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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* This file is part of libmount from util-linux project.
*
* Copyright (C) 2008-2018 Karel Zak <kzak@redhat.com>
*
* libmount is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*/
/**
* SECTION: init
* @title: Library initialization
* @short_description: initialize debugging
*/
#include <stdarg.h>
#include "mountP.h"
UL_DEBUG_DEFINE_MASK(libmount);
UL_DEBUG_DEFINE_MASKNAMES(libmount) =
{
{ "all", MNT_DEBUG_ALL, "info about all subsystems" },
{ "cache", MNT_DEBUG_CACHE, "paths and tags cache" },
{ "cxt", MNT_DEBUG_CXT, "library context (handler)" },
{ "diff", MNT_DEBUG_DIFF, "mountinfo changes tracking" },
{ "fs", MNT_DEBUG_FS, "FS abstraction" },
{ "help", MNT_DEBUG_HELP, "this help" },
{ "hook", MNT_DEBUG_HOOK, "hooks functionality" },
{ "locks", MNT_DEBUG_LOCKS, "mtab and utab locking" },
{ "loop", MNT_DEBUG_LOOP, "loop devices routines" },
{ "options", MNT_DEBUG_OPTIONS, "mount options parsing" },
{ "optlist", MNT_DEBUG_OPTLIST, "mount options container" },
{ "tab", MNT_DEBUG_TAB, "fstab, mtab, mountinfo routines" },
{ "update", MNT_DEBUG_UPDATE, "mtab, utab updates" },
{ "utils", MNT_DEBUG_UTILS, "misc library utils" },
{ "monitor", MNT_DEBUG_MONITOR, "mount tables monitor" },
{ "btrfs", MNT_DEBUG_BTRFS, "btrfs specific routines" },
{ "verity", MNT_DEBUG_VERITY, "verity specific routines" },
{ NULL, 0 }
};
/**
* mnt_init_debug:
* @mask: debug mask (0xffff to enable full debugging)
*
* If the @mask is not specified, then this function reads
* the LIBMOUNT_DEBUG environment variable to get the mask.
*
* Already initialized debugging stuff cannot be changed. Calling
* this function twice has no effect.
*/
void mnt_init_debug(int mask)
{
if (libmount_debug_mask)
return;
__UL_INIT_DEBUG_FROM_ENV(libmount, MNT_DEBUG_, mask, LIBMOUNT_DEBUG);
if (libmount_debug_mask != MNT_DEBUG_INIT
&& libmount_debug_mask != (MNT_DEBUG_HELP|MNT_DEBUG_INIT)) {
const char *ver = NULL;
const char **features = NULL, **p;
mnt_get_library_version(&ver);
mnt_get_library_features(&features);
DBG(INIT, ul_debug("library debug mask: 0x%06x", libmount_debug_mask));
DBG(INIT, ul_debug("library version: %s", ver));
p = features;
while (p && *p)
DBG(INIT, ul_debug(" feature: %s", *p++));
}
ON_DBG(HELP, ul_debug_print_masks("LIBMOUNT_DEBUG",
UL_DEBUG_MASKNAMES(libmount)));
}
#ifdef TEST_PROGRAM
#include <errno.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
if (argc == 2) {
int mask;
errno = 0;
mask = strtoul(argv[1], 0, 0);
if (errno)
return 1;
mnt_init_debug(mask);
}
else if (argc == 1) {
mnt_init_debug(0);
} else
return 1;
return 0;
}
#endif /* TEST_PROGRAM */
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