[Bug 1956] sftp segfaults in parse_args() when argv[0] is NULL

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1956

--- Comment #5 from Iain Morgan <imorgan at nas.nasa.gov> ---
Created attachment 2209
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2209&action=edit
Check for argv[0] == NULL before strcasecmp()

I finally got some time to look at this in more detail. :-)

Checking whether argv[0] == NULL just before the strcasecmp() statement
has the advantage that the user will receive an "Invalid command"
response. That would seem to be more consistent.

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