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rb_group_member: Simplify

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This commit is contained in:
Nobuyoshi Nakada 2021-10-11 23:35:26 +09:00
parent 9a3333986f
commit 8f480eafab
Notes: git 2021-10-14 00:20:41 +09:00 
Merged: https://github.com/ruby/ruby/pull/4963
1 changed files with 4 additions and 20 deletions
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file.c
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@ -1451,7 +1451,7 @@ rb_group_member(GETGROUPS_T gid)
return FALSE;
#else
int rv = FALSE;
int groups = 16;
int groups;
VALUE v = 0;
GETGROUPS_T *gary;
int anum = -1;
@ -1459,25 +1459,9 @@ rb_group_member(GETGROUPS_T gid)
if (getgid() == gid || getegid() == gid)
return TRUE;
/*
* On Mac OS X (Mountain Lion), NGROUPS is 16. But libc and kernel
* accept more larger value.
* So we don't trunk NGROUPS anymore.
*/
while (groups <= RB_MAX_GROUPS) {
gary = ALLOCV_N(GETGROUPS_T, v, groups);
anum = getgroups(groups, gary);
if (anum != -1 && anum != groups)
break;
groups *= 2;
if (v) {
ALLOCV_END(v);
v = 0;
}
}
if (anum == -1)
return FALSE;
groups = getgroups(0, NULL);
gary = ALLOCV_N(GETGROUPS_T, v, groups);
anum = getgroups(groups, gary);
while (--anum >= 0) {
if (gary[anum] == gid) {
rv = TRUE;