/opensource.apple.com/source/netinfo/netinfo-369.2/servers/netinfod/alert.c

# · C · 331 lines · 261 code · 40 blank · 30 comment · 26 complexity · 51f580301eeec55640aea959d6cd12d0 MD5 · raw file 

    

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    5. 

  5. <title>alert.c</title>
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    8. 

  8. .enscript-function-name { font-weight: bold; color: rgb(0,0,255); }
    9. 

  9. .enscript-variable-name { font-weight: bold; color: rgb(184,134,11); }
    10. 

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    11. 

  11. .enscript-reference { font-weight: bold; color: rgb(95,158,160); }
    12. 

  12. .enscript-string { font-weight: bold; color: rgb(188,143,143); }
    13. 

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    14. 

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    19. 

  19. <h1 style="margin:8px;" id="f1">alert.c&nbsp;&nbsp;&nbsp;<span style="font-weight: normal; font-size: 0.5em;">[<a href="?txt">plain text</a>]</span></h1>
    20. 

  20. <hr/>
    21. 

  21. <div></div>
    22. 

  22. <pre>
    23. 

  23. <span class="enscript-comment">/*
    24. 

  24.  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
    25. 

  25.  *
    26. 

  26.  * @APPLE_LICENSE_HEADER_START@
    27. 

  27.  * 
    28. 

  28.  * This file contains Original Code and/or Modifications of Original Code
    29. 

  29.  * as defined in and that are subject to the Apple Public Source License
    30. 

  30.  * Version 2.0 (the 'License'). You may not use this file except in
    31. 

  31.  * compliance with the License. Please obtain a copy of the License at
    32. 

  32.  * <a href="http://www.opensource.apple.com/apsl/">http://www.opensource.apple.com/apsl/</a> and read it before using this
    33. 

  33.  * file.
    34. 

  34.  * 
    35. 

  35.  * The Original Code and all software distributed under the License are
    36. 

  36.  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
    37. 

  37.  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
    38. 

  38.  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
    39. 

  39.  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
    40. 

  40.  * Please see the License for the specific language governing rights and
    41. 

  41.  * limitations under the License.
    42. 

  42.  * 
    43. 

  43.  * @APPLE_LICENSE_HEADER_END@
    44. 

  44.  */</span>
    45. 

  45. 

  46. <span class="enscript-comment">/*
    47. 

  47.  * Alert handling (allow user to abort local domain binding)
    48. 

  48.  * Copyright (C) 1989 by NeXT, Inc.
    49. 

  49.  *
    50. 

  50.  */</span>
    51. 

  51. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;NetInfo/config.h&gt;</span>
    52. 

  52.  
    53. 

  53. <span class="enscript-comment">/*
    54. 

  54.  * Disabled for MacOS X for the momment,
    55. 

  55.  * There's no support for console alerts yet.
    56. 

  56.  */</span>
    57. 

  57. #<span class="enscript-reference">ifdef</span> <span class="enscript-variable-name">_OS_APPLE_</span>
    58. 

  58. 

  59. <span class="enscript-type">static</span> <span class="enscript-type">int</span> aborted = 0;
    60. 

  60. 

  61. <span class="enscript-type">static</span> <span class="enscript-type">enum</span> { 
    62. 

  62. 	ALERT_FRESH,
    63. 

  63. 	ALERT_OPENED,
    64. 

  64. 	ALERT_PRINTED, 
    65. 

  65. 	ALERT_CLOSED
    66. 

  66. } alert_state = ALERT_CLOSED;
    67. 

  67. 

  68. <span class="enscript-type">void</span>
    69. 

  69. <span class="enscript-function-name">alert_enable</span>(<span class="enscript-type">int</span> enable)
    70. 

  70. {
    71. 

  71. 	<span class="enscript-keyword">if</span> (enable) alert_state = ALERT_FRESH;
    72. 

  72. 	<span class="enscript-keyword">else</span> alert_state = ALERT_CLOSED;
    73. 

  73. }
    74. 

  74. 

  75. <span class="enscript-type">int</span>
    76. 

  76. <span class="enscript-function-name">alert_aborted</span>(<span class="enscript-type">void</span>)
    77. 

  77. {
    78. 

  78. 	<span class="enscript-keyword">return</span> aborted;
    79. 

  79. }
    80. 

  80. 

  81. <span class="enscript-type">void</span>
    82. 

  82. <span class="enscript-function-name">alert_close</span>(<span class="enscript-type">void</span>)
    83. 

  83. {
    84. 

  84. 	<span class="enscript-keyword">if</span> (alert_state != ALERT_PRINTED) <span class="enscript-keyword">return</span>;
    85. 

  85. 	alert_state = ALERT_CLOSED;
    86. 

  86. }
    87. 

  87. 

  88. <span class="enscript-type">void</span> <span class="enscript-function-name">alert_open</span>(<span class="enscript-type">const</span> <span class="enscript-type">char</span> *language)
    89. 

  89. {
    90. 

  90. 	<span class="enscript-keyword">if</span> (alert_state != ALERT_FRESH) <span class="enscript-keyword">return</span>;
    91. 

  91. 	alert_state = ALERT_PRINTED;
    92. 

  92. }
    93. 

  93. 

  94. #<span class="enscript-reference">else</span>
    95. 

  95. 

  96. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;stdio.h&gt;</span>
    97. 

  97. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;unistd.h&gt;</span>
    98. 

  98. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;string.h&gt;</span>
    99. 

  99. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;sys/file.h&gt;</span>
    100. 

  100. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;sys/param.h&gt;</span>
    101. 

  101. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;errno.h&gt;</span>
    102. 

  102. #<span class="enscript-reference">ifdef</span> <span class="enscript-variable-name">_OS_NEXT_</span>
    103. 

  103. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">BUNDLE_PATH</span>	<span class="enscript-string">&quot;/usr/lib/NextStep/Resources&quot;</span>
    104. 

  104. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">_PATH_CONSOLE</span> <span class="enscript-string">&quot;/dev/console&quot;</span>
    105. 

  105. #<span class="enscript-reference">else</span>
    106. 

  106. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">BUNDLE_PATH</span>	<span class="enscript-string">&quot;/System/Library/CoreServices/Resources&quot;</span>
    107. 

  107. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;sys/ioctl_compat.h&gt;</span>
    108. 

  108. #<span class="enscript-reference">endif</span>
    109. 

  109. #<span class="enscript-reference">ifndef</span> <span class="enscript-variable-name">_PATH_CONSOLE</span>
    110. 

  110. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;paths.h&gt;</span>
    111. 

  111. #<span class="enscript-reference">endif</span>
    112. 

  112. #<span class="enscript-reference">include</span> <span class="enscript-string">&quot;ni_globals.h&quot;</span>
    113. 

  113. #<span class="enscript-reference">include</span> <span class="enscript-string">&quot;system.h&quot;</span>
    114. 

  114. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;NetInfo/system_log.h&gt;</span>
    115. 

  115. 

  116. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">KERNEL_PRIVATE</span>
    117. 

  117. #<span class="enscript-reference">include</span> <span class="enscript-string">&lt;dev/kmreg_com.h&gt;</span>
    118. 

  118. #<span class="enscript-reference">undef</span> <span class="enscript-variable-name">KERNEL_PRIVATE</span>
    119. 

  119. 

  120. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">MAXLINE</span> 4096
    121. 

  121. #<span class="enscript-reference">define</span> <span class="enscript-variable-name">STRING_TABLE</span> <span class="enscript-string">&quot;NetInfo&quot;</span>
    122. 

  122. 

  123. <span class="enscript-type">static</span> <span class="enscript-type">const</span> <span class="enscript-type">char</span> SEARCH_MESSAGE[] = 
    124. 

  124. 	<span class="enscript-string">&quot;\\nStill searching for parent network administration (NetInfo) &quot;</span>
    125. 

  125. 	<span class="enscript-string">&quot;server.\\nPlease wait, or press 'c' to continue without network &quot;</span>
    126. 

  126. 	<span class="enscript-string">&quot;user accounts.\\n\\nSee your system administrator if you need help.\\n&quot;</span>;
    127. 

  127. 

  128. <span class="enscript-type">static</span> <span class="enscript-type">const</span> <span class="enscript-type">char</span> MESSAGE[] = 
    129. 

  129. 	<span class="enscript-string">&quot;\nStill searching for parent network administration (NetInfo) &quot;</span>
    130. 

  130. 	<span class="enscript-string">&quot;server.\nPlease wait, or press 'c' to continue without network &quot;</span>
    131. 

  131. 	<span class="enscript-string">&quot;user accounts.\n\nSee your system administrator if you need help.\n&quot;</span>;
    132. 

  132. 

  133. <span class="enscript-type">static</span> <span class="enscript-type">int</span> aborted = 0;
    134. 

  134. <span class="enscript-type">static</span> <span class="enscript-type">int</span> console;
    135. 

  135. <span class="enscript-type">static</span> <span class="enscript-type">int</span> console_flags;
    136. 

  136. <span class="enscript-type">static</span> <span class="enscript-type">struct</span> sgttyb console_sg;
    137. 

  137. <span class="enscript-type">static</span> <span class="enscript-type">enum</span> { 
    138. 

  138. 	ALERT_FRESH,
    139. 

  139. 	ALERT_OPENED,
    140. 

  140. 	ALERT_PRINTED, 
    141. 

  141. 	ALERT_CLOSED
    142. 

  142. } alert_state = ALERT_CLOSED;
    143. 

  143. 

  144. <span class="enscript-comment">/*
    145. 

  145.  * Enable (or disable) alerts
    146. 

  146.  */</span>
    147. 

  147. <span class="enscript-type">void</span>
    148. 

  148. <span class="enscript-function-name">alert_enable</span>(<span class="enscript-type">int</span> enable)
    149. 

  149. {
    150. 

  150. 	<span class="enscript-keyword">if</span> (enable) alert_state = ALERT_FRESH;
    151. 

  151. 	<span class="enscript-keyword">else</span> alert_state = ALERT_CLOSED;
    152. 

  152. }
    153. 

  153. 

  154. <span class="enscript-comment">/*
    155. 

  155.  * Did the user abort the alert?
    156. 

  156.  */</span>
    157. 

  157. <span class="enscript-type">int</span>
    158. 

  158. <span class="enscript-function-name">alert_aborted</span>(<span class="enscript-type">void</span>)
    159. 

  159. {
    160. 

  160. 	<span class="enscript-keyword">return</span> (aborted);
    161. 

  161. }
    162. 

  162. 

  163. <span class="enscript-comment">/*
    164. 

  164.  * Close an alert
    165. 

  165.  */</span>
    166. 

  166. <span class="enscript-type">void</span>
    167. 

  167. <span class="enscript-function-name">alert_close</span>(<span class="enscript-type">void</span>)
    168. 

  168. {
    169. 

  169. 	<span class="enscript-keyword">if</span> (alert_state != ALERT_PRINTED) <span class="enscript-keyword">return</span>;
    170. 

  170. 	alert_state = ALERT_CLOSED;
    171. 

  171. 

  172. 	<span class="enscript-comment">/* Restore fd flags */</span>
    173. 

  173. 	fcntl(console, F_SETFL, console_flags);
    174. 

  174. 

  175. 	<span class="enscript-comment">/* Restore terminal parameters */</span>
    176. 

  176. 	ioctl(console, TIOCSETP, &amp;console_sg);
    177. 

  177. 

  178. 	<span class="enscript-comment">/* Remove the window */</span>
    179. 

  179. 	ioctl(console, KMIOCRESTORE, 0);
    180. 

  180. 	close(console);
    181. 

  181. }
    182. 

  182. 

  183. <span class="enscript-comment">/*
    184. 

  184.  * We got a SIGIO. Handle it.
    185. 

  185.  */</span>
    186. 

  186. <span class="enscript-type">static</span> <span class="enscript-type">void</span>
    187. 

  187. <span class="enscript-function-name">handle_io</span>(<span class="enscript-type">int</span> ignored)
    188. 

  188. {
    189. 

  189. 	<span class="enscript-type">char</span> buf[512];
    190. 

  190. 	<span class="enscript-type">char</span> *cp;
    191. 

  191. 	<span class="enscript-type">int</span> nchars;
    192. 

  192. 

  193. 	<span class="enscript-keyword">while</span> ((nchars = read(console, (<span class="enscript-type">char</span> *)&amp;buf, <span class="enscript-keyword">sizeof</span>(buf))) &gt; 0)
    194. 

  194. 	{
    195. 

  195. 		cp = buf;
    196. 

  196. 		<span class="enscript-keyword">while</span> (nchars--)
    197. 

  197. 		{
    198. 

  198. 			<span class="enscript-keyword">if</span> ((*cp == <span class="enscript-string">'c'</span>) || (*cp == <span class="enscript-string">'C'</span>))
    199. 

  199. 			{
    200. 

  200. 				system_log(LOG_DEBUG, <span class="enscript-string">&quot;Binding aborted&quot;</span>);
    201. 

  201. 				aborted = 1;
    202. 

  202. 				alert_close();
    203. 

  203. 				<span class="enscript-keyword">return</span>;
    204. 

  204. 			}
    205. 

  205. 			cp++;
    206. 

  206. 		}
    207. 

  207. 	}
    208. 

  208. 	<span class="enscript-keyword">if</span> (errno != EWOULDBLOCK) alert_close();
    209. 

  209. }
    210. 

  210. 

  211. <span class="enscript-comment">/*
    212. 

  212.  * Open an alert
    213. 

  213.  */</span>		
    214. 

  214. <span class="enscript-type">void</span>
    215. 

  215. <span class="enscript-function-name">alert_open</span>(<span class="enscript-type">const</span> <span class="enscript-type">char</span> *language)
    216. 

  216. {
    217. 

  217. 	<span class="enscript-type">struct</span> sgttyb sg;
    218. 

  218. 	FILE *fp;
    219. 

  219. 	<span class="enscript-type">char</span> filename[MAXPATHLEN + 1];
    220. 

  220. 	<span class="enscript-type">char</span> buf[MAXLINE];
    221. 

  221. 	<span class="enscript-type">char</span> outmsg[MAXLINE];
    222. 

  222. 	<span class="enscript-type">int</span> i, j, len;
    223. 

  223. 

  224. 	<span class="enscript-keyword">if</span> (alert_state != ALERT_FRESH) <span class="enscript-keyword">return</span>;
    225. 

  225. 	alert_state = ALERT_OPENED;
    226. 

  226. 

  227. 	<span class="enscript-comment">/* Open up the console */</span>
    228. 

  228. 	<span class="enscript-keyword">if</span> ((console = open(_PATH_CONSOLE, (O_RDWR|O_ALERT), 0)) &lt; 0)
    229. 

  229. 	{
    230. 

  230. 		system_log(LOG_ERR, <span class="enscript-string">&quot;console open failed: %s&quot;</span>, strerror(errno));
    231. 

  231. 		aborted = 1;
    232. 

  232. 		<span class="enscript-keyword">return</span>;
    233. 

  233. 	}
    234. 

  234. 

  235. 	<span class="enscript-comment">/* Flush any existing input */</span>
    236. 

  236. 	ioctl(console, TIOCFLUSH, FREAD);
    237. 

  237. 

  238. 	<span class="enscript-comment">/* Set it up to interrupt on input */</span>
    239. 

  239. 	<span class="enscript-keyword">if</span> ((console_flags = fcntl(console, F_GETFL, 0)) == -1)
    240. 

  240. 	{
    241. 

  241. 		system_log(LOG_ERR, <span class="enscript-string">&quot;console F_GETFL fcntl failed: %s&quot;</span>,
    242. 

  242. 			strerror(errno));
    243. 

  243. 		aborted = 1;
    244. 

  244. 		close(console);
    245. 

  245. 		<span class="enscript-keyword">return</span>;
    246. 

  246. 	}
    247. 

  247. 

  248. 	<span class="enscript-keyword">if</span> (fcntl(console, F_SETFL, (console_flags|FASYNC|FNDELAY)) == -1)
    249. 

  249. 	{
    250. 

  250. 		system_log(LOG_ERR, <span class="enscript-string">&quot;console F_SETFL fcntl failed: %s&quot;</span>,
    251. 

  251. 			strerror(errno));
    252. 

  252. 		aborted = 1;
    253. 

  253. 		close(console);
    254. 

  254. 		<span class="enscript-keyword">return</span>;
    255. 

  255. 	}
    256. 

  256. 

  257. 	signal(SIGIO, handle_io);
    258. 

  258. 

  259. 	<span class="enscript-comment">/* Put it in CBREAK mode */</span>
    260. 

  260. 	<span class="enscript-keyword">if</span> (ioctl(console, TIOCGETP, &amp;sg) == -1)
    261. 

  261. 	{
    262. 

  262. 		system_log(LOG_ERR, <span class="enscript-string">&quot;console TIOCGETP ioctl failed: %s&quot;</span>,
    263. 

  263. 			strerror(errno));
    264. 

  264. 		aborted = 1;
    265. 

  265. 		close(console);
    266. 

  266. 		<span class="enscript-keyword">return</span>;
    267. 

  267. 	}
    268. 

  268. 

  269. 	console_sg = sg;
    270. 

  270. 	sg.sg_flags |= CBREAK;
    271. 

  271. 	sg.sg_flags &amp;= ~ECHO;
    272. 

  272. 	<span class="enscript-keyword">if</span> (ioctl(console, TIOCSETP, &amp;sg) == -1)
    273. 

  273. 	{
    274. 

  274. 		system_log(LOG_ERR, <span class="enscript-string">&quot;console TIOCSETP ioctl failed: %s&quot;</span>,
    275. 

  275. 			strerror(errno));
    276. 

  276. 		aborted = 1;
    277. 

  277. 		close(console);
    278. 

  278. 		<span class="enscript-keyword">return</span>;
    279. 

  279. 	}
    280. 

  280. 

  281. 	alert_state = ALERT_PRINTED;
    282. 

  282. 

  283. 	sprintf(filename, <span class="enscript-string">&quot;%s/%s.lproj/%s.strings&quot;</span>,
    284. 

  284. 		BUNDLE_PATH, language, STRING_TABLE);
    285. 

  285. 	len = strlen(MESSAGE);
    286. 

  286. 

  287. 	fp = fopen(filename, <span class="enscript-string">&quot;r&quot;</span>);
    288. 

  288. 	<span class="enscript-keyword">if</span> (fp == NULL)
    289. 

  289. 	{
    290. 

  290. 		write(console, MESSAGE, len);
    291. 

  291. 		<span class="enscript-keyword">return</span>;
    292. 

  292. 	}
    293. 

  293. 

  294. 	<span class="enscript-keyword">while</span> (fgets(buf, MAXLINE, fp) != NULL)
    295. 

  295. 	{
    296. 

  296. 		<span class="enscript-keyword">if</span> (!strncmp(buf+1, SEARCH_MESSAGE, len))
    297. 

  297. 		{
    298. 

  298. 			<span class="enscript-keyword">for</span> (i = strlen(buf); ((buf[i] != <span class="enscript-string">'\&quot;'</span>) &amp;&amp; (i &gt; 0)); i--);
    299. 

  299. 			<span class="enscript-keyword">if</span> (i &lt;= 0) <span class="enscript-keyword">break</span>;
    300. 

  300. 			buf[i] = <span class="enscript-string">'\0'</span>;
    301. 

  301. 

  302. 			<span class="enscript-keyword">for</span> (i = strlen(SEARCH_MESSAGE) + 2; ((buf[i] != <span class="enscript-string">'\0'</span>) &amp;&amp; (buf[i] != <span class="enscript-string">'\&quot;'</span>)); i++);
    303. 

  303. 			<span class="enscript-keyword">if</span> (buf[i] == <span class="enscript-string">'\0'</span>) <span class="enscript-keyword">break</span>;
    304. 

  304. 

  305. 			i++;
    306. 

  306. 			j = 0;
    307. 

  307. 			<span class="enscript-keyword">for</span> (; buf[i] != <span class="enscript-string">'\0'</span>; i++)
    308. 

  308. 			{
    309. 

  309. 				<span class="enscript-keyword">if</span> ((buf[i] == <span class="enscript-string">'\\'</span>) &amp;&amp; (buf[i+1] == <span class="enscript-string">'n'</span>))
    310. 

  310. 				{
    311. 

  311. 					i++;
    312. 

  312. 					outmsg[j++] = <span class="enscript-string">'\n'</span>;
    313. 

  313. 				}
    314. 

  314. 				<span class="enscript-keyword">else</span> outmsg[j++] = buf[i];
    315. 

  315. 			}
    316. 

  316. 			<span class="enscript-keyword">if</span> (j == 0) <span class="enscript-keyword">break</span>;
    317. 

  317. 

  318. 			fclose(fp);
    319. 

  319. 			outmsg[j] = <span class="enscript-string">'\0'</span>;
    320. 

  320. 			write(console, outmsg, j);
    321. 

  321. 			<span class="enscript-keyword">return</span>;
    322. 

  322. 		}
    323. 

  323. 	}
    324. 

  324. 

  325. 	fclose(fp);
    326. 

  326. 	write(console, MESSAGE, len);
    327. 

  327. }
    328. 

  328. #<span class="enscript-reference">endif</span> <span class="enscript-variable-name">NO_CONSOLE_SUPPORT</span>
    329. 

  329. </pre>
    330. 

  330. <hr />
    331. 

  331. </body></html>
    332.