03-26-2006
password check
Hi
While using Pipe concept ,if a user enters a "login name" and "paswword"
,then how does a child process check for user password is correct or not and give notification to parent process.
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pwck(1M) pwck(1M)
NAME
pwck, grpck - password/group file checkers
SYNOPSIS
[password [shadow]]
[password]
[file]
DESCRIPTION
scans fields in the password and shadow files and reports any inconsistencies to standard error. The checks include validation of the num-
ber of fields, login name, user ID, group ID, and whether the login directory and optional program exist. In addition, if the root entry
shows a program, it can only be one of: or The default password file is The default shadow file is For additional verification, use to
check consistency between entries in the password and shadow files.
verifies all entries in the group file and reports any inconsistencies to standard error. This verification includes a check of the number
of fields, group name, group ID, and whether all login names appear in the password file. The default group file is
Options
recognizes the following options:
Check inconsistencies with the Protected Password database.
It calls
Check encrypted password lengths that are greater than 8 characters.
DIAGNOSTICS
Group entries in with no login names are flagged.
WARNINGS
Successful password file validation is not sufficient for proper system operation. To help maintain consistency with other system data-
bases, editing of the password file with is discouraged. HP recommends that you use or to edit
HP-UX 11i Version 3 is the last release to support trusted systems functionality.
DEPENDENCIES
NFS
and check only the local password, shadow and group files. The Network Information Service database is not checked.
AUTHOR
was developed by AT&T and HP.
FILES
SEE ALSO
authck(1M), pwconv(1M), vipw(1M), group(4), passwd(4), shadow(4).
STANDARDS CONFORMANCE
pwck(1M)