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qemu: Convert virExec usage to virCommand

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v2:
    Have virCommand cleanup intermediate process for us

v3:
    Preserve original FD closing behavior

Signed-off-by: Cole Robinson <crobinso@redhat.com>
This commit is contained in:
Cole Robinson 2011-05-06 16:10:40 -04:00
parent 0068b58c71
commit 1ba75cf9aa
2 changed files with 13 additions and 15 deletions
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26
src/qemu/qemu_driver.c
View File

@ -3298,11 +3298,9 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
int ret = -1;
virDomainEventPtr event;
int intermediatefd = -1;
pid_t intermediate_pid = -1;
int childstat;
virCommandPtr cmd = NULL;
if (header->version == 2) {
const char *intermediate_argv[3] = { NULL, "-dc", NULL };
const char *prog = qemudSaveCompressionTypeToString(header->compressed);
if (prog == NULL) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
@ -3312,14 +3310,17 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
}
if (header->compressed != QEMUD_SAVE_FORMAT_RAW) {
intermediate_argv[0] = prog;
cmd = virCommandNewArgList(prog, "-dc", NULL);
intermediatefd = *fd;
*fd = -1;
if (virExec(intermediate_argv, NULL, NULL,
&intermediate_pid, intermediatefd, fd, NULL, 0) < 0) {
virCommandSetInputFD(cmd, intermediatefd);
virCommandSetOutputFD(cmd, fd);
if (virCommandRunAsync(cmd, NULL) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to start decompression binary %s"),
intermediate_argv[0]);
prog);
*fd = intermediatefd;
goto out;
}
@ -3330,7 +3331,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
ret = qemuProcessStart(conn, driver, vm, "stdio", true, *fd, path,
VIR_VM_OP_RESTORE);
if (intermediate_pid != -1) {
if (intermediatefd != -1) {
if (ret < 0) {
/* if there was an error setting up qemu, the intermediate
* process will wait forever to write to stdout, so we
@ -3338,14 +3339,10 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
*/
VIR_FORCE_CLOSE(intermediatefd);
VIR_FORCE_CLOSE(*fd);
kill(intermediate_pid, SIGTERM);
}
/* Wait for intermediate process to exit */
while (waitpid(intermediate_pid, &childstat, 0) == -1 &&
errno == EINTR) {
/* empty */
}
if (virCommandWait(cmd, NULL) < 0)
ret = -1;
}
VIR_FORCE_CLOSE(intermediatefd);
@ -3385,6 +3382,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
ret = 0;
out:
virCommandFree(cmd);
if (virSecurityManagerRestoreSavedStateLabel(driver->securityManager,
vm, path) < 0)
VIR_WARN("failed to restore save state label on %s", path);

2
src/qemu/qemu_process.c
View File

@ -2378,7 +2378,7 @@ int qemuProcessStart(virConnectPtr conn,
* because the child no longer exists.
*/
/* The virExec process that launches the daemon failed. Pending on
/* The virCommand process that launches the daemon failed. Pending on
* when it failed (we can't determine for sure), there may be
* extra info in the domain log (if the hook failed for example).
*