2 files changed, 10 insertions, 2 deletions

diff --git a/stest.1 b/stest.1
index 1f590ec..bb48f45 100644
--- a/stest.1
+++ b/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
diff --git a/stest.c b/stest.c
index b4dba64..e1dcf36 100644
--- a/stest.c
+++ b/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 */