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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <qrencode.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "alloc-util.h"
#include "dlfcn-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "journal-qrcode.h"
#include "locale-util.h"
#include "macro.h"
#include "qrcode-util.h"
#include "terminal-util.h"
int print_qr_code(
FILE *output,
const char *prefix_text,
const void *seed,
size_t seed_size,
uint64_t start,
uint64_t interval,
const char *hn,
sd_id128_t machine) {
QRcode* (*sym_QRcode_encodeString)(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive);
void (*sym_QRcode_free)(QRcode *qrcode);
_cleanup_(dlclosep) void *dl = NULL;
_cleanup_free_ char *url = NULL;
_cleanup_fclose_ FILE *f = NULL;
size_t url_size = 0;
QRcode* qr;
int r;
assert(seed);
assert(seed_size > 0);
/* If this is not an UTF-8 system or ANSI colors aren't supported/disabled don't print any QR
* codes */
if (!is_locale_utf8() || !colors_enabled())
return -EOPNOTSUPP;
dl = dlopen("libqrencode.so.4", RTLD_LAZY);
if (!dl)
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"QRCODE support is not installed: %s", dlerror());
r = dlsym_many_and_warn(
dl,
LOG_DEBUG,
&sym_QRcode_encodeString, "QRcode_encodeString",
&sym_QRcode_free, "QRcode_free",
NULL);
if (r < 0)
return r;
f = open_memstream_unlocked(&url, &url_size);
if (!f)
return -ENOMEM;
fputs("fss://", f);
for (size_t i = 0; i < seed_size; i++) {
if (i > 0 && i % 3 == 0)
fputc('-', f);
fprintf(f, "%02x", ((uint8_t*) seed)[i]);
}
fprintf(f, "/%"PRIx64"-%"PRIx64"?machine=" SD_ID128_FORMAT_STR,
start,
interval,
SD_ID128_FORMAT_VAL(machine));
if (hn)
fprintf(f, ";hostname=%s", hn);
r = fflush_and_check(f);
if (r < 0)
return r;
f = safe_fclose(f);
qr = sym_QRcode_encodeString(url, 0, QR_ECLEVEL_L, QR_MODE_8, 1);
if (!qr)
return -ENOMEM;
if (prefix_text)
fputs(prefix_text, output);
write_qrcode(output, qr);
sym_QRcode_free(qr);
return 0;
}
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