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use $username for subgid check

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/etc/subgid contains a mapping of user names (not group names) to group
ids as defined in man subgid.
This commit is contained in:
Jochen Sprickerhof 2022-11-18 19:42:12 +01:00 committed by Johannes Schauer Marin Rodrigues
parent 1f15194a6e
commit 374ae3dc99
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 5 additions and 7 deletions
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@ -421,8 +421,6 @@ sub read_subuid_subgid() {
return; return;
} }
my $groupname = getgrgid $REAL_GROUP_ID;
if (!-e "/etc/subgid") { if (!-e "/etc/subgid") {
warning "/etc/subgid doesn't exist"; warning "/etc/subgid doesn't exist";
return; return;
@ -436,25 +434,25 @@ sub read_subuid_subgid() {
or error "cannot open /etc/subgid for reading: $!"; or error "cannot open /etc/subgid for reading: $!";
while (my $line = <$fh>) { while (my $line = <$fh>) {
($n, $subid, $num_subid) = split(/:/, $line, 3); ($n, $subid, $num_subid) = split(/:/, $line, 3);
last if ($n eq $groupname); last if ($n eq $username);
} }
close $fh; close $fh;
if (!length $subid) { if (!length $subid) {
warning "/etc/subgid is empty"; warning "/etc/subgid is empty";
return; return;
} }
if ($n ne $groupname) { if ($n ne $username) {
warning "no entry in /etc/subgid for $groupname"; warning "no entry in /etc/subgid for $username";
return; return;
} }
push @result, ["g", 0, $subid, $num_subid]; push @result, ["g", 0, $subid, $num_subid];
if (scalar(@result) < 2) { if (scalar(@result) < 2) {
warning "/etc/subgid does not contain an entry for $groupname"; warning "/etc/subgid does not contain an entry for $username";
return; return;
} }
if (scalar(@result) > 2) { if (scalar(@result) > 2) {
warning "/etc/subgid contains multiple entries for $groupname"; warning "/etc/subgid contains multiple entries for $username";
return; return;
} }