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Martin Kletzander baae5b4a06 find_new_[gu]id(): Skip over IDs that are reserved for legacy reasons 
Some programs don't support `(uint16_t) -1` or `(uint32_t) -1` as user
or group IDs.  This is because `-1` is used as an error code or as an
unspecified ID, e.g. in `chown(2)` parameters, and in the past, `gid_t`
and `uid_t` have changed width.  For legacy reasons, those values have
been kept reserved in programs today (for example systemd does this; see
the documentation in the link below).

This should not be confused with catching overflow in the ID values,
since that is already caught by our ERANGE checks.  This is about not
using reserved values that have been reserved for legacy reasons.

Link: <https://systemd.io/UIDS-GIDS/>
Reviewed-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2023-02-20 12:10:02 +01:00
..
.indent.pro
Commit the last version from the PLD CVS repository.
2007-10-07 14:36:51 +00:00
addgrps.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
age.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
agetpass.c
agetpass.c: Use SPDX tags
2023-02-16 11:29:33 +01:00
audit_help.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
basename.c
Update licensing info
2021-12-23 19:36:50 -06:00
bit.c
Add bit manipulation functions
2023-01-30 18:24:15 +01:00
btrfs.c
Declare read-only data const
2022-08-06 11:27:56 -05:00
chkname.c
shadow: use relaxed usernames
2022-09-02 20:27:14 -05:00
chkname.h
Update licensing info
2021-12-23 19:36:50 -06:00
chowndir.c
Avoid races in chown_tree()
2022-08-17 12:34:01 -05:00
chowntty.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
cleanup_group.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
cleanup_user.c
Fix typos
2023-02-16 13:23:08 -06:00
cleanup.c
Update licensing info
2021-12-23 19:36:50 -06:00
console.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
copydir.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
csrand.c
Unoptimize the higher part of the domain of csrand_uniform()
2023-01-30 18:24:15 +01:00
date_to_str.c
Use strlcpy(3) instead of its pattern
2022-12-22 18:03:39 -06:00
entry.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
env.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
failure.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
failure.h
Disable utmpx permanently
2022-12-22 10:31:43 +01:00
find_new_gid.c
find_new_[gu]id(): Skip over IDs that are reserved for legacy reasons
2023-02-20 12:10:02 +01:00
find_new_sub_gids.c
Don't redefine errno(3)
2022-12-22 11:43:29 +01:00
find_new_sub_uids.c
Don't redefine errno(3)
2022-12-22 11:43:29 +01:00
find_new_uid.c
find_new_[gu]id(): Skip over IDs that are reserved for legacy reasons
2023-02-20 12:10:02 +01:00
getdate.h
Update licensing info
2021-12-23 19:36:50 -06:00
getdate.y
Use isdigit(3) instead of a reimplementation of it
2021-12-29 02:41:09 +01:00
getgr_nam_gid.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
getrange.c
Declare read-only parameters const
2022-08-06 11:27:56 -05:00
gettime.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
hushed.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
idmapping.c
Use stpeprintf() where appropriate
2023-02-16 11:29:33 +01:00
idmapping.h
Add include for uid_t
2022-08-06 11:27:56 -05:00
isexpired.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
limits.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
list.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
log.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
loginprompt.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
mail.c
Update licensing info
2021-12-23 19:36:50 -06:00
Makefile.am
Add stpecpy()
2023-02-16 11:29:33 +01:00
mempcpy.c
Add mempcpy(3)
2023-02-16 11:29:33 +01:00
motd.c
Drop register keyword
2022-08-06 11:27:56 -05:00
myname.c
Update licensing info
2021-12-23 19:36:50 -06:00
obscure.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
pam_pass_non_interactive.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
pam_pass.c
Don't redefine errno(3)
2022-12-22 11:43:29 +01:00
prefix_flag.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
pwd2spwd.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
pwd_init.c
Assume SIGTTOU is defined
2022-12-15 16:22:05 -06:00
pwdcheck.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
remove_tree.c
Avoid races in remove_tree()
2022-08-17 12:34:01 -05:00
rlogin.c
Assume B[0-9]* macros are defined
2022-12-15 16:22:05 -06:00
root_flag.c
libmisc/root_flag: add tips for --root flag only support abspath
2022-08-06 15:04:06 -05:00
salt.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
setugid.c
Update licensing info
2021-12-23 19:36:50 -06:00
setupenv.c
Merge pull request #451 from hallyn/2021-12-05/license
2022-01-02 18:38:42 -06:00
shell.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
stpecpy.c
Add stpecpy()
2023-02-16 11:29:33 +01:00
stpeprintf.c
Add stpeprintf()
2023-02-16 11:29:33 +01:00
strtoday.c
strtoday.c: remove unused defines.h inclusion
2022-12-22 10:39:45 -06:00
sub.c
Update licensing info
2021-12-23 19:36:50 -06:00
sulog.c
Call NULL by its name
2023-02-02 13:08:30 -06:00
ttytype.c
ttytype(): Fix race
2023-02-09 10:03:03 -06:00
tz.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
ulimit.c
Remove comments that survived the Helicoprion
2022-12-15 16:22:05 -06:00
user_busy.c
Fix typo
2023-02-16 13:23:08 -06:00
utmp.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00
valid.c
Update licensing info
2021-12-23 19:36:50 -06:00
xgetgrgid.c
Fix comments
2023-02-16 13:23:08 -06:00
xgetgrnam.c
Fix comments
2023-02-16 13:23:08 -06:00
xgetpwnam.c
libmisc: fix grammar
2023-01-26 22:44:39 -06:00
xgetpwuid.c
Fix comments
2023-02-16 13:23:08 -06:00
xgetspnam.c
Fix comments
2023-02-16 13:23:08 -06:00
xgetXXbyYY.c
Fix comments
2023-02-16 13:23:08 -06:00
xmalloc.c
Don't test for NULL before calling free(3)
2022-09-29 16:03:53 +02:00
yesno.c
Remove superfluous casts
2023-02-09 10:03:03 -06:00