5 files changed, 39 insertions, 111 deletions
diff --git a/src/bin/private_include/bin/proc.h b/src/bin/private_include/bin/proc.h
index cf0c04e..92f1566 100644
--- a/src/bin/private_include/bin/proc.h
+++ b/src/bin/private_include/bin/proc.h
@@ -43,6 +43,8 @@ int bin_proc_s_pop(void *dst, size_t n, void *user);
 int bin_proc_s_read(size_t offset, void *dst, size_t n, void *user);
 int bin_proc_s_write(size_t offset, const void *dst, size_t n, void *user);
 size_t bin_proc_s_ptr(void *user);
+struct bin_proc_fd *bin_proc_fd_find(const struct bin_proc *p, int fd);
+int bin_proc_fd_alloc(struct bin_proc *p, const struct fs_fd *fd, int flags);
 
 extern const struct nw_inst_cfg bin_proc_cfg;
 
diff --git a/src/bin/private_include/bin/types.h b/src/bin/private_include/bin/types.h
index 2a498ed..6f231ae 100644
--- a/src/bin/private_include/bin/types.h
+++ b/src/bin/private_include/bin/types.h
@@ -28,7 +28,7 @@
 #include <sys/types.h>
 #include <stdbool.h>
 
-enum {BIN_IMPORTS = 9};
+enum {BIN_IMPORTS = 10};
 
 struct bin_dbg
 {
@@ -54,18 +54,25 @@ struct bin_global
     size_t sz;
 };
 
+struct bin_proc_fd
+{
+    int fd, flags;
+    struct fs_fd fs_fd;
+};
+
 struct bin_proc
 {
     const struct bin_mod *mod;
     struct nw_inst instance;
-    union nw_value args[7];
+    union nw_value args[6];
     struct bin_dbg dbg;
     struct caio *caio;
     char *path, **argv;
     size_t argc;
-    pid_t pid;
+    pid_t pid, parent;
     uid_t uid;
     gid_t gid;
+    mode_t umask;
     char header[sizeof "asm"];
     size_t i;
     long retval;
@@ -73,7 +80,8 @@ struct bin_proc
     struct bin_global global;
     void *import;
     struct page *linear;
-    int *fds;
+    struct fs_stdstreams ss;
+    struct bin_proc_fd *fds;
     size_t n_fds;
     struct bin_proc *prev, *next;
 };
diff --git a/src/bin/private_include/bin/wasi/errno.h b/src/bin/private_include/bin/wasi/errno.h
deleted file mode 100644
index 442e877..0000000
--- a/src/bin/private_include/bin/wasi/errno.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * wnix, a Unix-like operating system for WebAssembly applications.
- * Copyright (C) 2025  Xavier Del Campo Romero
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-#ifndef WASI_ERRNO_H
-#define WASI_ERRNO_H
-
-enum wasi_errno
-{
-    WASI_SUCCESS,
-    WASI_2BIG,
-    WASI_ACCES,
-    WASI_ADDRINUSE,
-    WASI_ADDRNOTAVAIL,
-    WASI_AFNOSUPPORT,
-    WASI_AGAIN,
-    WASI_ALREADY,
-    WASI_BADF,
-    WASI_BADMSG,
-    WASI_BUSY,
-    WASI_CANCELED,
-    WASI_CHILD,
-    WASI_CONNABORTED,
-    WASI_CONNREFUSED,
-    WASI_CONNRESET,
-    WASI_DEADLK,
-    WASI_DESTADDRREQ,
-    WASI_DOM,
-    WASI_DQUOT,
-    WASI_EXIST,
-    WASI_FAULT,
-    WASI_FBIG,
-    WASI_HOSTUNREACH,
-    WASI_IDRM,
-    WASI_ILSEQ,
-    WASI_INPROGRESS,
-    WASI_INTR,
-    WASI_INVAL,
-    WASI_IO,
-    WASI_ISCONN,
-    WASI_ISDIR,
-    WASI_LOOP,
-    WASI_MFILE,
-    WASI_MLINK,
-    WASI_MSGSIZE,
-    WASI_MULTIHOP,
-    WASI_NAMETOOLONG,
-    WASI_NETDOWN,
-    WASI_NETRESET,
-    WASI_NETUNREACH,
-    WASI_NFILE,
-    WASI_NOBUFS,
-    WASI_NODEV,
-    WASI_NOENT,
-    WASI_NOEXEC,
-    WASI_NOLCK,
-    WASI_NOLINK,
-    WASI_NOMEM,
-    WASI_NOMSG,
-    WASI_NOPROTOOPT,
-    WASI_NOSPC,
-    WASI_NOSYS,
-    WASI_NOTCONN,
-    WASI_NOTDIR,
-    WASI_NOTEMPTY,
-    WASI_NOTRECOVERABLE,
-    WASI_NOTSOCK,
-    WASI_NOTSUP,
-    WASI_NOTTY,
-    WASI_NXIO,
-    WASI_OVERFLOW,
-    WASI_OWNERDEAD,
-    WASI_PERM,
-    WASI_PIPE,
-    WASI_PROTO,
-    WASI_PROTONOSUPPORT,
-    WASI_PROTOTYPE,
-    WASI_RANGE,
-    WASI_ROFS,
-    WASI_SPIPE,
-    WASI_SRCH,
-    WASI_STALE,
-    WASI_TIMEDOUT,
-    WASI_TXTBSY,
-    WASI_XDEV,
-    WASI_NOTCAPABLE
-};
-
-int wasi_errno(int error, enum wasi_errno *out);
-
-#endif
diff --git a/src/bin/private_include/bin/wnix.h b/src/bin/private_include/bin/wnix.h
index 07e7131..f3844c5 100644
--- a/src/bin/private_include/bin/wnix.h
+++ b/src/bin/private_include/bin/wnix.h
@@ -33,5 +33,13 @@ enum nw_state bin_wnix_mkdir(const union nw_value *params,
     union nw_value *ret, void *user, struct nw_next *next);
 enum nw_state bin_wnix_mount(const union nw_value *params,
     union nw_value *ret, void *user, struct nw_next *next);
+enum nw_state bin_wnix_write(const union nw_value *params,
+    union nw_value *ret, void *user, struct nw_next *next);
+enum nw_state bin_wnix_umask(const union nw_value *params,
+    union nw_value *ret, void *user, struct nw_next *next);
+enum nw_state bin_wnix_open(const union nw_value *params,
+    union nw_value *ret, void *user, struct nw_next *next);
+enum nw_state bin_wnix_close(const union nw_value *params,
+    union nw_value *ret, void *user, struct nw_next *next);
 
 #endif
diff --git a/src/bin/private_include/bin/wnix/routines.h b/src/bin/private_include/bin/wnix/routines.h
index aa488fb..3ba5118 100644
--- a/src/bin/private_include/bin/wnix/routines.h
+++ b/src/bin/private_include/bin/wnix/routines.h
@@ -23,7 +23,22 @@
 #include <bin/types.h>
 #include <nanowasm/nw.h>
 
-int bin_wnix_set_errno(struct bin_proc *p, int error, unsigned long addr,
-    struct nw_next *next);
+struct bin_readstr
+{
+    unsigned long addr;
+    struct bin_proc *p;
+    char **str;
+    int (*error)(struct bin_proc *, int, struct nw_next *);
+};
+
+struct bin_set_errno
+{
+    int error;
+    unsigned long addr;
+    struct bin_proc *p;
+};
+
+int bin_wnix_readstr(const struct bin_readstr *cfg, struct nw_next *next);
+int bin_wnix_set_errno(const struct bin_set_errno *cfg, struct nw_next *next);
 
 #endif