40 lines
844 B
C
40 lines
844 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define AVANCER 256
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#define STDOUT 1
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#define STDERR 2
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void erreur(ssize_t resultat, char* message){
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if (resultat==-1){
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perror(message);
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exit;
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}
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}
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int main(int argc, char** argv){
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int descripteur;
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ssize_t echec;
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char tampon[AVANCER];
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if (argc < 2){
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echec = write(STDERR,"Mauvaise utilisation !\n",23);
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erreur(echec, "Affichage sur stderr");
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return EXIT_FAILURE;
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}
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descripteur = open(argv[1], O_RDONLY);
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erreur((ssize_t) descripteur, "Ouverture du fichier");
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while (echec = read(descripteur, tampon, AVANCER)>0){
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echec = write(STDOUT,tampon,echec);
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erreur(echec,"Affichage sur stdout");
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}
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erreur(echec,"lectureFichier");
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erreur(close(descripteur),"fermeture du fichier");
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return EXIT_SUCCESS;
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}
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