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/* Create a temporary file or directory.
Copyright (C) 2006, 2009-2021 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 */
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