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# std::experimental::filesystem::directory_entry::status, std::experimental::filesystem::directory_entry::symlink_status

From cppreference.com
< cpp‎ | experimental‎ | fs‎ | directory entry

file_status status() const; file_status status( error_code& ec ) const; | (1) | (filesystem TS)
file_status symlink_status() const; file_status symlink_status( error_code& ec ) const; | (2) | (filesystem TS)

1) Returns the potentially cached status of the entry, as if determined by a status call (symlinks are followed to their targets)
2) Returns the potentially cached status of the entry, as if determined by a symlink_status call (symlinks are not followed)

### [edit] Parameters

ec | - | out-parameter for error reporting in the non-throwing overload

### [edit] Return value

The status of the file referred to by the entry.

### [edit] Exceptions

The overload that does not take a `error_code&` parameter throws filesystem_error on underlying OS API errors, constructed with `p` as the first argument and the OS error code as the error code argument. std::bad_alloc may be thrown if memory allocation fails. The overload taking a `error_code&` parameter sets it to the OS API error code if an OS API call fails, and executes ec.clear() if no errors occur. This overload has
`noexcept` specification:
noexcept

### [edit] Notes

The file status information is usually provided as a byproduct of directory iteration, in which case it is cached and may be obtained by these member functions without the cost of an additional system call. During directory iteration, calling `status` is unnecessary and accessors such as `is_directory` should be called with the cached status value, not with a path.

### [edit] Example

Run this code

    #include <iostream>
    #include <fstream>
    #include <cstdio>
    #include <cstring>
    #include <experimental/filesystem>
    #include <unistd.h>
    #include <sys/socket.h>
    #include <sys/un.h>
    #include <sys/stat.h>

    namespace fs = std::experimental::filesystem;

    void demo_status(const fs::path& p, fs::file_status s)
    {
        std::cout << p;
        // alternative: switch(s.type()) { case fs::file_type::regular: ...}
        if(fs::is_regular_file(s)) std::cout << " is a regular file\n";
        if(fs::is_directory(s)) std::cout << " is a directory\n";
        if(fs::is_block_file(s)) std::cout << " is a block device\n";
        if(fs::is_character_file(s)) std::cout << " is a character device\n";
        if(fs::is_fifo(s)) std::cout << " is a named IPC pipe\n";
        if(fs::is_socket(s)) std::cout << " is a named IPC socket\n";
        if(fs::is_symlink(s)) std::cout << " is a symlink\n";
        if(!fs::exists(s)) std::cout << " does not exist\n";
    }
    int main()
    {
        // create files of different kinds
        fs::create_directory("sandbox");
        std::ofstream("sandbox/file"); // create regular file
        fs::create_directory("sandbox/dir");
        mkfifo("sandbox/pipe", 0644);
        struct sockaddr_un addr;
        addr.sun_family = AF_UNIX;
        std::strcpy(addr.sun_path, "sandbox/sock");
        int fd = socket(PF_UNIX, SOCK_STREAM, 0);
        bind(fd, (struct sockaddr*)&addr, sizeof addr);
        fs::create_symlink("file", "sandbox/symlink");

        // demo different status accessors
        for(auto it = fs::directory_iterator("sandbox"); it != fs::directory_iterator(); ++it)
            demo_status(*it, it->symlink_status()); // use cached status from directory entry
        demo_status("dev/null", fs::status("/dev/null")); // direct calls to status
        demo_status("dev/sda", fs::status("/dev/sda"));
        demo_status("sandbox/no", fs::status("/sandbox/no"));

        // cleanup
        close(fd);
        fs::remove_all("sandbox");
    }

Possible output:

    "sandbox/file" is a regular file
    "sandbox/dir" is a directory
    "sandbox/pipe" is a named IPC pipe
    "sandbox/sock" is a named IPC socket
    "sandbox/symlink" is a symlink
    "dev/null" is a character device
    "dev/sda" is a block device
    "sandbox/no" does not exist

### [edit] See also

file_status | represents file type and permissions (class) [edit]
status symlink_status | determines file attributes determines file attributes, checking the symlink target (function) [edit]
status_known | checks whether file status is known (function) [edit]
is_block_file | checks whether the given path refers to block device (function) [edit]
is_character_file | checks whether the given path refers to a character device (function) [edit]
is_directory | checks whether the given path refers to a directory (function) [edit]
is_fifo | checks whether the given path refers to a named pipe (function) [edit]
is_other | checks whether the argument refers to an other file (function) [edit]
is_regular_file | checks whether the argument refers to a regular file (function) [edit]
is_socket | checks whether the argument refers to a named IPC socket (function) [edit]
is_symlink | checks whether the argument refers to a symbolic link (function) [edit]

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