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61a29eca55
Some logging operations require access to external resources to complete. Logging to F_WALL requires on-demand access to the user accounting database. Logging to F_CONSOLE requires access to the console. Logging to F_PIPE prompts execution of a command outside of capability mode. These operations cannot be performed in capability mode, so the "p_open", "ttymsg", and "wallmsg" commands may be sent to libcasper to circumvent these limitations. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D41465
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2023 The FreeBSD Foundation
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*
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* This software was developed by Jake Freeland <jfree@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <libcasper.h>
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#include <string.h>
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#include <casper/cap_net.h>
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#include "syslogd_cap.h"
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/* This is where libcasper receives commands via nvlist. */
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static int
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casper_command(const char *cmd, const nvlist_t *limits __unused,
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nvlist_t *nvlin, nvlist_t *nvlout)
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{
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int error = EINVAL;
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if (strcmp(cmd, "p_open") == 0)
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error = casper_p_open(nvlin, nvlout);
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else if (strcmp(cmd, "readconfigfile") == 0)
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error = casper_readconfigfile(nvlin, nvlout);
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else if (strcmp(cmd, "ttymsg") == 0)
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error = casper_ttymsg(nvlin, nvlout);
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else if (strcmp(cmd, "wallmsg") == 0)
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error = casper_wallmsg(nvlin);
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return (error);
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}
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CREATE_SERVICE("syslogd.casper", NULL, casper_command, CASPER_SERVICE_STDIO);
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