c++代码实现linux命令pmap
时间: 2023-08-05 07:19:38 浏览: 111
以下是使用 C++ 实现 `pmap` 命令的示例代码:
```c++
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <iomanip>
using namespace std;
string to_hex(unsigned long long value) {
stringstream stream;
stream << "0x" << setfill('0') << setw(sizeof(void*)*2) << hex << value;
return stream.str();
}
int main(int argc, char** argv) {
if (argc != 2) {
cout << "Usage: " << argv[0] << " <process-id>" << endl;
return 1;
}
ifstream ifs("/proc/" + string(argv[1]) + "/maps");
if (!ifs) {
cout << "Failed to open /proc/" << argv[1] << "/maps" << endl;
return 2;
}
string line;
while (getline(ifs, line)) {
unsigned long long start, end;
string perms, offset, device, inode, pathname;
istringstream iss(line);
iss >> hex >> start;
iss.ignore(1, '-');
iss >> hex >> end;
iss >> perms >> offset >> device >> inode >> pathname;
cout << to_hex(start) << "-" << to_hex(end) << " " << perms << " " << offset << " " << device << " " << inode;
if (!pathname.empty()) {
cout << " " << pathname;
}
cout << endl;
}
return 0;
}
```
该程序会读取指定进程的 `/proc/<pid>/maps` 文件,解析其中的每一行内容,并将其输出到标准输出。输出的格式与 `pmap` 命令相同。
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