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/* SPDX-License-Identifier: MIT */
/*
* os-wasm.c
* Forked from os-posix.c, removing functions not working on Emscripten
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2010 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include <sys/resource.h>
#include <sys/wait.h>
#include <pwd.h>
#include <grp.h>
#include <libgen.h>
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "system/runstate.h"
#include "qemu/cutils.h"
void os_setup_post(void){}
void os_set_line_buffering(void)
{
setvbuf(stdout, NULL, _IOLBF, 0);
}
void os_setup_early_signal_handling(void)
{
struct sigaction act;
sigfillset(&act.sa_mask);
act.sa_flags = 0;
act.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &act, NULL);
}
void os_set_proc_name(const char *s)
{
error_report("Change of process name not supported by your OS");
exit(1);
}
static void termsig_handler(int signal, siginfo_t *info, void *c)
{
qemu_system_killed(info->si_signo, info->si_pid);
}
void os_setup_signal_handling(void)
{
struct sigaction act;
memset(&act, 0, sizeof(act));
act.sa_sigaction = termsig_handler;
act.sa_flags = SA_SIGINFO;
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGTERM, &act, NULL);
}
void os_setup_limits(void)
{
struct rlimit nofile;
if (getrlimit(RLIMIT_NOFILE, &nofile) < 0) {
warn_report("unable to query NOFILE limit: %s", strerror(errno));
return;
}
if (nofile.rlim_cur == nofile.rlim_max) {
return;
}
nofile.rlim_cur = nofile.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &nofile) < 0) {
warn_report("unable to set NOFILE limit: %s", strerror(errno));
return;
}
}
int os_mlock(bool on_fault)
{
#ifdef HAVE_MLOCKALL
int ret = 0;
int flags = MCL_CURRENT | MCL_FUTURE;
if (on_fault) {
#ifdef HAVE_MLOCK_ONFAULT
flags |= MCL_ONFAULT;
#else
error_report("mlockall: on_fault not supported");
return -EINVAL;
#endif
}
ret = mlockall(flags);
if (ret < 0) {
error_report("mlockall: %s", strerror(errno));
}
return ret;
#else
(void)on_fault;
return -ENOSYS;
#endif
}
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