diff options
Diffstat (limited to 'inet/getnetgrent_r.c')
| -rw-r--r-- | inet/getnetgrent_r.c | 133 |
1 files changed, 69 insertions, 64 deletions
diff --git a/inet/getnetgrent_r.c b/inet/getnetgrent_r.c index 640210ab2e..97b2b809f0 100644 --- a/inet/getnetgrent_r.c +++ b/inet/getnetgrent_r.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1996,1997,1998,1999,2002,2004 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004, 2005 + Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -16,6 +17,7 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <assert.h> #include <bits/libc-lock.h> #include <errno.h> #include <netdb.h> @@ -33,15 +35,13 @@ __libc_lock_define_initialized (static, lock) static struct __netgrent dataset; /* The lookup function for the first entry of this service. */ -extern int __nss_netgroup_lookup (service_user **nip, const char *name, +extern int __nss_netgroup_lookup (service_user **nipp, const char *name, void **fctp) internal_function; - -/* Set up NIP to run through the services. If ALL is zero, use NIP's - current location if it's not nil. Return nonzero if there are no +/* Set up NIP to run through the services. Return nonzero if there are no services (left). */ -static enum nss_status -setup (void **fctp, const char *func_name, int all, service_user **nipp) +static int +setup (void **fctp, service_user **nipp) { /* Remember the first service_entry, it's always the same. */ static service_user *startp; @@ -51,7 +51,7 @@ setup (void **fctp, const char *func_name, int all, service_user **nipp) { /* Executing this more than once at the same time must yield the same result every time. So we need no locking. */ - no_more = __nss_netgroup_lookup (nipp, func_name, fctp); + no_more = __nss_netgroup_lookup (nipp, "setnetgrent", fctp); startp = no_more ? (service_user *) -1 : *nipp; } else if (startp == (service_user *) -1) @@ -59,11 +59,10 @@ setup (void **fctp, const char *func_name, int all, service_user **nipp) return 1; else { - if (all || *nipp == NULL) - /* Reset to the beginning of the service list. */ - *nipp = startp; + /* Reset to the beginning of the service list. */ + *nipp = startp; /* Look up the first function. */ - no_more = __nss_lookup (nipp, func_name, fctp); + no_more = __nss_lookup (nipp, "setnetgrent", fctp); } return no_more; } @@ -87,6 +86,20 @@ free_memory (struct __netgrent *data) } } +static void +endnetgrent_hook (struct __netgrent *datap) +{ + enum nss_status (*endfct) (struct __netgrent *); + + if (datap->nip == NULL) + return; + + endfct = __nss_lookup_function (datap->nip, "endnetgrent"); + if (endfct != NULL) + (void) (*endfct) (datap); + datap->nip = NULL; +} + static int internal_function __internal_setnetgrent_reuse (const char *group, struct __netgrent *datap, @@ -100,14 +113,29 @@ __internal_setnetgrent_reuse (const char *group, struct __netgrent *datap, enum nss_status status = NSS_STATUS_UNAVAIL; struct name_list *new_elem; + /* Free data from previous service. */ + endnetgrent_hook (datap); + /* Cycle through all the services and run their setnetgrent functions. */ - int no_more = setup (&fct.ptr, "setnetgrent", 1, &datap->nip); + int no_more = setup (&fct.ptr, &datap->nip); while (! no_more) { + assert (datap->data == NULL); + /* Ignore status, we force check in `__nss_next'. */ status = (*fct.f) (group, datap); + service_user *old_nip = datap->nip; no_more = __nss_next (&datap->nip, "setnetgrent", &fct.ptr, status, 0); + + if (status == NSS_STATUS_SUCCESS && ! no_more) + { + enum nss_status (*endfct) (struct __netgrent *); + + endfct = __nss_lookup_function (old_nip, "endnetgrent"); + if (endfct != NULL) + (void) (*endfct) (datap); + } } /* Add the current group to the list of known groups. */ @@ -157,34 +185,13 @@ setnetgrent (const char *group) return result; } - void internal_endnetgrent (struct __netgrent *datap); libc_hidden_proto (internal_endnetgrent) void internal_endnetgrent (struct __netgrent *datap) { - service_user *old_nip; - union - { - enum nss_status (*f) (struct __netgrent *); - void *ptr; - } fct; - - /* Remember which was the last used service. */ - old_nip = datap->nip; - - /* Cycle through all the services and run their endnetgrent functions. */ - int no_more = setup (&fct.ptr, "endnetgrent", 1, &datap->nip); - while (! no_more) - { - /* Ignore status, we force check in `__nss_next'. */ - (void) (*fct.f) (datap); - - no_more = (datap->nip == old_nip - || __nss_next (&datap->nip, "endnetgrent", &fct.ptr, 0, 1)); - } - + endnetgrent_hook (datap); /* Now free list of all netgroup names from last run. */ free_memory (datap); } @@ -213,11 +220,7 @@ internal_getnetgrent_r (char **hostp, char **userp, char **domainp, struct __netgrent *datap, char *buffer, size_t buflen, int *errnop) { - union - { - enum nss_status (*f) (struct __netgrent *, char *, size_t, int *); - void *ptr; - } fct; + enum nss_status (*fct) (struct __netgrent *, char *, size_t, int *); /* Initialize status to return if no more functions are found. */ enum nss_status status = NSS_STATUS_NOTFOUND; @@ -225,10 +228,12 @@ internal_getnetgrent_r (char **hostp, char **userp, char **domainp, /* Run through available functions, starting with the same function last run. We will repeat each function as long as it succeeds, and then go on to the next service action. */ - int no_more = setup (&fct.ptr, "getnetgrent_r", 0, &datap->nip); + int no_more = (datap->nip == NULL + || (fct = __nss_lookup_function (datap->nip, "getnetgrent_r")) + == NULL); while (! no_more) { - status = (*fct.f) (datap, buffer, buflen, &errno); + status = (*fct) (datap, buffer, buflen, &errno); if (status == NSS_STATUS_RETURN) { @@ -246,8 +251,12 @@ internal_getnetgrent_r (char **hostp, char **userp, char **domainp, datap, errnop); } - if (found) - continue; + if (found && datap->nip != NULL) + { + fct = __nss_lookup_function (datap->nip, "getnetgrent_r"); + if (fct != NULL) + continue; + } } else if (status == NSS_STATUS_SUCCESS && datap->type == group_val) { @@ -279,7 +288,7 @@ internal_getnetgrent_r (char **hostp, char **userp, char **domainp, } } - no_more = __nss_next (&datap->nip, "getnetgrent_r", &fct.ptr, status, 0); + break; } if (status == NSS_STATUS_SUCCESS) @@ -322,16 +331,8 @@ innetgr (const char *netgroup, const char *host, const char *user, int (*f) (const char *, struct __netgrent *); void *ptr; } setfct; - union - { - void (*f) (struct __netgrent *); - void *ptr; - } endfct; - union - { - int (*f) (struct __netgrent *, char *, size_t, int *); - void *ptr; - } getfct; + void (*endfct) (struct __netgrent *); + int (*getfct) (struct __netgrent *, char *, size_t, int *); struct __netgrent entry; int result = 0; const char *current_group = netgroup; @@ -345,18 +346,21 @@ innetgr (const char *netgroup, const char *host, const char *user, the work during one walk through the service list. */ while (1) { - int no_more = setup (&setfct.ptr, "setnetgrent", 1, &entry.nip); + int no_more = setup (&setfct.ptr, &entry.nip); while (! no_more) { + assert (entry.data == NULL); + /* Open netgroup. */ enum nss_status status = (*setfct.f) (current_group, &entry); if (status == NSS_STATUS_SUCCESS - && __nss_lookup (&entry.nip, "getnetgrent_r", &getfct.ptr) == 0) + && (getfct = __nss_lookup_function (entry.nip, "getnetgrent_r")) + != NULL) { char buffer[1024]; - while ((*getfct.f) (&entry, buffer, sizeof buffer, &errno) + while ((*getfct) (&entry, buffer, sizeof buffer, &errno) == NSS_STATUS_SUCCESS) { if (entry.type == group_val) @@ -405,17 +409,18 @@ innetgr (const char *netgroup, const char *host, const char *user, } } - if (result != 0) - break; - /* If we found one service which does know the given netgroup we don't try further. */ status = NSS_STATUS_RETURN; } /* Free all resources of the service. */ - if (__nss_lookup (&entry.nip, "endnetgrent", &endfct.ptr) == 0) - (*endfct.f) (&entry); + endfct = __nss_lookup_function (entry.nip, "endnetgrent"); + if (endfct != NULL) + (*endfct) (&entry); + + if (result != 0) + break; /* Look for the next service. */ no_more = __nss_next (&entry.nip, "setnetgrent", @@ -439,6 +444,6 @@ innetgr (const char *netgroup, const char *host, const char *user, /* Free the memory. */ free_memory (&entry); - return result; + return result == 1; } libc_hidden_def (innetgr) |