Add support in libxenstore for using the xenbus_dev store connection.

Also add simple read/write/rm clients for command line access to the
store (using the xenbus_dev store connection).
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

1 files changed, 130 insertions, 0 deletions

diff --git a/tools/xenstore/xenstore_client.c b/tools/xenstore/xenstore_client.c
new file mode 100644
index 0000000000..842aca33fe
--- /dev/null
+++ b/tools/xenstore/xenstore_client.c
@@ -0,0 +1,130 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2005 by Christian Limpach
+ *
+ */
+
+#include <err.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <xs.h>
+
+static void
+usage(const char *progname)
+{
+#if defined(CLIENT_read)
+    errx(1, "Usage: %s [-h] [-p] key [...]", progname);
+#elif defined(CLIENT_write)
+    errx(1, "Usage: %s [-h] key value [...]", progname);
+#elif defined(CLIENT_rm)
+    errx(1, "Usage: %s [-h] key [...]", progname);
+#endif
+}
+
+int
+main(int argc, char **argv)
+{
+    struct xs_handle *xsh;
+    bool success;
+    int ret = 0;
+#if defined(CLIENT_read)
+    char *val;
+    int prefix = 0;
+#endif
+
+    xsh = xs_domain_open();
+    if (xsh == NULL)
+	err(1, "xs_domain_open");
+
+    while (1) {
+	int c, index = 0;
+	static struct option long_options[] = {
+	    {"help", 0, 0, 'h'},
+#if defined(CLIENT_read)
+	    {"prefix", 0, 0, 'p'},
+#endif
+	    {0, 0, 0, 0}
+	};
+
+	c = getopt_long(argc, argv, "h"
+#if defined(CLIENT_read)
+			"p"
+#endif
+			, long_options, &index);
+	if (c == -1)
+	    break;
+
+	switch (c) {
+	case 'h':
+	    usage(argv[0]);
+	    /* NOTREACHED */
+#if defined(CLIENT_read)
+	case 'p':
+	    prefix = 1;
+	    break;
+#endif
+	}
+    }
+
+    if (optind == argc) {
+	usage(argv[0]);
+	/* NOTREACHED */
+    }
+#if defined(CLIENT_write)
+    if ((argc - optind) % 1) {
+	usage(argv[0]);
+	/* NOTREACHED */
+    }
+#endif
+
+    /* XXX maybe find longest common prefix */
+    success = xs_transaction_start(xsh, "/");
+    if (!success)
+	errx(1, "couldn't start transaction");
+
+    while (optind < argc) {
+#if defined(CLIENT_read)
+	val = xs_read(xsh, argv[optind], NULL);
+	if (val == NULL) {
+	    warnx("couldn't read path %s", argv[optind]);
+	    ret = 1;
+	    goto out;
+	}
+	if (prefix)
+	    printf("%s: ", argv[optind]);
+	printf("%s\n", val);
+	free(val);
+	optind++;
+#elif defined(CLIENT_write)
+	success = xs_write(xsh, argv[optind], argv[optind + 1],
+			   strlen(argv[optind + 1]), O_CREAT);
+	if (!success) {
+	    warnx("could not write path %s", argv[optind]);
+	    ret = 1;
+	    goto out;
+	}
+	optind += 2;
+#elif defined(CLIENT_rm)
+	success = xs_rm(xsh, argv[optind]);
+	if (!success) {
+	    warnx("could not remove path %s", argv[optind]);
+	    ret = 1;
+	    goto out;
+	}
+	optind++;
+#endif
+    }
+
+ out:
+    success = xs_transaction_end(xsh, ret ? true : false);
+    if (!success)
+	errx(1, "couldn't end transaction");
+
+    return ret;
+}