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哪里能找到cancel命令的源码？
以下就是 cencel.c 代码，请参考：
[code]
/*
* "$Id: cancel.c,v 1.19.2.13 2003/04/28 19:33:42 mike Exp $"
*
* "cancel" command for the Common UNIX Printing System (CUPS).
*
* Copyright 1997-2003 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
* property of Easy Software Products and are protected by Federal
* copyright law. Distribution and use rights are outlined in the file
* "LICENSE.txt" which should have been included with this file. If this
* file is missing or damaged please contact Easy Software Products
* at:
*
* Attn: CUPS Licensing Information
* Easy Software Products
* 44141 Airport View Drive, Suite 204
* Hollywood, Maryland 20636-3111 USA
*
* Voice: (301) 373-9603
* EMail: cups-info@cups.org
* WWW: http://www.cups.org
*
* Contents:
*
* main() - Parse options and cancel jobs.
*/
/*
* Include necessary headers...
*/
#include <stdio.h>;
#include <stdlib.h>;
#include <cups/string.h>;
#include <cups/cups.h>;
#include <cups/language.h>;
/*
* 'main()' - Parse options and cancel jobs.
*/
int /* O - Exit status */
main(int argc, /* I - Number of command-line arguments */
char *argv[]) /* I - Command-line arguments */
{
http_t *http; /* HTTP connection to server */
int i; /* Looping var */
int job_id; /* Job ID */
int num_dests; /* Number of destinations */
cups_dest_t *dests; /* Destinations */
char *dest, /* Destination printer */
*job, /* Job ID pointer */
*user; /* Cancel jobs for a user */
int purge; /* Purge or cancel jobs? */
char uri[1024]; /* Printer or job URI */
ipp_t *request; /* IPP request */
ipp_t *response; /* IPP response */
ipp_op_t op; /* Operation */
cups_lang_t *language; /* Language */
/*
* Setup to cancel individual print jobs...
*/
op = IPP_CANCEL_JOB;
purge = 0;
job_id = 0;
dest = NULL;
user = NULL;
http = NULL;
num_dests = 0;
dests = NULL;
/*
* Process command-line arguments...
*/
for (i = 1; i < argc; i ++)
if (argv[0] == '-' && argv[1])
switch (argv[1])
{
case 'E' : /* Encrypt */
#ifdef HAVE_SSL
cupsSetEncryption(HTTP_ENCRYPT_REQUIRED);
if (http)
httpEncryption(http, HTTP_ENCRYPT_REQUIRED);
#else
fprintf(stderr, "%s: Sorry, no encryption support compiled in!\n",
argv[0]);
#endif /* HAVE_SSL */
break;
case 'a' : /* Cancel all jobs */
purge = 1;
op = IPP_PURGE_JOBS;
break;
case 'h' : /* Connect to host */
if (http != NULL)
httpClose(http);
if (argv[2] != '\0')
cupsSetServer(argv + 2);
else
{
i ++;
if (i >;= argc)
{
fputs("cancel: Error - expected hostname after \'-h\' option!\n", stderr);
return (1);
}
else
cupsSetServer(argv);
}
break;
case 'u' : /* Username */
op = IPP_PURGE_JOBS;
if (argv[2] != '\0')
user = argv + 2;
else
{
i ++;
if (i >;= argc)
{
fputs("cancel: Error - expected username after \'-u\' option!\n", stderr);
return (1);
}
else
user = argv;
}
break;
default :
fprintf(stderr, "cancel: Unknown option \'%c\'!\n", argv[1]);
return (1);
}
else
{
/*
* Cancel a job or printer...
*/
if (num_dests == 0)
num_dests = cupsGetDests(&dests);
if (strcmp(argv, "-" == 0)
{
/*
* Delete the current job...
*/
dest = "";
job_id = 0;
}
else if (cupsGetDest(argv, NULL, num_dests, dests) != NULL)
{
/*
* Delete the current job on the named destination...
*/
dest = argv;
job_id = 0;
}
else if ((job = strrchr(argv, '-')) != NULL && isdigit(job[1]))
{
/*
* Delete the specified job ID.
*/
dest = NULL;
op = IPP_CANCEL_JOB;
job_id = atoi(job + 1);
}
else if (isdigit(argv[0]))
{
/*
* Delete the specified job ID.
*/
dest = NULL;
op = IPP_CANCEL_JOB;
job_id = atoi(argv);
}
else
{
/*
* Bad printer name!
*/
fprintf(stderr, "cancel: Unknown destination \"%s\"!\n", argv);
return (1);
}
/*
* For Solaris LP compatibility, ignore a destination name after
* cancelling a specific job ID...
*/
if (job_id && (i + 1) < argc &&
cupsGetDest(argv[i + 1], NULL, num_dests, dests) != NULL)
i ++;
/*
* Open a connection to the server...
*/
if (http == NULL)
if ((http = httpConnectEncrypt(cupsServer(), ippPort(),
cupsEncryption())) == NULL)
{
fputs("cancel: Unable to contact server!\n", stderr);
return (1);
}
/*
* Build an IPP request, which requires the following
* attributes:
*
* attributes-charset
* attributes-natural-language
* printer-uri + job-id *or* job-uri
* [requesting-user-name]
*/
request = ippNew();
request->;request.op.operation_id = op;
request->;request.op.request_id = 1;
language = cupsLangDefault();
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
"attributes-charset", NULL, cupsLangEncoding(language));
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
"attributes-natural-language", NULL, language->;language);
if (dest)
{
snprintf(uri, sizeof(uri), "ipp://localhost/printers/%s", dest);
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
"printer-uri", NULL, uri);
ippAddInteger(request, IPP_TAG_OPERATION, IPP_TAG_INTEGER, "job-id",
job_id);
}
else
{
sprintf(uri, "ipp://localhost/jobs/%d", job_id);
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "job-uri", NULL,
uri);
}
if (user)
{
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
"requesting-user-name", NULL, user);
ippAddBoolean(request, IPP_TAG_OPERATION, "my-jobs", 1);
}
else
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
"requesting-user-name", NULL, cupsUser());
if (op == IPP_PURGE_JOBS)
ippAddBoolean(request, IPP_TAG_OPERATION, "purge-jobs", purge);
/*
* Do the request and get back a response...
*/
if (op == IPP_PURGE_JOBS)
response = cupsDoRequest(http, request, "/admin/";
else
response = cupsDoRequest(http, request, "/jobs/";
if (response == NULL ||
response->;request.status.status_code >; IPP_OK_CONFLICT)
{
fprintf(stderr, "cancel: %s failed: %s\n",
op == IPP_PURGE_JOBS ? "purge-jobs" : "cancel-job",
response ? ippErrorString(response->;request.status.status_code) :
ippErrorString(cupsLastError()));
if (response)
ippDelete(response);
return (1);
}
ippDelete(response);
}
if (num_dests == 0 && op == IPP_PURGE_JOBS)
{
/*
* Open a connection to the server...
*/
if (http == NULL)
if ((http = httpConnectEncrypt(cupsServer(), ippPort(),
cupsEncryption())) == NULL)
{
fputs("cancel: Unable to contact server!\n", stderr);
return (1);
}
/*
* Build an IPP request, which requires the following
* attributes:
*
* attributes-charset
* attributes-natural-language
* printer-uri + job-id *or* job-uri
* [requesting-user-name]
*/
request = ippNew();
request->;request.op.operation_id = op;
request->;request.op.request_id = 1;
language = cupsLangDefault();
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
"attributes-charset", NULL, cupsLangEncoding(language));
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
"attributes-natural-language", NULL, language->;language);
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
"printer-uri", NULL, "ipp://localhost/printers/";
if (user)
{
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
"requesting-user-name", NULL, user);
ippAddBoolean(request, IPP_TAG_OPERATION, "my-jobs", 1);
}
else
ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
"requesting-user-name", NULL, cupsUser());
ippAddBoolean(request, IPP_TAG_OPERATION, "purge-jobs", purge);
/*
* Do the request and get back a response...
*/
response = cupsDoRequest(http, request, "/admin/";
if (response == NULL ||
response->;request.status.status_code >; IPP_OK_CONFLICT)
{
fprintf(stderr, "cancel: %s failed: %s\n",
op == IPP_PURGE_JOBS ? "purge-jobs" : "cancel-job",
response ? ippErrorString(response->;request.status.status_code) :
ippErrorString(cupsLastError()));
if (response)
ippDelete(response);
return (1);
}
ippDelete(response);
}
return (0);
}
/*
* End of "$Id: cancel.c,v 1.19.2.13 2003/04/28 19:33:42 mike Exp $".
*/
[\code] |
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发表于 2003-06-17 18:17
