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projects:openssh [2019/12/25 16:33] admin [scp run on client (copy remote to local case)] |
projects:openssh [2019/12/25 16:34] admin [1) scp run on client (copy remote to local case)] |
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====== scp ====== | ====== scp ====== | ||
- | ===== Control flow ===== | + | |
- | ==== 1.scp run on client (copy remote to local case) ==== | + | ==== 1) scp run on client (copy remote to local case) ==== |
* construct ''scp'' command to be executed on the server via ssh. append ''-v -r -p -d'' flags as appropriate. Resulting command stored in ''cmd'' variable | * construct ''scp'' command to be executed on the server via ssh. append ''-v -r -p -d'' flags as appropriate. Resulting command stored in ''cmd'' variable | ||
* call ''toremote()'' if destination is remote; ''tolocal()'' if destination is local (handles 'remote to local' and 'local to local' cases) | * call ''toremote()'' if destination is remote; ''tolocal()'' if destination is local (handles 'remote to local' and 'local to local' cases) | ||
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* ''tolocal()->sink()'' receives file from child via ''remin'' & ''remout'' and stores it to the local destination | * ''tolocal()->sink()'' receives file from child via ''remin'' & ''remout'' and stores it to the local destination | ||
* finaly wait for child to finish, check for errors, close ''remin'' & ''remout'' and exit | * finaly wait for child to finish, check for errors, close ''remin'' & ''remout'' and exit | ||
- | ==== On server ==== | + | ==== 2) client runs ssh to spawn server side of scp ==== |
+ | ==== 3) server accepts ssh connection from client ==== | ||
* for ''-t'' or ''-f'' private flags: ''remin = stdin''; ''remout = stdout'' | * for ''-t'' or ''-f'' private flags: ''remin = stdin''; ''remout = stdout'' |