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#include "platform.h"
#include "gnunet_util_lib.h"
#include <mpi.h>
/**
* Generic logging shorthand
*/
#define LOG(kind, ...) \
GNUNET_log_from(kind, "gnunet-mpi-test", __VA_ARGS__)
int
main(int argc, char *argv[])
{
char *msg;
char *filename;
char **argv2;
struct GNUNET_OS_Process *proc;
unsigned long code;
pid_t pid;
enum GNUNET_OS_ProcessStatusType proc_status;
int ntasks;
int rank;
int msg_size;
int ret;
unsigned int cnt;
ret = GNUNET_SYSERR;
if (argc < 2)
{
printf("Need arguments: gnunet-mpi-test <cmd> <cmd_args>");
return 1;
}
if (MPI_SUCCESS != MPI_Init(&argc, &argv))
{
GNUNET_break(0);
return 1;
}
if (MPI_SUCCESS != MPI_Comm_size(MPI_COMM_WORLD, &ntasks))
{
GNUNET_break(0);
goto finalize;
}
if (MPI_SUCCESS != MPI_Comm_rank(MPI_COMM_WORLD, &rank))
{
GNUNET_break(0);
goto finalize;
}
pid = getpid();
(void)GNUNET_asprintf(&filename, "%d-%d.mpiout", (int)pid, rank);
msg_size = GNUNET_asprintf(&msg, "My rank is: %d\n", rank);
printf("%s", msg);
if (msg_size ==
GNUNET_DISK_fn_write(filename, msg, msg_size,
GNUNET_DISK_PERM_USER_READ |
GNUNET_DISK_PERM_GROUP_READ |
GNUNET_DISK_PERM_USER_WRITE |
GNUNET_DISK_PERM_GROUP_WRITE))
ret = GNUNET_OK;
GNUNET_free(filename);
GNUNET_free(msg);
if (GNUNET_OK != ret)
{
GNUNET_break(0);
goto finalize;
}
ret = GNUNET_SYSERR;
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, NULL, argv2[0], argv2);
if (NULL == proc)
{
printf("Cannot exec\n");
GNUNET_free(argv2);
goto finalize;
}
do
{
(void)sleep(1);
ret = GNUNET_OS_process_status(proc, &proc_status, &code);
}
while (GNUNET_NO == ret);
GNUNET_free(argv2);
GNUNET_assert(GNUNET_NO != ret);
if (GNUNET_OK == ret)
{
if (0 != code)
{
LOG(GNUNET_ERROR_TYPE_WARNING, "Child terminated abnormally\n");
ret = GNUNET_SYSERR;
GNUNET_break(0);
goto finalize;
}
}
else
GNUNET_break(0);
finalize:
(void)MPI_Finalize();
if (GNUNET_OK == ret)
return 0;
printf("Something went wrong\n");
return 1;
}
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