When dgsh_negotiate fails it should set errno as follows.
[x] ECONNRESET when the negotiation fails remotely.
[x] ENOTSOCK when the number of specified channels is greater than one and there is no dgsh client on the corresponding side.
[x] Other errors according to failed functions. (No need to modify code here, other than to ensure that no library calls until the return clobber errno.
[x] When dgsh_negotiate fails, clients must exit with an error code. Clients must exit silently on ECONNRESET and report the error in all other error cases.
[x] The documentation (return value and example) must be updated to reflect these changes.
When
dgsh_negotiatefails it should seterrnoas follows.ECONNRESETwhen the negotiation fails remotely.ENOTSOCKwhen the number of specified channels is greater than one and there is no dgsh client on the corresponding side.returnclobbererrno.dgsh_negotiatefails, clients must exit with an error code. Clients must exit silently onECONNRESETand report the error in all other error cases.