120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#define BUFSIZE 512
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void traiter(char tampon[], char cde, int nb)
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{
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int i;
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switch (cde)
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{
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case 'X':
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break;
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case 'Q':
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exit(0);
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break;
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case 'R':
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write(1, tampon, nb);
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break;
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case 'M':
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for (i = 0; i < nb; i++)
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{
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tampon[i] = toupper(tampon[i]);
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}
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write(1, tampon, nb);
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break;
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case 'm':
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for (i = 0; i < nb; i++)
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{
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tampon[i] = tolower(tampon[i]);
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}
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write(1, tampon, nb);
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break;
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default:
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printf("????\n");
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}
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}
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int main(int argc, char *argv[])
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{
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int p[2];
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pid_t pid;
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int d, nlus;
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char buf[BUFSIZE];
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char commande = 'R'; /* mode normal */
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if (argc != 2)
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{
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printf("utilisation : %s <fichier source>\n", argv[0]);
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exit(1);
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}
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if (pipe(p) == -1)
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{
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perror("pipe");
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exit(2);
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}
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pid = fork();
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if (pid == -1)
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{
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perror("fork");
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exit(3);
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}
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if (pid == 0)
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{ /* fils */
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d = open(argv[1], O_RDONLY);
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if (d == -1)
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{
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fprintf(stderr, "Impossible d'ouvrir le fichier ");
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perror(argv[1]);
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exit(4);
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}
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close(p[0]); /* pour finir malgre tout, avec sigpipe */
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while (true)
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{
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while ((nlus = read(d, buf, BUFSIZE)) > 0)
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{
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/* read peut lire moins que le nombre d'octets demandes, en
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* particulier lorsque la fin du fichier est atteinte. */
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write(p[1], buf, nlus);
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sleep(5);
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}
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sleep(5);
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printf("on recommence...\n");
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lseek(d, (off_t)0, SEEK_SET);
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}
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}
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else
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{ /* pere */
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close(p[1]);
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system("stty -icanon min 1"); // saisie entrees clavier sans tampon
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/* a completer */
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while (true)
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{
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/* debut code a completer et adapter */
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read(0, &commande, sizeof(char));
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printf("-->%c\n", commande);
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bzero(buf, BUFSIZE); // nettoyage
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if ((nlus = read(p[0], buf, BUFSIZE)) > 0)
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{
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traiter(buf, commande, nlus);
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}
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/* fin code a completer et adapter */
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sleep(1);
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}
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}
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return 0;
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}
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