137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/* $OpenBSD$ */
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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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}
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