jD91mZM2
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
//http://www2.cs.uregina.ca/~hamilton/courses/330/notes/unix/pipes/pipes.html
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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int main()
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{
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int pid, pip[2];
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char instring[20];
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char * outstring = "Hello World!";
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pipe(pip);
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pid = fork();
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if (pid == 0) /* child : sends message to parent*/
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{
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puts("Child: Close Read");
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/* close read end */
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close(pip[0]);
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puts("Child: Write");
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/* send 7 characters in the string, including end-of-string */
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write(pip[1], outstring, strlen(outstring));
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puts("Child: Close Write");
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/* close write end */
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close(pip[1]);
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}
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else /* parent : receives message from child */
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{
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puts("Parent: Close Write");
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/* close write end */
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close(pip[1]);
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puts("Parent: Read");
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/* read from the pipe */
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read(pip[0], instring, 7);
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puts("Parent: Close Read");
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/* close read end */
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close(pip[0]);
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}
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return 0;
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}
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