DBusString class

DBusString data structure for safer string handling. More...

Macros
#define	DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at)
	Checks assertions for two strings we're copying a segment between, and declares real_source/real_dest variables.
#define	UTF8_COMPUTE(Char, Mask, Len)
	computes length and mask of a unicode character
#define	UTF8_LENGTH(Char)
	computes length of a unicode character in UTF-8
#define	UTF8_GET(Result, Chars, Count, Mask, Len)
	Gets a UTF-8 value.
#define	UNICODE_VALID(Char)
	Check whether a Unicode (5.2) char is in a valid range.

Functions
dbus_bool_t	_dbus_string_ends_with_c_str (const DBusString *a, const char *c_str)
	Returns whether a string ends with the given suffix.
dbus_bool_t	_dbus_string_find_byte_backward (const DBusString *str, int start, unsigned char byte, int *found)
	Find the given byte scanning backward from the given start.
dbus_bool_t	_dbus_string_init_preallocated (DBusString *str, int allocate_size)
	Initializes a string that can be up to the given allocation size before it has to realloc.
dbus_bool_t	_dbus_string_init (DBusString *str)
	Initializes a string.
void	_dbus_string_init_const (DBusString *str, const char *value)
	Initializes a constant string.
void	_dbus_string_init_const_len (DBusString *str, const char *value, int len)
	Initializes a constant string with a length.
dbus_bool_t	_dbus_string_init_from_string (DBusString *str, const DBusString *from)
	Initializes a string from another string.
void	_dbus_string_free (DBusString *str)
	Frees a string created by _dbus_string_init(), and fills it with the same contents as _DBUS_STRING_INIT_INVALID.
dbus_bool_t	_dbus_string_compact (DBusString *str, int max_waste)
	Compacts the string to avoid wasted memory.
int	_dbus_string_get_allocated_size (const DBusString *str)
	Returns the allocated size of the string.
char *	_dbus_string_get_data_len (DBusString *str, int start, int len)
	Gets a sub-portion of the raw character buffer from the string.
dbus_bool_t	_dbus_string_insert_bytes (DBusString *str, int i, int n_bytes, unsigned char byte)
	Inserts a number of bytes of a given value at the given position.
dbus_bool_t	_dbus_string_insert_byte (DBusString *str, int i, unsigned char byte)
	Inserts a single byte at the given position.
dbus_bool_t	_dbus_string_steal_data (DBusString *str, char **data_return)
	Like _dbus_string_get_data(), but removes the gotten data from the original string.
dbus_bool_t	_dbus_string_copy_data (const DBusString *str, char **data_return)
	Copies the data from the string into a char*.
void	_dbus_string_copy_to_buffer (const DBusString *str, char *buffer, int avail_len)
	Copies the contents of a DBusString into a different buffer.
void	_dbus_string_copy_to_buffer_with_nul (const DBusString *str, char *buffer, int avail_len)
	Copies the contents of a DBusString into a different buffer.
dbus_bool_t	_dbus_string_lengthen (DBusString *str, int additional_length)
	Makes a string longer by the given number of bytes.
void	_dbus_string_shorten (DBusString *str, int length_to_remove)
	Makes a string shorter by the given number of bytes.
dbus_bool_t	_dbus_string_set_length (DBusString *str, int length)
	Sets the length of a string.
dbus_bool_t	_dbus_string_align_length (DBusString *str, int alignment)
	Align the length of a string to a specific alignment (typically 4 or 8) by appending nul bytes to the string.
dbus_bool_t	_dbus_string_alloc_space (DBusString *str, int extra_bytes)
	Preallocate extra_bytes such that a future lengthening of the string by extra_bytes is guaranteed to succeed without an out of memory error.
dbus_bool_t	_dbus_string_append (DBusString *str, const char *buffer)
	Appends a nul-terminated C-style string to a DBusString.
dbus_bool_t	_dbus_string_insert_2_aligned (DBusString *str, int insert_at, const unsigned char octets[2])
	Inserts 2 bytes aligned on a 2 byte boundary with any alignment padding initialized to 0.
dbus_bool_t	_dbus_string_insert_4_aligned (DBusString *str, int insert_at, const unsigned char octets[4])
	Inserts 4 bytes aligned on a 4 byte boundary with any alignment padding initialized to 0.
dbus_bool_t	_dbus_string_insert_8_aligned (DBusString *str, int insert_at, const unsigned char octets[8])
	Inserts 8 bytes aligned on an 8 byte boundary with any alignment padding initialized to 0.
dbus_bool_t	_dbus_string_insert_alignment (DBusString *str, int *insert_at, int alignment)
	Inserts padding at *insert_at such to align it to the given boundary.
dbus_bool_t	_dbus_string_append_printf_valist (DBusString *str, const char *format, va_list args)
	Appends a printf-style formatted string to the DBusString.
dbus_bool_t	_dbus_string_append_printf (DBusString *str, const char *format,...)
	Appends a printf-style formatted string to the DBusString.
dbus_bool_t	_dbus_string_append_len (DBusString *str, const char *buffer, int len)
	Appends block of bytes with the given length to a DBusString.
dbus_bool_t	_dbus_string_append_byte (DBusString *str, unsigned char byte)
	Appends a single byte to the string, returning FALSE if not enough memory.
dbus_bool_t	_dbus_string_append_strings (DBusString *str, char **strings, char separator)
	Append vector with strings connected by separator.
void	_dbus_string_delete (DBusString *str, int start, int len)
	Deletes a segment of a DBusString with length len starting at start.
dbus_bool_t	_dbus_string_move (DBusString *source, int start, DBusString *dest, int insert_at)
	Moves the end of one string into another string.
dbus_bool_t	_dbus_string_copy (const DBusString *source, int start, DBusString *dest, int insert_at)
	Like _dbus_string_move(), but does not delete the section of the source string that's copied to the dest string.
dbus_bool_t	_dbus_string_move_len (DBusString *source, int start, int len, DBusString *dest, int insert_at)
	Like _dbus_string_move(), but can move a segment from the middle of the source string.
dbus_bool_t	_dbus_string_copy_len (const DBusString *source, int start, int len, DBusString *dest, int insert_at)
	Like _dbus_string_copy(), but can copy a segment from the middle of the source string.
dbus_bool_t	_dbus_string_replace_len (const DBusString *source, int start, int len, DBusString *dest, int replace_at, int replace_len)
	Replaces a segment of dest string with a segment of source string.
dbus_bool_t	_dbus_string_split_on_byte (DBusString *source, unsigned char byte, DBusString *tail)
	Looks for the first occurance of a byte, deletes that byte, and moves everything after the byte to the beginning of a separate string.
dbus_bool_t	_dbus_string_find (const DBusString *str, int start, const char *substr, int *found)
	Finds the given substring in the string, returning TRUE and filling in the byte index where the substring was found, if it was found.
dbus_bool_t	_dbus_string_find_eol (const DBusString *str, int start, int *found, int *found_len)
	Finds end of line ("\r\n" or "\n") in the string, returning TRUE and filling in the byte index where the eol string was found, if it was found.
dbus_bool_t	_dbus_string_find_to (const DBusString *str, int start, int end, const char *substr, int *found)
	Finds the given substring in the string, up to a certain position, returning TRUE and filling in the byte index where the substring was found, if it was found.
dbus_bool_t	_dbus_string_find_blank (const DBusString *str, int start, int *found)
	Finds a blank (space or tab) in the string.
void	_dbus_string_skip_blank (const DBusString *str, int start, int *end)
	Skips blanks from start, storing the first non-blank in *end (blank is space or tab).
void	_dbus_string_skip_white (const DBusString *str, int start, int *end)
	Skips whitespace from start, storing the first non-whitespace in *end.
void	_dbus_string_skip_white_reverse (const DBusString *str, int end, int *start)
	Skips whitespace from end, storing the start index of the trailing whitespace in *start.
dbus_bool_t	_dbus_string_pop_line (DBusString *source, DBusString *dest)
	Assigns a newline-terminated or \r\n-terminated line from the front of the string to the given dest string.
void	_dbus_string_chop_white (DBusString *str)
	Deletes leading and trailing whitespace.
dbus_bool_t	_dbus_string_equal (const DBusString *a, const DBusString *b)
	Tests two DBusString for equality.
dbus_bool_t	_dbus_string_equal_len (const DBusString *a, const DBusString *b, int len)
	Tests two DBusString for equality up to the given length.
dbus_bool_t	_dbus_string_equal_substring (const DBusString *a, int a_start, int a_len, const DBusString *b, int b_start)
	Tests two sub-parts of two DBusString for equality.
dbus_bool_t	_dbus_string_equal_c_str (const DBusString *a, const char *c_str)
	Checks whether a string is equal to a C string.
dbus_bool_t	_dbus_string_starts_with_c_str (const DBusString *a, const char *c_str)
	Checks whether a string starts with the given C string.
dbus_bool_t	_dbus_string_starts_with_words_c_str (const DBusString *a, const char *c_str, char word_separator)
	Checks whether a string starts with the given C string, after which it ends or is separated from the rest by a given separator character.
dbus_bool_t	_dbus_string_append_byte_as_hex (DBusString *str, unsigned char byte)
	Appends a two-character hex digit to a string, where the hex digit has the value of the given byte.
dbus_bool_t	_dbus_string_hex_encode (const DBusString *source, int start, DBusString *dest, int insert_at)
	Encodes a string in hex, the way MD5 and SHA-1 are usually encoded.
dbus_bool_t	_dbus_string_hex_decode (const DBusString *source, int start, int *end_return, DBusString *dest, int insert_at)
	Decodes a string from hex encoding.
dbus_bool_t	_dbus_string_validate_ascii (const DBusString *str, int start, int len)
	Checks that the given range of the string is valid ASCII with no nul bytes.
void	_dbus_string_tolower_ascii (const DBusString *str, int start, int len)
	Converts the given range of the string to lower case.
void	_dbus_string_toupper_ascii (const DBusString *str, int start, int len)
	Converts the given range of the string to upper case.
dbus_bool_t	_dbus_string_validate_utf8 (const DBusString *str, int start, int len)
	Checks that the given range of the string is valid UTF-8.
dbus_bool_t	_dbus_string_validate_nul (const DBusString *str, int start, int len)
	Checks that the given range of the string is all nul bytes.
void	_dbus_string_zero (DBusString *str)
	Clears all allocated bytes in the string to zero.
dbus_bool_t	_dbus_string_get_dirname (const DBusString *filename, DBusString *dirname)
	Get the directory name from a complete filename.
dbus_bool_t	_dbus_unix_user_is_process_owner (dbus_uid_t uid)
	Checks to see if the UNIX user ID matches the UID of the process.
dbus_bool_t	_dbus_windows_user_is_process_owner (const char *windows_sid)
	Checks to see if the Windows user SID matches the owner of the process.
dbus_bool_t	_dbus_unix_user_is_at_console (dbus_uid_t uid, DBusError *error)
	Checks to see if the UNIX user ID is at the console.
dbus_bool_t	_dbus_parse_unix_group_from_config (const DBusString *groupname, dbus_gid_t *gid_p)
	Parse a UNIX group from the bus config file.
dbus_bool_t	_dbus_parse_unix_user_from_config (const DBusString *username, dbus_uid_t *uid_p)
	Parse a UNIX user from the bus config file.
dbus_bool_t	_dbus_unix_groups_from_uid (dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids, DBusError *error)
	Gets all groups corresponding to the given UNIX user ID.
dbus_bool_t	_dbus_string_parse_int (const DBusString *str, int start, long *value_return, int *end_return)
	Parses an integer contained in a DBusString.
dbus_bool_t	_dbus_string_parse_uint (const DBusString *str, int start, unsigned long *value_return, int *end_return)
	Parses an unsigned integer contained in a DBusString.
dbus_bool_t	_dbus_string_parse_int64 (const DBusString *str, int start, dbus_int64_t *value_return, int *end_return)
	Parses a dbus_int64_t integer contained in a DBusString.

Detailed Description

DBusString data structure for safer string handling.

Types and functions related to DBusString. DBusString is intended to be a string class that makes it hard to mess up security issues (and just in general harder to write buggy code). It should be used (or extended and then used) rather than the libc stuff in string.h. The string class is a bit inconvenient at spots because it handles out-of-memory failures and tries to be extra-robust.

A DBusString has a maximum length set at initialization time; this can be used to ensure that a buffer doesn't get too big. The _dbus_string_lengthen() method checks for overflow, and for max length being exceeded.

Try to avoid conversion to a plain C string, i.e. add methods on the string object instead, only convert to C string when passing things out to the public API. In particular, no sprintf, strcpy, strcat, any of that should be used. The GString feature of accepting negative numbers for "length of string" is also absent, because it could keep us from detecting bogus huge lengths. i.e. if we passed in some bogus huge length it would be taken to mean "current length of string" instead of "broken crack"

Macro Definition Documentation

DBUS_STRING_COPY_PREAMBLE

#define DBUS_STRING_COPY_PREAMBLE	(		source,
			start,
			dest,
			insert_at
	)

Value:

  DBusRealString *real_source = (DBusRealString*) source;               \
  DBusRealString *real_dest = (DBusRealString*) dest;                   \
  _dbus_assert ((source) != (dest));                                    \
  DBUS_GENERIC_STRING_PREAMBLE (real_source);                           \
  DBUS_GENERIC_STRING_PREAMBLE (real_dest);                             \
  _dbus_assert (!real_dest->constant);                                  \
  _dbus_assert (!real_dest->locked);                                    \
  _dbus_assert ((start) >= 0);                                          \
  _dbus_assert ((start) <= real_source->len);                           \
  _dbus_assert ((insert_at) >= 0);                                      \
  _dbus_assert ((insert_at) <= real_dest->len)

Checks assertions for two strings we're copying a segment between, and declares real_source/real_dest variables.

Parameters

source	the source string
start	the starting offset
dest	the dest string
insert_at	where the copied segment is inserted

Definition at line 1297 of file dbus-string.c.

UNICODE_VALID

#define UNICODE_VALID

(

Char

)

Value:

    ((Char) < 0x110000 &&                     \
     (((Char) & 0xFFFFF800) != 0xD800))

Check whether a Unicode (5.2) char is in a valid range.

The first check comes from the Unicode guarantee to never encode a point above 0x0010ffff, since UTF-16 couldn't represent it.

The second check covers surrogate pairs (category Cs).

Parameters

Char	the character

Definition at line 1647 of file dbus-string.c.

UTF8_COMPUTE

#define UTF8_COMPUTE	(		Char,
			Mask,
			Len
	)

computes length and mask of a unicode character

Parameters

Char	the char
Mask	the mask variable to assign to
Len	the length variable to assign to

Definition at line 1567 of file dbus-string.c.

UTF8_GET

#define UTF8_GET	(		Result,
			Chars,
			Count,
			Mask,
			Len
	)

Value:

  (Result) = (Chars)[0] & (Mask);                                             \
  for ((Count) = 1; (Count) < (Len); ++(Count))                               \
    {                                                                         \
      if (((Chars)[(Count)] & 0xc0) != 0x80)                                  \
        {                                                                     \
          (Result) = -1;                                                      \
          break;                                                              \
        }                                                                     \
      (Result) <<= 6;                                                         \
      (Result) |= ((Chars)[(Count)] & 0x3f);                                  \
    }

Gets a UTF-8 value.

Parameters

Result	variable for extracted unicode char.
Chars	the bytes to decode
Count	counter variable
Mask	mask for this char
Len	length for this char in bytes

Definition at line 1624 of file dbus-string.c.

UTF8_LENGTH

#define UTF8_LENGTH

(

Char

)

Value:

  ((Char) < 0x80 ? 1 :                 \
   ((Char) < 0x800 ? 2 :               \
    ((Char) < 0x10000 ? 3 :            \
     ((Char) < 0x200000 ? 4 :          \
      ((Char) < 0x4000000 ? 5 : 6)))))

computes length of a unicode character in UTF-8

Parameters

Char

the char

Definition at line 1608 of file dbus-string.c.

Function Documentation

_dbus_parse_unix_group_from_config()

dbus_bool_t _dbus_parse_unix_group_from_config	(	const DBusString *	groupname,
		dbus_gid_t *	gid_p
	)

Parse a UNIX group from the bus config file.

On Windows, this should simply always fail (just return FALSE).

Parameters

groupname	the groupname text
gid_p	place to return the gid

Returns

TRUE on success

Definition at line 687 of file dbus-sysdeps-util-win.c.

References FALSE.

_dbus_parse_unix_user_from_config()

dbus_bool_t _dbus_parse_unix_user_from_config	(	const DBusString *	username,
		dbus_uid_t *	uid_p
	)

Parse a UNIX user from the bus config file.

On Windows, this should simply always fail (just return FALSE).

Parameters

username	the username text
uid_p	place to return the uid

Returns

TRUE on success

Definition at line 702 of file dbus-sysdeps-util-win.c.

References FALSE.

_dbus_string_align_length()

dbus_bool_t _dbus_string_align_length	(	DBusString *	str,
		int	alignment
	)

Align the length of a string to a specific alignment (typically 4 or 8) by appending nul bytes to the string.

Parameters

str	a string
alignment	the alignment

Returns

FALSE if no memory

Definition at line 928 of file dbus-string.c.

_dbus_string_alloc_space()

dbus_bool_t _dbus_string_alloc_space	(	DBusString *	str,
		int	extra_bytes
	)

Preallocate extra_bytes such that a future lengthening of the string by extra_bytes is guaranteed to succeed without an out of memory error.

Parameters

str	a string
extra_bytes	bytes to alloc

Returns

FALSE if no memory

Definition at line 944 of file dbus-string.c.

References _dbus_string_lengthen(), _dbus_string_shorten(), FALSE, and TRUE.

Referenced by _dbus_type_writer_write_basic().

_dbus_string_append()

dbus_bool_t _dbus_string_append	(	DBusString *	str,
		const char *	buffer
	)

Appends a nul-terminated C-style string to a DBusString.

Parameters

str	the DBusString
buffer	the nul-terminated characters to append

Returns

FALSE if not enough memory.

Definition at line 980 of file dbus-string.c.

References _dbus_assert, _DBUS_STRING_MAX_LENGTH, DBUS_STRING_PREAMBLE, FALSE, and NULL.

Referenced by _dbus_append_address_from_socket(), _dbus_append_keyring_directory_for_credentials(), _dbus_append_user_from_current_process(), _dbus_auth_dump_supported_mechanisms(), _dbus_directory_get_next_file(), _dbus_directory_open(), _dbus_get_session_config_file(), _dbus_get_standard_session_servicedirs(), _dbus_get_system_config_file(), _dbus_hash_table_from_array(), _dbus_homedir_from_uid(), _dbus_is_console_user(), _dbus_keyring_new_for_credentials(), _dbus_listen_tcp_socket(), _dbus_server_listen_platform_specific(), _dbus_server_listen_unix_socket(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_launchd(), _dbus_server_new_for_tcp_socket(), _dbus_set_up_transient_session_servicedirs(), _dbus_string_append_strings(), _dbus_string_get_dirname(), _dbus_string_init_from_string(), _dbus_string_save_to_file(), _dbus_transport_new_for_domain_socket(), and _dbus_transport_new_for_tcp_socket().

_dbus_string_append_byte()

dbus_bool_t _dbus_string_append_byte	(	DBusString *	str,
		unsigned char	byte
	)

Appends a single byte to the string, returning FALSE if not enough memory.

Parameters

str	the string
byte	the byte to append

Returns

TRUE on success

Definition at line 1190 of file dbus-string.c.

References DBUS_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_address_append_escaped(), _dbus_concat_dir_and_file(), _dbus_string_append_byte_as_hex(), _dbus_string_append_strings(), _dbus_string_hex_decode(), and _dbus_write_uuid_file().

_dbus_string_append_byte_as_hex()

dbus_bool_t _dbus_string_append_byte_as_hex	(	DBusString *	str,
		unsigned char	byte
	)

Appends a two-character hex digit to a string, where the hex digit has the value of the given byte.

Parameters

str	the string
byte	the byte

Returns

FALSE if no memory

Definition at line 2313 of file dbus-string.c.

References _dbus_string_append_byte(), _dbus_string_set_length(), FALSE, and TRUE.

Referenced by _dbus_address_append_escaped(), and _dbus_string_hex_encode().

_dbus_string_append_len()

dbus_bool_t _dbus_string_append_len	(	DBusString *	str,
		const char *	buffer,
		int	len
	)

Appends block of bytes with the given length to a DBusString.

Parameters

str	the DBusString
buffer	the bytes to append
len	the number of bytes to append

Returns

FALSE if not enough memory.

Definition at line 1170 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, and NULL.

Referenced by _dbus_sha_final(), dbus_message_demarshal(), dbus_message_iter_get_signature(), and dbus_signature_iter_get_signature().

_dbus_string_append_printf()

dbus_bool_t _dbus_string_append_printf	(	DBusString *	str,
		const char *	format,
			...
	)

Appends a printf-style formatted string to the DBusString.

Parameters

str	the string
format	printf format

Returns

FALSE if no memory

Definition at line 1147 of file dbus-string.c.

References _dbus_string_append_printf_valist().

Referenced by _dbus_append_address_from_socket(), _dbus_append_user_from_current_process(), _dbus_command_for_pid(), _dbus_credentials_to_string_append(), _dbus_get_autolaunch_address(), _dbus_hash_table_to_array(), _dbus_logv(), _dbus_resolve_pid_fd(), _dbus_set_up_transient_session_servicedirs(), _dbus_write_pid_to_file_and_pipe(), and dbus_connection_dispatch().

_dbus_string_append_printf_valist()

dbus_bool_t _dbus_string_append_printf_valist	(	DBusString *	str,
		const char *	format,
		va_list	args
	)

Appends a printf-style formatted string to the DBusString.

Parameters

str	the string
format	printf format
args	variable argument list

Returns

FALSE if no memory

Definition at line 1105 of file dbus-string.c.

References _dbus_printf_string_upper_bound(), _dbus_string_lengthen(), DBUS_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_logv(), _dbus_string_append_printf(), and dbus_message_new_error_printf().

_dbus_string_append_strings()

dbus_bool_t _dbus_string_append_strings	(	DBusString *	str,
		char **	strings,
		char	separator
	)

Append vector with strings connected by separator.

Parameters

str	the string
strings	vector with char* pointer for merging
separator	separator to merge the vector

Returns

FALSE if not enough memory

TRUE success or empty string vector

Definition at line 1213 of file dbus-string.c.

References _dbus_string_append(), _dbus_string_append_byte(), FALSE, NULL, and TRUE.

_dbus_string_chop_white()

void _dbus_string_chop_white

(

DBusString *

str

)

Deletes leading and trailing whitespace.

Parameters

str	the string

Definition at line 2051 of file dbus-string.c.

References _dbus_string_delete(), _dbus_string_set_length(), _dbus_string_skip_white(), and _dbus_string_skip_white_reverse().

Referenced by _dbus_split_paths_and_append().

_dbus_string_compact()

dbus_bool_t _dbus_string_compact	(	DBusString *	str,
		int	max_waste
	)

Compacts the string to avoid wasted memory.

Wasted memory is memory that is allocated but not actually required to store the current length of the string. The compact is only done if more than the given amount of memory is being wasted (otherwise the waste is ignored and the call does nothing).

Parameters

str	the string
max_waste	the maximum amount of waste to ignore

Returns

FALSE if the compact failed due to realloc failure

Definition at line 420 of file dbus-string.c.

References DBUS_STRING_PREAMBLE.

_dbus_string_copy()

dbus_bool_t _dbus_string_copy	(	const DBusString *	source,
		int	start,
		DBusString *	dest,
		int	insert_at
	)

Like _dbus_string_move(), but does not delete the section of the source string that's copied to the dest string.

Parameters

source	the source string
start	where to start copying the source string
dest	the destination string
insert_at	where to place the copied part of source string

Returns

FALSE if not enough memory

Definition at line 1345 of file dbus-string.c.

References DBUS_STRING_COPY_PREAMBLE.

Referenced by _dbus_append_keyring_directory_for_credentials(), _dbus_auth_decode_data(), _dbus_auth_encode_data(), _dbus_auth_server_new(), _dbus_command_for_pid(), _dbus_concat_dir_and_file(), _dbus_header_copy(), _dbus_keyring_new_for_credentials(), _dbus_string_save_to_file(), dbus_message_copy(), and dbus_message_marshal().

_dbus_string_copy_data()

dbus_bool_t _dbus_string_copy_data	(	const DBusString *	str,
		char **	data_return
	)

Copies the data from the string into a char*.

Parameters

str	the string
data_return	place to return the data

Returns

TRUE on success, FALSE on no memory

Definition at line 717 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, dbus_malloc(), FALSE, DBusRealString::len, NULL, DBusRealString::str, and TRUE.

Referenced by _dbus_split_paths_and_append(), _dbus_transport_init_base(), and dbus_server_get_id().

_dbus_string_copy_len()

dbus_bool_t _dbus_string_copy_len	(	const DBusString *	source,
		int	start,
		int	len,
		DBusString *	dest,
		int	insert_at
	)

Like _dbus_string_copy(), but can copy a segment from the middle of the source string.

Parameters

source	the source string
start	where to start copying the source string
len	length of segment to copy
dest	the destination string
insert_at	where to place the copied segment of source string

Returns

FALSE if not enough memory

Definition at line 1437 of file dbus-string.c.

References _dbus_assert, and DBUS_STRING_COPY_PREAMBLE.

Referenced by _dbus_header_load(), _dbus_split_paths_and_append(), _dbus_string_get_dirname(), _dbus_variant_read(), and dbus_parse_address().

_dbus_string_copy_to_buffer()

void _dbus_string_copy_to_buffer	(	const DBusString *	str,
		char *	buffer,
		int	avail_len
	)

Copies the contents of a DBusString into a different buffer.

It is a bug if avail_len is too short to hold the string contents. nul termination is not copied, just the supplied bytes.

Parameters

str	a string
buffer	a C buffer to copy data to
avail_len	maximum length of C buffer

Definition at line 742 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, DBusRealString::len, and DBusRealString::str.

Referenced by _dbus_generate_random_bytes_buffer().

_dbus_string_copy_to_buffer_with_nul()

void _dbus_string_copy_to_buffer_with_nul	(	const DBusString *	str,
		char *	buffer,
		int	avail_len
	)

Copies the contents of a DBusString into a different buffer.

It is a bug if avail_len is too short to hold the string contents plus a nul byte.

Parameters

str	a string
buffer	a C buffer to copy data to
avail_len	maximum length of C buffer

Definition at line 764 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, DBusRealString::len, and DBusRealString::str.

_dbus_string_delete()

void _dbus_string_delete	(	DBusString *	str,
		int	start,
		int	len
	)

Deletes a segment of a DBusString with length len starting at start.

(Hint: to clear an entire string, setting length to 0 with _dbus_string_set_length() is easier.)

Parameters

str	the DBusString
start	where to start deleting
len	the number of bytes to delete

Definition at line 1255 of file dbus-string.c.

References _dbus_assert, and DBUS_STRING_PREAMBLE.

Referenced by _dbus_auth_bytes_sent(), _dbus_header_create(), and _dbus_string_chop_white().

_dbus_string_ends_with_c_str()

dbus_bool_t _dbus_string_ends_with_c_str	(	const DBusString *	a,
		const char *	c_str
	)

Returns whether a string ends with the given suffix.

Parameters

a	the string
c_str	the C-style string

Returns

TRUE if the string ends with the suffix

Definition at line 54 of file dbus-string-util.c.

References _dbus_assert, DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, NULL, DBusRealString::str, and TRUE.

Referenced by _dbus_directory_open().

_dbus_string_equal()

dbus_bool_t _dbus_string_equal	(	const DBusString *	a,
		const DBusString *	b
	)

Tests two DBusString for equality.

Parameters

a	first string
b	second string

Returns

TRUE if equal

Definition at line 2075 of file dbus-string.c.

References DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by dbus_error_has_name().

_dbus_string_equal_c_str()

dbus_bool_t _dbus_string_equal_c_str	(	const DBusString *	a,
		const char *	c_str
	)

Checks whether a string is equal to a C string.

Parameters

a	the string
c_str	the C string

Returns

TRUE if equal

Definition at line 2214 of file dbus-string.c.

References _dbus_assert, DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, NULL, DBusRealString::str, and TRUE.

Referenced by dbus_address_entry_get_value().

_dbus_string_equal_len()

dbus_bool_t _dbus_string_equal_len	(	const DBusString *	a,
		const DBusString *	b,
		int	len
	)

Tests two DBusString for equality up to the given length.

The strings may be shorter than the given length.

Parameters

a	first string
b	second string
len	the maximum length to look at

Returns

TRUE if equal for the given number of bytes

Definition at line 2118 of file dbus-string.c.

References DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

_dbus_string_equal_substring()

dbus_bool_t _dbus_string_equal_substring	(	const DBusString *	a,
		int	a_start,
		int	a_len,
		const DBusString *	b,
		int	b_start
	)

Tests two sub-parts of two DBusString for equality.

The specified range of the first string must exist; the specified start position of the second string must exist.

Parameters

a	first string
a_start	where to start substring in first string
a_len	length of substring in first string
b	second string
b_start	where to start substring in second string

Returns

TRUE if the two substrings are equal

Definition at line 2166 of file dbus-string.c.

References _dbus_assert, DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

_dbus_string_find()

dbus_bool_t _dbus_string_find	(	const DBusString *	str,
		int	start,
		const char *	substr,
		int *	found
	)

Finds the given substring in the string, returning TRUE and filling in the byte index where the substring was found, if it was found.

Returns FALSE if the substring wasn't found. Sets *start to the length of the string if the substring is not found.

Parameters

str	the string
start	where to start looking
substr	the substring
found	return location for where it was found, or NULL

Returns

TRUE if found

Definition at line 1666 of file dbus-string.c.

References _dbus_string_find_to().

Referenced by _dbus_keyring_validate_context(), _dbus_resolve_pid_fd(), _dbus_split_paths_and_append(), _dbus_string_split_on_byte(), and dbus_parse_address().

_dbus_string_find_blank()

dbus_bool_t _dbus_string_find_blank	(	const DBusString *	str,
		int	start,
		int *	found
	)

Finds a blank (space or tab) in the string.

Returns TRUE if found, FALSE otherwise. If a blank is not found sets *found to the length of the string.

Parameters

str	the string
start	byte index to start looking
found	place to store the location of the first blank

Returns

TRUE if a blank was found

Definition at line 1827 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_keyring_validate_context().

_dbus_string_find_byte_backward()

dbus_bool_t _dbus_string_find_byte_backward	(	const DBusString *	str,
		int	start,
		unsigned char	byte,
		int *	found
	)

Find the given byte scanning backward from the given start.

Sets *found to -1 if the byte is not found.

Parameters

str	the string
start	the place to start scanning (will not find the byte at this point)
byte	the byte to find
found	return location for where it was found

Returns

TRUE if found

Definition at line 98 of file dbus-string-util.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, and NULL.

Referenced by _dbus_string_get_dirname().

_dbus_string_find_eol()

dbus_bool_t _dbus_string_find_eol	(	const DBusString *	str,
		int	start,
		int *	found,
		int *	found_len
	)

Finds end of line ("\r\n" or "\n") in the string, returning TRUE and filling in the byte index where the eol string was found, if it was found.

Returns FALSE if eol wasn't found.

Parameters

str	the string
start	where to start looking
found	return location for where eol was found or string length otherwise
found_len	return length of found eol string or zero otherwise

Returns

TRUE if found

Definition at line 1689 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_string_pop_line().

_dbus_string_find_to()

dbus_bool_t _dbus_string_find_to	(	const DBusString *	str,
		int	start,
		int	end,
		const char *	substr,
		int *	found
	)

Finds the given substring in the string, up to a certain position, returning TRUE and filling in the byte index where the substring was found, if it was found.

Returns FALSE if the substring wasn't found. Sets *start to the length of the string if the substring is not found.

Parameters

str	the string
start	where to start looking
end	where to stop looking
substr	the substring
found	return location for where it was found, or NULL

Returns

TRUE if found

Definition at line 1759 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, NULL, DBusRealString::str, and TRUE.

Referenced by _dbus_string_find(), and dbus_parse_address().

_dbus_string_free()

void _dbus_string_free

(

DBusString *

str

)

Frees a string created by _dbus_string_init(), and fills it with the same contents as _DBUS_STRING_INIT_INVALID.

Unlike all other DBusString API, it is also valid to call this function for a string that was filled with _DBUS_STRING_INIT_INVALID. This is convenient for error rollback.

Parameters

str	memory where the string is stored.

Definition at line 278 of file dbus-string.c.

References DBusRealString::align_offset, DBusRealString::allocated, DBusRealString::constant, dbus_free(), DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::locked, NULL, DBusRealString::str, and DBusRealString::valid.

Referenced by _dbus_append_keyring_directory_for_credentials(), _dbus_auth_client_new(), _dbus_auth_server_new(), _dbus_auth_unref(), _dbus_command_for_pid(), _dbus_directory_open(), _dbus_generate_random_bytes_buffer(), _dbus_get_autolaunch_address(), _dbus_get_standard_session_servicedirs(), _dbus_hash_table_from_array(), _dbus_hash_table_to_array(), _dbus_header_copy(), _dbus_header_free(), _dbus_is_console_user(), _dbus_keyring_new_for_credentials(), _dbus_keyring_unref(), _dbus_logv(), _dbus_message_loader_unref(), _dbus_read_credentials_socket(), _dbus_replace_install_prefix(), _dbus_resolve_pid_fd(), _dbus_server_finalize_base(), _dbus_server_init_base(), _dbus_server_listen_platform_specific(), _dbus_server_listen_unix_socket(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_launchd(), _dbus_server_new_for_tcp_socket(), _dbus_set_up_transient_session_servicedirs(), _dbus_sha_compute(), _dbus_split_paths_and_append(), _dbus_string_hex_decode(), _dbus_string_hex_encode(), _dbus_string_init_from_string(), _dbus_string_save_to_file(), _dbus_transport_new_for_domain_socket(), _dbus_transport_new_for_socket(), _dbus_transport_new_for_tcp_socket(), _dbus_transport_open_platform_specific(), _dbus_variant_read(), _dbus_write_pid_to_file_and_pipe(), _dbus_write_uuid_file(), dbus_address_escape_value(), dbus_address_unescape_value(), dbus_connection_dispatch(), dbus_message_copy(), dbus_message_demarshal_bytes_needed(), dbus_message_iter_get_signature(), dbus_message_marshal(), dbus_message_new_error_printf(), dbus_parse_address(), dbus_signature_iter_get_signature(), and dbus_try_get_local_machine_id().

_dbus_string_get_allocated_size()

int _dbus_string_get_allocated_size

(

const DBusString *

str

)

Returns the allocated size of the string.

Parameters

str	the string

Returns

the allocated size

Definition at line 476 of file dbus-string.c.

References DBusRealString::allocated, and DBUS_CONST_STRING_PREAMBLE.

_dbus_string_get_data_len()

char * _dbus_string_get_data_len	(	DBusString *	str,
		int	start,
		int	len
	)

Gets a sub-portion of the raw character buffer from the string.

The "len" field is required simply for error checking, to be sure you don't try to use more string than exists. The nul termination of the returned buffer remains at the end of the entire string, not at start + len.

Parameters

str	the string
start	byte offset to return
len	length of segment to return

Returns

the string data

Definition at line 535 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, and DBusRealString::str.

Referenced by _dbus_generate_random_bytes(), _dbus_read(), _dbus_read_socket(), and _dbus_read_socket_with_unix_fds().

_dbus_string_get_dirname()

dbus_bool_t _dbus_string_get_dirname	(	const DBusString *	filename,
		DBusString *	dirname
	)

Get the directory name from a complete filename.

Parameters

filename	the filename
dirname	string to append directory name to

Returns

FALSE if no memory

Definition at line 1018 of file dbus-sysdeps-util-unix.c.

References _dbus_assert, _dbus_string_append(), _dbus_string_copy_len(), _dbus_string_find_byte_backward(), and NULL.

_dbus_string_hex_decode()

dbus_bool_t _dbus_string_hex_decode	(	const DBusString *	source,
		int	start,
		int *	end_return,
		DBusString *	dest,
		int	insert_at
	)

Decodes a string from hex encoding.

Parameters

source	the string to decode
start	byte index to start decode
end_return	return location of the end of the hex data, or NULL
dest	string where decoded data should be placed
insert_at	where to place decoded data

Returns

TRUE if decoding was successful, FALSE if no memory.

Definition at line 2432 of file dbus-string.c.

References _dbus_assert, _dbus_string_append_byte(), _dbus_string_free(), _dbus_string_init(), _dbus_string_move(), FALSE, and TRUE.

_dbus_string_hex_encode()

dbus_bool_t _dbus_string_hex_encode	(	const DBusString *	source,
		int	start,
		DBusString *	dest,
		int	insert_at
	)

Encodes a string in hex, the way MD5 and SHA-1 are usually encoded.

(Each byte is two hex digits.)

Parameters

source	the string to encode
start	byte index to start encoding
dest	string where encoded data should be placed
insert_at	where to place encoded data

Returns

TRUE if encoding was successful, FALSE if no memory etc.

Definition at line 2382 of file dbus-string.c.

References _dbus_assert, _dbus_string_append_byte_as_hex(), _dbus_string_free(), _dbus_string_init(), _dbus_string_move(), FALSE, and TRUE.

Referenced by _dbus_keyring_get_hex_key(), _dbus_sha_compute(), and _dbus_uuid_encode().

_dbus_string_init()

dbus_bool_t _dbus_string_init

(

DBusString *

str

)

Initializes a string.

The string starts life with zero length. The string must eventually be freed with _dbus_string_free().

Parameters

str	memory to hold the string

Returns

TRUE on success, FALSE if no memory

Definition at line 182 of file dbus-string.c.

References _dbus_string_init_preallocated().

Referenced by _dbus_append_keyring_directory_for_credentials(), _dbus_auth_client_new(), _dbus_auth_server_new(), _dbus_command_for_pid(), _dbus_generate_random_bytes_buffer(), _dbus_get_autolaunch_address(), _dbus_get_standard_session_servicedirs(), _dbus_hash_table_from_array(), _dbus_hash_table_to_array(), _dbus_is_console_user(), _dbus_keyring_new_for_credentials(), _dbus_logv(), _dbus_message_loader_new(), _dbus_read_credentials_socket(), _dbus_replace_install_prefix(), _dbus_resolve_pid_fd(), _dbus_server_init_base(), _dbus_server_listen_platform_specific(), _dbus_server_listen_unix_socket(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_launchd(), _dbus_server_new_for_tcp_socket(), _dbus_set_up_transient_session_servicedirs(), _dbus_sha_compute(), _dbus_split_paths_and_append(), _dbus_string_hex_decode(), _dbus_string_hex_encode(), _dbus_string_init_from_string(), _dbus_string_save_to_file(), _dbus_string_steal_data(), _dbus_transport_new_for_domain_socket(), _dbus_transport_new_for_socket(), _dbus_transport_new_for_tcp_socket(), _dbus_transport_open_platform_specific(), _dbus_variant_read(), _dbus_write_pid_to_file_and_pipe(), _dbus_write_uuid_file(), dbus_address_escape_value(), dbus_address_unescape_value(), dbus_connection_dispatch(), dbus_message_iter_get_signature(), dbus_message_marshal(), dbus_message_new_error_printf(), dbus_parse_address(), dbus_signature_iter_get_signature(), and dbus_try_get_local_machine_id().

_dbus_string_init_const()

void _dbus_string_init_const	(	DBusString *	str,
		const char *	value
	)

Initializes a constant string.

The value parameter is not copied (should be static), and the string may never be modified. It is safe but not necessary to call _dbus_string_free() on a const string. The string has a length limit of MAXINT - 8.

Parameters

str	memory to use for the string
value	a string to be stored in str (not copied!!!)

Definition at line 197 of file dbus-string.c.

References _dbus_assert, _dbus_string_init_const_len(), and NULL.

Referenced by _dbus_append_address_from_socket(), _dbus_append_keyring_directory_for_credentials(), _dbus_change_to_daemon_user(), _dbus_get_local_system_servicedirs(), _dbus_get_standard_session_servicedirs(), _dbus_get_standard_system_servicedirs(), _dbus_get_uuid(), _dbus_read_local_machine_uuid(), _dbus_server_listen_unix_socket(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_tcp_socket(), _dbus_split_paths_and_append(), _dbus_transport_new_for_domain_socket(), _dbus_variant_read(), _dbus_variant_write(), _dbus_verify_daemon_user(), dbus_address_escape_value(), dbus_address_unescape_value(), dbus_error_has_name(), dbus_message_iter_append_basic(), dbus_message_iter_open_container(), dbus_parse_address(), dbus_signature_validate(), dbus_validate_bus_name(), dbus_validate_error_name(), dbus_validate_interface(), dbus_validate_member(), dbus_validate_path(), and dbus_validate_utf8().

_dbus_string_init_const_len()

void _dbus_string_init_const_len	(	DBusString *	str,
		const char *	value,
		int	len
	)

Initializes a constant string with a length.

The value parameter is not copied (should be static), and the string may never be modified. It is safe but not necessary to call _dbus_string_free() on a const string.

Parameters

str	memory to use for the string
value	a string to be stored in str (not copied!!!)
len	the length to use

Definition at line 217 of file dbus-string.c.

References _dbus_assert, _DBUS_STRING_MAX_LENGTH, DBusRealString::align_offset, DBusRealString::allocated, DBusRealString::constant, DBusRealString::len, DBusRealString::locked, NULL, DBusRealString::str, TRUE, and DBusRealString::valid.

Referenced by _dbus_send_credentials_socket(), _dbus_string_init_const(), _dbus_uuid_encode(), and dbus_message_demarshal_bytes_needed().

_dbus_string_init_from_string()

dbus_bool_t _dbus_string_init_from_string	(	DBusString *	str,
		const DBusString *	from
	)

Initializes a string from another string.

The string must be freed with _dbus_string_free() in case of success. In case of error the string is freed by this function itself.

Parameters

str	memory to hold the string
from	instance from which the string is initialized

Returns

TRUE on success, FALSE if no memory

Definition at line 254 of file dbus-string.c.

References _dbus_string_append(), _dbus_string_free(), _dbus_string_init(), FALSE, and TRUE.

Referenced by _dbus_directory_open().

_dbus_string_init_preallocated()

dbus_bool_t _dbus_string_init_preallocated	(	DBusString *	str,
		int	allocate_size
	)

Initializes a string that can be up to the given allocation size before it has to realloc.

The string starts life with zero length. The string must eventually be freed with _dbus_string_free().

Parameters

str	memory to hold the string
allocate_size	amount to preallocate

Returns

TRUE on success, FALSE if no memory

Definition at line 139 of file dbus-string.c.

References _dbus_assert, DBusRealString::align_offset, DBusRealString::allocated, DBusRealString::constant, dbus_malloc(), FALSE, DBusRealString::len, DBusRealString::locked, NULL, DBusRealString::str, TRUE, and DBusRealString::valid.

Referenced by _dbus_header_copy(), _dbus_header_init(), _dbus_string_init(), and dbus_message_copy().

_dbus_string_insert_2_aligned()

dbus_bool_t _dbus_string_insert_2_aligned	(	DBusString *	str,
		int	insert_at,
		const unsigned char	octets[2]
	)

Inserts 2 bytes aligned on a 2 byte boundary with any alignment padding initialized to 0.

Parameters

str	the DBusString
insert_at	where to insert
octets	2 bytes to insert

Returns

FALSE if not enough memory.

Definition at line 1005 of file dbus-string.c.

References DBUS_STRING_PREAMBLE, FALSE, DBusRealString::str, and TRUE.

_dbus_string_insert_4_aligned()

dbus_bool_t _dbus_string_insert_4_aligned	(	DBusString *	str,
		int	insert_at,
		const unsigned char	octets[4]
	)

Inserts 4 bytes aligned on a 4 byte boundary with any alignment padding initialized to 0.

Parameters

str	the DBusString
insert_at	where to insert
octets	4 bytes to insert

Returns

FALSE if not enough memory.

Definition at line 1029 of file dbus-string.c.

References DBUS_STRING_PREAMBLE, FALSE, DBusRealString::str, and TRUE.

_dbus_string_insert_8_aligned()

dbus_bool_t _dbus_string_insert_8_aligned	(	DBusString *	str,
		int	insert_at,
		const unsigned char	octets[8]
	)

Inserts 8 bytes aligned on an 8 byte boundary with any alignment padding initialized to 0.

Parameters

str	the DBusString
insert_at	where to insert
octets	8 bytes to insert

Returns

FALSE if not enough memory.

Definition at line 1053 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, FALSE, DBusRealString::str, and TRUE.

_dbus_string_insert_alignment()

dbus_bool_t _dbus_string_insert_alignment	(	DBusString *	str,
		int *	insert_at,
		int	alignment
	)

Inserts padding at *insert_at such to align it to the given boundary.

Initializes the padding to nul bytes. Sets *insert_at to the aligned position.

Parameters

str	the DBusString
insert_at	location to be aligned
alignment	alignment boundary (1, 2, 4, or 8)

Returns

FALSE if not enough memory.

Definition at line 1081 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, FALSE, and TRUE.

_dbus_string_insert_byte()

dbus_bool_t _dbus_string_insert_byte	(	DBusString *	str,
		int	i,
		unsigned char	byte
	)

Inserts a single byte at the given position.

Parameters

str	the string
i	the position
byte	the value to insert

Returns

TRUE on success

Definition at line 659 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, FALSE, DBusRealString::str, and TRUE.

Referenced by _dbus_marshal_write_basic().

_dbus_string_insert_bytes()

dbus_bool_t _dbus_string_insert_bytes	(	DBusString *	str,
		int	i,
		int	n_bytes,
		unsigned char	byte
	)

Inserts a number of bytes of a given value at the given position.

Parameters

str	the string
i	the position
n_bytes	number of bytes
byte	the value to insert

Returns

TRUE on success

Definition at line 629 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, FALSE, DBusRealString::str, and TRUE.

_dbus_string_lengthen()

dbus_bool_t _dbus_string_lengthen	(	DBusString *	str,
		int	additional_length
	)

Makes a string longer by the given number of bytes.

Checks whether adding additional_length to the current length would overflow an integer, and checks for exceeding a string's max length. The new bytes are not initialized, other than nul-terminating the end of the string. The uninitialized bytes may contain nul bytes or other junk.

Parameters

str	a string
additional_length	length to add to the string.

Returns

TRUE on success.

Definition at line 805 of file dbus-string.c.

References _dbus_assert, _DBUS_STRING_MAX_LENGTH, DBUS_STRING_PREAMBLE, FALSE, and DBusRealString::len.

Referenced by _dbus_generate_random_bytes(), _dbus_read(), _dbus_read_socket(), _dbus_read_socket_with_unix_fds(), _dbus_string_alloc_space(), and _dbus_string_append_printf_valist().

_dbus_string_move()

dbus_bool_t _dbus_string_move	(	DBusString *	source,
		int	start,
		DBusString *	dest,
		int	insert_at
	)

Moves the end of one string into another string.

Both strings must be initialized, valid strings.

Parameters

source	the source string
start	where to chop off the source string
dest	the destination string
insert_at	where to move the chopped-off part of source string

Returns

FALSE if not enough memory

Definition at line 1321 of file dbus-string.c.

References _dbus_assert, _dbus_string_move_len(), and DBusRealString::len.

Referenced by _dbus_string_hex_decode(), and _dbus_string_hex_encode().

_dbus_string_move_len()

dbus_bool_t _dbus_string_move_len	(	DBusString *	source,
		int	start,
		int	len,
		DBusString *	dest,
		int	insert_at
	)

Like _dbus_string_move(), but can move a segment from the middle of the source string.

Parameters

source	the source string
start	first byte of source string to move
len	length of segment to move
dest	the destination string
insert_at	where to move the bytes from the source string

Returns

FALSE if not enough memory

Definition at line 1370 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_COPY_PREAMBLE, FALSE, and TRUE.

Referenced by _dbus_string_move(), _dbus_string_pop_line(), and _dbus_string_split_on_byte().

_dbus_string_parse_int()

dbus_bool_t _dbus_string_parse_int	(	const DBusString *	str,
		int	start,
		long *	value_return,
		int *	end_return
	)

Parses an integer contained in a DBusString.

Either return parameter may be NULL if you aren't interested in it. The integer is parsed and stored in value_return. Return parameters are not initialized if the function returns FALSE.

Parameters

str	the string
start	the byte index of the start of the integer
value_return	return location of the integer value or NULL
end_return	return location of the end of the integer, or NULL

Returns

TRUE on success

Definition at line 371 of file dbus-sysdeps.c.

References _dbus_set_errno_to_zero(), FALSE, NULL, and TRUE.

_dbus_string_parse_int64()

dbus_bool_t _dbus_string_parse_int64	(	const DBusString *	str,
		int	start,
		dbus_int64_t *	value_return,
		int *	end_return
	)

Parses a dbus_int64_t integer contained in a DBusString.

Either return parameter may be NULL if you aren't interested in it. The integer is parsed and stored in value_return. Return parameters are not initialized if the function returns FALSE.

Parameters

str	the string
start	the byte index of the start of the integer
value_return	return location of the integer value or NULL
end_return	return location of the end of the integer, or NULL

Returns

TRUE on success

Definition at line 449 of file dbus-sysdeps.c.

References _dbus_set_errno_to_zero(), FALSE, NULL, and TRUE.

_dbus_string_parse_uint()

dbus_bool_t _dbus_string_parse_uint	(	const DBusString *	str,
		int	start,
		unsigned long *	value_return,
		int *	end_return
	)

Parses an unsigned integer contained in a DBusString.

Either return parameter may be NULL if you aren't interested in it. The integer is parsed and stored in value_return. Return parameters are not initialized if the function returns FALSE.

Parameters

str	the string
start	the byte index of the start of the integer
value_return	return location of the integer value or NULL
end_return	return location of the end of the integer, or NULL

Returns

TRUE on success

Definition at line 410 of file dbus-sysdeps.c.

References _dbus_set_errno_to_zero(), FALSE, NULL, and TRUE.

Referenced by _dbus_is_a_number(), and _dbus_resolve_pid_fd().

_dbus_string_pop_line()

dbus_bool_t _dbus_string_pop_line	(	DBusString *	source,
		DBusString *	dest
	)

Assigns a newline-terminated or \r\n-terminated line from the front of the string to the given dest string.

The dest string's previous contents are deleted. If the source string contains no newline, moves the entire source string to the dest string.

Parameters

source	the source string
dest	the destination string (contents are replaced)

Returns

FALSE if no memory, or source has length 0

Definition at line 1971 of file dbus-string.c.

References _dbus_assert, _dbus_assert_not_reached, _dbus_string_find_eol(), _dbus_string_move_len(), _dbus_string_set_length(), FALSE, and TRUE.

_dbus_string_replace_len()

dbus_bool_t _dbus_string_replace_len	(	const DBusString *	source,
		int	start,
		int	len,
		DBusString *	dest,
		int	replace_at,
		int	replace_len
	)

Replaces a segment of dest string with a segment of source string.

Parameters

source	the source string
start	where to start copying the source string
len	length of segment to copy
dest	the destination string
replace_at	start of segment of dest string to replace
replace_len	length of segment of dest string to replace

Returns

FALSE if not enough memory

Definition at line 1466 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_COPY_PREAMBLE, FALSE, and TRUE.

Referenced by _dbus_auth_set_context(), and _dbus_replace_install_prefix().

_dbus_string_set_length()

dbus_bool_t _dbus_string_set_length	(	DBusString *	str,
		int	length
	)

Sets the length of a string.

Can be used to truncate or lengthen the string. If the string is lengthened, the function may fail and return FALSE. Newly-added bytes are not initialized, as with _dbus_string_lengthen().

Parameters

str	a string
length	new length of the string.

Returns

FALSE on failure.

Definition at line 847 of file dbus-string.c.

References _dbus_assert, and DBUS_STRING_PREAMBLE.

Referenced by _dbus_address_append_escaped(), _dbus_append_keyring_directory_for_credentials(), _dbus_auth_delete_unused_bytes(), _dbus_directory_get_next_file(), _dbus_file_get_contents(), _dbus_generate_random_bytes(), _dbus_hash_table_from_array(), _dbus_header_load(), _dbus_header_reinit(), _dbus_message_loader_new(), _dbus_read(), _dbus_read_socket(), _dbus_read_socket_with_unix_fds(), _dbus_string_append_byte_as_hex(), _dbus_string_chop_white(), _dbus_string_pop_line(), and _dbus_string_split_on_byte().

_dbus_string_shorten()

void _dbus_string_shorten	(	DBusString *	str,
		int	length_to_remove
	)

Makes a string shorter by the given number of bytes.

Parameters

str	a string
length_to_remove	length to remove from the string.

Definition at line 825 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, and DBusRealString::len.

Referenced by _dbus_concat_dir_and_file(), _dbus_lookup_launchd_socket(), and _dbus_string_alloc_space().

_dbus_string_skip_blank()

void _dbus_string_skip_blank	(	const DBusString *	str,
		int	start,
		int *	end
	)

Skips blanks from start, storing the first non-blank in *end (blank is space or tab).

Parameters

str	the string
start	where to start
end	where to store the first non-blank byte index

Definition at line 1865 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, DBUS_IS_ASCII_BLANK, DBusRealString::len, and DBusRealString::str.

_dbus_string_skip_white()

void _dbus_string_skip_white	(	const DBusString *	str,
		int	start,
		int *	end
	)

Skips whitespace from start, storing the first non-whitespace in *end.

(whitespace is space, tab, newline, CR).

Parameters

str	the string
start	where to start
end	where to store the first non-whitespace byte index

Definition at line 1899 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, DBUS_IS_ASCII_WHITE, DBusRealString::len, and DBusRealString::str.

Referenced by _dbus_string_chop_white().

_dbus_string_skip_white_reverse()

void _dbus_string_skip_white_reverse	(	const DBusString *	str,
		int	end,
		int *	start
	)

Skips whitespace from end, storing the start index of the trailing whitespace in *start.

(whitespace is space, tab, newline, CR).

Parameters

str	the string
end	where to start scanning backward
start	where to store the start of whitespace chars

Definition at line 1932 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, DBUS_IS_ASCII_WHITE, and DBusRealString::str.

Referenced by _dbus_string_chop_white().

_dbus_string_split_on_byte()

dbus_bool_t _dbus_string_split_on_byte	(	DBusString *	source,
		unsigned char	byte,
		DBusString *	tail
	)

Looks for the first occurance of a byte, deletes that byte, and moves everything after the byte to the beginning of a separate string.

Both strings must be initialized, valid strings.

Parameters

source	the source string
byte	the byte to remove and split the string at
tail	the split off string

Returns

FALSE if not enough memory or if byte could not be found

Definition at line 1529 of file dbus-string.c.

References _dbus_string_find(), _dbus_string_move_len(), _dbus_string_set_length(), FALSE, and TRUE.

Referenced by _dbus_hash_table_from_array().

_dbus_string_starts_with_c_str()

dbus_bool_t _dbus_string_starts_with_c_str	(	const DBusString *	a,
		const char *	c_str
	)

Checks whether a string starts with the given C string.

Parameters

a	the string
c_str	the C string

Returns

TRUE if string starts with it

Definition at line 2250 of file dbus-string.c.

References _dbus_assert, DBUS_GENERIC_STRING_PREAMBLE, FALSE, DBusRealString::len, NULL, DBusRealString::str, and TRUE.

Referenced by _dbus_replace_install_prefix(), and _dbus_string_starts_with_words_c_str().

_dbus_string_starts_with_words_c_str()

dbus_bool_t _dbus_string_starts_with_words_c_str	(	const DBusString *	a,
		const char *	c_str,
		char	word_separator
	)

Checks whether a string starts with the given C string, after which it ends or is separated from the rest by a given separator character.

Parameters

a	the string
c_str	the C string
word_separator	the separator

Returns

TRUE if string starts with it

Definition at line 2288 of file dbus-string.c.

References _dbus_assert, _dbus_string_starts_with_c_str(), FALSE, and NULL.

_dbus_string_steal_data()

dbus_bool_t _dbus_string_steal_data	(	DBusString *	str,
		char **	data_return
	)

Like _dbus_string_get_data(), but removes the gotten data from the original string.

The caller must free the data returned. This function may fail due to lack of memory, and return FALSE.

Parameters

str	the string
data_return	location to return the buffer

Returns

TRUE on success

Definition at line 686 of file dbus-string.c.

References _dbus_assert, _dbus_string_init(), DBUS_STRING_PREAMBLE, FALSE, NULL, DBusRealString::str, and TRUE.

Referenced by _dbus_hash_table_from_array(), _dbus_hash_table_to_array(), _dbus_set_up_transient_session_servicedirs(), dbus_address_escape_value(), dbus_address_unescape_value(), dbus_message_iter_get_signature(), dbus_message_marshal(), dbus_signature_iter_get_signature(), and dbus_try_get_local_machine_id().

_dbus_string_tolower_ascii()

void _dbus_string_tolower_ascii	(	const DBusString *	str,
		int	start,
		int	len
	)

Converts the given range of the string to lower case.

Parameters

str	the string
start	first byte index to convert
len	number of bytes to convert

Definition at line 2608 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, and DBusRealString::str.

_dbus_string_toupper_ascii()

void _dbus_string_toupper_ascii	(	const DBusString *	str,
		int	start,
		int	len
	)

Converts the given range of the string to upper case.

Parameters

str	the string
start	first byte index to convert
len	number of bytes to convert

Definition at line 2639 of file dbus-string.c.

References _dbus_assert, DBUS_STRING_PREAMBLE, and DBusRealString::str.

_dbus_string_validate_ascii()

dbus_bool_t _dbus_string_validate_ascii	(	const DBusString *	str,
		int	start,
		int	len
	)

Checks that the given range of the string is valid ASCII with no nul bytes.

If the given range is not entirely contained in the string, returns FALSE.

Parameters

str	the string
start	first byte index to check
len	number of bytes to check

Returns

TRUE if the byte range exists and is all valid ASCII

Definition at line 2573 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_generate_random_ascii(), and _dbus_keyring_validate_context().

_dbus_string_validate_nul()

dbus_bool_t _dbus_string_validate_nul	(	const DBusString *	str,
		int	start,
		int	len
	)

Checks that the given range of the string is all nul bytes.

If the given range is not entirely contained in the string, returns FALSE.

Parameters

str	the string
start	first byte index to check
len	number of bytes to check

Returns

TRUE if the byte range exists and is all nul bytes

Definition at line 2776 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, and TRUE.

Referenced by _dbus_header_load().

_dbus_string_validate_utf8()

dbus_bool_t _dbus_string_validate_utf8	(	const DBusString *	str,
		int	start,
		int	len
	)

Checks that the given range of the string is valid UTF-8.

If the given range is not entirely contained in the string, returns FALSE. If the string contains any nul bytes in the given range, returns FALSE. If the start and start+len are not on character boundaries, returns FALSE.

Parameters

str	the string
start	first byte index to check
len	number of bytes to check

Returns

TRUE if the byte range exists and is all valid UTF-8

Definition at line 2678 of file dbus-string.c.

References _dbus_assert, DBUS_CONST_STRING_PREAMBLE, FALSE, DBusRealString::len, DBusRealString::str, TRUE, UNICODE_VALID, UTF8_COMPUTE, UTF8_GET, and UTF8_LENGTH.

Referenced by dbus_validate_bus_name(), dbus_validate_error_name(), dbus_validate_interface(), dbus_validate_member(), dbus_validate_path(), and dbus_validate_utf8().

_dbus_string_zero()

void _dbus_string_zero

(

DBusString *

str

)

Clears all allocated bytes in the string to zero.

Parameters

str	the string

Definition at line 2808 of file dbus-string.c.

References DBusRealString::align_offset, DBusRealString::allocated, DBUS_STRING_PREAMBLE, and DBusRealString::str.

_dbus_unix_groups_from_uid()

dbus_bool_t _dbus_unix_groups_from_uid	(	dbus_uid_t	uid,
		dbus_gid_t **	group_ids,
		int *	n_group_ids,
		DBusError *	error
	)

Gets all groups corresponding to the given UNIX user ID.

On UNIX, just calls _dbus_groups_from_uid(). On Windows, should always fail since we don't know any UNIX groups.

Parameters

uid	the UID
group_ids	return location for array of group IDs
n_group_ids	return location for length of returned array
error	error location

Returns

TRUE if the UID existed and we got some credentials

Definition at line 721 of file dbus-sysdeps-util-win.c.

References FALSE.

_dbus_unix_user_is_at_console()

dbus_bool_t _dbus_unix_user_is_at_console	(	dbus_uid_t	uid,
		DBusError *	error
	)

Checks to see if the UNIX user ID is at the console.

Should always fail on Windows (set the error to DBUS_ERROR_NOT_SUPPORTED).

Parameters

uid	UID of person to check
error	return location for errors

Returns

TRUE if the UID is the same as the console user and there are no errors

Definition at line 670 of file dbus-sysdeps-util-win.c.

References FALSE.

_dbus_unix_user_is_process_owner()

dbus_bool_t _dbus_unix_user_is_process_owner

(

dbus_uid_t

uid

)

Checks to see if the UNIX user ID matches the UID of the process.

Should always return FALSE on Windows.

Parameters

uid	the UNIX user ID

Returns

TRUE if this uid owns the process.

Definition at line 639 of file dbus-sysdeps-util-win.c.

References FALSE.

_dbus_windows_user_is_process_owner()

dbus_bool_t _dbus_windows_user_is_process_owner

(

const char *

windows_sid

)

Checks to see if the Windows user SID matches the owner of the process.

Should always return FALSE on UNIX.

Parameters

windows_sid

the Windows user SID

Returns

TRUE if this user owns the process.

Definition at line 644 of file dbus-sysdeps-util-win.c.

References TRUE.