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8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
353 lines
12 KiB
C
353 lines
12 KiB
C
/* plan9.c -- extended Plan 9 system utils */
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/* Copyright (c) 2009-2012 Alex Shinn. All rights reserved. */
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/* BSD-style license: http://synthcode.com/license.txt */
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#include "chibi/eval.h"
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sexp sexp_rand (sexp ctx, sexp self, sexp_sint_t n) {
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return sexp_make_fixnum(rand());
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}
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sexp sexp_srand (sexp ctx, sexp self, sexp_sint_t n, sexp seed) {
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srand(sexp_unbox_fixnum(seed));
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return SEXP_VOID;
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}
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sexp sexp_file_exists_p (sexp ctx, sexp self, sexp_sint_t n, sexp path) {
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int res;
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uchar statbuf[STATMAX];
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if (! sexp_stringp(path))
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return sexp_type_exception(ctx, self, SEXP_STRING, path);
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res = stat(sexp_string_data(path), statbuf, sizeof(statbuf));
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return (res < 0) ? SEXP_FALSE : SEXP_TRUE;
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}
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sexp sexp_fdopen (sexp ctx, sexp self, sexp_sint_t n, sexp fd, sexp mode) {
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FILE *f;
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if (! sexp_integerp(fd))
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return sexp_type_exception(ctx, self, SEXP_FIXNUM, fd);
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if (! sexp_stringp(mode))
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return sexp_type_exception(ctx, self, SEXP_STRING, mode);
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f = fdopen(sexp_unbox_fixnum(fd), sexp_string_data(mode));
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if (! f)
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return sexp_user_exception(ctx, SEXP_FALSE, "fdopen failed", fd);
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/* maybe use fd2path to get the name of the fd */
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if (sexp_string_data(mode)[0] == 'w')
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return sexp_make_output_port(ctx, f, SEXP_FALSE);
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else
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return sexp_make_input_port(ctx, f, SEXP_FALSE);
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}
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sexp sexp_fileno (sexp ctx, sexp self, sexp_sint_t n, sexp port) {
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if (! sexp_portp(port))
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return sexp_type_exception(ctx, self, SEXP_IPORT, port);
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return sexp_make_fixnum(fileno(sexp_port_stream(port)));
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}
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sexp sexp_fork (sexp ctx, sexp self, sexp_sint_t n) {
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return sexp_make_fixnum(fork());
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}
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sexp sexp_exec (sexp ctx, sexp self, sexp_sint_t n, sexp name, sexp args) {
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int i, len = sexp_unbox_fixnum(sexp_length(ctx, args));
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char **argv = malloc((len+1)*sizeof(char*));
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for (i=0; i<len; i++, args=sexp_cdr(args))
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argv[i] = sexp_string_data(sexp_car(args));
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argv[len] = NULL;
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exec(sexp_string_data(name), argv);
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return SEXP_VOID; /* won't really return */
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}
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void sexp_exits (sexp ctx, sexp self, sexp_sint_t n, sexp msg) {
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exits(sexp_string_data(sexp_stringp(msg)
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? msg : sexp_write_to_string(ctx, msg)));
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}
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sexp sexp_dup (sexp ctx, sexp self, sexp_sint_t n, sexp oldfd, sexp newfd) {
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return sexp_make_fixnum(dup(sexp_unbox_fixnum(oldfd),
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sexp_unbox_fixnum(newfd)));
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}
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sexp sexp_pipe (sexp ctx, sexp self, sexp_sint_t n) {
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int fds[2];
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pipe(fds);
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return sexp_list2(ctx, sexp_make_fixnum(fds[0]), sexp_make_fixnum(fds[1]));
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}
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sexp sexp_sleep (sexp ctx, sexp self, sexp_sint_t n, sexp msecs) {
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if (! sexp_integerp(msecs))
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return sexp_type_exception(ctx, self, SEXP_FIXNUM, msecs);
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sleep(sexp_unbox_fixnum(msecs));
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return SEXP_VOID;
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}
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sexp sexp_getenv (sexp ctx, sexp self, sexp_sint_t n, sexp name) {
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char *value;
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if (! sexp_stringp(name))
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return sexp_type_exception(ctx, self, SEXP_STRING, name);
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value = getenv(sexp_string_data(name));
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return ((! value) ? SEXP_FALSE : sexp_c_string(ctx, value, -1));
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}
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sexp sexp_getwd (sexp ctx, sexp self, sexp_sint_t n) {
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char buf[512];
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getwd(buf, 512);
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return sexp_c_string(ctx, buf, -1);
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}
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sexp sexp_chdir (sexp ctx, sexp self, sexp_sint_t n, sexp path) {
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if (! sexp_stringp(path))
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return sexp_type_exception(ctx, self, SEXP_STRING, path);
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chdir(sexp_string_data(path));
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return SEXP_VOID;
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}
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sexp sexp_getuser (sexp ctx, sexp self, sexp_sint_t n) {
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return sexp_c_string(ctx, getuser(), -1);
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}
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sexp sexp_sysname (sexp ctx, sexp self, sexp_sint_t n) {
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return sexp_c_string(ctx, sysname(), -1);
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}
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sexp sexp_wait (sexp ctx, sexp self, sexp_sint_t n) { /* just return (pid msg) */
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Waitmsg *wmsg;
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sexp res;
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sexp_gc_var(msg, s_msg);
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sexp_gc_preserve(ctx, msg, s_msg);
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wmsg = wait();
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msg = sexp_c_string(ctx, wmsg->msg, -1);
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res = sexp_list2(ctx, sexp_make_fixnum(wmsg->pid), msg);
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sexp_gc_release(ctx, msg, s_msg);
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return res;
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}
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sexp sexp_postnote (sexp ctx, sexp self, sexp_sint_t n, sexp pid, sexp note) {
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if (! sexp_integerp(pid))
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return sexp_type_exception(ctx, self, SEXP_FIXNUM, pid);
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if (! sexp_stringp(note))
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return sexp_type_exception(ctx, self, SEXP_STRING, note);
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postnote(PNPROC, sexp_unbox_fixnum(pid), sexp_string_data(note));
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return SEXP_VOID;
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}
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/**********************************************************************/
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/* 9p interface */
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typedef struct sexp_plan9_srv {
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sexp context, auth, attach, walk, walk1, clone, open, create, remove,
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read, write, stat, wstat, flush, destroyfid, destroyreq, end;
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} *sexp_plan9_srv;
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void sexp_build_srv (sexp ctx, sexp_plan9_srv s, sexp ls) {
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s->context = ctx;
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s->auth = s->attach = s->walk = s->walk1 = s->clone = s->open
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= s->create = s->remove = s->read = s->write = s->stat = s->wstat
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= s->flush = s->destroyfid = s->destroyreq = s->end = SEXP_FALSE;
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for ( ; sexp_pairp(ls) && sexp_pairp(sexp_cdr(ls)); ls=sexp_cddr(ls)) {
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if (sexp_car(ls) == sexp_intern(ctx, "auth:", -1)) {
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s->auth = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "attach:", -1)) {
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s->attach = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "walk:", -1)) {
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s->walk = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "walk1:", -1)) {
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s->walk1 = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "clone:", -1)) {
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s->clone = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "open:", -1)) {
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s->open = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "create:", -1)) {
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s->create = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "remove:", -1)) {
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s->remove = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "read:", -1)) {
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s->read = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "write:", -1)) {
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s->write = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "stat:", -1)) {
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s->stat = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "wstat:", -1)) {
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s->wstat = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "flush:", -1)) {
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s->flush = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "destroyfid:", -1)) {
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s->destroyfid = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "destroyreq:", -1)) {
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s->destroyreq = sexp_cadr(ls);
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} else if (sexp_car(ls) == sexp_intern(ctx, "end:", -1)) {
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s->end = sexp_cadr(ls);
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}
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}
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}
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void sexp_run_9p_handler (Req *r, sexp handler) {
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sexp_plan9_srv s = (sexp_plan9_srv)r->srv->aux;
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sexp ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, r, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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sexp_apply(ctx, handler, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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}
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#define sexp_def_9p_handler(name, field) \
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void name (Req *r) { \
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sexp_run_9p_handler(r, ((sexp_plan9_srv)r->srv->aux)->field); \
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}
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sexp_def_9p_handler(sexp_9p_auth, auth)
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sexp_def_9p_handler(sexp_9p_attach, attach)
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sexp_def_9p_handler(sexp_9p_walk, walk)
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sexp_def_9p_handler(sexp_9p_open, open)
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sexp_def_9p_handler(sexp_9p_create, create)
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sexp_def_9p_handler(sexp_9p_remove, remove)
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sexp_def_9p_handler(sexp_9p_read, read)
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sexp_def_9p_handler(sexp_9p_write, write)
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sexp_def_9p_handler(sexp_9p_stat, stat)
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sexp_def_9p_handler(sexp_9p_wstat, wstat)
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sexp_def_9p_handler(sexp_9p_flush, flush)
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char* sexp_9p_walk1 (Fid *fid, char *name, Qid *qid) {
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sexp_plan9_srv s = (sexp_plan9_srv)fid->pool->srv->aux;
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sexp res, ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, qid, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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ptr = sexp_c_string(ctx, name, -1);
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args = sexp_cons(ctx, ptr, args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, fid, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, args);
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res = sexp_apply(ctx, s->walk1, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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return sexp_stringp(res) ? sexp_string_data(res) : nil;
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}
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char* sexp_9p_clone (Fid *oldfid, Fid *newfid) {
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sexp_plan9_srv s = (sexp_plan9_srv)oldfid->pool->srv->aux;
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sexp res, ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, oldfid, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, newfid, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, args);
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res = sexp_apply(ctx, s->clone, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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return sexp_stringp(res) ? sexp_string_data(res) : nil;
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}
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void sexp_9p_destroyfid (Fid *fid) {
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sexp_plan9_srv s = (sexp_plan9_srv)fid->pool->srv->aux;
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sexp ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, fid, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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sexp_apply(ctx, s->destroyfid, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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}
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void sexp_9p_destroyreq (Req *r) {
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sexp_plan9_srv s = (sexp_plan9_srv)r->srv->aux;
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sexp ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, r, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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sexp_apply(ctx, s->destroyreq, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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}
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void sexp_9p_end (Srv *srv) {
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sexp_plan9_srv s = (sexp_plan9_srv)srv->aux;
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sexp ctx = s->context;
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sexp_gc_var(ptr, s_ptr);
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sexp_gc_var(args, s_args);
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sexp_gc_preserve(ctx, ptr, s_ptr);
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sexp_gc_preserve(ctx, args, s_args);
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ptr = sexp_make_cpointer(ctx, SEXP_CPOINTER, srv, SEXP_FALSE, 0);
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args = sexp_cons(ctx, ptr, SEXP_NULL);
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sexp_apply(ctx, s->end, args);
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sexp_gc_release(ctx, ptr, s_ptr);
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}
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sexp sexp_postmountsrv (sexp ctx, sexp self, sexp_sint_t n, sexp ls, sexp name, sexp mtpt, sexp flags) {
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Srv s;
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struct sexp_plan9_srv p9s;
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if (! sexp_listp(ctx, ls))
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return sexp_type_exception(ctx, self, SEXP_PAIR, ls);
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if (! sexp_stringp(name))
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return sexp_type_exception(ctx, self, SEXP_STRING, name);
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if (! sexp_stringp(mtpt))
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return sexp_type_exception(ctx, self, SEXP_STRING, mtpt);
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if (! sexp_integerp(flags))
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return sexp_type_exception(ctx, self, SEXP_FIXNUM, flags);
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sexp_build_srv(ctx, &p9s, ls);
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s.aux = &p9s;
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s.auth = &sexp_9p_auth;
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s.attach = &sexp_9p_attach;
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s.walk = &sexp_9p_walk;
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s.walk1 = &sexp_9p_walk1;
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s.clone = &sexp_9p_clone;
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s.open = &sexp_9p_open;
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s.create = &sexp_9p_create;
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s.remove = &sexp_9p_remove;
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s.read = &sexp_9p_read;
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s.write = &sexp_9p_write;
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s.stat = &sexp_9p_stat;
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s.wstat = &sexp_9p_wstat;
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s.flush = &sexp_9p_flush;
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s.destroyfid = &sexp_9p_destroyfid;
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s.destroyreq = &sexp_9p_destroyreq;
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s.end = &sexp_9p_end;
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postmountsrv(&s, sexp_string_data(name), sexp_string_data(mtpt),
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sexp_unbox_fixnum(flags));
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return SEXP_UNDEF;
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}
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sexp sexp_9p_req_offset (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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return sexp_make_integer(ctx, ((Req*)sexp_cpointer_value(req))->ifcall.offset);
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}
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sexp sexp_9p_req_count (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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return sexp_make_integer(ctx, ((Req*)sexp_cpointer_value(req))->ifcall.count);
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}
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#if 0
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sexp sexp_9p_req_path (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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return sexp_c_string(ctx, ((Req*)sexp_cpointer_value(req))->fid->qid.path, -1);
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}
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#endif
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sexp sexp_9p_req_fid (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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return sexp_make_cpointer(ctx, SEXP_CPOINTER, ((Req*)sexp_cpointer_value(req))->fid, SEXP_FALSE, 0);
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}
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sexp sexp_9p_req_newfid (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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return sexp_make_cpointer(ctx, SEXP_CPOINTER, ((Req*)sexp_cpointer_value(req))->newfid, SEXP_FALSE, 0);
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}
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sexp sexp_9p_respond (sexp ctx, sexp self, sexp_sint_t n, sexp req, sexp err) {
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char *cerr = sexp_stringp(err) ? sexp_string_data(err) : nil;
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respond(sexp_cpointer_value(req), cerr);
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return SEXP_VOID;
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}
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sexp sexp_9p_responderror (sexp ctx, sexp self, sexp_sint_t n, sexp req) {
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responderror(sexp_cpointer_value(req));
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return SEXP_VOID;
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}
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