fgets vs fgetc, strlen vs strcpsn for stripping newlines off input lines

test.c

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

int read_line_fgetc(FILE *fp, char *line, int line_size){
    int c;
    int i = 0;
    while( (c = fgetc(fp)) > 0) {
        if( (char)c == '\n' ) {
            break;
        }
        line[i] = (char)c;
        i++;
        if( i > line_size ) {
            break;
        }
    }

    line[i] = '\0';
    return i == 0 ? -1 : i;
}

int read_line_fgets_strcpsn( FILE *fp, char *line, int line_size ) {
    if( fgets(line, line_size, fp) == NULL ) {
        return -1;
    }

    line[strcspn(line, "\r\n")] = 0;

    return 1;
}

int read_line_fgets( FILE *fp, char *line, int line_size ) {
    if( fgets(line, line_size, fp) == NULL ) {
        return -1;
    }
    size_t len = strlen(line);
    if( line[len-1] == '\n' ) {
        line[len-1] = '\0';

        if( line[len-2] == '\r' ) {
            line[len-2] = '\0';
        }
    }

    return (int)len;
}

int main(int argc, char *argv[]) {
    if( argc < 2 ) {
        exit(1);
    }

    FILE *fp = fopen(argv[1], "r");

    char line[1024];
    while( read_line_fgets_strcpsn(fp, line, 1024) > 0 ) {
        puts(line);
    }
}