102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
|
#define _GNU_SOURCE
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <sys/wait.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <signal.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <setjmp.h>
|
||
|
|
#include "readcmd.h"
|
||
|
|
#include "jobs.h"
|
||
|
|
|
||
|
|
int prompting = 0;
|
||
|
|
int job_id = 1;
|
||
|
|
list jobs;
|
||
|
|
|
||
|
|
void handler_print(int signal_num, siginfo_t* info) {
|
||
|
|
if (contiens(&jobs, info->si_pid)) {
|
||
|
|
if (prompting) { printf("\n"); }
|
||
|
|
printf("[%d] --> (%d) %s\n", info->si_pid, signal_num, strsignal(signal_num));
|
||
|
|
supprimer(&jobs, info->si_pid);
|
||
|
|
job_id--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char *argv[]) {
|
||
|
|
|
||
|
|
extern int errno;
|
||
|
|
|
||
|
|
initialiser(&jobs);
|
||
|
|
|
||
|
|
struct sigaction action;
|
||
|
|
action.sa_flags = SA_SIGINFO; //| SA_RESTART;
|
||
|
|
action.sa_handler = handler_print;
|
||
|
|
sigemptyset(&action.sa_mask);
|
||
|
|
sigaction(SIGCHLD, &action, NULL);
|
||
|
|
|
||
|
|
|
||
|
|
char initcd[256], currentcd[256];
|
||
|
|
getcwd(initcd, 256);
|
||
|
|
|
||
|
|
while (1) {
|
||
|
|
getcwd(currentcd, 256);
|
||
|
|
printf("%s >>> ", currentcd);
|
||
|
|
prompting = 1;
|
||
|
|
struct cmdline* cmd = readcmd();
|
||
|
|
prompting = 0;
|
||
|
|
|
||
|
|
if (cmd == NULL || cmd->seq[0] == NULL) { // ligne vide, on skip
|
||
|
|
continue;
|
||
|
|
} else if (!strcmp(cmd->seq[0][0], "exit")) { // on quitte le shell
|
||
|
|
break;
|
||
|
|
} else if (!strcmp(cmd->seq[0][0], "cd")) { // cd
|
||
|
|
if (cmd->seq[0][1] == NULL) { // vide
|
||
|
|
chdir(initcd);
|
||
|
|
} else { // avec un path
|
||
|
|
chdir(cmd->seq[0][1]);
|
||
|
|
}
|
||
|
|
continue;
|
||
|
|
} else if (!strcmp(cmd->seq[0][0], "jobs")) {
|
||
|
|
afficher(&jobs);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
pid_t pidFils = fork();
|
||
|
|
|
||
|
|
if (pidFils == -1) {
|
||
|
|
fprintf(stderr, "ERROR: forking failed, %s\n", strerror(errno));
|
||
|
|
exit(errno);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pidFils == 0) { // fils
|
||
|
|
execvp(cmd->seq[0][0], cmd->seq[0]);
|
||
|
|
exit(errno); // si execlp échoue on exit avec une erreur
|
||
|
|
|
||
|
|
} else { // père
|
||
|
|
if (cmd->backgrounded) {
|
||
|
|
ajouter(&jobs, pidFils, job_id++);
|
||
|
|
} else {
|
||
|
|
jmp_buf env;
|
||
|
|
setjmp(env);
|
||
|
|
int codeTerm;
|
||
|
|
pid_t idFils = waitpid(pidFils, &codeTerm, 0); // on attend la fin de l'exec du fils
|
||
|
|
|
||
|
|
if (idFils == -1){
|
||
|
|
|
||
|
|
// todo : peut mieux faire ?
|
||
|
|
if (errno == 4) {
|
||
|
|
longjmp(env, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "ERROR: waiting for %d failed, (%d) %s\n", codeTerm, errno, strerror(errno));
|
||
|
|
exit(errno);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return EXIT_SUCCESS;
|
||
|
|
}
|