[Test] use TMPDIR if available for mkstemp tests

diff --git a/src/libutil/cxx/file_util.cxx b/src/libutil/cxx/file_util.cxx
index f457a4cd78b99ecfacbe936cd58bf72b0d6db448..e3b3a26050537bba8b1b94dfc58206f86eee80e0 100644 (file)
--- a/src/libutil/cxx/file_util.cxx
+++ b/src/libutil/cxx/file_util.cxx
@@ -368,13 +368,22 @@ TEST_CASE("check lock") {
        CHECK(serrno == ENOENT);
 }
 
+auto get_tmpdir() -> const char * {
+       const auto *tmpdir = getenv("TMPDIR");
+       if (tmpdir == nullptr) {
+               tmpdir = G_DIR_SEPARATOR_S "tmp";
+       }
+       return tmpdir;
+}
+
 TEST_CASE("tempfile") {
        std::string tmpname;
+       const std::string tmpdir{get_tmpdir()};
        {
-               auto raii_locked_file = raii_locked_file::mkstemp("/tmp//doctest-XXXXXXXX",
+               auto raii_locked_file = raii_locked_file::mkstemp(std::string(tmpdir + G_DIR_SEPARATOR_S + "doctest-XXXXXXXX").c_str(),
                                O_RDONLY, 00600);
                CHECK(raii_locked_file.has_value());
-               CHECK(raii_locked_file.value().get_dir() == "/tmp");
+               CHECK(raii_locked_file.value().get_dir() == tmpdir);
                CHECK(access(raii_locked_file.value().get_name().data(), R_OK) == 0);
                auto raii_locked_file2 = raii_locked_file::open(raii_locked_file.value().get_name().data(), O_RDONLY);
                CHECK(!raii_locked_file2.has_value());
@@ -390,11 +399,12 @@ TEST_CASE("tempfile") {
 
 TEST_CASE("mmap") {
        std::string tmpname;
+       const std::string tmpdir{get_tmpdir()};
        {
-               auto raii_file = raii_file::mkstemp("/tmp//doctest-XXXXXXXX",
+               auto raii_file = raii_file::mkstemp(std::string(tmpdir + G_DIR_SEPARATOR_S + "doctest-XXXXXXXX").c_str(),
                O_RDWR|O_CREAT|O_EXCL, 00600);
                CHECK(raii_file.has_value());
-               CHECK(raii_file->get_dir() == "/tmp");
+               CHECK(raii_file->get_dir() == tmpdir);
                CHECK(access(raii_file->get_name().data(), R_OK) == 0);
                tmpname = std::string{raii_file->get_name()};
                char payload[] = {'1', '2', '3'};