lsmodconf.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "colors.h"
#include "lsmodconf.h"
#include "modules-3.16.1.h"

#define CONF_PRE "CONFIG_"
#define LINE_MAX 500
#define NAME_MAX 50

void lsmod_name(char *input_line, char *mod_name)
{
    int i = 0;

    while (input_line[i] != ' ') {
        mod_name[i] = input_line[i];
        i++;
    }

    mod_name[i] = '\0';
}

void config_name(char *mod_name, char *conf_name)
{
    int i = 0;
    int ilen = sizeof(modules) / sizeof(Module);
    Module *conf_mod = NULL;

    while (i < ilen) {
        if (strcmp(modules[i].mod_name, mod_name) == 0) {
            conf_mod = &modules[i];

            strcpy(conf_name, CONF_PRE);
            strcat(conf_name, (*conf_mod).conf_name);

            return;
        }

        i++;
    }
}

int main(int argc, char **argv)
{
    char mod_line[LINE_MAX];
    char conf_line[LINE_MAX];

    while (fgets(mod_line, LINE_MAX, stdin) != NULL) {
        char mod_name[NAME_MAX] = "";
        char conf_name[NAME_MAX] = "";

        lsmod_name(mod_line, mod_name);

        // Ignore the first line of lsmod's output
        if (strcmp(mod_name, "Module") == 0) continue;

        config_name(mod_name, conf_name);

        // Handle unknown module names
        if (conf_name[0] == '\0') {
            printf(ANSI_COLOR_YELLOW "# Module %s is not known to lsmodconf" ANSI_COLOR_RESET "\n", mod_name);
            continue;
        }

        char conf_name_from_line[NAME_MAX];
        unsigned short matched = 0;

        FILE* conf_file = fopen(argv[1], "r");
        while (fgets(conf_line, LINE_MAX, conf_file) != NULL) {
            strcpy(conf_name_from_line, conf_line);
            conf_name_from_line[strlen(conf_name)] = '\0';
            if (strcmp(conf_name_from_line, conf_name) == 0
                    && conf_line[strlen(conf_name)] == '=') {
                printf("%s", conf_line);
                matched = 1;
            }
        }
        fclose(conf_file);

        if (matched) continue;

        conf_file = fopen(argv[1], "r");
        while (fgets(conf_line, LINE_MAX, conf_file) != NULL) {
            strcpy(conf_name_from_line, "# ");
            strcat(conf_name_from_line, conf_name);
            strcat(conf_name_from_line, " is not set\n");
            if (strcmp(conf_name_from_line, conf_line) == 0) {
                printf("%s", conf_line);
                matched = 1;
            }
        }
        fclose(conf_file);

        if (matched) continue;

        printf(ANSI_COLOR_RED "# Config string %s for module %s could not be found. Perhaps there's a version mismatch?" ANSI_COLOR_RESET "\n",
                        conf_name, mod_name);
    }
}