static int ChangeUser(const char *user)
{
struct passwd *pas;
const char *err_msg;
/*
* Obtain password entry and change privileges
*/
pas = getpwnam(user);
if (pas == 0) {
crondlog("\011failed to get uid for %s", user);
return (-1);
}
setenv("USER", pas->pw_name, 1);
setenv("HOME", pas->pw_dir, 1);
setenv("SHELL", DEFAULT_SHELL, 1);
/*
* Change running state to the user in question
*/
err_msg = change_identity_e2str(pas);
if (err_msg) {
crondlog("\011%s for user %s", err_msg, user);
return (-1);
}
if (chdir(pas->pw_dir) < 0) {
crondlog("\011chdir failed: %s: %m", pas->pw_dir);
if (chdir(TMPDIR) < 0) {
crondlog("\011chdir failed: %s: %m", TMPDIR);
return (-1);
}
}
return (pas->pw_uid);
}
void change_identity(const struct passwd *pw)
{
const char *err_msg = change_identity_e2str(pw);
if (err_msg)
bb_perror_msg_and_die("%s", err_msg);
}