z/OS Communications Server: IP Sockets Application Programming Interface Guide and Reference
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Parameter values returned to the application

z/OS Communications Server: IP Sockets Application Programming Interface Guide and Reference
SC27-3660-00

ERRNO
A fullword binary field. If RETCODE is negative, this contains an error number. See Socket call error return codes for information about ERRNO return codes.
RETCODE
A fullword binary field with the following values:
Value
Description
<0
Call returned error. See ERRNO field.
0
Connection partner has closed connection.
>0
Number of bytes read.
Parent topic: RECVMSG

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