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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* selinux.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "mkfs.h"
#define XATTR_NAME_SELINUX "security.selinux"
#define XATTR_VALUE_SELINUX "system_u:object_r:unlabeled_t:s0"
#ifdef WITH_SELINUX
int selinux_relable_node(void *sehnd, sqfs_xattr_writer_t *xwr,
tree_node_t *node, const char *path)
{
char *context = NULL;
int ret;
if (selabel_lookup(sehnd, &context, path, node->mode) < 0) {
context = strdup(XATTR_VALUE_SELINUX);
if (context == NULL)
goto fail;
}
ret = sqfs_xattr_writer_add(xwr, XATTR_NAME_SELINUX,
context, strlen(context));
free(context);
if (ret)
sqfs_perror(node->name, "storing SELinux xattr", ret);
return ret;
fail:
perror("relabeling files");
return -1;
}
void *selinux_open_context_file(const char *filename)
{
struct selabel_handle *sehnd;
struct selinux_opt seopts[] = {
{ SELABEL_OPT_PATH, filename },
};
sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1);
if (sehnd == NULL)
perror(filename);
return sehnd;
}
void selinux_close_context_file(void *sehnd)
{
selabel_close(sehnd);
}
#else
int selinux_relable_node(void *sehnd, sqfs_xattr_writer_t *xwr,
tree_node_t *node, const char *path)
{
(void)sehnd; (void)xwr; (void)node; (void)path;
fputs("Built without SELinux support, cannot add SELinux labels\n",
stderr);
return -1;
}
void *selinux_open_context_file(const char *filename)
{
(void)filename;
fputs("Built without SELinux support, cannot open contexts file\n",
stderr);
return NULL;
}
void selinux_close_context_file(void *sehnd)
{
(void)sehnd;
}
#endif
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