Nouvelle bibliothèque avec fonction pour gérer les erreurs
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4 changed files with 95 additions and 50 deletions
41
src/boitoutil/essential_shell.c
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src/boitoutil/essential_shell.c
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/**
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* @file essential_shell.c
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* @author rick <rick@gnous.eu>
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* @date 2021
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*/
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#include "essential_shell.h"
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#include <stdio.h>
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#include <stdlib.h>
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/**
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* error(): gère les erreurs selon leur code et leur type
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* @code: code de l’erreur, voir les différents codes plus bas
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* @type: NON_FATAL_ERROR pour continuer l’exécution
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* FATAL_ERROR pour stoper le programme
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* @message: message à afficher pour + d’infos ou erreur non implémentée
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*
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* 1 erreur lors de la création des pipes
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*/
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void error(int code, int type, char *message)
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{
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switch (code)
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{
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case 1:
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printf("Erreur lors de la création des pipes.\n");
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break;
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default:
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if (message == NULL)
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printf("Erreur inconnue.\n");
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else
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printf("%s\n", message);
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}
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if (message != NULL)
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printf("Message complémentaire :\n%s\n", message);
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if (type == FATAL_ERROR)
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exit(code);
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}
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19
src/boitoutil/essential_shell.h
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src/boitoutil/essential_shell.h
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/**
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* Header pour la bibliothèque permettant d’avoir des
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* outils essentiels pour le shell tel que la fonction pour
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* afficher des erreurs.
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* @file essential_shell.h
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* @author rick <rick@gnous.eu>
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* @date 2021
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*/
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#ifndef _ESSHELL_
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# define _ESSHELL_
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#define SHELL rishtik
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#define FATAL_ERROR 1
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#define NON_FATAL_ERROR 0
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void error(int code, int type, char *message);
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#endif
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@ -11,7 +11,6 @@
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# define _PARSER_H_
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# define _PARSER_H_
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#define MAX_LENGTH 200 /* taille maximum des tableaux utilisés */
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#define MAX_LENGTH 200 /* taille maximum des tableaux utilisés */
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#define SHELL rishtik
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char* get_input();
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char* get_input();
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void get_command(char *args[], char find);
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void get_command(char *args[], char find);
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*/
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*/
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#include "parser.h"
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#include "parser.h"
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#include "essential_shell.h"
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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int main()
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int main()
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{
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{
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int pid;
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/** commands contient l’entrée utilisateur parsée avec | :
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char *args[MAX_LENGTH];
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* ls | wc -l -> [ls, wc -l]
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char *command[MAX_LENGTH];
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*
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* args contient une commande à la fois avec ses arguments séparés
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* par les espaces :
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* ls -R test -> [ls, -R, test]
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*/
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char *commands[MAX_LENGTH];
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char *args[MAX_LENGTH];
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int pid, index = 0, end = 0; /* end permet de savoir quand s’arreter */
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int my_pipe[2];
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int my_pipe[2];
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if (pipe(my_pipe) == -1)
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if (pipe(my_pipe) == -1)
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{
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error(1, FATAL_ERROR, NULL);
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printf("erreur pipe");
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return 1;
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}
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for (int i = 0; i < MAX_LENGTH; i++)
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for (int i = 0; i < MAX_LENGTH; i++)
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{
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{
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args[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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args[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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command[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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commands[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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}
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}
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get_command(args, '|');
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get_command(commands, '|');
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int index = 0;
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while (strcmp(commands[0], "exit"))
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while (strcmp(args[0], "exit"))
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{
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{
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while (args[index] != NULL)
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while (commands[index] != NULL)
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{
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{
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if (strncmp(args[index], "cd", 2))
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{
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pid = fork();
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pid = fork();
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if (!pid)
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if (!pid)
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{
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{
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parse_string(args[index], command, ' ');
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parse_string(commands[index], args, ' ');
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if (args[1] != NULL)
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if (commands[index+1] == NULL)
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{
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dup2(my_pipe[0], STDIN_FILENO);
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if (args[index+1] == NULL)
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else if (index == 0)
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dup2(my_pipe[0], STDIN_FILENO);
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dup2(my_pipe[1], STDOUT_FILENO);
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else if (index == 0)
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close(my_pipe[0]);
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dup2(my_pipe[1], STDOUT_FILENO);
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close(my_pipe[1]);
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/*else {
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dup2(my_pipe[0], STDIN_FILENO);
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dup2(my_pipe[1], STDOUT_FILENO);
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}*/
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close(my_pipe[0]);
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close(my_pipe[1]);
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}
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execvp(command[0], command);
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execvp(args[0], args);
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return 0;
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return 0;
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}
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}
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else
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else
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{
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{
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if (args[index + 1] == NULL)
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if (commands[index + 1] == NULL)
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{
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{
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close(my_pipe[1]);
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close(my_pipe[1]);
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close(my_pipe[0]);
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close(my_pipe[0]);
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waitpid(pid, NULL, 0);
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waitpid(pid, NULL, 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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else
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{
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parse_string(args[index], command, ' ');
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execvp(command[0], command);
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for (int i = 0; i < MAX_LENGTH; i++)
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{
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free(command[i]);
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command[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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}
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}
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index++;
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index++;
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}
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}
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/* remise à 0 des entrées, des commandes, des pipes et de l’index */
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for (int i = 0; i < MAX_LENGTH; i++)
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for (int i = 0; i < MAX_LENGTH; i++)
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{
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{
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free(args[i]);
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free(args[i]);
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free(command[i]);
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free(commands[i]);
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args[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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args[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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command[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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commands[i] = (char *) calloc(MAX_LENGTH, sizeof(char));
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}
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}
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get_command(args, '|');
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get_command(commands, '|');
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if (pipe(my_pipe) == -1)
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if (pipe(my_pipe) == -1)
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{
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error(1, FATAL_ERROR, NULL);
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printf("erreur sur le pipe");
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return 1;
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}
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index = 0;
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index = 0;
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}
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}
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for (int i = 0; i < MAX_LENGTH; i++)
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for (int i = 0; i < MAX_LENGTH; i++)
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{
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{
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free(command[i]);
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free(commands[i]);
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free(args[i]);
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free(args[i]);
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}
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}
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return 0;
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return 0;
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