diff options
| -rw-r--r-- | src/misc/getgrouplist.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/src/misc/getgrouplist.c b/src/misc/getgrouplist.c index 88f273d7..63557afe 100644 --- a/src/misc/getgrouplist.c +++ b/src/misc/getgrouplist.c @@ -1,11 +1,23 @@ #include <grp.h> - -/* FIXME */ +#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; - *groups = gid; + n = *ngroups; + *groups++ = gid; *ngroups = 1; - return 0; + + 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; } |