getcwd()
是一个 C++ 标准库函数,用于获取当前工作目录的路径
getcwd()
的返回值:如果它返回一个空指针,说明获取目录失败。此时,可以通过检查 errno
来获取更多关于错误的信息。#include <iostream>
#include <cerrno>
#include <cstring>
#include <unistd.h>
#include <limits.h>
int main() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != nullptr) {
std::cout << "Current working directory: " << cwd << std::endl;
} else {
std::cerr << "Error getting current working directory: " << std::strerror(errno) << std::endl;
}
return 0;
}
access()
函数检查当前用户是否具有访问目标目录的权限:#include <iostream>
#include <cerrno>
#include <cstring>
#include <unistd.h>
#include <limits.h>
int main() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != nullptr) {
std::cout << "Current working directory: " << cwd << std::endl;
if (access(cwd, R_OK) == 0) {
std::cout << "You have read and write access to the current working directory." << std::endl;
} else {
std::cerr << "You do not have read and write access to the current working directory. Error: " << std::strerror(errno) << std::endl;
}
} else {
std::cerr << "Error getting current working directory: " << std::strerror(errno) << std::endl;
}
return 0;
}
sudo
命令提升权限,然后再次尝试运行程序。请注意,这些方法仅适用于处理文件和目录的读取和写入权限。如果你需要处理其他类型的权限问题,请根据具体情况采取相应的措施。