forked from ashinn/chibi-scheme
/
plan9.c
353 lines (314 loc) · 12.3 KB
/
plan9.c
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/* plan9.c -- extended Plan 9 system utils */
/* Copyright (c) 2009-2015 Alex Shinn. All rights reserved. */
/* BSD-style license: http://synthcode.com/license.txt */
#include "chibi/eval.h"
sexp sexp_rand (sexp ctx, sexp self, sexp_sint_t n) {
return sexp_make_fixnum(rand());
}
sexp sexp_srand (sexp ctx, sexp self, sexp_sint_t n, sexp seed) {
srand(sexp_unbox_fixnum(seed));
return SEXP_VOID;
}
sexp sexp_file_exists_p (sexp ctx, sexp self, sexp_sint_t n, sexp path) {
int res;
uchar statbuf[STATMAX];
if (! sexp_stringp(path))
return sexp_type_exception(ctx, self, SEXP_STRING, path);
res = stat(sexp_string_data(path), statbuf, sizeof(statbuf));
return (res < 0) ? SEXP_FALSE : SEXP_TRUE;
}
sexp sexp_fdopen (sexp ctx, sexp self, sexp_sint_t n, sexp fd, sexp mode) {
FILE *f;
if (! sexp_integerp(fd))
return sexp_type_exception(ctx, self, SEXP_FIXNUM, fd);
if (! sexp_stringp(mode))
return sexp_type_exception(ctx, self, SEXP_STRING, mode);
f = fdopen(sexp_unbox_fixnum(fd), sexp_string_data(mode));
if (! f)
return sexp_user_exception(ctx, SEXP_FALSE, "fdopen failed", fd);
/* maybe use fd2path to get the name of the fd */
if (sexp_string_data(mode)[0] == 'w')
return sexp_make_output_port(ctx, f, SEXP_FALSE);
else
return sexp_make_input_port(ctx, f, SEXP_FALSE);
}
sexp sexp_fileno (sexp ctx, sexp self, sexp_sint_t n, sexp port) {
if (! sexp_portp(port))
return sexp_type_exception(ctx, self, SEXP_IPORT, port);
return sexp_make_fixnum(fileno(sexp_port_stream(port)));
}
sexp sexp_fork (sexp ctx, sexp self, sexp_sint_t n) {
return sexp_make_fixnum(fork());
}
sexp sexp_exec (sexp ctx, sexp self, sexp_sint_t n, sexp name, sexp args) {
int i, len = sexp_unbox_fixnum(sexp_length(ctx, args));
char **argv = malloc((len+1)*sizeof(char*));
for (i=0; i<len; i++, args=sexp_cdr(args))
argv[i] = sexp_string_data(sexp_car(args));
argv[len] = NULL;
exec(sexp_string_data(name), argv);
return SEXP_VOID; /* won't really return */
}
void sexp_exits (sexp ctx, sexp self, sexp_sint_t n, sexp msg) {
exits(sexp_string_data(sexp_stringp(msg)
? msg : sexp_write_to_string(ctx, msg)));
}
sexp sexp_dup (sexp ctx, sexp self, sexp_sint_t n, sexp oldfd, sexp newfd) {
return sexp_make_fixnum(dup(sexp_unbox_fixnum(oldfd),
sexp_unbox_fixnum(newfd)));
}
sexp sexp_pipe (sexp ctx, sexp self, sexp_sint_t n) {
int fds[2];
pipe(fds);
return sexp_list2(ctx, sexp_make_fixnum(fds[0]), sexp_make_fixnum(fds[1]));
}
sexp sexp_sleep (sexp ctx, sexp self, sexp_sint_t n, sexp msecs) {
if (! sexp_integerp(msecs))
return sexp_type_exception(ctx, self, SEXP_FIXNUM, msecs);
sleep(sexp_unbox_fixnum(msecs));
return SEXP_VOID;
}
sexp sexp_getenv (sexp ctx, sexp self, sexp_sint_t n, sexp name) {
char *value;
if (! sexp_stringp(name))
return sexp_type_exception(ctx, self, SEXP_STRING, name);
value = getenv(sexp_string_data(name));
return ((! value) ? SEXP_FALSE : sexp_c_string(ctx, value, -1));
}
sexp sexp_getwd (sexp ctx, sexp self, sexp_sint_t n) {
char buf[512];
getwd(buf, 512);
return sexp_c_string(ctx, buf, -1);
}
sexp sexp_chdir (sexp ctx, sexp self, sexp_sint_t n, sexp path) {
if (! sexp_stringp(path))
return sexp_type_exception(ctx, self, SEXP_STRING, path);
chdir(sexp_string_data(path));
return SEXP_VOID;
}
sexp sexp_getuser (sexp ctx, sexp self, sexp_sint_t n) {
return sexp_c_string(ctx, getuser(), -1);
}
sexp sexp_sysname (sexp ctx, sexp self, sexp_sint_t n) {
return sexp_c_string(ctx, sysname(), -1);
}
sexp sexp_wait (sexp ctx, sexp self, sexp_sint_t n) { /* just return (pid msg) */
Waitmsg *wmsg;
sexp res;
sexp_gc_var(msg, s_msg);
sexp_gc_preserve(ctx, msg, s_msg);
wmsg = wait();
msg = sexp_c_string(ctx, wmsg->msg, -1);
res = sexp_list2(ctx, sexp_make_fixnum(wmsg->pid), msg);
sexp_gc_release(ctx, msg, s_msg);
return res;
}
sexp sexp_postnote (sexp ctx, sexp self, sexp_sint_t n, sexp pid, sexp note) {
if (! sexp_integerp(pid))
return sexp_type_exception(ctx, self, SEXP_FIXNUM, pid);
if (! sexp_stringp(note))
return sexp_type_exception(ctx, self, SEXP_STRING, note);
postnote(PNPROC, sexp_unbox_fixnum(pid), sexp_string_data(note));
return SEXP_VOID;
}
/**********************************************************************/
/* 9p interface */
typedef struct sexp_plan9_srv {
sexp context, auth, attach, walk, walk1, clone, open, create, remove,
read, write, stat, wstat, flush, destroyfid, destroyreq, end;
} *sexp_plan9_srv;
void sexp_build_srv (sexp ctx, sexp_plan9_srv s, sexp ls) {
s->context = ctx;
s->auth = s->attach = s->walk = s->walk1 = s->clone = s->open
= s->create = s->remove = s->read = s->write = s->stat = s->wstat
= s->flush = s->destroyfid = s->destroyreq = s->end = SEXP_FALSE;
for ( ; sexp_pairp(ls) && sexp_pairp(sexp_cdr(ls)); ls=sexp_cddr(ls)) {
if (sexp_car(ls) == sexp_intern(ctx, "auth:", -1)) {
s->auth = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "attach:", -1)) {
s->attach = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "walk:", -1)) {
s->walk = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "walk1:", -1)) {
s->walk1 = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "clone:", -1)) {
s->clone = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "open:", -1)) {
s->open = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "create:", -1)) {
s->create = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "remove:", -1)) {
s->remove = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "read:", -1)) {
s->read = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "write:", -1)) {
s->write = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "stat:", -1)) {
s->stat = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "wstat:", -1)) {
s->wstat = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "flush:", -1)) {
s->flush = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "destroyfid:", -1)) {
s->destroyfid = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "destroyreq:", -1)) {
s->destroyreq = sexp_cadr(ls);
} else if (sexp_car(ls) == sexp_intern(ctx, "end:", -1)) {
s->end = sexp_cadr(ls);
}
}
}
void sexp_run_9p_handler (Req *r, sexp handler) {
sexp_plan9_srv s = (sexp_plan9_srv)r->srv->aux;
sexp ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, r, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
sexp_apply(ctx, handler, args);
sexp_gc_release(ctx, ptr, s_ptr);
}
#define sexp_def_9p_handler(name, field) \
void name (Req *r) { \
sexp_run_9p_handler(r, ((sexp_plan9_srv)r->srv->aux)->field); \
}
sexp_def_9p_handler(sexp_9p_auth, auth)
sexp_def_9p_handler(sexp_9p_attach, attach)
sexp_def_9p_handler(sexp_9p_walk, walk)
sexp_def_9p_handler(sexp_9p_open, open)
sexp_def_9p_handler(sexp_9p_create, create)
sexp_def_9p_handler(sexp_9p_remove, remove)
sexp_def_9p_handler(sexp_9p_read, read)
sexp_def_9p_handler(sexp_9p_write, write)
sexp_def_9p_handler(sexp_9p_stat, stat)
sexp_def_9p_handler(sexp_9p_wstat, wstat)
sexp_def_9p_handler(sexp_9p_flush, flush)
char* sexp_9p_walk1 (Fid *fid, char *name, Qid *qid) {
sexp_plan9_srv s = (sexp_plan9_srv)fid->pool->srv->aux;
sexp res, ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, qid, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
ptr = sexp_c_string(ctx, name, -1);
args = sexp_cons(ctx, ptr, args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, fid, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, args);
res = sexp_apply(ctx, s->walk1, args);
sexp_gc_release(ctx, ptr, s_ptr);
return sexp_stringp(res) ? sexp_string_data(res) : nil;
}
char* sexp_9p_clone (Fid *oldfid, Fid *newfid) {
sexp_plan9_srv s = (sexp_plan9_srv)oldfid->pool->srv->aux;
sexp res, ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, oldfid, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, newfid, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, args);
res = sexp_apply(ctx, s->clone, args);
sexp_gc_release(ctx, ptr, s_ptr);
return sexp_stringp(res) ? sexp_string_data(res) : nil;
}
void sexp_9p_destroyfid (Fid *fid) {
sexp_plan9_srv s = (sexp_plan9_srv)fid->pool->srv->aux;
sexp ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, fid, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
sexp_apply(ctx, s->destroyfid, args);
sexp_gc_release(ctx, ptr, s_ptr);
}
void sexp_9p_destroyreq (Req *r) {
sexp_plan9_srv s = (sexp_plan9_srv)r->srv->aux;
sexp ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, r, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
sexp_apply(ctx, s->destroyreq, args);
sexp_gc_release(ctx, ptr, s_ptr);
}
void sexp_9p_end (Srv *srv) {
sexp_plan9_srv s = (sexp_plan9_srv)srv->aux;
sexp ctx = s->context;
sexp_gc_var(ptr, s_ptr);
sexp_gc_var(args, s_args);
sexp_gc_preserve(ctx, ptr, s_ptr);
sexp_gc_preserve(ctx, args, s_args);
ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, srv, SEXP_FALSE, 0);
args = sexp_cons(ctx, ptr, SEXP_NULL);
sexp_apply(ctx, s->end, args);
sexp_gc_release(ctx, ptr, s_ptr);
}
sexp sexp_postmountsrv (sexp ctx, sexp self, sexp_sint_t n, sexp ls, sexp name, sexp mtpt, sexp flags) {
Srv s;
struct sexp_plan9_srv p9s;
if (! sexp_listp(ctx, ls))
return sexp_type_exception(ctx, self, SEXP_PAIR, ls);
if (! sexp_stringp(name))
return sexp_type_exception(ctx, self, SEXP_STRING, name);
if (! sexp_stringp(mtpt))
return sexp_type_exception(ctx, self, SEXP_STRING, mtpt);
if (! sexp_integerp(flags))
return sexp_type_exception(ctx, self, SEXP_FIXNUM, flags);
sexp_build_srv(ctx, &p9s, ls);
s.aux = &p9s;
s.auth = &sexp_9p_auth;
s.attach = &sexp_9p_attach;
s.walk = &sexp_9p_walk;
s.walk1 = &sexp_9p_walk1;
s.clone = &sexp_9p_clone;
s.open = &sexp_9p_open;
s.create = &sexp_9p_create;
s.remove = &sexp_9p_remove;
s.read = &sexp_9p_read;
s.write = &sexp_9p_write;
s.stat = &sexp_9p_stat;
s.wstat = &sexp_9p_wstat;
s.flush = &sexp_9p_flush;
s.destroyfid = &sexp_9p_destroyfid;
s.destroyreq = &sexp_9p_destroyreq;
s.end = &sexp_9p_end;
postmountsrv(&s, sexp_string_data(name), sexp_string_data(mtpt),
sexp_unbox_fixnum(flags));
return SEXP_UNDEF;
}
sexp sexp_9p_req_offset (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
return sexp_make_integer(ctx, ((Req*)sexp_cpointer_value(req))->ifcall.offset);
}
sexp sexp_9p_req_count (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
return sexp_make_integer(ctx, ((Req*)sexp_cpointer_value(req))->ifcall.count);
}
#if 0
sexp sexp_9p_req_path (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
return sexp_c_string(ctx, ((Req*)sexp_cpointer_value(req))->fid->qid.path, -1);
}
#endif
sexp sexp_9p_req_fid (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
return sexp_make_cpointer(ctx, SEXP_CPOINTER, ((Req*)sexp_cpointer_value(req))->fid, SEXP_FALSE, 0);
}
sexp sexp_9p_req_newfid (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
return sexp_make_cpointer(ctx, SEXP_CPOINTER, ((Req*)sexp_cpointer_value(req))->newfid, SEXP_FALSE, 0);
}
sexp sexp_9p_respond (sexp ctx, sexp self, sexp_sint_t n, sexp req, sexp err) {
char *cerr = sexp_stringp(err) ? sexp_string_data(err) : nil;
respond(sexp_cpointer_value(req), cerr);
return SEXP_VOID;
}
sexp sexp_9p_responderror (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
responderror(sexp_cpointer_value(req));
return SEXP_VOID;
}