Support des commandes internes basiques et implémentation rudimentaire des commandes générales

CMakeLists.txt

@@ -4,5 +4,5 @@ project(fish)
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_FLAGS "-Wall -Werror -pedantic -fpic -Wextra")
 
-set(SOURCE_FILES main.c fish_lib/fish_lib.c fish_lib/fish_lib.h)
+set(SOURCE_FILES main.c fish_shell/fish_core.c fish_shell/fish_core.h fish_shell/fish_commands.c fish_shell/fish_commands.h fish_shell/fish_types.h)
 add_executable(fish ${SOURCE_FILES})

fish_shell/fish_commands.c

@@ -0,0 +1,64 @@
+//
+// Created by Antoine Bartuccio on 14/05/2017.
+//
+#include <stdio.h>
+#include <unistd.h>
+#include "fish_core.h"
+
+/* Necessary global variables */
+char * builtinCommandsStr[] = {
+        "cd",
+        "help",
+        "exit"
+};
+
+
+builtinCommand *builtinCommands[] = {
+        &fishCd,
+        &fishHelp,
+        &fishExit
+};
+
+char ** getBuiltinCommandsStr(){
+    return builtinCommandsStr;
+}
+
+builtinCommand **getBuiltinCommands(){
+    return builtinCommands;
+}
+
+int fishCd(WordArray *args) {
+    if (args->size < 2){
+        fprintf(stderr, "fish: Où sont les arguments de ta commande \"cd\" connard ?!\n");
+    } else {
+        if (chdir(args->words[1]) != 0){
+            perror("fish");
+        }
+    }
+    return 1;
+}
+
+int fishHelp(WordArray *args) {
+    int i;
+    printf("Bartuccio Antoine, Amalvy Arthur, Yann Chevanton\n");
+    printf("Tape tes putains de noms de programmes et tes arguments de merde et tabasse ENTER !\n");
+    printf("Les commandes suivantes sont internes :\nls");
+    for (i=0; i < getNbBuiltins(); i++){
+        printf("\t%s\n", builtinCommandsStr[i]);
+    }
+    printf("Et sinon pour le reste, RTFM !");
+    if (args->size > 0)
+        return 1;
+    return 1;
+}
+
+int fishExit(WordArray *args) {
+    if (args->size != 1)
+        return 1;
+    else
+        return 0;
+}
+
+int getNbBuiltins() {
+    return sizeof(builtinCommandsStr) / sizeof(char*);
+}

fish_shell/fish_commands.h

@@ -0,0 +1,24 @@
+//
+// Created by Antoine Bartuccio on 14/05/2017.
+//
+
+#ifndef FISH_FISH_COMMANDS_H
+#define FISH_FISH_COMMANDS_H
+
+#include "fish_core.h"
+
+/* Getters */
+
+char ** getBuiltinCommandsStr ();
+builtinCommand **getBuiltinCommands();
+int getNbBuiltins();
+
+/* Built in shell commands */
+
+int fishCd(WordArray * args);
+
+int fishHelp(WordArray * args);
+
+int fishExit(WordArray * args);
+
+#endif //FISH_FISH_COMMANDS_H

fish_shell/fish_core.c

@@ -4,7 +4,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "fish_lib.h"
+#include <unistd.h>
+#include "fish_core.h"
 
 #define FISH_BUFFER_SIZE 1024
 #define FISH_TOKENS " \t\r\n\a"
@@ -12,24 +13,20 @@
 void fishLoop(Settings * settings){
     char * line = NULL;
     WordArray * splited = NULL;
-    int exited = 0;
-    int i;
+    int status = 1;
 
-    while (!exited) {
+    do {
         printf("%s", settings->PS1);
         line = fishReadLine();
         line = fishExpand(line);
 
         splited = split(line, FISH_TOKENS);
-        for (i = 0; i < splited->size; i++) {
-            printf("%s\n", splited->words[i]);
-            if(!strcmp(splited->words[i], "exit"))
-                exited = 1;
-        }
+
+        status = fishExecute(splited);
 
         freeWordArray(splited);
         free(line);
-    }
+    } while(status);
 }
 
 int countSeparators(char *string, char *separators) {
@@ -101,11 +98,14 @@ char *fishReadLine() {
     while (1){
         c = getchar();
 
-        if (c == EOF || c == '\n'){
-            line[position] = '\0';
-            return line;
-        } else {
-            line[position] = (char) c;
+        switch (c){
+            case '\n':
+                line[position] = '\0';
+                return line;
+            case EOF:
+                exit(EXIT_SUCCESS);
+            default:
+                line[position] = (char) c;
         }
 
         position++;
@@ -134,8 +134,48 @@ Settings *getSettings() {
         fprintf(stderr, "fish: Error allocating fucking settings");
         exit(EXIT_FAILURE);
     }
-    s->PS1 = strdup("~>");
+    s->PS1 = strdup("\n~>");
 
     return s;
 }
 
+int fishLoad(WordArray *array) {
+    pid_t pid;
+    int status;
+
+    pid = fork();
+    if (pid == 0){
+        /* Executes only in the child process */
+        if (execvp(array->words[0], array->words) == -1){
+            /* Error during system call */
+            perror("fish");
+        }
+        exit(EXIT_FAILURE);
+    } else if (pid < 0){
+        /* Fork failed */
+        perror("fish");
+    } else {
+        /* Handle parent process */
+
+        /* Wait for the child process to finish */
+        do {
+            waitpid(pid, &status, WUNTRACED);
+        } while (!WIFEXITED(status) && !WIFSIGNALED(status));
+    }
+
+    return 1;
+}
+
+int fishExecute(WordArray *array) {
+    int i;
+    if (array->size < 0)
+        return 1;
+
+    for (i=0; i < getNbBuiltins(); i++){
+        if (!strcmp(array->words[0], getBuiltinCommandsStr()[i])){
+            return getBuiltinCommands()[i](array);
+        }
+    }
+
+    return fishLoad(array);
+}

fish_shell/fish_core.h

@@ -2,17 +2,12 @@
 // Created by Antoine Bartuccio on 11/05/2017.
 //
 
-#ifndef FISH_FISH_LIB_H
-#define FISH_FISH_LIB_H
+#ifndef FISH_FISH_CORE_H
+#define FISH_FISH_CORE_H
 
-typedef struct {
-    char ** words;
-    int size;
-} WordArray;
 
-typedef struct {
-    char *PS1;
-} Settings;
+#include "fish_types.h"
+#include "fish_commands.h"
 
 /* WordArray functions */
 
@@ -34,4 +29,8 @@ int countSeparators(char *string, char *separators);
 
 char * fishExpand(char* line);
 
-#endif //FISH_FISH_LIB_H
+int fishLoad(WordArray *array);
+
+int fishExecute(WordArray *array);
+
+#endif //FISH_FISH_CORE_H

fish_shell/fish_types.h

@@ -0,0 +1,22 @@
+//
+// Created by Antoine Bartuccio on 14/05/2017.
+//
+
+#ifndef FISH_FISH_TYPES_H
+#define FISH_FISH_TYPES_H
+
+/* Custom types */
+
+typedef struct {
+    char ** words;
+    int size;
+} WordArray;
+
+typedef struct {
+    char *PS1;
+} Settings;
+
+
+typedef int (builtinCommand) (WordArray*);
+
+#endif //FISH_FISH_TYPES_H

main.c

@@ -1,5 +1,5 @@
 #include <stdlib.h>
-#include "fish_lib/fish_lib.h"
+#include "fish_shell/fish_core.h"
 
 int main() {
     /* todo load config file */