shithub: watch

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Add the -1 flag for running once and exiting

This lets us block waiting until a file changes

	watch -1 -e changeme exit

--- a/watch.c

+++ b/watch.c

@@ -14,6 +14,7 @@

 char pwd[1024];

 int period = 1000;

 int noregroup = 0;

+int once = 0;

 List *expl;

 List *filel;

@@ -192,6 +193,8 @@

 		break;

 	case 'G':

 		noregroup = 1; break;

+	case '1':

+		once = 1; break;

 	default: usage();

 	}ARGEND;

 	if(expl == nil)

@@ -205,5 +208,6 @@

 	for(;;){

 		watch();

 		rc(cmd);

+		if(once) exits(nil);

 	}

 }