Equivalent of `mkdir -p`. It will create all parent directories.
Example: `useradd -d /home2/testu1 -m testu1`

Based on shadow-maint#2 by Thorsten Kukuk
and Thorsten Behrens which was Code from pwdutils 3.2.2 with slight adaptations.

Equivalent of `mkdir -p`. It will create all parent directories.
Example: `useradd -d /home2/testu1 -m testu1`

Based on shadow-maint#2 by Thorsten Kukuk
and Thorsten Behrens which was Code from pwdutils 3.2.2 with slight adaptations.

Adapted to so it applies to current code.

A crypt method needs to be specified before the rounds can set:

    #0  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp-sse4_2.S:227
    shadow-maint#1  0x0000555555557755 in process_flags (argv=0x7fffffffe4d8, argc=3) at chgpasswd.c:188
    shadow-maint#2  main (argc=3, argv=0x7fffffffe4d8) at chgpasswd.c:427

    chgpasswd.c:188:42: warning: use of NULL where non-null expected [CWE-476] [-Wanalyzer-null-argument]

A crypt method needs to be specified before the rounds can set:

    #0  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp-sse4_2.S:227
    shadow-maint#1  0x0000555555557755 in process_flags (argv=0x7fffffffe4d8, argc=3) at chgpasswd.c:188
    shadow-maint#2  main (argc=3, argv=0x7fffffffe4d8) at chgpasswd.c:427

    chgpasswd.c:188:42: warning: use of NULL where non-null expected [CWE-476] [-Wanalyzer-null-argument]

A crypt method needs to be specified before the rounds can set:

    #0  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp-sse4_2.S:227
    shadow-maint#1  0x0000555555557755 in process_flags (argv=0x7fffffffe4d8, argc=3) at chgpasswd.c:188
    shadow-maint#2  main (argc=3, argv=0x7fffffffe4d8) at chgpasswd.c:427

    chgpasswd.c:188:42: warning: use of NULL where non-null expected [CWE-476] [-Wanalyzer-null-argument]

Free the actual struct of the removed entry.

Example userdel report:

    Direct leak of 40 byte(s) in 1 object(s) allocated from:
        #0 0x55b230efe857 in reallocarray (./src/userdel+0xda857)
        shadow-maint#1 0x55b230f6041f in mallocarray ./lib/./alloc.h:97:9
        shadow-maint#2 0x55b230f6041f in commonio_open ./lib/commonio.c:563:7
        shadow-maint#3 0x55b230f39098 in open_files ./src/userdel.c:555:6
        shadow-maint#4 0x55b230f39098 in main ./src/userdel.c:1189:2
        shadow-maint#5 0x7f9b48c64189 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

A crypt method needs to be specified before the rounds can set:

    #0  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp-sse4_2.S:227
    shadow-maint#1  0x0000555555557755 in process_flags (argv=0x7fffffffe4d8, argc=3) at chgpasswd.c:188
    shadow-maint#2  main (argc=3, argv=0x7fffffffe4d8) at chgpasswd.c:427

    chgpasswd.c:188:42: warning: use of NULL where non-null expected [CWE-476] [-Wanalyzer-null-argument]

Free the actual struct of the removed entry.

Example userdel report:

    Direct leak of 40 byte(s) in 1 object(s) allocated from:
        #0 0x55b230efe857 in reallocarray (./src/userdel+0xda857)
        #1 0x55b230f6041f in mallocarray ./lib/./alloc.h:97:9
        #2 0x55b230f6041f in commonio_open ./lib/commonio.c:563:7
        #3 0x55b230f39098 in open_files ./src/userdel.c:555:6
        #4 0x55b230f39098 in main ./src/userdel.c:1189:2
        #5 0x7f9b48c64189 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

'path' will only copy contents from 'bhome', which itself is a dup of
'prefix_user_home'.  Thus it only needs to be able to hold the contents
of that string (thus, strlen(3) + 1 for the NUL).

We don't add any characters that were not present in the original
string (but we do collapse adjacent slashes), and thus the 'path' string
may be shorter or as long as 'bhome', but certainly not longer.

This seems to have been an off-by-one calculation, as this code has
never needed space for an extra byte, AFAICS.

Fixes: b3b6d9d (2018-05-15; "Create parent dirs for useradd -m")
Link: <shadow-maint#112>
Link: <shadow-maint#2>
Cc: Michael Vetter <jubalh@iodoru.org>
Cc: Thorsten Behrens <thb@documentfoundation.org>
Cc: Thorsten Kukuk <kukuk@suse.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Eric Seifert <seiferteric@gmail.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

'path' will only copy contents from 'bhome', which itself is a dup of
'prefix_user_home'.  Thus it only needs to be able to hold the contents
of that string (thus, strlen(3) + 1 for the NUL).

We don't add any characters that were not present in the original
string (but we do collapse adjacent slashes), and thus the 'path' string
may be shorter or as long as 'bhome', but certainly not longer.

This seems to have been an off-by-one calculation, as this code has
never needed space for an extra byte, AFAICS.

Fixes: b3b6d9d (2018-05-15; "Create parent dirs for useradd -m")
Link: <shadow-maint#112>
Link: <shadow-maint#2>
Cc: Michael Vetter <jubalh@iodoru.org>
Cc: Thorsten Behrens <thb@documentfoundation.org>
Cc: Thorsten Kukuk <kukuk@suse.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Eric Seifert <seiferteric@gmail.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

'path' will only copy contents from 'bhome', which itself is a dup of
'prefix_user_home'.  Thus it only needs to be able to hold the contents
of that string (thus, strlen(3) + 1 for the NUL).

We don't add any characters that were not present in the original
string (but we do collapse adjacent slashes), and thus the 'path' string
may be shorter or as long as 'bhome', but certainly not longer.

This seems to have been an off-by-one calculation, as this code has
never needed space for an extra byte, AFAICS.

Fixes: b3b6d9d (2018-05-15; "Create parent dirs for useradd -m")
Link: <shadow-maint#112>
Link: <shadow-maint#2>
Cc: Michael Vetter <jubalh@iodoru.org>
Cc: Thorsten Behrens <thb@documentfoundation.org>
Cc: Thorsten Kukuk <kukuk@suse.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Eric Seifert <seiferteric@gmail.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>