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path: root/src/shutdown/s6-linux-init-hpr.c
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Diffstat (limited to 'src/shutdown/s6-linux-init-hpr.c')
-rw-r--r--src/shutdown/s6-linux-init-hpr.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/shutdown/s6-linux-init-hpr.c b/src/shutdown/s6-linux-init-hpr.c
new file mode 100644
index 0000000..c5f7afb
--- /dev/null
+++ b/src/shutdown/s6-linux-init-hpr.c
@@ -0,0 +1,107 @@
+/* ISC license. */
+
+#include <skalibs/nonposix.h>
+
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <utmpx.h>
+#include <sys/reboot.h>
+
+#include <skalibs/strerr2.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/sig.h>
+#include <skalibs/tai.h>
+#include <skalibs/djbunix.h>
+
+#include "defaults.h"
+#include "hpr.h"
+
+#ifndef UT_NAMESIZE
+#define UT_NAMESIZE 32
+#endif
+
+#ifndef UT_HOSTSIZE
+#define UT_HOSTSIZE 256
+#endif
+
+#ifndef _PATH_WTMP
+#define _PATH_WTMP "/dev/null/wtmp"
+#endif
+
+#define USAGE "s6-linux-init-hpr [ -h | -p | -r ] [ -d | -w ] [ -W ] [ -f ]"
+
+int main (int argc, char const *const *argv)
+{
+ int what = 0 ;
+ int force = 0 ;
+ int dowtmp = 1 ;
+ int dowall = 1 ;
+ PROG = "s6-linux-init-hpr" ;
+
+ {
+ subgetopt_t l = SUBGETOPT_ZERO ;
+ for (;;)
+ {
+ int opt = subgetopt_r(argc, argv, "hprfdwW", &l) ;
+ if (opt == -1) break ;
+ switch (opt)
+ {
+ case 'h' : what = 1 ; break ;
+ case 'p' : what = 2 ; break ;
+ case 'r' : what = 3 ; break ;
+ case 'f' : force = 1 ; break ;
+ case 'd' : dowtmp = 0 ; break ;
+ case 'w' : dowtmp = 2 ; break ;
+ case 'W' : dowall = 0 ; break ;
+ default : strerr_dieusage(100, USAGE) ;
+ }
+ }
+ argc -= l.ind ; argv += l.ind ;
+ }
+
+ if (!what)
+ strerr_dief1x(100, "one of the -h, -p or -r options must be given") ;
+
+ if (geteuid())
+ {
+ errno = EPERM ;
+ strerr_dief1sys(100, "nice try, peon") ;
+ }
+
+ if (force)
+ {
+ reboot(what == 3 ? RB_AUTOBOOT : what == 2 ? RB_POWER_OFF : RB_HALT_SYSTEM) ;
+ strerr_diefu1sys(111, "reboot()") ;
+ }
+
+ if (!tain_now_g()) strerr_warnw1sys("get current time") ;
+ if (dowtmp)
+ {
+ struct utmpx utx =
+ {
+ .ut_type = RUN_LVL,
+ .ut_pid = getpid(),
+ .ut_line = "~",
+ .ut_id = "",
+ .ut_session = getsid(0)
+ } ;
+ strncpy(utx.ut_user, what == 3 ? "reboot" : "shutdown", UT_NAMESIZE) ;
+ if (gethostname(utx.ut_host, UT_HOSTSIZE) < 0)
+ {
+ utx.ut_host[0] = 0 ;
+ strerr_warnwu1sys("gethostname") ;
+ }
+ else utx.ut_host[UT_HOSTSIZE - 1] = 0 ;
+ if (!timeval_from_tain(&utx.ut_tv, &STAMP))
+ strerr_warnwu1sys("timeval_from_tain") ;
+ updwtmpx(_PATH_WTMP, &utx) ;
+ }
+ if (dowall) hpr_wall(HPR_WALL_BANNER) ;
+ if (dowtmp < 2)
+ {
+ if (!hpr_shutdown(what, &STAMP, 0))
+ strerr_diefu1sys(111, "notify s6-linux-init-shutdownd") ;
+ }
+ return 0 ;
+}