48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#define BUFSIZ 255
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int main()
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{
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int nbOctets;
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int descTube[2];
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int descTube2[2];
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char chaine[] = "Salut papa!";
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char buffer[BUFSIZ];
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pid_t pid;
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memset(buffer, '\0', BUFSIZ);
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if ( pipe(descTube) == 0 && pipe(descTube2) == 0)
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{
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pid = fork(); // duplication du processus
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if (pid == -1) // oups un probleme
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{
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fprintf(stderr, "Pb de fork");
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exit(EXIT_FAILURE);
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}
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else // fork ok
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{
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if (pid == 0) // je suis dans le process fils
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{
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nbOctets = read(descTube[0], buffer, BUFSIZ);
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nbOctets = write(descTube2[1], chaine, strlen(chaine));
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printf("%d octets ecrits\n", nbOctets);
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printf("octets lus: %d: %s\n", nbOctets, buffer);
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exit(EXIT_SUCCESS);
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}
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else //je suis dans le process pere
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{
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strcpy(chaine, "test");
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nbOctets = write(descTube[1], chaine, strlen(chaine));
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nbOctets = read(descTube2[0], buffer, BUFSIZ);
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printf("%d octets ecrits\n", nbOctets);
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printf("octets lus: %d: %s\n", nbOctets, buffer);
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}
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}
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}
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exit(EXIT_SUCCESS);
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}
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