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/* $OpenBSD: cmd-show-environment.c,v 1.23 2017/04/22 10:22:39 nicm Exp $ */
/*
* 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 = { "gst:", 0, 1 },
.usage = "[-gs] " 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)
{
char *escaped;
if (!args_has(self->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 = self->args;
struct environ *env;
struct environ_entry *envent;
const char *target;
if ((target = args_get(args, 't')) != NULL) {
if (item->target.s == NULL) {
cmdq_error(item, "no such session: %s", target);
return (CMD_RETURN_ERROR);
}
}
if (args_has(self->args, 'g'))
env = global_environ;
else {
if (item->target.s == NULL) {
target = args_get(args, 't');
if (target != NULL)
cmdq_error(item, "no such session: %s", target);
else
cmdq_error(item, "no current session");
return (CMD_RETURN_ERROR);
}
env = item->target.s->environ;
}
if (args->argc != 0) {
envent = environ_find(env, args->argv[0]);
if (envent == NULL) {
cmdq_error(item, "unknown variable: %s", args->argv[0]);
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);
}
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