diff options
Diffstat (limited to 'libpwdgrp')
| -rw-r--r-- | libpwdgrp/pwd_grp.c | 70 |
1 files changed, 47 insertions, 23 deletions
diff --git a/libpwdgrp/pwd_grp.c b/libpwdgrp/pwd_grp.c index 206519084..98b8367ca 100644 --- a/libpwdgrp/pwd_grp.c +++ b/libpwdgrp/pwd_grp.c @@ -620,43 +620,67 @@ struct spwd *sgetspent(const char *string) } #endif -int initgroups(const char *user, gid_t gid) +static gid_t *getgrouplist_internal(int *ngroups_ptr, const char *user, gid_t gid) { FILE *grfile; gid_t *group_list; - int num_groups, rv; - char **m; + int ngroups; struct group group; char buff[PWD_BUFFER_SIZE]; - rv = -1; - grfile = fopen_for_read(_PATH_GROUP); - if (grfile != NULL) { - - /* We alloc space for 8 gids at a time. */ - group_list = xmalloc(8 * sizeof(gid_t *)); - *group_list = gid; - num_groups = 1; + /* We alloc space for 8 gids at a time. */ + group_list = xmalloc(8 * sizeof(group_list[0])); + group_list[0] = gid; + ngroups = 1; + grfile = fopen_for_read(_PATH_GROUP); + if (grfile) { while (!bb__pgsreader(bb__parsegrent, &group, buff, sizeof(buff), grfile)) { + char **m; assert(group.gr_mem); /* Must have at least a NULL terminator. */ - if (group.gr_gid != gid) { - for (m = group.gr_mem; *m; m++) { - if (!strcmp(*m, user)) { - group_list = xrealloc_vector(group_list, 3, num_groups); - group_list[num_groups++] = group.gr_gid; - break; - } - } + if (group.gr_gid == gid) + continue; + for (m = group.gr_mem; *m; m++) { + if (strcmp(*m, user) != 0) + continue; + group_list = xrealloc_vector(group_list, 3, ngroups); + group_list[ngroups++] = group.gr_gid; + break; } } - - rv = setgroups(num_groups, group_list); - free(group_list); fclose(grfile); } + *ngroups_ptr = ngroups; + return group_list; +} - return rv; +int initgroups(const char *user, gid_t gid) +{ + int ngroups; + gid_t *group_list = getgrouplist_internal(&ngroups, user, gid); + + if (!group_list) + return -1; + + ngroups = setgroups(ngroups, group_list); + free(group_list); + return ngroups; +} + +/* TODO: uclibc needs this ported to it! */ +int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups) +{ + int ngroups_old = *ngroups; + gid_t *group_list = getgrouplist_internal(ngroups, user, gid); + + if (*ngroups <= ngroups_old) { + ngroups_old = *ngroups; + memcpy(groups, group_list, ngroups_old * sizeof(groups[0])); + } else { + ngroups_old = -1; + } + free(group_list); + return ngroups_old; } int putpwent(const struct passwd *__restrict p, FILE *__restrict f) |