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pw usermod: Properly deal with empty secondary group lists (-G '')

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"pw usermod someuser -G ''" is supposed make sure that someuser
doesn't have any secondary group memberships.

Previouly it was a nop because split_groups() only intitialised
"groups" if at least one group was specified. As a result the
existing secondary group memberships were kept.

PR:		221417
Submitted by:	Fabian Keil
Obtained from:	ElectroBSD
MFC after:	1 week
Relnotes:	yes
This commit is contained in:
Ed Maste 2017-08-19 00:19:23 +00:00
parent bdab1e7024
commit 3dc869c257
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=322677
2 changed files with 5 additions and 2 deletions
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4
usr.sbin/pw/pw_user.c
View File

@ -1087,10 +1087,10 @@ split_groups(StringList **groups, char *groupsstr)
char *p;
char tok[] = ", \t";
if (*groups == NULL)
*groups = sl_init();
for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) {
grp = group_from_name_or_id(p);
if (*groups == NULL)
*groups = sl_init();
sl_add(*groups, newstr(grp->gr_name));
}
}

3
usr.sbin/pw/tests/pw_usermod_test.sh
View File

@ -128,6 +128,9 @@ user_mod_nogroups_body() {
atf_check -s exit:0 ${PW} usermod foo -G test3,test4
atf_check -s exit:0 -o inline:"test3\ntest4\n" \
awk -F\: '$4 == "foo" { print $1 }' ${HOME}/group
atf_check -s exit:0 ${PW} usermod foo -G ""
atf_check -s exit:0 -o empty \
awk -F\: '$4 == "foo" { print $1 }' ${HOME}/group
}
atf_test_case user_mod_rename