Add -i, --ifexists so that we can do this

  rc-sercice -i foo -- restart
instead of this
  rc-service -e foo && rc-service foo -- restart

2 files changed, 29 insertions, 14 deletions

diff --git a/man/rc-service.8 b/man/rc-service.8
index 7d9f3981..b19bb23e 100644
--- a/man/rc-service.8
+++ b/man/rc-service.8
@@ -1,4 +1,4 @@
-.\" Copyright 2008 Roy Marples
+.\" Copyright 2008-2009 Roy Marples
 .\" All rights reserved
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd Mar 26, 2008
+.Dd May 1, 2009
 .Dt RC-SERVICE 8 SMM
 .Os OpenRC
 .Sh NAME
@@ -30,20 +30,26 @@
 .Nd locate and run an OpenRC service with the given arguments 
 .Sh SYNOPSIS
 .Nm
+.Op Fl i , -ifexists
 .Ar service cmd
 .Op Ar ...
 .Nm
-.Fl l , -list
-.Nm
 .Fl e , -exists
 .Ar service
 .Nm
+.Fl l , -list
+.Nm
 .Fl r , -resolve
 .Ar service
 .Sh DESCRIPTION
 Service scripts could be in different places on different systems. 
 .Nm
 locates the specified service and runs it with the given arguments.
+If
+.Fl i , -ifexists
+is given then
+.Nm
+returns 0 even if the service does not exist.
 .Pp
 If given the
 .Fl l , -list
@@ -51,11 +57,11 @@ argument then
 .Nm
 will list all available services.
 .Pp
-.Fl -e , exists
+.Fl e , -exists
 return 0 if it can find
 .Ar service ,
 otherwise -1.
-.Fl -r , resolve
+.Fl r , -resolve
 does the same and also prints the full path of the service to stdout.
 .Sh SEE ALSO
 .Xr rc 8 ,
diff --git a/src/rc/rc-service.c b/src/rc/rc-service.c
index 82d4cf22..84789f3c 100644
--- a/src/rc/rc-service.c
+++ b/src/rc/rc-service.c
@@ -43,15 +43,17 @@
 extern char *applet;
 
 #include "_usage.h"
-#define getoptstring "e:lr:" getoptstring_COMMON
+#define getoptstring "e:ilr:" getoptstring_COMMON
 static const struct option longopts[] = {
-	{ "exists",  1, NULL, 'e' },
-	{ "list",    0, NULL, 'l' },
-	{ "resolve", 1, NULL, 'r' },
+	{ "exists",   1, NULL, 'e' },
+	{ "ifexists", 0, NULL, 'i' },
+	{ "list",     0, NULL, 'l' },
+	{ "resolve",  1, NULL, 'r' },
 	longopts_COMMON
 };
 static const char * const longopts_help[] = {
 	"tests if the service exists or not",
+	"if the service exsits then run the command",
 	"list all available services",
 	"resolve the service name to an init script",
 	longopts_help_COMMON
@@ -65,6 +67,7 @@ rc_service(int argc, char **argv)
 	char *service;
 	RC_STRINGLIST *list;
 	RC_STRING *s;
+	bool if_exists = false;
 
 	/* Ensure that we are only quiet when explicitly told to be */
 	unsetenv("EINFO_QUIET");
@@ -81,9 +84,12 @@ rc_service(int argc, char **argv)
 #endif
 			return opt;
 			/* NOTREACHED */
+		case 'i':
+			if_exists = true;
+			break;
 		case 'l':
 			list = rc_services_in_runlevel(NULL);
-			if (!TAILQ_FIRST(list))
+			if (TAILQ_FIRST(list) == NULL)
 				return EXIT_FAILURE;
 			rc_stringlist_sort(&list);
 			TAILQ_FOREACH(s, list, entries)
@@ -95,7 +101,7 @@ rc_service(int argc, char **argv)
 			/* NOTREACHED */
 		case 'r':
 			service = rc_service_resolve(optarg);
-			if (!service)
+			if (service == NULL)
 				return EXIT_FAILURE;
 			printf("%s\n", service);
 #ifdef DEBUG_MEMORY
@@ -110,10 +116,13 @@ rc_service(int argc, char **argv)
 
 	argc -= optind;
 	argv += optind;
-	if (!*argv)
+	if (*argv == NULL)
 		eerrorx("%s: you need to specify a service", applet);
-	if (!(service = rc_service_resolve(*argv)))
+	if ((service = rc_service_resolve(*argv)) == NULL) {
+		if (if_exists)
+			return 0;
 		eerrorx("%s: service `%s' does not exist", applet, *argv);
+	}
 	*argv = service;
 	execv(*argv, argv);
 	eerrorx("%s: %s", applet, strerror(errno));