env.c
author Myhailo Danylenko <isbear@ukrpost.net>
Mon, 07 Dec 2009 01:04:25 +0200
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child 5 da2fdd072650
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/*
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 * env.c                -- Tampering with mcabber's environment
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 *
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 * Copyrigth (C) 2009      Myhailo Danylenko <isbear@ukrpost.net>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or (at
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 * your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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 * USA
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 */
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#include <glib.h>
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#include <gmodule.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include "utils.h"
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#include "compl.h"
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#include "logprint.h"
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extern char **environ;
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// /env [option [= [value]]]
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static void do_env (char *arg)
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{
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	if (!*arg) {
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		// print full variables list
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		GSList  *vars   = NULL;
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		int      max    = 0;
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		{
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			char   **envvar;
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			for (envvar = environ; *envvar; ++envvar) {
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				char *end = strchr (*envvar, '=');
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				if (end) {
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					int   len  = end - *envvar;
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					char *name = g_strndup (*envvar, len);
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					if (len > max)
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						max = len;
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					vars = g_slist_prepend (vars, name);
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				}
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			}
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		}
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		if (max) {
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			gchar  *format = g_strdup_printf ("Env %%-%ds = %%s", max);
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			GSList *eel;
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			vars = g_slist_sort (vars, (GCompareFunc) strcmp);
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			for (eel = vars; eel; eel = eel->next) {
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				char *name  = (char *) eel->data;
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				char *value = getenv (name);
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				scr_LogPrint (LPRINT_NORMAL, format, name, value);
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				g_free (name);
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			}
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			g_free (format);
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		}
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		g_slist_free (vars);
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	} else {
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		char *varend = strchr (arg, '=');
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		if (!varend) {
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			// print variable alone
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			char *value = getenv (arg);
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			if (value)
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				scr_LogPrint (LPRINT_NORMAL, "Env %s = %s", arg, value);
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		} else if (varend == arg)
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				scr_LogPrint (LPRINT_NORMAL, "You must specify variable name.");
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		else {
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			char *argstart = varend + 1;
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			char *var;
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			for (varend--; varend > arg && *varend == ' '; --varend);
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			var = g_strndup (arg, varend - arg + 1);
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			while (!*argstart && *argstart == ' ')
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				++argstart;
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			if (*argstart)
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				// set variable
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				setenv (var, argstart, 1);
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			else
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				// unset variable
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				unsetenv (var);
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			g_free (var);
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		}
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	}
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}
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// /cd [path]
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static void do_cd (char *arg)
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{
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	if (!*arg) { // get
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		char cwd[256];
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		if (getcwd (cwd, 256) == NULL)
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			scr_LogPrint (LPRINT_NORMAL, "Cannot obtain current working directory: %s.", strerror (errno));
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		else
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			scr_LogPrint (LPRINT_NORMAL, "%s", cwd);
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	} else if (chdir (arg) == -1) // set
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		scr_LogPrint (LPRINT_NORMAL, "Cannot change current working directory: %s.", strerror (errno));
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}
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const gchar *g_module_check_init(GModule *module)
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{
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	// command
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	cmd_add ("env", "", 0, 0, do_env, NULL);
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	cmd_add ("cd", "", COMPL_FILENAME, 0, do_cd, NULL);
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	return NULL;
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}
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void g_module_unload(GModule *module)
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{
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	// command
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	cmd_del ("cd");
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	cmd_del ("env");
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}
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/* vim: se ts=4 sw=4: */