X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/31b7c261a207e1e670d737ec78a87dd031bd8f73..eaab4d60d3ad908936564492862e8a84f5fa59b2:/os-posix.c

diff --git a/os-posix.c b/os-posix.c
index 7971f8620b..daf3d6f6f3 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -31,6 +31,7 @@
 /*needed for MAP_POPULATE before including qemu-options.h */
 #include <sys/mman.h>
 #include <pwd.h>
+#include <grp.h>
 #include <libgen.h>
 
 /* Needed early for CONFIG_BSD etc. */
@@ -41,11 +42,10 @@
 
 #ifdef CONFIG_LINUX
 #include <sys/prctl.h>
-#include <sys/syscall.h>
 #endif
 
-#ifdef CONFIG_EVENTFD
-#include <sys/eventfd.h>
+#ifdef __FreeBSD__
+#include <sys/sysctl.h>
 #endif
 
 static struct passwd *user_pwd;
@@ -62,14 +62,9 @@ void os_setup_early_signal_handling(void)
     sigaction(SIGPIPE, &act, NULL);
 }
 
-static void termsig_handler(int signal)
+static void termsig_handler(int signal, siginfo_t *info, void *c)
 {
-    qemu_system_shutdown_request();
-}
-
-static void sigchld_handler(int signal)
-{
-    waitpid(-1, NULL, WNOHANG);
+    qemu_system_killed(info->si_signo, info->si_pid);
 }
 
 void os_setup_signal_handling(void)
@@ -77,14 +72,11 @@ void os_setup_signal_handling(void)
     struct sigaction act;
 
     memset(&act, 0, sizeof(act));
-    act.sa_handler = termsig_handler;
+    act.sa_sigaction = termsig_handler;
+    act.sa_flags = SA_SIGINFO;
     sigaction(SIGINT,  &act, NULL);
     sigaction(SIGHUP,  &act, NULL);
     sigaction(SIGTERM, &act, NULL);
-
-    act.sa_handler = sigchld_handler;
-    act.sa_flags = SA_NOCLDSTOP;
-    sigaction(SIGCHLD, &act, NULL);
 }
 
 /* Find a likely location for support files using the location of the binary.
@@ -135,12 +127,12 @@ char *os_find_datadir(const char *argv0)
 
     max_len = strlen(dir) +
         MAX(strlen(SHARE_SUFFIX), strlen(BUILD_SUFFIX)) + 1;
-    res = qemu_mallocz(max_len);
+    res = g_malloc0(max_len);
     snprintf(res, max_len, "%s%s", dir, SHARE_SUFFIX);
     if (access(res, R_OK)) {
         snprintf(res, max_len, "%s%s", dir, BUILD_SUFFIX);
         if (access(res, R_OK)) {
-            qemu_free(res);
+            g_free(res);
             res = NULL;
         }
     }
@@ -207,6 +199,11 @@ static void change_process_uid(void)
             fprintf(stderr, "Failed to setgid(%d)\n", user_pwd->pw_gid);
             exit(1);
         }
+        if (initgroups(user_pwd->pw_name, user_pwd->pw_gid) < 0) {
+            fprintf(stderr, "Failed to initgroups(\"%s\", %d)\n",
+                    user_pwd->pw_name, user_pwd->pw_gid);
+            exit(1);
+        }
         if (setuid(user_pwd->pw_uid) < 0) {
             fprintf(stderr, "Failed to setuid(%d)\n", user_pwd->pw_uid);
             exit(1);
@@ -335,34 +332,6 @@ void os_set_line_buffering(void)
     setvbuf(stdout, NULL, _IOLBF, 0);
 }
 
-/*
- * Creates an eventfd that looks like a pipe and has EFD_CLOEXEC set.
- */
-int qemu_eventfd(int fds[2])
-{
-#ifdef CONFIG_EVENTFD
-    int ret;
-
-    ret = eventfd(0, 0);
-    if (ret >= 0) {
-        fds[0] = ret;
-        qemu_set_cloexec(ret);
-        if ((fds[1] = dup(ret)) == -1) {
-            close(ret);
-            return -1;
-        }
-        qemu_set_cloexec(fds[1]);
-        return 0;
-    }
-
-    if (errno != ENOSYS) {
-        return -1;
-    }
-#endif
-
-    return qemu_pipe(fds);
-}
-
 int qemu_create_pidfile(const char *filename)
 {
     char buffer[128];
@@ -374,21 +343,15 @@ int qemu_create_pidfile(const char *filename)
         return -1;
     }
     if (lockf(fd, F_TLOCK, 0) == -1) {
+        close(fd);
         return -1;
     }
-    len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
+    len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", getpid());
     if (write(fd, buffer, len) != len) {
+        close(fd);
         return -1;
     }
 
+    /* keep pidfile open & locked forever */
     return 0;
 }
-
-int qemu_get_thread_id(void)
-{
-#if defined (__linux__)
-    return syscall(SYS_gettid);
-#else
-    return getpid();
-#endif
-}