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NAME
getent - get entries from Name Service Switch libraries
SYNOPSIS
getent [option]... database key...
DESCRIPTION
The getent command displays entries from databases supported by the Name Service Switch
libraries, which are configured in /etc/nsswitch.conf. If one or more key arguments are
provided, then only the entries that match the supplied keys will be displayed.
Otherwise, if no key is provided, all entries will be displayed (unless the database does
not support enumeration).
The database may be any of those supported by the GNU C Library, listed below:
ahosts When no key is provided, use sethostent(3), gethostent(3), and endhostent(3) to
enumerate the hosts database. This is identical to using hosts(5). When one or
more key arguments are provided, pass each key in succession to getaddrinfo(3) with
the address family AF_UNSPEC, enumerating each socket address structure returned.
ahostsv4
Same as ahosts, but use the address family AF_INET.
ahostsv6
Same as ahosts, but use the address family AF_INET6. The call to getaddrinfo(3) in
this case includes the AI_V4MAPPED flag.
aliases
When no key is provided, use setaliasent(3), getaliasent(3), and endaliasent(3) to
enumerate the aliases database. When one or more key arguments are provided, pass
each key in succession to getaliasbyname(3) and display the result.
ethers When one or more key arguments are provided, pass each key in succession to
ether_aton(3) and ether_hostton(3) until a result is obtained, and display the
result. Enumeration is not supported on ethers, so a key must be provided.
group When no key is provided, use setgrent(3), getgrent(3), and endgrent(3) to enumerate
the group database. When one or more key arguments are provided, pass each numeric
key to getgrgid(3) and each nonnumeric key to getgrnam(3) and display the result.
gshadow
When no key is provided, use setsgent(3), getsgent(3), and endsgent(3) to enumerate
the gshadow database. When one or more key arguments are provided, pass each key
in succession to getsgnam(3) and display the result.
hosts When no key is provided, use sethostent(3), gethostent(3), and endhostent(3) to
enumerate the hosts database. When one or more key arguments are provided, pass
each key to gethostbyaddr(3) or gethostbyname2(3), depending on whether a call to
inet_pton(3) indicates that the key is an IPv6 or IPv4 address or not, and display
the result.
initgroups
When one or more key arguments are provided, pass each key in succession to
getgrouplist(3) and display the result. Enumeration is not supported on
initgroups, so a key must be provided.
netgroup
When one key is provided, pass the key to setnetgrent(3) and, using getnetgrent(3)
display the resulting string triple (hostname, username, domainname).
Alternatively, three keys may be provided, which are interpreted as the hostname,
username, and domainname to match to a netgroup name via innetgr(3). Enumeration
is not supported on netgroup, so either one or three keys must be provided.
networks
When no key is provided, use setnetent(3), getnetent(3), and endnetent(3) to
enumerate the networks database. When one or more key arguments are provided, pass
each numeric key to getnetbyaddr(3) and each nonnumeric key to getnetbyname(3) and
display the result.
passwd When no key is provided, use setpwent(3), getpwent(3), and endpwent(3) to enumerate
the passwd database. When one or more key arguments are provided, pass each
numeric key to getpwuid(3) and each nonnumeric key to getpwnam(3) and display the
result.
protocols
When no key is provided, use setprotoent(3), getprotoent(3), and endprotoent(3) to
enumerate the protocols database. When one or more key arguments are provided,
pass each numeric key to getprotobynumber(3) and each nonnumeric key to
getprotobyname(3) and display the result.
rpc When no key is provided, use setrpcent(3), getrpcent(3), and endrpcent(3) to
enumerate the rpc database. When one or more key arguments are provided, pass each
numeric key to getrpcbynumber(3) and each nonnumeric key to getrpcbyname(3) and
display the result.
services
When no key is provided, use setservent(3), getservent(3), and endservent(3) to
enumerate the services database. When one or more key arguments are provided, pass
each numeric key to getservbynumber(3) and each nonnumeric key to getservbyname(3)
and display the result.
shadow When no key is provided, use setspent(3), getspent(3), and endspent(3) to enumerate
the shadow database. When one or more key arguments are provided, pass each key in
succession to getspnam(3) and display the result.
OPTIONS
--service service
-s service
Override all databases with the specified service. (Since glibc 2.2.5.)
--service database:service
-s database:service
Override only specified databases with the specified service. The option may be
used multiple times, but only the last service for each database will be used.
(Since glibc 2.4.)
--no-idn
-i Disables IDN encoding in lookups for ahosts/getaddrinfo(3) (Since glibc-2.13.)
--help
-? Print a usage summary and exit.
--usage
Print a short usage summary and exit.
--version
-V Print the version number, license, and disclaimer of warranty for getent.
EXIT STATUS
One of the following exit values can be returned by getent:
0 Command completed successfully.
1 Missing arguments, or database unknown.
2 One or more supplied key could not be found in the database.
3 Enumeration not supported on this database.
SEE ALSO
nsswitch.conf(5)