Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

sendto(2) OSS System Calls Reference Manual
To use this function in a 64-bit threaded application that uses the POSIX User Thread Model
library on systems running H06.24 or later RVUs or J06.13 or later RVUs, you must perform all
of the following tasks:
• Compile the application using the _PUT_MODEL_ feature test macro or equivalent
compiler command option.
• Compile the application using the -Wlp64 compiler command option.
• Link the application to the yputdll library (/G/system/zdllnnn/yputdll).
For detailed information about writing multi-threaded and 64-bit applications for the Open Sys-
tem Services environment, see the Open System Services Programmer’s Guide.
RETURN VALUES
Upon successful completion, the sendto() function returns the number of bytes sent. Otherwise,
the value -1 is returned and errno is set to indicate the error.
ERRORS
If any of the following conditions occurs, the sendto() function sets errno to the corresponding
value:
[EACCES] The socket is in the AF_UNIX domain and either search permission is denied for
a component of the pathname in the sockaddr structure, or write access to the
specified socket is denied.
[EAFNOSUPPORT]
Addresses in the specified address family cannot be used with this socket.
[EBADF] The socket parameter is not a valid file descriptor.
This error is also returned if the sendto() function is thread-aware and the socket
becomes invalid (is closed by another thread).
[ECONNRESET]
One of the following conditions occurred:
• The transport-provider process for this socket is no longer available.
• The TCP/IP subsystem for this socket is no longer available.
• The connection was forcibly closed by the peer socket.
The socket can only be closed.
[EDESTADDRREQ]
The socket is not connection-oriented and does not have its peer address set, and
no destination address was specified.
[EFAULT] A user-supplied memory buffer cannot be accessed.
[EHOSTUNREACH]
The destination host cannot be reached.
[EINTR] A signal interrupted the function before any data was transmitted.
This error is also returned if the sendto() function is thread-aware and a signal
received from the pthread_kill() function is not blocked, ignored, or handled.
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