GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/cmd-show-environment.c Lines: 0 45 0.0 %
Date: 2017-11-13 Branches: 0 32 0.0 %

Line Branch Exec Source
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/* $OpenBSD: cmd-show-environment.c,v 1.23 2017/04/22 10:22:39 nicm Exp $ */
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/*
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 * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include "tmux.h"
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/*
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 * Show environment.
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 */
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static enum cmd_retval	cmd_show_environment_exec(struct cmd *,
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			    struct cmdq_item *);
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static char	*cmd_show_environment_escape(struct environ_entry *);
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static void	 cmd_show_environment_print(struct cmd *, struct cmdq_item *,
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		     struct environ_entry *);
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const struct cmd_entry cmd_show_environment_entry = {
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	.name = "show-environment",
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	.alias = "showenv",
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	.args = { "gst:", 0, 1 },
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	.usage = "[-gs] " CMD_TARGET_SESSION_USAGE " [name]",
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	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
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	.flags = CMD_AFTERHOOK,
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	.exec = cmd_show_environment_exec
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};
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static char *
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cmd_show_environment_escape(struct environ_entry *envent)
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{
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	const char	*value = envent->value;
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	char		 c, *out, *ret;
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	out = ret = xmalloc(strlen(value) * 2 + 1); /* at most twice the size */
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	while ((c = *value++) != '\0') {
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		/* POSIX interprets $ ` " and \ in double quotes. */
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		if (c == '$' || c == '`' || c == '"' || c == '\\')
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			*out++ = '\\';
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		*out++ = c;
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	}
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	*out = '\0';
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	return (ret);
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}
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static void
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cmd_show_environment_print(struct cmd *self, struct cmdq_item *item,
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    struct environ_entry *envent)
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{
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	char	*escaped;
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	if (!args_has(self->args, 's')) {
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		if (envent->value != NULL)
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			cmdq_print(item, "%s=%s", envent->name, envent->value);
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		else
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			cmdq_print(item, "-%s", envent->name);
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		return;
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	}
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	if (envent->value != NULL) {
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		escaped = cmd_show_environment_escape(envent);
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		cmdq_print(item, "%s=\"%s\"; export %s;", envent->name, escaped,
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		    envent->name);
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		free(escaped);
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	} else
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		cmdq_print(item, "unset %s;", envent->name);
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}
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static enum cmd_retval
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cmd_show_environment_exec(struct cmd *self, struct cmdq_item *item)
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{
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	struct args		*args = self->args;
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	struct environ		*env;
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	struct environ_entry	*envent;
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	const char		*target;
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	if ((target = args_get(args, 't')) != NULL) {
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		if (item->target.s == NULL) {
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			cmdq_error(item, "no such session: %s", target);
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			return (CMD_RETURN_ERROR);
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		}
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	}
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	if (args_has(self->args, 'g'))
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		env = global_environ;
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	else {
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		if (item->target.s == NULL) {
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			target = args_get(args, 't');
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			if (target != NULL)
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				cmdq_error(item, "no such session: %s", target);
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			else
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				cmdq_error(item, "no current session");
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			return (CMD_RETURN_ERROR);
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		}
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		env = item->target.s->environ;
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	}
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	if (args->argc != 0) {
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		envent = environ_find(env, args->argv[0]);
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		if (envent == NULL) {
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			cmdq_error(item, "unknown variable: %s", args->argv[0]);
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			return (CMD_RETURN_ERROR);
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		}
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		cmd_show_environment_print(self, item, envent);
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		return (CMD_RETURN_NORMAL);
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	}
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	envent = environ_first(env);
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	while (envent != NULL) {
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		cmd_show_environment_print(self, item, envent);
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		envent = environ_next(envent);
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	}
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	return (CMD_RETURN_NORMAL);
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}