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[Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command |
Date: |
Thu, 4 Dec 2014 15:49:00 +0100 |
abort() has the sometimes undesirable side-effect of generating a core
dump. If that is not needed, SIGKILL has the same effect of abruptly
crash qemu; without a core dump.
Thus, -c abort is not always useful to simulate a qemu-io crash;
therefore, this patch adds a new sigraise command which allows to raise
any Unix signal.
Signed-off-by: Max Reitz <address@hidden>
---
qemu-io-cmds.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index d94fb1e..942b694 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -2048,6 +2048,51 @@ static const cmdinfo_t abort_cmd = {
.oneline = "simulate a program crash using abort(3)",
};
+static void sigraise_help(void)
+{
+ printf(
+"\n"
+" raises the given Unix signal\n"
+"\n"
+" Example:\n"
+" 'sigraise 9' - raises SIGKILL\n"
+"\n"
+" Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
+" given to sigraise.\n"
+"\n");
+}
+
+static int sigraise_f(BlockDriverState *bs, int argc, char **argv);
+
+static const cmdinfo_t sigraise_cmd = {
+ .name = "sigraise",
+ .cfunc = sigraise_f,
+ .argmin = 1,
+ .argmax = 1,
+ .flags = CMD_NOFILE_OK,
+ .args = "signal",
+ .oneline = "raises a Unix signal",
+ .help = sigraise_help,
+};
+
+static int sigraise_f(BlockDriverState *bs, int argc, char **argv)
+{
+ int sig = cvtnum(argv[1]);
+ if (sig < 0) {
+ printf("non-numeric signal number argument -- %s\n", argv[1]);
+ return 0;
+ }
+
+ /* Using raise() to kill this process does not necessarily flush all open
+ * streams. At least stdout and stderr (although the latter should be
+ * non-buffered anyway) should be flushed, though. */
+ fflush(stdout);
+ fflush(stderr);
+
+ raise(sig);
+ return 0;
+}
+
static void sleep_cb(void *opaque)
{
bool *expired = opaque;
@@ -2202,4 +2247,5 @@ static void __attribute((constructor))
init_qemuio_commands(void)
qemuio_add_command(&wait_break_cmd);
qemuio_add_command(&abort_cmd);
qemuio_add_command(&sleep_cmd);
+ qemuio_add_command(&sigraise_cmd);
}
--
1.9.3
- [Qemu-devel] [PATCH v2 0/3] iotests: Fix test 039, Max Reitz, 2014/12/04
- [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command,
Max Reitz <=
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Fam Zheng, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Markus Armbruster, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Max Reitz, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Markus Armbruster, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Kevin Wolf, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Max Reitz, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Markus Armbruster, 2014/12/05
- Re: [Qemu-devel] [PATCH v2 1/3] qemu-io: Add sigraise command, Eric Blake, 2014/12/05
[Qemu-devel] [PATCH v2 3/3] iotests: Fix test 039, Max Reitz, 2014/12/04