commit - 32ef0f5662bfe8b8891ba6341d3a27818fb55508
commit + 6b1d658d1224cd108d64a6c340d47b66ad99816d
blob - 1f590ecc937610c0244f7992dc4b5139016c295e
blob + bb48f45641b59bd8a32892c96a34a88abd7e6eaf
--- stest.1
+++ stest.1
@@ -13,7 +13,8 @@ stest \- filter a list of files by properties
 .B stest
 takes a list of files and filters by the files' properties, analogous to
 .IR test (1).
-Files which pass all tests are printed to stdout.
+Files which pass all tests are printed to stdout. If no files are given, stest
+reads files from stdin.
 .SH OPTIONS
 .TP
 .B \-a
blob - b4dba64d215dbac2135e7a5b7cf708ab4d53d2c8
blob + e1dcf36ed5079dfda7f77cd15b569a83d0c06f80
--- stest.c
+++ stest.c
@@ -3,6 +3,7 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
 
@@ -17,7 +18,7 @@ static struct stat old, new;
 int
 main(int argc, char *argv[]) {
 	struct dirent *d;
-	char buf[BUFSIZ];
+	char buf[BUFSIZ], *p;
 	DIR *dir;
 	int opt;
 
@@ -35,6 +36,12 @@ main(int argc, char *argv[]) {
 			fprintf(stderr, "usage: %s [-abcdefghlpqrsuwx] [-n file] [-o file] [file...]\n", argv[0]);
 			exit(2);
 		}
+	if(optind == argc)
+		while(fgets(buf, sizeof buf, stdin)) {
+			if((p = strchr(buf, '\n')))
+				*p = '\0';
+			test(buf, buf);
+		}
 	for(; optind < argc; optind++)
 		if(FLAG('l') && (dir = opendir(argv[optind]))) {
 			/* test directory contents */