/* * add_user - create a new user ID */ static int add_user (const char *name, uid_t uid, gid_t gid) { struct passwd pwent; /* Check if this is a valid user name */ if (!is_valid_user_name (name)) { fprintf (stderr, _("%s: invalid user name '%s'\n"), Prog, name); return -1; } /* * I don't want to fill in the entire password structure members * JUST YET, since there is still more data to be added. So, I fill * in the parts that I have. */ pwent.pw_name = xstrdup (name); pwent.pw_uid = uid; pwent.pw_passwd = "x"; /* XXX warning: const */ pwent.pw_gid = gid; pwent.pw_gecos = ""; /* XXX warning: const */ pwent.pw_dir = ""; /* XXX warning: const */ pwent.pw_shell = ""; /* XXX warning: const */ return (pw_update (&pwent) == 0) ? -1 : 0; }
/* * check_pw_file - check the content of the passwd file */ static void check_pw_file (int *errors, bool *changed) { struct commonio_entry *pfe, *tpfe; struct passwd *pwd; struct spwd *spw; /* * Loop through the entire password file. */ for (pfe = __pw_get_head (); NULL != pfe; pfe = pfe->next) { /* * If this is a NIS line, skip it. You can't "know" what NIS * is going to do without directly asking NIS ... */ if (('+' == pfe->line[0]) || ('-' == pfe->line[0])) { continue; } /* * Start with the entries that are completely corrupt. They * have no (struct passwd) entry because they couldn't be * parsed properly. */ if (NULL == pfe->eptr) { /* * Tell the user this entire line is bogus and ask * them to delete it. */ puts (_("invalid password file entry")); printf (_("delete line '%s'? "), pfe->line); *errors += 1; /* * prompt the user to delete the entry or not */ if (!yes_or_no (read_only)) { continue; } /* * All password file deletions wind up here. This * code removes the current entry from the linked * list. When done, it skips back to the top of the * loop to try out the next list element. */ delete_pw: SYSLOG ((LOG_INFO, "delete passwd line '%s'", pfe->line)); *changed = true; __pw_del_entry (pfe); continue; } /* * Password structure is good, start using it. */ pwd = pfe->eptr; /* * Make sure this entry has a unique name. */ for (tpfe = __pw_get_head (); NULL != tpfe; tpfe = tpfe->next) { const struct passwd *ent = tpfe->eptr; /* * Don't check this entry */ if (tpfe == pfe) { continue; } /* * Don't check invalid entries. */ if (NULL == ent) { continue; } if (strcmp (pwd->pw_name, ent->pw_name) != 0) { continue; } /* * Tell the user this entry is a duplicate of * another and ask them to delete it. */ puts (_("duplicate password entry")); printf (_("delete line '%s'? "), pfe->line); *errors += 1; /* * prompt the user to delete the entry or not */ if (yes_or_no (read_only)) { goto delete_pw; } } /* * Check for invalid usernames. --marekm */ if (!is_valid_user_name (pwd->pw_name)) { printf (_("invalid user name '%s'\n"), pwd->pw_name); *errors += 1; } /* * Check for invalid user ID. */ if (pwd->pw_uid == (uid_t)-1) { printf (_("invalid user ID '%lu'\n"), (long unsigned int)pwd->pw_uid); *errors += 1; } /* * Make sure the primary group exists */ /* local, no need for xgetgrgid */ if (!quiet && (NULL == getgrgid (pwd->pw_gid))) { /* * No primary group, just give a warning */ printf (_("user '%s': no group %lu\n"), pwd->pw_name, (unsigned long) pwd->pw_gid); *errors += 1; } /* * Make sure the home directory exists */ if (!quiet && (access (pwd->pw_dir, F_OK) != 0)) { /* * Home directory doesn't exist, give a warning */ printf (_("user '%s': directory '%s' does not exist\n"), pwd->pw_name, pwd->pw_dir); *errors += 1; } /* * Make sure the login shell is executable */ if ( !quiet && ('\0' != pwd->pw_shell[0]) && (access (pwd->pw_shell, F_OK) != 0)) { /* * Login shell doesn't exist, give a warning */ printf (_("user '%s': program '%s' does not exist\n"), pwd->pw_name, pwd->pw_shell); *errors += 1; } /* * Make sure this entry exists in the /etc/shadow file. */ if (is_shadow) { spw = (struct spwd *) spw_locate (pwd->pw_name); if (NULL == spw) { printf (_("no matching password file entry in %s\n"), spw_file); printf (_("add user '%s' in %s? "), pwd->pw_name, spw_file); *errors += 1; if (yes_or_no (read_only)) { struct spwd sp; struct passwd pw; sp.sp_namp = pwd->pw_name; sp.sp_pwdp = pwd->pw_passwd; sp.sp_min = getdef_num ("PASS_MIN_DAYS", -1); sp.sp_max = getdef_num ("PASS_MAX_DAYS", -1); sp.sp_warn = getdef_num ("PASS_WARN_AGE", -1); sp.sp_inact = -1; sp.sp_expire = -1; sp.sp_flag = SHADOW_SP_FLAG_UNSET; sp.sp_lstchg = (long) time ((time_t *) 0) / SCALE; if (0 == sp.sp_lstchg) { /* Better disable aging than * requiring a password change */ sp.sp_lstchg = -1; } *changed = true; if (spw_update (&sp) == 0) { fprintf (stderr, _("%s: failed to prepare the new %s entry '%s'\n"), Prog, spw_dbname (), sp.sp_namp); exit (E_CANTUPDATE); } /* remove password from /etc/passwd */ pw = *pwd; pw.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */ if (pw_update (&pw) == 0) { fprintf (stderr, _("%s: failed to prepare the new %s entry '%s'\n"), Prog, pw_dbname (), pw.pw_name); exit (E_CANTUPDATE); } } } else { /* The passwd entry has a shadow counterpart. * Make sure no passwords are in passwd. */ if (strcmp (pwd->pw_passwd, SHADOW_PASSWD_STRING) != 0) { printf (_("user %s has an entry in %s, but its password field in %s is not set to 'x'\n"), pwd->pw_name, spw_file, pwd_file); *errors += 1; } } } } }