93 lines
1.5 KiB
C
93 lines
1.5 KiB
C
#include <stdio.h>
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#include <assert.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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void lire(char **, char **, char **);
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char * lireChaine3();
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void changeDirectory(char * path);
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int subString (const char *chaine, int debut, int fin, char *result);
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void erreur(char *s);
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int main(int argc, char **argv)
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{
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char **arg1, **arg2, **arg3;
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lire(arg1, arg2, arg3);
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if(strcmp(*arg1, "cd") == 0)
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{
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// On change de répertoire
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changeDirectory(*arg2);
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}
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}
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void changeDirectory(char * path)
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{
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if(strcmp(path, "") == 0)
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chdir(getenv("HOME"));
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else if(chdir(path) != 0 )
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erreur("Impossible de changer de répertoire");
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}
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void lire(char** arg1, char** arg2, char** arg3)
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{
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char *s;
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s = lireChaine3();
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*arg1 = strtok(s," ");
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*arg2 = strtok((char *)0," ");
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*arg3 = strtok((char *)0," ");
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}
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char *lireChaine3()
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{
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char *ptr, *ptr1;
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int c;
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int i=0;
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int nb=10;
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ptr=malloc(nb);
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assert(ptr);
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while((c=getchar()) != '\n' && c != EOF)
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{
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if (i==nb-1)
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{
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ptr1=malloc(nb=nb*2);
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assert(ptr1);
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ptr[i]='\0';
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strcpy(ptr1,ptr);
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free(ptr);
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ptr=ptr1;
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}
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ptr[i]=c;
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i++;
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}
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ptr[i]='\0';
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if(c == EOF && i == 0)
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ptr = NULL;
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else
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if (i+1 != nb)
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{
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ptr1=malloc(i+1);
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assert(ptr1);
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strcpy(ptr1,ptr);
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free(ptr);
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ptr=ptr1;
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}
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return ptr;
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}
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void erreur(char *s)
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{
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perror(s);
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exit(-2);
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}
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int subString (const char *chaine, int debut, int fin, char *result)
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{
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result[fin+1-debut] = '\0';
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memcpy (result, (char *)chaine+debut, fin+1-debut);
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return (fin+1-debut);
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}
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