karchnu/some-usable-scripts
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mini_shell should takes one file in argument to redirect the standard exit

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This commit is contained in:
Philippe Pittoli 2011-02-13 01:50:35 +01:00
parent 824a4f58b2
commit 822d1ecd3e
1 changed files with 37 additions and 13 deletions
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50
mini_shell.c
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@ -16,11 +16,17 @@ int subString (const char *chaine, int debut, int fin, char *result);
void erreur(char *s);
void executionArrierePlan(char *arg1, char **env);
void execution(char *arg1, char *arg2, char *arg3, char **env);
void quitter(int signal);
int main(int argc, char **argv, char **env)
{
int commandeInterne;
char *arg1, *arg2, *arg3;
signal(SIGHUP, quitter);
signal(SIGINT, quitter);
signal(SIGQUIT, quitter);
// Boucle principale qui attend les commandes
while(1)
{
@ -40,7 +46,7 @@ int main(int argc, char **argv, char **env)
if(strcmp(arg1, "exit") == 0)
{
commandeInterne = 1;
exit(0);
exit(EXIT_SUCCESS);
}
if(commandeInterne == 0)
{
@ -62,18 +68,29 @@ void execution(char *arg1, char *arg2, char *arg3, char **env)
{
if(strcmp(arg2, "&") == 0)
executionArrierePlan(arg1, env);
if(strcmp(arg2, "<") == 0)
else
{
if((pid = fork()) == 0)
{
int fd0;
if((fd0 = open(arg3, O_RDONLY)) == -1)
int fd0,fd1;
if(strcmp(arg2, "<") == 0)
{
erreur("Ouverture fichier");
exit(EXIT_FAILURE);
if((fd0 = open(arg3, O_RDONLY)) == -1)
{
erreur("Ouverture fichier");
exit(EXIT_FAILURE);
}
close(0); dup(fd0); // Redirection de l'entrée standard
}
if(strcmp(arg2, ">") == 0)
{
if((fd1 = open(arg3, O_WRONLY | O_CREAT | O_TRUNC , 0666)) == -1)
{
erreur("Redirection sortie standard vers fichier");
exit(EXIT_FAILURE);
}
close(1); dup(fd1);
}
close(0); dup(fd0); // Redirection de l'entrée standard
execvpe(arg1, options, env);
erreur("execvpe n'a pas fonctionné");
exit(EXIT_FAILURE);
@ -85,8 +102,9 @@ void execution(char *arg1, char *arg2, char *arg3, char **env)
erreur("Soucis avec le fils");
}
}
}
else // exécution basique
{
if((pid = fork()) == 0)
@ -98,6 +116,7 @@ void execution(char *arg1, char *arg2, char *arg3, char **env)
else
waitpid(pid, &status, 0);
}
free(options);
}
void changeDirectory(char * path)
{
@ -109,7 +128,7 @@ void changeDirectory(char * path)
else
{
DIR * repertoire = opendir(path); // A REPRENDRE
struct dirent rep = readdir(repertoire);
struct dirent * rep = readdir(repertoire);
if(chdir(path) != 0)
erreur("Impossible de changer de répertoire");
else
@ -201,13 +220,13 @@ void executionArrierePlan(char *arg1, char **env)
if((pid = fork()) == 0)
{
close(pipefd[1]);
int temp, fd0, fd1, fd2, pid;
if((fd0 = open("/dev/null", O_RDONLY)) == -1)
int temp, fd00, fd01, fd02, pid;
if((fd00 = open("/dev/null", O_RDONLY)) == -1)
{
erreur("Ouverture fichier null");
exit(EXIT_FAILURE);
}
exit(0);
exit(EXIT_SUCCESS);
}
else
{
@ -218,3 +237,8 @@ void executionArrierePlan(char *arg1, char **env)
{
}
}
void quitter(int signal)
{
printf("\nVous avez indiqué le signal avec le numéro : %d\n", signal);
exit(EXIT_SUCCESS);
}