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Update locking codes.

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This commit is contained in:
Kurt Zeilenga 1999-03-26 17:43:23 +00:00
parent 918b9f8d86
commit 11add79cb1
3 changed files with 40 additions and 35 deletions
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47
include/ac/unistd.h
View file

@ -52,27 +52,42 @@ extern char* getpass LDAP_P((const char *getpass));
extern char *mktemp(char *);
#endif
/* use _POSIX_VERSION for POSIX.1 code */
/* Setup file locking macros */
#if defined (HAVE_LOCKF) && defined (F_LOCK) && defined (F_ULOCK)
# define ldap_lockf(x) lockf(fileno(x),F_LOCK, 0)
# define ldap_unlockf(x) lockf(fileno(x),F_ULOCK, 0)
#elif defined (HAVE_FCNTL_H) && defined (F_WRLCK) && defined (F_UNLCK)
# ifndef NEED_FCNTL_LOCKING
# define NEED_FCNTL_LOCKING
#if !defined( ldap_lockf ) && HAVE_LOCKF && defined( F_LOCK )
# define ldap_lockf(x) lockf(fileno(x), F_LOCK, 0)
# define ldap_unlockf(x) lockf(fileno(x), F_ULOCK, 0)
#endif
#if !defined( ldap_lockf ) && HAVE_FCNTL
# ifdef HAVE_FCNTL_H
# include <fcntl.h>
# endif
# include <lutil_lockf.h>
# define ldap_lockf(x) lutil_ldap_lockf(x)
# define ldap_unlockf(x) lutil_ldap_unlockf(x)
#elif defined (HAVE_FLOCK) && defined (LOCK_EX) && defined (LOCK_UN)
# ifdef F_WRLCK
# ifndef NEED_FCNTL_LOCKING
# define NEED_FCNTL_LOCKING
# endif
# include <lutil_lockf.h>
# define ldap_lockf(x) lutil_lockf(x)
# define ldap_unlockf(x) lutil_unlockf(x)
# endif
#endif
#if !defined( ldap_lockf ) && HAVE_FLOCK
# if HAVE_SYS_FILE_H
# include <sys/file.h>
# endif
# define ldap_lockf(x) flock(fileno(x),LOCK_EX)
# define ldap_unlockf(x) flock(fileno(x),LOCK_UN)
#else
#error no_suitable_locking_found
# ifdef LOCK_EX
# define ldap_lockf(x) flock(fileno(x), LOCK_EX)
# define ldap_unlockf(x) flock(fileno(x), LOCK_UN)
# endif
#endif
#if !defined( ldap_lockf )
/* use some simplistic locking method */
# include <lutil_lockf.h>
# define ldap_lockf(x) lutil_lockf(x)
# define ldap_unlockf(x) lutil_unlockf(x)
#endif
#endif /* _AC_UNISTD_H */

16
include/lutil_lockf.h
View file

@ -7,26 +7,18 @@
* license is available at http://www.OpenLDAP.org/license.html or
* in file LICENSE in the top-level directory of the distribution.
*/
/* File locking methods */
/* only available if fcntl() locking is required */
#ifndef _LUTIL_LOCKF_H_
#define _LUTIL_LOCKF_H_
#include <stdio.h>
#include <ldap_cdefs.h>
#include <ac/bytes.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef NEED_FCNTL_LOCKING
LDAP_BEGIN_DECL
LDAP_F int lutil_ldap_lockf LDAP_P(( FILE *fs ));
LDAP_F int lutil_ldap_unlockf LDAP_P(( FILE *fs ));
LDAP_F int lutil_lockf LDAP_P(( FILE *fs ));
LDAP_F int lutil_unlockf LDAP_P(( FILE *fs ));
LDAP_END_DECL
#endif /* NEED_FCNTL_LOCKING */
#endif /* _LUTIL_LOCKF_H_ */

12
libraries/liblutil/lockf.c
View file

@ -14,28 +14,26 @@
#include <stdio.h>
#include <ac/unistd.h>
#if defined(NEED_FCNTL_LOCKING) && defined(HAVE_FCNTL_H)
#if defined(NEED_FCNTL_LOCKING)
#include <fcntl.h>
int lutil_ldap_lockf ( FILE *fs ) {
int lutil_lockf ( FILE *fp ) {
struct flock file_lock;
memset( &file_lock, 0, sizeof( file_lock ) );
file_lock.l_type = F_WRLCK;
file_lock.l_whence = SEEK_SET;
file_lock.l_start = 0;
file_lock.l_len = 0;
return( fcntl( fileno( fs ), F_SETLKW, &file_lock ) );
return( fcntl( fileno(fp), F_SETLKW, &file_lock ) );
}
int lutil_ldap_unlockf ( FILE *fs ) {
int lutil_unlockf ( FILE *fp ) {
struct flock file_lock;
memset( &file_lock, 0, sizeof( file_lock ) );
file_lock.l_type = F_UNLCK;
file_lock.l_whence = SEEK_SET;
file_lock.l_start = 0;
file_lock.l_len = 0;
return ( fcntl( fileno( fs ), F_SETLK, &file_lock ) );
return ( fcntl( fileno(fp), F_SETLK, &file_lock ) );
}
#endif /* !HAVE_FILE_LOCKING */