#include <creator.h>
#define tp globals[fd]
#define FILE files[fd]
#define RET ret[fd]
mapping globals = ([ ]), files = ([ ]), ret = ([ ]);
/** @ignore yes */
int cmd( string arg ) {
string last, bit, *bits;
int fd, num;
if( !arg )
return notify_fail("Usage: diff <filename1> <filename2>\n");
last = "";
bits = explode( arg, " ");
arg = "";
bits -= ({""});
foreach( bit in bits ) {
string full;
mixed *st;
if( bit[0] == '-') {
last = bit;
continue;
}
bit = ( full = TP->get_path(bit) )[1..];
if( bit == "")
return notify_fail("Your wombles just expired.\n");
if( !master()->valid_read( bit, TP, 0 ) )
return notify_fail("Permission denied: "+full+".\n");
if( sizeof( st = unguarded( (: stat, bit :) ) ) ) {
if( stringp( st[0] ) )
return notify_fail("You cannot use diff on directories.\n");
} else {
return notify_fail("No such file: "+full+".\n");
}
arg += " "+last;
last = bit;
num++;
}
if( num == 2 )
arg += " "+last;
last = "/"+last;
if( num > 3 )
return notify_fail("You cannot compare more than two files.\n");
if( num == 3 && file_size(last) > 0 )
return notify_fail("File "+last+" exists.\n");
tell_creator("sandoz", "arg: %O", arg );
fd = external_start( 7, arg, "read_call_back",
"write_call_back", "close_call_back");
if( fd == -1 )
return notify_fail("Diff failed.\n");
tp = TP;
if( num == 3 && master()->valid_write( last, TP, 0 ) )
FILE = last;
RET = "";
return 1;
} /* cmd() */
void read_call_back( int fd, mixed mess ) {
mess = replace( mess, "/usr/bin/", "");
RET += mess;
} /* read_call_back() */
/** @ignore yes */
void write_call_back( int fd ) {
tell_object( tp, "Diff: Whoops! Fatal error.\n");
} /* write_call_back() */
/** @ignore yes */
void close_call_back( int fd ) {
if( FILE ) {
write_file( FILE, RET );
} else {
if( RET == "")
RET = "These two files are identical.";
tp->more_string(RET);
}
map_delete( ret, fd );
map_delete( files, fd );
map_delete( globals, fd );
} /* close_call_back() */
