HP-UX Reference (11i v2 03/08) - 4 File Formats (vol 8)

n
nsswitch.conf(4) nsswitch.conf(4)
WARNINGS
Within each process that uses nsswitch.conf()
, the entire file is read only once. If the file is later
changed, the process will continue using the old configuration.
Programs that use the
getXXbyYY() functions cannot be linked statically since the implementation of
these functions requires dynamic linker functionality to access the shared objects
/usr/lib/nss_SSS.sl.1
at run time.
The use of both
nis and nisplus as sources for the same database is strongly discouraged since both
the name-services are expected to store similar information and the lookups on the database may yield
different results depending on which name-service is operational at the time of the request.
Misspelled names of sources and databases will be treated as legitimate names of (most likely nonex-
istent) sources and databases.
The following functions do not use the switch:
fgetgrent(), fgetpwent(), fgetspent(),
getpw(), and putpwent().
The functions
getipnodebyname()
and getipnodebyaddr()
were introduced with libc.2
and
not found in
libc.1.
Applications linked with
libc.1 will display different default actions for
NOTFOUND and TRYAGAIN.
Applications linked with
libc.1 will have the switch search terminate if the Name Service returns a
result of NOTFOUND or TRYAGAIN.
This will be an issue for existing
nsswitch.conf
files that specify name service lookup criteria that
contains no criterion between source entries.
Example:
hosts: dns files
For applications linked with libc.1, the fallback to files will only occur if
DNS returns UNAVAIL.For
all other applications, the fallback to files will occur unless
DNS returns SUCCESS.
For applications linked with
libc.1 and other applications to have the same behavior, a criterion must
be specified between source .
For
libc.1 behavior:
hosts: dns [NOTFOUND=return TRYAGAIN=return] files
For the default system behavior:
hosts: dns [NOTFOUND=continue TRYAGAIN=continue] files
AUTHOR
nsswitch.conf was developed by Sun Microsystems, Inc.
FILES
A source named SSS is implemented by a shared object named
nss_SSS.1 that resides in /usr/lib.
/etc/nsswitch.conf configuration file
/usr/lib/nss_compat.1 implements "compat" source
/usr/lib/nss_dns.1 implements "dns" source
/usr/lib/nss_files.1 implements "files" source
/usr/lib/nss_nis.1 implements "nis" source
/usr/lib/nss_nisplus.1 implements "nisplus" source
/usr/lib/nss_ldap.1 implements "ldap" source
/etc/netconfig configuration file for netdir() functions that redirects
hosts/services policy to the switch
/etc/nsswitch.files sample configuration file that uses "files" only
/etc/nsswitch.nis sample configuration file that uses "files" and "nis"
/etc/nsswitch.nisplus sample configuration file that uses "files" and "nisplus"
/etc/nsswitch.ldap sample configuration file that uses "files" and "ldap"
SEE ALSO
nis+(1), automount(1M), rpc.nisd(1M), sendmail(1M), getgrent(3C), getpwent(3C), gethostent(3N),
getnetent(3N), getnetgrent(3C), getprotoent(3N), getpublickey(3N), getrpcent(3C), getservent(3N),
netdir(3N), secure_rpc(3N), netconfig(4), resolver(4), ypfiles(4). ldapux(5) and pam_authz(5) in the
LDAP-UX Integration product.
Section 4−−222 Hewlett-Packard Company − 4 − HP-UX 11i Version 2: August 2003