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