fds=malloc(multi*sizeof *fds);
for(n=0 ; n < multi ; ++n)
{
- pipe(fd);
+ if (pipe(fd) == -1)
+ {
+ fprintf(stderr, "pipe failure\n");
+ exit(1);
+ }
fflush(stdout);
fflush(stderr);
if(fork())
{
close(fd[0]);
close(1);
- dup(fd[1]);
+ if (dup(fd[1]) == -1)
+ {
+ fprintf(stderr, "dup failed\n");
+ exit(1);
+ }
close(fd[1]);
mr=1;
usertime=0;