etc.c: try confstr on Mac OS X

* ext/etc/etc.c (etc_systmpdir): try user temporary directory by
  confstr() on Mac OS X.
  c.f. http://www.opensource.apple.com/source/ruby/ruby-104/patches/ext_etc_etc.c.diff

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 1 deletions

diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 0a70c27874..6560dd9461 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -640,7 +640,22 @@ etc_systmpdir(void)
     if (!len) return Qnil;
     tmpdir = rb_w32_conv_from_wchar(path, rb_filesystem_encoding());
 #else
-    tmpdir = rb_filesystem_str_new_cstr("/tmp");
+    const char default_tmp[] = "/tmp";
+    const char *tmpstr = default_tmp;
+    size_t tmplen = 0;
+# if defined _CS_DARWIN_USER_TEMP_DIR
+    #ifndef MAXPATHLEN
+    #define MAXPATHLEN 1024
+    #endif
+    char path[MAXPATHLEN];
+    size_t len;
+    len = confstr(_CS_DARWIN_USER_TEMP_DIR, path, sizeof(path));
+    if (len > 0) {
+	tmpstr = path;
+	tmplen = len - 1;
+    }
+# endif
+    tmpdir = rb_filesystem_str_new(tmpstr, tmplen);
 #endif
     FL_UNSET(tmpdir, FL_TAINT);
     return tmpdir;