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Fix getgroups / setgroups tests across platforms

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See #619
This commit is contained in:
Justine Tunney 2022-09-18 03:17:06 -07:00
parent 97bb5a3a80
commit 40991ec992
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GPG key ID: BE714B4575D6E328
3 changed files with 17 additions and 27 deletions
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2
libc/calls/getgroups.c
View file

@ -25,7 +25,7 @@
#include "libc/sysv/errfuns.h"
/**
* Get list of supplementary group IDs
* Gets list of supplementary group IDs
*
* @param size - maximum number of items that can be stored in list
* @param list - buffer to store output gid_t

12
libc/calls/setgroups.c
View file

@ -25,10 +25,16 @@
#include "libc/sysv/errfuns.h"
/**
* Set list of supplementary group IDs
* Sets list of supplementary group IDs.
*
* @param size - number of items in list
* @param list - input set of gid_t to set
* On recent versions of Linux only, it's possible to say:
*
* setgroups(0, NULL);
*
* Which will cause subsequent calls to `EPERM`.
*
* @param size number of items in list
* @param list input set of gid_t to set
* @return -1 w/ EFAULT
*/
int setgroups(size_t size, const uint32_t list[]) {

30
test/libc/calls/getgroups_test.c
View file

@ -18,30 +18,14 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/macros.internal.h"
#include "libc/testlib/testlib.h"
TEST(getgroups, test) {
int rc;
uint32_t res[1000];
rc = getgroups(0, NULL);
if (IsLinux() || IsNetbsd() || IsOpenbsd() || IsFreebsd() || IsXnu()) {
EXPECT_NE(-1, rc);
EXPECT_NE(-1, getgroups(sizeof(res) / sizeof(res[0]), res));
} else {
EXPECT_EQ(-1, rc);
EXPECT_EQ(ENOSYS, errno);
}
}
TEST(setgroups, test) {
int rc;
uint32_t src[5];
EXPECT_EQ(-1, setgroups(0, NULL));
if (IsLinux() || IsNetbsd() || IsOpenbsd() || IsFreebsd() || IsXnu()) {
EXPECT_EQ(EPERM, errno);
EXPECT_EQ(-1, setgroups(sizeof(src) / sizeof(src[0]), src));
} else {
EXPECT_EQ(ENOSYS, errno);
}
int n;
if (IsWindows()) return;
uint32_t G[500];
EXPECT_GT((n = getgroups(ARRAYLEN(G), G)), 0);
if (getuid()) return; // this needs root
EXPECT_SYS(0, 0, setgroups(n, G));
}