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028e1f36a1
fish-shell/builtin.c
axel 028e1f36a1 Improve the status builtin 
darcs-hash:20060130195310-ac50b-5da6881a847170242be56555646bbf037218d545.gz
2006-01-31 05:53:10 +10:00

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/** \file builtin.c
Functions for executing builtin functions.
How to add a new builtin function:
1). Create a function in builtin.c with the following signature:
<tt>static int builtin_NAME( wchar_t ** args )</tt>
where NAME is the name of the builtin, and args is a zero-terminated list of arguments.
2). Add a line like hash_put( &builtin, L"NAME", &builtin_NAME ); to builtin_init. This will enable the parser to find the builtin function.
3). Add a line like hash_put( desc, L"NAME", _(L"Bla bla bla") ); to the proper part of builtin_get_desc, containing a short description of what the builtin does. This description is used by the completion system.
4). Create a file doc_src/NAME.txt, containing the manual for the builtin in Doxygen-format. Check the other builtin manuals for proper syntax.
5). Add an entry to the BUILTIN_DOC_SRC variable of Makefile.in. Note that the entries should be sorted alphabetically!
6). Add an entry to the manual at the builtin-overview subsection. Note that the entries should be sorted alphabetically!
7). Use 'darcs add doc_src/NAME.txt' to start tracking changes to the documentation file.
*/
#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <unistd.h>
#include <termios.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#include <signal.h>
#include <wctype.h>
#include <sys/time.h>
#include <time.h>
#include "config.h"
#include "util.h"
#include "wutil.h"
#include "builtin.h"
#include "function.h"
#include "complete.h"
#include "proc.h"
#include "parser.h"
#include "reader.h"
#include "env.h"
#include "expand.h"
#include "common.h"
#include "wgetopt.h"
#include "sanity.h"
#include "tokenizer.h"
#include "builtin_help.h"
#include "wildcard.h"
#include "input_common.h"
#include "input.h"
#include "intern.h"
#include "event.h"
#include "signal.h"
#include "translate.h"
/**
The default prompt for the read command
*/
#define DEFAULT_READ_PROMPT L"set_color green; echo read; set_color normal; echo \"> \""
/**
The mode name to pass to history and input
*/
#define READ_MODE_NAME L"fish_read"
/**
The send stuff to foreground message
*/
#define FG_MSG _( L"Send job %d, '%ls' to foreground\n" )
/**
Print modes for the jobs builtin
*/
enum
{
JOBS_DEFAULT, /**< Print lots of general info */
JOBS_PRINT_PID, /**< Print pid of each process in job */
JOBS_PRINT_COMMAND, /**< Print command name of each process in job */
JOBS_PRINT_GROUP, /**< Print group id of job */
}
;
/**
Table of all builtins
*/
static hash_table_t builtin;
int builtin_out_redirect;
int builtin_err_redirect;
/*
Buffers for storing the output of builtin functions
*/
string_buffer_t *sb_out=0, *sb_err=0;
/**
Stack containing builtin I/O for recursive builtin calls.
*/
static array_list_t io_stack;
/**
The file from which builtin functions should attempt to read, use
instead of stdin.
*/
static int builtin_stdin;
/**
Table containing descriptions for all builtins
*/
static hash_table_t *desc=0;
int builtin_count_args( wchar_t **argv )
{
int argc = 1;
while( argv[argc] != 0 )
{
argc++;
}
return argc;
}
void builtin_wperror( const wchar_t *s)
{
if( s != 0 )
{
sb_append2( sb_err, s, L": ", (void *)0 );
}
char *err = strerror( errno );
wchar_t *werr = str2wcs( err );
if( werr )
{
sb_append2( sb_err, werr, L"\n", (void *)0 );
free( werr );
}
}
/*
Here follows the definition of all builtin commands. The function
names are all on the form builtin_NAME where NAME is the name of the
builtin. so the function name for the builtin 'jobs' is
'builtin_jobs'.
Two builtins, 'command' and 'builtin' are not defined here as they
are part of the parser. (They are not parsed as commands, instead
they only slightly alter the parser state)
*/
/**
Noop function. A fake function which successfully does nothing, for
builtins which are handled by the parser, such as command and
while.
*/
static int builtin_ignore( wchar_t **argv )
{
return 0;
}
void builtin_print_help( wchar_t *cmd, string_buffer_t *b )
{
const char *h;
if( b == sb_err )
{
sb_append( sb_err,
parser_current_line() );
}
h = builtin_help_get( cmd );
if( !h )
return;
wchar_t *str = str2wcs(builtin_help_get( cmd ));
if( str )
{
sb_append( b, str );
free( str );
}
}
/**
The bind builtin, used for setting character sequences
*/
static int builtin_bind( wchar_t **argv )
{
int i;
int argc=builtin_count_args( argv );
woptind=0;
const static struct woption
long_options[] =
{
{
L"set-mode", required_argument, 0, 'M'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"M:",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'M':
input_set_mode( woptarg );
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
for( i=woptind; i<argc; i++ )
{
input_parse_inputrc_line( argv[i] );
}
return 0;
}
/**
The block builtin, used for temporarily blocking events
*/
static int builtin_block( wchar_t **argv )
{
enum
{
UNSET,
GLOBAL,
LOCAL,
}
;
int scope=UNSET;
int erase = 0;
int argc=builtin_count_args( argv );
int type = (1<<EVENT_ANY);
woptind=0;
const static struct woption
long_options[] =
{
{
L"erase", no_argument, 0, 'e'
}
,
{
L"local", no_argument, 0, 'l'
}
,
{
L"global", no_argument, 0, 'g'
}
,
{
L"help", no_argument, 0, 'h'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"elgh",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_err );
return 0;
case 'g':
scope = GLOBAL;
break;
case 'l':
scope = LOCAL;
break;
case 'e':
erase = 1;
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
if( erase )
{
if( scope != UNSET )
{
sb_printf( sb_err, _( L"%ls: Can not specify scope when removing block\n" ), argv[0] );
return 1;
}
if( !global_event_block )
{
sb_printf( sb_err, _( L"%ls: No blocks defined\n" ), argv[0] );
return 1;
}
event_block_t *eb = global_event_block;
global_event_block = eb->next;
free( eb );
}
else
{
block_t *block=current_block;
event_block_t *eb = malloc( sizeof( event_block_t ) );
if( !eb )
die_mem();
eb->type = type;
switch( scope )
{
case LOCAL:
{
if( !block->outer )
block=0;
break;
}
case GLOBAL:
{
block=0;
}
case UNSET:
{
while( block && block->type != FUNCTION_CALL )
block = block->outer;
}
}
if( block )
{
eb->next = block->first_event_block;
block->first_event_block = eb;
}
else
{
eb->next = global_event_block;
global_event_block=eb;
}
}
return 0;
}
/**
The builtin builtin, used for given builtins precedence over functions. Mostly handled by the parser. All this code does is some additional operational modes, such as printing a list of all builtins.
*/
static int builtin_builtin( wchar_t **argv )
{
int argc=builtin_count_args( argv );
int list=0;
woptind=0;
const static struct woption
long_options[] =
{
{
L"names", no_argument, 0, 'n'
}
,
{
L"help", no_argument, 0, 'h'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"nh",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_err );
return 0;
case 'n':
list=1;
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
if( list )
{
array_list_t names;
wchar_t **names_arr;
int i;
al_init( &names );
builtin_get_names( &names );
names_arr = list_to_char_arr( &names );
qsort( names_arr,
al_get_count( &names ),
sizeof(wchar_t *),
(int (*)(const void *, const void *))&wcsfilecmp );
for( i=0; i<al_get_count( &names ); i++ )
{
if( wcscmp( names_arr[i], L"count" ) == 0 )
continue;
sb_append2( sb_out,
names_arr[i],
L"\n",
(void *)0 );
}
free( names_arr );
al_destroy( &names );
}
return 0;
}
/**
A generic bultin that only supports showing a help message. This is
only a placeholder that prints the help message. Useful for
commands that live in hte parser.
*/
static int builtin_generic( wchar_t **argv )
{
int argc=builtin_count_args( argv );
woptind=0;
const static struct woption
long_options[] =
{
{
L"help", no_argument, 0, 'h'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"h",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_out );
return 0;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
return 1;
}
/**
The exec bultin. This is only a placeholder that prints the help message. Ther actual implementation lives in exec.c.
*/
static int builtin_exec( wchar_t **argv )
{
int argc=builtin_count_args( argv );
woptind=0;
const static struct woption
long_options[] =
{
{
L"help", no_argument, 0, 'h'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"h",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_out );
return 0;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
return 1;
}
/**
Print the definition of the given function to sb_out
stringbuffer. Used by the functions builtin.
*/
static void functions_def( wchar_t *name )
{
const wchar_t *desc = function_get_desc( name );
const wchar_t *def = function_get_definition(name);
array_list_t ev;
event_t search;
int i;
search.function_name = name;
search.type = EVENT_ANY;
al_init( &ev );
event_get( &search, &ev );
sb_append2( sb_out,
L"function ",
name,
(void *)0);
if( desc && wcslen(desc) )
{
wchar_t *esc_desc = escape( desc, 1 );
sb_append2( sb_out, L" --description ", esc_desc, (void *)0 );
free( esc_desc );
}
for( i=0; i<al_get_count( &ev); i++ )
{
event_t *next = (event_t *)al_get( &ev, i );
switch( next->type )
{
case EVENT_SIGNAL:
{
sb_printf( sb_out, L" --on-signal %ls", sig2wcs( next->param1.signal ) );
break;
}
case EVENT_VARIABLE:
{
sb_printf( sb_out, L" --on-variable %ls", next->param1.variable );
break;
}
case EVENT_EXIT:
{
if( next->param1.pid > 0 )
sb_printf( sb_out, L" --on-process-exit %d", next->param1.pid );
else
sb_printf( sb_out, L" --on-job-exit %d", -next->param1.pid );
break;
}
case EVENT_JOB_ID:
{
job_t *j = job_get( next->param1.job_id );
if( j )
sb_printf( sb_out, L" --on-job-exit %d", j->pgid );
break;
}
}
}
al_destroy( &ev );
sb_append2( sb_out,
L"\n\t",
def,
L"\nend\n\n",
(void *)0);
}
/**
The functions builtin, used for listing and erasing functions.
*/
static int builtin_functions( wchar_t **argv )
{
int i;
int erase=0;
wchar_t *desc=0;
array_list_t names;
wchar_t **names_arr;
int argc=builtin_count_args( argv );
int list=0;
int show_hidden=0;
int res = 0;
woptind=0;
const static struct woption
long_options[] =
{
{
L"erase", no_argument, 0, 'e'
}
,
{
L"description", required_argument, 0, 'd'
}
,
{
L"names", no_argument, 0, 'n'
}
,
{
L"all", no_argument, 0, 'a'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"ed:na",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'e':
erase=1;
break;
case 'd':
desc=woptarg;
break;
case 'n':
list=1;
break;
case 'a':
show_hidden=1;
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
/*
Erase, desc and list are mutually exclusive
*/
if( (erase + (desc!=0) + list) > 1 )
{
sb_printf( sb_err,
_( L"%ls: Invalid combination of options\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( erase )
{
int i;
for( i=woptind; i<argc; i++ )
function_remove( argv[i] );
return 0;
}
else if( desc )
{
wchar_t *func;
if( argc-woptind != 1 )
{
sb_printf( sb_err,
_( L"%ls: Expected exactly one function name\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
func = argv[woptind];
if( !function_exists( func ) )
{
sb_printf( sb_err,
_( L"%ls: Function '%ls' does not exist\n" ),
argv[0],
func );
builtin_print_help( argv[0], sb_err );
return 1;
}
function_set_desc( func, desc );
return 0;
}
else if( list )
{
int is_screen = !builtin_out_redirect && isatty(1);
al_init( &names );
function_get_names( &names, show_hidden );
names_arr = list_to_char_arr( &names );
qsort( names_arr,
al_get_count( &names ),
sizeof(wchar_t *),
(int (*)(const void *, const void *))&wcsfilecmp );
if( is_screen )
{
string_buffer_t buff;
sb_init( &buff );
for( i=0; i<al_get_count( &names ); i++ )
{
sb_append2( &buff,
names_arr[i],
L", ",
(void *)0 );
}
write_screen( (wchar_t *)buff.buff );
sb_destroy( &buff );
}
else
{
for( i=0; i<al_get_count( &names ); i++ )
{
sb_append2( sb_out,
names_arr[i],
L"\n",
(void *)0 );
}
}
free( names_arr );
al_destroy( &names );
return 0;
}
switch( argc - woptind )
{
case 0:
{
sb_append( sb_out, _( L"Current function definitions are:\n\n" ) );
al_init( &names );
function_get_names( &names, show_hidden );
names_arr = list_to_char_arr( &names );
qsort( names_arr,
al_get_count( &names ),
sizeof(wchar_t *),
(int (*)(const void *, const void *))&wcsfilecmp );
for( i=0; i<al_get_count( &names ); i++ )
{
functions_def( names_arr[i] );
}
free( names_arr );
al_destroy( &names );
break;
}
default:
{
for( i=woptind; i<argc; i++ )
{
if( !function_exists( argv[i] ) )
res++;
else
{
functions_def( argv[i] );
}
}
break;
}
}
return res;
}
/**
Test whether the specified string is a valid name for a keybinding
*/
static int wcsbindingname( wchar_t *str )
{
while( *str )
{
if( (!iswalnum(*str)) && (*str != L'-' ) )
{
return 0;
}
str++;
}
return 1;
}
/**
The function builtin, used for providing subroutines.
It calls various functions from function.c to perform any heavy lifting.
*/
static int builtin_function( wchar_t **argv )
{
int argc = builtin_count_args( argv );
int res=0;
wchar_t *desc=0;
int is_binding=0;
array_list_t *events = al_new();
woptind=0;
const static struct woption
long_options[] =
{
{
L"description", required_argument, 0, 'd'
}
,
{
L"key-binding", no_argument, 0, 'b'
}
,
{
L"on-signal", required_argument, 0, 's'
}
,
{
L"on-job-exit", required_argument, 0, 'j'
}
,
{
L"on-process-exit", required_argument, 0, 'p'
}
,
{
L"on-variable", required_argument, 0, 'v'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 && (!res ) )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"bd:s:j:p:v:",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
res = 1;
break;
case 'd':
desc=woptarg;
break;
case 'b':
is_binding=1;
break;
case 's':
{
int sig = wcs2sig( woptarg );
event_t *e;
if( sig < 0 )
{
sb_printf( sb_err,
_( L"%ls: Unknown signal '%ls'\n" ),
argv[0],
woptarg );
res=1;
break;
}
e = calloc( 1, sizeof(event_t));
if( !e )
die_mem();
e->type = EVENT_SIGNAL;
e->param1.signal = sig;
e->function_name=0;
al_push( events, e );
break;
}
case 'v':
{
event_t *e;
if( !wcsvarname( woptarg ) )
{
sb_printf( sb_err,
_( L"%ls: Invalid variable name '%ls'\n" ),
argv[0],
woptarg );
res=1;
break;
}
e = calloc( 1, sizeof(event_t));
if( !e )
die_mem();
e->type = EVENT_VARIABLE;
e->param1.variable = wcsdup( woptarg );
e->function_name=0;
al_push( events, e );
break;
}
case 'j':
case 'p':
{
pid_t pid;
wchar_t *end;
event_t *e;
e = calloc( 1, sizeof(event_t));
if( !e )
die_mem();
if( ( opt == 'j' ) &&
( wcscasecmp( woptarg, L"caller" ) == 0 ) )
{
int job_id = -1;
if( is_subshell )
{
block_t *b = current_block;
while( b && (b->type != SUBST) )
b = b->outer;
if( b )
{
b=b->outer;
}
if( b->job )
{
job_id = b->job->job_id;
}
}
if( job_id == -1 )
{
sb_printf( sb_err,
_( L"%ls: Cannot find calling job for event handler\n" ),
argv[0] );
res=1;
}
else
{
e->type = EVENT_JOB_ID;
e->param1.job_id = job_id;
}
}
else
{
errno = 0;
pid = wcstol( woptarg, &end, 10 );
if( errno || !end || *end )
{
sb_printf( sb_err,
_( L"%ls: Invalid process id %ls\n" ),
argv[0],
woptarg );
res=1;
break;
}
e->type = EVENT_EXIT;
e->param1.pid = (opt=='j'?-1:1)*abs(pid);
}
if( res )
{
free( e );
}
else
{
e->function_name=0;
al_push( events, e );
}
break;
}
case '?':
builtin_print_help( argv[0], sb_err );
res = 1;
break;
}
}
if( !res )
{
if( argc-woptind != 1 )
{
sb_printf( sb_err,
_( L"%ls: Expected one argument, got %d\n" ),
argv[0],
argc-woptind );
res=1;
}
else if( !(is_binding?wcsbindingname( argv[woptind] ) : wcsvarname( argv[woptind] ) ))
{
sb_printf( sb_err,
_( L"%ls: Illegal function name '%ls'\n" ),
argv[0],
argv[woptind] );
res=1;
}
else if( parser_is_reserved(argv[woptind] ) )
{
sb_printf( sb_err,
_( L"%ls: The name '%ls' is reserved,\nand can not be used as a function name\n" ),
argv[0],
argv[woptind] );
res=1;
}
}
if( res )
{
int i;
array_list_t names;
wchar_t **names_arr;
int chars=0;
// builtin_print_help( argv[0], sb_err );
const wchar_t *cfa = _( L"Current functions are: " );
sb_append( sb_err, cfa );
chars += wcslen( cfa );
al_init( &names );
function_get_names( &names, 0 );
names_arr = list_to_char_arr( &names );
qsort( names_arr,
al_get_count( &names ),
sizeof(wchar_t *),
(int (*)(const void *, const void *))&wcsfilecmp );
for( i=0; i<al_get_count( &names ); i++ )
{
wchar_t *nxt = names_arr[i];
int l = wcslen( nxt + 2 );
if( chars+l > common_get_width() )
{
chars = 0;
sb_append(sb_err, L"\n" );
}
sb_append2( sb_err,
nxt, L" ", (void *)0 );
}
free( names_arr );
al_destroy( &names );
sb_append( sb_err, L"\n" );
parser_push_block( FAKE );
al_foreach( events, (void (*)(const void *))&event_free );
al_destroy( events );
free( events );
}
else
{
int i;
parser_push_block( FUNCTION_DEF );
current_block->param1.function_name=wcsdup(argv[woptind]);
current_block->param2.function_description=desc?wcsdup(desc):0;
current_block->param3.function_is_binding = is_binding;
current_block->param4.function_events = events;
for( i=0; i<al_get_count( events ); i++ )
{
event_t *e = (event_t *)al_get( events, i );
e->function_name = wcsdup( current_block->param1.function_name );
}
}
current_block->tok_pos = parser_get_pos();
current_block->skip = 1;
return 0;
}
/**
The random builtin. For generating random numbers.
*/
static int builtin_random( wchar_t **argv )
{
static int seeded=0;
int argc = builtin_count_args( argv );
woptind=0;
const static struct woption
long_options[] =
{
{
L"help", no_argument, 0, 'h'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"h",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_err );
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
switch( argc-woptind )
{
case 0:
{
if( !seeded )
{
seeded=1;
srand( time( 0 ) );
}
sb_printf( sb_out, L"%d\n", rand()%32767 );
break;
}
case 1:
{
int foo;
wchar_t *end=0;
errno=0;
foo = wcstol( argv[woptind], &end, 10 );
if( errno || *end )
{
sb_printf( sb_err,
_( L"%ls: Seed value '%ls' is not a valid number\n" ),
argv[0],
argv[woptind] );
return 1;
}
seeded=1;
srand( foo );
break;
}
default:
{
sb_printf( sb_err,
_( L"%ls: Expected zero or one argument, got %d\n" ),
argv[0],
argc-woptind );
builtin_print_help( argv[0], sb_err );
return 1;
}
}
return 0;
}
/**
The read builtin. Reads from stdin and stores the values in environment variables.
*/
static int builtin_read( wchar_t **argv )
{
wchar_t *buff=0;
int i, argc = builtin_count_args( argv );
wchar_t *ifs;
int place = ENV_USER;
wchar_t *nxt;
wchar_t *prompt = DEFAULT_READ_PROMPT;
wchar_t *commandline = L"";
woptind=0;
while( 1 )
{
const static struct woption
long_options[] =
{
{
L"export", no_argument, 0, 'x'
}
,
{
L"global", no_argument, 0, 'g'
}
,
{
L"local", no_argument, 0, 'l'
}
,
{
L"universal", no_argument, 0, 'U'
}
,
{
L"unexport", no_argument, 0, 'u'
}
,
{
L"prompt", required_argument, 0, 'p'
}
,
{
L"command", required_argument, 0, 'c'
}
,
{
0, 0, 0, 0
}
}
;
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"xglUup:c:",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case L'x':
place |= ENV_EXPORT;
break;
case L'g':
place |= ENV_GLOBAL;
break;
case L'l':
place |= ENV_LOCAL;
break;
case L'U':
place |= ENV_UNIVERSAL;
break;
case L'u':
place |= ENV_UNEXPORT;
break;
case L'p':
prompt = woptarg;
break;
case L'c':
commandline = woptarg;
break;
case L'?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
if( ( place & ENV_UNEXPORT ) && ( place & ENV_EXPORT ) )
{
sb_printf( sb_err,
BUILTIN_ERR_EXPUNEXP,
argv[0],
parser_current_line() );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( (place&ENV_LOCAL?1:0) + (place & ENV_GLOBAL?1:0) + (place & ENV_UNIVERSAL?1:0) > 1)
{
sb_printf( sb_err,
BUILTIN_ERR_GLOCAL,
argv[0],
parser_current_line() );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( woptind == argc )
{
sb_printf( sb_err,
BUILTIN_ERR_MISSING,
argv[0] );
sb_append2( sb_err,
parser_current_line(),
L"\n",
(void *)0 );
builtin_print_help( argv[0], sb_err );
return 1;
}
/*
Verify all variable names
*/
for( i=woptind; i<argc; i++ )
{
wchar_t *src;
if( !wcslen( argv[i] ) )
{
sb_printf( sb_err, BUILTIN_ERR_VARNAME_ZERO, argv[0] );
return 1;
}
for( src=argv[i]; *src; src++ )
{
if( (!iswalnum(*src)) && (*src != L'_' ) )
{
sb_printf( sb_err, BUILTIN_ERR_VARCHAR, argv[0], *src );
sb_append2(sb_err, parser_current_line(), L"\n", (void *)0 );
return 1;
}
}
}
/*
The call to reader_readline may change woptind, so we save it away here
*/
i=woptind;
ifs = env_get( L"IFS" );
if( ifs == 0 )
ifs = L"";
/*
Check if we should read interactively using \c reader_readline()
*/
if( isatty(0) && builtin_stdin == 0 )
{
reader_push( READ_MODE_NAME );
reader_set_prompt( prompt );
reader_set_buffer( commandline, wcslen( commandline ) );
buff = wcsdup(reader_readline( ));
reader_pop();
}
else
{
string_buffer_t sb;
sb_init( &sb );
while( 1 )
{
int eof=0;
int finished=0;
wchar_t res=0;
static mbstate_t state;
memset (&state, '\0', sizeof (state));
while( !finished )
{
char b;
int read_res = read_blocked( builtin_stdin, &b, 1 );
if( read_res <= 0 )
{
eof=1;
break;
}
int sz = mbrtowc( &res, &b, 1, &state );
switch( sz )
{
case -1:
memset (&state, '\0', sizeof (state));
break;
case -2:
break;
case 0:
eof=1;
finished = 1;
break;
default:
finished=1;
break;
}
}
if( eof )
break;
if( res == L'\n' )
break;
sb_append_char( &sb, res );
}
buff = wcsdup( (wchar_t *)sb.buff );
sb_destroy( &sb );
}
wchar_t *state;
nxt = wcstok( buff, (i<argc-1)?ifs:L"", &state );
while( i<argc )
{
env_set( argv[i], nxt != 0 ? nxt: L"", place );
i++;
if( nxt != 0 )
nxt = wcstok( 0, (i<argc-1)?ifs:L"", &state);
}
free( buff );
return 0;
}
/**
The status builtin. Gives various status information on fish.
*/
static int builtin_status( wchar_t **argv )
{
enum
{
NORMAL,
IS_SUBST,
IS_BLOCK,
IS_INTERACTIVE,
IS_LOGIN,
IS_FULL_JOB_CONTROL,
IS_INTERACTIVE_JOB_CONTROL,
IS_NO_JOB_CONTROL,
STACK_TRACE,
DONE,
}
;
int mode = NORMAL;
int argc = builtin_count_args( argv );
int res=0;
woptind=0;
const struct woption
long_options[] =
{
{
L"help", no_argument, 0, 'h'
}
,
{
L"is-command-substitution", no_argument, &mode, IS_SUBST
}
,
{
L"is-block", no_argument, &mode, IS_BLOCK
}
,
{
L"is-interactive", no_argument, &mode, IS_INTERACTIVE
}
,
{
L"is-login", no_argument, &mode, IS_LOGIN
}
,
{
L"is-full-job-control", no_argument, &mode, IS_FULL_JOB_CONTROL
}
,
{
L"is-interactive-job-control", no_argument, &mode, IS_INTERACTIVE_JOB_CONTROL
}
,
{
L"is-no-job-control", no_argument, &mode, IS_NO_JOB_CONTROL
}
,
{
L"job-control", required_argument, 0, 'j'
}
,
{
L"print-stack-trace", no_argument, 0, 't'
}
,
{
0, 0, 0, 0
}
}
;
while( 1 )
{
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"hjt",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case 'h':
builtin_print_help( argv[0], sb_err );
return 0;
case 'j':
if( wcscmp( woptarg, L"full" ) == 0 )
job_control_mode = JOB_CONTROL_ALL;
else if( wcscmp( woptarg, L"interactive" ) == 0 )
job_control_mode = JOB_CONTROL_INTERACTIVE;
else if( wcscmp( woptarg, L"none" ) == 0 )
job_control_mode = JOB_CONTROL_NONE;
else
{
sb_printf( sb_err,
L"%ls: Invalid job control mode '%ls'\n",
woptarg );
res = 1;
}
mode = DONE;
break;
case '?':
builtin_print_help( argv[0], sb_err );
return 1;
}
}
if( !res )
{
switch( mode )
{
case IS_INTERACTIVE:
return !is_interactive_session;
case IS_SUBST:
return !is_subshell;
case IS_BLOCK:
return !is_block;
case IS_LOGIN:
return !is_login;
case IS_FULL_JOB_CONTROL:
return job_control_mode != JOB_CONTROL_ALL;
case IS_INTERACTIVE_JOB_CONTROL:
return job_control_mode != JOB_CONTROL_INTERACTIVE;
case IS_NO_JOB_CONTROL:
return job_control_mode != JOB_CONTROL_NONE;
case STACK_TRACE:
{
parser_stack_trace( current_block, sb_out );
break;
}
case NORMAL:
{
if( is_login )
sb_printf( sb_out, _( L"This is a login shell\n" ) );
else
sb_printf( sb_out, _( L"This is not a login shell\n" ) );
sb_printf( sb_out, _(L"Job control: %ls\n"),
job_control_mode==JOB_CONTROL_INTERACTIVE?_(L"Only on interactive jobs"):
(job_control_mode==JOB_CONTROL_NONE?_(L"Never"):_(L"Always")) );
parser_stack_trace( current_block, sb_out );
break;
}
}
}
return res;
}
/**
The eval builtin. Concatenates the arguments and calls eval on the
result.
*/
static int builtin_eval( wchar_t **argv )
{
string_buffer_t sb;
int i;
int argc = builtin_count_args( argv );
sb_init( &sb );
for( i=1; i<argc; i++ )
{
sb_append( &sb, argv[i] );
sb_append( &sb, L" " );
}
eval( (wchar_t *)sb.buff, block_io, TOP );
sb_destroy( &sb );
return proc_get_last_status();
}
/**
The exit builtin. Calls reader_exit to exit and returns the value specified.
*/
static int builtin_exit( wchar_t **argv )
{
int argc = builtin_count_args( argv );
int ec=0;
switch( argc )
{
case 1:
break;
case 2:
{
wchar_t *end;
errno = 0;
ec = wcstol(argv[1],&end,10);
if( errno || *end != 0)
{
sb_printf( sb_err,
_( L"%ls: Argument '%ls' must be an integer\n" ),
argv[0],
argv[1] );
builtin_print_help( argv[0], sb_err );
return 1;
}
break;
}
default:
sb_printf( sb_err,
_( L"%ls: Too many arguments\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
reader_exit( 1 );
return ec;
}
/**
Helper function for builtin_cd, used for seting the current working directory
*/
static int set_pwd(wchar_t *env)
{
wchar_t dir_path[4096];
wchar_t *res = wgetcwd( dir_path, 4096 );
if( !res )
{
builtin_wperror( L"wgetcwd" );
return 0;
}
env_set( env, dir_path, ENV_EXPORT | ENV_GLOBAL );
return 1;
}
/**
The cd builtin. Changes the current directory to the one specified
or to $HOME if none is specified. If '-' is the directory specified,
the directory is changed to the previous working directory. The
directory can be relative to any directory in the CDPATH variable.
*/
static int builtin_cd( wchar_t **argv )
{
wchar_t *dir_in;
wchar_t *dir;
int res=0;
if( argv[1] == 0 )
{
dir_in = env_get( L"HOME" );
if( !dir_in )
{
sb_printf( sb_err,
_( L"%ls: Could not find home directory\n" ),
argv[0] );
}
}
else
dir_in = argv[1];
dir = parser_cdpath_get( dir_in );
if( !dir )
{
sb_printf( sb_err,
_( L"%ls: '%ls' is not a directory or you do not have permission to enter it\n" ),
argv[0],
dir_in );
sb_append2( sb_err,
parser_current_line(),
(void *)0 );
return 1;
}
if( wchdir( dir ) != 0 )
{
sb_printf( sb_err,
_( L"%ls: '%ls' is not a directory\n" ),
argv[0],
dir );
sb_append2( sb_err,
parser_current_line(),
(void *)0 );
free( dir );
return 1;
}
if (!set_pwd(L"PWD"))
{
res=1;
sb_printf( sb_err, _( L"%ls: Could not set PWD variable\n" ), argv[0] );
}
free( dir );
return res;
}
/**
The . (dot) builtin, sometimes called source. Evaluates the contents of a file.
*/
static int builtin_source( wchar_t ** argv )
{
int fd;
int res;
struct stat buf;
int argc;
argc = builtin_count_args( argv );
if( argc != 2 )
{
sb_printf( sb_err, _( L"%ls: Expected exactly one argument, got %d\n" ), argv[0], argc );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( wstat(argv[1], &buf) == -1 )
{
builtin_wperror( L"stat" );
return 1;
}
if( !S_ISREG(buf.st_mode) )
{
sb_printf( sb_err, _( L"%ls: '%ls' is not a file\n" ), argv[0], argv[1] );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( ( fd = wopen( argv[1], O_RDONLY ) ) == -1 )
{
builtin_wperror( L"open" );
res = 1;
}
else
{
/*
Push a new non-shadowwing variable scope to the stack. That
way one can use explicitly local variables in sourced files
that will die on return to the calling file.
*/
int lineno = parser_get_lineno();
wchar_t *file = parser_current_filename()?wcsdup(parser_current_filename()):0;
reader_push_current_filename( argv[1] );
parser_push_block( SOURCE );
current_block->param1.source_dest = wcsdup( argv[1] );
current_block->param3.call_lineno = lineno;
current_block->param4.call_filename = file;
res = reader_read( fd );
parser_pop_block();
if( res )
{
sb_printf( sb_err,
_( L"%ls: Error while reading file '%ls'\n" ),
argv[0],
argv[1]
);
}
/*
Do not close fd after calling reader_read. reader_read
automatically closes it before calling eval.
*/
reader_pop_current_filename();
}
return res;
}
/**
Make the specified job the first job of the job list. Moving jobs
around in the list makes the list reflect the order in which the
jobs were used.
*/
static void make_first( job_t *j )
{
job_t *prev=0;
job_t *curr;
for( curr = first_job; curr != j; curr = curr->next )
{
prev=curr;
}
if( curr == j )
{
if( prev == 0 )
return;
else
{
prev->next = curr->next;
curr->next = first_job;
first_job = curr;
}
}
}
/**
Builtin for putting a job in the foreground
*/
static int builtin_fg( wchar_t **argv )
{
job_t *j;
if( argv[1] == 0 )
{
/*
Select last constructed job (I.e. first job in the job que) that is possible to put in the foreground
*/
for( j=first_job; j; j=j->next )
{
if( j->constructed && (!job_is_completed(j)) && ( (job_is_stopped(j) || !j->fg) && (j->job_control)))
break;
}
if( !j )
{
sb_printf( sb_err,
_( L"%ls: There are no suitable jobs\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
}
}
else if( argv[2] != 0 )
{
/*
Specifying what more than one job to put to the foreground
is a syntax error, we still try to locate the job argv[1],
since we want to know if this is an ambigous job
specification or if this is an malformed job id
*/
int pid = wcstol( argv[1], 0, 10 );
j = job_get_from_pid( pid );
if( j != 0 )
{
sb_printf( sb_err,
_( L"%ls: Ambiguous job\n" ),
argv[0] );
}
else
{
sb_printf( sb_err,
_( L"%ls: '%ls' is not a job\n" ),
argv[0],
argv[1] );
}
builtin_print_help( argv[0], sb_err );
j=0;
}
else
{
int pid = abs(wcstol( argv[1], 0, 10 ));
j = job_get_from_pid( pid );
if( !j )
{
sb_printf( sb_err,
_( L"%ls: No suitable job: %d\n" ),
argv[0],
pid );
builtin_print_help( argv[0], sb_err );
}
if( !j->job_control )
{
sb_printf( sb_err,
_( L"%ls: Can't put job %d, '%ls' to foreground because it is not under job control\n" ),
argv[0],
pid,
j->command );
builtin_print_help( argv[0], sb_err );
j=0;
}
}
if( j )
{
if( builtin_err_redirect )
{
sb_printf( sb_err,
FG_MSG,
j->job_id,
j->command );
}
else
{
/*
If we aren't redirecting, send output to real stderr,
since stuff in sb_err won't get printed until the
command finishes.
*/
fwprintf( stderr,
FG_MSG,
j->job_id,
j->command );
}
wchar_t *ft = tok_first( j->command );
if( ft != 0 )
env_set( L"_", ft, ENV_EXPORT );
free(ft);
reader_write_title();
make_first( j );
j->fg=1;
job_continue( j, job_is_stopped(j) );
}
return j != 0;
}
/**
Helper function for builtin_bg()
*/
static int send_to_bg( job_t *j, const wchar_t *name )
{
if( j == 0 )
{
sb_printf( sb_err,
_( L"%ls: Unknown job '%ls'\n" ),
L"bg",
name );
builtin_print_help( L"bg", sb_err );
return 1;
}
else if( !j->job_control )
{
sb_printf( sb_err,
_( L"%ls: Can't put job %d, '%ls' to background because it is not under job control\n" ),
L"bg",
j->job_id,
j->command );
builtin_print_help( L"bg", sb_err );
return 1;
}
else
{
sb_printf( sb_err,
_(L"Send job %d '%ls' to background\n"),
j->job_id,
j->command );
}
make_first( j );
j->fg=0;
job_continue( j, job_is_stopped(j) );
return 0;
}
/**
Builtin for putting a job in the background
*/
static int builtin_bg( wchar_t **argv )
{
int res = 0;
if( argv[1] == 0 )
{
job_t *j;
for( j=first_job; j; j=j->next )
{
if( job_is_stopped(j) && j->job_control && (!job_is_completed(j)) )
break;
}
if( !j )
{
sb_printf( sb_err,
_( L"%ls: There are no suitable jobs\n" ),
argv[0] );
res = 1;
}
else
{
res = send_to_bg( j, _(L"(default)" ) );
}
}
else
{
for( argv++; !res && *argv != 0; argv++ )
{
int pid = wcstol( *argv, 0, 10 );
res |= send_to_bg( job_get_from_pid( pid ), *argv);
}
}
return res;
}
#ifdef HAVE__PROC_SELF_STAT
/**
Calculates the cpu usage (in percent) of the specified job.
*/
static int cpu_use( job_t *j )
{
double u=0;
process_t *p;
for( p=j->first_process; p; p=p->next )
{
struct timeval t;
int jiffies;
gettimeofday( &t, 0 );
jiffies = proc_get_jiffies( p );
double t1 = 1000000.0*p->last_time.tv_sec+p->last_time.tv_usec;
double t2 = 1000000.0*t.tv_sec+t.tv_usec;
/* fwprintf( stderr, L"t1 %f t2 %f p1 %d p2 %d\n",
t1, t2, jiffies, p->last_jiffies );
*/
u += ((double)(jiffies-p->last_jiffies))/(t2-t1);
}
return u*1000000;
}
#endif
/**
Print information about the specified job
*/
static void builtin_jobs_print( job_t *j, int mode, int header )
{
process_t *p;
switch( mode )
{
case JOBS_DEFAULT:
{
if( header )
{
/*
Print table header before first job
*/
sb_append( sb_out, _( L"Job\tGroup\t" ));
#ifdef HAVE__PROC_SELF_STAT
sb_append( sb_out, _( L"CPU\t" ) );
#endif
sb_append( sb_out, _( L"State\tCommand\n" ) );
}
sb_printf( sb_out, L"%d\t%d\t", j->job_id, j->pgid );
#ifdef HAVE__PROC_SELF_STAT
sb_printf( sb_out, L"%d%%\t", cpu_use(j) );
#endif
sb_append2( sb_out,
job_is_stopped(j)?_(L"stopped"):_(L"running"),
L"\t",
j->command,
L"\n",
(void *)0 );
break;
}
case JOBS_PRINT_GROUP:
{
if( header )
{
/*
Print table header before first job
*/
sb_append( sb_out, _( L"Group\n" ));
}
sb_printf( sb_out, L"%d\n", j->pgid );
break;
}
case JOBS_PRINT_PID:
{
if( header )
{
/*
Print table header before first job
*/
sb_append( sb_out, _( L"Procces\n" ));
}
for( p=j->first_process; p; p=p->next )
{
sb_printf( sb_out, L"%d\n", p->pid );
}
break;
}
case JOBS_PRINT_COMMAND:
{
if( header )
{
/*
Print table header before first job
*/
sb_append( sb_out, _( L"Command\n" ));
}
for( p=j->first_process; p; p=p->next )
{
sb_printf( sb_out, L"%ls\n", p->argv[0] );
}
break;
}
}
}
/**
Builtin for printing running jobs
*/
static int builtin_jobs( wchar_t **argv )
{
int argc=0;
int found=0;
int mode=JOBS_DEFAULT;
int print_last = 0;
job_t *j;
argc = builtin_count_args( argv );
woptind=0;
while( 1 )
{
const static struct woption
long_options[] =
{
{
L"pid", no_argument, 0, 'p'
}
,
{
L"command", no_argument, 0, 'c'
}
,
{
L"group", no_argument, 0, 'g'
}
,
{
L"last", no_argument, 0, 'l'
}
,
{
0, 0, 0, 0
}
}
;
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"pclg",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
sb_append( sb_err,
parser_current_line() );
// builtin_print_help( argv[0], sb_err );
return 1;
case 'p':
mode=JOBS_PRINT_PID;
break;
case 'c':
mode=JOBS_PRINT_COMMAND;
break;
case 'g':
mode=JOBS_PRINT_GROUP;
break;
case 'l':
{
print_last = 1;
break;
}
case '?':
// builtin_print_help( argv[0], sb_err );
return 1;
}
}
/*
Do not babble if not interactive
*/
if( builtin_out_redirect )
{
found=1;
}
if( print_last )
{
/*
Ignore unconstructed jobs, i.e. ourself.
*/
for( j=first_job; j; j=j->next )
{
if( j->constructed )
{
builtin_jobs_print( j, mode, !found );
return 0;
}
}
}
else
{
if( woptind < argc )
{
int i;
found = 1;
for( i=woptind; i<argc; i++ )
{
long pid;
wchar_t *end;
errno=0;
pid=wcstol( argv[i], &end, 10 );
if( errno || *end )
{
sb_printf( sb_err,
_( L"%ls: '%ls' is not a job\n" ),
argv[0],
argv[i] );
return 1;
}
j = job_get_from_pid( pid );
if( j )
{
builtin_jobs_print( j, mode, !found );
}
else
{
sb_printf( sb_err,
_( L"%ls: No suitable job: %d\n" ),
argv[0],
pid );
return 1;
}
}
}
else
{
for( j= first_job; j; j=j->next )
{
/*
Ignore unconstructed jobs, i.e. ourself.
*/
if( j->constructed /*&& j->skip_notification*/ )
{
builtin_jobs_print( j, mode, !found );
found = 1;
}
}
}
}
if( !found )
{
sb_printf( sb_out,
_( L"%ls: There are no jobs\n" ),
argv[0] );
}
return 0;
}
/**
Builtin for looping over a list
*/
static int builtin_for( wchar_t **argv )
{
int argc = builtin_count_args( argv );
int res=1;
if( argc < 3)
{
sb_printf( sb_err,
_( L"%ls: Expected at least two arguments\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
}
else if ( !wcsvarname(argv[1]) )
{
sb_printf( sb_err,
_( L"%ls: '%ls' is not a valid variable name\n" ),
argv[0],
argv[1] );
builtin_print_help( argv[0], sb_err );
}
else if (wcscmp( argv[2], L"in") != 0 )
{
sb_printf( sb_err,
_( L"%ls: Second argument must be 'in'\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
}
else
{
res=0;
}
if( res )
{
parser_push_block( FAKE );
}
else
{
parser_push_block( FOR );
al_init( &current_block->param2.for_vars);
int i;
current_block->tok_pos = parser_get_pos();
current_block->param1.for_variable = wcsdup( argv[1] );
for( i=argc-1; i>3; i-- )
{
al_push( &current_block->param2.for_vars, wcsdup(argv[ i ] ));
}
if( argc > 3 )
{
env_set( current_block->param1.for_variable, argv[3], ENV_LOCAL );
}
else
{
current_block->skip=1;
}
}
return res;
}
/**
The begin builtin. Creates a nex block.
*/
static int builtin_begin( wchar_t **argv )
{
parser_push_block( BEGIN );
current_block->tok_pos = parser_get_pos();
return 0;
}
/**
Builtin for ending a block of code, such as a for-loop or an if statement.
The end command is whare a lot of the block-level magic happens.
*/
static int builtin_end( wchar_t **argv )
{
if( !current_block->outer )
{
sb_printf( sb_err,
_( L"%ls: Not inside of block\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
else
{
/**
By default, 'end' kills the current block scope. But if we
are rewinding a loop, this should be set to false, so that
variables in the current loop scope won't die between laps.
*/
int kill_block = 1;
switch( current_block->type )
{
case WHILE:
{
/*
If this is a while loop, we rewind the loop unless
it's the last lap, in which case we continue.
*/
if( !( current_block->skip && (current_block->loop_status != LOOP_CONTINUE )))
{
current_block->loop_status = LOOP_NORMAL;
current_block->skip = 0;
kill_block = 0;
parser_set_pos( current_block->tok_pos);
current_block->param1.while_state = WHILE_TEST_AGAIN;
}
break;
}
case IF:
case SUBST:
case BEGIN:
/*
Nothing special happens at the end of these. The scope just ends.
*/
break;
case FOR:
{
/*
set loop variable to next element, and rewind to the beginning of the block.
*/
if( current_block->loop_status == LOOP_BREAK )
{
while( al_get_count( &current_block->param2.for_vars ) )
{
free( (void *)al_pop( &current_block->param2.for_vars ) );
}
}
if( al_get_count( &current_block->param2.for_vars ) )
{
wchar_t *val = (wchar_t *)al_pop( &current_block->param2.for_vars );
env_set( current_block->param1.for_variable, val, ENV_LOCAL);
current_block->loop_status = LOOP_NORMAL;
current_block->skip = 0;
free(val);
kill_block = 0;
parser_set_pos( current_block->tok_pos );
/*
fwprintf( stderr,
L"jump to %d\n",
current_block->tok_pos ); */
}
break;
}
case FUNCTION_DEF:
{
/**
Copy the text from the beginning of the function
until the end command and use as the new definition
for the specified function
*/
wchar_t *def = wcsndup( parser_get_buffer()+current_block->tok_pos,
parser_get_job_pos()-current_block->tok_pos );
//fwprintf( stderr, L"Function: %ls\n", def );
if( !is_interactive || !parser_test( def, 1 ) )
{
function_add( current_block->param1.function_name,
def,
current_block->param2.function_description,
current_block->param4.function_events,
current_block->param3.function_is_binding );
}
free(def);
}
break;
}
if( kill_block )
{
parser_pop_block();
}
/*
If everything goes ok, return status of last command to execute.
*/
return proc_get_last_status();
}
}
/**
Builtin for executing commands if an if statement is false
*/
static int builtin_else( wchar_t **argv )
{
if( current_block == 0 ||
current_block->type != IF ||
current_block->param1.if_state != 1)
{
sb_printf( sb_err,
_( L"%ls: Not inside of 'if' block\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
else
{
current_block->param1.if_state++;
current_block->skip = !current_block->skip;
env_pop();
env_push(0);
}
/*
If everything goes ok, return status of last command to execute.
*/
return proc_get_last_status();
}
/**
This function handles both the 'continue' and the 'break' builtins
that are used for loop control.
*/
static int builtin_break_continue( wchar_t **argv )
{
int is_break = (wcscmp(argv[0],L"break")==0);
int argc = builtin_count_args( argv );
block_t *b = current_block;
if( argc != 1 )
{
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
argv[1] );
builtin_print_help( argv[0], sb_err );
return 1;
}
while( (b != 0) &&
( b->type != WHILE) &&
(b->type != FOR ) )
{
b = b->outer;
}
if( b == 0 )
{
sb_printf( sb_err,
_( L"%ls: Not inside of loop\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
b = current_block;
while( ( b->type != WHILE) &&
(b->type != FOR ) )
{
b->skip=1;
b = b->outer;
}
b->skip=1;
b->loop_status = is_break?LOOP_BREAK:LOOP_CONTINUE;
return 0;
}
/**
Function for handling the \c return builtin
*/
static int builtin_return( wchar_t **argv )
{
int argc = builtin_count_args( argv );
int status = 0;
block_t *b = current_block;
switch( argc )
{
case 1:
break;
case 2:
{
wchar_t *end;
errno = 0;
status = wcstol(argv[1],&end,10);
if( errno || *end != 0)
{
sb_printf( sb_err,
_( L"%ls: Argument '%ls' must be an integer\n" ),
argv[0],
argv[1] );
builtin_print_help( argv[0], sb_err );
return 1;
}
// fwprintf( stderr, L"Return with status %d\n", status );
break;
}
default:
sb_printf( sb_err,
_( L"%ls: Too many arguments\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
while( (b != 0) &&
( b->type != FUNCTION_CALL) )
{
b = b->outer;
}
if( b == 0 )
{
sb_printf( sb_err,
_( L"%ls: Not inside of function\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
b = current_block;
while( ( b->type != FUNCTION_CALL))
{
b->skip=1;
b = b->outer;
}
b->skip=1;
// proc_set_last_status( status );
return status;
}
/**
Builtin for executing one of several blocks of commands depending on the value of an argument.
*/
static int builtin_switch( wchar_t **argv )
{
int res=0;
int argc = builtin_count_args( argv );
if( argc != 2 )
{
sb_printf( sb_err,
_( L"%ls: Expected exactly one argument, got %d\n" ),
argv[0],
argc-1 );
builtin_print_help( argv[0], sb_err );
res=1;
parser_push_block( FAKE );
}
else
{
parser_push_block( SWITCH );
current_block->param1.switch_value = wcsdup( argv[1]);
current_block->skip=1;
current_block->param2.switch_taken=0;
}
return res;
}
/**
Builtin used together with the switch builtin for conditional execution
*/
static int builtin_case( wchar_t **argv )
{
int argc = builtin_count_args( argv );
int i;
wchar_t *unescaped=0;
if( current_block->type != SWITCH )
{
sb_printf( sb_err,
_( L"%ls: 'case' command while not in switch block\n" ),
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
current_block->skip = 1;
if( current_block->param2.switch_taken )
{
return 0;
}
for( i=1; i<argc; i++ )
{
free( unescaped );
unescaped = expand_unescape( argv[i], 1);
if( wildcard_match( current_block->param1.switch_value, unescaped ) )
{
current_block->skip = 0;
current_block->param2.switch_taken = 1;
break;
}
}
free( unescaped );
return 0;
}
/*
END OF BUILTIN COMMANDS
Below are functions for handling the builtin commands
*/
void builtin_init()
{
al_init( &io_stack );
hash_init( &builtin, &hash_wcs_func, &hash_wcs_cmp );
hash_put( &builtin, L"exit", (void*) &builtin_exit );
hash_put( &builtin, L"block", (void*) &builtin_block );
hash_put( &builtin, L"builtin", (void*) &builtin_builtin );
hash_put( &builtin, L"cd", (void*) &builtin_cd );
hash_put( &builtin, L"function", (void*) &builtin_function );
hash_put( &builtin, L"functions", (void*) &builtin_functions );
hash_put( &builtin, L"complete", (void*) &builtin_complete );
hash_put( &builtin, L"end", (void*) &builtin_end );
hash_put( &builtin, L"else", (void*) &builtin_else );
hash_put( &builtin, L"eval", (void*) &builtin_eval );
hash_put( &builtin, L"for", (void*) &builtin_for );
hash_put( &builtin, L".", (void*) &builtin_source );
hash_put( &builtin, L"set", (void*) &builtin_set );
hash_put( &builtin, L"fg", (void*) &builtin_fg );
hash_put( &builtin, L"bg", (void*) &builtin_bg );
hash_put( &builtin, L"jobs", (void*) &builtin_jobs );
hash_put( &builtin, L"read", (void*) &builtin_read );
hash_put( &builtin, L"break", (void*) &builtin_break_continue );
hash_put( &builtin, L"continue", (void*) &builtin_break_continue );
hash_put( &builtin, L"return", (void*) &builtin_return );
hash_put( &builtin, L"commandline", (void*) &builtin_commandline );
hash_put( &builtin, L"switch", (void*) &builtin_switch );
hash_put( &builtin, L"case", (void*) &builtin_case );
hash_put( &builtin, L"bind", (void*) &builtin_bind );
hash_put( &builtin, L"random", (void*) &builtin_random );
hash_put( &builtin, L"status", (void*) &builtin_status );
hash_put( &builtin, L"ulimit", (void*) &builtin_ulimit );
/*
Builtins that are handled directly by the parser. They are
bound to a noop function only so that they show up in the
listings of builtin commands, etc..
*/
hash_put( &builtin, L"command", (void*) &builtin_ignore );
hash_put( &builtin, L"if", (void*) &builtin_ignore );
hash_put( &builtin, L"while", (void*) &builtin_ignore );
hash_put( &builtin, L"not", (void*) &builtin_generic );
hash_put( &builtin, L"and", (void*) &builtin_generic );
hash_put( &builtin, L"or", (void*) &builtin_generic );
hash_put( &builtin, L"exec", (void*) &builtin_exec );
hash_put( &builtin, L"begin", (void*) &builtin_begin );
/*
This is not a builtin, but fish handles it's help display
internally, to do some ugly special casing to make sure 'count
-h', but 'count (echo -h)' does not.
*/
hash_put( &builtin, L"count", (void*) &builtin_ignore );
intern_static( L"exit" );
intern_static( L"builtin" );
intern_static( L"block" );
intern_static( L"cd" );
intern_static( L"function" );
intern_static( L"functions" );
intern_static( L"complete" );
intern_static( L"end" );
intern_static( L"else" );
intern_static( L"eval" );
intern_static( L"for" );
intern_static( L"." );
intern_static( L"set" );
intern_static( L"fg" );
intern_static( L"bg" );
intern_static( L"jobs" );
intern_static( L"read" );
intern_static( L"break" );
intern_static( L"continue" );
intern_static( L"return" );
intern_static( L"commandline" );
intern_static( L"switch" );
intern_static( L"case" );
intern_static( L"bind" );
intern_static( L"random" );
intern_static( L"command" );
intern_static( L"if" );
intern_static( L"while" );
intern_static( L"exec" );
intern_static( L"count" );
intern_static( L"not" );
intern_static( L"and" );
intern_static( L"or" );
intern_static( L"begin" );
intern_static( L"status" );
intern_static( L"ulimit" );
builtin_help_init();
}
void builtin_destroy()
{
if( desc )
{
hash_destroy( desc );
free( desc );
}
al_destroy( &io_stack );
hash_destroy( &builtin );
builtin_help_destroy();
}
int builtin_exists( wchar_t *cmd )
{
/*
Count is not a builtin, but it's help is handled internally by
fish, so it is in the hash_table_t.
*/
if( wcscmp( cmd, L"count" )==0)
return 0;
return (hash_get(&builtin, cmd) != 0 );
}
/**
Return true if the specified builtin should handle it's own help,
false otherwise.
*/
static int internal_help( wchar_t *cmd )
{
if( wcscmp( cmd, L"for" ) == 0 ||
wcscmp( cmd, L"while" ) == 0 ||
wcscmp( cmd, L"function" ) == 0 ||
wcscmp( cmd, L"if" ) == 0 ||
wcscmp( cmd, L"end" ) == 0 ||
wcscmp( cmd, L"switch" ) == 0 )
return 1;
return 0;
}
int builtin_run( wchar_t **argv )
{
int (*cmd)(wchar_t **argv)=0;
cmd = hash_get( &builtin, argv[0] );
if( argv[1] != 0 && !internal_help(argv[0]) )
{
if( argv[2] == 0 && (parser_is_help( argv[1], 0 ) ) )
{
builtin_print_help( argv[0], sb_out );
return 0;
}
}
if( cmd != 0 )
{
int status;
status = cmd(argv);
// fwprintf( stderr, L"Builtin: Set status of %ls to %d\n", argv[0], status );
return status;
}
else
{
debug( 0, _( L"Unknown builtin '%ls'" ), argv[0] );
}
return 1;
}
void builtin_get_names( array_list_t *list )
{
hash_get_keys( &builtin, list );
}
const wchar_t *builtin_get_desc( const wchar_t *b )
{
if( !desc )
{
desc = malloc( sizeof( hash_table_t ) );
if( !desc)
return 0;
hash_init( desc, &hash_wcs_func, &hash_wcs_cmp );
hash_put( desc, L"block", N_( L"Temporarily block delivery of events" ) );
hash_put( desc, L"builtin", N_( L"Run a builtin command instead of a function" ) );
hash_put( desc, L"complete", N_( L"Edit command specific completions" ) );
hash_put( desc, L"cd", N_( L"Change working directory" ) );
hash_put( desc, L"exit", N_( L"Exit the shell" ) );
hash_put( desc, L"function", N_( L"Define a new function" ) );
hash_put( desc, L"functions", N_( L"List or remove functions" ) );
hash_put( desc, L"end", N_( L"End a block of commands" ) );
hash_put( desc, L"else", N_( L"Evaluate block if condition is false" ) );
hash_put( desc, L"eval", N_( L"Evaluate parameters as a command" ) );
hash_put( desc, L"for", N_( L"Perform a set of commands multiple times" ) );
hash_put( desc, L".", N_( L"Evaluate contents of file" ) );
hash_put( desc, L"set", N_( L"Handle environment variables" ) );
hash_put( desc, L"fg", N_( L"Send job to foreground" ) );
hash_put( desc, L"bg", N_( L"Send job to background" ) );
hash_put( desc, L"jobs", N_( L"Print currently running jobs" ) );
hash_put( desc, L"read", N_( L"Read a line of input into variables" ) );
hash_put( desc, L"break", N_( L"Stop the innermost loop" ) );
hash_put( desc, L"continue", N_( L"Skip the rest of the current lap of the innermost loop" ) );
hash_put( desc, L"return", N_( L"Stop the currently evaluated function" ) );
hash_put( desc, L"commandline", N_( L"Set or get the commandline" ) );
hash_put( desc, L"switch", N_( L"Conditionally execute a block of commands" ) );
hash_put( desc, L"case", N_( L"Conditionally execute a block of commands" ) );
hash_put( desc, L"command", N_( L"Run a program instead of a function or builtin" ) );
hash_put( desc, L"if", N_( L"Evaluate block if condition is true" ) );
hash_put( desc, L"while", N_( L"Perform a command multiple times" ) );
hash_put( desc, L"bind", N_( L"Handle fish key bindings" ));
hash_put( desc, L"random", N_( L"Generate random number" ));
hash_put( desc, L"exec", N_( L"Run command in current process" ));
hash_put( desc, L"not", N_( L"Negate exit status of job" ));
hash_put( desc, L"or", N_( L"Execute command if previous command failed" ));
hash_put( desc, L"and", N_( L"Execute command if previous command suceeded" ));
hash_put( desc, L"begin", N_( L"Create a block of code" ) );
hash_put( desc, L"status", N_( L"Return status information about fish" ) );
hash_put( desc, L"ulimit", N_( L"Set or get the shells resource usage limits" ) );
}
return _( hash_get( desc, b ));
}
void builtin_push_io( int in)
{
if( builtin_stdin != -1 )
{
al_push( &io_stack, (void *)(long)builtin_stdin );
al_push( &io_stack, sb_out );
al_push( &io_stack, sb_err );
}
builtin_stdin = in;
sb_out = malloc(sizeof(string_buffer_t));
sb_err = malloc(sizeof(string_buffer_t));
sb_init( sb_out );
sb_init( sb_err );
}
void builtin_pop_io()
{
builtin_stdin = 0;
sb_destroy( sb_out );
sb_destroy( sb_err );
free( sb_out);
free(sb_err);
if( al_get_count( &io_stack ) >0 )
{
sb_err = (string_buffer_t *)al_pop( &io_stack );
sb_out = (string_buffer_t *)al_pop( &io_stack );
builtin_stdin = (int)(long)al_pop( &io_stack );
}
else
{
sb_out = sb_err = 0;
builtin_stdin = 0;
}
}
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