84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
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/*
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Klient oparty na kolejkach FIFO
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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static const char *katalog = "/tmp/FIFO-TMP-SERWER";
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int main()
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{
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pid_t numer_procesu;
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int f, f1, f2;
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char bufor[1000], *pom = bufor;
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numer_procesu = getpid();
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if ((f = open(katalog, 1)) == -1)
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{
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perror("Klient: Nie moge ustanowic polaczenia z serwerem. [1]\n");
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return -1;
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}
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else
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{
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strcpy(pom, "/tmp/FIFO-TMP-1-");
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pom += strlen(pom);
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sprintf(pom, "%d", (int)numer_procesu);
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if (mknod(bufor, S_IFIFO | 0600, 0) == -1) /* kolejka do czytania */
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{
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perror("Klient: Blad tworzenia kolejki FIFO. [2]\n");
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close(f);
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return -1;
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}
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else
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{
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*(pom - 2) = '2';
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if (mknod(bufor, S_IFIFO | 0600, 0) == -1) /* kolajka do pisania */
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{
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perror("Klient: Blad tworzenia kolejki FIFO. [3]\n");
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close(f2);
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close(f);
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return -1;
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}
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write(f, &numer_procesu, sizeof(pid_t));
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close(f);
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if ((f1 = open(bufor, O_WRONLY)) == -1) /* kolejka do pisania */
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{
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perror("Klient: Blad otwarcia kolejki FIFO. [4]\n");
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close(f);
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return -1;
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}
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else
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{
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*(pom - 2) = '1';
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if ((f2 = open(bufor, O_RDONLY)) == -1) /* kolajka do czytania */
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{
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perror("Klient: Blad otwarcia kolejki FIFO. [5]\n");
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close(f1);
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close(f);
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return -1;
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}
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else
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{
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double a, b;
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printf("Podaj liczbe: ");
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scanf("%lf", &a);
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write(f1, &a, sizeof(double));
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read(f2, &b, sizeof(double));
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printf("Wynik obliczen %lf^2 = %lf.\n", a, b);
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close(f1);
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close(f2);
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close(f);
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unlink(bufor);
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*(pom - 2) = '2';
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unlink(bufor);
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return 0;
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}
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}
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}
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}
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}
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