blockdev: qmp_transaction: drop extra generic layer

[mirror_qemu.git] / util / oslib-posix.c

diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 59a891b6a837bc4537d0d7d9e780e81a37b1ca34..760390b31e5f160933563b59af521531d8b95ad4 100644 (file)
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -40,7 +40,6 @@
 #include "qemu/thread.h"
 #include <libgen.h>
 #include "qemu/cutils.h"
-#include "qemu/compiler.h"
 #include "qemu/units.h"
 #include "qemu/thread-context.h"
 
@@ -50,7 +49,6 @@
 
 #ifdef __FreeBSD__
 #include <sys/thr.h>
-#include <sys/types.h>
 #include <sys/user.h>
 #include <libutil.h>
 #endif
@@ -61,10 +59,6 @@
 
 #include "qemu/mmap-alloc.h"
 
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#include "qemu/error-report.h"
-#endif
-
 #define MAX_MEM_PREALLOC_THREAD_COUNT 16
 
 struct MemsetThread;
@@ -589,76 +583,6 @@ char *qemu_get_pid_name(pid_t pid)
 }
 
 
-pid_t qemu_fork(Error **errp)
-{
-    sigset_t oldmask, newmask;
-    struct sigaction sig_action;
-    int saved_errno;
-    pid_t pid;
-
-    /*
-     * Need to block signals now, so that child process can safely
-     * kill off caller's signal handlers without a race.
-     */
-    sigfillset(&newmask);
-    if (pthread_sigmask(SIG_SETMASK, &newmask, &oldmask) != 0) {
-        error_setg_errno(errp, errno,
-                         "cannot block signals");
-        return -1;
-    }
-
-    pid = fork();
-    saved_errno = errno;
-
-    if (pid < 0) {
-        /* attempt to restore signal mask, but ignore failure, to
-         * avoid obscuring the fork failure */
-        (void)pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
-        error_setg_errno(errp, saved_errno,
-                         "cannot fork child process");
-        errno = saved_errno;
-        return -1;
-    } else if (pid) {
-        /* parent process */
-
-        /* Restore our original signal mask now that the child is
-         * safely running. Only documented failures are EFAULT (not
-         * possible, since we are using just-grabbed mask) or EINVAL
-         * (not possible, since we are using correct arguments).  */
-        (void)pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
-    } else {
-        /* child process */
-        size_t i;
-
-        /* Clear out all signal handlers from parent so nothing
-         * unexpected can happen in our child once we unblock
-         * signals */
-        sig_action.sa_handler = SIG_DFL;
-        sig_action.sa_flags = 0;
-        sigemptyset(&sig_action.sa_mask);
-
-        for (i = 1; i < NSIG; i++) {
-            /* Only possible errors are EFAULT or EINVAL The former
-             * won't happen, the latter we expect, so no need to check
-             * return value */
-            (void)sigaction(i, &sig_action, NULL);
-        }
-
-        /* Unmask all signals in child, since we've no idea what the
-         * caller's done with their signal mask and don't want to
-         * propagate that to children */
-        sigemptyset(&newmask);
-        if (pthread_sigmask(SIG_SETMASK, &newmask, NULL) != 0) {
-            Error *local_err = NULL;
-            error_setg_errno(&local_err, errno,
-                             "cannot unblock signals");
-            error_report_err(local_err);
-            _exit(1);
-        }
-    }
-    return pid;
-}
-
 void *qemu_alloc_stack(size_t *sz)
 {
     void *ptr, *guardpage;