1 files changed, 57 insertions, 0 deletions
diff --git a/usr/kinit/fstype/main.c b/usr/kinit/fstype/main.c
new file mode 100644
index 0000000..9162bdf
--- /dev/null
+++ b/usr/kinit/fstype/main.c
@@ -0,0 +1,57 @@
+/*
+ * by rmk
+ *
+ * Detect filesystem type (on stdin) and output strings for two
+ * environment variables:
+ *  FSTYPE - filesystem type
+ *  FSSIZE - filesystem size (if known)
+ *
+ * We currently detect (in order):
+ *  gzip, cramfs, romfs, xfs, minix, ext3, ext2, reiserfs, jfs
+ *
+ * MINIX, ext3 and Reiserfs bits are currently untested.
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "fstype.h"
+
+char *progname;
+
+int main(int argc, char *argv[])
+{
+	int fd = 0;
+	int rv;
+	const char *fstype;
+	const char *file = "stdin";
+	unsigned long long bytes;
+
+	progname = argv[0];
+
+	if (argc > 2) {
+		fprintf(stderr, "Usage: %s [file]\n", progname);
+		return 1;
+	}
+
+	if (argc > 1 && !(argv[1][0] == '-' && argv[1][1] == '\0')) {
+		fd = open(file = argv[1], O_RDONLY);
+		if (fd < 0) {
+			perror(argv[1]);
+			return 2;
+		}
+	}
+
+	rv = identify_fs(fd, &fstype, &bytes, 0);
+	if (rv == -1) {
+		perror(file);
+		return 2;
+	}
+
+	fstype = fstype ? fstype : "unknown";
+
+	fprintf(stdout, "FSTYPE=%s\nFSSIZE=%llu\n", fstype, bytes);
+	return rv;
+}