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/*
* Copyright 1993, 1995 Christopher Seiwald.
* Copyright 2007 Noel Belcourt.
*
* Utility functions shared between different exec*.c platform specific
* implementation modules.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
#include "jam.h"
#include "execcmd.h"
#include <assert.h>
#include <stdio.h>
#include <string.h>
/* Internal interrupt counter. */
static int intr;
/* Constructs a list of command-line elements using the format specified by the
* given shell list.
*
* Given argv array should have at least MAXARGC + 1 elements.
* Slot numbers may be between 0 and 998 (inclusive).
*
* Constructed argv list will be zero terminated. Character arrays referenced by
* the argv structure elements will be either elements from the give shell list,
* internal static buffers or the given command string and should thus not
* considered owned by or released via the argv structure and should be
* considered invalidated by the next argv_from_shell() call.
*
* Shell list elements:
* - Starting with '%' - represent the command string.
* - Starting with '!' - represent the slot number (increased by one).
* - Anything else - used as a literal.
* - If no '%' element is found, the command string is appended as an extra.
*/
void argv_from_shell( char const * * argv, LIST * shell, char const * command,
int const slot )
{
static char jobno[ 4 ];
int i;
int gotpercent = 0;
LISTITER iter = list_begin( shell );
LISTITER end = list_end( shell );
assert( 0 <= slot );
assert( slot < 999 );
sprintf( jobno, "%d", slot + 1 );
for ( i = 0; iter != end && i < MAXARGC; ++i, iter = list_next( iter ) )
{
switch ( object_str( list_item( iter ) )[ 0 ] )
{
case '%': argv[ i ] = command; ++gotpercent; break;
case '!': argv[ i ] = jobno; break;
default : argv[ i ] = object_str( list_item( iter ) );
}
}
if ( !gotpercent )
argv[ i++ ] = command;
argv[ i ] = NULL;
}
/* Returns whether the given command string contains lines longer than the given
* maximum.
*/
int check_cmd_for_too_long_lines( char const * command, int const max,
int * const error_length, int * const error_max_length )
{
while ( *command )
{
size_t const l = strcspn( command, "\n" );
if ( l > max )
{
*error_length = l;
*error_max_length = max;
return EXEC_CHECK_LINE_TOO_LONG;
}
command += l;
if ( *command )
++command;
}
return EXEC_CHECK_OK;
}
/* Checks whether the given shell list is actually a request to execute raw
* commands without an external shell.
*/
int is_raw_command_request( LIST * shell )
{
return !list_empty( shell ) &&
!strcmp( object_str( list_front( shell ) ), "%" ) &&
list_next( list_begin( shell ) ) == list_end( shell );
}
/* Returns whether an interrupt has been detected so far. */
int interrupted( void )
{
return intr != 0;
}
/* Internal interrupt handler. */
void onintr( int disp )
{
++intr;
printf( "...interrupted\n" );
}
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