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| author | Rich Felker <dalias@aerifal.cx> | 2011-04-13 09:39:47 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-04-13 09:39:47 -0400 |
| commit | 91e836fda7d4e2a4ba38d5faec6e3876b1b5e179 (patch) | |
| tree | 1ba65fb9d302f2f0c0a16ca9d3dfce1b91918a5a | |
| parent | 3f44f298e46b78cb8fe80be76798e799589ae55e (diff) | |
| download | musl-91e836fda7d4e2a4ba38d5faec6e3876b1b5e179.tar.gz musl-91e836fda7d4e2a4ba38d5faec6e3876b1b5e179.tar.xz musl-91e836fda7d4e2a4ba38d5faec6e3876b1b5e179.zip | |
implement getgrouplist (for initgroups), formerly dummied-out v0.7.8
| -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; } |