From d8775ec1e6b5d0b8750dc6bf379a76c01ac10e5f Mon Sep 17 00:00:00 2001
From: Hisham Muhammad <hisham@gobolinux.org>
Date: Tue, 4 Mar 2025 02:05:50 -0300
Subject: miniposix: minimal subset of luaposix API for LuaRocks

---
 vendor/miniposix/Makefile                 |  10 +++
 vendor/miniposix/miniposix-dev-1.rockspec |  15 +++++
 vendor/miniposix/miniposix.c              | 106 ++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 vendor/miniposix/Makefile
 create mode 100644 vendor/miniposix/miniposix-dev-1.rockspec
 create mode 100644 vendor/miniposix/miniposix.c

(limited to 'vendor')

diff --git a/vendor/miniposix/Makefile b/vendor/miniposix/Makefile
new file mode 100644
index 00000000..09b550ce
--- /dev/null
+++ b/vendor/miniposix/Makefile
@@ -0,0 +1,10 @@
+all: miniposix.a
+
+miniposix.a: miniposix.o
+	$(AR) rcu miniposix.a miniposix.o
+
+miniposix.o: miniposix.c
+	$(CC) -c miniposix.c
+
+clean:
+	rm *.o *.a
diff --git a/vendor/miniposix/miniposix-dev-1.rockspec b/vendor/miniposix/miniposix-dev-1.rockspec
new file mode 100644
index 00000000..a74af5f4
--- /dev/null
+++ b/vendor/miniposix/miniposix-dev-1.rockspec
@@ -0,0 +1,15 @@
+package = "miniposix"
+version = "dev-1"
+source = {
+   url = "./miniposix.c",
+}
+description = {
+   summary = "Minimal set of posix functions used by LuaRocks",
+   license = "MIT/X11",
+}
+build = {
+   type = "builtin",
+   modules = {
+      ["miniposix"] = "miniposix.c"
+   }
+}
diff --git a/vendor/miniposix/miniposix.c b/vendor/miniposix/miniposix.c
new file mode 100644
index 00000000..21052f4d
--- /dev/null
+++ b/vendor/miniposix/miniposix.c
@@ -0,0 +1,106 @@
+#include <lua.h>
+#include <lauxlib.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+static int miniposix_chmod(lua_State* L) {
+   const char* filename = luaL_checkstring(L, 1);
+   const char* permissions = luaL_checkstring(L, 2);
+   mode_t mode = 0;
+
+   if (strlen(permissions) != 9) {
+      return luaL_error(L, "invalid permissions string (expected \"rwxrwxrwx\" format)");
+   }
+
+   if (permissions[0] == 'r') { mode |= S_IRUSR; }
+   if (permissions[1] == 'w') { mode |= S_IWUSR; }
+   if (permissions[2] == 'x') { mode |= S_IXUSR; }
+   if (permissions[3] == 'r') { mode |= S_IRGRP; }
+   if (permissions[4] == 'w') { mode |= S_IWGRP; }
+   if (permissions[5] == 'x') { mode |= S_IXGRP; }
+   if (permissions[6] == 'r') { mode |= S_IROTH; }
+   if (permissions[7] == 'w') { mode |= S_IWOTH; }
+   if (permissions[8] == 'x') { mode |= S_IXOTH; }
+
+   int err = chmod(filename, mode);
+
+   if (err == 0) {
+      lua_pushboolean(L, 1);
+      return 1;
+   }
+
+   lua_pushboolean(L, 0);
+   lua_pushstring(L, strerror(errno));
+   return 2;
+}
+
+static int miniposix_umask(lua_State* L) {
+   mode_t mode = umask(0);
+   mode = umask(mode);
+
+   lua_pushinteger(L, mode);
+   return 1;
+}
+
+static int miniposix_getpwuid(lua_State* L) {
+   const char* filename = luaL_checkstring(L, 1);
+
+   struct passwd* data = getpwnam(filename);
+
+   if (!data) {
+      lua_pushboolean(L, 0);
+      lua_pushstring(L, strerror(errno));
+      return 2;
+   }
+
+   lua_newtable(L);
+   lua_pushstring(L, data->pw_name);
+   lua_setfield(L, -2, "pw_name");
+
+   return 1;
+}
+
+static int miniposix_geteuid(lua_State* L) {
+   lua_pushinteger(L, geteuid());
+   return 1;
+}
+
+static int miniposix_mkdtemp(lua_State* L) {
+   char* template = strdup(luaL_checkstring(L, 1));
+
+   char* updated = mkdtemp(template);
+
+   if (!updated) {
+      free(template);
+      lua_pushboolean(L, 0);
+      lua_pushstring(L, strerror(errno));
+      return 2;
+   }
+
+   lua_pushstring(L, updated);
+   free(updated);
+   return 1;
+}
+
+static struct luaL_Reg miniposix_lib[] = {
+   {"chmod",  miniposix_chmod},
+   {"umask", miniposix_umask},
+   {"getpwuid", miniposix_getpwuid},
+   {"geteuid", miniposix_geteuid},
+   {"mkdtemp", miniposix_mkdtemp},
+   {NULL, NULL}
+};
+
+int luaopen_miniposix(lua_State* L) {
+   lua_newtable(L);
+   luaL_setfuncs(L, miniposix_lib, 0);
+   return 1;
+}
+
-- 
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