setup()
{
close(fsym); fsym = -1;
#ifndef VFORK
IF (pid = fork()) == 0
#else
IF (pid = vfork()) == 0
#endif
THEN ptrace(PT_TRACE_ME,0,0,0);
#ifdef VFORK
signal(SIGTRAP,nullsig);
#endif
signal(SIGINT,sigint); signal(SIGQUIT,sigqit);
doexec(); exit(0);
ELIF pid == -1
THEN error(NOFORK);
ELSE bpwait(); readregs(); lp[0]=EOR; lp[1]=0;
fsym=open(symfil,wtflag);
IF errflg
THEN printf("%s: cannot execute\n",symfil);
endpcs(); error(0);
FI
FI
bpstate=BPOUT;
}
void
done(void)
{
if (pid)
endpcs();
exits(exitflg? "error": 0);
}
void
msgpcs(char *msg)
{
char err[ERRMAX];
setpcs();
if(write(msgfd, msg, strlen(msg)) < 0 && !ending){
errstr(err, sizeof err);
if(strcmp(err, "interrupted") != 0)
endpcs();
errors("can't write control file", err);
}
}
/*
* reload the note buffer
*/
void
loadnote(void)
{
int i;
char err[ERRMAX];
setpcs();
for(i=0; i<nnote; i++){
if(write(notefd, note[i], strlen(note[i])) < 0){
errstr(err, sizeof err);
if(strcmp(err, "interrupted") != 0)
endpcs();
errors("can't write note file", err);
}
}
nnote = 0;
}
/*
* empty the note buffer and toss pending breakpoint notes
*/
void
unloadnote(void)
{
char err[ERRMAX];
setpcs();
for(; nnote<NNOTE; nnote++){
switch(read(notefd, note[nnote], sizeof note[nnote])){
case -1:
errstr(err, sizeof err);
if(strcmp(err, "interrupted") != 0)
endpcs();
errors("can't read note file", err);
case 0:
return;
}
note[nnote][ERRMAX-1] = '\0';
if(strncmp(note[nnote], "sys: breakpoint", 15) == 0)
--nnote;
}
}