Ezri Brimhall
6d9b5c4f8a
Now uses an AWK one-liner, improving performance due to making fewer calls to getent. This might be have been anissue with certain remote-user passwd backends that do not cache a list of users. Additionally, added fallback to simply scan /etc/passwd if getent is not available on the system.
27 lines
1.2 KiB
Bash
Executable File
27 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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# Returns a list of all users on the system with UID >= 1000 and their home directory and shell
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# Sorted lexicographically by username
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# Uses getent passwd so as to include remote users (e.g. LDAP) in the list
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# getent passwd returns a list of all users on the system, local and remote
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# it may return duplicates, since a user might be listed identically in multiple nsswitch databases (e.g. files and systemd)
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# as such, we sort the list and remove duplicates with uniq before processing it
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# I'm also removing the "nobody" user, since it's a special case and not a real user
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# passwd entries have the following format:
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# $username:x:$uid:$gid:$displayname:$home:$shell
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# e.g. root:x:0:0::/root:/bin/bash
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# Awk is 1-indexed, so $1 is the username, $2 is the x, $3 is the uid, etc.
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# the fields we care about are:
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# $1: username
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# $3: uid
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# $7: shell
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if which getent &>/dev/null; then
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getent passwd | sort | uniq | awk -F: '{if ($3 >= 1000 && $1 != "nobody") print "User: " $1 ", UID: " $3 ", Shell: " $7}'
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else
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echo "getent not found, falling back to /etc/passwd" >&2
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awk -F: '{if ($3 >= 1000 && $1 != "nobody") print "User: " $1 ", UID: " $3 ", Shell: " $7}' /etc/passwd
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fi
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