Bug Summary

File:bucoord/tape_hosts.c
Location:line 136, column 6
Description:Assigned value is always the same as the existing value

Annotated Source Code

1/*
2 * Copyright 2000, International Business Machines Corporation and others.
3 * All Rights Reserved.
4 *
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
8 */
9
10#include <afsconfig.h>
11#include <afs/param.h>
12#include <afs/stds.h>
13
14#include <roken.h>
15
16#include <afs/budb_client.h>
17#include <afs/cmd.h>
18#include <afs/com_err.h>
19#include <afs/bubasics.h>
20
21#include "bc.h"
22#include "error_macros.h"
23#include "bucoord_internal.h"
24#include "bucoord_prototypes.h"
25
26/* code to manage tape hosts
27 * specific to the ubik database implementation
28 */
29
30extern struct bc_config *bc_globalConfig;
31extern struct udbHandleS udbHandle;
32extern char *whoami;
33
34/* ------------------------------------
35 * command level routines
36 * ------------------------------------
37 */
38
39
40/* bc_AddHostCmd
41 * Add a host to the tape hosts
42 */
43
44int
45bc_AddHostCmd(struct cmd_syndesc *as, void *arock)
46{
47 struct cmd_item *ti;
48 udbClientTextP ctPtr;
49 afs_int32 port = 0;
50 afs_int32 code = 0;
51
52 ctPtr = &bc_globalConfig->configText[TB_TAPEHOSTS2];
53 code = bc_LockText(ctPtr);
54 if (code)
55 ERROR(code)do { code = code; goto error_exit; } while (0);
56
57 code = bc_UpdateHosts();
58 if (code) {
59 afs_com_err(whoami, code, "; Can't retrieve tape hosts");
60 return (code);
61 }
62
63 /* add tape hosts first */
64 ti = as->parms[0].items;
65 if (ti) {
66 if (as->parms[1].items) {
67 port = getPortOffset(as->parms[1].items->data);
68 if (port < 0)
69 ERROR(BC_BADARG)do { code = (156288000L); goto error_exit; } while (0);
70 }
71 printf("Adding host %s offset %u to tape list...", ti->data, port);
72 fflush(stdout__stdoutp);
73 code = bc_AddTapeHost(bc_globalConfig, ti->data, port);
74 if (code) {
75 printf("failed\n");
76 fflush(stdout__stdoutp);
77 if (code == EEXIST17)
78 afs_com_err(whoami, 0, "Port offset already in tape database");
79 ERROR(code)do { code = code; goto error_exit; } while (0);
80 }
81
82 code = bc_SaveHosts();
83 if (code) {
84 afs_com_err(whoami, code, "Cannot save tape hosts");
85 afs_com_err(whoami, 0,
86 "Changes are temporary - for this session only");
87 ERROR(code)do { code = code; goto error_exit; } while (0);
88 }
89 }
90
91 /* done */
92 printf("done\n");
93
94 error_exit:
95 if (ctPtr->lockHandle != 0)
96 bc_UnlockText(ctPtr);
97 return (code);
98}
99
100int
101bc_DeleteHostCmd(struct cmd_syndesc *as, void *arock)
102{
103 struct cmd_item *ti;
104 afs_int32 port = 0;
105 udbClientTextP ctPtr;
106 afs_int32 code = 0;
107
108 ctPtr = &bc_globalConfig->configText[TB_TAPEHOSTS2];
109 code = bc_LockText(ctPtr);
110 if (code)
1
Taking false branch
111 ERROR(code)do { code = code; goto error_exit; } while (0);
112
113 code = bc_UpdateHosts();
114 if (code) {
2
Taking false branch
115 afs_com_err(whoami, code, "; Can't retrieve tape hosts");
116 return (code);
117 }
118
119 /* delete tape hosts first */
120 ti = as->parms[0].items;
121 if (ti) {
3
Taking true branch
122 if (as->parms[1].items) {
4
Taking false branch
123 port = bc_SafeATOI(as->parms[1].items->data);
124 if (port < 0)
125 return (BC_BADARG(156288000L));
126 }
127
128 printf("Deleting host %s offset %u to tape list...", ti->data, port);
129 fflush(stdout__stdoutp);
130 code = bc_DeleteTapeHost(bc_globalConfig, ti->data, port);
131 if (code) {
5
Taking true branch
132 if (code == ENOENT2)
6
Taking false branch
133 printf("failed: no such host entry\n");
134 else
135 printf("failed with code %d\n", code);
136 ERROR(code)do { code = code; goto error_exit; } while (0);
7
Within the expansion of the macro 'ERROR':
a
Assigned value is always the same as the existing value
137 }
138
139 code = bc_SaveHosts();
140 if (code) {
141 afs_com_err(whoami, code, "Cannot save tape hosts");
142 afs_com_err(whoami, 0,
143 "Changes are temporary - for this session only");
144 ERROR(code)do { code = code; goto error_exit; } while (0);
145 }
146 }
147
148 /* done */
149 printf("done\n");
150 fflush(stdout__stdoutp);
151
152 error_exit:
153 if (ctPtr->lockHandle != 0)
154 bc_UnlockText(ctPtr);
155 return (code);
156}
157
158
159/* bc_ListHostsCmd
160 * list all tape hosts (from internally built tables)
161 * parameters:
162 * ignored
163 */
164
165int
166bc_ListHostsCmd(struct cmd_syndesc *as, void *arock)
167{
168 afs_int32 code;
169 struct bc_hostEntry *tentry;
170
171 code = bc_UpdateHosts();
172 if (code) {
173 afs_com_err(whoami, code, "; Can't retrieve tape hosts");
174 return (code);
175 }
176
177 printf("Tape hosts:\n");
178 for (tentry = bc_globalConfig->tapeHosts; tentry; tentry = tentry->next) {
179 printf(" Host %s, port offset %u\n", tentry->name,
180 tentry->portOffset);
181 }
182 fflush(stdout__stdoutp);
183 return 0;
184}
185
186
187
188/* ------------------------------------
189 * support routines
190 * ------------------------------------
191 */
192
193int
194bc_ClearHosts(void)
195{
196 struct bc_hostEntry *tentry, *temp;
197
198 tentry = bc_globalConfig->tapeHosts;
199 while (tentry != 0) {
200 temp = tentry->next;
201 free(tentry->name);
202 free(tentry);
203 tentry = temp;
204 }
205
206 bc_globalConfig->tapeHosts = (struct bc_hostEntry *)0;
207 return (0);
208}
209
210/* bc_ParseHosts
211 * Open up the volume set configuration file as specified in our argument,
212 * then parse the file to set up our internal representation.
213 * exit:
214 * 0 on successful processing,
215 * -1 otherwise.
216 */
217
218int
219bc_ParseHosts(void)
220{
221 char tbuffer[256];
222 char hostName[256];
223 afs_int32 port = 0;
224 struct bc_hostEntry *tfirst, *tlast, *the;
225 char *tp;
226 struct hostent *th;
227
228 udbClientTextP ctPtr;
229 FILE *stream;
230
231 /* initialize locally used variables */
232 ctPtr = &bc_globalConfig->configText[TB_TAPEHOSTS2];
233 stream = ctPtr->textStream;
234
235 if (ctPtr->textSize == 0) /* nothing defined yet */
236 return (0);
237
238 if (stream == NULL((void *)0))
239 return (BC_INTERNALERROR(156288014L));
240
241 rewind(stream);
242
243 /* now read the lines and build the structure list */
244 tfirst = tlast = (struct bc_hostEntry *)0;
245
246 while (1) {
247 tp = fgets(tbuffer, sizeof(tbuffer), stream);
248 if (!tp)
249 break; /* end of file */
250
251 sscanf(tbuffer, "%s %u", hostName, &port);
252 th = gethostbyname(hostName);
253 if (th == 0) {
254 afs_com_err(whoami, 0,
255 "can't get host info for %s from nameserver or /etc/hosts.",
256 hostName);
257 }
258 the = (struct bc_hostEntry *)malloc(sizeof(struct bc_hostEntry));
259 if (the == (struct bc_hostEntry *)0)
260 return (BC_NOMEM(156288003L));
261 memset(the, 0, sizeof(struct bc_hostEntry));
262 if (tlast) {
263 tlast->next = the;
264 tlast = the;
265 } else {
266 tfirst = tlast = the;
267 }
268 the->next = (struct bc_hostEntry *)0;
269 the->name = (char *)malloc(strlen(hostName) + 1);
270 strcpy(the->name, hostName);
271 the->portOffset = port;
272 if (th) {
273 memcpy(&the->addr.sin_addr.s_addr, th->h_addrh_addr_list[0], 4);
274#ifdef STRUCT_SOCKADDR_HAS_SA_LEN1
275 the->addr.sin_len = sizeof(struct sockaddr_in);
276#endif
277 the->addr.sin_family = AF_INET2;
278 the->addr.sin_port = 0;
279 }
280 }
281
282 bc_globalConfig->tapeHosts = tfirst;
283 return (0);
284}
285
286/* bc_SaveHosts
287 * really two parts
288 * 1) save the current host information to disk
289 * 2) transmit to ubik server
290 */
291
292int
293bc_SaveHosts(void)
294{
295 afs_int32 code = 0;
296
297 udbClientTextP ctPtr;
298 FILE *stream;
299 struct bc_hostEntry *hePtr;
300
301 extern struct bc_config *bc_globalConfig;
302
303 ctPtr = &bc_globalConfig->configText[TB_TAPEHOSTS2];
304 stream = ctPtr->textStream;
305
306 /* must be locked */
307 if (ctPtr->lockHandle == 0)
308 return (BC_INTERNALERROR(156288014L));
309
310 /* truncate the file */
311 code = ftruncate(fileno(stream)(!__isthreaded ? ((stream)->_file) : (fileno)(stream)), 0);
312 if (code)
313 ERROR(errno)do { code = (* __error()); goto error_exit; } while (0);
314
315 rewind(stream);
316
317 hePtr = bc_globalConfig->tapeHosts;
318
319 while (hePtr != 0) {
320 fprintf(stream, "%s %u\n", hePtr->name, hePtr->portOffset);
321 hePtr = hePtr->next;
322 }
323
324 if (ferror(stream)(!__isthreaded ? (((stream)->_flags & 0x0040) != 0) : (
ferror)(stream)))
325 return (BC_INTERNALERROR(156288014L));
326
327 /* send to server */
328 code = bcdb_SaveTextFile(ctPtr);
329 if (code)
330 ERROR(code)do { code = code; goto error_exit; } while (0);
331
332 /* do this on bcdb_SaveTextFile */
333 /* increment local version number */
334 ctPtr->textVersion++;
335
336 /* update locally stored file size */
337 ctPtr->textSize = filesize(ctPtr->textStream);
338
339 error_exit:
340 return (code);
341}
342
343afs_int32
344bc_UpdateHosts(void)
345{
346 struct udbHandleS *uhptr = &udbHandle;
347 udbClientTextP ctPtr;
348 afs_int32 code;
349 int lock = 0;
350
351 /* lock schedules and check validity */
352 ctPtr = &bc_globalConfig->configText[TB_TAPEHOSTS2];
353
354 code = bc_CheckTextVersion(ctPtr);
355 if (code != BC_VERSIONMISMATCH(156288001L)) {
356 ERROR(code)do { code = code; goto error_exit; } while (0); /* Version matches or some other error */
357 }
358
359 /* Must update the hosts */
360 /* If we are not already locked, then lock it now */
361 if (ctPtr->lockHandle == 0) {
362 code = bc_LockText(ctPtr);
363 if (code)
364 ERROR(code)do { code = code; goto error_exit; } while (0);
365 lock = 1;
366 }
367
368 if (ctPtr->textVersion != -1) {
369 afs_com_err(whoami, 0, "obsolete tapehosts - updating");
370 bc_ClearHosts();
371 }
372
373 /* open a temp file to store the config text received from buserver *
374 * The open file stream is stored in ctPtr->textStream */
375 code =
376 bc_openTextFile(ctPtr,
377 &bc_globalConfig->tmpTextFileNames[TB_TAPEHOSTS2][0]);
378 if (code)
379 ERROR(code)do { code = code; goto error_exit; } while (0);
380 /* now get a fresh set of information from the database */
381 code = bcdb_GetTextFile(ctPtr);
382 if (code)
383 ERROR(code)do { code = code; goto error_exit; } while (0);
384
385 /* fetch the version number */
386 code =
387 ubik_BUDB_GetTextVersion(uhptr->uh_client, 0, ctPtr->textType,
388 &ctPtr->textVersion);
389 if (code)
390 ERROR(code)do { code = code; goto error_exit; } while (0);
391
392 /* parse the file */
393 code = bc_ParseHosts();
394 if (code)
395 ERROR(code)do { code = code; goto error_exit; } while (0);
396
397 error_exit:
398 if (lock && ctPtr->lockHandle)
399 bc_UnlockText(ctPtr);
400 return (code);
401}