package globlon

https://man7.org/linux/man-pages/man3/glob.3.html

The argument flags is made up of the bitwise OR of zero or more of the following symbolic constants, which modify the behavior of glob():

GLOB_ERR Return upon a read error (because a directory does not have read permission, for example). By default, glob() attempts carry on despite errors, reading all of the directories that it can.

GLOB_MARK Append a slash to each path which corresponds to a directory.

GLOB_NOSORT Don't sort the returned pathnames. The only reason to do this is to save processing time. By default, the returned pathnames are sorted.

GLOB_DOOFFS Reserve pglob->gl_offs slots at the beginning of the list of strings in pglob->pathv. The reserved slots contain null pointers.

GLOB_NOCHECK If no pattern matches, return the original pattern. By default, glob() returns GLOB_NOMATCH if there are no matches.

GLOB_APPEND Append the results of this call to the vector of results returned by a previous call to glob(). Do not set this flag on the first invocation of glob().

GLOB_NOESCAPE Don't allow backslash ('\') to be used as an escape character. Normally, a backslash can be used to quote the following character, providing a mechanism to turn off the special meaning metacharacters.

flags may also include any of the following, which are GNU extensions and not defined by POSIX.2:

GLOB_PERIOD Allow a leading period to be matched by metacharacters. By default, metacharacters can't match a leading period.

GLOB_ALTDIRFUNC Use alternative functions pglob->gl_closedir, pglob->gl_readdir, pglob->gl_opendir, pglob->gl_lstat, and pglob->gl_stat for filesystem access instead of the normal library functions.

GLOB_BRACE Expand csh(1) style brace expressions of the form a,b. Brace expressions can be nested. Thus, for example, specifying the pattern "foo/{,cat,dog,bar

}

" would return the same results as four separate glob() calls using the strings: "foo/", "foo/cat", "foo/dog", and "bar".

GLOB_NOMAGIC If the pattern contains no metacharacters, then it should be returned as the sole matching word, even if there is no file with that name.

GLOB_TILDE Carry out tilde expansion. If a tilde ('~') is the only character in the pattern, or an initial tilde is followed immediately by a slash ('/'), then the home directory of the caller is substituted for the tilde. If an initial tilde is followed by a username (e.g., "~andrea/bin"), then the tilde and username are substituted by the home directory of that user. If the username is invalid, or the home directory cannot be determined, then no substitution is performed.

GLOB_TILDE_CHECK This provides behavior similar to that of GLOB_TILDE. The difference is that if the username is invalid, or the home directory cannot be determined, then instead of using the pattern itself as the name, glob() returns GLOB_NOMATCH to indicate an error.

GLOB_ONLYDIR This is a hint to glob() that the caller is interested only in directories that match the pattern. If the implementation can easily determine file-type information, then nondirectory files are not returned to the caller. However, the caller must still check that returned files are directories. (The purpose of this flag is merely to optimize performance when the caller is interested only in directories.)