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Use a safer method of creating the temporary password file.

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Submitted by:	dynamo@harvard.net
Obtained from:	OpenBSD
MFC after:	3 days
This commit is contained in:
Chris D. Faulhaber 2001-07-25 11:55:33 +00:00
parent 1e0a94b6a0
commit eea11e0277
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=80319
1 changed files with 8 additions and 8 deletions
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16
usr.sbin/adduser/rmuser.perl
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@ -42,7 +42,7 @@ $ENV{"PATH"} = "/bin:/sbin:/usr/bin:/usr/sbin";
umask(022);
$whoami = $0;
$passwd_file = "/etc/master.passwd";
$new_passwd_file = "${passwd_file}.new.$$";
$ptmp = "/etc/ptmp";
$group_file = "/etc/group";
$new_group_file = "${group_file}.new.$$";
$mail_dir = "/var/mail";
@ -310,10 +310,10 @@ sub update_passwd_file {
print STDERR "Updating password file,";
seek(MASTER_PW, 0, 0);
open(NEW_PW, ">$new_passwd_file") ||
die "\n${whoami}: Error: Couldn't open file ${new_passwd_file}:\n $!\n";
chmod(0600, $new_passwd_file) ||
print STDERR "\n${whoami}: Warning: couldn't set mode of $new_passwd_file to 0600 ($!)\n\tcontinuing, but please check mode of /etc/master.passwd!\n";
sysopen(NEW_PW, $etc_ptmp, O_RDWR|O_CREAT|O_EXCL, 0600) ||
die "\n${whoami}: Error: Couldn't open file ${etc_ptmp}:\n $!\n";
$skipped = 0;
while (<MASTER_PW>) {
if (/^\Q$login_name:/o) {
@ -339,8 +339,8 @@ sub update_passwd_file {
if ($skipped == 0) {
print STDERR "\n${whoami}: Whoops! Didn't find ${login_name}'s entry second time around!\n";
unlink($new_passwd_file) ||
print STDERR "\n${whoami}: Warning: couldn't unlink $new_passwd_file ($!)\n\tPlease investigate, as this file should not be left in the filesystem\n";
unlink($etc_ptmp) ||
print STDERR "\n${whoami}: Warning: couldn't unlink $etc_ptmp ($!)\n\tPlease investigate, as this file should not be left in the filesystem\n";
&unlockpw;
exit 1;
}
@ -349,7 +349,7 @@ sub update_passwd_file {
# Run pwd_mkdb to install the updated password files and databases
print STDERR " updating databases,";
system('/usr/sbin/pwd_mkdb', '-p', ${new_passwd_file});
system('/usr/sbin/pwd_mkdb', '-p', ${passwd_file});
print STDERR " done.\n";
close(MASTER_PW); # Not useful anymore