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#include <common.h>
/**
** User function Q: exit, write, bogus
**
** Reports itself, then tries to execute a bogus system call
**
** Invoked as: userQ x
** where x is the ID character
*/
USERMAIN( main ) {
char ch = 'q'; // default character to print
char buf[128];
// process the command-line arguments
switch( argc ) {
case 2: ch = argv[1][0];
break;
default:
sprint( buf, "userQ: argc %d, args: ", argc );
cwrites( buf );
for( int i = 0; i <= argc; ++i ) {
sprint( buf, " %s", argv[argc] ? argv[argc] : "(null)" );
cwrites( buf );
}
cwrites( "\n" );
}
// announce our presence
write( CHAN_SIO, &ch, 1 );
// try something weird
bogus();
// should not have come back here!
sprint( buf, "!!!!! %c returned from bogus syscall!?!?!\n", ch );
cwrites( buf );
exit( 1 );
return( 42 ); // shut the compiler up!
}
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