78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#define R 0
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#define W 1
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void action (int sig) {
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printf("Je capture SIGPIPE\n");
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// quand les read se font sur des tubes sans écrivain
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}
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int main() {
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int fdp[2], // père vers le fils
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fdf[2]; // fils vers père
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pid_t pid;
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char message[100]; // pour récupérer un message
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char *phrasef = "message envoyé au père par le fils";
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char *phrasep = "message envoyé au fils par le père";
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if ((pipe(fdf) == -1) || (pipe(fdp) == -1)) {
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perror("Pipe erreur");
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exit(1);
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}
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signal(SIGPIPE, &action);
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if ((pid = fork()) == -1) {
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perror("Fork erreur");
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exit(2);
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}
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if (pid == 0) {
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close(fdf[R]);
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close(fdp[W]);
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if (write(fdf[W], phrasef, strlen(phrasef)+1) != -1) {
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sleep(4);
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if (read(fdp[R], message, 100) >= 0) {
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printf("J'ai lu : %s\n", message);
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} else {
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perror("Read erreur"); exit(4);
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}
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} else {
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perror("Write erreur"); exit(3);
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}
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close(fdp[R]);
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close(fdf[W]);
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exit(0);
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}
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close(fdp[R]);
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close(fdf[W]);
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if (write(fdp[W], phrasep, strlen(phrasep)+1) != -1) {
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sleep(2);
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if (read(fdf[R], message, 100) >= 0) {
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printf("J'ai lu : %s\n", message);
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} else {
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perror("Read erreur"); exit(4);
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}
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} else {
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perror("Write erreur"); exit(3);
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}
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close(fdf[R]);
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close(fdp[W]);
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return 0;
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// A compléter
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}
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