claugeas/AugFuncs.h

#include "AugSettings.h"
#include "augeas.h"
#include "map"

#ifndef BLUEWEST_AUGEAS_BLUEAUG_H
#define BLUEWEST_AUGEAS_BLUEAUG_H

class AugFuncs {

    static void testSource(const AugSettings& settings) {
        int r;
        struct augeas *aug;
        char *s;

        aug = aug_init(settings.root, settings.loadPath, AUG_NO_STDINC | AUG_NO_LOAD);

        r = aug_load_file(aug, "/etc/hosts");
        r = aug_source(aug, "/files/etc/hosts/1/ipaddr", nullptr);

        std::cout << "The value read from node: " << s << std::endl;

        aug_close(aug);
    }


/// Get the tree of the /etc/hosts file printed in the console
/// Implementation based on https://github.com/Nexenta/node-augeas/blob/756276c432cc9e506836800ac9d217bedbbef55c/libaugeas.cc#L784

public:
// This prints the actual file
    void printPreview(const AugSettings& settings, const std::string& matchPath, const std::string& filePath) {
        struct augeas *aug;
        int r;
        char *s;
        char *etc_hosts_fn = nullptr;
        FILE *hosts_fp = nullptr;
        char *hosts_txt = nullptr;

        aug = aug_init(settings.root, settings.loadPath, AUG_NO_STDINC | AUG_NO_LOAD);

        r = aug_load_file(aug, filePath.c_str());
        r = aug_preview(aug, matchPath.c_str(), &s);

        std::cout << s << std::endl;

        free(hosts_txt);
        free(s);
        aug_close(aug);
    }

    void printAugTree(
            const AugSettings& settings,
            const std::string& matchPath,
            const std::string& filePath
    ) {
        struct augeas *aug;
        int r;
        FILE *out = tmpfile();

        aug = aug_init(settings.root, settings.loadPath, AUG_NO_STDINC | AUG_NO_LOAD);

        r = aug_load_file(aug, filePath.c_str());
        r = aug_print(aug, out,matchPath.c_str());

        std::map <std::string, std::string> stdBindList;
        std::map <std::string , std::string>::iterator pos;

        char line[256];
        rewind(out);
        while (fgets(line, 256, out) != nullptr) {
            // remove end of line
            line[strlen(line) - 1] = '\0';
            std::string s = line;

            // skip comments
            if (s.find("#comment") != std::string::npos)
                continue;
            s = s.substr(matchPath.length() - 1);
            // split by '=' sign
            size_t eqpos = s.find(" = ");
            if (eqpos == std::string::npos)
                continue;
            // extract key and value
            std::string key = s.substr(0, eqpos);
            std::string value = s.substr(eqpos + 3);
            // remove '"' sign from around value
            value.erase(value.begin());
            value.erase(value.end() - 1);
            stdBindList.insert(std::pair<std::string,std::string>(key,value)); // 2

        }

        fclose(out);

        for (pos = stdBindList.begin();pos!=stdBindList.end();pos++)
        {
            std::cout << "Key: " << pos->first << ";" << " Value: " << pos->second << std::endl;
        }

        aug_close(aug);
    }
};


#endif //BLUEWEST_AUGEAS_BLUEAUG_H