void
Xwrite(void)
{
char *file;
int f;
switch(count(runq->argv->words)){
default:
Xerror1("> requires singleton\n");
return;
case 0:
Xerror1("> requires file\n");
return;
case 1:
break;
}
file = runq->argv->words->word;
if((f = Creat(file))<0){
pfmt(err, "%s: ", file);
Xerror("can't open");
return;
}
pushredir(ROPEN, f, runq->code[runq->pc].i);
runq->pc++;
poplist();
}
void
Xsimple(void)
{
word *a;
thread *p = runq;
var *v;
struct builtin *bp;
int pid;
globlist();
a = runq->argv->words;
if(a==0){
Xerror1("empty argument list");
return;
}
if(flag['x'])
pfmt(err, "%v\n", p->argv->words); /* wrong, should do redirs */
v = gvlook(a->word);
if(v->fn)
execfunc(v);
else{
if(strcmp(a->word, "builtin")==0){
if(count(a)==1){
pfmt(err, "builtin: empty argument list\n");
setstatus("empty arg list");
poplist();
return;
}
a = a->next;
popword();
}
for(bp = Builtin;bp->name;bp++)
if(strcmp(a->word, bp->name)==0){
(*bp->fnc)();
return;
}
if(exitnext()){
/* fork and wait is redundant */
pushword("exec");
execexec();
Xexit();
}
else{
flush(err);
Updenv(); /* necessary so changes don't go out again */
if((pid = execforkexec()) < 0){
Xerror("try again");
return;
}
/* interrupts don't get us out */
poplist();
while(Waitfor(pid, 1) < 0)
;
}
}
}
void
execdot(void)
{
int iflag = 0;
int fd;
list *av;
thread *p = runq;
char *zero;
static int first = 1;
char file[512];
word *path;
if(first){
dotcmds[0].i = 1;
dotcmds[1].f = Xmark;
dotcmds[2].f = Xword;
dotcmds[3].s="0";
dotcmds[4].f = Xlocal;
dotcmds[5].f = Xmark;
dotcmds[6].f = Xword;
dotcmds[7].s="*";
dotcmds[8].f = Xlocal;
dotcmds[9].f = Xrdcmds;
dotcmds[10].f = Xunlocal;
dotcmds[11].f = Xunlocal;
dotcmds[12].f = Xreturn;
first = 0;
}
else
eflagok = 1;
popword();
if(p->argv->words && strcmp(p->argv->words->word, "-i")==0){
iflag = 1;
popword();
}
/* get input file */
if(p->argv->words==0){
Xerror1("Usage: . [-i] file [arg ...]");
return;
}
zero = strdup(p->argv->words->word);
popword();
fd=-1;
for(path = searchpath(zero);path;path = path->next){
strcpy(file, path->word);
if(file[0])
strcat(file, "/");
strcat(file, zero);
if((fd = open(file, 0))>=0) break;
if(strcmp(file, "/dev/stdin")==0){ /* for sun & ucb */
fd = Dup1(0);
if(fd>=0)
break;
}
}
if(fd<0){
pfmt(err, "%s: ", zero);
setstatus("can't open");
Xerror(".: can't open");
return;
}
/* set up for a new command loop */
start(dotcmds, 1, (struct var *)0);
pushredir(RCLOSE, fd, 0);
runq->cmdfile = zero;
runq->cmdfd = openfd(fd);
runq->iflag = iflag;
runq->iflast = 0;
/* push $* value */
pushlist();
runq->argv->words = p->argv->words;
/* free caller's copy of $* */
av = p->argv;
p->argv = av->next;
efree((char *)av);
/* push $0 value */
pushlist();
pushword(zero);
ndot++;
}
