Chris Freehill
5cc498c6aa
The rdc account will be created on installation if it does not already exist. It will be a system account with no home directory. rdcd will be started as a systemd service, but change to user "rdc". The rdc user will drop all priviliges except CAP_DAC_OVERRIDE, permitted. This means the default mode will have no special privileges, but have the ability to gain write access (e.g., to sysfs) when needed. rdc tests were being inadvertantly added to the installation. This was adversely impacting the new functionality, so it was corrected in this commit. Also included are a few small formatting changes. Change-Id: I9c6bb132fee28119fd3960594dfb97bd2e7b282a
90 lines
2.4 KiB
C++
Executable File
90 lines
2.4 KiB
C++
Executable File
/*
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Copyright (c) 2020 - present Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include <sys/capability.h>
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#include <errno.h>
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#include <assert.h>
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int GetCapability(cap_value_t cap, cap_flag_t cap_type, bool *enabled) {
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cap_t caps;
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assert(enabled != nullptr);
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if (enabled == nullptr) {
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return -1;
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}
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// Get process's current capabilities
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caps = cap_get_proc();
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if (caps == nullptr) {
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return errno;
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}
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cap_flag_value_t val;
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if (cap_get_flag(caps, cap, cap_type, &val) == -1) {
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int ret = errno;
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cap_free(caps);
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return ret;
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}
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if (cap_free(caps) == -1) {
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return errno;
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}
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*enabled = (val == CAP_SET ? true : false);
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return 0;
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}
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// !enable means disable;
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int ModifyCapability(cap_value_t cap, cap_flag_t cap_type, bool enable) {
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cap_t caps;
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cap_value_t cap_list[1];
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// Get process's current capabilities
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caps = cap_get_proc();
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if (caps == nullptr) {
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return errno;
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}
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// the 1 in the call below is the size of the cap_list array
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cap_list[0] = cap;
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if (cap_set_flag(caps, cap_type, 1, cap_list, enable ? CAP_SET : CAP_CLEAR)
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== -1) {
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int ret = errno;
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cap_free(caps);
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return ret;
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}
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if (cap_set_proc(caps) == -1) {
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int ret = errno;
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cap_free(caps);
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return ret;
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}
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if (cap_free(caps) == -1) {
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return errno;
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}
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return 0;
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}
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