cider/io.c

#define _GNU_SOURCE 1 // Needed for getline to avoid implicit function declaration, see `man 3 getline`
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include "io.h"
#include "parse.h"

void getline_wrapper(struct arguments *args) {
    size_t bufsize = 0;
    char *line = NULL;
    errno = 0;
    int getline_retval = getline(&line, &bufsize, args->ist);
    if(line == NULL || line == 0 || feof(args->ist) || errno != 0 || getline_retval < 0) {
        if(errno != 0) {
            printf("Error %d (%s) getting line for reading.\n", errno, strerror(errno));
        }
        free(line);
        return;
    }

    char start[256]; // Make it big enough for ipv6
    strncpy(start, line, 256);
    char *end = NULL;
    int ret;
    if((ret = split_range(start, &end)) != 0) {
        fprintf(stderr, "Error when attempting to split range %s into start and end parts.\n", line);
        exit(1);
    }

    in_addr_t lower;
    if((lower = inet_network(start)) == -1) {
        fprintf(stderr, "Lower address invalid\n");
        exit(1);
    }
    in_addr_t upper;
    if((upper = inet_network(end)) == -1) {
        fprintf(stderr, "Upper address invalid\n");
        exit(1);
    }
    if(upper < lower) {
        fprintf(stderr, "Incorrect order in range specification? (%s > %s)\n", start, end);
        exit(1);
    }
    deaggregate(lower, upper);
    free(line);
}

void no_read(struct arguments *args) {
    printf("Unknown mode. Not reading any lines.\n");
}

void sigint_handler(int sig) {
    break_print_loop = true;
}