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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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Db_WriteEntry.c,v
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1989-06-16
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232 lines
head 1.5;
branch ;
access ;
symbols ;
locks ; strict;
comment @ * @;
1.5
date 89.06.15.22.45.33; author douglis; state Exp;
branches ;
next 1.4;
1.4
date 89.01.13.11.44.35; author douglis; state Exp;
branches ;
next 1.3;
1.3
date 88.09.22.22.12.15; author douglis; state Exp;
branches ;
next 1.2;
1.2
date 88.09.13.16.49.39; author douglis; state Exp;
branches ;
next 1.1;
1.1
date 88.08.14.15.09.14; author douglis; state Exp;
branches ;
next ;
desc
@Procedure to open and lock a database file, write a record, and close it
again.
@
1.5
log
@create database file if not already there
@
text
@/*
* Db_WriteEntry.c --
*
* Source code for the Db_WriteEntry procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/db/RCS/Db_WriteEntry.c,v 1.4 89/01/13 11:44:35 douglis Exp Locker: douglis $ SPRITE (Berkeley)";
#endif not lint
#include <db.h>
#include "dbInt.h"
/*
*----------------------------------------------------------------------
*
* Db_WriteEntry --
*
* Write a buffer into a specified location in the shared database.
* This opens and locks the file, writes the data, and closes the
* file. The lock is polled if necessary. The file is opened with
* the default mode as defined above.
*
* Results:
* -1 indicates an error, in which case errno indicates more details.
* 0 indicates success.
*
* Side effects:
* The global database is modified.
*
*----------------------------------------------------------------------
*/
int
Db_WriteEntry(file, buffer, index, size, lockHow)
char *file;
char *buffer;
int index;
int size;
Db_LockHow lockHow;
{
int status;
int offset;
int streamID;
int bytesWritten;
Db_Handle handle;
#ifdef DEBUG_DB
syslog(LOG_INFO, "Debug msg: Db_WriteEntry(%s) called.", file);
#endif
streamID = open(file, O_WRONLY | O_CREAT, FILE_MODE);
if (streamID == -1) {
syslog(LOG_ERR, "Db_WriteEntry: error opening file %s: %s.\n", file,
strerror(errno));
return(streamID);
}
offset = index * size;
status = lseek(streamID, (long) offset, L_SET);
if (status == -1) {
return(status);
}
/*
* Fake a Db_Handle for DbLockDesc.
*/
handle.streamID = streamID;
handle.lockHow = lockHow;
handle.lockType = LOCK_EX;
#ifndef CLEAN
handle.fileName = file;
#endif /* CLEAN */
status = DbLockDesc(&handle);
if (status == -1) {
#ifdef DEBUG_DB
syslog(LOG_INFO, "Debug msg: Db_WriteEntry(%s) returning %x.", file, status);
#endif
return(status);
}
bytesWritten = write(streamID, buffer, size);
if (bytesWritten == -1) {
status = -1;
} else if (bytesWritten != size) {
status = -1;
errno = 0;
} else {
status = 0;
}
(void) flock(streamID, LOCK_EX | LOCK_UN);
(void) close(streamID);
#ifdef DEBUG_DB
syslog(LOG_INFO, "Debug msg: Db_WriteEntry(%s) returning %x.", file, status);
#endif
return(status);
}
@
1.4
log
@changed for buffering and for new arg passing to lock routine.
[generic checkin msg].
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: /sprite/src/lib/c/db/RCS/Db_WriteEntry.c,v 1.3 88/09/22 22:12:15 douglis Exp Locker: douglis $ SPRITE (Berkeley)";
d59 4
a62 1
streamID = open(file, O_WRONLY, FILE_MODE);
d64 2
d85 3
d103 3
@
1.3
log
@Changed some arg. orders, var. names, and Db_LockDesc to DbLockDesc.
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: Db_WriteEntry.c,v 1.2 88/09/13 16:49:39 douglis Exp $ SPRITE (Berkeley)";
d57 1
d69 10
a78 1
status = DbLockDesc(streamID, LOCK_EX, lockHow);
@
1.2
log
@fixed some lint.
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: Db_WriteEntry.c,v 1.1 88/08/14 15:09:14 douglis Exp $ SPRITE (Berkeley)";
d46 1
a46 1
Db_WriteEntry(file, index, bufSize, buf, lockHow)
d48 1
d50 1
a50 2
int bufSize;
char *buf;
d63 1
a63 1
offset = index * bufSize;
d68 1
a68 1
status = Db_LockDesc(streamID, LOCK_EX, lockHow);
d73 1
a73 1
bytesWritten = write(streamID, buf, bufSize);
d76 1
a76 1
} else if (bytesWritten != bufSize) {
@
1.1
log
@Initial revision
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: proto.c,v 1.2 88/03/11 08:39:08 ouster Exp $ SPRITE (Berkeley)";
d64 1
a64 1
status = lseek(streamID, offset, L_SET);
@