diff options
Diffstat (limited to 'source4/lib/util_getent.c')
| -rw-r--r-- | source4/lib/util_getent.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/source4/lib/util_getent.c b/source4/lib/util_getent.c new file mode 100644 index 00000000000..32641dbf83b --- /dev/null +++ b/source4/lib/util_getent.c @@ -0,0 +1,306 @@ +/* + Unix SMB/CIFS implementation. + Samba utility functions + Copyright (C) Simo Sorce 2001 + Copyright (C) Jeremy Allison 2001 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + + +/**************************************************************** + Returns a single linked list of group entries. + Use grent_free() to free it after use. +****************************************************************/ + +struct sys_grent * getgrent_list(void) +{ + struct sys_grent *glist; + struct sys_grent *gent; + struct group *grp; + + gent = (struct sys_grent *) malloc(sizeof(struct sys_grent)); + if (gent == NULL) { + DEBUG (0, ("Out of memory in getgrent_list!\n")); + return NULL; + } + memset(gent, '\0', sizeof(struct sys_grent)); + glist = gent; + + setgrent(); + grp = getgrent(); + if (grp == NULL) { + endgrent(); + SAFE_FREE(glist); + return NULL; + } + + while (grp != NULL) { + int i,num; + + if (grp->gr_name) { + if ((gent->gr_name = strdup(grp->gr_name)) == NULL) + goto err; + } + if (grp->gr_passwd) { + if ((gent->gr_passwd = strdup(grp->gr_passwd)) == NULL) + goto err; + } + gent->gr_gid = grp->gr_gid; + + /* number of strings in gr_mem */ + for (num = 0; grp->gr_mem[num]; num++) + ; + + /* alloc space for gr_mem string pointers */ + if ((gent->gr_mem = (char **) malloc((num+1) * sizeof(char *))) == NULL) + goto err; + + memset(gent->gr_mem, '\0', (num+1) * sizeof(char *)); + + for (i=0; i < num; i++) { + if ((gent->gr_mem[i] = strdup(grp->gr_mem[i])) == NULL) + goto err; + } + gent->gr_mem[num] = NULL; + + grp = getgrent(); + if (grp) { + gent->next = (struct sys_grent *) malloc(sizeof(struct sys_grent)); + if (gent->next == NULL) + goto err; + gent = gent->next; + memset(gent, '\0', sizeof(struct sys_grent)); + } + } + + endgrent(); + return glist; + + err: + + endgrent(); + DEBUG(0, ("Out of memory in getgrent_list!\n")); + grent_free(glist); + return NULL; +} + +/**************************************************************** + Free the single linked list of group entries made by + getgrent_list() +****************************************************************/ + +void grent_free (struct sys_grent *glist) +{ + while (glist) { + struct sys_grent *prev; + + SAFE_FREE(glist->gr_name); + SAFE_FREE(glist->gr_passwd); + if (glist->gr_mem) { + int i; + for (i = 0; glist->gr_mem[i]; i++) + SAFE_FREE(glist->gr_mem[i]); + SAFE_FREE(glist->gr_mem); + } + prev = glist; + glist = glist->next; + SAFE_FREE(prev); + } +} + +/**************************************************************** + Returns a single linked list of passwd entries. + Use pwent_free() to free it after use. +****************************************************************/ + +struct sys_pwent * getpwent_list(void) +{ + struct sys_pwent *plist; + struct sys_pwent *pent; + struct passwd *pwd; + + pent = (struct sys_pwent *) malloc(sizeof(struct sys_pwent)); + if (pent == NULL) { + DEBUG (0, ("Out of memory in getpwent_list!\n")); + return NULL; + } + plist = pent; + + setpwent(); + pwd = getpwent(); + while (pwd != NULL) { + memset(pent, '\0', sizeof(struct sys_pwent)); + if (pwd->pw_name) { + if ((pent->pw_name = strdup(pwd->pw_name)) == NULL) + goto err; + } + if (pwd->pw_passwd) { + if ((pent->pw_passwd = strdup(pwd->pw_passwd)) == NULL) + goto err; + } + pent->pw_uid = pwd->pw_uid; + pent->pw_gid = pwd->pw_gid; + if (pwd->pw_gecos) { + if ((pent->pw_name = strdup(pwd->pw_gecos)) == NULL) + goto err; + } + if (pwd->pw_dir) { + if ((pent->pw_name = strdup(pwd->pw_dir)) == NULL) + goto err; + } + if (pwd->pw_shell) { + if ((pent->pw_name = strdup(pwd->pw_shell)) == NULL) + goto err; + } + + pwd = getpwent(); + if (pwd) { + pent->next = (struct sys_pwent *) malloc(sizeof(struct sys_pwent)); + if (pent->next == NULL) + goto err; + pent = pent->next; + } + } + + endpwent(); + return plist; + + err: + + endpwent(); + DEBUG(0, ("Out of memory in getpwent_list!\n")); + pwent_free(plist); + return NULL; +} + +/**************************************************************** + Free the single linked list of passwd entries made by + getpwent_list() +****************************************************************/ + +void pwent_free (struct sys_pwent *plist) +{ + while (plist) { + struct sys_pwent *prev; + + SAFE_FREE(plist->pw_name); + SAFE_FREE(plist->pw_passwd); + SAFE_FREE(plist->pw_gecos); + SAFE_FREE(plist->pw_dir); + SAFE_FREE(plist->pw_shell); + + prev = plist; + plist = plist->next; + SAFE_FREE(prev); + } +} + +/**************************************************************** + Add the individual group users onto the list. +****************************************************************/ + +static struct sys_userlist *add_members_to_userlist(struct sys_userlist *list_head, const struct group *grp) +{ + size_t num_users, i; + + /* Count the number of users. */ + for (num_users = 0; grp->gr_mem[num_users]; num_users++) + ; + + for (i = 0; i < num_users; i++) { + struct sys_userlist *entry = (struct sys_userlist *)malloc(sizeof(*entry)); + if (entry == NULL) { + free_userlist(list_head); + return NULL; + } + entry->unix_name = (char *)strdup(grp->gr_mem[i]); + if (entry->unix_name == NULL) { + SAFE_FREE(entry); + free_userlist(list_head); + return NULL; + } + DLIST_ADD(list_head, entry); + } + return list_head; +} + +/**************************************************************** + Get the list of UNIX users in a group. + We have to enumerate the /etc/group file as some UNIX getgrnam() + calls won't do that for us (notably Tru64 UNIX). +****************************************************************/ + +struct sys_userlist *get_users_in_group(const char *gname) +{ + struct sys_userlist *list_head = NULL; + struct group *gptr; + fstring domain; + fstring groupname; + DOM_SID sid; + enum SID_NAME_USE name_type; + + /* No point using winbind if we can't split it in the + first place */ + if (split_domain_and_name(gname, domain, groupname)) { + + /* + * If we're doing this via winbindd, don't do the + * entire group list enumeration as we know this is + * pointless (and slow). + */ + + if (winbind_lookup_name(domain, groupname, &sid, &name_type) + && name_type == SID_NAME_DOM_GRP) { + if ((gptr = (struct group *)getgrnam(gname)) == NULL) + return NULL; + return add_members_to_userlist(list_head, gptr); + } + } + +#if !defined(BROKEN_GETGRNAM) + if ((gptr = (struct group *)getgrnam(gname)) == NULL) + return NULL; + return add_members_to_userlist(list_head, gptr); +#else + /* BROKEN_GETGRNAM - True64 */ + setgrent(); + while((gptr = getgrent()) != NULL) { + if (strequal(gname, gptr->gr_name)) { + list_head = add_members_to_userlist(list_head, gptr); + if (list_head == NULL) + return NULL; + } + } + endgrent(); + return list_head; +#endif +} + +/**************************************************************** + Free list allocated above. +****************************************************************/ + +void free_userlist(struct sys_userlist *list_head) +{ + while (list_head) { + struct sys_userlist *old_head = list_head; + DLIST_REMOVE(list_head, list_head); + SAFE_FREE(old_head->unix_name); + SAFE_FREE(old_head); + } +} |