1 files changed, 64 insertions, 0 deletions
diff --git a/block_device.c b/block_device.c
new file mode 100644
index 0000000..87e7209
--- /dev/null
+++ b/block_device.c
@@ -0,0 +1,64 @@
+#include "internal.h"
+#include <dirent.h>
+#include <string.h>
+#include <stdio.h>
+
+const char	block_device_usage[] = "block_device mount-point";
+
+static dev_t *my_device;
+static char *my_device_name;
+
+int 
+match_mount(const struct FileInfo * i) {
+	if ( S_ISBLK(i->stat.st_mode) 
+	 && (i->stat.st_rdev == *my_device)) {
+		my_device_name=strdup(i->source);
+		return 1;
+	} else
+		return 0;
+}
+
+extern int
+block_device_main(struct FileInfo * i, int argc, char * * argv)
+{
+	char *device_name = block_device(argv[1],i);
+	if ( device_name == NULL )
+		return -1;
+	printf("%s\n", device_name);
+	exit(0);
+}
+
+char * block_device(const char *name, struct FileInfo *i)
+{
+	struct stat	s;
+        char *buf;
+	int dinam=0;
+
+	if ( stat(name, &s) ) return (char *) NULL;
+	if (!i) {
+	  i=(struct FileInfo*)malloc(sizeof(struct FileInfo));
+	  dinam = 1;
+	}
+	memset((void *)i, 0, sizeof(struct FileInfo));
+	my_device=(dev_t *)malloc(sizeof(dev_t));
+	*my_device = s.st_dev;
+	my_device_name = NULL;
+	i->source = "/dev";
+	i->stat = s;
+	i->processDirectoriesAfterTheirContents=1;
+	descend(i, match_mount);
+	if (dinam) free(i);
+	if ( my_device_name ) {
+                buf = strdup(my_device_name);
+		free(my_device);
+		free(my_device_name);
+		return buf;
+        } else {
+		fprintf( stderr
+		,"Can't find special file for block device %d, %d.\n"
+		,(int) *my_device >> 8 & 0xff
+		,(int) *my_device & 0xff);
+		free(my_device);
+		return (char *) NULL;
+	}
+}