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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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} |