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0f46bf659f
On emscripten, some implementations in os-posix.c can't be used such as daemonizing and changing user. This commit introduces os-wasm.c and os-wasm.h which are forked from os-posix.c and os-posix.h and patched for targetting Emscripten. Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com> Link: https://lore.kernel.org/r/9fc7b106ecf86675b4532bd6778b7b5945442f89.1745820062.git.ktokunaga.mail@gmail.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* os-wasm.c
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* Forked from os-posix.c, removing functions not working on Emscripten
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2010 Red Hat, Inc.
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*
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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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*
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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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*
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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
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* THE 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 "qemu/osdep.h"
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include <pwd.h>
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#include <grp.h>
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#include <libgen.h>
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#include "qemu/error-report.h"
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#include "qemu/log.h"
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#include "system/runstate.h"
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#include "qemu/cutils.h"
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void os_setup_post(void){}
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void os_set_line_buffering(void)
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{
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setvbuf(stdout, NULL, _IOLBF, 0);
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}
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void os_setup_early_signal_handling(void)
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{
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struct sigaction act;
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sigfillset(&act.sa_mask);
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act.sa_flags = 0;
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act.sa_handler = SIG_IGN;
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sigaction(SIGPIPE, &act, NULL);
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}
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void os_set_proc_name(const char *s)
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{
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error_report("Change of process name not supported by your OS");
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exit(1);
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}
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static void termsig_handler(int signal, siginfo_t *info, void *c)
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{
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qemu_system_killed(info->si_signo, info->si_pid);
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}
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void os_setup_signal_handling(void)
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{
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struct sigaction act;
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memset(&act, 0, sizeof(act));
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act.sa_sigaction = termsig_handler;
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act.sa_flags = SA_SIGINFO;
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGHUP, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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}
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void os_setup_limits(void)
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{
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struct rlimit nofile;
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if (getrlimit(RLIMIT_NOFILE, &nofile) < 0) {
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warn_report("unable to query NOFILE limit: %s", strerror(errno));
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return;
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}
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if (nofile.rlim_cur == nofile.rlim_max) {
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return;
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}
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nofile.rlim_cur = nofile.rlim_max;
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if (setrlimit(RLIMIT_NOFILE, &nofile) < 0) {
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warn_report("unable to set NOFILE limit: %s", strerror(errno));
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return;
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}
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}
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int os_mlock(bool on_fault)
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{
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#ifdef HAVE_MLOCKALL
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int ret = 0;
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int flags = MCL_CURRENT | MCL_FUTURE;
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if (on_fault) {
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#ifdef HAVE_MLOCK_ONFAULT
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flags |= MCL_ONFAULT;
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#else
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error_report("mlockall: on_fault not supported");
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return -EINVAL;
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#endif
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}
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ret = mlockall(flags);
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if (ret < 0) {
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error_report("mlockall: %s", strerror(errno));
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}
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return ret;
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#else
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(void)on_fault;
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return -ENOSYS;
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#endif
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}
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