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+/* Create a temporary file or directory.
+
+ Copyright (C) 2006, 2009-2020 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* header written by Eric Blake */
+
+#ifndef GL_TEMPNAME_H
+# define GL_TEMPNAME_H
+
+# include <stdio.h>
+
+# ifdef __GT_FILE
+# define GT_FILE __GT_FILE
+# define GT_DIR __GT_DIR
+# define GT_NOCREATE __GT_NOCREATE
+# else
+# define GT_FILE 0
+# define GT_DIR 1
+# define GT_NOCREATE 2
+# endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Generate a temporary file name based on TMPL. TMPL must match the
+ rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
+ The name constructed does not exist at the time of the call to
+ gen_tempname. TMPL is overwritten with the result.
+
+ KIND may be one of:
+ GT_NOCREATE: simply verify that the name does not exist
+ at the time of the call.
+ GT_FILE: create a large file using open(O_CREAT|O_EXCL)
+ and return a read-write fd. The file is mode 0600.
+ GT_DIR: create a directory, which will be mode 0700.
+
+ We use a clever algorithm to get hard-to-predict names. */
+extern int gen_tempname (char *tmpl, int suffixlen, int flags, int kind);
+/* Similar, except X_SUFFIX_LEN gives the number of Xs. */
+extern int gen_tempname_len (char *tmpl, int suffixlen, int flags, int kind,
+ size_t x_suffix_len);
+
+/* Similar to gen_tempname, but TRYFUNC is called for each temporary
+ name to try. If TRYFUNC returns a non-negative number, TRY_GEN_TEMPNAME
+ returns with this value. Otherwise, if errno is set to EEXIST, another
+ name is tried, or else TRY_GEN_TEMPNAME returns -1. */
+extern int try_tempname (char *tmpl, int suffixlen, void *args,
+ int (*tryfunc) (char *, void *));
+/* Similar, except X_SUFFIX_LEN gives the number of Xs. */
+extern int try_tempname_len (char *tmpl, int suffixlen, void *args,
+ int (*tryfunc) (char *, void *),
+ size_t x_suffix_len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GL_TEMPNAME_H */