acl_action_type_t
pipe_action(milter_stage_t stage, char *stagename, var_t *mailspec, void *data,
int depth)
{
exp_t *exp = data;
var_t *v;
char *dest;
char *message;
int size;
acl_action_type_t a;
v = exp_eval(exp, mailspec);
if (v == NULL)
{
log_error("pipe_exec: exp_eval failed");
return ACL_ERROR;
}
if (v->v_type != VT_STRING)
{
log_error("pipe_exec: bad expression in mail.acl");
return ACL_ERROR;
}
dest = v->v_data;
log_message(LOG_ERR, mailspec, "pipe_exec: %s", dest);
size = milter_message(mailspec, &message);
if (size == -1)
{
log_error("pipe_exec: milter_message failed");
return ACL_ERROR;
}
if (strncmp(dest, "inet:", 5) == 0 || strncmp(dest, "unix:", 5) == 0)
{
a = pipe_socket(dest, message, size);
}
else
{
a = pipe_exec(dest, message, size);
}
free(message);
return a;
}
void pipes_loop(t_pipe pi, t_env *e, long tot)
{
int p[2];
pid_t pid;
char *cat[3];
if (*(pi.table + tot + pi.redir) && **(pi.table + tot + pi.redir) == '|')
{
if (pipe(p) == -1)
return (pipe_error("pipe() failed.", -1, e));
if ((pid = fork()) < 0)
return (pipe_error("fork() failed.", -1, e));
if (pid == 0)
{
if (pi.pipe)
{
dup2(pi.pipe, STDIN_FILENO);
close(pi.pipe);
pi.pipe = 0;
}
close(p[0]);
dup2(p[1], STDOUT_FILENO);
close(p[1]);
pipe_exec(*(pi.cmd + tot), e, 0);
}
else
{
close(p[1]);
waitpid(pid, &e->ret, 0);
if (e->ret)
return (pipe_error(NULL, p[0], e));
tot += pi.redir + 1;
pi.redir = 0;
if (*(pi.table + tot + pi.redir))
{
pi.pipe = p[0];
pipes_loop(pi, e, tot);
close(p[0]);
}
else
{
dup2(p[0], STDIN_FILENO);
close(p[0]);
pipe_exec(*(pi.cmd + tot + pi.redir), e, 1);
dup2(1, STDIN_FILENO);
}
tot += pi.redir + 1;
pi.redir = 0;
}
}
else if (*(pi.table + tot + pi.redir) && **(pi.table + tot + pi.redir) == '<')
{
if (pipe(p) == -1)
return (pipe_error("pipe() failed.", -1, e));
if ((pid = fork()) < 0)
return (pipe_error("fork() failed.", -1, e));
if (pid == 0)
{
if (pi.pipe)
{
dup2(pi.pipe, STDIN_FILENO);
close(pi.pipe);
pi.pipe = 0;
}
close(p[0]);
if (**(pi.cmd + tot + pi.redir))
dup2(p[1], STDOUT_FILENO);
close(p[1]);
int i = 0;
while (*(pi.table + tot + i) && **(pi.table + tot + i) == '<')
i++;
char *more[i + 1];
int j = 0;
more[j] = "cat";
while (*(pi.table + tot + j) && **(pi.table + tot + j) == '<')
{
more[j + 1] = **(pi.cmd + tot + j + 1);
j++;
}
more[j + 1] = NULL;
pipe_exec(more, e, 0);
}
else
{
close(p[1]);
waitpid(pid, &e->ret, 0);
if (e->ret)
return (pipe_error(NULL, p[0], e));
while (*(pi.table + tot + pi.redir) && **(pi.table + tot + pi.redir) == '<')
pi.redir++;
if (*(pi.table + tot + pi.redir))
{
pi.pipe = p[0];
pipes_loop(pi, e, tot);
close(p[0]);
}
else
{
dup2(p[0], STDIN_FILENO);
close(p[0]);
if (**(pi.cmd + tot))
pipe_exec(*(pi.cmd + tot), e, 1);
dup2(1, STDIN_FILENO);
}
}
}
else if (*(pi.table + tot + pi.redir) && **(pi.table + tot + pi.redir) == '>')
{
if ((pid = fork()) < 0)
return (pipe_error("fork() failed.", -1, e));
if (pid == 0)
{
if (pi.pipe)
{
dup2(pi.pipe, STDIN_FILENO);
close(pi.pipe);
pi.pipe = 0;
}
pi.redir++;
dup2(*(pi.fds + tot + pi.redir), STDOUT_FILENO);
close(*(pi.fds + tot + pi.redir));
if (tot + pi.redir - 2 >= 0 && **(pi.table + tot + pi.redir - 2) == '>')
{
cat[0] = "cat";
cat[1] = **(pi.cmd + tot + pi.redir - 1);
pipe_exec(cat, e, 0);
}
else if (**(pi.cmd + tot))
pipe_exec(*(pi.cmd + tot), e, 0);
else
{
cat[0] = "cat";
pipe_exec(cat, e, 0);
}
}
else
{
waitpid(pid, &e->ret, 0);
if (e->ret)
return (pipe_error(NULL, p[0], e));
pi.redir++;
if (*(pi.table + tot + pi.redir))
{
pi.pipe = *(pi.fds + tot + pi.redir);
pipes_loop(pi, e, tot);
}
}
}
}
