Function write_n

cpp-subprocess/subprocess.hpp:643–653

! * Function: write_n * Writes `length` bytes to the file descriptor `fd` * from the buffer `buf`. * Parameters: * [in] fd : The file descriptotr to write to. * [in] buf: Buffer from which data needs to be written to fd. * [in] length: The number of bytes that needs to be written from * `buf` to `fd`. * [out] int : Number of bytes written or -1 in case of fa

   * [out] int : Number of bytes written or -1 in case of failure.
   */
  static inline
  int write_n(int fd, const char* buf, size_t length)
  {
    size_t nwritten = 0;
    while (nwritten < length) {
      int written = subprocess_write(fd, buf + nwritten, length - nwritten);
      if (written == -1) return -1;
      nwritten += written;
    }
    return nwritten;
  }


  /*!