SDK 和 Multimedia API(NvMedia):
```
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <nvmedia.h>
#include <nvmedia_codec.h>
#include <nvmedia_image.h>
#include <nvmedia_ipp.h>
#include <nvmedia_surface.h>
#include <nvmedia_utils/cmdline.h>
#define CHUNK_SIZE 32768
static volatile NvBool s_gotCtrlC = NVMEDIA_FALSE;
static void ctrlCHandler(int)
{
s_gotCtrlC = NVMEDIA_TRUE;
}
static NvMediaStatus EncodeFrame(NvMediaVideoEncoder *encoder, NvMediaImage *image, NvMediaTimeCode *timeCode)
{
NvMediaVideoEncodePicParams encodePicParams = {0};
NvMediaVideoEncodeConfigH264 h264Config = {0};
NvMediaStatus status = NVMEDIA_STATUS_OK;
encodePicParams.version = NVMEDIA_VIDEO_ENCODE_PIC_PARAMS_VER;
encodePicParams.inputFormat = NVMEDIA_VIDEO_INPUT_FORMAT_YUV_420_PLANAR;
encodePicParams.codedPicFlag = NVMEDIA_FALSE;
encodePicParams.repeatFirstField = NVMEDIA_FALSE;
encodePicParams.timeCode = timeCode;
status = NvMediaVideoEncoderRenderPicture(encoder, image, NULL, &encodePicParams);
if(status != NVMEDIA_STATUS_OK)
{
fprintf(stderr, "Error: NvMediaVideoEncoderRenderPicture() failed\n");
return status;
}
memset(&h264Config, 0, sizeof(h264Config));
h264Config.frameRateDen = 1;
h264Config.frameRateNum = 30;
h264Config.maxNumRefFrames = 1;
h264Config.width = image->width;
h264Config.height = image->height;
h264Config.idrPeriod = 30;
status = NvMediaVideoEncoderSetConfiguration(encoder, &h264Config);
if(status != NVMEDIA_STATUS_OK)
{
fprintf(stderr, "Error: NvMediaVideoEncoderSetConfiguration() failed\n");
return status;
}
status = NvMediaVideoEncoderFeedFrame(encoder, &encodePicParams, NULL);
if(status != NVMEDIA_STATUS_OK)
{
fprintf(stderr, "Error: NvMediaVideoEncoderFeedFrame() failed\n");
return status;
}
return status;
}
int main(int argc, char **argv)
{
NvMediaDevice *device = NULL;
NvMediaVideoEncoder *encoder = NULL;
NvMediaImage *image = NULL;
NvMediaTimeCode timeCode = {0};
NvMediaStatus status = NVMEDIA_STATUS_OK;
NvMediaIPPComponent *ippComponent = NULL;
NvMediaIPPPlugin *ippPlugin = NULL;
NvMediaIPPPluginSupportFuncs ippPluginSupportFuncs = {0};
NvMediaIPPBufferPoolParams bufferPoolParams = {0};
NvMediaIPPBufferPool *bufferPool = NULL;
NvMediaIPPBuffer *buffer = NULL;
NvMediaIPPBuffer *nextBuffer = NULL;
NvMediaIPPBuffer *outBuffer = NULL;
NvMediaIPPComponentOutput output = {0};
NvMediaIPPComponentOutput output2 = {0};
FILE *inputFile = NULL;
char *inputFileName = NULL;
uint8_t *chunk = NULL;
uint32_t chunk
在Linux中写一段python代码,有趣的
以下是一段在Linux中执行的Python代码,它会打印出当前系统中所有正在运行的进程的PID和名称:
```python
import os
def get_running_processes():
pids = [pid for pid in os.listdir('/proc') if pid.isdigit()]
processes = []
for pid in pids:
try:
with open(os.path.join('/proc', pid, 'cmdline'), 'rb') as f:
cmd = f.read().decode().replace('\x00', ' ')
if cmd:
processes.append((int(pid), cmd))
except IOError:
continue
return sorted(processes, key=lambda x: x[0])
if __name__ == '__main__':
processes = get_running_processes()
for pid, cmd in processes:
print(f'PID: {pid}, Name: {cmd}')
```
该代码会遍历`/proc`目录下所有以数字为名的子目录,这些子目录代表了系统中正在运行的所有进程。然后,它会读取每个进程的`cmdline`文件,获取进程的名称和PID。最后,代码会按PID排序并打印出所有进程的名称和PID。
要在Linux中执行该代码,只需在终端中使用`python3`命令运行代码即可。