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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* Test utility checking symbol versions in libcryptsetup.
*
* Copyright (C) 2021-2024 Red Hat, Inc. All rights reserved.
*/
#include <dlfcn.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define UNUSED(expr) do { (void)(expr); } while (0)
static int _debug;
static const char *libfile = "libcryptsetup.so.12";
#define LOG_MAX_LEN 256
#define LOG_DEBUG 1
#define LOG_NORMAL 2
#define LOG_ERROR 3
__attribute__((format(printf, 2, 3)))
static void test_logf(int level, const char *format, ...)
{
va_list argp;
char target[LOG_MAX_LEN + 2];
int len;
va_start(argp, format);
len = vsnprintf(&target[0], LOG_MAX_LEN, format, argp);
if (len > 0 && len < LOG_MAX_LEN) {
switch (level) {
case LOG_DEBUG:
if (!_debug)
break;
/* fall through */
case LOG_NORMAL:
fprintf(stdout, "%s", target);
break;
case LOG_ERROR:
fflush(stdout);
strcat(target, "\n");
fprintf(stderr, "%s", target);
}
}
va_end(argp);
}
#define log_dbg(x...) test_logf(LOG_DEBUG, x)
#define log_std(x...) test_logf(LOG_NORMAL, x)
#define log_err(x...) test_logf(LOG_ERROR, x)
static int check_dlvsym(void *h, const char *symbol, const char *version)
{
#ifdef HAVE_DLVSYM
void *sym;
char *err;
log_dbg("Checking %s@%s...", symbol, version);
sym = dlvsym(h, symbol, version);
UNUSED(sym);
err = dlerror();
if (err) {
log_err("%s.", err);
return 1;
}
log_dbg("OK\n");
#else
UNUSED(h);
UNUSED(symbol);
UNUSED(version);
#endif
return 0;
}
static int check_dlsym(void *h, const char *symbol)
{
void *sym;
char *err;
log_dbg("Checking %s...", symbol);
sym = dlsym(h, symbol);
UNUSED(sym);
err = dlerror();
if (err) {
log_err("%s", err);
return 1;
}
log_dbg("OK\n");
return 0;
}
static int check_all_symbols(void *h)
{
unsigned scount = 0;
#define CHECK_SYMBOL(SYM, VER) \
do { \
if (check_dlvsym(h, #SYM, #VER)) \
return 1; \
if (check_dlsym(h, #SYM)) \
return 1; \
scount++; \
} while (0);
#include "test-symbols-list.h"
#undef CHECK_SYMBOL
if (!scount) {
log_err("test-symbols-list.h file is probably empty.");
return 1;
}
log_std("Performed %u symbol checks in total.\n", scount);
return 0;
}
static void usage(const char *app)
{
log_std("usage:\n\t%s [-v|--verbose|--debug] [optional path to library so file]\n", app);
exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
int i, r;
void *h;
for (i = 1; i < argc; i++) {
if (*argv[i] != '-')
libfile = argv[i];
else if (!strcmp("-v", argv[i]) || !strcmp("--verbose", argv[i]) ||
!strcmp("--debug", argv[i]))
_debug = 1;
else if (!strcmp("-h", argv[i]) || !strcmp("--help", argv[i]))
usage(argv[0]);
}
log_std("Checking dlopen(%s)...", libfile);
h = dlopen(libfile, RTLD_NOW);
if (!h) {
log_err("dlopen(): %s.", dlerror());
return EXIT_FAILURE;
}
dlerror();
log_std("OK\n");
r = check_all_symbols(h);
if (dlclose(h)) {
log_err("Failed to dlclose %s: %s.", libfile, dlerror());
return EXIT_FAILURE;
}
return r ? EXIT_FAILURE : EXIT_SUCCESS;
}
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