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/*
* Copyright (C) 2017 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include "sw_collector_dpkg.h"
typedef struct private_sw_collector_dpkg_t private_sw_collector_dpkg_t;
/**
* Private data of an sw_collector_dpkg_t object.
*/
struct private_sw_collector_dpkg_t {
/**
* Public members of sw_collector_dpkg_state_t
*/
sw_collector_dpkg_t public;
};
typedef struct {
/** public enumerator interface */
enumerator_t public;
/** dpkg output stream */
FILE *file;
/** current dpkg output line */
char line[BUF_LEN];
} dpkg_enumerator_t;
METHOD(enumerator_t, enumerate, bool,
dpkg_enumerator_t *this, va_list args)
{
char **package, **arch, **version, *state, *pos;
VA_ARGS_VGET(args, package, arch, version);
while (TRUE)
{
if (!fgets(this->line, BUF_LEN, this->file))
{
return FALSE;
}
*package = this->line;
pos = strchr(this->line, '\t');
if (!pos)
{
return FALSE;
}
*pos = '\0';
*arch = ++pos;
pos = strchr(pos, '\t');
if (!pos)
{
return FALSE;
}
*pos = '\0';
*version = ++pos;
pos = strchr(pos, '\t');
if (!pos)
{
return FALSE;
}
*pos = '\0';
state = ++pos;
pos = strchr(pos, '\n');
if (!pos)
{
return FALSE;
}
*pos = '\0';
if (streq(state, "install ok installed"))
{
return TRUE;
}
}
}
METHOD(enumerator_t, enumerator_destroy, void,
dpkg_enumerator_t *this)
{
pclose(this->file);
free(this);
}
METHOD(sw_collector_dpkg_t, create_sw_enumerator, enumerator_t*,
private_sw_collector_dpkg_t *this)
{
dpkg_enumerator_t *enumerator;
char cmd[] = "dpkg-query -W -f="
"\'${Package}\t${Architecture}\t${Version}\t${Status}\n\'";
FILE *file;
file = popen(cmd, "r");
if (!file)
{
DBG1(DBG_IMC, "failed to run dpgk-query command");
return NULL;
}
INIT(enumerator,
.public = {
.enumerate = enumerator_enumerate_default,
.venumerate = _enumerate,
.destroy = _enumerator_destroy,
},
.file = file,
);
return &enumerator->public;
}
METHOD(sw_collector_dpkg_t, destroy, void,
private_sw_collector_dpkg_t *this)
{
free(this);
}
/**
* Described in header.
*/
sw_collector_dpkg_t *sw_collector_dpkg_create(void)
{
private_sw_collector_dpkg_t *this;
INIT(this,
.public = {
.create_sw_enumerator = _create_sw_enumerator,
.destroy = _destroy,
},
);
return &this->public;
}
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