/* Create a temporary file or directory.

   Copyright (C) 2006, 2009-2017 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License

   along with this program.  If not, see <http://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 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 *));

#ifdef __cplusplus

}

#endif

#endif /* GL_TEMPNAME_H */