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	Make command exec functions return an enum rather than -1/0/1 values and
add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
This commit is contained in:
		@@ -30,8 +30,8 @@
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 * Create a new session and attach to the current terminal unless -d is given.
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 */
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int	cmd_new_session_check(struct args *);
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int	cmd_new_session_exec(struct cmd *, struct cmd_ctx *);
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enum cmd_retval	 cmd_new_session_check(struct args *);
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enum cmd_retval	 cmd_new_session_exec(struct cmd *, struct cmd_ctx *);
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const struct cmd_entry cmd_new_session_entry = {
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	"new-session", "new",
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@@ -44,15 +44,15 @@ const struct cmd_entry cmd_new_session_entry = {
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	cmd_new_session_exec
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};
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int
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enum cmd_retval
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cmd_new_session_check(struct args *args)
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{
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	if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n')))
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		return (-1);
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	return (0);
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		return (CMD_RETURN_ERROR);
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	return (CMD_RETURN_NORMAL);
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}
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int
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enum cmd_retval
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cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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{
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	struct args		*args = self->args;
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@@ -71,11 +71,11 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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	if (newname != NULL) {
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		if (!session_check_name(newname)) {
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			ctx->error(ctx, "bad session name: %s", newname);
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			return (-1);
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			return (CMD_RETURN_ERROR);
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		}
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		if (session_find(newname) != NULL) {
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			ctx->error(ctx, "duplicate session: %s", newname);
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			return (-1);
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			return (CMD_RETURN_ERROR);
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		}
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	}
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@@ -83,7 +83,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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	if (target != NULL) {
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		groupwith = cmd_find_session(ctx, target, 0);
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		if (groupwith == NULL)
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			return (-1);
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			return (CMD_RETURN_ERROR);
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	} else
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		groupwith = NULL;
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@@ -131,7 +131,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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		if (server_client_open(ctx->cmdclient, NULL, &cause) != 0) {
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			ctx->error(ctx, "open terminal failed: %s", cause);
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			free(cause);
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			return (-1);
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			return (CMD_RETURN_ERROR);
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		}
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	}
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@@ -163,7 +163,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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			    args_get(args, 'x'), 1, USHRT_MAX, &errstr);
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			if (errstr != NULL) {
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				ctx->error(ctx, "width %s", errstr);
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				return (-1);
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				return (CMD_RETURN_ERROR);
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			}
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		}
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		if (args_has(args, 'y')) {
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@@ -171,7 +171,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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			    args_get(args, 'y'), 1, USHRT_MAX, &errstr);
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			if (errstr != NULL) {
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				ctx->error(ctx, "height %s", errstr);
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				return (-1);
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				return (CMD_RETURN_ERROR);
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			}
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		}
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	}
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@@ -202,7 +202,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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	if (s == NULL) {
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		ctx->error(ctx, "create session failed: %s", cause);
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		free(cause);
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		return (-1);
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		return (CMD_RETURN_ERROR);
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	}
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	environ_free(&env);
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@@ -269,5 +269,5 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
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		ARRAY_FREE(&cfg_causes);
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	}
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	return (!detached);	/* 1 means don't tell command client to exit */
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	return (detached ? CMD_RETURN_NORMAL : CMD_RETURN_ATTACH);
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}
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