/*** nRet = WriteLen(nFd, vPtrMsg, nExpectLen, &nPtrWriteLen); ***/
int WriteLen(int nFd, void *vPtrMsg, size_t nExpectLen, int *nPtrWriteLen)
{
int nRemainLen = 0;
int nWriteOneLen = 0;
int nWriteTotalLen = 0;
unsigned char *ptr = NULL;
/* init_value */
nRemainLen = nExpectLen;
nWriteTotalLen = 0;
ptr = vPtrMsg;
while (nRemainLen > 0) {
nWriteOneLen = write(nFd, ptr, nRemainLen);
if ( nWriteOneLen <= 0) {
if (errno == EINTR) { /* Interrupted system call */
errno = 0;
continue; /* and call write() again */
}
else if ( (errno == EWOULDBLOCK) || (errno == EAGAIN) ) { /* Operation would block */
*nPtrWriteLen = nWriteTotalLen;
return (-2);
}
else {
fprintf(stderr, "Writen() error : nFd[%d] errno[%d][%s]", nFd, strerror(errno));
*nPtrWriteLen = nWriteTotalLen;
return (-1); /* error */
}
}
nWriteTotalLen += nWriteOneLen;
nRemainLen -= nWriteOneLen;
ptr += nWriteOneLen;
}
*nPtrWriteLen = nWriteTotalLen;
return nWriteTotalLen;
}
