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From 9bf536ecc296516cb5d82d5e9630663aaac56629 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Mon, 13 Mar 2017 17:46:24 +0100
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Subject: [PATCH 13/24] qemu-io: Add sigraise command
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <20170313174629.28735-2-mreitz@redhat.com>
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Patchwork-id: 74275
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O-Subject: [RHEL-7.4 qemu-kvm PATCH 4/9] qemu-io: Add sigraise command
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Bugzilla: 1427176
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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abort() has the sometimes undesirable side-effect of generating a core
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dump. If that is not needed, SIGKILL has the same effect of abruptly
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crash qemu; without a core dump.
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Thus, -c abort is not always useful to simulate a qemu-io crash;
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therefore, this patch adds a new sigraise command which allows raising
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a signal.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Reviewed-by: Fam Zheng <famz@redhat.com>
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Message-id: 1418032092-16813-2-git-send-email-mreitz@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 0e82dc7bbd96f9b0fb76e5fe263ba04b15e68127)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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qemu-io-cmds.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 46 insertions(+)
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diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
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index b41d6ee..010f05f 100644
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--- a/qemu-io-cmds.c
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+++ b/qemu-io-cmds.c
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@@ -2050,6 +2050,51 @@ static const cmdinfo_t abort_cmd = {
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.oneline = "simulate a program crash using abort(3)",
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};
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+static void sigraise_help(void)
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+{
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+ printf(
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+"\n"
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+" raises the given signal\n"
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+"\n"
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+" Example:\n"
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+" 'sigraise %i' - raises SIGTERM\n"
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+"\n"
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+" Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
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+" given to sigraise.\n"
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+"\n", SIGTERM);
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+}
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+
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+static int sigraise_f(BlockDriverState *bs, int argc, char **argv);
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+
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+static const cmdinfo_t sigraise_cmd = {
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+ .name = "sigraise",
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+ .cfunc = sigraise_f,
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+ .argmin = 1,
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+ .argmax = 1,
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+ .flags = CMD_NOFILE_OK,
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+ .args = "signal",
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+ .oneline = "raises a signal",
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+ .help = sigraise_help,
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+};
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+
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+static int sigraise_f(BlockDriverState *bs, int argc, char **argv)
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+{
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+ int sig = cvtnum(argv[1]);
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+ if (sig < 0) {
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+ printf("non-numeric signal number argument -- %s\n", argv[1]);
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+ return 0;
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+ }
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+
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+ /* Using raise() to kill this process does not necessarily flush all open
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+ * streams. At least stdout and stderr (although the latter should be
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+ * non-buffered anyway) should be flushed, though. */
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+ fflush(stdout);
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+ fflush(stderr);
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+
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+ raise(sig);
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+ return 0;
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+}
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+
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static void sleep_cb(void *opaque)
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{
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bool *expired = opaque;
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@@ -2203,4 +2248,5 @@ static void __attribute((constructor)) init_qemuio_commands(void)
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qemuio_add_command(&wait_break_cmd);
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qemuio_add_command(&abort_cmd);
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qemuio_add_command(&sleep_cmd);
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+ qemuio_add_command(&sigraise_cmd);
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}
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--
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1.8.3.1
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