File system

File system readdir_r

// INCLUDE
#include <dirent.h>

// PROTOTYPE
int readdir_r(DIR* pdir, struct dirent* dentry, struct dirent** out_dirent)

Reads the next entry from a directory. Used to find the names of all of the files and directories within a directory. See also readdir.

• dirp: The DIR* returned by opendir.
• dentry: Pass in a pointer to a struct dirent to be filled in with the current directory entry.
• out_dirent: If not NULL, filled in with dentry if a directory entry was retrieved, or NULL if at the end of the directory.

Not all fields of dentry are filled in. You should only rely on:

• d_type: Type of entry:
  • DT_REG: File
  • DT_DIR: Directory
• d_name: Name of the file or directory. Just the name, not the whole path.

Returns 0 on success. On error, returns -1 and sets errno.