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/*
* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*/
#include <sm/gen.h>
SM_RCSID("@(#)$Id: syslogio.c,v 1.29 2001/09/11 04:04:49 gshapiro Exp $")
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <syslog.h>
#include <errno.h>
#ifdef SM_RPOOL
# include <sm/rpool.h>
#endif /* SM_RPOOL */
#include <sm/io.h>
#include "local.h"
/*
** Overall:
** This is a output file type that copies its output to the syslog daemon.
** Each line of output is written as a separate syslog message.
** The client is responsible for calling openlog() before writing to
** any syslog file, and calling closelog() after all syslog output is complete.
** The only state associated with a syslog file is 'int priority',
** which we store in fp->f_ival.
*/
/*
** SM_SYSLOGOPEN -- open a file pointer to syslog
**
** Parameters:
** fp -- file pointer assigned for the open
** info -- priority level of the syslog messages
** flags -- not used
** rpool -- ignored
**
** Returns:
** 0 (zero) success always (see Overall)
*/
int
sm_syslogopen(fp, info, flags, rpool)
SM_FILE_T *fp;
const void *info;
int flags;
const void *rpool;
{
int *priority = (int *)info;
fp->f_ival = *priority;
return 0;
}
/*
** SM_SYSLOGREAD -- read function for syslog
**
** This is a "stub" function (placeholder) that always returns an error.
** It is an error to read syslog.
**
** Parameters:
** fp -- the file pointer
** buf -- buffer to place the data read
** n -- number of bytes to read
**
** Returns:
** -1 (error) always and sets errno
*/
ssize_t
sm_syslogread(fp, buf, n)
SM_FILE_T *fp;
char *buf;
size_t n;
{
/* an error to read */
errno = ENODEV;
return -1;
}
/*
** SM_SYSLOGWRITE -- write function for syslog
**
** Send output to syslog.
**
** Parameters:
** fp -- the file pointer
** buf -- buffer that the write data comes from
** n -- number of bytes to write
**
** Returns:
** 0 (zero) for success always
*/
/*
** XXX TODO: more work needs to be done to ensure that each line of output
** XXX written to a syslog file is mapped to exactly one syslog message.
*/
ssize_t
sm_syslogwrite(fp, buf, n)
SM_FILE_T *fp;
char const *buf;
size_t n;
{
syslog(fp->f_ival, "%s", buf);
return 0;
}
/*
** SM_SYSLOGSEEK -- position the syslog file offset
**
** This is a "stub" function (placeholder) that always returns an error.
** It is an error to seek syslog.
**
** Parameters:
** fp -- the file pointer
** offset -- the new offset position relative to 'whence'
** whence -- flag indicating start of 'offset'
**
** Returns:
** -1 (error) always.
*/
off_t
sm_syslogseek(fp, offset, whence)
SM_FILE_T *fp;
off_t offset;
int whence;
{
errno = ENODEV;
return -1;
}
/*
** SM_SYSLOGCLOSE -- close the syslog file pointer
**
** Parameters:
** fp -- the file pointer
**
** Returns:
** 0 (zero) success always (see Overall)
**
*/
int
sm_syslogclose(fp)
SM_FILE_T *fp;
{
return 0;
}
/*
** SM_SYSLOGSETINFO -- set information for the file pointer
**
** Parameters:
** fp -- the file pointer being set
** what -- what information is being set
** valp -- information content being set to
**
** Returns:
** -1 on failure
** 0 (zero) on success
**
** Side Effects:
** Sets internal file pointer data
*/
int
sm_syslogsetinfo(fp, what, valp)
SM_FILE_T *fp;
int what;
void *valp;
{
switch (what)
{
case SM_IO_SL_PRIO:
fp->f_ival = *((int *)(valp));
return 0;
default:
errno = EINVAL;
return -1;
}
}
/*
** SM_SYSLOGGETINFO -- get information relating to the file pointer
**
** Parameters:
** fp -- the file pointer being queried
** what -- the information type being queried
** valp -- location to placed queried information
**
** Returns:
** 0 (zero) on success
** -1 on failure
**
** Side Effects:
** Fills in 'valp' with data.
*/
int
sm_sysloggetinfo(fp, what, valp)
SM_FILE_T *fp;
int what;
void *valp;
{
switch (what)
{
case SM_IO_SL_PRIO:
*((int *)(valp)) = fp->f_ival;
return 0;
default:
errno = EINVAL;
return -1;
}
}
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