Originální popis anglicky: 
glob.h - pathname pattern-matching types
Návod, kniha: POSIX Programmer's Manual
#include <glob.h>
The 
<glob.h> header shall define the structures and symbolic
  constants used by the 
glob() function.
The structure type 
glob_t shall contain at least the following members:
 
size_t   gl_pathc Count of paths matched by pattern. 
char   **gl_pathv Pointer to a list of matched pathnames. 
size_t   gl_offs  Slots to reserve at the beginning of gl_pathv. 
 
The following constants shall be provided as values for the 
flags
  argument:
  - GLOB_APPEND
 
  - Append generated pathnames to those previously
    obtained.
 
  - GLOB_DOOFFS
 
  - Specify how many null pointers to add to the beginning of
      gl_pathv.
 
  - GLOB_ERR
 
  - Cause glob() to return on error.
 
  - GLOB_MARK
 
  - Each pathname that is a directory that matches
      pattern has a slash appended.
 
  - GLOB_NOCHECK
 
  - If pattern does not match any pathname, then return
      a list consisting of only pattern.
 
  - GLOB_NOESCAPE
 
  - Disable backslash escaping.
 
  - GLOB_NOSORT
 
  - Do not sort the pathnames returned.
    
 
   
The following constants shall be defined as error return values:
  - GLOB_ABORTED
 
  - The scan was stopped because GLOB_ERR was set or
      (*errfunc)() returned non-zero.
 
  - GLOB_NOMATCH
 
  - The pattern does not match any existing pathname, and
      GLOB_NOCHECK was not set in flags.
 
  - GLOB_NOSPACE
 
  - An attempt to allocate memory failed.
 
  - GLOB_NOSYS
 
  - Reserved.
    
 
   
The following shall be declared as functions and may also be defined as macros.
  Function prototypes shall be provided.
 
int  glob(const char *restrict, int, int (*)(const char *, int),
         glob_t *restrict);
void globfree (glob_t *);
 
The implementation may define additional macros or constants using names
  beginning with GLOB_.
The following sections are informative.
None.
None.
None.
The System Interfaces volume of IEEE Std 1003.1-2001,
  
glob(), the Shell and Utilities volume of
  IEEE Std 1003.1-2001
Portions of this text are reprinted and reproduced in electronic form from IEEE
  Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
  Operating System Interface (POSIX), The Open Group Base Specifications Issue
  6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
  Engineers, Inc and The Open Group. In the event of any discrepancy between
  this version and the original IEEE and The Open Group Standard, the original
  IEEE and The Open Group Standard is the referee document. The original
  Standard can be obtained online at http://www.opengroup.org/unix/online.html
  .