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Update input validation. Always use the magic CHECK macro, which prints an error message including instructions on how to report this problem.

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darcs-hash:20060621004836-ac50b-a47f296634eda0c469eb39034603015b1ad7ab5c.gz
This commit is contained in:
axel 2006-06-21 10:48:36 +10:00
parent 7268a4a4e0
commit b016438c08
12 changed files with 139 additions and 224 deletions
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32
builtin.c
View File

@ -3015,12 +3015,8 @@ void builtin_destroy()
int builtin_exists( wchar_t *cmd )
{
if( !cmd )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( cmd, 0 );
/*
Count is not a builtin, but it's help is handled internally by
fish, so it is in the hash_table_t.
@ -3052,12 +3048,9 @@ int builtin_run( wchar_t **argv )
{
int (*cmd)(wchar_t **argv)=0;
if( !argv || !argv[0] )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( argv, 1 );
CHECK( argv[0], 1 );
cmd = (int (*)(wchar_t **))hash_get( &builtin, argv[0] );
if( argv[1] != 0 && !internal_help(argv[0]) )
@ -3087,24 +3080,15 @@ int builtin_run( wchar_t **argv )
void builtin_get_names( array_list_t *list )
{
if( !list )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( list, );
hash_get_keys( &builtin, list );
}
const wchar_t *builtin_get_desc( const wchar_t *b )
{
if( !b )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( b, 0 );
if( !desc )
{
int i;

33
common.c
View File

@ -495,12 +495,8 @@ int contains_str( const wchar_t *a, ... )
va_list va;
int res = 0;
if( !a )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( a, 0 );
va_start( va, a );
while( (arg=va_arg(va, wchar_t *) )!= 0 )
{
@ -546,12 +542,8 @@ void debug( int level, const wchar_t *msg, ... )
string_buffer_t sb;
string_buffer_t sb2;
if( !msg )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( msg, );
if( level > debug_level )
return;
@ -578,12 +570,9 @@ void write_screen( const wchar_t *msg, string_buffer_t *buff )
int tok_width = 0;
int screen_width = common_get_width();
if( !msg || !buff )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( msg, );
CHECK( buff, );
if( screen_width )
{
start = pos = msg;
@ -799,12 +788,8 @@ wchar_t *unescape( const wchar_t * orig, int unescape_special )
wchar_t prev=0;
wchar_t *in;
if( !orig )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( orig, 0 );
len = wcslen( orig );
in = wcsdup( orig );

20
common.h
View File

@ -67,6 +67,26 @@ extern char *profile;
*/
extern wchar_t *program_name;
/**
This macro is used to check that an input argument is not null. It
is a bit lika a non-fatal form of assert. Instead of exit-ing on
failiure, the current function is ended at once. The second
parameter is the exit status of the current function on failiure.
*/
#define CHECK( arg, retval ) \
if( !(arg) ) \
{ \
debug( 1, \
L"function %s called with null value for argument %s. " \
L"This is a bug. " \
L"If you can reproduce it, please send a bug report to %s.", \
__func__, \
#arg, \
PACKAGE_BUGREPORT ); \
return retval; \
} \
/**
Take an array_list_t containing wide strings and converts them to a
single null-terminated wchar_t **. The array is allocated using

42
complete.c
View File

@ -389,12 +389,8 @@ void complete_add( const wchar_t *cmd,
complete_entry *c;
complete_entry_opt *opt;
if( !cmd )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( cmd, );
c = complete_find_exact_entry( cmd, cmd_type );
if( c == 0 )
@ -461,12 +457,8 @@ void complete_remove( const wchar_t *cmd,
{
complete_entry *e, *eprev=0, *enext=0;
if( !cmd )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( cmd, );
for( e = first_entry; e; e=enext )
{
enext=e->next;
@ -615,12 +607,9 @@ int complete_is_valid_option( const wchar_t *str,
void *context;
if( !str || !opt )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( str, 0 );
CHECK( opt, 0 );
/*
Check some generic things like -- and - options.
*/
@ -942,12 +931,8 @@ const wchar_t *complete_get_desc( const wchar_t *filename )
{
struct stat buf;
if( !filename )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( filename, 0 );
if( !get_desc_buff )
{
get_desc_buff = sb_halloc( global_context);
@ -1978,12 +1963,9 @@ void complete( const wchar_t *cmd,
int cursor_pos = wcslen(cmd );
if( !cmd || !comp )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( cmd, );
CHECK( comp, );
/**
If we are completing a variable name or a tilde expansion user
name, we do that and return. No need for any other competions.

32
env.c
View File

@ -627,12 +627,8 @@ int env_set( const wchar_t *key,
event_t ev;
int is_universal = 0;
if( !key )
{
debug( 0, L"%s called with null input", __func__ );
return ENV_INVALID;
}
CHECK( key, ENV_INVALID );
if( (var_mode & ENV_USER ) &&
hash_get( &env_read_only, key ) )
{
@ -877,12 +873,8 @@ int env_remove( const wchar_t *key, int var_mode )
env_node_t *first_node;
int erased = 0;
if( !key )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( key, 1 );
if( (var_mode & ENV_USER ) &&
hash_get( &env_read_only, key ) )
{
@ -941,12 +933,8 @@ wchar_t *env_get( const wchar_t *key )
env_node_t *env = top;
wchar_t *item;
if( !key )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( key, 0 );
if( wcscmp( key, L"history" ) == 0 )
{
wchar_t *current;
@ -1045,12 +1033,8 @@ int env_exist( const wchar_t *key, int mode )
env_node_t *env;
wchar_t *item=0;
if( !key )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( key, 0 );
/*
Read only variables all exist, and they are all global. A local
version can not exist.

8
exec.c
View File

@ -652,12 +652,8 @@ void exec( job_t *j )
*/
int exec_error=0;
if( !j )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( j, );
if( no_exec )
return;

11
expand.c
View File

@ -101,6 +101,8 @@ int expand_is_clean( const wchar_t *in )
const wchar_t * str = in;
CHECK( in, 1 );
/*
Test characters that have a special meaning in the first character position
*/
@ -161,6 +163,8 @@ wchar_t *expand_escape_variable( const wchar_t *in )
array_list_t l;
string_buffer_t buff;
CHECK( in, 0 );
al_init( &l );
tokenize_variable_array( in, &l );
sb_init( &buff );
@ -1316,6 +1320,8 @@ static wchar_t * expand_tilde_internal( wchar_t *in )
wchar_t *expand_tilde( wchar_t *in)
{
CHECK( in, 0 );
if( in[0] == L'~' )
{
in[0] = HOME_DIRECTORY;
@ -1374,6 +1380,9 @@ int expand_string( void *context,
int res = EXPAND_OK;
int start_count = al_get_count( end_out );
CHECK( str, EXPAND_ERROR );
CHECK( end_out, EXPAND_ERROR );
if( (!(flags & ACCEPT_INCOMPLETE)) && expand_is_clean( str ) )
{
halloc_register( context, str );
@ -1619,6 +1628,8 @@ wchar_t *expand_one( void *context, wchar_t *string, int flags )
array_list_t l;
int res;
wchar_t *one;
CHECK( string, 0 );
if( (!(flags & ACCEPT_INCOMPLETE)) && expand_is_clean( string ) )
{

71
function.c
View File

@ -176,13 +176,9 @@ void function_add( const wchar_t *name,
wchar_t *cmd_end;
function_data_t *d;
CHECK( name, );
CHECK( val, );
if( !name || !val )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
function_remove( name );
d = malloc( sizeof( function_data_t ) );
@ -212,12 +208,8 @@ void function_add( const wchar_t *name,
int function_exists( const wchar_t *cmd )
{
if( !cmd )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( cmd, 0 );
if( parser_is_reserved(cmd) )
return 0;
@ -232,12 +224,8 @@ void function_remove( const wchar_t *name )
function_data_t *d;
event_t ev;
if( !name )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( name, );
hash_remove( &function,
name,
&key,
@ -259,12 +247,8 @@ const wchar_t *function_get_definition( const wchar_t *argv )
{
function_data_t *data;
if( !argv )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( argv, 0 );
load( argv );
data = (function_data_t *)hash_get( &function, argv );
if( data == 0 )
@ -275,12 +259,9 @@ const wchar_t *function_get_definition( const wchar_t *argv )
const wchar_t *function_get_desc( const wchar_t *argv )
{
function_data_t *data;
if( !argv )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( argv, 0 );
load( argv );
data = (function_data_t *)hash_get( &function, argv );
if( data == 0 )
@ -292,11 +273,9 @@ const wchar_t *function_get_desc( const wchar_t *argv )
void function_set_desc( const wchar_t *name, const wchar_t *desc )
{
function_data_t *data;
if( !name || !desc )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( name, );
CHECK( desc, );
load( name );
data = (function_data_t *)hash_get( &function, name );
@ -355,12 +334,8 @@ static void get_names_internal_all( void *key,
void function_get_names( array_list_t *list, int get_hidden )
{
if( !list )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( list, );
autoload_names( list, get_hidden );
if( get_hidden )
@ -378,12 +353,8 @@ const wchar_t *function_get_definition_file( const wchar_t *argv )
{
function_data_t *data;
if( !argv )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( argv, 0 );
load( argv );
data = (function_data_t *)hash_get( &function, argv );
if( data == 0 )
@ -397,12 +368,8 @@ int function_get_definition_offset( const wchar_t *argv )
{
function_data_t *data;
if( !argv )
{
debug( 0, L"%s called with null input", __func__ );
return -1;
}
CHECK( argv, -1 );
load( argv );
data = (function_data_t *)hash_get( &function, argv );
if( data == 0 )

9
highlight.c
View File

@ -533,14 +533,9 @@ void highlight_shell( wchar_t * buff,
void *context;
wchar_t *cmd=0;
if( !buff || !color )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( buff, );
CHECK( color, );
len = wcslen(buff);
if( !len )

14
parse_util.c
View File

@ -52,7 +52,10 @@ int parse_util_lineno( const wchar_t *str, int len )
static wchar_t *prev_str2 = 0;
static int i2 = 0;
static int res2 = 1;
CHECK( str, 0 );
if( str != prev_str || i>len )
{
if( prev_str2 == str && i2 <= len )
@ -100,6 +103,8 @@ int parse_util_locate_cmdsubst( const wchar_t *in,
wchar_t *paran_begin=0, *paran_end=0;
CHECK( in, 0 );
for( pos = (wchar_t *)in; *pos; pos++ )
{
if( prev != '\\' )
@ -176,14 +181,13 @@ void parse_util_cmdsubst_extent( const wchar_t *buff,
wchar_t *begin, *end;
wchar_t *pos;
CHECK( buff, );
if( a )
*a=0;
if( b )
*b = 0;
if( !buff )
return;
pos = (wchar_t *)buff;
while( 1 )
@ -243,6 +247,8 @@ static void job_or_process_extent( const wchar_t *buff,
tokenizer tok;
CHECK( buff, );
if( a )
*a=0;
if( b )
@ -342,6 +348,8 @@ void parse_util_token_extent( const wchar_t *buff,
wchar_t *a, *b, *pa, *pb;
CHECK( buff, );
assert( cursor_pos >= 0 );

49
parser.c
View File

@ -758,12 +758,8 @@ wchar_t *parser_get_filename( void *context, const wchar_t *cmd )
{
wchar_t *path;
if( !cmd )
{
debug( 0, L"%s called with null input", __func__ );
return 0;
}
CHECK( cmd, 0 );
debug( 3, L"parser_get_filename( '%ls' )", cmd );
if(wcschr( cmd, L'/' ) != 0 )
@ -1022,12 +1018,9 @@ int eval_args( const wchar_t *line, array_list_t *args )
int previous_pos=current_tokenizer_pos;
int do_loop=1;
if( !line || !args )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( line, 1 );
CHECK( args, 1 );
proc_push_interactive(0);
current_tokenizer = &tok;
current_tokenizer_pos = 0;
@ -1103,12 +1096,8 @@ void parser_stack_trace( block_t *b, string_buffer_t *buff)
/*
Validate input
*/
if( !buff )
{
debug( 0, L"%s called with null input", __func__ );
return;
}
CHECK( buff, );
/*
Check if we should end the recursion
*/
@ -2738,12 +2727,8 @@ static int parser_test_argument( const wchar_t *arg, string_buffer_t *out, const
wchar_t *arg_cpy;
int do_loop = 1;
if( !arg )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( arg, 1 );
arg_cpy = wcsdup( arg );
while( do_loop )
@ -2910,12 +2895,8 @@ int parser_test_args(const wchar_t * buff,
int do_loop = 1;
int err = 0;
if( !buff )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( buff, 1 );
current_tokenizer = &tok;
for( tok_init( &tok, buff, 0 );
@ -3008,12 +2989,8 @@ int parser_test( const wchar_t * buff,
int arg_count=0;
wchar_t *cmd=0;
if( !buff )
{
debug( 0, L"%s called with null input", __func__ );
return 1;
}
CHECK( buff, 1 );
context = halloc( 0, 0 );
current_tokenizer = &tok;

42
tokenizer.c
View File

@ -29,18 +29,16 @@
Error string for unexpected end of string
*/
#define EOL_ERROR _( L"Unexpected end of token" )
/**
Error string for mismatched parenthesis
*/
#define PARAN_ERROR _( L"Parenthesis mismatch" )
/**
Error string for invalid redirections
*/
#define REDIRECT_ERROR _( L"Invalid redirection" )
/**
Error string for invalid input
*/
#define INPUT_ERROR _( L"Invalid input" )
/**
Error string for when trying to pipe from fd 0
@ -118,8 +116,9 @@ static void tok_error( tokenizer *tok, const wchar_t *err )
void tok_init( tokenizer *tok, const wchar_t *b, int flags )
{
// fwprintf( stderr, L"CREATE: \'%ls\'\n", b );
CHECK( tok, );
CHECK( b, );
memset( tok, 0, sizeof( tokenizer) );
@ -127,17 +126,6 @@ void tok_init( tokenizer *tok, const wchar_t *b, int flags )
tok->show_comments = flags & TOK_SHOW_COMMENTS;
tok->has_next=1;
/*
Before we copy the buffer we need to check that it is not
null. But before that, we need to init the tokenizer far enough
so that errors can be properly flagged
*/
if( !b )
{
tok_error( tok, INPUT_ERROR );
return;
}
tok->has_next = (*b != L'\0');
tok->orig_buff = tok->buff = (wchar_t *)(b);
@ -165,6 +153,8 @@ void tok_init( tokenizer *tok, const wchar_t *b, int flags )
void tok_destroy( tokenizer *tok )
{
CHECK( tok, );
free( tok->last );
if( tok->free_orig )
free( tok->orig_buff );
@ -172,11 +162,15 @@ void tok_destroy( tokenizer *tok )
int tok_last_type( tokenizer *tok )
{
CHECK( tok, 0 );
return tok->last_type;
}
wchar_t *tok_last( tokenizer *tok )
{
CHECK( tok, 0 );
return tok->last;
}
@ -470,6 +464,8 @@ static void read_redirect( tokenizer *tok, int fd )
wchar_t tok_last_quote( tokenizer *tok )
{
CHECK( tok, 0 );
return tok->last_quote;
}
@ -488,15 +484,19 @@ static int my_iswspace( wchar_t c )
const wchar_t *tok_get_desc( int type )
{
if( type < 0 || type >= sizeof( tok_desc ) )
{
return _(L"Invalid token type");
}
return _(tok_desc[type]);
}
void tok_next( tokenizer *tok )
{
// fwprintf( stderr, L"tok_next on %ls (prev=%ls)\n", tok->orig_buff, tok_desc[tok->last_type] );
CHECK( tok, );
if( tok_last_type( tok ) == TOK_ERROR )
{
tok->has_next=0;
@ -619,6 +619,8 @@ wchar_t *tok_first( const wchar_t *str )
tokenizer t;
wchar_t *res=0;
CHECK( str, 0 );
tok_init( &t, str, 0 );
switch( tok_last_type( &t ) )
@ -638,12 +640,16 @@ wchar_t *tok_first( const wchar_t *str )
int tok_get_pos( tokenizer *tok )
{
CHECK( tok, 0 );
return tok->last_pos + (tok->free_orig?1:0);
}
void tok_set_pos( tokenizer *tok, int pos )
{
CHECK( tok, );
tok->buff = tok->orig_buff + pos;
tok->has_next = 1;
tok_next( tok );