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2fb3ab2 |
diff --git a/lib/getugroups.c b/lib/getugroups.c
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2fb3ab2 |
index 299bae6..8ece29b 100644
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2fb3ab2 |
--- a/lib/getugroups.c
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2fb3ab2 |
+++ b/lib/getugroups.c
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0363d66 |
@@ -19,6 +19,9 @@
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d66c4db |
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d66c4db |
#include <config.h>
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0b3fe5c |
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0b3fe5c |
+/* We do not need this code if getgrouplist(3) is available. */
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0b3fe5c |
+#ifndef HAVE_GETGROUPLIST
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0b3fe5c |
+
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0363d66 |
#include "getugroups.h"
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0363d66 |
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c77f9b7 |
#include <errno.h>
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d3849ce |
@@ -126,3 +129,4 @@ getugroups (int maxcount, gid_t *grouplist, char const *username,
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0b3fe5c |
}
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c77f9b7 |
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c77f9b7 |
#endif /* HAVE_GRP_H */
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0b3fe5c |
+#endif /* have getgrouplist */
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2fb3ab2 |
diff --git a/lib/mgetgroups.c b/lib/mgetgroups.c
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2fb3ab2 |
index 76474c2..0a9d221 100644
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2fb3ab2 |
--- a/lib/mgetgroups.c
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2fb3ab2 |
+++ b/lib/mgetgroups.c
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d3849ce |
@@ -121,9 +121,17 @@ mgetgroups (char const *username, gid_t gid, gid_t **groups)
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2fb3ab2 |
/* else no username, so fall through and use getgroups. */
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2fb3ab2 |
#endif
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2fb3ab2 |
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2fb3ab2 |
- max_n_groups = (username
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2fb3ab2 |
- ? getugroups (0, NULL, username, gid)
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2fb3ab2 |
- : getgroups (0, NULL));
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2fb3ab2 |
+ if (!username)
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2fb3ab2 |
+ max_n_groups = getgroups(0, NULL);
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2fb3ab2 |
+ else
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2fb3ab2 |
+ {
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2fb3ab2 |
+#ifdef HAVE_GETGROUPLIST
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2fb3ab2 |
+ max_n_groups = 0;
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+ getgrouplist (username, gid, NULL, &max_n_groups);
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2fb3ab2 |
+#else
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2fb3ab2 |
+ max_n_groups = getugroups (0, NULL, username, gid);
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2fb3ab2 |
+#endif
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2fb3ab2 |
+ }
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2fb3ab2 |
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2fb3ab2 |
/* If we failed to count groups because there is no supplemental
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2fb3ab2 |
group support, then return an array containing just GID.
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d3849ce |
@@ -145,10 +153,25 @@ mgetgroups (char const *username, gid_t gid, gid_t **groups)
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2fb3ab2 |
if (g == NULL)
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2fb3ab2 |
return -1;
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2fb3ab2 |
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2fb3ab2 |
- ng = (username
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2fb3ab2 |
- ? getugroups (max_n_groups, g, username, gid)
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2fb3ab2 |
- : getgroups (max_n_groups - (gid != (gid_t) -1),
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2fb3ab2 |
- g + (gid != (gid_t) -1)));
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2fb3ab2 |
+ if (!username)
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4bdb7ac |
+ ng = getgroups (max_n_groups - (gid != (gid_t)-1), g + (gid != (gid_t)-1));
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2fb3ab2 |
+ else
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2fb3ab2 |
+ {
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2fb3ab2 |
+#ifdef HAVE_GETGROUPLIST
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2fb3ab2 |
+ int e;
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2fb3ab2 |
+ ng = max_n_groups;
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2fb3ab2 |
+ while ((e = getgrouplist (username, gid, g, &ng)) == -1
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2fb3ab2 |
+ && ng > max_n_groups)
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+ {
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2fb3ab2 |
+ max_n_groups = ng;
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2fb3ab2 |
+ g = xrealloc (g, max_n_groups * sizeof (GETGROUPS_T));
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+ }
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2fb3ab2 |
+ if (e == -1)
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2fb3ab2 |
+ ng = -1;
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2fb3ab2 |
+#else
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2fb3ab2 |
+ ng = getugroups (max_n_groups, g, username, gid);
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2fb3ab2 |
+#endif
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2fb3ab2 |
+ }
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2fb3ab2 |
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2fb3ab2 |
if (ng < 0)
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2fb3ab2 |
{
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2fb3ab2 |
diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
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2fb3ab2 |
index 62777c7..5180243 100644
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2fb3ab2 |
--- a/m4/jm-macros.m4
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2fb3ab2 |
+++ b/m4/jm-macros.m4
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d3849ce |
@@ -82,6 +82,7 @@ AC_DEFUN([coreutils_MACROS],
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59d9061 |
fchown
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59d9061 |
fchmod
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59d9061 |
ftruncate
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59d9061 |
+ getgrouplist
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59d9061 |
iswspace
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59d9061 |
mkfifo
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59d9061 |
mbrlen
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