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D39083.id120527.diff
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diff --git a/libexec/flua/linit_flua.c b/libexec/flua/linit_flua.c
--- a/libexec/flua/linit_flua.c
+++ b/libexec/flua/linit_flua.c
@@ -58,7 +58,10 @@
#endif
/* FreeBSD Extensions */
{"lfs", luaopen_lfs},
+ {"posix.libgen", luaopen_posix_libgen},
+ {"posix.stdlib", luaopen_posix_stdlib},
{"posix.sys.stat", luaopen_posix_sys_stat},
+ {"posix.sys.wait", luaopen_posix_sys_wait},
{"posix.unistd", luaopen_posix_unistd},
{"ucl", luaopen_ucl},
{NULL, NULL}
diff --git a/libexec/flua/modules/lposix.h b/libexec/flua/modules/lposix.h
--- a/libexec/flua/modules/lposix.h
+++ b/libexec/flua/modules/lposix.h
@@ -8,5 +8,8 @@
#include <lua.h>
+int luaopen_posix_libgen(lua_State *L);
+int luaopen_posix_stdlib(lua_State *L);
int luaopen_posix_sys_stat(lua_State *L);
+int luaopen_posix_sys_wait(lua_State *L);
int luaopen_posix_unistd(lua_State *L);
diff --git a/libexec/flua/modules/lposix.c b/libexec/flua/modules/lposix.c
--- a/libexec/flua/modules/lposix.c
+++ b/libexec/flua/modules/lposix.c
@@ -1,5 +1,7 @@
/*-
- * Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019, 2023 Kyle Evans <kevans@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -28,10 +30,13 @@
__FBSDID("$FreeBSD$");
#include <sys/stat.h>
+#include <sys/wait.h>
#include <errno.h>
#include <grp.h>
+#include <libgen.h>
#include <pwd.h>
+#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@@ -42,6 +47,39 @@
/*
* Minimal implementation of luaposix needed for internal FreeBSD bits.
*/
+static int
+lua__exit(lua_State *L)
+{
+ int code, narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg == 1, 1, "_exit takes exactly one argument");
+
+ code = luaL_checkinteger(L, 1);
+ _exit(code);
+}
+
+static int
+lua_basename(lua_State *L)
+{
+ char *inpath, *outpath;
+ int narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg > 0, 1, "at least one argument required");
+ inpath = strdup(luaL_checkstring(L, 1));
+ if (inpath == NULL) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(ENOMEM));
+ lua_pushinteger(L, ENOMEM);
+ return (3);
+ }
+
+ outpath = basename(inpath);
+ lua_pushstring(L, outpath);
+ free(inpath);
+ return (1);
+}
static int
lua_chmod(lua_State *L)
@@ -59,10 +97,10 @@
lua_pushnil(L);
lua_pushstring(L, strerror(errno));
lua_pushinteger(L, errno);
- return 3;
+ return (3);
}
lua_pushinteger(L, 0);
- return 1;
+ return (1);
}
static int
@@ -122,39 +160,371 @@
}
static int
-lua_getpid(lua_State *L)
+lua_pclose(lua_State *L)
{
- int n;
+ int error, fd, n;
n = lua_gettop(L);
- luaL_argcheck(L, n == 0, 1, "too many arguments");
+ luaL_argcheck(L, n == 1, 1,
+ "close takes exactly one arguments (fd)");
+
+ fd = luaL_checkinteger(L, 1);
+ if (fd < 0) {
+ error = EBADF;
+ goto err;
+ }
+
+ if (close(fd) == 0) {
+ lua_pushinteger(L, 0);
+ return (1);
+ }
+
+ error = errno;
+err:
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(error));
+ lua_pushinteger(L, error);
+ return (3);
+
+}
+
+static int
+lua_dirname(lua_State *L)
+{
+ char *inpath, *outpath;
+ int narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg > 0, 1, "at least one argument required");
+ inpath = strdup(luaL_checkstring(L, 1));
+ if (inpath == NULL) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(ENOMEM));
+ lua_pushinteger(L, ENOMEM);
+ return (3);
+ }
+
+ outpath = dirname(inpath);
+ lua_pushstring(L, outpath);
+ free(inpath);
+ return (1);
+}
+
+static int
+lua_fork(lua_State *L)
+{
+ pid_t pid;
+ int narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg == 0, 1, "too many arguments");
+
+ pid = fork();
+ if (pid < 0) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+
+ lua_pushinteger(L, pid);
+ return (1);
+}
+
+static int
+lua_getpid(lua_State *L)
+{
+ int narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg == 0, 1, "too many arguments");
lua_pushinteger(L, getpid());
- return 1;
+ return (1);
+}
+
+static int
+lua_pipe(lua_State *L)
+{
+ int error, fd[2], narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg == 0, 1, "too many arguments");
+
+ error = pipe(fd);
+ if (error != 0) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (1);
+ }
+
+ lua_pushinteger(L, fd[0]);
+ lua_pushinteger(L, fd[1]);
+ return (2);
+}
+
+static int
+lua_read(lua_State *L)
+{
+ char *buf;
+ ssize_t ret;
+ size_t sz;
+ int error, fd, narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg == 2, 1,
+ "read takes exactly two arguments (fd, size)");
+
+ fd = luaL_checkinteger(L, 1);
+ sz = luaL_checkinteger(L, 2);
+
+ if (fd < 0) {
+ error = EBADF;
+ goto err;
+ }
+
+ buf = malloc(sz);
+ if (buf == NULL)
+ goto err;
+
+ /*
+ * For 0-byte reads, we'll still push the empty string and let the
+ * caller deal with EOF to match lposix semantics.
+ */
+ ret = read(fd, buf, sz);
+ if (ret >= 0)
+ lua_pushlstring(L, buf, ret);
+ else if (ret < 0)
+ error = errno; /* Save to avoid clobber by free() */
+
+ free(buf);
+ if (error != 0)
+ goto err;
+
+ /* Just the string pushed. */
+ return (1);
+err:
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(error));
+ lua_pushinteger(L, error);
+ return (3);
+}
+
+static int
+lua_realpath(lua_State *L)
+{
+ const char *inpath;
+ char *outpath;
+ int narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg > 0, 1, "at least one argument required");
+ inpath = luaL_checkstring(L, 1);
+
+ outpath = realpath(inpath, NULL);
+ if (outpath == NULL) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+
+ lua_pushstring(L, outpath);
+ free(outpath);
+ return (1);
+}
+
+static int
+lua_wait(lua_State *L)
+{
+ pid_t pid;
+ int options, status;
+ int narg;
+
+ narg = lua_gettop(L);
+
+ pid = -1;
+ status = options = 0;
+ if (narg >= 1 && !lua_isnil(L, 1))
+ pid = luaL_checkinteger(L, 1);
+ if (narg >= 2 && !lua_isnil(L, 2))
+ options = luaL_checkinteger(L, 2);
+
+ pid = waitpid(pid, &status, options);
+ if (pid < 0) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+
+ lua_pushinteger(L, pid);
+ if (pid == 0) {
+ lua_pushliteral(L, "running");
+ return (2);
+ }
+
+ if (WIFCONTINUED(status)) {
+ lua_pushliteral(L, "continued");
+ return (2);
+ } else if(WIFSTOPPED(status)) {
+ lua_pushliteral(L, "stopped");
+ lua_pushinteger(L, WSTOPSIG(status));
+ return (3);
+ } else if (WIFEXITED(status)) {
+ lua_pushliteral(L, "exited");
+ lua_pushinteger(L, WEXITSTATUS(status));
+ return (3);
+ } else if (WIFSIGNALED(status)) {
+ lua_pushliteral(L, "killed");
+ lua_pushinteger(L, WTERMSIG(status));
+ return (3);
+ }
+
+ return (1);
+}
+
+static int
+lua_write(lua_State *L)
+{
+ const char *buf;
+ size_t bufsz, sz;
+ ssize_t ret;
+ off_t offset;
+ int error, fd, narg;
+
+ narg = lua_gettop(L);
+ luaL_argcheck(L, narg >= 2, 1,
+ "write takes at least two arguments (fd, buf, sz, off)");
+ luaL_argcheck(L, narg <= 4, 5,
+ "write takes no more than four arguments (fd, buf, sz, off)");
+
+ fd = luaL_checkinteger(L, 1);
+ if (fd < 0) {
+ error = EBADF;
+ goto err;
+ }
+
+ buf = luaL_checkstring(L, 2);
+
+ bufsz = sz = lua_rawlen(L, 2);
+ if (narg >= 3 && !lua_isnil(L, 3))
+ sz = luaL_checkinteger(L, 3);
+
+ offset = 0;
+ if (narg >= 4 && !lua_isnil(L, 4))
+ offset = luaL_checkinteger(L, 4);
+
+ if (offset > bufsz || offset + sz > bufsz) {
+ lua_pushnil(L);
+ lua_pushfstring(L,
+ "write: invalid access offset %zu, size %zu in a buffer size %zu",
+ offset, sz, bufsz);
+ lua_pushinteger(L, EINVAL);
+ return (3);
+ }
+
+ ret = write(fd, buf + offset, sz);
+ if (ret < 0) {
+ error = errno;
+ goto err;
+ }
+
+ lua_pushinteger(L, ret);
+ return (1);
+err:
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(error));
+ lua_pushinteger(L, error);
+ return (3);
}
-#define REG_SIMPLE(n) { #n, lua_ ## n }
+#define REG_DEF(n, func) { #n, func }
+#define REG_SIMPLE(n) REG_DEF(n, lua_ ## n)
+static const struct luaL_Reg libgenlib[] = {
+ REG_SIMPLE(basename),
+ REG_SIMPLE(dirname),
+ { NULL, NULL },
+};
+
+static const struct luaL_Reg stdliblib[] = {
+ REG_SIMPLE(realpath),
+ { NULL, NULL },
+};
+
static const struct luaL_Reg sys_statlib[] = {
REG_SIMPLE(chmod),
{ NULL, NULL },
};
+static const struct luaL_Reg sys_waitlib[] = {
+ REG_SIMPLE(wait),
+ {NULL, NULL},
+};
+
static const struct luaL_Reg unistdlib[] = {
- REG_SIMPLE(getpid),
+ REG_SIMPLE(_exit),
REG_SIMPLE(chown),
+ REG_DEF(close, lua_pclose),
+ REG_SIMPLE(fork),
+ REG_SIMPLE(getpid),
+ REG_SIMPLE(pipe),
+ REG_SIMPLE(read),
+ REG_SIMPLE(write),
{ NULL, NULL },
};
+
#undef REG_SIMPLE
+#undef REG_DEF
+
+int
+luaopen_posix_libgen(lua_State *L)
+{
+ luaL_newlib(L, libgenlib);
+ return (1);
+}
+
+int
+luaopen_posix_stdlib(lua_State *L)
+{
+ luaL_newlib(L, stdliblib);
+ return (1);
+}
int
luaopen_posix_sys_stat(lua_State *L)
{
luaL_newlib(L, sys_statlib);
- return 1;
+ return (1);
+}
+
+int
+luaopen_posix_sys_wait(lua_State *L)
+{
+ luaL_newlib(L, sys_waitlib);
+
+#define lua_pushflag(L, flag) do { \
+ lua_pushinteger(L, flag); \
+ lua_setfield(L, -2, #flag); \
+} while(0)
+
+ /* Only these two exported by lposix */
+ lua_pushflag(L, WNOHANG);
+ lua_pushflag(L, WUNTRACED);
+
+ lua_pushflag(L, WCONTINUED);
+ lua_pushflag(L, WSTOPPED);
+ lua_pushflag(L, WTRAPPED);
+ lua_pushflag(L, WEXITED);
+ lua_pushflag(L, WNOWAIT);
+#undef lua_pushflag
+
+ return (1);
}
int
luaopen_posix_unistd(lua_State *L)
{
luaL_newlib(L, unistdlib);
- return 1;
+ return (1);
}

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