lib-nixio / luci-base: Fix for reading csrf token prevents file upload

[project/luci.git] / libs / luci-lib-nixio / src / file.c

diff --git a/libs/luci-lib-nixio/src/file.c b/libs/luci-lib-nixio/src/file.c
index b86e040..cfa35df 100644 (file)
--- a/libs/luci-lib-nixio/src/file.c
+++ b/libs/luci-lib-nixio/src/file.c
@@ -79,6 +79,38 @@ static int nixio_open(lua_State *L) {
        return 1;
 }
 
+static int nixio_mkstemp(lua_State *L) {
+       const char *intemplate = luaL_checklstring(L, 1, NULL);
+       size_t len = lua_strlen(L, 1);
+       char *template = (char *)lua_newuserdata(L, 13 + len);
+       if (!template) {
+               return luaL_error(L, "out of memory");
+       }
+       snprintf(template, 13 + len, "/tmp/%s.XXXXXX", intemplate);
+
+       int fd;
+
+       do {
+               fd = mkstemp(template);
+       } while (fd == -1 && errno == EINTR);
+       if (fd == -1) {
+               return nixio__perror(L);
+       }
+       unlink(template);
+
+       int *udata = lua_newuserdata(L, sizeof(int));
+       if (!udata) {
+               return luaL_error(L, "out of memory");
+       }
+
+       *udata = fd;
+
+       luaL_getmetatable(L, NIXIO_FILE_META);
+       lua_setmetatable(L, -2);
+
+       return 1;
+}
+
 static int nixio_open_flags(lua_State *L) {
        int mode = 0;
        const int j = lua_gettop(L);
@@ -366,6 +398,7 @@ static const luaL_reg R[] = {
        {"dup",                 nixio_dup},
        {"open",                nixio_open},
        {"open_flags",  nixio_open_flags},
+       {"mkstemp",             nixio_mkstemp},
        {"pipe",                nixio_pipe},
        {NULL,                  NULL}
 };