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+General introduction:
+  http://www.suse.de/~agruen/acl/linux-acls/online/
+
+
+POSIX ACLs
+
+Documents from POSIX.1e (headers & functions) and POSIX.2c (utilities):
+  http://wt.xpilot.org/publications/posix.1e/download.html
+
+
+Linux ACLs
+
+Introduction:
+  http://www.suse.de/~agruen/acl/linux-acls/online/
+Hands-on tutorial:
+  http://www.vanemery.com/Linux/ACL/linux-acl.html
+
+Manual pages:
+  http://www.linuxmanpages.com/
+Includes:
+  <sys/acl.h>
+  <acl/libacl.h>
+Library:
+  -lacl
+Functions:
+  acl_add_perm
+  acl_calc_mask
+  acl_check
+  acl_clear_perms
+  acl_cmp
+  acl_copy_entry
+  acl_copy_ext
+  acl_copy_int
+  acl_create_entry
+  acl_delete_def_file
+  acl_delete_entry
+  acl_delete_perm
+  acl_dup
+  acl_entries
+  acl_equiv_mode
+  acl_error
+  acl_extended_fd
+  acl_extended_file
+  acl_free
+  acl_from_mode
+  acl_from_text
+  acl_get_entry
+  acl_get_fd
+  acl_get_file
+  acl_get_perm
+  acl_get_permset
+  acl_get_qualifier
+  acl_get_tag_type
+  acl_init
+  acl_set_fd
+  acl_set_file
+  acl_set_permset
+  acl_set_qualifier
+  acl_set_tag_type
+  acl_size
+  acl_to_any_text
+  acl_to_text
+  acl_valid
+Utilities:
+  getfacl
+  setfacl
+
+
+Solaris ACLs
+
+Introductions:
+  http://www.softpanorama.org/Solaris/ACL/index.shtml
+  http://www.cs.duke.edu/csl/faqs/solaris-acls.php
+Manual pages:
+  http://docs.sun.com/app/docs/doc/816-5167/acl-2?l=en&a=view
+  http://docs.sun.com/app/docs/doc/816-5165/getfacl-1?l=en&a=view
+  http://docs.sun.com/app/docs/doc/816-5165/setfacl-1?l=en&a=view
+  http://docs.sun.com/app/docs/doc/816-5167/pathconf-2?l=en&a=view
+Includes:
+  <sys/acl.h>
+Library:
+  -lsec
+Functions:
+  acl
+  facl
+Functions in libsec:
+  aclcheck
+  aclfrommode
+  aclfromtext
+  aclsort
+  acltomode
+  acltotext
+Additionally in Solaris 10 patch 118833-17 (<sys/acl.h> version 1.15):
+  acl_t type
+  ACL_NO_TRIVIAL macro
+  ACE_OTHER macro replaced with ACE_EVERYONE macro
+  ACE_OWNER, ACE_GROUP changed their values(!)
+  ALLOW, DENY macros removed(!)
+  acl_check
+  acl_free
+  acl_fromtext
+  acl_get
+  acl_set
+  acl_strip
+  acl_totext
+  acl_trivial
+  facl_get
+  facl_set
+Utilities:
+  getfacl
+  setfacl
+  chmod
+
+
+FreeBSD ACLs
+
+Introduction:
+  http://www.freebsd.org/doc/en/books/handbook/fs-acl.html
+  http://www.onlamp.com/pub/a/bsd/2005/09/22/FreeBSD_Basics.html
+Manual pages:
+  http://www.freebsd.org/cgi/man.cgi
+  http://www.freebsd.org/cgi/man.cgi?query=acl&apropos=0&sektion=0&manpath=FreeBSD+7.0-RELEASE&format=html
+Includes:
+  <sys/acl.h>
+Library:
+  none needed
+Functions:
+  acl_add_perm
+  acl_calc_mask
+  acl_clear_perms
+  acl_copy_entry
+  acl_copy_ext
+  acl_copy_int
+  acl_create_entry
+  acl_delete_entry
+  acl_delete_fd_np
+  acl_delete_file_np
+  acl_delete_link_np
+  acl_delete_def_file
+  acl_delete_def_link_np
+  acl_delete_perm
+  acl_dup
+  acl_free
+  acl_from_text
+  acl_get
+  acl_get_entry
+  acl_get_fd
+  acl_get_fd_np
+  acl_get_file
+  acl_get_link_np
+  acl_get_perm_np
+  acl_get_permset
+  acl_get_qualifier
+  acl_get_tag_type
+  acl_init
+  acl_set
+  acl_set_fd
+  acl_set_fd_np
+  acl_set_file
+  acl_set_link_np
+  acl_set_permset
+  acl_set_qualifier
+  acl_set_tag_type
+  acl_size
+  acl_to_text
+  acl_valid
+  acl_valid_fd_np
+  acl_valid_file_np
+  acl_valid_link_np
+Utilities:
+  getfacl
+  setfacl
+
+
+NetBSD ACLs
+
+Not available.
+
+
+OpenBSD ACLs
+
+Not available.
+
+
+MacOS X ACLs
+
+Manual pages:
+  http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/acl.3.html
+Includes:
+  <sys/acl.h>
+Library:
+  none needed
+Functions:
+  acl_add_flag_np
+  acl_add_perm
+  acl_calc_mask
+  acl_clear_flags_np
+  acl_clear_perms
+  acl_copy_entry
+  acl_copy_ext
+  acl_copy_ext_native
+  acl_copy_int
+  acl_copy_int_native
+  acl_create_entry
+  acl_create_entry_np
+  acl_delete_def_file
+  acl_delete_fd_np (undeclared?)
+  acl_delete_file_np (undeclared?)
+  acl_delete_flag_np
+  acl_delete_link_np (undeclared?)
+  acl_delete_entry
+  acl_delete_perm
+  acl_dup
+  acl_free
+  acl_from_text
+  acl_get_entry
+  acl_get_fd
+  acl_get_fd_np
+  acl_get_file
+  acl_get_flag_np
+  acl_get_flagset_np
+  acl_get_link_np
+  acl_get_perm_np
+  acl_get_permset
+  acl_get_qualifier
+  acl_get_tag_type
+  acl_init
+  acl_set_fd
+  acl_set_fd_np
+  acl_set_file
+  acl_set_flagset_np
+  acl_set_link_np
+  acl_set_permset
+  acl_set_qualifier
+  acl_set_tag_type
+  acl_size
+  acl_to_text
+  acl_valid
+  acl_valid_fd_np
+  acl_valid_file_np
+  acl_valid_link_np
+Utilities:
+  chmod
+
+
+HP-UX 11.00 ACLs
+
+Present in HP-UX >= 11.00. On some machines, yields ENOSYS always.
+Manual pages:
+  getacl, fgetacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02261503/c02261503.pdf
+  setacl, fsetacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02267386/c02267386.pdf
+  lsacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02261049/c02261049.pdf
+  chacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01921575/c01921575.pdf p. 125
+Includes:
+  <acl.h> or <sys/acl.h>
+Library:
+  none needed
+Functions:
+  getacl
+  fgetacl
+  fsetacl
+  setacl
+Utilities:
+  lsacl
+  chacl
+  chmod
+
+
+HP-UX 11.11 ACLs
+
+Present in HP-UX >= 11.11.
+Manual pages:
+  acl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02254861/c02254861.pdf
+  acl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01921366/c01921366.pdf p. 27
+  aclsort: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02254876/c02254876.pdf
+  getacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02261501/c02261501.pdf
+  setacl: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02267385/c02267385.pdf
+Includes:
+  <aclv.h>
+Library:
+  none needed
+Functions:
+  acl
+  aclsort
+Utilities:
+  getacl
+  setacl
+
+
+IRIX ACLs
+
+Manual pages:
+  http://techpubs.sgi.com/library/tpl/cgi-bin/browse.cgi?cmd=search&db=man&srch=acl&coll=0650&range=0,133
+  http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=man&fname=/usr/share/catman/p_man/cat4/acl.z
+Includes:
+  <sys/acl.h>
+Library:
+  none needed
+Functions:
+  acl_add_perm
+  acl_calc_mask
+  acl_clear_perms
+  acl_copy_entry
+  acl_copy_ext
+  acl_copy_int
+  acl_create_entry
+  acl_delete_def_file
+  acl_delete_entry
+  acl_delete_perm
+  acl_dup
+  acl_free
+  acl_from_text
+  acl_get_entry
+  acl_get_fd
+  acl_get_file
+  acl_get_permset
+  acl_get_qualifier
+  acl_get_tag_type
+  acl_init
+  acl_set_fd
+  acl_set_file
+  acl_set_permset
+  acl_set_qualifier
+  acl_set_tag_type
+  acl_size
+  acl_to_short_text
+  acl_to_text
+  acl_valid
+Utilities:
+  chacl
+
+
+Tru64 ACLs
+
+Manual pages:
+  http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V51_HTML/MAN/MAN4/0083____.HTM
+Includes:
+  <sys/acl.h>
+Library:
+  -lpacl
+Functions:
+  acl_add_perm
+  acl_clear_perm
+  acl_copy_entry
+  acl_copy_ext
+  acl_copy_int
+  acl_create_entry
+  acl_delete_def_fd
+  acl_delete_def_file
+  acl_delete_entry
+  acl_delete_perm
+  acl_dup
+  acl_first_entry
+  acl_free
+  acl_free_qualifier
+  acl_free_text
+  acl_from_text
+  acl_get_entry
+  acl_get_fd
+  acl_get_file
+  acl_get_permset
+  acl_get_qualifier
+  acl_get_tag_type
+  acl_init
+  acl_set_fd
+  acl_set_file
+  acl_set_permset
+  acl_set_qualifier
+  acl_set_tag_type
+  acl_size
+  acl_to_text
+  acl_valid
+Unportable functions:
+  acl_add_entry
+  acl_delete_access_fd
+  acl_delete_access_file
+  acl_delete_def_dir_fd
+  acl_delete_def_dir_file
+  acl_ext_to_text
+  acl_find_entry
+  acl_get
+  acl_mod_perm
+  acl_set
+  acl_to_fmt_text
+  allocate_acl_entry
+  convert_to_er
+  isaclprop
+Utilities:
+  getacl
+  setacl
+
+
+AIX ACLs
+
+Documentation:
+  http://publib.boulder.ibm.com/infocenter/systems/index.jsp?topic=/com.ibm.aix.security/doc/security/access_control_list.htm
+Introduction:
+  http://www1.uni-hamburg.de/RRZ/Software/AIX/ACL.htm
+Includes:
+  <acl.h> or <sys/acl.h>
+  <sys/access.h>
+Library:
+  none needed
+Functions:
+  acl_chg
+  acl_fchg
+  acl_fget
+  acl_fput
+  acl_fset
+  acl_get
+  acl_put
+  acl_set
+  chacl
+  fchacl
+  fstatacl
+  statacl
+Function in AIX 5.3:
+  aclx_convert
+  aclx_fget
+  aclx_fput
+  aclx_get
+  aclx_gettypeinfo
+  aclx_gettypes
+  aclx_print
+  aclx_printStr
+  aclx_put
+  aclx_scan
+  aclx_scanStr
+Utilities:
+  aclget
+  aclput
+  acledit
+
+
+NonStop Kernel ACLs
+
+Documentation:
+  http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c02492445/c02492445.pdf p. 249..260
+  http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c02128649/c02128649.pdf
+  http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c02128680/c02128680.pdf
+Includes:
+  <sys/acl.h>
+Library:
+  none needed
+Functions:
+  acl
+  aclsort
+Utilities:
+  getacl
+  setacl
+
+
+Cygwin ACLs
+
+Documentation:
+  http://www.cygwin.com/cygwin-ug-net/ntsec.html#ntsec-aclfuncs
+  acl-cygwin.txt
+Includes:
+  <sys/acl.h>
+Library:
+  none needed
+Functions:
+  acl
+  aclcheck
+  aclfrommode
+  aclfrompbits
+  aclfromtext
+  aclsort
+  acltomode
+  acltopbits
+  acltotext
+  facl
+  lacl
+Utilities:
+  getfacl
+  setfacl
+
+
+Win32 ACLs
+
+Introduction:
+  http://setacl.sourceforge.net/html/doc-basics.html
+Manual pages:
+  http://msdn.microsoft.com/en-us/library/aa374872(VS.85).aspx
+  http://msdn.microsoft.com/en-us/library/aa446659(VS.85).aspx
+  http://msdn.microsoft.com/en-us/library/aa374931(VS.85).aspx
+  http://en.wikipedia.org/wiki/Cacls
+Library:
+  ?
+Functions:
+  GetAclInformation
+  SetAclInformation
+  ...
+Utilities:
+  cacls
+