08-12-2010
Hi.
Yes, it's a regular expression.
Neo wrote a blog entry on
a cool tool.
Aside from that, googling "regular expression" should give many good results (and, admittedly many not so good results
).
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rmdir(2) System Calls Manual rmdir(2)
NAME
rmdir() - remove a directory file
SYNOPSIS
DESCRIPTION
The system call removes a directory file whose name is given by path. The directory must be empty (except for the files and before it can
be removed.
RETURN VALUE
returns the following values:
Successful completion.
Failure.
is set to indicate the error.
ERRORS
If fails, is set to one of the following values.
[EACCES] A component of the path prefix denies search permission.
[EACCES] Write permission is denied on the directory containing the link to be removed.
[EACCES] The process does not have read/write access permission to the parent directory.
[EBUSY] The directory to be removed is the mount point for a mounted file system.
[EBUSY] The path is the current working directory.
[EEXIST] The named directory is not empty. It contains files other than and
[EFAULT] path points outside the process's allocated address space. The reliable detection of this error is implementation-
dependent.
[ELOOP] Too many symbolic links were encountered in translating the path name.
[ENAMETOOLONG] The length of the specified path name exceeds bytes, or the length of a component of the path name exceeds bytes
while is in effect.
[ENOENT] The named file does not exist.
[ENOTDIR] A component of the path is not a directory.
[EPERM] The directory containing the directory to be removed has the sticky bit set and neither the containing directory nor
the directory to be removed are owned by the effective user ID.
[EROFS] The directory entry to be removed resides on a read-only file system.
AUTHOR
was developed by the University of California, Berkeley and HP.
SEE ALSO
mkdir(2), unlink(2), remove(3C), privileges(5).
STANDARDS CONFORMANCE
rmdir(2)