From 73cff35173dd75b0254ae7cf9098c32822859de0 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Tue, 16 Apr 2019 20:37:01 +0000
Subject:  It builds! Tomorrow: skeletons for stage2, stage3 and runlevel
 scripts.

---
 src/init/s6-linux-init-telinit.c | 72 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/init/s6-linux-init-telinit.c

(limited to 'src/init/s6-linux-init-telinit.c')

diff --git a/src/init/s6-linux-init-telinit.c b/src/init/s6-linux-init-telinit.c
new file mode 100644
index 0000000..8678709
--- /dev/null
+++ b/src/init/s6-linux-init-telinit.c
@@ -0,0 +1,72 @@
+/* ISC license. */
+
+#include <string.h>
+#include <sys/wait.h>
+
+#include <skalibs/types.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#include <s6/config.h>
+
+#include <s6-linux-init/config.h>
+#include "initctl.h"
+
+#define USAGE "s6-linux-init-telinit runlevel"
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  char const *newargv[8] = { S6_EXTBINPREFIX "s6-sudo", "-e", "-T", "3600000", "--", RUNLEVELD_PATH, 0, 0 } ;
+  PROG = "s6-linux-init-telinit" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "c:p:s:m:d:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'c' : /* s6-linux-init may be called with these options, don't choke on them */
+        case 'p' :
+        case 's' :
+        case 'm' :
+        case 'd' : break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+
+  if (!argc) dieusage() ;
+  newargv[6] = argv[0] ;
+
+
+ /* specialcase 0 and 6: fork runlevel call then exec shutdown, instead of execing runlevel call */
+
+  if (!strcmp(argv[0], "0") || !strcmp(argv[0], "6"))
+  {
+    int wstat ;
+    pid_t pid = child_spawn0(newargv[0], newargv, envp) ;
+    if (!pid) strerr_diefu2sys(111, "spawn ", newargv[0]) ;
+    if (wait_pid(pid, &wstat) < 0) strerr_diefu1sys(111, "wait_pid") ;
+    if (WIFSIGNALED(wstat))
+    {
+      char fmt[UINT_FMT] ;
+      fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
+      strerr_dief3x(wait_estatus(wstat), newargv[0], " crashed with signal ", fmt) ;
+    }
+    else if (WEXITSTATUS(wstat))
+    {
+      char fmt[UINT_FMT] ;
+      fmt[uint_fmt(fmt, WEXITSTATUS(wstat))] = 0 ;
+      strerr_dief3x(wait_estatus(wstat), newargv[0], " died with exitcode ", fmt) ;
+    }
+    
+    newargv[0] = argv[0][0] == '6' ? S6_LINUX_INIT_BINPREFIX "reboot" : S6_LINUX_INIT_BINPREFIX "poweroff" ;
+    newargv[1] = 0 ;
+  }
+
+  xpathexec_run(newargv[0], newargv, envp) ;
+}
-- 
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