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authorLudovic Courtès <ludo@gnu.org>2013-02-16 18:40:39 +0100
committerLudovic Courtès <ludo@gnu.org>2013-02-16 18:41:15 +0100
commit3d2b2676e3fc0a5b243b8a4188d07bba1b4b40a4 (patch)
treed6a74695a759f5a82fefb8afcac8b737d843718a /libguile/posix.c
parent91c763ee3f195dc0e26339608da01250d6924009 (diff)
downloadguile-3d2b2676e3fc0a5b243b8a4188d07bba1b4b40a4.tar.gz
Fix `getgroups' for when zero supplementary group IDs exist.
* libguile/posix.c (scm_getgroups): Return the empty vector when NGROUPS is zero. Reported by Mike Gran <spk121@yahoo.com>.
Diffstat (limited to 'libguile/posix.c')
-rw-r--r--libguile/posix.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/libguile/posix.c b/libguile/posix.c
index 324f21b78..39661a0f6 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -265,8 +265,10 @@ SCM_DEFINE (scm_getgroups, "getgroups", 0, 0, 0,
GETGROUPS_T *groups;
ngroups = getgroups (0, NULL);
- if (ngroups <= 0)
+ if (ngroups < 0)
SCM_SYSERROR;
+ else if (ngroups == 0)
+ return scm_c_make_vector (0, SCM_BOOL_F);
size = ngroups * sizeof (GETGROUPS_T);
groups = scm_malloc (size);