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

#define TRUNC_AT(str, reject) {\
    size_t s_len = strcspn(str, reject); \
    str[s_len] = '\0';\
}

#define TENTRY(x) {cmd[IDX_##x], IDX_##x}

#define BUF_SIZE (1024*1024)

#define IDX_SKB      0
#define IDX_I3STATUS 1

char buf[2][BUF_SIZE] = {"", ""};

pthread_mutex_t m;
const char *cmd[] = {
    "/home/dmitriy/bin/skb",
    "/usr/bin/python3 /home/dmitriy/bin/config.py"
};

struct tinfo {
    const char *cmd;
    int idx;
};

int first = 3;

void *callback(void *arg){
    struct tinfo *ti = (struct tinfo *) arg;
    FILE *fd = popen(ti->cmd, "r");
    while (fgets(buf[ti->idx], BUF_SIZE, fd)){
        pthread_mutex_lock(&m);
        if (first) {
            if (ti->idx == IDX_I3STATUS) {
                printf("%s", buf[ti->idx]);
                fflush(stdout);
                first--;
            }
        } else {
            TRUNC_AT(buf[IDX_I3STATUS], "]");
            TRUNC_AT(buf[IDX_SKB], "\n");
            printf("%s,{\"name\": \"lang\", \"full_text\": \"%s\"}]\n",
                    buf[IDX_I3STATUS], buf[IDX_SKB]);
            fflush(stdout);
        }
        pthread_mutex_unlock(&m);
    }
    return NULL;
}



int main(){
    pthread_t t[2];
    struct tinfo ti[2] = {
        TENTRY(SKB),
        TENTRY(I3STATUS)
    };
    pthread_mutex_init(&m, NULL);
    int i;
    for (i = 0; i < 2; i++){
        pthread_create(&t[i], NULL, callback, (void *) &ti[i]);
    }
    for (i = 0; i < 2; i++){
        pthread_join(t[i], NULL);
    }
    pthread_mutex_destroy(&m);
    return 0;
}