cf_file.c File Reference

Read the radiusd.conf file. More...

#include <sys/errno.h>
#include <freeradius-devel/server/cf_file.h>
#include <freeradius-devel/server/cf_priv.h>
#include <freeradius-devel/server/log.h>
#include <freeradius-devel/server/tmpl.h>
#include <freeradius-devel/server/util.h>
#include <freeradius-devel/server/virtual_servers.h>
#include <freeradius-devel/util/debug.h>
#include <freeradius-devel/util/file.h>
#include <freeradius-devel/util/misc.h>
#include <freeradius-devel/util/perm.h>
#include <freeradius-devel/util/skip.h>
#include <freeradius-devel/util/md5.h>
#include <fcntl.h>
#include <freeradius-devel/server/main_config.h>

Include dependency graph for cf_file.c:

Go to the source code of this file.

Data Structures
struct	cf_file_heap_t
struct	cf_stack_frame_t
union	cf_stack_frame_t.__unnamed62__
struct	cf_stack_frame_t.__unnamed62__.__unnamed64__
struct	cf_stack_t

Macros
#define	MAX_STACK   (32)

Typedefs
typedef struct cf_file_heap_t	cf_file_heap_t
typedef CONF_ITEM *(*	cf_process_func_t) (cf_stack_t *)
typedef enum conf_property	CONF_PROPERTY

Enumerations
enum	cf_stack_file_t { CF_STACK_FILE = 0 }
enum	conf_property {   CONF_PROPERTY_INVALID = 0 ,   CONF_PROPERTY_NAME ,   CONF_PROPERTY_INSTANCE }

Functions
static int8_t	_inode_cmp (void const *one, void const *two)
static int	add_pair (CONF_SECTION *parent, char const *attr, char const *value, fr_token_t name1_token, fr_token_t op_token, fr_token_t value_token, char *buff, char const *filename, int lineno)
static int	cf_expand_file (char const *cf, int lineno, char name[static PATH_MAX], char **p_p, char const **ptr_p, char *output, size_t outsize, bool raw)
char const *	cf_expand_variables (char const *cf, int lineno, CONF_SECTION *outer_cs, char *output, size_t outsize, char const *input, ssize_t inlen, bool *soft_fail, bool soft_fail_env)
cf_file_check_err_t	cf_file_check (CONF_PAIR *cp, bool check_perms)
	Do some checks on the file as an "input" file.
cf_file_check_err_t	cf_file_check_effective (char const *filename, cf_file_check_err_t(*cb)(char const *filename, void *uctx), void *uctx)
	Perform an operation with the effect/group set to conf_check_gid and conf_check_uid.
cf_file_check_err_t	cf_file_check_open_read (char const *filename, void *uctx)
	Callback for cf_file_check to open a file and check permissions.
void	cf_file_check_set_uid_gid (uid_t uid, gid_t gid)
	Set the euid/egid used when performing file checks.
cf_file_check_err_t	cf_file_check_unix_connect (char const *filename, UNUSED void *uctx)
	Check if we can connect to a unix socket.
cf_file_check_err_t	cf_file_check_unix_perm (char const *filename, UNUSED void *uctx)
	Check if file exists, and is a socket.
static int	cf_file_fill (cf_stack_t *stack)
void	cf_file_free (CONF_SECTION *cs)
static int	cf_file_include (cf_stack_t *stack)
static int	cf_file_open (CONF_SECTION *cs, char const *filename, bool from_dir, FILE **fp_p)
int	cf_file_read (CONF_SECTION *cs, char const *filename, bool root)
int	cf_file_read_buffer (CONF_SECTION *cs, char const *buffer, size_t buflen, char const *filename)
	Bootstrap a configuration section from an in-memory buffer.
static int	cf_get_token (CONF_SECTION *parent, char const **ptr_p, fr_token_t *token, char *buffer, size_t buflen, char const *filename, int lineno)
static char const *	cf_local_file (char const *base, char const *filename, char *buffer, size_t bufsize)
void	cf_md5_final (uint8_t *digest)
void	cf_md5_init (void)
static void	cf_md5_update (char const *p)
int	cf_pair_write (FILE *fp, CONF_PAIR *cp)
CONF_ITEM *	cf_reference_item (CONF_SECTION const *parent_cs, CONF_SECTION const *outer_cs, char const *ptr)
int	cf_section_pass2 (CONF_SECTION *cs)
void	cf_section_set_unlang (CONF_SECTION *cs)
int	cf_section_write (FILE *fp, CONF_SECTION *cs, int depth)
int	cf_section_write_children (FILE *fp, CONF_SECTION *cs, int depth)
	Emit the children of a section at depth without an enclosing { ... }.
static void	cf_stack_cleanup (cf_stack_t *stack)
static ssize_t	cf_string_write (FILE *fp, char const *string, size_t len, fr_token_t t)
static bool	cf_template_merge (CONF_SECTION *cs, CONF_SECTION const *template)
static int8_t	filename_cmp (void const *one, void const *two)
static int	frame_readdir (cf_stack_t *stack)
static int	parse_error (cf_stack_t *stack, char const *ptr, char const *message)
static int	parse_input (cf_stack_t *stack)
static int	parse_type_name (cf_stack_t *stack, char const **ptr_p, char const *type_ptr, fr_type_t *type_p)
static CONF_ITEM *	process_catch (cf_stack_t *stack)
static CONF_ITEM *	process_foreach (cf_stack_t *stack)
static CONF_ITEM *	process_if (cf_stack_t *stack)
static int	process_include (cf_stack_t *stack, CONF_SECTION *parent, char const *ptr, bool required, bool relative)
static CONF_ITEM *	process_map (cf_stack_t *stack)
static CONF_ITEM *	process_subrequest (cf_stack_t *stack)
static CONF_ITEM *	process_switch (cf_stack_t *stack)
static int	process_template (cf_stack_t *stack)

Variables
static fr_md5_ctx_t *	cf_md5_ctx = NULL
static const bool	cf_name_char1 [SBUFF_CHAR_CLASS]
	Convert tokens back to a quoting character.
bool	check_config = false
static gid_t	conf_check_gid = (gid_t)-1
static uid_t	conf_check_uid = (uid_t)-1
static fr_table_num_sorted_t const	conf_property_name []
static size_t	conf_property_name_len = NUM_ELEMENTS(conf_property_name)
static char const	parse_tabs [] = " "
static fr_table_num_sorted_t const	server_unlang_section []
static size_t	server_unlang_section_len = NUM_ELEMENTS(server_unlang_section)
static const bool	terminal_end_line [SBUFF_CHAR_CLASS]
static const bool	terminal_end_section [SBUFF_CHAR_CLASS]
static fr_table_ptr_sorted_t	unlang_keywords []
static int	unlang_keywords_len = NUM_ELEMENTS(unlang_keywords)

Detailed Description

Read the radiusd.conf file.

Id

024dd68b013e511162487ccf31ed9ca14a93e569

Note

Yep I should learn to use lex & yacc, or at least write a decent parser. I know how to do that, really :) mique.nosp@m.ls@c.nosp@m.istro.nosp@m.n.nl

Copyright

2017 Arran Cudbard-Bell (a.cud.nosp@m.bard.nosp@m.b@fre.nosp@m.erad.nosp@m.ius.o.nosp@m.rg)

2000,2006 The FreeRADIUS server project

2000 Miquel van Smoorenburg (mique.nosp@m.ls@c.nosp@m.istro.nosp@m.n.nl)

2000 Alan DeKok (aland.nosp@m.@fre.nosp@m.eradi.nosp@m.us.o.nosp@m.rg)

Definition in file cf_file.c.

---

Data Structure Documentation

cf_file_heap_t

struct cf_file_heap_t

Definition at line 1243 of file cf_file.c.

Data Fields
char const *	filename
fr_heap_index_t	heap_id

cf_stack_frame_t

struct cf_stack_frame_t

Definition at line 106 of file cf_file.c.

Collaboration diagram for cf_stack_frame_t:

Data Fields
union cf_stack_frame_t.__unnamed62__	__unnamed__
CONF_SECTION *	at_reference	was this thing an @foo ?
int	at_reference_braces	braces when we found this thing
int	braces
CONF_SECTION *	current	sub-section we're reading
char const *	filename	filename we're reading
bool	from_dir	this file was read from $include foo/
int	lineno	line in that filename
CONF_SECTION *	parent	which started this file
cf_stack_file_t	type

cf_stack_frame_t.__unnamed62__

union cf_stack_frame_t.__unnamed62__

Definition at line 112 of file cf_file.c.

Data Fields
struct cf_stack_frame_t.__unnamed62__.__unnamed64__	__unnamed__

cf_stack_frame_t.__unnamed62__.__unnamed64__

struct cf_stack_frame_t.__unnamed62__.__unnamed64__

Definition at line 113 of file cf_file.c.

Data Fields
FILE *	fp	FP we're reading.

cf_stack_t

struct cf_stack_t

Definition at line 148 of file cf_file.c.

Collaboration diagram for cf_stack_t:

Data Fields
char **	buff	buffers for reading / parsing
size_t	bufsize	size of the buffers
int	depth	stack depth
char *	fill	where we start filling the buffer from
cf_stack_frame_t	frame[MAX_STACK]	stack frames
char const *	ptr	current parse pointer

Macro Definition Documentation

MAX_STACK

#define MAX_STACK   (32)

Definition at line 105 of file cf_file.c.

Typedef Documentation

cf_file_heap_t

typedef struct cf_file_heap_t cf_file_heap_t

cf_process_func_t

typedef CONF_ITEM *(* cf_process_func_t) (cf_stack_t *)

Definition at line 2482 of file cf_file.c.

CONF_PROPERTY

typedef enum conf_property CONF_PROPERTY

Enumeration Type Documentation

cf_stack_file_t

enum cf_stack_file_t

Enumerator
CF_STACK_FILE

Definition at line 95 of file cf_file.c.

conf_property

enum conf_property

Enumerator
CONF_PROPERTY_INVALID
CONF_PROPERTY_NAME
CONF_PROPERTY_INSTANCE

Definition at line 65 of file cf_file.c.

Function Documentation

_inode_cmp()

static int8_t _inode_cmp ( void const *  one, void const *  two  )

static

Definition at line 704 of file cf_file.c.

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add_pair()

static int add_pair ( CONF_SECTION *  parent, char const *  attr, char const *  value, fr_token_t  name1_token, fr_token_t  op_token, fr_token_t  value_token, char *  buff, char const *  filename, int  lineno  )

static

Definition at line 2320 of file cf_file.c.

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cf_expand_file()

static int cf_expand_file ( char const *  cf, int  lineno, char  name[static PATH_MAX], char **  p_p, char const **  ptr_p, char *  output, size_t  outsize, bool  raw  )

static

Definition at line 160 of file cf_file.c.

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cf_expand_variables()

char const * cf_expand_variables	(	char const *	cf,
		int	lineno,
		CONF_SECTION *	outer_cs,
		char *	output,
		size_t	outsize,
		char const *	input,
		ssize_t	inlen,
		bool *	soft_fail,
		bool	soft_fail_env
	)

Definition at line 297 of file cf_file.c.

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cf_file_check()

cf_file_check_err_t cf_file_check	(	CONF_PAIR *	cp,
		bool	check_perms
	)

Do some checks on the file as an "input" file.

i.e. one read by a module.

Note

Must be called with super user privileges.

Parameters

cp	currently being processed.
check_perms	If true - will return error if file is world readable, or not readable by the unprivileged user/group.

Returns

• CF_FILE_OK if the socket exists and is a socket.
• CF_FILE_NO_EXIST if the file doesn't exist.
• CF_FILE_NO_PERMISSION if the file exists but is not accessible.
• CF_FILE_OTHER_ERROR any other error.

Definition at line 1068 of file cf_file.c.

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cf_file_check_effective()

cf_file_check_err_t cf_file_check_effective	(	char const *	filename,
		cf_file_check_err_t(*)(char const *filename, void *uctx)	cb,
		void *	uctx
	)

Perform an operation with the effect/group set to conf_check_gid and conf_check_uid.

Parameters

filename	CONF_PAIR for the file being checked
cb	callback function to perform the check
uctx	user context for the callback

Returns

• CF_FILE_OTHER_ERROR if there was a problem modifying permissions
• The return value from the callback

Definition at line 839 of file cf_file.c.

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cf_file_check_open_read()

cf_file_check_err_t cf_file_check_open_read	(	char const *	filename,
		void *	uctx
	)

Callback for cf_file_check to open a file and check permissions.

This is used to check if a file exists, and is readable by the unprivileged user/group.

Parameters

filename	currently being processed.
uctx	user context, which is a pointer to cf_file_t

Returns

• CF_FILE_OK if the file exists and is readable.
• CF_FILE_NO_EXIST if the file does not exist.
• CF_FILE_NO_PERMISSION if the file exists but is not accessible.
• CF_FILE_OTHER_ERROR if there was any other error.

Definition at line 1018 of file cf_file.c.

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cf_file_check_set_uid_gid()

void cf_file_check_set_uid_gid	(	uid_t	uid,
		gid_t	gid
	)

Set the euid/egid used when performing file checks.

Sets the euid, and egid used when cf_file_check is called to check permissions on conf items of type CONF_FLAG_FILE_READABLE

Note

This is probably only useful for the freeradius daemon itself.

Parameters

uid	to set, (uid_t)-1 to use current euid.
gid	to set, (gid_t)-1 to use current egid.

Definition at line 824 of file cf_file.c.

cf_file_check_unix_connect()

cf_file_check_err_t cf_file_check_unix_connect	(	char const *	filename,
		UNUSED void *	uctx
	)

Check if we can connect to a unix socket.

Parameters

[in]	filename	CONF_PAIR for the unix socket path
[in]	uctx	user context, not used

Returns

• CF_FILE_OK if the socket exists and is a socket.
• CF_FILE_NO_EXIST if the file doesn't exist.
• CF_FILE_NO_PERMISSION if the file exists but is not accessible.
• CF_FILE_NO_UNIX_SOCKET if the file exists but is not a socket.
• CF_FILE_OTHER_ERROR any other error.

Definition at line 899 of file cf_file.c.

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cf_file_check_unix_perm()

cf_file_check_err_t cf_file_check_unix_perm	(	char const *	filename,
		UNUSED void *	uctx
	)

Check if file exists, and is a socket.

Parameters

[in]	filename	CONF_PAIR for the unix socket path
[in]	uctx	user context, not used

Returns

• CF_FILE_OK if the socket exists and is a socket.
• CF_FILE_NO_EXIST if the file doesn't exist.
• CF_FILE_NO_PERMISSION if the file exists but is not accessible.
• CF_FILE_NO_UNIX_SOCKET if the file exists but is not a socket.
• CF_FILE_OTHER_ERROR any other error.

Definition at line 972 of file cf_file.c.

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cf_file_fill()

static int cf_file_fill ( cf_stack_t *  stack )

static

Definition at line 3509 of file cf_file.c.

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cf_file_free()

void cf_file_free

(

CONF_SECTION *

cs

)

Definition at line 4039 of file cf_file.c.

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cf_file_include()

static int cf_file_include ( cf_stack_t *  stack )

static

Definition at line 3650 of file cf_file.c.

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cf_file_open()

static int cf_file_open ( CONF_SECTION *  cs, char const *  filename, bool  from_dir, FILE **  fp_p  )

static

Definition at line 713 of file cf_file.c.

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cf_file_read()

int cf_file_read	(	CONF_SECTION *	cs,
		char const *	filename,
		bool	root
	)

Definition at line 3866 of file cf_file.c.

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cf_file_read_buffer()

int cf_file_read_buffer	(	CONF_SECTION *	cs,
		char const *	buffer,
		size_t	buflen,
		char const *	filename
	)

Bootstrap a configuration section from an in-memory buffer.

Mirrors cf_file_read(), but reads the configuration text from a buffer via fmemopen() instead of from a file on disk. The buffer is treated as if it were the contents of "filename", which is used in error messages and stored as the section's source filename.

$INCLUDE / $-INCLUDEs are taken relative to the directory portion of "filename", as with cf_file_read().

Unlike cf_file_read(), this function never sets the "raddbdir" / "confdir" CONF_PAIRs (the buffer has no canonical install path) and never inserts "filename" into the dedup tree.

Parameters

[in]	cs	Top-level configuration section to populate.
[in]	buffer	The configuration text. The caller retains ownership and may free the buffer after this call returns.
[in]	buflen	Length of buffer in bytes (excluding any trailing NUL).
[in]	filename	Virtual filename for error reporting. May be a placeholder like "<inline>" if there is no real file.

Returns

0 on success, -1 on failure.

Definition at line 3967 of file cf_file.c.

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cf_get_token()

static int cf_get_token ( CONF_SECTION *  parent, char const **  ptr_p, fr_token_t *  token, char *  buffer, size_t  buflen, char const *  filename, int  lineno  )

static

Definition at line 1194 of file cf_file.c.

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cf_local_file()

static char const * cf_local_file ( char const *  base, char const *  filename, char *  buffer, size_t  bufsize  )

static

Definition at line 1165 of file cf_file.c.

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cf_md5_final()

void cf_md5_final

(

uint8_t *

digest

)

Definition at line 3497 of file cf_file.c.

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cf_md5_init()

void cf_md5_init

(

void

)

Definition at line 3484 of file cf_file.c.

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cf_md5_update()

static void cf_md5_update ( char const *  p )

static

Definition at line 3490 of file cf_file.c.

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cf_pair_write()

int cf_pair_write	(	FILE *	fp,
		CONF_PAIR *	cp
	)

Definition at line 4079 of file cf_file.c.

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cf_reference_item()

CONF_ITEM * cf_reference_item	(	CONF_SECTION const *	parent_cs,
		CONF_SECTION const *	outer_cs,
		char const *	ptr
	)

Definition at line 4211 of file cf_file.c.

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cf_section_pass2()

int cf_section_pass2

(

CONF_SECTION *

cs

)

Definition at line 1130 of file cf_file.c.

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cf_section_set_unlang()

void cf_section_set_unlang

(

CONF_SECTION *

cs

)

Definition at line 4449 of file cf_file.c.

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cf_section_write()

int cf_section_write	(	FILE *	fp,
		CONF_SECTION *	cs,
		int	depth
	)

Definition at line 4095 of file cf_file.c.

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cf_section_write_children()

int cf_section_write_children	(	FILE *	fp,
		CONF_SECTION *	cs,
		int	depth
	)

Emit the children of a section at depth without an enclosing { ... }.

cf_section_write wraps a section in name { ... }; this helper writes only the children at the requested indent, which is what tools like radjson2conf -r need: rendering a synthetic-root section as a file-scope fragment ready to be $INCLUDEd at any depth.

Blank lines in the source come back through as NULL-text CONF_ITEM_COMMENT markers, so the writer doesn't have to synthesise its own separators - just emit what's there. Consecutive blank markers collapse to a single blank line on output so artifacts from upstream tooling (deletes that left their preceding blank behind, splits that introduced extra spacers) don't accumulate as visible whitespace.

Definition at line 4150 of file cf_file.c.

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cf_stack_cleanup()

static void cf_stack_cleanup ( cf_stack_t *  stack )

static

Definition at line 3832 of file cf_file.c.

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cf_string_write()

static ssize_t cf_string_write ( FILE *  fp, char const *  string, size_t  len, fr_token_t  t  )

static

Definition at line 4046 of file cf_file.c.

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cf_template_merge()

static bool cf_template_merge ( CONF_SECTION *  cs, CONF_SECTION const *  template  )

static

Definition at line 628 of file cf_file.c.

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filename_cmp()

static int8_t filename_cmp ( void const *  one, void const *  two  )

static

Definition at line 1248 of file cf_file.c.

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frame_readdir()

static int frame_readdir ( cf_stack_t *  stack )

static

Definition at line 3447 of file cf_file.c.

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parse_error()

static int parse_error ( cf_stack_t *  stack, char const *  ptr, char const *  message  )

static

Definition at line 2064 of file cf_file.c.

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parse_input()

static int parse_input ( cf_stack_t *  stack )

static

Definition at line 2506 of file cf_file.c.

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parse_type_name()

static int parse_type_name ( cf_stack_t *  stack, char const **  ptr_p, char const *  type_ptr, fr_type_t *  type_p  )

static

Definition at line 2084 of file cf_file.c.

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process_catch()

static CONF_ITEM * process_catch ( cf_stack_t *  stack )

static

Definition at line 1972 of file cf_file.c.

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process_foreach()

static CONF_ITEM * process_foreach ( cf_stack_t *  stack )

static

Definition at line 2135 of file cf_file.c.

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process_if()

static CONF_ITEM * process_if ( cf_stack_t *  stack )

static

Definition at line 1612 of file cf_file.c.

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process_include()

static int process_include ( cf_stack_t *  stack, CONF_SECTION *  parent, char const *  ptr, bool  required, bool  relative  )

static

Definition at line 1259 of file cf_file.c.

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process_map()

static CONF_ITEM * process_map ( cf_stack_t *  stack )

static

Definition at line 1763 of file cf_file.c.

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process_subrequest()

static CONF_ITEM * process_subrequest ( cf_stack_t *  stack )

static

Definition at line 1851 of file cf_file.c.

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process_switch()

static CONF_ITEM * process_switch ( cf_stack_t *  stack )

static

Definition at line 2379 of file cf_file.c.

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process_template()

static int process_template ( cf_stack_t *  stack )

static

Definition at line 1539 of file cf_file.c.

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Variable Documentation

cf_md5_ctx

fr_md5_ctx_t* cf_md5_ctx = NULL

static

Definition at line 3482 of file cf_file.c.

cf_name_char1

const bool cf_name_char1[SBUFF_CHAR_CLASS]

static

Initial value:

= {
        [ '0' ... '9' ] = true,
        [ 'A' ... 'Z' ] = true,
        [ 'a' ... 'z' ] = true,
        [ '%' ] = true,                 
        [ '@' ] = true,                 
        [ '-' ] = true,                 
        [ '&' ] = true,                 
}

Convert tokens back to a quoting character.

Non-string types convert to '?' to screw ups can be identified easily

Definition at line 2495 of file cf_file.c.

check_config

bool check_config = false

Definition at line 61 of file cf_file.c.

conf_check_gid

gid_t conf_check_gid = (gid_t)-1

static

Definition at line 63 of file cf_file.c.

conf_check_uid

uid_t conf_check_uid = (uid_t)-1

static

Definition at line 62 of file cf_file.c.

conf_property_name

fr_table_num_sorted_t const conf_property_name[]

static

Initial value:

= {
        { L("instance"),        CONF_PROPERTY_INSTANCE  },
        { L("name"),    CONF_PROPERTY_NAME      }
}

Definition at line 71 of file cf_file.c.

conf_property_name_len

size_t conf_property_name_len = NUM_ELEMENTS(conf_property_name)

static

Definition at line 75 of file cf_file.c.

parse_tabs

char const parse_tabs[] = " "

static

Definition at line 4044 of file cf_file.c.

server_unlang_section

fr_table_num_sorted_t const server_unlang_section[]

static

Initial value:

= {
        { L("accounting"),      true },
        { L("add"),             true },
        { L("authenticate"),    true },
        { L("clear"),           true },
        { L("deny"),            true },
        { L("error"),           true },
        { L("establish"),       true },
        { L("finally"),         true },
        { L("load"),            true },
        { L("new"),             true },
        { L("recv"),            true },
        { L("send"),            true },
        { L("store"),           true },
        { L("verify"),          true },
}

Definition at line 77 of file cf_file.c.

server_unlang_section_len

size_t server_unlang_section_len = NUM_ELEMENTS(server_unlang_section)

static

Definition at line 93 of file cf_file.c.

terminal_end_line

const bool terminal_end_line[SBUFF_CHAR_CLASS]

static

Initial value:

= {
        [0] = true,
 
        ['\r'] = true,
        ['\n'] = true,
 
        ['#'] = true,
        [','] = true,
        [';'] = true,
        ['}'] = true,
}

Definition at line 1600 of file cf_file.c.

terminal_end_section

const bool terminal_end_section[SBUFF_CHAR_CLASS]

static

Initial value:

= {
        ['{'] = true,
}

Definition at line 1596 of file cf_file.c.

unlang_keywords

fr_table_ptr_sorted_t unlang_keywords[]

static

Initial value:

= {
        { L("catch"),           (void *) process_catch },
        { L("elsif"),           (void *) process_if },
        { L("foreach"),         (void *) process_foreach },
        { L("if"),              (void *) process_if },
        { L("map"),             (void *) process_map },
        { L("subrequest"),      (void *) process_subrequest },
        { L("switch"),          (void *) process_switch }
}

Definition at line 2471 of file cf_file.c.

unlang_keywords_len

int unlang_keywords_len = NUM_ELEMENTS(unlang_keywords)

static

Definition at line 2480 of file cf_file.c.