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/* klaar@ida
Will try to start N child-processes, giving each an increasing
number starting on S as argument to main. Will return S+C where C
is the number of sucessfully started children.
Normally used from some parent program.
*/
#include <syscall.h>
#include <stdlib.h>
#include <stdio.h>
#define BUF_SIZE 64
int main(int argc, char* argv[])
{
int i;
char cmd[BUF_SIZE];
char* child;
int start;
int count;
if (argc != 4)
{
printf("Usage: %s CHILD S N\n", argv[0]);
printf("%s starts N copies of CHILD.\n", argv[0]);
printf("Each child receives an unique integer I as first parameter in the range S..(S+N-1).\n");
printf("Returns S + N on success, S + I if only I children could be started.\n");
return -1;
}
child = argv[1];
start = atoi(argv[2]);
count = atoi(argv[3]);
for(i = 0; i < count; i++)
{
snprintf(cmd, BUF_SIZE, "%s %i", child, start + i);
if (exec(cmd) == -1)
{
printf("!! ERROR !!\n");
printf("Could not start '%s'\n", cmd);
break;
}
}
exit(start + i);
}
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