46 lines
764 B
C++
46 lines
764 B
C++
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#include <stdio.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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int main()
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{
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int pfds[2];
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if (pipe(pfds) < 0)
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{
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perror("pipe");
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return 1;
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}
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pid_t child = fork();
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if (child == 0)
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{
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close(pfds[1]);
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char buffer[4096];
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size_t nread = read(pfds[0], buffer, sizeof(buffer) - 1);
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buffer[nread] = 0;
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close(pfds[0]);
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puts(buffer);
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return 0;
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}
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else if (child == -1)
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{
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perror("fork");
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return 1;
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}
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close(pfds[0]);
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const char* string = "Hello from a child process who just received this message from its parent!";
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write(pfds[1], string, strlen(string));
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close(pfds[1]);
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wait(NULL);
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return 0;
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}
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