diff options
Diffstat (limited to 'libc/pwd_grp/initgroups.c')
| -rw-r--r-- | libc/pwd_grp/initgroups.c | 52 |
1 files changed, 27 insertions, 25 deletions
diff --git a/libc/pwd_grp/initgroups.c b/libc/pwd_grp/initgroups.c index fb19c0327..1596298e8 100644 --- a/libc/pwd_grp/initgroups.c +++ b/libc/pwd_grp/initgroups.c @@ -25,15 +25,24 @@ #include <stdlib.h> #include "config.h" +#ifdef __UCLIBC_HAS_THREADS__ +#include <pthread.h> +static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER; +# define LOCK pthread_mutex_lock(&mylock) +# define UNLOCK pthread_mutex_unlock(&mylock); +#else +# define LOCK +# define UNLOCK +#endif + +static char *line_buff = NULL; +static char **members = NULL; + int initgroups(__const char *user, gid_t gid) { register struct group *group; -#ifndef GR_DYNAMIC_GROUP_LIST - gid_t group_list[GR_MAX_GROUPS]; -#else gid_t *group_list = NULL; -#endif register char **tmp_mem; int num_groups; int grp_fd; @@ -43,33 +52,26 @@ int initgroups(__const char *user, gid_t gid) return -1; num_groups = 0; -#ifdef GR_DYNAMIC_GROUP_LIST group_list = (gid_t *) realloc(group_list, 1); -#endif group_list[num_groups] = gid; -#ifndef GR_DYNAMIC_GROUP_LIST - while (num_groups < GR_MAX_GROUPS && - (group = __getgrent(grp_fd)) != NULL) -#else - while ((group = __getgrent(grp_fd)) != NULL) -#endif + LOCK; + while ((group = __getgrent(grp_fd, line_buff, members)) != NULL) + { + if (group->gr_gid != gid); { - if (group->gr_gid != gid); - { - tmp_mem = group->gr_mem; - while (*tmp_mem != NULL) { - if (!strcmp(*tmp_mem, user)) { - num_groups++; -#ifdef GR_DYNAMIC_GROUP_LIST - group_list = (gid_t *) realloc(group_list, num_groups * - sizeof(gid_t *)); -#endif - group_list[num_groups-1] = group->gr_gid; - } - tmp_mem++; + tmp_mem = group->gr_mem; + while (*tmp_mem != NULL) { + if (!strcmp(*tmp_mem, user)) { + num_groups++; + group_list = (gid_t *) realloc(group_list, num_groups * + sizeof(gid_t *)); + group_list[num_groups-1] = group->gr_gid; } + tmp_mem++; } } + } close(grp_fd); + UNLOCK; return setgroups(num_groups, group_list); } |