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/*
terminatorX - realtime audio scratching software
Copyright (C) 1999-2011 Alexander König
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
File: tX_capabilities.cc
Description: Aquire CAP_SYS_NICE through Linux' capabilities.
*/
#include "tX_capabilities.h"
#include "tX_global.h"
#include <errno.h>
#include <string.h>
#ifdef USE_CAPABILITIES
bool have_nice_capability()
{
cap_t caps;
cap_flag_value_t cap;
caps=cap_get_proc();
if (!caps) {
tX_error("have_nice_capability(): failed to get caps: %s.", strerror(errno));
return false;
}
cap_get_flag(caps, CAP_SYS_NICE, CAP_EFFECTIVE, &cap);
if (cap==CAP_CLEAR) {
return false;
}
return true;
}
void set_nice_capability(cap_flag_t cap_flag) {
cap_t caps;
const unsigned caps_size = 1;
cap_value_t cap_list[] = { CAP_SYS_NICE };
caps=cap_get_proc();
if (!caps) {
tX_error("set_capabilities(): failed to get caps: %s.", strerror(errno));
return;
}
cap_set_flag(caps, cap_flag, caps_size, cap_list , CAP_SET);
if (cap_set_proc(caps)) {
tX_error("set_capabilities(): failed to set caps: %s.", strerror(errno));
}
}
#endif // USE_CAPABILITIES
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