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// 2gnash.c v1.0 Jan 15, 2009
// Hack of nlrs.c by Conor Meagher to run lrs simultaneously on n processors for n input files
// runs gnash on input files A B in both orders simultaneously, terminating when first proc finishes
// output goes in third argument if any, else in file: out
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
pid_t cpid[argc - 1], w;
char buffer [250];
int status,l,j;
if (argc < 3 || argc > 4) {
printf("Usage: 2gnash A B [outfile]\n");
return(0);
}
for(l = 1; l < 3; l++) {
cpid[l -1] = fork();
if (cpid[l -1] == -1) {
perror("fork");
exit(EXIT_FAILURE);
}
if(cpid[l-1] == 0) {
//forked threads
// n= sprintf(buffer, "lrs %s > out%i", argv[l], l);
if(l==1) {
int n= sprintf(buffer, "gnash %s %s > out%i", argv[1], argv[2], l);
}
else {
int n= sprintf(buffer, "gnash %s %s > out%i", argv[2], argv[1], l);
}
int i=system(buffer);
_exit(0);
}
}
// main thread
w = wait(&status);
for(j = 1; j < 3; j++) {
if(w == cpid[j-1]) {
// this child finished first
if(j==1)
printf("gnash %s %s finished first\n", argv[1], argv[2]);
else {
printf("gnash %s %s finished first\n", argv[2], argv[1]);
printf("player numbers will be reversed in output\n");
}
if(argc == 4) {
printf("output file: %s\n", argv[3]);
int n = sprintf(buffer, "/bin/mv -f out%i %s", j, argv[3]);
}
else {
printf("output file: out\n", argv[2], argv[1]);
int n = sprintf(buffer, "/bin/mv -f out%i out", j);
}
int i = system(buffer);
} else {
// printf("terminating lrs of file %s\n", argv[j]);
int n = sprintf(buffer, "/bin/rm -f out%i", j);
int i = system(buffer);
}
}
printf("the other process will be "); /*...will be killed */
fflush(stdout);
kill(0,9);
exit(EXIT_SUCCESS);
}
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