Mkdir function in Linux

 

Prototype: int mkdir (const char * filename, mode_t Mode) If the return value is 0, the operation is successful. If the return value is-1, an error occurs. To use this function, you must include the header file SYS/STAT. h. Mode indicates the permission of the new directory. You can use the following values: S_irusr S_iread Read Permission bit for the owner of the file. on Alibaba systems this bit is 0400. s_iread is an obsolete synonym provided for BSD compatibility. S_iwusr S_iwrite Write Permission bit for the owner of the file. Usually 0200. s_iwrite is an obsolete synonym provided for BSD compatibility. S_ixusr S_iexec Execute (for ordinary files) or search (for directories) Permission bit for the owner of the file. Usually 0100. s_iexec is an obsolete synonym provided for BSD compatibility. S_irwxu This is equivalent to (s_irusr | s_iwusr | s_ixusr ). S_irgrp Read Permission bit for the group owner of the file. Usually 040. S_iwgrp Write Permission bit for the group owner of the file. Usually 020. S_ixgrp Execute or search permission bit for the group owner of the file. Usually 010. S_irwxg This is equivalent to (s_irgrp | s_iwgrp | s_ixgrp ). S_iroth Read Permission bit for other users. Usually 04. S_iwoth Write Permission bit for other users. Usually 02. S_ixoth Execute or search permission bit for other users. Usually 01. S_irwxo This is equivalent to (s_iroth | s_iwoth | s_ixoth ). S_isuid This is the set-user-id on execute bit, usually 04000. See how change persona. S_isgid This is the set-group-ID on execute bit, usually 02000. See how change persona. S_isvtx This is the sticky bit, usually 01000. Note: If there is a directory "test", you can create a new directory "/test/subdirectory" according to "mkdir", but you can't create a new Directory "/test/subdirectory", it will return-1.