From 8bffb2145a7b83e294a52f9f157405ef705c893d Mon Sep 17 00:00:00 2001 From: drepper Date: Sun, 12 Oct 1997 03:02:39 +0000 Subject: [PATCH] Removed for Solaris compatibility --- nis/lckcache.c | 181 --------------------------------- nis/nis_cache.c | 307 -------------------------------------------------------- 2 files changed, 488 deletions(-) delete mode 100644 nis/lckcache.c delete mode 100644 nis/nis_cache.c diff --git a/nis/lckcache.c b/nis/lckcache.c deleted file mode 100644 index f8c0a97296..0000000000 --- a/nis/lckcache.c +++ /dev/null @@ -1,181 +0,0 @@ -/* Handle locking of NIS+ cache file. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library and based on shadow/lckfile.c. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* How long to wait for getting the lock before returning with an - error. */ -#define TIMEOUT 5 /* sec */ - - -/* File descriptor for lock file. */ -static int lock_fd = -1; - -/* Prevent problems in multithreaded program by using mutex. */ -__libc_lock_define_initialized (static, lock) - - -/* Prototypes for local functions. */ -static void noop_handler __P ((int __sig)); - - -/* We cannot simply return in error cases. We have to close the file - and perhaps restore the signal handler. */ -#define RETURN_CLOSE_FD(code) \ - do { \ - if ((code) < 0 && lock_fd >= 0) \ - { \ - close (lock_fd); \ - lock_fd = -1; \ - } \ - __libc_lock_unlock (lock); \ - return (code); \ - } while (0) - -#define RETURN_RESTORE_HANDLER(code) \ - do { \ - /* Restore old action handler for alarm. We don't need to know \ - about the current one. */ \ - sigaction (SIGALRM, &saved_act, NULL); \ - RETURN_CLOSE_FD (code); \ - } while (0) - -#define RETURN_CLEAR_ALARM(code) \ - do { \ - /* Clear alarm. */ \ - alarm (0); \ - /* Restore old set of handled signals. We don't need to know \ - about the current one.*/ \ - sigprocmask (SIG_SETMASK, &saved_set, NULL); \ - RETURN_RESTORE_HANDLER (code); \ - } while (0) - - -int -__nis_lock_cache (void) -{ - int flags; - sigset_t saved_set; /* Saved set of caught signals. */ - struct sigaction saved_act; /* Saved signal action. */ - sigset_t new_set; /* New set of caught signals. */ - struct sigaction new_act; /* New signal action. */ - struct flock fl; /* Information struct for locking. */ - int result; - - if (lock_fd != -1) - /* Still locked by own process. */ - return -1; - - /* Prevent problems caused by multiple threads. */ - __libc_lock_lock (lock); - - lock_fd = open (CACHELOCK, O_RDONLY|O_CREAT, 0666); - if (lock_fd == -1) - /* Cannot create lock file. */ - RETURN_CLOSE_FD (-1); - - /* Make sure file gets correctly closed when process finished. */ - flags = fcntl (lock_fd, F_GETFD, 0); - if (flags == -1) - /* Cannot get file flags. */ - RETURN_CLOSE_FD (-1); - flags |= FD_CLOEXEC; /* Close on exit. */ - if (fcntl (lock_fd, F_SETFD, flags) < 0) - /* Cannot set new flags. */ - RETURN_CLOSE_FD (-1); - - /* Now we have to get exclusive write access. Since multiple - process could try this we won't stop when it first fails. - Instead we set a timeout for the system call. Once the timer - expires it is likely that there are some problems which cannot be - resolved by waiting. - - It is important that we don't change the signal state. We must - restore the old signal behaviour. */ - memset (&new_act, '\0', sizeof (struct sigaction)); - new_act.sa_handler = noop_handler; - sigfillset (&new_act.sa_mask); - new_act.sa_flags = 0ul; - - /* Install new action handler for alarm and save old. */ - if (sigaction (SIGALRM, &new_act, &saved_act) < 0) - /* Cannot install signal handler. */ - RETURN_CLOSE_FD (-1); - - /* Now make sure the alarm signal is not blocked. */ - sigemptyset (&new_set); - sigaddset (&new_set, SIGALRM); - if (sigprocmask (SIG_UNBLOCK, &new_set, &saved_set) < 0) - RETURN_RESTORE_HANDLER (-1); - - /* Start timer. If we cannot get the lock in the specified time we - get a signal. */ - alarm (TIMEOUT); - - /* Try to get the lock. */ - memset (&fl, '\0', sizeof (struct flock)); - fl.l_type = F_RDLCK; - fl.l_whence = SEEK_SET; - result = fcntl (lock_fd, F_SETLKW, &fl); - - RETURN_CLEAR_ALARM (result); -} - - -int -__nis_unlock_cache () -{ - int result; - - if (lock_fd == -1) - /* There is no lock set. */ - result = -1; - else - { - /* Prevent problems caused by multiple threads. */ - __libc_lock_lock (lock); - - result = close (lock_fd); - - /* Mark descriptor as unused. */ - lock_fd = -1; - - /* Clear mutex. */ - __libc_lock_unlock (lock); - } - - return result; -} - - -static void -noop_handler (sig) - int sig; -{ - /* We simply return which makes the `fcntl' call return with an error. */ -} diff --git a/nis/nis_cache.c b/nis/nis_cache.c deleted file mode 100644 index e10b8c07fd..0000000000 --- a/nis/nis_cache.c +++ /dev/null @@ -1,307 +0,0 @@ -/* Copyright (C) 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Thorsten Kukuk , 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "nis_intern.h" - -static struct timeval TIMEOUT = {10, 0}; - -#define HEADER_MAGIC 0x07021971 -#define SPACER_MAGIC 0x07654321 - -#define CACHE_VERSION 0x00000001 - -struct cache_header -{ - u_long magic; /* Magic number */ - u_long vers; /* Cache file format version */ - u_short tcp_port; /* tcp port of nis_cachemgr */ - u_short udp_port; /* udp port of nis_cachemgr */ - u_long entries; /* Number of cached objs. */ - off_t used; /* How many space are used ? */ -}; -typedef struct cache_header cache_header; - -struct cache_spacer -{ - u_long magic; /* Magic number */ - u_long hashval; - time_t ctime; /* time we have created this object */ - time_t ttl; /* time to life of this object */ - off_t next_offset; -}; -typedef struct cache_spacer cache_spacer; - -static int cache_fd = -1; -static int clnt_sock; -static caddr_t maddr = NULL; -static size_t msize; -static CLIENT *cache_clnt = NULL; - -/* If there is no cachemgr, we shouldn't use NIS_SHARED_DIRCACHE, if - there is no NIS_SHARED_DIRCACHE, we couldn't use nis_cachemgr. - So, if the clnt_call to nis_cachemgr fails, we also close the cache file. - But another thread could read the cache => lock the cache_fd and cache_clnt - variables with the same lock */ -__libc_lock_define_initialized (static, mgrlock) - -/* close file handles and nis_cachemgr connection */ -static void -__cache_close (void) -{ - if (cache_fd != -1) - { - close (cache_fd); - cache_fd = -1; - } - if (cache_clnt != NULL) - { - clnt_destroy (cache_clnt); - close (clnt_sock); - cache_clnt = NULL; - } -} - -/* open the cache file and connect to nis_cachemgr */ -static bool_t -__cache_open (void) -{ - struct sockaddr_in sin; - cache_header hptr; - - if ((cache_fd = open (CACHEFILE, O_RDONLY)) == -1) - return FALSE; - - if (read (cache_fd, &hptr, sizeof (cache_header)) == -1 - || lseek (cache_fd, 0, SEEK_SET) < 0) - { - close (cache_fd); - cache_fd = -1; - return FALSE; - } - if (hptr.magic != HEADER_MAGIC) - { - close (cache_fd); - cache_fd = -1; - syslog (LOG_ERR, _("NIS+: cache file is corrupt!")); - return FALSE; - } - - memset (&sin, '\0', sizeof (sin)); - sin.sin_family = AF_INET; - clnt_sock = RPC_ANYSOCK; - sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK); - sin.sin_port = htons (hptr.tcp_port); - cache_clnt = clnttcp_create (&sin, CACHEPROG, CACHE_VER_1, &clnt_sock, 0, 0); - if (cache_clnt == NULL) - { - close (cache_fd); - cache_fd = -1; - return FALSE; - } - /* If the program exists, close the socket */ - if (fcntl (clnt_sock, F_SETFD, FD_CLOEXEC) == -1) - perror (_("fcntl: F_SETFD")); - return TRUE; -} - -/* Ask the cache manager to update directory 'name' - for us (because the ttl has expired). */ -static nis_error -__cache_refresh (nis_name name) -{ - char clnt_res = 0; - nis_error result = NIS_SUCCESS; - - __libc_lock_lock (mgrlock); - - if (cache_clnt == NULL) - result = NIS_FAIL; - else if (clnt_call (cache_clnt, NIS_CACHE_REFRESH_ENTRY, - (xdrproc_t) xdr_wrapstring, (caddr_t) &name, - (xdrproc_t) xdr_void, &clnt_res, TIMEOUT) - != RPC_SUCCESS) - { - __cache_close (); - result = NIS_FAIL; - } - - __libc_lock_unlock (mgrlock); - - return result; -} - -static nis_error -__cache_find (const_nis_name name, directory_obj **obj) -{ - unsigned long hash; - struct cache_header *hptr; - struct cache_spacer *cs; - struct directory_obj *dir; - XDR xdrs; - caddr_t addr, ptr; - time_t now = time (NULL); - - if (maddr == NULL) - return NIS_FAIL; - - hash = __nis_hash (name, strlen(name)); - hptr = (cache_header *)maddr; - if ((hptr->magic != HEADER_MAGIC) || (hptr->vers != CACHE_VERSION)) - { - syslog (LOG_ERR, _("NIS+: cache file is corrupt!")); - return NIS_SYSTEMERROR; - } - cs = (cache_spacer *)(maddr + sizeof (cache_header)); - while (cs->next_offset) - { - if (cs->magic != SPACER_MAGIC) - { - syslog (LOG_ERR, _("NIS+: cache file is corrupt!")); - return NIS_SYSTEMERROR; - } - if (cs->hashval == hash) - { - if ((now - cs->ctime) > cs->ttl) - return NIS_CACHEEXPIRED; - dir = calloc (1, sizeof (directory_obj)); - addr = (caddr_t)cs + sizeof (cache_spacer); - xdrmem_create (&xdrs, addr, cs->next_offset, XDR_DECODE); - xdr_directory_obj (&xdrs, dir); - xdr_destroy (&xdrs); - *obj = dir; - return NIS_SUCCESS; - } - ptr = (caddr_t)cs; - ptr += cs->next_offset + sizeof (struct cache_spacer); - cs = (struct cache_spacer *)ptr; - } - return NIS_NOTFOUND; -} - -static directory_obj * -internal_cache_search (const_nis_name name) -{ - directory_obj *dir; - nis_error res; - int second_refresh = 0; - struct stat s; - - if (cache_fd == -1) - if (__cache_open () == FALSE) - return NULL; - - again: - /* This lock is for nis_cachemgr, so it couldn't write a new cache - file if we reading it */ - if (__nis_lock_cache () == -1) - return NULL; - - if (maddr != NULL) - munmap (maddr, msize); - if (fstat (cache_fd, &s) < 0) - maddr = MAP_FAILED; - else - { - msize = s.st_size; - maddr = mmap (0, msize, PROT_READ, MAP_SHARED, cache_fd, 0); - } - if (maddr == MAP_FAILED) - { - __nis_unlock_cache (); - return NULL; - } - - res = __cache_find (name, &dir); - - munmap (maddr, msize); - maddr = NULL; - /* Allow nis_cachemgr to write a new cachefile */ - __nis_unlock_cache (); - - switch(res) - { - case NIS_CACHEEXPIRED: - if (second_refresh) - { - __cache_close (); - syslog (LOG_WARNING, - _("NIS+: nis_cachemgr failed to refresh object for us")); - return NULL; - } - ++second_refresh; - if (__cache_refresh ((char *) name) != NIS_SUCCESS) - return NULL; - goto again; - break; - case NIS_SUCCESS: - return dir; - default: - return NULL; - } -} - -directory_obj * -__cache_search (const_nis_name name) -{ - directory_obj *dir; - - __libc_lock_lock (mgrlock); - - dir = internal_cache_search (name); - - __libc_lock_unlock (mgrlock); - - return dir; -} - -nis_error -__cache_add (fd_result *fd) -{ - char clnt_res = 0; - nis_error result = NIS_SUCCESS; - - __libc_lock_lock (mgrlock); - - if (cache_clnt == NULL) - if (__cache_open () == FALSE) - result = NIS_FAIL; - - if (cache_clnt != NULL && - (clnt_call (cache_clnt, NIS_CACHE_ADD_ENTRY, (xdrproc_t) xdr_fd_result, - (caddr_t)fd, (xdrproc_t) xdr_void, &clnt_res, TIMEOUT) - != RPC_SUCCESS)) - { - __cache_close (); - result = NIS_RPCERROR; - } - - __libc_lock_unlock (mgrlock); - - return result; -} -- 2.11.0