mirror of
https://github.com/opnsense/src.git
synced 2026-06-06 23:32:52 -04:00
f35ccf46c7
The fnmatch function matches a string against a shell-style filename pattern. It is a complex function and cannot easily be implenented using regular expressions. Adding fnmatch to flua increases the amd64 binary by less than 1 KB. Approved by: markj MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D46849
595 lines
11 KiB
C
595 lines
11 KiB
C
/*-
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* Copyright (c) 2019, 2023 Kyle Evans <kevans@FreeBSD.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <fnmatch.h>
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#include <grp.h>
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#include <libgen.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <lua.h>
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#include "lauxlib.h"
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#include "lposix.h"
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/*
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* Minimal implementation of luaposix needed for internal FreeBSD bits.
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*/
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static int
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lua__exit(lua_State *L)
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{
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int code, narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg == 1, 1, "_exit takes exactly one argument");
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code = luaL_checkinteger(L, 1);
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_exit(code);
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}
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static int
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lua_basename(lua_State *L)
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{
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char *inpath, *outpath;
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int narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg > 0, 1, "at least one argument required");
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inpath = strdup(luaL_checkstring(L, 1));
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if (inpath == NULL) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(ENOMEM));
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lua_pushinteger(L, ENOMEM);
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return (3);
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}
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outpath = basename(inpath);
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lua_pushstring(L, outpath);
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free(inpath);
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return (1);
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}
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static int
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lua_chmod(lua_State *L)
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{
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int n;
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const char *path;
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mode_t mode;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
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"chmod takes exactly two arguments");
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path = luaL_checkstring(L, 1);
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mode = (mode_t)luaL_checkinteger(L, 2);
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if (chmod(path, mode) == -1) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushinteger(L, 0);
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return (1);
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}
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static int
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lua_chown(lua_State *L)
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{
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int n;
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const char *path;
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uid_t owner = (uid_t) -1;
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gid_t group = (gid_t) -1;
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n = lua_gettop(L);
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luaL_argcheck(L, n > 1, n,
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"chown takes at least two arguments");
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path = luaL_checkstring(L, 1);
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if (lua_isinteger(L, 2))
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owner = (uid_t) lua_tointeger(L, 2);
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else if (lua_isstring(L, 2)) {
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struct passwd *p = getpwnam(lua_tostring(L, 2));
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if (p != NULL)
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owner = p->pw_uid;
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else
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return (luaL_argerror(L, 2,
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lua_pushfstring(L, "unknown user %s",
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lua_tostring(L, 2))));
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} else if (!lua_isnoneornil(L, 2)) {
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const char *type = luaL_typename(L, 2);
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return (luaL_argerror(L, 2,
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lua_pushfstring(L, "integer or string expected, got %s",
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type)));
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}
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if (lua_isinteger(L, 3))
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group = (gid_t) lua_tointeger(L, 3);
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else if (lua_isstring(L, 3)) {
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struct group *g = getgrnam(lua_tostring(L, 3));
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if (g != NULL)
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group = g->gr_gid;
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else
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return (luaL_argerror(L, 3,
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lua_pushfstring(L, "unknown group %s",
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lua_tostring(L, 3))));
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} else if (!lua_isnoneornil(L, 3)) {
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const char *type = luaL_typename(L, 3);
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return (luaL_argerror(L, 3,
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lua_pushfstring(L, "integer or string expected, got %s",
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type)));
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}
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if (chown(path, owner, group) == -1) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushinteger(L, 0);
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return (1);
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}
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static int
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lua_pclose(lua_State *L)
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{
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int error, fd, n;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 1, 1,
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"close takes exactly one argument (fd)");
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fd = luaL_checkinteger(L, 1);
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if (fd < 0) {
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error = EBADF;
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goto err;
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}
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if (close(fd) == 0) {
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lua_pushinteger(L, 0);
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return (1);
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}
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error = errno;
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err:
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lua_pushnil(L);
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lua_pushstring(L, strerror(error));
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lua_pushinteger(L, error);
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return (3);
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}
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static int
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lua_fnmatch(lua_State *L)
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{
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const char *pattern, *string;
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int flags, n;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 2 || n == 3, 4, "need 2 or 3 arguments");
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pattern = luaL_checkstring(L, 1);
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string = luaL_checkstring(L, 2);
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flags = luaL_optinteger(L, 3, 0);
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lua_pushinteger(L, fnmatch(pattern, string, flags));
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return (1);
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}
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static int
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lua_uname(lua_State *L)
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{
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struct utsname name;
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int error, n;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 0, 1, "too many arguments");
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error = uname(&name);
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if (error != 0) {
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error = errno;
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lua_pushnil(L);
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lua_pushstring(L, strerror(error));
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lua_pushinteger(L, error);
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return (3);
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}
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lua_newtable(L);
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#define setkv(f) do { \
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lua_pushstring(L, name.f); \
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lua_setfield(L, -2, #f); \
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} while (0)
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setkv(sysname);
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setkv(nodename);
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setkv(release);
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setkv(version);
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setkv(machine);
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#undef setkv
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return (1);
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}
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static int
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lua_dirname(lua_State *L)
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{
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char *inpath, *outpath;
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int narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg > 0, 1,
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"dirname takes at least one argument (path)");
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inpath = strdup(luaL_checkstring(L, 1));
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if (inpath == NULL) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(ENOMEM));
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lua_pushinteger(L, ENOMEM);
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return (3);
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}
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outpath = dirname(inpath);
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lua_pushstring(L, outpath);
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free(inpath);
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return (1);
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}
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static int
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lua_fork(lua_State *L)
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{
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pid_t pid;
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int narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg == 0, 1, "too many arguments");
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pid = fork();
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if (pid < 0) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushinteger(L, pid);
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return (1);
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}
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static int
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lua_getpid(lua_State *L)
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{
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int narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg == 0, 1, "too many arguments");
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lua_pushinteger(L, getpid());
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return (1);
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}
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static int
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lua_pipe(lua_State *L)
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{
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int error, fd[2], narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg == 0, 1, "too many arguments");
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error = pipe(fd);
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if (error != 0) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (1);
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}
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lua_pushinteger(L, fd[0]);
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lua_pushinteger(L, fd[1]);
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return (2);
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}
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static int
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lua_read(lua_State *L)
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{
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char *buf;
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ssize_t ret;
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size_t sz;
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int error, fd, narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg == 2, 1,
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"read takes exactly two arguments (fd, size)");
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fd = luaL_checkinteger(L, 1);
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sz = luaL_checkinteger(L, 2);
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if (fd < 0) {
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error = EBADF;
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goto err;
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}
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buf = malloc(sz);
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if (buf == NULL)
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goto err;
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/*
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* For 0-byte reads, we'll still push the empty string and let the
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* caller deal with EOF to match lposix semantics.
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*/
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ret = read(fd, buf, sz);
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if (ret >= 0)
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lua_pushlstring(L, buf, ret);
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else if (ret < 0)
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error = errno; /* Save to avoid clobber by free() */
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free(buf);
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if (error != 0)
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goto err;
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/* Just the string pushed. */
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return (1);
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err:
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lua_pushnil(L);
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lua_pushstring(L, strerror(error));
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lua_pushinteger(L, error);
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return (3);
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}
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static int
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lua_realpath(lua_State *L)
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{
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const char *inpath;
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char *outpath;
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int narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg > 0, 1, "at least one argument required");
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inpath = luaL_checkstring(L, 1);
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outpath = realpath(inpath, NULL);
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if (outpath == NULL) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushstring(L, outpath);
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free(outpath);
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return (1);
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}
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static int
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lua_wait(lua_State *L)
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{
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pid_t pid;
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int options, status;
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int narg;
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narg = lua_gettop(L);
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pid = -1;
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status = options = 0;
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if (narg >= 1 && !lua_isnil(L, 1))
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pid = luaL_checkinteger(L, 1);
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if (narg >= 2 && !lua_isnil(L, 2))
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options = luaL_checkinteger(L, 2);
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pid = waitpid(pid, &status, options);
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if (pid < 0) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushinteger(L, pid);
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if (pid == 0) {
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lua_pushliteral(L, "running");
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return (2);
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}
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if (WIFCONTINUED(status)) {
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lua_pushliteral(L, "continued");
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return (2);
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} else if(WIFSTOPPED(status)) {
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lua_pushliteral(L, "stopped");
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lua_pushinteger(L, WSTOPSIG(status));
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return (3);
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} else if (WIFEXITED(status)) {
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lua_pushliteral(L, "exited");
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lua_pushinteger(L, WEXITSTATUS(status));
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return (3);
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} else if (WIFSIGNALED(status)) {
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lua_pushliteral(L, "killed");
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lua_pushinteger(L, WTERMSIG(status));
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return (3);
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}
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return (1);
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}
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static int
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lua_write(lua_State *L)
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{
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const char *buf;
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size_t bufsz, sz;
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ssize_t ret;
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off_t offset;
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int error, fd, narg;
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narg = lua_gettop(L);
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luaL_argcheck(L, narg >= 2, 1,
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"write takes at least two arguments (fd, buf, sz, off)");
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luaL_argcheck(L, narg <= 4, 5,
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"write takes no more than four arguments (fd, buf, sz, off)");
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fd = luaL_checkinteger(L, 1);
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if (fd < 0) {
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error = EBADF;
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goto err;
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}
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buf = luaL_checkstring(L, 2);
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bufsz = sz = lua_rawlen(L, 2);
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if (narg >= 3 && !lua_isnil(L, 3))
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sz = luaL_checkinteger(L, 3);
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offset = 0;
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if (narg >= 4 && !lua_isnil(L, 4))
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offset = luaL_checkinteger(L, 4);
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if ((size_t)offset > bufsz || offset + sz > bufsz) {
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lua_pushnil(L);
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lua_pushfstring(L,
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"write: invalid access offset %zu, size %zu in a buffer size %zu",
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offset, sz, bufsz);
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lua_pushinteger(L, EINVAL);
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return (3);
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}
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ret = write(fd, buf + offset, sz);
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if (ret < 0) {
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error = errno;
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goto err;
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}
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lua_pushinteger(L, ret);
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return (1);
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err:
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lua_pushnil(L);
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lua_pushstring(L, strerror(error));
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lua_pushinteger(L, error);
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return (3);
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}
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#define REG_DEF(n, func) { #n, func }
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#define REG_SIMPLE(n) REG_DEF(n, lua_ ## n)
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static const struct luaL_Reg libgenlib[] = {
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REG_SIMPLE(basename),
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REG_SIMPLE(dirname),
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{ NULL, NULL },
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};
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static const struct luaL_Reg stdliblib[] = {
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REG_SIMPLE(realpath),
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{ NULL, NULL },
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};
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static const struct luaL_Reg fnmatchlib[] = {
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REG_SIMPLE(fnmatch),
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{ NULL, NULL },
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};
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static const struct luaL_Reg sys_statlib[] = {
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REG_SIMPLE(chmod),
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{ NULL, NULL },
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};
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static const struct luaL_Reg sys_utsnamelib[] = {
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REG_SIMPLE(uname),
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{ NULL, NULL },
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};
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static const struct luaL_Reg sys_waitlib[] = {
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REG_SIMPLE(wait),
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{NULL, NULL},
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};
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static const struct luaL_Reg unistdlib[] = {
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REG_SIMPLE(_exit),
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REG_SIMPLE(chown),
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REG_DEF(close, lua_pclose),
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REG_SIMPLE(fork),
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REG_SIMPLE(getpid),
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REG_SIMPLE(pipe),
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REG_SIMPLE(read),
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REG_SIMPLE(write),
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{ NULL, NULL },
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};
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#undef REG_SIMPLE
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#undef REG_DEF
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int
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luaopen_posix_libgen(lua_State *L)
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{
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luaL_newlib(L, libgenlib);
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return (1);
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}
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int
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luaopen_posix_stdlib(lua_State *L)
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|
{
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luaL_newlib(L, stdliblib);
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return (1);
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}
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int
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luaopen_posix_fnmatch(lua_State *L)
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{
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luaL_newlib(L, fnmatchlib);
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#define setkv(f) do { \
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lua_pushinteger(L, f); \
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lua_setfield(L, -2, #f); \
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} while (0)
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setkv(FNM_PATHNAME);
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setkv(FNM_NOESCAPE);
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setkv(FNM_NOMATCH);
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setkv(FNM_PERIOD);
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#undef setkv
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return 1;
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}
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int
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luaopen_posix_sys_stat(lua_State *L)
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{
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luaL_newlib(L, sys_statlib);
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return (1);
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}
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int
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luaopen_posix_sys_wait(lua_State *L)
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{
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luaL_newlib(L, sys_waitlib);
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#define lua_pushflag(L, flag) do { \
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lua_pushinteger(L, flag); \
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lua_setfield(L, -2, #flag); \
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|
} while(0)
|
|
|
|
/* Only these two exported by lposix */
|
|
lua_pushflag(L, WNOHANG);
|
|
lua_pushflag(L, WUNTRACED);
|
|
|
|
lua_pushflag(L, WCONTINUED);
|
|
lua_pushflag(L, WSTOPPED);
|
|
#ifdef WTRAPPED
|
|
lua_pushflag(L, WTRAPPED);
|
|
#endif
|
|
lua_pushflag(L, WEXITED);
|
|
lua_pushflag(L, WNOWAIT);
|
|
#undef lua_pushflag
|
|
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
luaopen_posix_sys_utsname(lua_State *L)
|
|
{
|
|
luaL_newlib(L, sys_utsnamelib);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
luaopen_posix_unistd(lua_State *L)
|
|
{
|
|
luaL_newlib(L, unistdlib);
|
|
return (1);
|
|
}
|