Server locking. set-password and lock-server commands, plus automatic locking.

cmd-set-password.c

@@ -0,0 +1,169 @@
+/* $Id: cmd-set-password.c,v 1.1 2009-01-11 00:48:42 nicm Exp $ */
+
+/*
+ * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+/*
+ * Set server password.
+ */
+
+int	cmd_set_password_parse(struct cmd *, int, char **, char **);
+void	cmd_set_password_exec(struct cmd *, struct cmd_ctx *);
+void	cmd_set_password_send(struct cmd *, struct buffer *);
+void	cmd_set_password_recv(struct cmd *, struct buffer *);
+void	cmd_set_password_free(struct cmd *);
+void	cmd_set_password_init(struct cmd *, int);
+void	cmd_set_password_print(struct cmd *, char *, size_t);
+
+struct cmd_set_password_data {
+	char	*password;
+	int	 flag_encrypted;
+};
+
+const struct cmd_entry cmd_set_password_entry = {
+	"set-password", "pass",
+	"[-c] password",
+	0,
+	cmd_set_password_init,
+	cmd_set_password_parse,
+	cmd_set_password_exec,
+	cmd_set_password_send,
+	cmd_set_password_recv,
+	cmd_set_password_free,
+	cmd_set_password_print
+};
+
+void
+cmd_set_password_init(struct cmd *self, unused int arg)
+{
+	struct cmd_set_password_data	 *data;
+
+	self->data = data = xmalloc(sizeof *data);
+	data->password = NULL;
+	data->flag_encrypted = 0;
+}
+
+int
+cmd_set_password_parse(struct cmd *self, int argc, char **argv, char **cause)
+{
+	struct cmd_set_password_data	*data;
+	int				 opt;
+	char				*out;
+
+	self->entry->init(self, 0);
+	data = self->data;
+
+	while ((opt = getopt(argc, argv, "c")) != -1) {
+		switch (opt) {
+		case 'c':
+			data->flag_encrypted = 1;
+			break;
+		default:
+			goto usage;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	if (argc != 1)
+		goto usage;
+
+	if (!data->flag_encrypted) {
+		if ((out = crypt(argv[0], "$1")) != NULL)
+			data->password = xstrdup(out);
+	} else
+		data->password = xstrdup(argv[0]);
+
+	return (0);
+
+usage:
+	xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
+
+	self->entry->free(self);
+	return (-1);
+}
+
+void
+cmd_set_password_exec(struct cmd *self, struct cmd_ctx *ctx)
+{
+	struct cmd_set_password_data	*data = self->data;
+
+	if (data->password == NULL) {
+		ctx->error(ctx, "failed to encrypt password");
+		return;
+	}
+
+	if (server_password != NULL)
+		xfree(server_password);
+	if (*data->password == '\0')
+		server_password = NULL;
+	else
+		server_password = xstrdup(data->password);
+	log_debug("pw now %s", server_password);
+
+ 	if (ctx->cmdclient != NULL)
+		server_write_client(ctx->cmdclient, MSG_EXIT, NULL, 0);
+}
+
+void
+cmd_set_password_send(struct cmd *self, struct buffer *b)
+{
+	struct cmd_set_password_data	*data = self->data;
+
+	buffer_write(b, data, sizeof *data);
+	cmd_send_string(b, data->password);
+}
+
+void
+cmd_set_password_recv(struct cmd *self, struct buffer *b)
+{
+	struct cmd_set_password_data	*data;
+
+	self->data = data = xmalloc(sizeof *data);
+	buffer_read(b, data, sizeof *data);
+	data->password = cmd_recv_string(b);
+}
+
+void
+cmd_set_password_free(struct cmd *self)
+{
+	struct cmd_set_password_data	*data = self->data;
+
+	if (data->password != NULL)
+		xfree(data->password);
+	xfree(data);
+}
+
+void
+cmd_set_password_print(struct cmd *self, char *buf, size_t len)
+{
+	struct cmd_set_password_data	*data = self->data;
+	size_t				 off = 0;
+
+	off += xsnprintf(buf, len, "%s", self->entry->name);
+	if (data == NULL)
+		return;
+	if (off < len && data->flag_encrypted)
+		off += xsnprintf(buf + off, len - off, " -c");
+	if (off < len && data->password != NULL)
+		off += xsnprintf(buf + off, len - off, " password");
+}