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088b10f4c2
This commit addresses many of the style problems with the previous commit. If this introduces any bugs they are solely my fault. The style of this code needs more improvement. Some of which could be done today. Others will have to wait until `fish_indent` is improved.
94 lines
4.1 KiB
Fish
94 lines
4.1 KiB
Fish
function __fish_print_hostnames -d "Print a list of known hostnames"
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# Print all hosts from /etc/hosts. Use 'getent hosts' on OSes that support it
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# (OpenBSD and Cygwin do not).
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#
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# Test if 'getent hosts' works and redirect output so errors don't print.
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if type -q getent
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and getent hosts >/dev/null 2>&1
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# Ignore zero IPs.
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getent hosts | string match -r -v '^0.0.0.0' | string replace -r '^\s*\S+\s+' '' | string split ' '
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else if test -r /etc/hosts
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# Ignore commented lines and functionally empty lines.
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string match -r -v '^\s*0.0.0.0|^\s*#|^\s*$' </etc/hosts | string replace -r -a '#.*$' '' | string replace -r '^\s*\S+\s+' '' | string trim | string replace -r -a '\s+' ' ' | string split ' '
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end
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# Print nfs servers from /etc/fstab
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if test -r /etc/fstab
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string match -r '^\s*[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3]:|^[a-zA-Z\.]*:' </etc/fstab | string replace -r ':.*' ''
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end
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# Check hosts known to ssh
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set -l known_hosts ~/.ssh/known_hosts{,2} /etc/ssh/known_hosts{,2} # Yes, seriously - the default specifies both with and without "2"
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# Check default ssh configs
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set -l ssh_config
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# Get alias and commandline options
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set -l ssh_command (functions ssh | string split ' ') (commandline -cpo)
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# Extract ssh config path from last -F short option
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if contains -- '-F' $ssh_command
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set -l ssh_config_path_is_next 1
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for token in $ssh_command
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if contains -- '-F' $token
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set ssh_config_path_is_next 0
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else if test $ssh_config_path_is_next -eq 0
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set ssh_config (eval "echo $token")
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set ssh_config_path_is_next 1
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end
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end
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else
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set ssh_config $ssh_config ~/.ssh/config
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end
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# Extract ssh config paths from Include option
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function _ssh_include --argument-names ssh_config
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# Relative paths in Include directive use /etc/ssh or ~/.ssh depending on
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# system or user level config. -F will not override this behaviour
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if test $ssh_config = '/etc/ssh/ssh_config'
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set relative_path '/etc/ssh'
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else
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set relative_path $HOME/.ssh
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end
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function _recursive --no-scope-shadowing
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set paths
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for config in $argv
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set paths $paths (cat $config ^/dev/null \
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# Keep only Include lines
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| string match -r -i '^\s*Include\s+.+' \
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# Remove Include syntax
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| string replace -r -i '^\s*Include\s+' '' \
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# Normalize whitespace
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| string trim | string replace -r -a '\s+' ' ')
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end
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if test -n "$paths"
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# Expand paths which may have globbing and tokenize
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set paths (eval "echo $paths" | string split ' ')
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for path_index in (seq (count $paths))
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# Resolve relative paths
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if string match -v '/*' $paths[$path_index] >/dev/null
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set paths[$path_index] $relative_path/$paths[$path_index]
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end
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echo $paths[$path_index]
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end
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_recursive $paths
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end
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end
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_recursive $ssh_config
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end
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set -l ssh_configs (_ssh_include /etc/ssh/ssh_config) (_ssh_include $ssh_config)
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for file in $ssh_configs
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if test -r $file
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# Print hosts from system wide ssh configuration file
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string match -r -i '^\s*Host\s+\S+' <$file | string replace -r -i '^\s*Host\s+' '' | string trim | string replace -r '\s+' ' ' | string split ' ' | string match -v '*\**'
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# Extract known_host paths.
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set known_hosts $known_hosts (string match -ri '^\s*UserKnownHostsFile|^\s*GlobalKnownHostsFile' <$file | string replace -ri '.*KnownHostsFile\s*' '')
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end
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end
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for file in $known_hosts
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# Ignore hosts that are hashed, commented or have custom ports (like [localhost]:2200)
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test -r $file
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and string replace -ra '(\S+) .*' '$1' <$file | string match -r '^[^#|[=]+$' | string split ","
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end
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return 0
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end
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