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init: add re-exec capability

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This will allow the re-execution of the init process after upgrading
OpenRC.
This commit is contained in:
William Hubbs
2017-04-12 17:56:30 -05:00
parent 6f88ee4ec6
commit 05738bfce1
3 changed files with 37 additions and 6 deletions
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14
src/rc/openrc-shutdown.c
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@@ -35,11 +35,12 @@
const char *applet = NULL;
const char *extraopts = NULL;
const char *getoptstring = "kpr" getoptstring_COMMON;
const char *getoptstring = "HkpRr" getoptstring_COMMON;
const struct option longopts[] = {
{ "halt", no_argument, NULL, 'H'},
{ "kexec", no_argument, NULL, 'k'},
{ "poweroff", no_argument, NULL, 'p'},
{ "reexec", no_argument, NULL, 'R'},
{ "reboot", no_argument, NULL, 'r'},
longopts_COMMON
};
@@ -47,11 +48,13 @@ const char * const longopts_help[] = {
"halt the system",
"reboot the system using kexec",
"power off the system",
"re-execute init (use after upgrading)",
"reboot the system",
longopts_help_COMMON
};
const char *usagestring = NULL;
const char *exclusive = "Select one of --halt, --kexec, --poweroff or --reboot";
const char *exclusive = "Select one of "
"--halt, --kexec, --poweroff, --reexec or --reboot";
static void send_cmd(const char *cmd)
{
@@ -79,6 +82,7 @@ int main(int argc, char **argv)
bool do_kexec = false;
bool do_poweroff = false;
bool do_reboot = false;
bool do_reexec = false;
applet = basename_c(argv[0]);
if (geteuid() != 0)
@@ -99,6 +103,10 @@ if (geteuid() != 0)
do_poweroff = true;
cmd_count++;
break;
case 'R':
do_reexec = true;
cmd_count++;
break;
case 'r':
do_reboot = true;
cmd_count++;
@@ -118,5 +126,7 @@ if (geteuid() != 0)
send_cmd("poweroff");
else if (do_reboot)
send_cmd("reboot");
else if (do_reexec)
send_cmd("reexec");
return 0;
}