patch to suppress sigpipe

[fz-lyu]

patch to suppress sigpipe

https://github.com/Azure/azure-iot-sdk-c/issues/1423

[fz-lyu]

for patch#11 discussed in the last meeting

cc @suhuruli @momuno

[ewertons]

This change is good to go, with it just SIGPIPE is suppressed. Source: https://www.man7.org/linux/man-pages/man2/send.2.html

Since we have a function in the tlsio for suppressing SIGPIPE, this commit wouldn't change the current expected behavior.

[ewertons]

/azp run all

[azure-pipelines[bot]]

No pipelines are associated with this pull request.

[ewertons]

/azp run integrate-into-repo-C-shared-utility

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[ewertons]

@fanzhe98 , this change fails to build on OS-X (it uses the same socket adapter). For addressing that, one way is to add a define at the top of socketio_berkeley.c:

// MSG_NOSIGNAL is not defined on all platforms where socketio_berkeley.c is used (e.g., OS-X).
// Setting MSG_NOSIGNAL to 0 results in not suppressing SIGPIPE.
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0 
#endif

If you do need to have the signal suppressed on OS-X as well, this would be a recourse to be added: https://stackoverflow.com/questions/19509348/sigpipe-osx-and-disconnected-sockets

[fz-lyu]

@ewertons we do not support development on Os-X yet.

I will go ahead and add the lines of ifdef later today

[fz-lyu]

/azp run integrate-into-repo-C-shared-utility

[azure-pipelines[bot]]

Commenter does not have sufficient privileges for PR 479 in repo Azure/azure-c-shared-utility

[fz-lyu]

code updated @ewertons

[momuno]

/azp run integrate-into-repo-C-shared-utility

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[momuno]

/azp run integrate-into-repo-C-shared-utility

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[momuno]

/azp run integrate-into-repo-C-shared-utility

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).