#include "platform.h"
#include "gnunet_util_lib.h"
-#include <mpi.h>
+#include "gnunet_testbed_service.h"
+
/**
* Generic logging shorthand
*/
#define LOG(kind,...) \
- fprintf (stderr, __VA_ARGS__)
+ GNUNET_log (kind, __VA_ARGS__)
/**
* Debug logging shorthand
*/
static int ret;
+/**
+ * The child process we spawn
+ */
+static struct GNUNET_OS_Process *child;
+
+/**
+ * The arguments including the binary to spawn
+ */
+static char **argv2;
+
+/**
+ * Pipe used to communicate shutdown via signal.
+ */
+static struct GNUNET_DISK_PipeHandle *sigpipe;
+
+/**
+ * Filename of the unique file
+ */
+static char *fn;
+
+/**
+ * Handle to the unique file
+ */
+static int fh;
+
+/**
+ * The return code of the binary
+ */
+static unsigned long child_exit_code;
+
+/**
+ * The process status of the child
+ */
+static enum GNUNET_OS_ProcessStatusType child_status;
+
+/**
+ * Task to kill the child
+ */
+static struct GNUNET_SCHEDULER_Task * terminate_task_id;
+
+/**
+ * Task to kill the child
+ */
+static struct GNUNET_SCHEDULER_Task * child_death_task_id;
+
+/**
+ * The shutdown task
+ */
+static void
+shutdown_task (void *cls)
+{
+ if (0 != child_exit_code)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "Child exited with error code: %lu\n",
+ child_exit_code);
+ ret = 128 + (int) child_exit_code;
+ }
+ if (0 != fh)
+ {
+ close (fh);
+ }
+ if ((NULL != fn) && (0 != unlink (fn)))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "open");
+ ret = GNUNET_SYSERR;
+ }
+}
+
+
+static void
+terminate_task (void *cls)
+{
+ static int hard_kill;
+
+ GNUNET_assert (NULL != child);
+ terminate_task_id =
+ GNUNET_SCHEDULER_add_shutdown (&terminate_task, NULL);
+ if (0 != hard_kill)
+ {
+ switch (hard_kill)
+ {
+ case 1:
+ case 2:
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "%d more interrupts needed to send SIGKILL to the child\n",
+ 3 - hard_kill);
+ hard_kill++;
+ return;
+ case 3:
+ GNUNET_break (0 == GNUNET_OS_process_kill (child, SIGKILL));
+ return;
+ }
+ }
+ hard_kill++;
+ GNUNET_break (0 == GNUNET_OS_process_kill (child, GNUNET_TERM_SIG));
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Waiting for child to exit.\n"));
+}
+
+
+/**
+ * Task triggered whenever we receive a SIGCHLD (child
+ * process died).
+ *
+ * @param cls closure, NULL if we need to self-restart
+ */
+static void
+child_death_task (void *cls)
+{
+ const struct GNUNET_DISK_FileHandle *pr;
+ char c[16];
+ const struct GNUNET_SCHEDULER_TaskContext *tc;
+
+
+ pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
+ child_death_task_id = NULL;
+ tc = GNUNET_SCHEDULER_get_task_context ();
+ if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
+ {
+ child_death_task_id =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ pr, &child_death_task, NULL);
+ return;
+ }
+ /* consume the signal */
+ GNUNET_break (0 < GNUNET_DISK_file_read (pr, &c, sizeof (c)));
+ LOG_DEBUG ("Child died\n");
+ GNUNET_SCHEDULER_cancel (terminate_task_id);
+ terminate_task_id = NULL;
+ GNUNET_assert (GNUNET_OK == GNUNET_OS_process_status (child, &child_status,
+ &child_exit_code));
+ GNUNET_OS_process_destroy (child);
+ child = NULL;
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+}
+
+
+static void
+destroy_hosts(struct GNUNET_TESTBED_Host **hosts, unsigned int nhosts)
+{
+ unsigned int host;
+
+ GNUNET_assert (NULL != hosts);
+ for (host = 0; host < nhosts; host++)
+ if (NULL != hosts[host])
+ GNUNET_TESTBED_host_destroy (hosts[host]);
+ GNUNET_free (hosts);
+ hosts = NULL;
+}
+
+
+/**
+ * The main scheduler run task
+ *
+ * @param cls NULL
+ */
+static void
+run (void *cls)
+{
+ struct GNUNET_TESTBED_Host **hosts;
+ const struct GNUNET_CONFIGURATION_Handle *null_cfg;
+ char *tmpdir;
+ char *hostname;
+ size_t hostname_len;
+ unsigned int nhosts;
+
+ null_cfg = GNUNET_CONFIGURATION_create ();
+ nhosts = GNUNET_TESTBED_hosts_load_from_loadleveler (null_cfg, &hosts);
+ if (0 == nhosts)
+ {
+ GNUNET_break (0);
+ ret = GNUNET_SYSERR;
+ return;
+ }
+ hostname_len = GNUNET_OS_get_hostname_max_length ();
+ hostname = GNUNET_malloc (hostname_len);
+ if (0 != gethostname (hostname, hostname_len))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot get hostname. Exiting\n");
+ GNUNET_free (hostname);
+ destroy_hosts (hosts, nhosts);
+ ret = GNUNET_SYSERR;
+ return;
+ }
+ if (NULL == strstr (GNUNET_TESTBED_host_get_hostname (hosts[0]), hostname))
+ {
+ LOG_DEBUG ("Exiting as `%s' is not the lowest host\n", hostname);
+ GNUNET_free (hostname);
+ ret = GNUNET_OK;
+ return;
+ }
+ LOG_DEBUG ("Will be executing `%s' on host `%s'\n", argv2[0], hostname);
+ GNUNET_free (hostname);
+ destroy_hosts (hosts, nhosts);
+ tmpdir = getenv ("TMPDIR");
+ if (NULL == tmpdir)
+ tmpdir = getenv ("TMP");
+ if (NULL == tmpdir)
+ tmpdir = getenv ("TEMP");
+ if (NULL == tmpdir)
+ tmpdir = "/tmp";
+ (void) GNUNET_asprintf (&fn, "%s/gnunet-testbed-spawn.lock", tmpdir);
+ /* Open the unique file; we can create it then we can spawn the child process
+ else we exit */
+ fh = open (fn, O_CREAT | O_EXCL | O_CLOEXEC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (-1 == fh)
+ {
+ if (EEXIST == errno)
+ {
+ LOG_DEBUG ("Lock file already created by other process. Exiting\n");
+ ret = GNUNET_OK;
+ return;
+ }
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "open");
+ ret = GNUNET_SYSERR;
+ return;
+ }
+ /* Spawn the new process here */
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Spawning process `%s'\n"), argv2[0]);
+ child = GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ALL, NULL,
+ NULL, NULL,
+ argv2[0], argv2);
+ if (NULL == child)
+ {
+ GNUNET_break (0);
+ ret = GNUNET_SYSERR;
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+ return;
+ }
+ ret = GNUNET_OK;
+ terminate_task_id =
+ GNUNET_SCHEDULER_add_shutdown (&terminate_task, NULL);
+ child_death_task_id =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_DISK_pipe_handle (sigpipe,
+ GNUNET_DISK_PIPE_END_READ),
+ &child_death_task, NULL);
+}
+
+
+/**
+ * Signal handler called for SIGCHLD.
+ */
+static void
+sighandler_child_death ()
+{
+ static char c;
+ int old_errno = errno; /* back-up errno */
+
+ GNUNET_break (1 ==
+ GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
+ (sigpipe, GNUNET_DISK_PIPE_END_WRITE),
+ &c, sizeof (c)));
+ errno = old_errno; /* restore errno */
+}
+
/**
* Execution start point
int
main (int argc, char *argv[])
{
- static const struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_OPTION_END
- };
- struct GNUNET_OS_Process *proc;
- char **argv2;
- unsigned long code;
- enum GNUNET_OS_ProcessStatusType proc_status;
- int rank;
- int chstat;
- unsigned int host;
+ struct GNUNET_SIGNAL_Context *shc_chld;
unsigned int cnt;
-
+
ret = -1;
if (argc < 2)
{
printf ("Need arguments: gnunet-testbed-mpi-spawn <cmd> <cmd_args>");
return 1;
}
- if (MPI_SUCCESS != MPI_Init (&argc, &argv))
+ if (GNUNET_OK != GNUNET_log_setup ("gnunet-testbed-spawn", NULL, NULL))
{
GNUNET_break (0);
- return 2;
+ return 1;
}
- if (MPI_SUCCESS != MPI_Comm_rank (MPI_COMM_WORLD, &rank))
+ if (NULL == (sigpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO,
+ GNUNET_NO, GNUNET_NO)))
{
GNUNET_break (0);
- ret = 3;
- goto finalize;
+ ret = GNUNET_SYSERR;
+ return 1;
}
- if (0 != rank)
+ shc_chld =
+ GNUNET_SIGNAL_handler_install (GNUNET_SIGCHLD, &sighandler_child_death);
+ if (NULL == shc_chld)
{
- ret = 0;
- goto finalize;
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot install a signal handler\n");
+ return 1;
}
- PRINTF ("Spawning process\n");
argv2 = GNUNET_malloc (sizeof (char *) * argc);
for (cnt = 1; cnt < argc; cnt++)
argv2[cnt - 1] = argv[cnt];
- proc =
- GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ALL, NULL,
- NULL, argv2[0], argv2);
- if (NULL == proc)
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot exec\n");
- ret = 5;
- goto finalize;
- }
- do
- {
- (void) sleep (1);
- chstat = GNUNET_OS_process_status (proc, &proc_status, &code);
- }
- while (GNUNET_NO == chstat);
- if (GNUNET_OK != chstat)
- {
- ret = 6;
- goto finalize;
- }
- if (0 != code)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING, "Child terminated abnormally\n");
- ret = 50 + (int) code;
- goto finalize;
- }
- ret = 0;
-
- finalize:
- (void) MPI_Finalize ();
- if (0 != ret)
- LOG (GNUNET_ERROR_TYPE_ERROR, "Something went wrong. Error: %d\n", ret);
- return ret;
+ GNUNET_SCHEDULER_run (run, NULL);
+ GNUNET_free (argv2);
+ GNUNET_SIGNAL_handler_uninstall (shc_chld);
+ shc_chld = NULL;
+ GNUNET_DISK_pipe_close (sigpipe);
+ GNUNET_free_non_null (fn);
+ if (GNUNET_OK != ret)
+ return ret;
+ return 0;
}
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