c - 使用 libconfig 读取配置时出现 SIGSEGV

Question

我无法使用 C 和 libconfig 从我的配置文件中检索用户值。

configreader.h

#include <stdio.h>
#include <string.h>
#include <libconfig.h>
#ifndef CONFIGREADER_H_INCLUDED
#define CONFIGREADER_H_INCLUDED

char *userreader(){
    static const char *inputfile = "/opt/plaininc/config/handler.conf";
    config_t configreader;
    const char *userconfig;
    if(! config_read_file(&configreader, inputfile)){
        config_destroy(&configreader);
        exit(EXIT_FAILURE);

    }
    if (config_lookup_string(&configreader, "handler.user", &userconfig)){
        config_destroy(&configreader);
        return userconfig;

    } else {
        config_destroy(&configreader);
        exit(EXIT_FAILURE);

    }
}

#endif

CONFIG.c

    #include <stdio.h>
#include <stdlib.h>
#include "configreader.h"

int main(){
    const char *user = userreader();
    printf("%s", user);
}

GDB:

Program received signal SIGSEGV, Segmentation fault. 0xb7e63496 in free () from /lib/i386-linux-gnu/libc.so.6

Answer 1

您需要使用 config_init() 初始化 configreader .做:

config_t configreader;
const char *userconfig;
config_init(&configreader);
....