| 1 | /* Create a temporary file or directory.
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| 2 |
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| 3 | Copyright (C) 2006, 2009-2016 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 3 of the License, or
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| 8 | (at your option) any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | /* header written by Eric Blake */
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| 19 |
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| 20 | #ifndef GL_TEMPNAME_H
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| 21 | # define GL_TEMPNAME_H
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| 22 |
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| 23 | # include <stdio.h>
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| 24 |
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| 25 | # ifdef __GT_FILE
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| 26 | # define GT_FILE __GT_FILE
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| 27 | # define GT_DIR __GT_DIR
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| 28 | # define GT_NOCREATE __GT_NOCREATE
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| 29 | # else
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| 30 | # define GT_FILE 0
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| 31 | # define GT_DIR 1
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| 32 | # define GT_NOCREATE 2
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| 33 | # endif
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| 34 |
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| 35 | #ifdef __cplusplus
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| 36 | extern "C" {
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| 37 | #endif
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| 38 |
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| 39 | /* Generate a temporary file name based on TMPL. TMPL must match the
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| 40 | rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
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| 41 | The name constructed does not exist at the time of the call to
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| 42 | gen_tempname. TMPL is overwritten with the result.
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| 43 |
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| 44 | KIND may be one of:
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| 45 | GT_NOCREATE: simply verify that the name does not exist
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| 46 | at the time of the call.
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| 47 | GT_FILE: create a large file using open(O_CREAT|O_EXCL)
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| 48 | and return a read-write fd. The file is mode 0600.
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| 49 | GT_DIR: create a directory, which will be mode 0700.
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| 50 |
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| 51 | We use a clever algorithm to get hard-to-predict names. */
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| 52 | extern int gen_tempname (char *tmpl, int suffixlen, int flags, int kind);
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| 53 | extern int gen_tempname_len (char *tmpl, int suffixlen, int flags, int kind,
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| 54 | size_t x_suffix_len);
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| 55 |
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| 56 | /* Similar to gen_tempname, but TRYFUNC is called for each temporary
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| 57 | name to try. If TRYFUNC returns a non-negative number, TRY_GEN_TEMPNAME
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| 58 | returns with this value. Otherwise, if errno is set to EEXIST, another
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| 59 | name is tried, or else TRY_GEN_TEMPNAME returns -1. */
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| 60 | extern int try_tempname (char *tmpl, int suffixlen, void *args,
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| 61 | int (*tryfunc) (char *, void *));
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| 62 | extern int try_tempname_len (char *tmpl, int suffixlen, void *args,
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| 63 | int (*tryfunc) (char *, void *),
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| 64 | size_t x_suffix_len);
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| 65 |
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| 66 | #ifdef __cplusplus
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| 67 | }
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| 68 | #endif
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| 69 |
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| 70 | #endif /* GL_TEMPNAME_H */
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