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57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
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* libbb/selinux_common.c
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* -- common SELinux utility functions
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*
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* Copyright 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
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*
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include <selinux/context.h>
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context_t FAST_FUNC set_security_context_component(security_context_t cur_context,
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char *user, char *role, char *type, char *range)
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{
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context_t con = context_new(cur_context);
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if (!con)
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return NULL;
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if (user && context_user_set(con, user))
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goto error;
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if (type && context_type_set(con, type))
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goto error;
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if (range && context_range_set(con, range))
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goto error;
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if (role && context_role_set(con, role))
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goto error;
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return con;
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error:
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context_free(con);
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return NULL;
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}
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void FAST_FUNC setfscreatecon_or_die(security_context_t scontext)
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{
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if (setfscreatecon(scontext) < 0) {
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/* Can be NULL. All known printf implementations
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* display "(null)", "<null>" etc */
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bb_perror_msg_and_die("can't set default "
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"file creation context to %s", scontext);
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}
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}
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void FAST_FUNC selinux_preserve_fcontext(int fdesc)
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{
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security_context_t context;
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if (fgetfilecon(fdesc, &context) < 0) {
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if (errno == ENODATA || errno == ENOTSUP)
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return;
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bb_perror_msg_and_die("fgetfilecon failed");
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}
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setfscreatecon_or_die(context);
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freecon(context);
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}
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