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/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
*
* 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/>.
*/
#ifdef __linux__
#define _GNU_SOURCE
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define NO_READPASSPHRASE_H
#define RPP_STDIN 1
static inline char *
readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags) {
if (flags) {
if (!fgets(buf, bufsiz, stdin)) return NULL;
return strsep(&buf, "\n");
}
return getpass(prompt);
}
typedef int _readfn(void *, char *, int);
typedef int _writefn(void *, const char *, int);
typedef fpos_t _seekfn(void *, fpos_t, int);
typedef int _closefn(void *);
struct _funopen {
void *cookie;
_readfn *readfn;
_writefn *writefn;
_closefn *closefn;
};
static inline ssize_t
_cookie_read(void *cookie, char *buf, size_t size) {
struct _funopen *funopen = cookie;
assert((size_t)(int)size == size);
return funopen->readfn(funopen->cookie, buf, size);
}
static inline ssize_t
_cookie_write(void *cookie, const char *buf, size_t size) {
struct _funopen *funopen = cookie;
assert((size_t)(int)size == size);
return funopen->writefn(funopen->cookie, buf, size);
}
static inline int
_cookie_close(void *cookie) {
struct _funopen *funopen = cookie;
int ret = (funopen->closefn ? funopen->closefn(funopen->cookie) : 0);
free(cookie);
return ret;
}
static const cookie_io_functions_t _cookie_fns = {
.read = _cookie_read,
.write = _cookie_write,
.close = _cookie_close,
};
static inline FILE *
funopen(
const void *cookie,
_readfn *readfn, _writefn *writefn, _seekfn *seekfn, _closefn *closefn
) {
struct _funopen *funopen = malloc(sizeof(*funopen));
if (!funopen) return NULL;
assert(!seekfn);
*funopen = (struct _funopen) { (void *)cookie, readfn, writefn, closefn };
const char *mode = (!readfn ? "w" : !writefn ? "r" : "r+");
return fopencookie(funopen, mode, _cookie_fns);
}
#endif /* __linux__ */
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