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author | Josiah Worcester <josiahw@gmail.com> | 2015-03-15 19:20:53 -0500 |
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committer | Rich Felker <dalias@aerifal.cx> | 2015-03-15 22:32:22 -0400 |
commit | 2894a44b40e460fc4112988407818439f2e9672d (patch) | |
tree | ed88ad3753488b9b1ff43fdbc2a1c67876735f73 /src/misc | |
parent | 962cbfbf864a50aaf88bc59e5c7cf0b664ff599a (diff) | |
download | musl-2894a44b40e460fc4112988407818439f2e9672d.tar.gz musl-2894a44b40e460fc4112988407818439f2e9672d.tar.bz2 musl-2894a44b40e460fc4112988407818439f2e9672d.tar.xz musl-2894a44b40e460fc4112988407818439f2e9672d.zip |
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')
-rw-r--r-- | src/misc/getgrouplist.c | 24 |
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; -} |