1: /*
2: * *
3: * * *
4: * * *
5: * ***************
6: * * * * *
7: * * MUMPS *
8: * * * * *
9: * ***************
10: * * *
11: * * *
12: * *
13: *
14: * grestore.c
15: * repairs degraded freem globals
16: *
17: *
18: * Author: Serena Willis <snw@coherent-logic.com>
19: * Copyright (C) 1998 MUG Deutschland
20: * Copyright (C) 2020 Coherent Logic Development LLC
21: *
22: *
23: * This file is part of FreeM.
24: *
25: * FreeM is free software: you can redistribute it and/or modify
26: * it under the terms of the GNU Affero Public License as published by
27: * the Free Software Foundation, either version 3 of the License, or
28: * (at your option) any later version.
29: *
30: * FreeM is distributed in the hope that it will be useful,
31: * but WITHOUT ANY WARRANTY; without even the implied warranty of
32: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33: * GNU Affero Public License for more details.
34: *
35: * You should have received a copy of the GNU Affero Public License
36: * along with FreeM. If not, see <https://www.gnu.org/licenses/>.
37: *
38: **/
39:
40: /* restores mumps globals.
41: * needs free disk storages approx. the size of the
42: * global to be restored. only data blocks are interpreted.
43: * it cannot recover from some errors in data blocks.
44: * anyway the global to be restored should be saved for
45: * a detailed analysis of the error.
46: */
47:
48: #include <stdlib.h>
49: #include <stddef.h>
50: #include "mpsdef0.h"
51: #include "errmsg.h"
52: #include <signal.h>
53: #include <setjmp.h>
54: #include <stdio.h>
55: #include <fcntl.h>
56: #include <unistd.h>
57: #include <sys/types.h>
58: #include <sys/stat.h>
59: #include <sys/wait.h>
60: #include <string.h>
61:
62:
63: /* needed if byte data are to be interpreted as unsigned integer */
64: #define UNSIGN(A) ((A)&0377)
65:
66: #define g_EOL 30
67: #define POINT 28
68: #define MINUS 26
69:
70: #define ROOT 0L
71: /* length of blocks. status bytes defined as offset to blocklength */
72: #define DATALIM (BLOCKLEN-11)
73: #define LLPTR (BLOCKLEN-10)
74: #define NRBLK LLPTR
75: #define RLPTR (BLOCKLEN- 6)
76: #define FREE RLPTR
77: #define BTYP (BLOCKLEN- 3)
78: #define OFFS (BLOCKLEN- 2)
79:
80: #define EMPTY 0
81: #define FBLK 1
82: #define POINTER 2
83: #define BOTTOM 6
84: #define DATA 8
85:
86: #define PROTECT 30
87:
88:
89: #ifndef SYSFIVE
90: #define FreeM_timezone -3600
91: #else
92:
93: #ifdef __CYGWIN__
94: #define FreeM_timezone _timezone
95: #else
96: extern long FreeM_timezone;
97: #endif /* __CYGWIN__ */
98:
99: #endif /* SYSFIVE */
100:
101: /* mumps commands */
102: #define BREAK 'b'
103: #define CLOSE 'c'
104: #define DO 'd'
105: #define DO_BLOCK 2
106: #define ELSE 'e'
107: #define FOR 'f'
108: #define GOTO 'g'
109: #define HA 'h'
110: #define HALT '0'
111: #define HANG '1'
112: #define IF 'i'
113: #define JOB 'j'
114: #define KILL 'k'
115: #define LOCK 'l'
116: #define NEW 'n'
117: #define OPEN 'o'
118: #define QUIT 'q'
119: #define READ 'r'
120: #define SET 's'
121: #define USE 'u'
122: #define VIEW 'v'
123: #define WRITE 'w'
124: #define XECUTE 'x'
125:
126: #define ZALLOCATE 'A'
127: #define ZBREAK 'B'
128: #define ZDEALLOCATE 'D'
129: #define ZGO 'G'
130: #define ZHALT 'H'
131: #define ZINSERT 'I'
132: #define ZJOB 'J'
133: #define ZLOAD 'L'
134: #define ZNEW 'N'
135: #define ZPRINT 'P'
136: #define ZQUIT 'Q'
137: #define ZREMOVE 'R'
138: #define ZSAVE 'S'
139: #define ZTRAP 'T'
140: #define ZWRITE 'W'
141: #define PRIVATE SP
142:
143: extern short ierr;
144:
145: int main (argc, argv)
146: int argc; /* arguments count */
147: char *argv[]; /* arguments string */
148:
149: {
150: char filnam[40]; /* global to be restored */
151: static
152: char savnam[512] = "^/usr/tmp/", /* intermediate storage */
153: unlnam[40] = "/usr/tmp/^"; /* "unlink" filename */
154: short fildes; /* file descriptor to filnam */
155: char block[BLOCKLEN];
156: char key[512];
157: char data[512];
158: unsigned long blknbr;
159: long offset;
160: short type;
161: long length;
162: long koffs;
163:
164: register int i,
165: j,
166: k,
167: ch;
168:
169: umask (0); /* protection bits mask to full rights */
170: filnam[0] = '^';
171: filnam[1] = 0;
172:
173: if (argc > 1) {
174: j = 0;
175: while (--argc > 0) {
176: j++;
177: if (**(argv + j) == '-') {
178: printf ("usage is: %s [^]global\012\015", *argv);
179: exit (0);
180: }
181: strcpy (&filnam[1], *(argv + j));
182: }
183: } else {
184: printf ("\012\015%s global ^", *argv);
185: scanf ("%s", &filnam[1]);
186: }
187:
188: j = filnam[1];
189: if (j == '.' || j == '/' || j == '^') {
190: j = 0;
191: while ((filnam[j] = filnam[j + 1]))
192: j++;
193: }
194: if ((fildes = open (filnam, 0)) == -1) {
195: printf ("cannot open file %s\007\012\015", filnam);
196: exit (1);
197: }
198: strcpy (&savnam[10], &filnam[1]);
199: koffs = 10 + strlen (&filnam[1]);
200: strcpy (&unlnam[10], &filnam[1]);
201: unlink (unlnam); /* kill previous tmp_file */
202: blknbr = ROOT;
203:
204: again:;
205:
206: lseek (fildes, blknbr * BLOCKLEN, 0);
207: blknbr++;
208: if (read (fildes, block, BLOCKLEN) == 0) {
209: strcpy (block, "mv /usr/tmp/\\^");
210: strcat (block, &filnam[1]);
211: strcat (block, " .");
212: system (block);
213: exit (0);
214: }
215: type = block[BTYP];
216: if (type != DATA)
217: goto again;
218:
219: offset = UNSIGN (block[OFFS]) * 256 +
220: UNSIGN (block[OFFS + 1]);
221: if (offset > DATALIM) {
222: printf ("illegal offset %ld\012", offset);
223: offset = DATALIM;
224: }
225: i = 0;
226: while (i < offset) {
227: length = UNSIGN (block[i++]);
228: k = UNSIGN (block[i++]);
229: if ((i + length) > offset)
230: break;
231: for (j = 0; j < length; j++)
232: key[k++] = block[i++];
233: key[k] = g_EOL;
234: /*----------------------*/
235: {
236: long ch0,
237: i,
238: j,
239: k;
240:
241: j = 0;
242: i = 0;
243: data[j++] = DELIM;
244: k = 1;
245: while ((ch = UNSIGN (key[i++])) != g_EOL) {
246: if (k) {
247: k = 0;
248: }
249: ch0 = (ch >= SP ? (ch >> 1) : /* 'string' chars */
250: (ch < 20 ? (ch >> 1) + '0' : /* 0...9 */
251: (ch >> 1) + SP)); /* '.' or '-' */
252: if (ch0 == DEL) {
253: if (((ch = UNSIGN (key[i++])) >> 1) == DEL) {
254: ch0 += DEL;
255: ch = UNSIGN (key[i++]);
256: }
257: ch0 += (ch >> 1);
258: }
259: data[j++] = ch0;
260: if (ch & 01) {
261: data[j++] = DELIM;
262: k = 1;
263: }
264: }
265: data[j--] = EOL;
266: if (j == 0)
267: data[0] = EOL;
268: else if (data[j] == DELIM)
269: data[j] = EOL;
270: if ((koffs + j) > 255)
271: goto again; /* oversize subscript */
272: while (j >= 0) {
273: if ((UNSIGN (ch = data[--j]) < SP) && (ch != DELIM))
274: break;
275: }
276:
277: if (j < 0)
278: stcpy (&savnam[koffs], data);
279: else
280: goto again; /* illegal subscipt */
281: /*----------------------*/
282: }
283: length = UNSIGN (block[i++]);
284: k = 0;
285: if ((i + length) > offset)
286: break;
287: stcpy0 (data, &block[i], length);
288: i += length;
289: data[length] = EOL;
290: global (0, savnam, data); /* call original global */
291:
292: if (merr () == PROTECT) {
293: printf ("\012cannot open intermediate file in /usr/tmp\012");
294: exit (1);
295: }
296: }
297: if (i != offset)
298: printf ("\012wrong offset %ld vs. %d\012", offset, i);
299: goto again;
300: }
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