path: root/src/misc
diff options
authorJosiah Worcester <>2015-03-15 19:20:53 -0500
committerRich Felker <>2015-03-15 22:32:22 -0400
commit2894a44b40e460fc4112988407818439f2e9672d (patch)
treeed88ad3753488b9b1ff43fdbc2a1c67876735f73 /src/misc
parent962cbfbf864a50aaf88bc59e5c7cf0b664ff599a (diff)
add alternate backend support for getgrouplist
This completes the alternate backend support that was previously added to the getpw* and getgr* functions. Unlike those, though, it unconditionally queries nscd. Any groups from nscd that aren't in the /etc/groups file are added to the returned list, and any that are present in the file are ignored. The purpose of this behavior is to provide a view of the group database consistent with what is observed by the getgr* functions. If group memberships reported by nscd were honored when the corresponding group already has a definition in the /etc/groups file, the user's getgrouplist-based membership in the group would conflict with their non-membership in the reported gr_mem[] for the group. The changes made also make getgrouplist thread-safe and eliminate its clobbering of the global getgrent state.
Diffstat (limited to 'src/misc')
1 files changed, 0 insertions, 24 deletions
diff --git a/src/misc/getgrouplist.c b/src/misc/getgrouplist.c
deleted file mode 100644
index c9a8f090..00000000
--- a/src/misc/getgrouplist.c
+++ /dev/null
@@ -1,24 +0,0 @@
-#define _GNU_SOURCE
-#include <grp.h>
-#include <string.h>
-#include <limits.h>
-int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups)
- size_t n, i;
- struct group *gr;
- if (*ngroups<1) return -1;
- n = *ngroups;
- *groups++ = gid;
- *ngroups = 1;
- setgrent();
- while ((gr = getgrent()) && *ngroups < INT_MAX) {
- for (i=0; gr->gr_mem[i] && strcmp(user, gr->gr_mem[i]); i++);
- if (!gr->gr_mem[i]) continue;
- if (++*ngroups <= n) *groups++ = gr->gr_gid;
- }
- endgrent();
- return *ngroups > n ? -1 : *ngroups;