From a7f475ca04856ef8232364c5b0c3191566b0696c Mon Sep 17 00:00:00 2001
From: William Hubbs <w.d.hubbs@gmail.com>
Date: Mon, 14 May 2018 19:00:04 -0500
Subject: [PATCH] rc-service: add a --dry-run option

This is for #225.
---
 man/rc-service.8    | 6 ++++++
 src/rc/rc-service.c | 7 ++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/man/rc-service.8 b/man/rc-service.8
index 8f075de4..a0202a8e 100644
--- a/man/rc-service.8
+++ b/man/rc-service.8
@@ -35,6 +35,9 @@
 .Fl e , -exists
 .Ar service
 .Nm
+.Fl Z , -dry-run
+.Ar service
+.Nm
 .Fl l , -list
 .Nm
 .Fl r , -resolve
@@ -68,6 +71,9 @@ return 0 if it can find
 otherwise -1.
 .Fl r , -resolve
 does the same and also prints the full path of the service to stdout.
+.Pp
+.Fl Z , -dry-run
+prints out the commands it would execute rather than executing them.
 .Sh SEE ALSO
 .Xr openrc 8 ,
 .Xr stdout 3
diff --git a/src/rc/rc-service.c b/src/rc/rc-service.c
index 8e7b00dc..77f0336b 100644
--- a/src/rc/rc-service.c
+++ b/src/rc/rc-service.c
@@ -29,7 +29,7 @@
 
 const char *applet = NULL;
 const char *extraopts = NULL;
-const char *getoptstring = "ce:ilr:IN" getoptstring_COMMON;
+const char *getoptstring = "ce:ilr:INZ" getoptstring_COMMON;
 const struct option longopts[] = {
 	{ "exists",   1, NULL, 'e' },
 	{ "ifcrashed", 0, NULL, 'c' },
@@ -38,6 +38,7 @@ const struct option longopts[] = {
 	{ "ifnotstarted", 0, NULL, 'N' },
 	{ "list",     0, NULL, 'l' },
 	{ "resolve",  1, NULL, 'r' },
+	{ "dry-run",     0, NULL, 'Z' },
 	longopts_COMMON
 };
 const char * const longopts_help[] = {
@@ -48,6 +49,7 @@ const char * const longopts_help[] = {
 	"if the service is not started then run the command",
 	"list all available services",
 	"resolve the service name to an init script",
+	"dry run (show what would happen)",
 	longopts_help_COMMON
 };
 const char *usagestring = ""							\
@@ -112,6 +114,9 @@ int main(int argc, char **argv)
 			free(service);
 			return EXIT_SUCCESS;
 			/* NOTREACHED */
+		case 'Z':
+			setenv("IN_DRYRUN", "yes", 1);
+			break;
 
 		case_RC_COMMON_GETOPT
 		}