Bug 227541 - pw(8): fix 'pw userdel' problem with NIS Master
Summary: pw(8): fix 'pw userdel' problem with NIS Master
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: bin (show other bugs)
Version: 11.1-STABLE
Hardware: Any Any
: --- Affects Many People
Assignee: freebsd-bugs mailing list
URL:
Keywords: patch
Depends on:
Blocks:
 
Reported: 2018-04-16 06:04 UTC by hsakamt
Modified: 2018-04-19 04:53 UTC (History)
0 users

See Also:


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Description hsakamt 2018-04-16 06:04:50 UTC
Hello,

I setup a FreeBSD box as NIS master. The 'useradd' and 'usermod' options of the 'pw' command work fine, but there are two problems with the 'userdel' option.

1. 'pw userdel' always fail with error:
pw: pw_copy(): No such file or directory

Because "GETPWNAM(user)" at line 102 of pwdupd.c seems to have destroyed the 'pwd' global variable. 

2. 'pw userdel' does not update "NIS maps" with '-Y' option.


Workaround patch for 11-STABLE:

diff -u pw_user.c.orig pw_user.c
--- pw_user.c.orig      2018-04-16 14:26:59.461462000 +0900
+++ pw_user.c   2018-04-16 14:27:21.843681000 +0900
@@ -963,7 +963,7 @@
        else
                grname[0] = '\0';
 
-       rc = delpwent(pwd);
+       rc = delpwent(nis ? pw_dup(pwd) : pwd);
        if (rc == -1)
                err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
        else if (rc != 0)
@@ -1024,6 +1024,9 @@
                     "completely ");
        }
 
+       if (nis && nis_update() == 0)
+               pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
+
        return (EXIT_SUCCESS);
 }
 
Thank you.
Comment 1 hsakamt 2018-04-19 04:53:45 UTC
Sorry, my patch was incomplete and failed without '-Y' option. The 'pwd' always need to be duplicated.

patch:
--- pw_user.c.orig	2018-04-16 14:26:59.461462000 +0900
+++ pw_user.c	2018-04-19 13:16:14.015451000 +0900
@@ -963,7 +963,7 @@
 	else
 		grname[0] = '\0';
 
-	rc = delpwent(pwd);
+	rc = delpwent(pw_dup(pwd));
 	if (rc == -1)
 		err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 	else if (rc != 0)
@@ -1024,6 +1024,9 @@
 		     "completely ");
 	}
 
+	if (nis && nis_update() == 0)
+		pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
+
 	return (EXIT_SUCCESS);
 }
 


# grep passwd /etc/nsswitch.conf 
passwd: compat
passwd_compat: nis

And I add '+:::::::::' line in /etc/master.passwd


original 'pw':
# pw useradd test -Y                          (OK)
NIS Map update started ...
# pw userdel test01 -Y                        (NG)
pw: pw_copy(): No such file or directory
# pw useradd test                             (OK)
# pw userdel test                             (NG)
pw: pw_copy(): No such file or directory

my old patched 'pw':
# ./pw useradd test01 -Y                      (OK)
NIS Map update started ...
# ./pw userdel test01 -Y                      (OK)
NIS Map update started ...
# ./pw useradd test01                         (OK)
# ./pw userdel test01                         (NG)
pw: pw_copy(): No such file or directory

new patched 'pw':
# ./pw.new useradd test01 -Y                  (OK)
NIS Map update started ...
# ./pw.new userdel test01 -Y                  (OK)
NIS Map update started on ...
# ./pw.new useradd test01                     (OK)
# ./pw.new userdel test01                     (OK)

Thank you.