RTEMS | ftpd.c: Do not use negative socket descriptor (!173)

[Joel Sherrill (@joel)]

Joel Sherrill created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/173

Project:Branches: joel/rtems:ftpd-address-use-of-negative-socket to rtems/rtos/rtems:main
Author:   Joel Sherrill
Assignee: Joel Sherrill



## Summary

ftpd.c: Do not use negative socket descriptor

Coverity CIDs 1592926 and 1592930

The set_socket_timeout() function was called in two places which
potentially could pass in -1. Adding a check to set_socket_timeout()
was a simple solution to protect all path.

Closes #5104,


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