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openrc-shutdown: add dry-run option

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This commit is contained in:
William Hubbs
2017-05-22 12:42:37 -05:00
parent 0cfd0dd9ef
commit 1ece16bfcd
2 changed files with 23 additions and 11 deletions
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3
man/openrc-shutdown.8
View File

@@ -27,6 +27,9 @@ is the utility that communicates with openrc-init(8) to bring down the
system or instruct openrc-init to re-execute itself. It supports the
following options:
.Bl -tag -width "poweroff"
.It Fl d , -dry-run
Print the action that would be taken without executing it. This is to
allow testing.
.It Fl H , -halt
Stop all services, kill all remaining processes and halt the system.
.It Fl k , -kexec

31
src/rc/openrc-shutdown.c
View File

@@ -35,8 +35,9 @@
const char *applet = NULL;
const char *extraopts = NULL;
const char *getoptstring = "HkpRr" getoptstring_COMMON;
const char *getoptstring = "dHkpRr" getoptstring_COMMON;
const struct option longopts[] = {
{ "dry-run", no_argument, NULL, 'd'},
{ "halt", no_argument, NULL, 'H'},
{ "kexec", no_argument, NULL, 'k'},
{ "poweroff", no_argument, NULL, 'p'},
@@ -45,6 +46,7 @@ const struct option longopts[] = {
longopts_COMMON
};
const char * const longopts_help[] = {
"print actions instead of executing them",
"halt the system",
"reboot the system using kexec",
"power off the system",
@@ -56,13 +58,16 @@ const char *usagestring = NULL;
const char *exclusive = "Select one of "
"--halt, --kexec, --poweroff, --reexec or --reboot";
static void send_cmd(const char *cmd)
static void send_cmd(const char *cmd, bool dryrun)
{
FILE *fifo;
size_t ignored;
if (dryrun) {
einfo("Would send %s to init", cmd);
return;
}
fifo = fopen(RC_INIT_FIFO, "w");
if (!fifo) {
perror("fopen");
return;
@@ -78,6 +83,7 @@ int main(int argc, char **argv)
{
int opt;
int cmd_count = 0;
bool do_dryrun = false;
bool do_halt = false;
bool do_kexec = false;
bool do_poweroff = false;
@@ -85,12 +91,13 @@ int main(int argc, char **argv)
bool do_reexec = false;
applet = basename_c(argv[0]);
if (geteuid() != 0)
eerrorx("%s: you must be root\n", applet);
while ((opt = getopt_long(argc, argv, getoptstring,
longopts, (int *) 0)) != -1)
{
switch (opt) {
case 'd':
do_dryrun = true;
break;
case 'H':
do_halt = true;
cmd_count++;
@@ -114,21 +121,23 @@ if (geteuid() != 0)
case_RC_COMMON_GETOPT
}
}
if (geteuid() != 0 && ! do_dryrun)
eerrorx("%s: you must be root\n", applet);
if (cmd_count > 1) {
eerror("%s: %s\n", applet, exclusive);
usage(EXIT_FAILURE);
}
if (do_halt)
send_cmd("halt");
send_cmd("halt", do_dryrun);
else if (do_kexec)
send_cmd("kexec");
send_cmd("kexec", do_dryrun);
else if (do_poweroff)
send_cmd("poweroff");
send_cmd("poweroff", do_dryrun);
else if (do_reboot)
send_cmd("reboot");
send_cmd("reboot", do_dryrun);
else if (do_reexec)
send_cmd("reexec");
send_cmd("reexec", do_dryrun);
else
send_cmd("single");
send_cmd("single", do_dryrun);
return 0;
}