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cups/filter/commandtops.c

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/*
* PostScript command filter for CUPS.
*
* Copyright 2008-2014 by Apple Inc.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more information.
*/
/*
* Include necessary headers...
*/
#include <cups/cups-private.h>
#include <cups/ppd.h>
#include <cups/sidechannel.h>
/*
* Local functions...
*/
static int auto_configure(ppd_file_t *ppd, const char *user);
static void begin_ps(ppd_file_t *ppd, const char *user);
static void end_ps(ppd_file_t *ppd);
static void print_self_test_page(ppd_file_t *ppd, const char *user);
static void report_levels(ppd_file_t *ppd, const char *user);
/*
* 'main()' - Process a CUPS command file.
*/
int /* O - Exit status */
main(int argc, /* I - Number of command-line arguments */
char *argv[]) /* I - Command-line arguments */
{
int status = 0; /* Exit status */
cups_file_t *fp; /* Command file */
char line[1024], /* Line from file */
*value; /* Value on line */
int linenum; /* Line number in file */
ppd_file_t *ppd; /* PPD file */
/*
* Check for valid arguments...
*/
if (argc < 6 || argc > 7)
{
/*
* We don't have the correct number of arguments; write an error message
* and return.
*/
_cupsLangPrintf(stderr,
_("Usage: %s job-id user title copies options [file]"),
argv[0]);
return (1);
}
/*
* Open the PPD file...
*/
if ((ppd = ppdOpenFile(getenv("PPD"))) == NULL)
{
fputs("ERROR: Unable to open PPD file!\n", stderr);
return (1);
}
/*
* Open the command file as needed...
*/
if (argc == 7)
{
if ((fp = cupsFileOpen(argv[6], "r")) == NULL)
{
perror("ERROR: Unable to open command file - ");
return (1);
}
}
else
fp = cupsFileStdin();
/*
* Read the commands from the file and send the appropriate commands...
*/
linenum = 0;
while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))
{
/*
* Parse the command...
*/
if (!_cups_strcasecmp(line, "AutoConfigure"))
status |= auto_configure(ppd, argv[2]);
else if (!_cups_strcasecmp(line, "PrintSelfTestPage"))
print_self_test_page(ppd, argv[2]);
else if (!_cups_strcasecmp(line, "ReportLevels"))
report_levels(ppd, argv[2]);
else
{
_cupsLangPrintFilter(stderr, "ERROR",
_("Invalid printer command \"%s\"."), line);
status = 1;
}
}
return (status);
}
/*
* 'auto_configure()' - Automatically configure the printer using PostScript
* query commands and/or SNMP lookups.
*/
static int /* O - Exit status */
auto_configure(ppd_file_t *ppd, /* I - PPD file */
const char *user) /* I - Printing user */
{
int status = 0; /* Exit status */
ppd_option_t *option; /* Current option in PPD */
ppd_attr_t *attr; /* Query command attribute */
const char *valptr; /* Pointer into attribute value */
char buffer[1024], /* String buffer */
*bufptr; /* Pointer into buffer */
ssize_t bytes; /* Number of bytes read */
int datalen; /* Side-channel data length */
/*
* See if the backend supports bidirectional I/O...
*/
datalen = 1;
if (cupsSideChannelDoRequest(CUPS_SC_CMD_GET_BIDI, buffer, &datalen,
30.0) != CUPS_SC_STATUS_OK ||
buffer[0] != CUPS_SC_BIDI_SUPPORTED)
{
fputs("DEBUG: Unable to auto-configure PostScript Printer - no "
"bidirectional I/O available!\n", stderr);
return (1);
}
/*
* Put the printer in PostScript mode...
*/
begin_ps(ppd, user);
/*
* (STR #4028)
*
* As a lot of PPDs contain bad PostScript query code, we need to prevent one
* bad query sequence from affecting all auto-configuration. The following
* error handler allows us to log PostScript errors to cupsd.
*/
puts("/cups_handleerror {\n"
" $error /newerror false put\n"
" (:PostScript error in \") print cups_query_keyword print (\": ) "
"print\n"
" $error /errorname get 128 string cvs print\n"
" (; offending command:) print $error /command get 128 string cvs "
"print (\n) print flush\n"
"} bind def\n"
"errordict /timeout {} put\n"
"/cups_query_keyword (?Unknown) def\n");
fflush(stdout);
/*
* Wait for the printer to become connected...
*/
do
{
sleep(1);
datalen = 1;
}
while (cupsSideChannelDoRequest(CUPS_SC_CMD_GET_CONNECTED, buffer, &datalen,
5.0) == CUPS_SC_STATUS_OK && !buffer[0]);
/*
* Then loop through every option in the PPD file and ask for the current
* value...
*/
fputs("DEBUG: Auto-configuring PostScript printer...\n", stderr);
for (option = ppdFirstOption(ppd); option; option = ppdNextOption(ppd))
{
/*
* See if we have a query command for this option...
*/
snprintf(buffer, sizeof(buffer), "?%s", option->keyword);
if ((attr = ppdFindAttr(ppd, buffer, NULL)) == NULL || !attr->value)
{
fprintf(stderr, "DEBUG: Skipping %s option...\n", option->keyword);
continue;
}
/*
* Send the query code to the printer...
*/
fprintf(stderr, "DEBUG: Querying %s...\n", option->keyword);
for (bufptr = buffer, valptr = attr->value; *valptr; valptr ++)
{
/*
* Log the query code, breaking at newlines...
*/
if (*valptr == '\n')
{
*bufptr = '\0';
fprintf(stderr, "DEBUG: %s\\n\n", buffer);
bufptr = buffer;
}
else if (*valptr < ' ')
{
if (bufptr >= (buffer + sizeof(buffer) - 4))
{
*bufptr = '\0';
fprintf(stderr, "DEBUG: %s\n", buffer);
bufptr = buffer;
}
if (*valptr == '\r')
{
*bufptr++ = '\\';
*bufptr++ = 'r';
}
else if (*valptr == '\t')
{
*bufptr++ = '\\';
*bufptr++ = 't';
}
else
{
*bufptr++ = '\\';
*bufptr++ = '0' + ((*valptr / 64) & 7);
*bufptr++ = '0' + ((*valptr / 8) & 7);
*bufptr++ = '0' + (*valptr & 7);
}
}
else
{
if (bufptr >= (buffer + sizeof(buffer) - 1))
{
*bufptr = '\0';
fprintf(stderr, "DEBUG: %s\n", buffer);
bufptr = buffer;
}
*bufptr++ = *valptr;
}
}
if (bufptr > buffer)
{
*bufptr = '\0';
fprintf(stderr, "DEBUG: %s\n", buffer);
}
printf("/cups_query_keyword (?%s) def\n", option->keyword);
/* Set keyword for error reporting */
fputs("{ (", stdout);
for (valptr = attr->value; *valptr; valptr ++)
{
if (*valptr == '(' || *valptr == ')' || *valptr == '\\')
putchar('\\');
putchar(*valptr);
}
fputs(") cvx exec } stopped { cups_handleerror } if clear\n", stdout);
/* Send query code */
fflush(stdout);
datalen = 0;
cupsSideChannelDoRequest(CUPS_SC_CMD_DRAIN_OUTPUT, buffer, &datalen, 5.0);
/*
* Read the response data...
*/
bufptr = buffer;
buffer[0] = '\0';
while ((bytes = cupsBackChannelRead(bufptr, sizeof(buffer) - (size_t)(bufptr - buffer) - 1, 10.0)) > 0)
{
/*
* No newline at the end? Go on reading ...
*/
bufptr += bytes;
*bufptr = '\0';
if (bytes == 0 ||
(bufptr > buffer && bufptr[-1] != '\r' && bufptr[-1] != '\n'))
continue;
/*
* Trim whitespace and control characters from both ends...
*/
bytes = bufptr - buffer;
for (bufptr --; bufptr >= buffer; bufptr --)
if (isspace(*bufptr & 255) || iscntrl(*bufptr & 255))
*bufptr = '\0';
else
break;
for (bufptr = buffer; isspace(*bufptr & 255) || iscntrl(*bufptr & 255);
bufptr ++);
if (bufptr > buffer)
{
_cups_strcpy(buffer, bufptr);
bufptr = buffer;
}
fprintf(stderr, "DEBUG: Got %d bytes.\n", (int)bytes);
/*
* Skip blank lines...
*/
if (!buffer[0])
continue;
/*
* Check the response...
*/
if ((bufptr = strchr(buffer, ':')) != NULL)
{
/*
* PostScript code for this option in the PPD is broken; show the
* interpreter's error message that came back...
*/
fprintf(stderr, "DEBUG%s\n", bufptr);
break;
}
/*
* Verify the result is a valid option choice...
*/
if (!ppdFindChoice(option, buffer))
{
if (!strcasecmp(buffer, "Unknown"))
break;
bufptr = buffer;
buffer[0] = '\0';
continue;
}
/*
* Write out the result and move on to the next option...
*/
fprintf(stderr, "PPD: Default%s=%s\n", option->keyword, buffer);
break;
}
/*
* Printer did not answer this option's query
*/
if (bytes <= 0)
{
fprintf(stderr,
"DEBUG: No answer to query for option %s within 10 seconds.\n",
option->keyword);
status = 1;
}
}
/*
* Finish the job...
*/
fflush(stdout);
end_ps(ppd);
/*
* Return...
*/
if (status)
_cupsLangPrintFilter(stderr, "WARNING",
_("Unable to configure printer options."));
return (0);
}
/*
* 'begin_ps()' - Send the standard PostScript prolog.
*/
static void
begin_ps(ppd_file_t *ppd, /* I - PPD file */
const char *user) /* I - Username */
{
(void)user;
if (ppd->jcl_begin)
{
fputs(ppd->jcl_begin, stdout);
fputs(ppd->jcl_ps, stdout);
}
puts("%!");
puts("userdict dup(\\004)cvn{}put (\\004\\004)cvn{}put\n");
fflush(stdout);
}
/*
* 'end_ps()' - Send the standard PostScript trailer.
*/
static void
end_ps(ppd_file_t *ppd) /* I - PPD file */
{
if (ppd->jcl_end)
fputs(ppd->jcl_end, stdout);
else
putchar(0x04);
fflush(stdout);
}
/*
* 'print_self_test_page()' - Print a self-test page.
*/
static void
print_self_test_page(ppd_file_t *ppd, /* I - PPD file */
const char *user) /* I - Printing user */
{
/*
* Put the printer in PostScript mode...
*/
begin_ps(ppd, user);
/*
* Send a simple file the draws a box around the imageable area and shows
* the product/interpreter information...
*/
puts("\r%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
"%%%%%%%%%%%%%\n"
"\r%%%% If you can read this, you are using the wrong driver for your "
"printer. %%%%\n"
"\r%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
"%%%%%%%%%%%%%\n"
"0 setgray\n"
"2 setlinewidth\n"
"initclip newpath clippath gsave stroke grestore pathbbox\n"
"exch pop exch pop exch 9 add exch 9 sub moveto\n"
"/Courier findfont 12 scalefont setfont\n"
"0 -12 rmoveto gsave product show grestore\n"
"0 -12 rmoveto gsave version show ( ) show revision 20 string cvs show "
"grestore\n"
"0 -12 rmoveto gsave serialnumber 20 string cvs show grestore\n"
"showpage");
/*
* Finish the job...
*/
end_ps(ppd);
}
/*
* 'report_levels()' - Report supply levels.
*/
static void
report_levels(ppd_file_t *ppd, /* I - PPD file */
const char *user) /* I - Printing user */
{
/*
* Put the printer in PostScript mode...
*/
begin_ps(ppd, user);
/*
* Don't bother sending any additional PostScript commands, since we just
* want the backend to have enough time to collect the supply info.
*/
/*
* Finish the job...
*/
end_ps(ppd);
}
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