Return to sw_collector_dpkg.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / strongswan / src / sw-collector

Strongswan

    1: /*
    2:  * Copyright (C) 2017 Andreas Steffen
    3:  * HSR Hochschule fuer Technik Rapperswil
    4:  *
    5:  * This program is free software; you can redistribute it and/or modify it
    6:  * under the terms of the GNU General Public License as published by the
    7:  * Free Software Foundation; either version 2 of the License, or (at your
    8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
    9:  *
   10:  * This program is distributed in the hope that it will be useful, but
   11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   13:  * for more details.
   14:  */
   15: 
   16: #define _GNU_SOURCE
   17: #include <stdio.h>
   18: 
   19: #include "sw_collector_dpkg.h"
   20: 
   21: typedef struct private_sw_collector_dpkg_t private_sw_collector_dpkg_t;
   22: 
   23: /**
   24:  * Private data of an sw_collector_dpkg_t object.
   25:  */
   26: struct private_sw_collector_dpkg_t {
   27: 
   28: 	/**
   29: 	 * Public members of sw_collector_dpkg_state_t
   30: 	 */
   31: 	sw_collector_dpkg_t public;
   32: 
   33: };
   34: 
   35: typedef struct {
   36: 	/** public enumerator interface */
   37: 	enumerator_t public;
   38: 	/** dpkg output stream */
   39: 	FILE *file;
   40: 	/** current dpkg output line */
   41: 	char line[BUF_LEN];
   42: } dpkg_enumerator_t;
   43: 
   44: METHOD(enumerator_t, enumerate, bool,
   45: 	dpkg_enumerator_t *this, va_list args)
   46: {
   47: 	char **package, **arch, **version, *state, *pos;
   48: 
   49: 	VA_ARGS_VGET(args, package, arch, version);
   50: 
   51: 	while (TRUE)
   52: 	{
   53: 		if (!fgets(this->line, BUF_LEN, this->file))
   54: 		{
   55: 			return FALSE;
   56: 		}
   57: 
   58: 		*package = this->line;
   59: 		pos = strchr(this->line, '\t');
   60: 		if (!pos)
   61: 		{
   62: 			return FALSE;
   63: 		}
   64: 		*pos = '\0';
   65: 
   66: 		*arch = ++pos;
   67: 		pos = strchr(pos, '\t');
   68: 		if (!pos)
   69: 		{
   70: 			return FALSE;
   71: 		}
   72: 		*pos = '\0';
   73: 
   74: 		*version = ++pos;
   75: 		pos = strchr(pos, '\t');
   76: 		if (!pos)
   77: 		{
   78: 			return FALSE;
   79: 		}
   80: 		*pos = '\0';
   81: 
   82: 		state = ++pos;
   83: 		pos = strchr(pos, '\n');
   84: 		if (!pos)
   85: 		{
   86: 			return FALSE;
   87: 		}
   88: 		*pos = '\0';
   89: 
   90: 		if (streq(state, "install ok installed"))
   91: 		{
   92: 			return TRUE;
   93: 		}
   94: 	}
   95: }
   96: 
   97: METHOD(enumerator_t, enumerator_destroy, void,
   98: 	dpkg_enumerator_t *this)
   99: {
  100: 	pclose(this->file);
  101: 	free(this);
  102: }
  103: 
  104: METHOD(sw_collector_dpkg_t, create_sw_enumerator, enumerator_t*,
  105: 	private_sw_collector_dpkg_t *this)
  106: {
  107: 	dpkg_enumerator_t *enumerator;
  108: 	char cmd[] = "dpkg-query -W -f="
  109: 				 "\'${Package}\t${Architecture}\t${Version}\t${Status}\n\'";
  110: 	FILE *file;
  111: 
  112: 	file = popen(cmd, "r");
  113: 	if (!file)
  114: 	{
  115: 		DBG1(DBG_IMC, "failed to run dpgk-query command");
  116: 		return NULL;
  117: 	}
  118: 
  119: 	INIT(enumerator,
  120: 		.public = {
  121: 			.enumerate = enumerator_enumerate_default,
  122: 			.venumerate = _enumerate,
  123: 			.destroy = _enumerator_destroy,
  124: 		},
  125: 		.file = file,
  126: 	);
  127: 
  128: 	return &enumerator->public;
  129: }
  130: 
  131: METHOD(sw_collector_dpkg_t, destroy, void,
  132: 	private_sw_collector_dpkg_t *this)
  133: {
  134: 	free(this);
  135: }
  136: 
  137: /**
  138:  * Described in header.
  139:  */
  140: sw_collector_dpkg_t *sw_collector_dpkg_create(void)
  141: {
  142: 	private_sw_collector_dpkg_t *this;
  143: 
  144: 	INIT(this,
  145: 		.public = {
  146: 			.create_sw_enumerator = _create_sw_enumerator,
  147: 			.destroy = _destroy,
  148: 		},
  149: 	);
  150: 
  151: 	return &this->public;
  152: }