The branch main has been updated by bapt:
URL:
https://cgit.FreeBSD.org/src/commit/?id=696922fbfa3e1c400701a3a39dcadf7dee12b06c
commit 696922fbfa3e1c400701a3a39dcadf7dee12b06c
Author: Baptiste Daroussin <b...@freebsd.org>
AuthorDate: 2024-09-12 12:42:01 +0000
Commit: Baptiste Daroussin <b...@freebsd.org>
CommitDate: 2024-09-14 05:43:50 +0000
flua: add freebsd.kenv, kenv(2) bindings
Add bindings for kenv(2) right now only get() has been created
it allows do dump into a key/value table the kernel environement if
no argument is passed, or it returns the value associated to the
provided key.
Reviewed by: imp, kevans, markj
Accepted by: imp, kevans
Differential Revision: https://reviews.freebsd.org/D46654
---
libexec/flua/libfreebsd/Makefile | 1 +
libexec/flua/libfreebsd/Makefile.inc | 2 +
libexec/flua/libfreebsd/kenv/Makefile | 5 ++
libexec/flua/libfreebsd/kenv/freebsd.kenv.3lua | 44 ++++++++++++
libexec/flua/libfreebsd/kenv/kenv.c | 96 ++++++++++++++++++++++++++
5 files changed, 148 insertions(+)
diff --git a/libexec/flua/libfreebsd/Makefile b/libexec/flua/libfreebsd/Makefile
index 6ed0451055ff..36d39d6b0502 100644
--- a/libexec/flua/libfreebsd/Makefile
+++ b/libexec/flua/libfreebsd/Makefile
@@ -1,3 +1,4 @@
+SUBDIR+= kenv
SUBDIR+= sys
.include <bsd.subdir.mk>
diff --git a/libexec/flua/libfreebsd/Makefile.inc
b/libexec/flua/libfreebsd/Makefile.inc
index 01b5f23410c8..26a1540482c7 100644
--- a/libexec/flua/libfreebsd/Makefile.inc
+++ b/libexec/flua/libfreebsd/Makefile.inc
@@ -1 +1,3 @@
+SHLIBDIR?= ${LIBDIR}/flua/freebsd
+
.include "../Makefile.inc"
diff --git a/libexec/flua/libfreebsd/kenv/Makefile
b/libexec/flua/libfreebsd/kenv/Makefile
new file mode 100644
index 000000000000..1726c892c515
--- /dev/null
+++ b/libexec/flua/libfreebsd/kenv/Makefile
@@ -0,0 +1,5 @@
+SHLIB_NAME= kenv.so
+SRCS+= kenv.c
+MAN= freebsd.kenv.3lua
+
+.include <bsd.lib.mk>
diff --git a/libexec/flua/libfreebsd/kenv/freebsd.kenv.3lua
b/libexec/flua/libfreebsd/kenv/freebsd.kenv.3lua
new file mode 100644
index 000000000000..d254dd22c91c
--- /dev/null
+++ b/libexec/flua/libfreebsd/kenv/freebsd.kenv.3lua
@@ -0,0 +1,44 @@
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
+.\" Copyright (c) 2024, Baptiste Daroussin <b...@freebsd.org>
+.\"
+.Dd September 6, 2024
+.Dt FREEBSD.KENV 3lua
+.Os
+.Sh NAME
+.Nm freebsd.kenv
+.Nd Lua binding to
+.Fx 's
+Linker functions
+.Sh SYNOPSIS
+.Bd -literal
+local kenv = require('freebsd.kenv')
+.Ed
+.Pp
+.Bl -tag -width XXXX -compact
+.It Dv table = kenv.get()
+.It Dv value = kenv.get(key)
+.El
+.Sh DESCRIPTION
+The
+.Nm
+module is a binding to the
+.Xr kenv 2
+function.
+.Pp
+List of functions:
+.Bl -tag -width XXXX
+.It Dv table = freebsd.kenv.get()
+Dump the kernel environnement into a key/value
+.Fa table .
+.It Dv value = freebsd.kenv.get(key)
+Return the
+.Fa value
+associated to the
+.Fa key ,
+if it exists, or
+.Va nil
+otherwise.
+.Sh SEE ALSO
+.Xr kenv 2
diff --git a/libexec/flua/libfreebsd/kenv/kenv.c
b/libexec/flua/libfreebsd/kenv/kenv.c
new file mode 100644
index 000000000000..954baa00facb
--- /dev/null
+++ b/libexec/flua/libfreebsd/kenv/kenv.c
@@ -0,0 +1,96 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024, Baptiste Daroussin <b...@freebsd.org>
+ */
+
+#include <errno.h>
+#include <kenv.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+int luaopen_freebsd_kenv(lua_State *L);
+
+static int
+lua_kenv_get(lua_State *L)
+{
+ const char *env;
+ int ret, n;
+ char value[1024];
+
+ n = lua_gettop(L);
+ if (n == 0) {
+ char *buf, *bp, *cp;
+ int size;
+
+ size = kenv(KENV_DUMP, NULL, NULL, 0);
+ if (size < 0) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+ size += 1;
+ buf = malloc(size);
+ if (buf == NULL) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+ if (kenv(KENV_DUMP, NULL, buf, size) < 0) {
+ free(buf);
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+
+ lua_newtable(L);
+ for (bp = buf; *bp != '\0'; bp += strlen(bp) + 1) {
+ cp = strchr(bp, '=');
+ if (cp == NULL)
+ continue;
+ *cp++ = '\0';
+ lua_pushstring(L, cp);
+ lua_setfield(L, -2, bp);
+ bp = cp;
+ }
+ free(buf);
+ return (1);
+ }
+ env = luaL_checkstring(L, 1);
+ ret = kenv(KENV_GET, env, value, sizeof(value));
+ if (ret == -1) {
+ if (errno == ENOENT) {
+ lua_pushnil(L);
+ return (1);
+ }
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ lua_pushinteger(L, errno);
+ return (3);
+ }
+ lua_pushstring(L, value);
+ return (1);
+}
+
+#define REG_SIMPLE(n) { #n, lua_kenv_ ## n }
+static const struct luaL_Reg freebsd_kenv[] = {
+ REG_SIMPLE(get),
+ { NULL, NULL },
+};
+#undef REG_SIMPLE
+
+int
+luaopen_freebsd_kenv(lua_State *L)
+{
+ luaL_newlib(L, freebsd_kenv);
+
+ return (1);
+}
