[PATCH] Add an option to select non-matching files

---
 stest.1 | 3 +++
 stest.c | 8 +++++---
 2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/stest.1 b/stest.1
index bb48f45..18a1ba2 100644
--- a/stest.1
+++ b/stest.1
_AT_@ -67,6 +67,9 @@ Test that files are not empty.
 .B \-u
 Test that files have their set-user-ID flag set.
 .TP
+.B \-v
+Inverse the sense of matching, to select non-matching files.
+.TP
 .B \-w
 Test that files are writable.
 .TP
diff --git a/stest.c b/stest.c
index e1dcf36..813bd2b 100644
--- a/stest.c
+++ b/stest.c
_AT_@ -22,7 +22,7 @@ main(int argc, char *argv[]) {
 	DIR *dir;
 	int opt;
 
-	while((opt = getopt(argc, argv, "abcdefghln:o:pqrsuwx")) != -1)
+	while((opt = getopt(argc, argv, "abcdefghln:o:pqrsuwxv")) != -1)
 		switch(opt) {
 		case 'n': /* newer than file */
 		case 'o': /* older than file */
_AT_@ -59,8 +59,9 @@ main(int argc, char *argv[]) {
 void
 test(const char *path, const char *name) {
 	struct stat st, ln;
+	bool m;
 
-	if(!stat(path, &st) && (FLAG('a') || name[0] != '.')          /* hidden files      */
+	m = !stat(path, &st) && (FLAG('a') || name[0] != '.')          /* hidden files      */
 	&& (!FLAG('b') || S_ISBLK(st.st_mode))                        /* block special     */
 	&& (!FLAG('c') || S_ISCHR(st.st_mode))                        /* character special */
 	&& (!FLAG('d') || S_ISDIR(st.st_mode))                        /* directory         */
_AT_@ -75,7 +76,8 @@ test(const char *path, const char *name) {
 	&& (!FLAG('s') || st.st_size > 0)                             /* not empty         */
 	&& (!FLAG('u') || st.st_mode & S_ISUID)                       /* set-user-id flag  */
 	&& (!FLAG('w') || access(path, W_OK) == 0)                    /* writable          */
-	&& (!FLAG('x') || access(path, X_OK) == 0)) {                 /* executable        */
+	&& (!FLAG('x') || access(path, X_OK) == 0);                   /* executable        */
+	if((!FLAG('v') && m) || (FLAG('v') && !m)) {
 		if(FLAG('q'))
 			exit(0);
 		match = true;
-- 
1.8.2.1
--6TrnltStXW4iwmi0--