int
main (int argc, char **argv)
{
// faire en sorte qu'interactive_mode = 0 lorsque le shell est distant
if (interactive_mode)
{
using_history();
}
else
{
// mode distant
}
while (1){
if (my_yyparse () == 0) { /* L'analyse a abouti */
afficher_expr(ExpressionAnalysee);
status = evaluer_expr(ExpressionAnalysee);
//printf("Salut %s",ExpressionAnalysee->type);
fflush(stdout);
expression_free(ExpressionAnalysee);
}
else {
/* L'analyse de la ligne de commande a donn� une erreur */
}
}
return 0;
}
int
main (int argc, char **argv)
{
if(argc == 2)
interactive_mode = 0;
// faire en sorte qu'interactive_mode = 0 lorsque le shell est distant
if (interactive_mode)
{
using_history();
}
else
{
// mode distant
}
while (1){
if (my_yyparse () == 0) { /* L'analyse a abouti */
// afficher_expr(ExpressionAnalysee);
//printf("\n%s\n", ExpressionAnalysee->arguments[0]);
evaluer_expr(ExpressionAnalysee);
//echo(LongueurListe(ExpressionAnalysee->arguments), ExpressionAnalysee->arguments);
// printf("\n%s\n", choices[4]);
fflush(stdout);
expression_free(ExpressionAnalysee);
}
else {
/* L'analyse de la ligne de commande a donné une erreur */
}
}
wait(NULL);
return 0;
}
int evaluer_expr(Expression *e,int in,int out,int err,int bg){
pid_t pid;
switch (e->type)
{
case BG :{ /** Background **/
pid = fork();
if(pid == 0){
evaluer_expr(e -> gauche,0,1,2,1);
exit(0);
}
else{
waitpid(pid,NULL,WNOHANG);
}
};
break;
case PIPE :{/** PIPE **/
int tube[2];
if(pipe(tube) == -1){
perror("tube");
}
pid = fork();
if(pid == -1){
perror("fork");
}
else if(pid == 0){// Cas du fils
close(tube[0]);
evaluer_expr(e -> gauche,0,tube[1],2,0);
}
else{ //Cas du pére
close(tube[1]);
evaluer_expr(e -> droite,tube[0],1,2,0);
}
};
break;
case SEQUENCE :{/** SEQUENCE **/
pid = fork();
if(pid == 0){
evaluer_expr(e -> gauche,0,1,2,0);
exit(0);
}
else{
waitpid(pid,NULL,0);
evaluer_expr(e -> droite,0,1,2,0);
}
};
break;
case SEQUENCE_ET : {/** SEQUENCE ET **/
pid = fork();
int status_sequence_et;
if(pid == 0){
execvp(e -> gauche -> arguments[0], &e-> gauche-> arguments[0]);
perror(e -> gauche -> arguments[0]);
exit(1);
}
else{
wait(&status_sequence_et);
if(WEXITSTATUS(status_sequence_et) == 0){
evaluer_expr(e -> droite,0,1,2,0);
}
}
};
break;
case SEQUENCE_OU : {/** SEQUENCE OU **/
pid = fork();
if(pid == 0){
evaluer_expr(e -> gauche,0,1,2,0);
exit(0);
}
else{
waitpid(pid,NULL,0);
evaluer_expr(e -> droite,0,1,2,0);
}
};
break;
case REDIRECTION_I : {/** REDIRECTION INPUT **/
int fdin = open(e->arguments[0], O_RDONLY, 0666);
if(fdin == -1){
perror("open");
}
evaluer_expr(e->gauche,fdin,1,2,0);
};
break;
case REDIRECTION_O : {/** REDIRECTION OUTPUT **/
int fdout = open(e->arguments[0],O_CREAT | O_TRUNC | O_WRONLY, 0666);
if(fdout == -1){
perror("open");
}
evaluer_expr(e->gauche,0,fdout,2,0);
};
break;
case REDIRECTION_A : {/** REDIRECTION OUTPUT APPEND **/
int fdout = open(e->arguments[0],O_CREAT | O_APPEND | O_WRONLY, 0666);
if(fdout == -1){
perror("open");
}
evaluer_expr(e->gauche,0,fdout,2,0);
};
break;
case REDIRECTION_E : {/** REDIRECTION STDERR **/
int fderr = open(e->arguments[0],O_CREAT | O_TRUNC | O_WRONLY, 0666);
if(fderr == -1){
perror("open");
}
evaluer_expr(e->gauche,0,1,fderr,0);
};
break;
case REDIRECTION_EO : {/** REDIRECTION STDERR & OUTPUT **/
int fdout = open(e->arguments[0],O_CREAT | O_WRONLY, 0666);
int fderr = open(e->arguments[0],O_CREAT | O_TRUNC | O_WRONLY, 0666);
if((fderr == -1) ){
perror("open");
}
if((fdout == -1) ){
perror("open");
}
evaluer_expr(e->gauche,0,fdout,fderr,0);
};
break;
case VIDE :
break;
default : {/** COMMANDE SIMPLE & INTERNES **/
int intCmd = isCmdInt(e->arguments[0]);
if(intCmd != -1){
exec_cmd_int(intCmd,e);
break ;
}
else {
pid_t pid ;
pid = fork();
if(pid == 0){ // fils
if(in != 0){
dup2(in,0);
close(in);
}
if(out != 1){
dup2(out,1);
close(out);
}
if(err!=2){
dup2(err,2);
close(err);
}
execvp(e->arguments[0], &e->arguments[0]);
perror(e->arguments[0]);
exit(-1);
}else{ // pére
if(in != 0){
close(in);
}
if(out != 1){
close(out);
}
if(err!=2){
close(err);
}
if(!bg){
waitpid(pid, &status , 0);
status = WIFEXITED(status)?WEXITSTATUS(status):128+WTERMSIG(status);
return status;
}
}
}
};
break;
}
}
