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RedHat 9 (Linux i386) - man page for rmdir (redhat section 2)

RMDIR(2)						     Linux Programmer's Manual							  RMDIR(2)

NAME
rmdir - delete a directory
SYNOPSIS
#include <unistd.h> int rmdir(const char *pathname);
DESCRIPTION
rmdir deletes a directory, which must be empty.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM The filesystem containing pathname does not support the removal of directories. EFAULT pathname points outside your accessible address space. EACCES Write access to the directory containing pathname was not allowed for the process's effective uid, or one of the directories in pathname did not allow search (execute) permission. EPERM The directory containing pathname has the sticky-bit (S_ISVTX) set and the process's effective uid is neither the uid of the file to be deleted nor that of the directory containing it. ENAMETOOLONG pathname was too long. ENOENT A directory component in pathname does not exist or is a dangling symbolic link. ENOTDIR pathname, or a component used as a directory in pathname, is not, in fact, a directory. ENOTEMPTY pathname contains entries other than . and .. . EBUSY pathname is the current working directory or root directory of some process. ENOMEM Insufficient kernel memory was available. EROFS pathname refers to a file on a read-only filesystem. ELOOP Too many symbolic links were encountered in resolving pathname.
CONFORMING TO
SVr4, SVID, POSIX, BSD 4.3
BUGS
Infelicities in the protocol underlying NFS can cause the unexpected disappearance of directories which are still being used.
SEE ALSO
rename(2), mkdir(2), chdir(2), unlink(2), rmdir(1), rm(1) Linux 0.99.7 1993-07-24 RMDIR(2)