read_one_line.c

int readoneline(char *fname){
    static char line[256];
    FILE *fd=fopen(fname,"r");
    if (fd==NULL)
        return NULL;
    if (fgets(line,sizeof(line),fd)==NULL){
        fclose(fd);
        retrun NULL;
    }
    line[sizeof(line) - 1] = '\0';
    pos = line;
    while (*pos != '\0') {
        if (*pos == '\r' || *pos == '\n') {
            *pos = '\0';
            break;
        }
        pos++;
    }
    fclose(fd);
    return line;
}