align_detector: Enumerate directory contents if necessary

2 files changed, 15 insertions, 0 deletions

diff --git a/libcrystfel/src/utils.c b/libcrystfel/src/utils.c
index 10e4c38e..44faa7ee 100644
--- a/libcrystfel/src/utils.c
+++ b/libcrystfel/src/utils.c
@@ -933,6 +933,20 @@ int file_exists(const char *filename)
 }
 
 
+int is_dir(const char *filename)
+{
+	struct stat statbuf;
+	int r;
+
+	r = stat(filename, &statbuf);
+	if ( r != 0 ) {
+		return 0;
+	}
+
+	return S_ISDIR(statbuf.st_mode);
+}
+
+
 int compare_double(const void *av, const void *bv)
 {
 	double a = *(double *)av;
diff --git a/libcrystfel/src/utils.h b/libcrystfel/src/utils.h
index 3a228b22..cb68069e 100644
--- a/libcrystfel/src/utils.h
+++ b/libcrystfel/src/utils.h
@@ -247,6 +247,7 @@ extern char *safe_strdup(const char *in);
 extern void strip_extension(char *bfn);
 extern char *load_entire_file(const char *filename);
 extern int file_exists(const char *filename);
+extern int is_dir(const char *filename);
 extern const char *filename_extension(const char *fn, const char **ext2);