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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "litmus.h"
typedef struct {
char * exec_path;
char ** argv;
} startup_info_t;
int launch(void *task_info_p) {
startup_info_t *info = (startup_info_t*) task_info_p;
int ret;
ret = execv(info->exec_path, info->argv);
perror("execv failed");
return ret;
}
void usage(char *error) {
fprintf(stderr, "%s\nUsage: launch_rt [-c {hrt|srt|be}] [-p <cpu>]"
"<wcet> <period> program arg1 arg2 ...\n",
error);
exit(1);
}
#define OPTSTR "p:c:"
int main(int argc, char** argv)
{
int ret;
int wcet;
int period;
int cpu = 0;
int opt;
startup_info_t info;
task_class_t class = RT_CLASS_HARD;
while ((opt = getopt(argc, argv, OPTSTR)) != -1) {
switch (opt) {
case 'p':
cpu = atoi(optarg);
break;
case 'c':
class = str2class(optarg);
if (class == -1)
usage("Unknown task class.");
break;
case ':':
usage("Argument missing.");
break;
case '?':
default:
usage("Unknown flag.");
break;
}
}
if (argc - optind < 3)
{
printf("argc: %d optind: %d\n", argc, optind);
usage("Arguments missing.");
}
wcet = atoi(argv[optind + 0]);
period = atoi(argv[optind + 1]);
if (wcet <= 0)
usage("The worst-case execution time must be a positive number.");
if (period <= 0)
usage("The period must be a positive number.");
if (wcet > period) {
usage("The worst-case execution time must not exceed the period.");
}
info.exec_path = argv[optind + 2];
info.argv = argv + optind + 2;
ret = __create_rt_task(launch, &info, cpu, wcet, period, class);
if (ret < 0) {
perror("Could not create rt child process");
}
return 0;
}
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