1 /* te-vms.c -- Utilities for VMS.
2 Copyright (C) 2009-2023 Free Software Foundation, Inc.
3
4 Written by Douglas B Rupp <rupp@gnat.com>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
19
20 #include "as.h"
21 #include "te-vms.h"
22
23 /* The purpose of the two alternate versions below is to have one that
24 works for native VMS and one that works on an NFS mounted filesystem
25 (Unix Server/VMS client). The main issue being to generate the special
26 VMS file timestamps for the debug info. */
27
28 #ifdef VMS
29 #define __NEW_STARLET 1
30 #include <vms/starlet.h>
31 #include <vms/rms.h>
32 #include <vms/atrdef.h>
33 #include <vms/fibdef.h>
34 #include <vms/stsdef.h>
35 #include <vms/iodef.h>
36 #include <vms/fatdef.h>
37 #include <errno.h>
38 #include <vms/descrip.h>
39 #include <string.h>
40 #include <unixlib.h>
41
42 #define MAXPATH 256
43
44 /* Descrip.h doesn't have everything... */
45 typedef struct fibdef * __fibdef_ptr32 __attribute__ (( mode (SI) ));
46
47 struct dsc$descriptor_fib
48 {
49 unsigned int fib$l_len;
50 __fibdef_ptr32 fib$l_addr;
51 };
52
53 /* I/O Status Block. */
54 struct IOSB
55 {
56 unsigned short status, count;
57 unsigned int devdep;
58 };
59
60 static char *tryfile;
61
62 /* Variable length string. */
63 struct vstring
64 {
65 short length;
66 char string[NAM$C_MAXRSS+1];
67 };
68
69 static char filename_buff [MAXPATH];
70 static char vms_filespec [MAXPATH];
71
72 /* Callback function for filespec style conversion. */
73
74 static int
75 translate_unix (char *name, int type ATTRIBUTE_UNUSED)
76 {
77 strncpy (filename_buff, name, MAXPATH);
78 filename_buff [MAXPATH - 1] = (char) 0;
79 return 0;
80 }
81
82 /* Wrapper for DECC function that converts a Unix filespec
83 to VMS style filespec. */
84
85 static char *
86 to_vms_file_spec (char *filespec)
87 {
88 strncpy (vms_filespec, "", MAXPATH);
89 decc$to_vms (filespec, translate_unix, 1, 1);
90 strncpy (vms_filespec, filename_buff, MAXPATH);
91
92 vms_filespec [MAXPATH - 1] = (char) 0;
93
94 return vms_filespec;
95 }
96
97 #else /* not VMS */
98
99 #define _BSD_SOURCE 1
100 #include <sys/stat.h>
101 #include <time.h>
102
103 #define VMS_EPOCH_OFFSET 35067168000000000LL
104 #define VMS_GRANULARITY_FACTOR 10000000
105
106 #endif /* VMS */
107
108 /* Return VMS file date, size, format, version given a name. */
109
110 static int
111 vms_file_stats_name (const char *dirname,
112 const char *filename,
113 long long *cdt,
114 long *siz,
115 char *rfo,
116 int *ver)
117 {
118 char * fullname;
119
120 #ifdef VMS
121 struct FAB fab;
122 struct NAM nam;
123
124 unsigned long long create;
125 FAT recattr;
126 char ascnamebuff [256];
127
128 ATRDEF atrlst[]
129 = {
130 { ATR$S_CREDATE, ATR$C_CREDATE, &create },
131 { ATR$S_RECATTR, ATR$C_RECATTR, &recattr },
132 { ATR$S_ASCNAME, ATR$C_ASCNAME, &ascnamebuff },
133 { 0, 0, 0}
134 };
135
136 FIBDEF fib;
137 struct dsc$descriptor_fib fibdsc = {sizeof (fib), (void *) &fib};
138
139 struct IOSB iosb;
140
141 long status;
142 unsigned short chan;
143
144 struct vstring file;
145 struct dsc$descriptor_s filedsc
146 = {NAM$C_MAXRSS, DSC$K_DTYPE_T, DSC$K_CLASS_S, (void *) file.string};
147 struct vstring device;
148 struct dsc$descriptor_s devicedsc
149 = {NAM$C_MAXRSS, DSC$K_DTYPE_T, DSC$K_CLASS_S, (void *) device.string};
150 struct vstring result;
151 struct dsc$descriptor_s resultdsc
152 = {NAM$C_MAXRSS, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, (void *) result.string};
153
154 if (strcmp (filename, "<internal>") == 0
155 || strcmp (filename, "<built-in>") == 0)
156 {
157 if (cdt)
158 *cdt = 0;
159
160 if (siz)
161 *siz = 0;
162
163 if (rfo)
164 *rfo = 0;
165
166 if (ver)
167 *ver = 0;
168
169 return 0;
170 }
171
172 fullname = concat (dirname, filename, NULL);
173 tryfile = to_vms_file_spec (fullname);
174
175 /* Allocate and initialize a FAB and NAM structures. */
176 fab = cc$rms_fab;
177 nam = cc$rms_nam;
178
179 nam.nam$l_esa = file.string;
180 nam.nam$b_ess = NAM$C_MAXRSS;
181 nam.nam$l_rsa = result.string;
182 nam.nam$b_rss = NAM$C_MAXRSS;
183 fab.fab$l_fna = tryfile;
184 fab.fab$b_fns = strlen (tryfile);
185 fab.fab$l_nam = &nam;
186
187 /* Validate filespec syntax and device existence. */
188 status = SYS$PARSE (&fab, 0, 0);
189 if ((status & 1) != 1)
190 {
191 free (fullname);
192 return 1;
193 }
194
195 file.string[nam.nam$b_esl] = 0;
196
197 /* Find matching filespec. */
198 status = SYS$SEARCH (&fab, 0, 0);
199 if ((status & 1) != 1)
200 {
201 free (fullname);
202 return 1;
203 }
204
205 file.string[nam.nam$b_esl] = 0;
206 result.string[result.length=nam.nam$b_rsl] = 0;
207
208 /* Get the device name and assign an IO channel. */
209 strncpy (device.string, nam.nam$l_dev, nam.nam$b_dev);
210 devicedsc.dsc$w_length = nam.nam$b_dev;
211 chan = 0;
212 status = SYS$ASSIGN (&devicedsc, &chan, 0, 0, 0);
213 if ((status & 1) != 1)
214 {
215 free (fullname);
216 return 1;
217 }
218
219 /* Initialize the FIB and fill in the directory id field. */
220 memset (&fib, 0, sizeof (fib));
221 fib.fib$w_did[0] = nam.nam$w_did[0];
222 fib.fib$w_did[1] = nam.nam$w_did[1];
223 fib.fib$w_did[2] = nam.nam$w_did[2];
224 fib.fib$l_acctl = 0;
225 fib.fib$l_wcc = 0;
226 strcpy (file.string, (strrchr (result.string, ']') + 1));
227 filedsc.dsc$w_length = strlen (file.string);
228 result.string[result.length = 0] = 0;
229
230 /* Open and close the file to fill in the attributes. */
231 status
232 = SYS$QIOW (0, chan, IO$_ACCESS|IO$M_ACCESS, &iosb, 0, 0,
233 &fibdsc, &filedsc, &result.length, &resultdsc, &atrlst, 0);
234 if ((status & 1) != 1)
235 {
236 free (fullname);
237 return 1;
238 }
239
240 if ((iosb.status & 1) != 1)
241 {
242 free (fullname);
243 return 1;
244 }
245
246 result.string[result.length] = 0;
247 status = SYS$QIOW (0, chan, IO$_DEACCESS, &iosb, 0, 0, &fibdsc, 0, 0, 0,
248 &atrlst, 0);
249 if ((status & 1) != 1)
250 {
251 free (fullname);
252 return 1;
253 }
254
255 if ((iosb.status & 1) != 1)
256 {
257 free (fullname);
258 return 1;
259 }
260
261 /* Deassign the channel and exit. */
262 status = SYS$DASSGN (chan);
263 if ((status & 1) != 1)
264 {
265 free (fullname);
266 return 1;
267 }
268
269 if (cdt) *cdt = create;
270 if (siz) *siz = (512 * 65536 * recattr.fat$w_efblkh) +
271 (512 * (recattr.fat$w_efblkl - 1)) +
272 recattr.fat$w_ffbyte;
273 if (rfo) *rfo = recattr.fat$v_rtype;
274 if (ver) *ver = strtol (strrchr (ascnamebuff, ';') + 1, 0, 10);
275 #else /* not VMS */
276
277 struct stat buff;
278 struct tm *ts;
279 long long gmtoff, secs, nsecs;
280
281 fullname = concat (dirname, filename, NULL);
282
283 if ((stat (fullname, &buff)) != 0)
284 {
285 free (fullname);
286 return 1;
287 }
288
289 if (cdt)
290 {
291 ts = localtime (& buff.st_mtime);
292
293 #ifdef HAVE_TM_GMTOFF
294 gmtoff = ts->tm_gmtoff;
295 #else
296 {
297 extern long timezone;
298
299 if (ts->tm_isdst == 1)
300 gmtoff = - (timezone - 3600);
301 else
302 gmtoff = - timezone;
303 }
304 #endif
305
306 #ifdef HAVE_ST_MTIM_TV_SEC
307 secs = buff.st_mtim.tv_sec;
308 #else
309 secs = buff.st_mtime;
310 #endif
311
312 #ifdef HAVE_ST_MTIM_TV_NSEC
313 nsecs = buff.st_mtim.tv_nsec;
314 #else
315 nsecs = 0;
316 #endif
317
318 /* VMS timestamps are stored in local time to 100 nsec accuracy, but by
319 experiment I found timestamps truncated to (at least) microseconds
320 on an NFS mounted filesystem, hence the adjustment below. DBR. */
321 *cdt = ((secs + gmtoff) * VMS_GRANULARITY_FACTOR)
322 + (nsecs / 1000 * 10) + VMS_EPOCH_OFFSET;
323 }
324
325 if (siz)
326 *siz = buff.st_size;
327
328 if (rfo)
329 *rfo = 2; /* Stream LF format. */
330
331 /* Returning a file version of 0 is never correct for debug info, version 1
332 will be correct if file editing is done only on the Unix side. If editing
333 is done on the VMS side, then its TBD. */
334 if (ver)
335 *ver = 1;
336 #endif /* VMS */
337
338 free (fullname);
339 return 0;
340 }
341
342 uint64_t
343 vms_dwarf2_file_time_name (const char *filename, const char *dirname)
344 {
345 long long cdt;
346
347 if (vms_file_stats_name (dirname, filename, &cdt, 0, 0, 0) == 0)
348 return cdt;
349 else
350 return 0;
351 }
352
353 long
354 vms_dwarf2_file_size_name (const char *filename, const char *dirname)
355 {
356 long siz;
357
358 if (vms_file_stats_name (dirname, filename, 0, &siz, 0, 0) == 0)
359 return siz;
360 else
361 return 0;
362 }
363
364 /* VMS debugger needs the filename with version appended. */
365 /* Longest filename on VMS is 255 characters. Largest version is 32768. */
366 char *
367 vms_dwarf2_file_name (const char *filename, const char *dirname)
368 {
369 int ver;
370 static char buff [255 + 7];
371
372 vms_file_stats_name (dirname, filename, 0, 0, 0, &ver);
373 snprintf (buff, 255 + 7, "%s;%d", filename, ver);
374 return buff;
375 }