diff options
Diffstat (limited to 'sbin/reboot/reboot.c')
| -rw-r--r-- | sbin/reboot/reboot.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/sbin/reboot/reboot.c b/sbin/reboot/reboot.c index d927db0..fdef7d5 100644 --- a/sbin/reboot/reboot.c +++ b/sbin/reboot/reboot.c @@ -77,7 +77,7 @@ main(int argc, char *argv[]) } else howto = 0; lflag = nflag = qflag = 0; - while ((ch = getopt(argc, argv, "dk:lnpq")) != -1) + while ((ch = getopt(argc, argv, "dk:lnpqr")) != -1) switch(ch) { case 'd': howto |= RB_DUMP; @@ -98,6 +98,9 @@ main(int argc, char *argv[]) case 'q': qflag = 1; break; + case 'r': + howto |= RB_REROOT; + break; case '?': default: usage(); @@ -107,6 +110,8 @@ main(int argc, char *argv[]) if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT)) errx(1, "cannot dump (-d) when halting; must reboot instead"); + if ((howto & RB_REROOT) != 0 && howto != RB_REROOT) + errx(1, "-r cannot be used with -d, -n, or -p"); if (geteuid()) { errno = EPERM; err(1, NULL); @@ -137,6 +142,9 @@ main(int argc, char *argv[]) if (dohalt) { openlog("halt", 0, LOG_AUTH | LOG_CONS); syslog(LOG_CRIT, "halted by %s", user); + } else if (howto & RB_REROOT) { + openlog("reroot", 0, LOG_AUTH | LOG_CONS); + syslog(LOG_CRIT, "rerooted by %s", user); } else { openlog("reboot", 0, LOG_AUTH | LOG_CONS); syslog(LOG_CRIT, "rebooted by %s", user); @@ -170,6 +178,16 @@ main(int argc, char *argv[]) */ (void)signal(SIGPIPE, SIG_IGN); + /* + * Only init(8) can perform rerooting. + */ + if (howto & RB_REROOT) { + if (kill(1, SIGEMT) == -1) + err(1, "SIGEMT init"); + + return (0); + } + /* Just stop init -- if we fail, we'll restart it. */ if (kill(1, SIGTSTP) == -1) err(1, "SIGTSTP init"); |
