| /* 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 |
| } |