80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997,2008 Oracle. All rights reserved.
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*
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* $Id: os_qnx_open.c 63573 2008-05-23 21:43:21Z trent.nelson $
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*/
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#include "db_config.h"
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#include "db_int.h"
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/*
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* __os_qnx_region_open --
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* Open a shared memory region file using POSIX shm_open.
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*
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* PUBLIC: #ifdef HAVE_QNX
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* PUBLIC: int __os_qnx_region_open
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* PUBLIC: __P((ENV *, const char *, int, int, DB_FH **));
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* PUBLIC: #endif
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*/
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int
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__os_qnx_region_open(env, name, oflags, mode, fhpp)
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ENV *env;
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const char *name;
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int oflags, mode;
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DB_FH **fhpp;
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{
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DB_FH *fhp;
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int fcntl_flags;
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int ret;
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/*
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* Allocate the file handle and copy the file name. We generally only
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* use the name for verbose or error messages, but on systems where we
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* can't unlink temporary files immediately, we use the name to unlink
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* the temporary file when the file handle is closed.
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*
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* Lock the ENV handle and insert the new file handle on the list.
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*/
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if ((ret = __os_calloc(env, 1, sizeof(DB_FH), &fhp)) != 0)
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return (ret);
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if ((ret = __os_strdup(env, name, &fhp->name)) != 0)
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goto err;
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if (env != NULL) {
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MUTEX_LOCK(env, env->mtx_env);
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TAILQ_INSERT_TAIL(&env->fdlist, fhp, q);
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MUTEX_UNLOCK(env, env->mtx_env);
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F_SET(fhp, DB_FH_ENVLINK);
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}
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/*
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* Once we have created the object, we don't need the name
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* anymore. Other callers of this will convert themselves.
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*/
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if ((fhp->fd = shm_open(name, oflags, mode)) == -1) {
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ret = __os_posix_err(__os_get_syserr());
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err: (void)__os_closehandle(env, fhp);
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return (ret);
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}
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F_SET(fhp, DB_FH_OPENED);
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#ifdef HAVE_FCNTL_F_SETFD
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/* Deny file descriptor access to any child process. */
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if ((fcntl_flags = fcntl(fhp->fd, F_GETFD)) == -1 ||
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fcntl(fhp->fd, F_SETFD, fcntl_flags | FD_CLOEXEC) == -1) {
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ret = __os_get_syserr();
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__db_syserr(env, ret, "fcntl(F_SETFD)");
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(void)__os_closehandle(env, fhp);
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return (__os_posix_err(ret));
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}
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#else
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COMPQUIET(fcntl_flags, 0);
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#endif
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F_SET(fhp, DB_FH_OPENED);
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*fhpp = fhp;
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return (0);
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}
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