* Implement ioctl support. On high level interface only

"restricted" ioctls are supported (which are defined with the
_IO(), _IOR(), _IOW() or _IOWR() macros).  Unrestricted ioctls
will only be allwed to CUSE (Character Device in Userspace)
servers.  Patch by Tejun Heo

1 files changed, 66 insertions, 0 deletions

diff --git a/example/fioclient.c b/example/fioclient.c
new file mode 100644
index 0000000..3ab63b2
--- /dev/null
+++ b/example/fioclient.c
@@ -0,0 +1,66 @@
+/*
+  FUSE fioclient: FUSE ioctl example client
+  Copyright (C) 2008       SUSE Linux Products GmbH
+  Copyright (C) 2008       Tejun Heo <teheo@suse.de>
+
+  This program can be distributed under the terms of the GNU GPL.
+  See the file COPYING.
+
+  gcc -Wall fioclient.c -o fioclient
+*/
+
+#include <sys/types.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include "fioc.h"
+
+const char *usage =
+"Usage: fioclient FIOC_FILE [SIZE]\n"
+"\n"
+"       get size if SIZE is omitted, set size otherwise\n"
+"\n";
+
+int main(int argc, char **argv)
+{
+	size_t size;
+	int fd;
+
+	if (argc < 2) {
+		goto usage;
+	}
+
+	fd = open(argv[1], O_RDWR);
+	if (fd < 0) {
+		perror("open");
+		return 1;
+	}
+
+	if (argc == 2) {
+		if (ioctl(fd, FIOC_GET_SIZE, &size)) {
+			perror("ioctl");
+			return 1;
+		}
+		printf("%zu\n", size);
+	} else {
+		char *endp;
+
+		size = strtoul(argv[2], &endp, 0);
+		if (endp == argv[2] || *endp != '\0')
+			goto usage;
+
+		if (ioctl(fd, FIOC_SET_SIZE, &size)) {
+			perror("ioctl");
+			return 1;
+		}
+	}
+	return 0;
+
+usage:
+	fprintf(stderr, usage);
+	return 1;
+}