1 files changed, 143 insertions, 0 deletions
diff --git a/cmd-show-environment.c b/cmd-show-environment.c
new file mode 100644
index 0000000..b52db36
--- /dev/null
+++ b/cmd-show-environment.c
@@ -0,0 +1,143 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Show environment.
+ */
+
+static enum cmd_retval	cmd_show_environment_exec(struct cmd *,
+			    struct cmdq_item *);
+
+static char	*cmd_show_environment_escape(struct environ_entry *);
+static void	 cmd_show_environment_print(struct cmd *, struct cmdq_item *,
+		     struct environ_entry *);
+
+const struct cmd_entry cmd_show_environment_entry = {
+	.name = "show-environment",
+	.alias = "showenv",
+
+	.args = { "hgst:", 0, 1, NULL },
+	.usage = "[-hgs] " CMD_TARGET_SESSION_USAGE " [name]",
+
+	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
+
+	.flags = CMD_AFTERHOOK,
+	.exec = cmd_show_environment_exec
+};
+
+static char *
+cmd_show_environment_escape(struct environ_entry *envent)
+{
+	const char	*value = envent->value;
+	char		 c, *out, *ret;
+
+	out = ret = xmalloc(strlen(value) * 2 + 1); /* at most twice the size */
+	while ((c = *value++) != '\0') {
+		/* POSIX interprets $ ` " and \ in double quotes. */
+		if (c == '$' || c == '`' || c == '"' || c == '\\')
+			*out++ = '\\';
+		*out++ = c;
+	}
+	*out = '\0';
+
+	return (ret);
+}
+
+static void
+cmd_show_environment_print(struct cmd *self, struct cmdq_item *item,
+    struct environ_entry *envent)
+{
+	struct args	*args = cmd_get_args(self);
+	char		*escaped;
+
+	if (!args_has(args, 'h') && (envent->flags & ENVIRON_HIDDEN))
+		return;
+	if (args_has(args, 'h') && (~envent->flags & ENVIRON_HIDDEN))
+		return;
+
+	if (!args_has(args, 's')) {
+		if (envent->value != NULL)
+			cmdq_print(item, "%s=%s", envent->name, envent->value);
+		else
+			cmdq_print(item, "-%s", envent->name);
+		return;
+	}
+
+	if (envent->value != NULL) {
+		escaped = cmd_show_environment_escape(envent);
+		cmdq_print(item, "%s=\"%s\"; export %s;", envent->name, escaped,
+		    envent->name);
+		free(escaped);
+	} else
+		cmdq_print(item, "unset %s;", envent->name);
+}
+
+static enum cmd_retval
+cmd_show_environment_exec(struct cmd *self, struct cmdq_item *item)
+{
+	struct args		*args = cmd_get_args(self);
+	struct cmd_find_state	*target = cmdq_get_target(item);
+	struct environ		*env;
+	struct environ_entry	*envent;
+	const char		*tflag, *name = args_string(args, 0);
+
+	if ((tflag = args_get(args, 't')) != NULL) {
+		if (target->s == NULL) {
+			cmdq_error(item, "no such session: %s", tflag);
+			return (CMD_RETURN_ERROR);
+		}
+	}
+
+	if (args_has(args, 'g'))
+		env = global_environ;
+	else {
+		if (target->s == NULL) {
+			tflag = args_get(args, 't');
+			if (tflag != NULL)
+				cmdq_error(item, "no such session: %s", tflag);
+			else
+				cmdq_error(item, "no current session");
+			return (CMD_RETURN_ERROR);
+		}
+		env = target->s->environ;
+	}
+
+	if (name != NULL) {
+		envent = environ_find(env, name);
+		if (envent == NULL) {
+			cmdq_error(item, "unknown variable: %s", name);
+			return (CMD_RETURN_ERROR);
+		}
+		cmd_show_environment_print(self, item, envent);
+		return (CMD_RETURN_NORMAL);
+	}
+
+	envent = environ_first(env);
+	while (envent != NULL) {
+		cmd_show_environment_print(self, item, envent);
+		envent = environ_next(envent);
+	}
+	return (CMD_RETURN_NORMAL);
+}