64 lines
1.1 KiB
C
Executable File
64 lines
1.1 KiB
C
Executable File
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <wait.h>
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int
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main(int argc, char **argv)
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{
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int n = strtoll(argv[1], NULL, 10);
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int fd1[2];
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int fd2[2];
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pipe(fd1);
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pipe(fd2);
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int tmp = 1;
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write(fd2[1], &tmp, sizeof(tmp));
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if (!fork()) {
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int i = 0;
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close(fd1[0]);
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close(fd2[1]);
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while (i < n) {
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read(fd2[0], &i, sizeof(i));
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if (i > n) {
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break;
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}
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printf("Channel %d: %d\n", 1, i);
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i++;
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write(fd1[1], &i, sizeof(i));
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}
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return 0;
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} else if (!fork()) {
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int i = 0;
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close(fd2[0]);
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close(fd1[1]);
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while (i < n) {
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read(fd1[0], &i, sizeof(i));
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if (i > n) {
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break;
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}
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printf("Channel %d: %d\n", 2, i);
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i++;
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write(fd2[1], &i, sizeof(i));
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}
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return 0;
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} else {
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close(fd1[0]);
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close(fd1[1]);
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close(fd2[0]);
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close(fd2[1]);
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}
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while (wait(NULL) != -1)
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;
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return 0;
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}
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