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/*
* Status buffer routines for the CUPS scheduler.
*
* Copyright 2007-2014 by Apple Inc.
* Copyright 1997-2006 by Easy Software Products, all rights reserved.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more information.
*/
/*
* Include necessary headers...
*/
#include "cupsd.h"
#include <stdarg.h>
/*
* 'cupsdStatBufDelete()' - Destroy a status buffer.
*/
void
cupsdStatBufDelete(cupsd_statbuf_t *sb) /* I - Status buffer */
{
/*
* Range check input...
*/
if (!sb)
return;
/*
* Close the status pipe and free memory used...
*/
close(sb->fd);
free(sb);
}
/*
* 'cupsdStatBufNew()' - Create a new status buffer.
*/
cupsd_statbuf_t * /* O - New status buffer */
cupsdStatBufNew(int fd, /* I - File descriptor of pipe */
const char *prefix, /* I - Printf-style prefix string */
...) /* I - Additional args as needed */
{
cupsd_statbuf_t *sb; /* New status buffer */
va_list ap; /* Argument list */
/*
* Range check input...
*/
if (fd < 0)
return (NULL);
/*
* Allocate the status buffer...
*/
if ((sb = calloc(1, sizeof(cupsd_statbuf_t))) != NULL)
{
/*
* Assign the file descriptor...
*/
sb->fd = fd;
/*
* Format the prefix string, if any. This is usually "[Job 123]"
* or "[Sub 123]", and so forth.
*/
if (prefix)
{
/*
* Printf-style prefix string...
*/
va_start(ap, prefix);
vsnprintf(sb->prefix, sizeof(sb->prefix), prefix, ap);
va_end(ap);
}
else
{
/*
* No prefix string...
*/
sb->prefix[0] = '\0';
}
}
return (sb);
}
/*
* 'cupsdStatBufUpdate()' - Update the status buffer.
*/
char * /* O - Line from buffer, "", or NULL */
cupsdStatBufUpdate(
cupsd_statbuf_t *sb, /* I - Status buffer */
int *loglevel, /* O - Log level */
char *line, /* I - Line buffer */
int linelen) /* I - Size of line buffer */
{
int bytes; /* Number of bytes read */
char *lineptr, /* Pointer to end of line in buffer */
*message; /* Pointer to message text */
/*
* Check if the buffer already contains a full line...
*/
if ((lineptr = strchr(sb->buffer, '\n')) == NULL)
{
/*
* No, read more data...
*/
if ((bytes = read(sb->fd, sb->buffer + sb->bufused, (size_t)(CUPSD_SB_BUFFER_SIZE - sb->bufused - 1))) > 0)
{
sb->bufused += bytes;
sb->buffer[sb->bufused] = '\0';
/*
* Guard against a line longer than the max buffer size...
*/
if ((lineptr = strchr(sb->buffer, '\n')) == NULL &&
sb->bufused == (CUPSD_SB_BUFFER_SIZE - 1))
lineptr = sb->buffer + sb->bufused;
}
else if (bytes < 0 && errno == EINTR)
{
/*
* Return an empty line if we are interrupted...
*/
*loglevel = CUPSD_LOG_NONE;
line[0] = '\0';
return (line);
}
else
{
/*
* End-of-file, so use the whole buffer...
*/
lineptr = sb->buffer + sb->bufused;
*lineptr = '\0';
}
/*
* Final check for end-of-file...
*/
if (sb->bufused == 0 && bytes == 0)
lineptr = NULL;
}
if (!lineptr)
{
/*
* End of file...
*/
*loglevel = CUPSD_LOG_NONE;
line[0] = '\0';
return (NULL);
}
/*
* Terminate the line and process it...
*/
*lineptr++ = '\0';
/*
* Figure out the logging level...
*/
if (!strncmp(sb->buffer, "EMERG:", 6))
{
*loglevel = CUPSD_LOG_EMERG;
message = sb->buffer + 6;
}
else if (!strncmp(sb->buffer, "ALERT:", 6))
{
*loglevel = CUPSD_LOG_ALERT;
message = sb->buffer + 6;
}
else if (!strncmp(sb->buffer, "CRIT:", 5))
{
*loglevel = CUPSD_LOG_CRIT;
message = sb->buffer + 5;
}
else if (!strncmp(sb->buffer, "ERROR:", 6))
{
*loglevel = CUPSD_LOG_ERROR;
message = sb->buffer + 6;
}
else if (!strncmp(sb->buffer, "WARNING:", 8))
{
*loglevel = CUPSD_LOG_WARN;
message = sb->buffer + 8;
}
else if (!strncmp(sb->buffer, "NOTICE:", 7))
{
*loglevel = CUPSD_LOG_NOTICE;
message = sb->buffer + 7;
}
else if (!strncmp(sb->buffer, "INFO:", 5))
{
*loglevel = CUPSD_LOG_INFO;
message = sb->buffer + 5;
}
else if (!strncmp(sb->buffer, "DEBUG:", 6))
{
*loglevel = CUPSD_LOG_DEBUG;
message = sb->buffer + 6;
}
else if (!strncmp(sb->buffer, "DEBUG2:", 7))
{
*loglevel = CUPSD_LOG_DEBUG2;
message = sb->buffer + 7;
}
else if (!strncmp(sb->buffer, "PAGE:", 5))
{
*loglevel = CUPSD_LOG_PAGE;
message = sb->buffer + 5;
}
else if (!strncmp(sb->buffer, "STATE:", 6))
{
*loglevel = CUPSD_LOG_STATE;
message = sb->buffer + 6;
}
else if (!strncmp(sb->buffer, "JOBSTATE:", 9))
{
*loglevel = CUPSD_LOG_JOBSTATE;
message = sb->buffer + 9;
}
else if (!strncmp(sb->buffer, "ATTR:", 5))
{
*loglevel = CUPSD_LOG_ATTR;
message = sb->buffer + 5;
}
else if (!strncmp(sb->buffer, "PPD:", 4))
{
*loglevel = CUPSD_LOG_PPD;
message = sb->buffer + 4;
}
else
{
*loglevel = CUPSD_LOG_DEBUG;
message = sb->buffer;
}
/*
* Skip leading whitespace in the message...
*/
while (isspace(*message & 255))
message ++;
/*
* Send it to the log file as needed...
*/
if (sb->prefix[0])
{
if (*loglevel > CUPSD_LOG_NONE &&
(*loglevel != CUPSD_LOG_INFO || LogLevel >= CUPSD_LOG_DEBUG))
{
/*
* General status message; send it to the error_log file...
*/
if (message[0] == '[')
cupsdLogMessage(*loglevel, "%s", message);
else
cupsdLogMessage(*loglevel, "%s %s", sb->prefix, message);
}
else if (*loglevel < CUPSD_LOG_NONE && LogLevel >= CUPSD_LOG_DEBUG)
cupsdLogMessage(CUPSD_LOG_DEBUG2, "%s %s", sb->prefix, sb->buffer);
}
/*
* Copy the message to the line buffer...
*/
strlcpy(line, message, (size_t)linelen);
/*
* Copy over the buffer data we've used up...
*/
if (lineptr < sb->buffer + sb->bufused)
_cups_strcpy(sb->buffer, lineptr);
sb->bufused -= lineptr - sb->buffer;
if (sb->bufused < 0)
sb->bufused = 0;
return (line);
}
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