file to stderr and syslog.
* src/newusers.c: In case of error when files are open or closed,
indicate the failing file.
* src/newusers.c: Do not try to unlock the files manually since
this is done in fail_exit.
locked. Report failures to unlock to stderr and syslog.
* src/chfn.c: Is case of failure, use fail_exit() rather than
exit().
* src/chfn.c: Ignore the return value of pam_end().
lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
Added *_dbname() functions to retrieve the name of the databases.
* lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,
lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
*_name() functions renamed *setname().
* src/grpck.c, src/pwck.c: Likewise.
* lib/groupio.h, lib/pwio.h, lib/sgroupio.h, lib/shadowio.h: Added
the name of the arguments to the prototypes.
* src/chage, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupdel.c,
src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
src/newusers.c, src/passwd.c, src/pwck.c, src/pwconv.c,
src/pwunconv.c, src/useradd.c, src/userdel.c, src/usermod.c:
Harmonize the erro & syslog messages in case of failure of the
*_lock(), *_open(), *_close(), *_unlock(), *_remove() functions.
* src/chgpasswd.c, src/chpasswd.c, src/usermod.c: Avoid
capitalized messages.
* src/chpasswd.c, src/useradd.c, src/usermod.c: Harmonize messages
in case of inexistent entries.
* src/usermod.c: Harmonize messages in case of already existing
entries.
* src/newusers.c, src/useradd.c: Simplify PAM error handling.
* src/useradd.c: Report failures to unlock files (stderr, syslog,
and audit). But do not fail (continue).
* src/useradd.c (open_files): Do not report to syslog & audit
failures to lock or open the databases. This might be harmless,
and the logs were not already informed that a change was
requested.
* src/usermod.c: It's not the account which is unlocked, but its
password.
group or gshadow files were previously locked.
* src/groupadd.c: Make sure failures are reported to syslog/audit
after the change is mentioned.
* src/groupmod.c: Add logging to syslog & audit on lock/unlock
failures.
* src/groupmod.c: Make sure issues are reported to syslog or audit
after the change is mentioned.
* src/groupdel.c: Only call gr_unlock() and sgr_unlock() in the
group or gshadow files were previously locked.
* src/groupdel.c: Simplify the handling of PAM errors.
src/groupmod.c, src/grpck.c, src/login.c, src/logoutd.c,
src/newgrp.c, src/newusers.c, src/passwd.c, src/pwck.c,
src/suauth.c, src/useradd.c, src/userdel.c, src/usermod.c,
src/vipw.c: Complete the switch from the `' quotation style to ''.
Do it also in SYSLOG messages. Quote some parameters. All this
permits to merge some messages.
* src/groupmems.c: Added Prog global variable to indicate the name
of the program in error messages.
2008-07-22 Lukáš Kuklínek <lkukline@redhat.com>
* NEWS, src/groupmems.c: Check if the user added to group actually
exist. RedHat bug #455603
* NEWS, src/groupmems.c: Check if the group exists in the group
local database (/etc/group). RedHat bug #456088
effects. This avoid checking if the user exists in the local passwd
file if not necessary, and thus allow to add LDAP users to local
groups. (The user is already checked against the system
configuration with getpwnam()). Thanks to Dan Kopecek.
update_faillog(). Report errors (but don't fail) if the file
exist, but open(), lseek(), read(), write(), or close() fails.
* src/usermod.c: Add brackets and parenthesis.
* src/usermod.c: Ignore the return value of pam_end() before
exiting.
* src/usermod.c: Ignore the return value of strftime(),
snprintf(), and puts().
* src/usermod.c: Check the return value of gmtime() and asctime(),
and output the raw time_t on failures.
* src/lastlog.c: umin and umax do not need to be signed long. Use
an unsigned long which might be needed to parse a GID or UID. Add
the has_umin and has_umax to replace the -1 values.
* src/lastlog.c: Cast dates to time_t.
* src/lastlog.c: Prefix lastlog errors with "lastlog: ".
* src/login.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/login.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
prototypes.
* src/chage.c: The ID argument of audit_logger is an unsigned
int. Use AUDIT_NO_ID instead of -1.
* src/chage.c: print_date() received a time_t.
* src/chage.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spwent.sp_flag.
unsigned long integers.
* src/pwck.c: Cast number of days to a long integer.
* src/pwck.c: Use the SCALE macro instead of (24L * 3600L)
for the values to be set in /etc/shadow.
* src/pwck.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
int. Use AUDIT_NO_ID instead of -1.
* src/groupmod.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/groupmod.c: Cast the parsed GID/UID to a gid_t/uid_t.
int. Use AUDIT_NO_ID instead of -1.
* src/useradd.c: Cast the parsed GID/UID to a gid_t/uid_t.
* src/useradd.c: The size argument of fgets is an int, not a
size_t.
* src/useradd.c: Cast number of days to a long integer.
* src/useradd.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
* src/useradd.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/newusers.c: Comment why we use both getgrgid() and
gr_locate_gid().
* src/newusers.c: Cast the parsed GID/UID to a gid_t/uid_t.
* src/newusers.c: Cast the number of days to a long integer.
* src/newusers.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
* src/newusers.c: The size argument of fgets is an int, not a
size_t.
long integer.
* src/usermod.c: Cast UIDs and GIDs to uid_t and gid_t after
checking the ranges.
* src/usermod.c: The ID argument of audit_logger is an unsigned
int.
* src/usermod.c: read() returns a ssize_t.
* src/usermod.c: Cast the return value of malloc and make sure it
receives a size_t.
int.
* src/gpasswd.c: Ignore the return value of signal(). The signal
handlers are only changed for the last steps of gpasswd, and there
is no need to restore them.
unsigned long integers.
* src/newgrp.c: The ID argument of audit_logger is an unsigned
int.
* src/newgrp.c: Ignore the return value of signal() (the signal
handlers are assumed to be the default one and are restored
later).
* src/newgrp.c: Do not checl if a pid_t is < 0, check if equal
to (pid_t)-1.
libmisc/loginprompt.c, libmisc/ttytype.c, libmisc/tz.c,
src/login_nopam.c, src/chpasswd.c, src/chgpasswd.c, lib/port.c:
The size argument of fgets is an int, not a size_t.
* libmisc/loginprompt.c: Ignore the return value from signal()
when the signal handlers are restored.
* src/chpasswd.c: Cast the return value of time() to a long
integer.
* src/chpasswd.c: Use the SCALE macro instead of (24L * 3600L)
for the values to be set in /etc/shadow.
* src/su.c: Add brackets and parenthesis.
* src/su.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/su.c: Ignore the return value of pam_end() before
exiting.
* src/su.c: Avoid assignments in comparisons.
* src/su.c: Avoid multi-statements lines.
and printf().
* src/id.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/id.c: Add brackets and parenthesis.
* src/id.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/chsh.c: restricted_shell() renamed is_restricted_shell().
check_shell() renamed shell_is_listed().
* src/chsh.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/chsh.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/chsh.c: Ignore the return value of pam_end() before
exiting.
integers.
* src/grpunconv.c: Add brackets and parenthesis.
* src/grpunconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpunconv.c: Avoid implicit conversion of pointers / integers
to booleans.
bindtextdomain(), and textdomain().
* src/sulogin.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/sulogin.c: Avoid assignments in comparisons.
* src/sulogin.c: Ignore the return value of alarm().
* src/groups.c: Add brackets and parenthesis.
* src/groups.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/groups.c: Avoid assignments in comparisons.
* src/groups.c: Ignore the return value of putchar(), printf()
* src/groups.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpconv.c: Add brackets and parenthesis.
* src/grpconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpconv.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/faillog.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/faillog.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/faillog.c: Add brackets and parenthesis.
* src/login.c: Ignore the return value of pam_end() before
exiting.
* src/login.c: Use a bool when possible instead of int integers.
* src/login.c: Add brackets and parenthesis.
* src/login.c: Ignore the return values of fflush(), putchar(), puts().
* src/login.c: Ignore the return value of fclose() for read-only
files.
* src/login.c: Avoid assignments in comparisons.
* src/login.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
integers.
* src/groupadd.c: Add brackets and parenthesis.
* src/groupadd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/groupadd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupadd.c: Ignore the return value of pam_end() before
exiting.
* src/passwd.c: Avoid assignments in comparisons.
* src/passwd.c: Add brackets and parenthesis.
* src/passwd.c: Avoid implicit conversion of pointers / integers /
chars to booleans.
* src/passwd.c: Move the "context_t c" declaration at the
beginning check_selinux_access.
* src/passwd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
integers.
* src/groupmod.c: Avoid assignments in comparisons.
* src/groupmod.c: Add brackets and parenthesis.
* src/groupmod.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/groupmod.c: Use a %lu format to print GIDs, and cast the GID
to (unsigned long int).
* src/groupmod.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupmod.c: Ignore the return value of pam_end() before
exiting.
* src/useradd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/useradd.c: Add brackets and parenthesis.
* src/useradd.c: Avoid assignments in comparisons.
* src/useradd.c: Ignore the return value of fclose() for read-only
files.
* src/useradd.c: Ignore the return value of fflush() before
closing the files.
* src/useradd.c: Avoid multi-statements lines.
* src/useradd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/useradd.c: Ignore the return value of pam_end() before
exiting.
* src/vipw.c: Ignore the return value of umask(), when the mask is
set again to the old value.
* src/vipw.c: Avoid implicit conversion of pointers / integers to
booleans.
* src/vipw.c: Add brackets and parenthesis.
* src/vipw.c: Avoid assignments in comparisons.
* src/vipw.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/vipw.c: Add missing termination of the longopts parameter
for getopt_long().
integers.
* src/chgpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/chgpasswd.c: Avoid implicit conversion of integers to
booleans.
integers.
* src/groupdel.c: Avoid implicit conversion of pointers / integers to
booleans.
* src/groupdel.c: Avoid assignments in comparisons.
* src/groupdel.c: Ignore the return value of pam_end() before
exiting.
* src/groupdel.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
bindtextdomain(), and textdomain().
* src/expiry.c: Add brackets and parenthesis.
* src/expiry.c: Avoid assignments in comparisons.
* src/expiry.c: Avoid implicit conversion of pointers to booleans.
* src/usermod.c: Add brackets and parenthesis.
* src/usermod.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/usermod.c: Avoid assignments in comparisons.
* src/usermod.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/usermod.c: Ignore the return value of pam_end() before
exiting.
long_options before the blocks of code.
* src/groupmems.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupmems.c: Ignore the return value of pam_end() before
exiting.
* src/chfn.c: Avoid implicit conversion of integers / chars to
booleans.
* src/chfn.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/logoutd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/logoutd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/logoutd.c: Add brackets and parenthesis.
integers.
* src/chpasswd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/chpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/pwconv.c: Add brackets and parenthesis.
* src/pwconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/pwconv.c: Avoid implicit conversion of pointers / integers /
chars to booleans.
* src/newusers.c: Use a bool when possible instead of int
integers.
* src/newusers.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/newusers.c: Ignore the return value of pam_end() before
exiting.
* src/newusers.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/newusers.c: Avoid multi-statements lines.
* src/newusers.c: Add brackets and parenthesis.
* src/gpasswd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/gpasswd.c: Ignore the return value of putchar() and fflush()
before exiting.
* src/gpasswd.c: check_list() renamed is_valid_user_list(), and
return a bool.
* src/gpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/lastlog.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/lastlog.c: Add brackets and parenthesis.
* src/lastlog.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
deleted_user_group, was_member, was_admin, and the
options' flags.
* src/userdel.c: Change path_prefix() prototype to return a bool.
* src/userdel.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/userdel.c: Ignore the return value from pam_end() since we
are exiting anyway just afterwards.
* src/userdel.c: Avoid implicit conversion of pointers /
integers / chars to booleans.
* src/userdel.c: Add brackets and parenthesis.
* src/userdel.c: Avoid assignments in comparisons.
* src/userdel.c: Do not ignore the return value of the *_unlock()
functions.
booleans true and false instead. Change the prototypes of
list_match(), user_match(), from_match(), and string_match()
accordingly. Also use booleans internally.
* src/login_nopam.c: Add brackets and parenthesis.
* src/login_nopam.c: Avoid implicit conversion of pointers /
integers / chars to booleans.
* src/login_nopam.c: Avoid assignments in comparisons.
check_user_name) renamed to is_valid_user_name (resp.
is_valid_group_name). is_valid_user_name and is_valid_group_name
return a bool.
* src/grpck.c, src/newusers.c, src/usermod.c, src/useradd.c,
src/groupmod.c, src/pwck.c, src/groupadd.c: Use is_valid_user_name
and is_valid_group_name, following above change.
* libmisc/chkname.c: Avoid implicit conversion of chars to
booleans. Add brackets and parenthesis.
followed by rmdir to remove the directory itself, delete also the
root directory in remove_tree.
* src/userdel.c, src/usermod.c: Do not call rmdir after
remove_tree.
* libmisc/audit_help.c: Include prototypes.h to get the prototype
of audit_help_open.
* libmisc/salt.c: Use booleans instead of negating integers.
* src/passwd.c: Declare the check_selinux_access prototype and
avoid name clashes (change_user -> changed_user; change_uid ->
changed_uid; access -> requested_access)
SIGSTOP handling. Raise the signal which stopped the child instead
of always SIGSTOP.
Import Debian patch 406_vipw_resume_properly.
Thanks to Dean Gaudet.
* NEWS, src/vipw.c: Resume properly after ^Z.
Files with no license use the default 3-clauses BSD license. The copyright
were mostly not recorded; they were updated according to the Changelog.
"Julianne Frances Haugh and contributors" changed to "copyright holders
and contributors".
endpwend() sequences (ditto for getgrent(), getspent(), and
getsgent()). The only real (minor) issue was in login, which kept
the passwd file open.
* libmisc/entry.c: Remove unneeded setspent() and endspent() (only
getspnam is called in the middle).
* libmisc/find_new_ids.c: Make sure to close the password and
group files with endpwent() and endgrent().
* libmisc/pwdcheck.c: Remove unneeded endspent() (only getspnam()
is called before).
* src/lastlog.c, src/passwd.c, src/groupmod.c, src/faillog.c,
src/groups.c: Make sure to close
the password file with endpwent().
* src/login.c: Remove unneeded setpwent() (only xgetpwnam is
called before).
* src/login.c, src/newgrp.c: Fix typos in comments.
files are unlocked on exit. Unlock locked files in fail_exit().
Prefer fail_exit() over exit().
* NEWS, src/groupmod.c: When the GID of a group is changed, update
also the GID of the passwd entries of the users whose primary
group is the group being modified.
unlocked on exit. Add function fail_exit(). Use fail_exit()
instead of exit().
* src/groupdel.c: Fail immediately instead of increasing errors.
Better handling of error cases, like locked group or gshadow file.
to Christian Henz (http://bugs.debian.org/467488)
* src/gpasswd.c (get_group): Do not fail if gshadow is not present. Just use
the group file and set the grent structure
* src/gpasswd.c (check_perms): The permissions should be checked
using both the gshadow and group file. Add a <struct group *>
parameter, and check if the gshadow file exists (is_shadowgrp).
* src/gpasswd.c (main): Do not use sgent.sg_mem or sgent.sg_adm if
the gshadow file is not present (sgent is not initialized in that
case). The fields of sgent can be set, but not used.
* src/newusers.c: The user's ID must be found before the group ID
to mimic useradd's behavior choices of UID and GID.
* src/newusers.c: Reuse the generic find_new_uid() and
find_new_gid() functions. This permits to respect the
UID_MIN/UID_MAX and GID_MIN/GID_MAX variables, should
* src/newusers.c: Check if the user or group exist using the
external databases (with the libc getpwnam/getgrnam functions).
Refuse to update an user which exist in an external database but
does not exist in the local database.
* src/newusers.c: Check the usernames and groupnames with
check_user_name() and check_group_name()
* src/newusers.c: Use isdigit() for readability.
* src/newusers.c: Check if numerical IDs are valid (no remaining
chars).
* NEWS, src/newusers.c: Fix the support for the NONE crypt method.
* src/newusers.c: Fix shadow group support (the list of admins was
not defined; it is now set to an empty list).
src/chfn.c, src/passwd.c, src/chage.c, src/login.c, src/sulogin.c,
src/chsh.c: Fix call to puts (remove end of line, or use fputs).
* po/*.po: Unfuzzy PO files according to above change.
Daubert for the patch.
* libmisc/salt.c: Include <stdio.h>, needed for stderr and printf
functions.
* lib/encrypt.c: Include <stdio.h>, needed for perror, stderr and
printf functions
* src/usermod.c: sgr_locked exists only if SHADOWGRP is defined.
* src/chgpasswd.c: Only check is the gshadow file exists if
SHADOWGRP is defined.
differ from the old ones. If a requested new value is equal to the old
one, no changes will be performed for that field. If no fields are
changed, usermod will exist successfully with a warning. This avoids
logging changes to syslog when there are actually no changes.
user_newinactive. It is more simple to always have user_<x> as the old
field, and user_new<x> as the new field (even if the field did not change)
instead of changing the algorithm depending on WITH_AUDIT.
unknown GID (either the user was deleted during the user's newgrp
session or the user's passwd entry referenced an invalid group).
Add a syslog warning in that case.
* src/newgrp.c: Add an end of line when reporting an invalid
password.
(it required an argument, but should behave as -D)
* NEWS, man/useradd.8.xml: Document the --defaults option, which
was already described in the useradd's Usage information.
skey and md libraries...
* src/Makefile.am: ...Specify for each binary which library is
required. skey and md are required for the binaries with
authentication of the user (chfn, chsh, login, passwd, su). intl
is required for all. mcrypt is required for user (chfn, chsh,
login, passwd, su, sulogin) and group (newgrp, gpasswd)
authentication and for the creation of passwords (chpasswd,
chgpasswd, gpasswd, newusers, passwd).
similar(), and simple() as unused.
* libmisc/loginprompt.c: Tag the `sig' parameter of login_exit()
as unused.
* src/expiry.c: Tag the `sig' parameter of catch_signals() as
unused.
* src/su.c: Tag the `sig' parameter of catch_signals() as unused.
* src/su.c: Add int parameter to the prototype of oldsig().
* src/login.c: Tag the `sig' parameter of alarm_handler() as
unused.
* src/sulogin.c: Tag the `sig' parameter of catch_signals() as
unused.
* libmisc/getdate.y: Tag the `string' parameter of yyerror() as
unused.
* libmisc/getdate.y: The string provided to yyerror() is const.
* libmisc/getdate.y: Fix the prototypes of yylex() and yyerror().
instead of K&R prototype.
* src/login_nopam.c: Fix the prototypes of list_match(),
user_match(), from_match(), string_match(). There were no
parameters in the prototypes.
* src/login_nopam.c: Fix the prototypes of the function parameter
match_fn of list_match().
* lib/prototypes.h: Typo: login.c -> loginprompt.c
* src/login.c: Remove declaration of dolastlog().
* libmisc/log.c: dolastlog() should not have been changed to static.
Include prototypes.h instead.
and "pwauth.h" only when compiled without PAM support.
* src/chfn.c, src/chsh.c: Do not include <shadow.h>
* lib/commonio.c: Do not include <shadow.h>. Do not include
<pwd.h>. Include "nscd.h" instead of <nscd.h>.
* configure.in: Do not check if shadow.h exist, but make sure it
exists.
* libmisc/pwdcheck.c, src/chfn.c, src/chsh.c, lib/defines.h,
lib/shadowmem.c, lib/shadowio.c, lib/commonio.c:
HAVE_SHADOW_H is no more needed (shadow.h should always exist).
* src/lastlog.c: Fix types, cast umin and umax to uid_t.
* src/lastlog.c: (option -u) user needs to be a signed long, not
uid_t (to accept rangees like -<uid>
gid parameters can be set to -1 to indicate that the original
owners must be kept. Change the types from uid_t/gid_t to a
long int (signed).
* libmisc/copydir.c: Change the copy_entry(), copy_dir(),
copy_symlink(), copy_special(), and copy_file() prototypes
accordingly.
* lib/prototypes.h: Add the parameters' name for the
libmisc/copydir.c functions.
The flags variables are now global.
* New functions: check_perms(), update_gecos(),
get_old_fields(), and check_fields() split out of main().
* Before pam_end(), the return value of the previous
pam API was already checked. No need to validate it again.
* src/chage.c: New function: fail_exit(). Change most of the exit()
to a fail_exit, which makes sure the files are unlocked (new global
variables: pw_locked, spw_locked), the PAM transaction is ended, and
the failure is logged to libaudit (use a global user_name and user_uid
for logging).
* src/chage.c: Compilation fix for PAM support (pamh needs to be
global since the function split).
* src/chage.c: Document process_flags(), check_flags(), check_perms(),
open_files(), and close_files().
* src/chage.c: Split update_age() and get_defaults() out of main()
* src/chage.c: Drop the privileges just after opening the files.
* src/chage.c: Do not log to audit only if the user has an entry in
the shadow file.
* NEWS, src/chage.c (open_files): Also open the password file for
writing. This fix chage when the user only has a password entry (and
no shadow entries).
* src/chage.c (get_defaults): Use default values that don't change the
behavior of the account for the fields that are not specified when the
user has no shadow entry.
