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./configure --enable-ctrls --with-modules=mod_ban
make clean
make
make install

mod_ban.c:33:23: mod_ctrls.h: No such file or directory
mod_ban.c:42:3: #error "ProFTPD 1.2.10rc1 or later required"
mod_ban.c:46:3: #error "Controls support required (use --enable-ctrls)"
mod_ban.c:73: error: parse error before "ban_acttab"
mod_ban.c:73: warning: type defaults to `int' in declaration of `ban_acttab'
mod_ban.c:73: warning: data definition has no type or storage class
mod_ban.c: In function `ban_get_key':
mod_ban.c:150: warning: implicit declaration of function `pr_log_writefile'
mod_ban.c: In function `ban_send_mesg':
mod_ban.c:308: error: structure has no member named `cls_name'
mod_ban.c: In function `ban_list_add':
mod_ban.c:359: warning: implicit declaration of function `pr_event_generate'
mod_ban.c: At top level:
mod_ban.c:669: error: parse error before '*' token
mod_ban.c: In function `ban_handle_ban':
mod_ban.c:674: warning: implicit declaration of function `ctrls_check_acl'
mod_ban.c:674: error: `ctrl' undeclared (first use in this function)
mod_ban.c:674: error: (Each undeclared identifier is reported only once
mod_ban.c:674: error: for each function it appears in.)
mod_ban.c:677: warning: implicit declaration of function `pr_ctrls_add_response'
mod_ban.c:682: error: `reqargv' undeclared (first use in this function)
mod_ban.c:698: error: `reqargc' undeclared (first use in this function)
mod_ban.c:716: warning: implicit declaration of function `pr_strtime'
mod_ban.c: At top level:
mod_ban.c:1009: error: parse error before '*' token
mod_ban.c: In function `ban_handle_permit':
mod_ban.c:1014: error: `ctrl' undeclared (first use in this function)
mod_ban.c:1022: error: `reqargc' undeclared (first use in this function)
mod_ban.c:1022: error: `reqargv' undeclared (first use in this function)
mod_ban.c: In function `ban_pre_pass':
mod_ban.c:1177: error: structure has no member named `sid'
mod_ban.c:1178: warning: implicit declaration of function `pr_log_pri'
mod_ban.c: In function `set_banctrlsacls':
mod_ban.c:1200: warning: implicit declaration of function `ctrls_parse_acl'
mod_ban.c:1200: warning: assignment makes pointer from integer without a cast
mod_ban.c:1212: warning: implicit declaration of function `ctrls_set_module_acls
'
mod_ban.c:1213: warning: assignment makes pointer from integer without a cast
mod_ban.c: In function `set_banonevent':
mod_ban.c:1297: warning: implicit declaration of function `pr_event_register'
mod_ban.c: In function `ban_exit_ev':
mod_ban.c:1384: warning: implicit declaration of function `pr_log_debug'
mod_ban.c: In function `ban_handle_event':
mod_ban.c:1408: error: structure has no member named `sid'
mod_ban.c:1412: error: structure has no member named `sid'
mod_ban.c:1422: error: structure has no member named `sid'
mod_ban.c:1434: error: structure has no member named `sid'
mod_ban.c: In function `ban_postparse_ev':
mod_ban.c:1577: warning: implicit declaration of function `pr_log_openfile'
mod_ban.c: In function `ban_restart_ev':
mod_ban.c:1640: warning: implicit declaration of function `pr_pool_tag'
mod_ban.c:1643: error: request for member `act_action' in something not a struct
ure or union
mod_ban.c:1646: error: request for member `act_acl' in something not a structure
 or union
mod_ban.c:1646: error: `ctrls_acl_t' undeclared (first use in this function)
mod_ban.c:1647: warning: implicit declaration of function `ctrls_init_acl'
mod_ban.c:1647: error: request for member `act_acl' in something not a structure
 or union
mod_ban.c:1651: warning: implicit declaration of function `pr_event_unregister'
mod_ban.c: In function `ban_init':
mod_ban.c:1735: error: request for member `act_action' in something not a struct
ure or union
mod_ban.c:1738: error: request for member `act_acl' in something not a structure
 or union
mod_ban.c:1738: error: `ctrls_acl_t' undeclared (first use in this function)
mod_ban.c:1739: error: request for member `act_acl' in something not a structure
 or union
mod_ban.c:1741: warning: implicit declaration of function `pr_ctrls_register'
mod_ban.c:1741: error: request for member `act_action' in something not a struct
ure or union
mod_ban.c:1742: error: request for member `act_desc' in something not a structur
e or union
mod_ban.c:1742: error: request for member `act_cb' in something not a structure
or union
mod_ban.c:1745: error: request for member `act_action' in something not a struct
ure or union
mod_ban.c: In function `ban_sess_init':
mod_ban.c:1758: error: structure has no member named `cls_name'
mod_ban.c:1768: error: structure has no member named `sid'
mod_ban.c:1780: error: structure has no member named `sid'
mod_ban.c: At top level:
mod_ban.c:1801: error: parse error before "ban_acttab"
mod_ban.c:1801: warning: type defaults to `int' in declaration of `ban_acttab'
mod_ban.c:1802: warning: braces around scalar initializer
mod_ban.c:1802: warning: (near initialization for `ban_acttab[0]')
mod_ban.c:1802: warning: initialization makes integer from pointer without a cas
t
mod_ban.c:1802: warning: excess elements in scalar initializer
mod_ban.c:1802: warning: (near initialization for `ban_acttab[0]')
mod_ban.c:1802: warning: excess elements in scalar initializer
mod_ban.c:1802: warning: (near initialization for `ban_acttab[0]')
mod_ban.c:1803: warning: excess elements in scalar initializer
mod_ban.c:1803: warning: (near initialization for `ban_acttab[0]')
mod_ban.c:1804: warning: braces around scalar initializer
mod_ban.c:1804: warning: (near initialization for `ban_acttab[1]')
mod_ban.c:1804: warning: initialization makes integer from pointer without a cas
t
mod_ban.c:1804: warning: excess elements in scalar initializer
mod_ban.c:1804: warning: (near initialization for `ban_acttab[1]')
mod_ban.c:1804: warning: excess elements in scalar initializer
mod_ban.c:1804: warning: (near initialization for `ban_acttab[1]')
mod_ban.c:1805: warning: excess elements in scalar initializer
mod_ban.c:1805: warning: (near initialization for `ban_acttab[1]')
mod_ban.c:1806: warning: braces around scalar initializer
mod_ban.c:1806: warning: (near initialization for `ban_acttab[2]')
mod_ban.c:1806: warning: initialization makes integer from pointer without a cas
t
mod_ban.c:1806: warning: excess elements in scalar initializer
mod_ban.c:1806: warning: (near initialization for `ban_acttab[2]')
mod_ban.c:1806: warning: excess elements in scalar initializer
mod_ban.c:1806: warning: (near initialization for `ban_acttab[2]')
mod_ban.c:1806: warning: excess elements in scalar initializer
mod_ban.c:1806: warning: (near initialization for `ban_acttab[2]')
mod_ban.c:1807: warning: data definition has no type or storage class
make[1]: *** [mod_ban.o] Error 1
make[1]: Leaving directory `/etc/proftpd/proftpd-1.2.9/modules'
make: *** [modules] Error 2

Installation

 To install mod_ban, copy the mod_ban.c file into:
  proftpd-dir/contrib/

after unpacking the latest proftpd-1.2.x source code. Then follow the usual steps for using third-party modules in proftpd, making sure to include the --enable-ctrls configure option, which mod_ban requires:
  ./configure --enable-ctrls --with-modules=mod_ban
  make
  make install