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ef416fc2 | 1 | /* |
bc44d920 | 2 | * "$Id: statbuf.c 6649 2007-07-11 21:46:42Z mike $" |
ef416fc2 | 3 | * |
4 | * Status buffer routines for the Common UNIX Printing System (CUPS) | |
5 | * scheduler. | |
6 | * | |
bc44d920 | 7 | * Copyright 2007 by Apple Inc. |
e00b005a | 8 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 9 | * |
10 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 11 | * property of Apple Inc. and are protected by Federal copyright |
12 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
13 | * which should have been included with this file. If this file is | |
14 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 15 | * |
16 | * Contents: | |
17 | * | |
18 | * cupsdStatBufNew() - Create a new status buffer. | |
19 | * cupsdStatBufDelete() - Destroy a status buffer. | |
20 | * cupsdStatBufUpdate() - Update the status buffer. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Include necessary headers... | |
25 | */ | |
26 | ||
27 | #include "cupsd.h" | |
28 | #include <stdarg.h> | |
29 | ||
30 | ||
31 | /* | |
32 | * 'cupsdStatBufNew()' - Create a new status buffer. | |
33 | */ | |
34 | ||
35 | cupsd_statbuf_t * /* O - New status buffer */ | |
36 | cupsdStatBufNew(int fd, /* I - File descriptor of pipe */ | |
37 | const char *prefix, /* I - Printf-style prefix string */ | |
38 | ...) /* I - Additional args as needed */ | |
39 | { | |
40 | cupsd_statbuf_t *sb; /* New status buffer */ | |
41 | va_list ap; /* Argument list */ | |
42 | ||
43 | ||
44 | /* | |
45 | * Range check input... | |
46 | */ | |
47 | ||
48 | if (fd < 0) | |
49 | return (NULL); | |
50 | ||
51 | /* | |
52 | * Allocate the status buffer... | |
53 | */ | |
54 | ||
55 | if ((sb = calloc(1, sizeof(cupsd_statbuf_t))) != NULL) | |
56 | { | |
57 | /* | |
58 | * Assign the file descriptor... | |
59 | */ | |
60 | ||
61 | sb->fd = fd; | |
62 | ||
63 | /* | |
64 | * Format the prefix string, if any. This is usually "[Job 123]" | |
65 | * or "[Sub 123]", and so forth. | |
66 | */ | |
67 | ||
68 | if (prefix) | |
69 | { | |
70 | /* | |
71 | * Printf-style prefix string... | |
72 | */ | |
73 | ||
74 | va_start(ap, prefix); | |
75 | vsnprintf(sb->prefix, sizeof(sb->prefix), prefix, ap); | |
76 | va_end(ap); | |
77 | } | |
78 | else | |
79 | { | |
80 | /* | |
81 | * No prefix string... | |
82 | */ | |
83 | ||
84 | sb->prefix[0] = '\0'; | |
85 | } | |
86 | } | |
87 | ||
88 | return (sb); | |
89 | } | |
90 | ||
91 | ||
92 | /* | |
93 | * 'cupsdStatBufDelete()' - Destroy a status buffer. | |
94 | */ | |
95 | ||
96 | void | |
97 | cupsdStatBufDelete(cupsd_statbuf_t *sb) /* I - Status buffer */ | |
98 | { | |
99 | /* | |
100 | * Range check input... | |
101 | */ | |
102 | ||
103 | if (!sb) | |
104 | return; | |
105 | ||
106 | /* | |
107 | * Close the status pipe and free memory used... | |
108 | */ | |
109 | ||
110 | close(sb->fd); | |
111 | ||
112 | free(sb); | |
113 | } | |
114 | ||
115 | ||
116 | /* | |
117 | * 'cupsdStatBufUpdate()' - Update the status buffer. | |
118 | */ | |
119 | ||
120 | char * /* O - Line from buffer, "", or NULL */ | |
121 | cupsdStatBufUpdate(cupsd_statbuf_t *sb, /* I - Status buffer */ | |
122 | int *loglevel, | |
123 | /* O - Log level */ | |
124 | char *line, | |
125 | /* I - Line buffer */ | |
126 | int linelen) | |
127 | /* I - Size of line buffer */ | |
128 | { | |
129 | int bytes; /* Number of bytes read */ | |
130 | char *lineptr, /* Pointer to end of line in buffer */ | |
131 | *message; /* Pointer to message text */ | |
132 | ||
133 | ||
134 | /* | |
135 | * Check if the buffer already contains a full line... | |
136 | */ | |
137 | ||
138 | if ((lineptr = strchr(sb->buffer, '\n')) == NULL) | |
139 | { | |
140 | /* | |
141 | * No, read more data... | |
142 | */ | |
143 | ||
144 | if ((bytes = read(sb->fd, sb->buffer + sb->bufused, | |
145 | CUPSD_SB_BUFFER_SIZE - sb->bufused - 1)) > 0) | |
146 | { | |
147 | sb->bufused += bytes; | |
148 | sb->buffer[sb->bufused] = '\0'; | |
149 | ||
150 | /* | |
151 | * Guard against a line longer than the max buffer size... | |
152 | */ | |
153 | ||
154 | if ((lineptr = strchr(sb->buffer, '\n')) == NULL && | |
155 | sb->bufused == (CUPSD_SB_BUFFER_SIZE - 1)) | |
156 | lineptr = sb->buffer + sb->bufused; | |
157 | } | |
158 | else if (bytes < 0 && errno == EINTR) | |
159 | { | |
160 | /* | |
161 | * Return an empty line if we are interrupted... | |
162 | */ | |
163 | ||
164 | *loglevel = CUPSD_LOG_NONE; | |
165 | line[0] = '\0'; | |
166 | ||
167 | return (line); | |
168 | } | |
169 | else | |
170 | { | |
171 | /* | |
172 | * End-of-file, so use the whole buffer... | |
173 | */ | |
174 | ||
175 | lineptr = sb->buffer + sb->bufused; | |
176 | *lineptr = '\0'; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Final check for end-of-file... | |
181 | */ | |
182 | ||
183 | if (sb->bufused == 0 && bytes == 0) | |
184 | lineptr = NULL; | |
185 | } | |
186 | ||
d09495fa | 187 | if (!lineptr) |
ef416fc2 | 188 | { |
189 | /* | |
190 | * End of file... | |
191 | */ | |
192 | ||
193 | *loglevel = CUPSD_LOG_NONE; | |
194 | line[0] = '\0'; | |
195 | ||
196 | return (NULL); | |
197 | } | |
198 | ||
199 | /* | |
200 | * Terminate the line and process it... | |
201 | */ | |
202 | ||
203 | *lineptr++ = '\0'; | |
204 | ||
205 | /* | |
206 | * Figure out the logging level... | |
207 | */ | |
208 | ||
209 | if (!strncmp(sb->buffer, "EMERG:", 6)) | |
210 | { | |
211 | *loglevel = CUPSD_LOG_EMERG; | |
212 | message = sb->buffer + 6; | |
213 | } | |
214 | else if (!strncmp(sb->buffer, "ALERT:", 6)) | |
215 | { | |
216 | *loglevel = CUPSD_LOG_ALERT; | |
217 | message = sb->buffer + 6; | |
218 | } | |
219 | else if (!strncmp(sb->buffer, "CRIT:", 5)) | |
220 | { | |
221 | *loglevel = CUPSD_LOG_CRIT; | |
222 | message = sb->buffer + 5; | |
223 | } | |
224 | else if (!strncmp(sb->buffer, "ERROR:", 6)) | |
225 | { | |
226 | *loglevel = CUPSD_LOG_ERROR; | |
227 | message = sb->buffer + 6; | |
228 | } | |
229 | else if (!strncmp(sb->buffer, "WARNING:", 8)) | |
230 | { | |
231 | *loglevel = CUPSD_LOG_WARN; | |
232 | message = sb->buffer + 8; | |
233 | } | |
234 | else if (!strncmp(sb->buffer, "NOTICE:", 7)) | |
235 | { | |
236 | *loglevel = CUPSD_LOG_NOTICE; | |
237 | message = sb->buffer + 7; | |
238 | } | |
239 | else if (!strncmp(sb->buffer, "INFO:", 5)) | |
240 | { | |
241 | *loglevel = CUPSD_LOG_INFO; | |
242 | message = sb->buffer + 5; | |
243 | } | |
244 | else if (!strncmp(sb->buffer, "DEBUG:", 6)) | |
245 | { | |
246 | *loglevel = CUPSD_LOG_DEBUG; | |
247 | message = sb->buffer + 6; | |
248 | } | |
249 | else if (!strncmp(sb->buffer, "DEBUG2:", 7)) | |
250 | { | |
251 | *loglevel = CUPSD_LOG_DEBUG2; | |
252 | message = sb->buffer + 7; | |
253 | } | |
254 | else if (!strncmp(sb->buffer, "PAGE:", 5)) | |
255 | { | |
256 | *loglevel = CUPSD_LOG_PAGE; | |
257 | message = sb->buffer + 5; | |
258 | } | |
259 | else if (!strncmp(sb->buffer, "STATE:", 6)) | |
260 | { | |
261 | *loglevel = CUPSD_LOG_STATE; | |
262 | message = sb->buffer + 6; | |
263 | } | |
264 | else if (!strncmp(sb->buffer, "ATTR:", 5)) | |
265 | { | |
266 | *loglevel = CUPSD_LOG_ATTR; | |
267 | message = sb->buffer + 5; | |
268 | } | |
269 | else | |
270 | { | |
89d46774 | 271 | *loglevel = CUPSD_LOG_DEBUG; |
ef416fc2 | 272 | message = sb->buffer; |
273 | } | |
274 | ||
275 | /* | |
276 | * Skip leading whitespace in the message... | |
277 | */ | |
278 | ||
279 | while (isspace(*message & 255)) | |
280 | message ++; | |
281 | ||
282 | /* | |
283 | * Send it to the log file as needed... | |
284 | */ | |
285 | ||
286 | if (*loglevel > CUPSD_LOG_NONE && | |
287 | (*loglevel != CUPSD_LOG_INFO || LogLevel == CUPSD_LOG_DEBUG2)) | |
288 | { | |
289 | /* | |
290 | * General status message; send it to the error_log file... | |
291 | */ | |
292 | ||
293 | if (message[0] == '[') | |
294 | cupsdLogMessage(*loglevel, "%s", message); | |
295 | else | |
296 | cupsdLogMessage(*loglevel, "%s %s", sb->prefix, message); | |
297 | } | |
e00b005a | 298 | else if (*loglevel < CUPSD_LOG_NONE && LogLevel == CUPSD_LOG_DEBUG2) |
299 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "%s %s", sb->prefix, sb->buffer); | |
ef416fc2 | 300 | |
301 | /* | |
302 | * Copy the message to the line buffer... | |
303 | */ | |
304 | ||
305 | strlcpy(line, message, linelen); | |
306 | ||
307 | /* | |
308 | * Copy over the buffer data we've used up... | |
309 | */ | |
310 | ||
e53920b9 | 311 | if (lineptr < sb->buffer + sb->bufused) |
312 | _cups_strcpy(sb->buffer, lineptr); | |
313 | ||
ef416fc2 | 314 | sb->bufused -= lineptr - sb->buffer; |
315 | ||
316 | if (sb->bufused < 0) | |
317 | sb->bufused = 0; | |
318 | ||
319 | return (line); | |
320 | } | |
321 | ||
322 | ||
323 | /* | |
bc44d920 | 324 | * End of "$Id: statbuf.c 6649 2007-07-11 21:46:42Z mike $". |
ef416fc2 | 325 | */ |