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128be09c N |
1 | #include "uucp.h" |
2 | #include "uucpdefs.h" | |
3 | #include <sys/types.h> | |
4 | #include <sys/stat.h> | |
5 | #include <sys/dir.h> | |
6 | ||
7 | #define APPCMD(d) {\ | |
8 | char *p;\ | |
9 | for (p = d; *p != '\0';) *cmdp++ = *p++;\ | |
10 | *cmdp++ = ' ';\ | |
11 | *cmdp = '\0';} | |
12 | ||
13 | /* | |
14 | * uuxqt will execute commands set up by a uux command, | |
15 | * usually from a remote machine - set by uucp. | |
16 | */ | |
17 | ||
18 | char *Cmds[] = { | |
19 | "mail", | |
20 | "rmail", | |
21 | "lpr", | |
22 | "opr", | |
23 | "fsend", | |
24 | "fget", | |
25 | NULL | |
26 | }; | |
27 | #define CMDOK(a, b) cmdok(a,b) | |
28 | #define PATH "PATH=/bin:/usr/bin;" | |
29 | /* to remove restrictions from uuxqt | |
30 | * redefine CMDOK 0 | |
31 | * | |
32 | * to add allowable commands, add to the list under Cmds[] | |
33 | */ | |
34 | ||
35 | main(argc, argv) | |
36 | char *argv[]; | |
37 | { | |
38 | char xcmd[100]; | |
39 | int cmdnok; | |
40 | char xfile[MAXFULLNAME], user[10], buf[BUFSIZ]; | |
41 | char lbuf[30]; | |
42 | char cfile[NAMESIZE], dfile[MAXFULLNAME]; | |
43 | char file[NAMESIZE]; | |
44 | char fin[MAXFULLNAME], sysout[NAMESIZE], fout[MAXFULLNAME]; | |
45 | FILE *xfp, *dfp, *fp; | |
46 | char path[MAXFULLNAME]; | |
47 | char cmd[BUFSIZ]; | |
48 | char *cmdp, prm[MAXFULLNAME], *ptr; | |
49 | char *getprm(); | |
50 | int uid, ret; | |
51 | int stcico = 0; | |
52 | Debug = 0; | |
53 | Ofn = 1; | |
54 | Ifn = 0; | |
55 | while (argc>1 && argv[1][0] == '-') { | |
56 | switch(argv[1][1]){ | |
57 | case 'x': | |
58 | Debug = atoi(&argv[1][2]); | |
59 | if (Debug <= 0) | |
60 | Debug = 1; | |
61 | break; | |
62 | default: | |
63 | sprintf(stderr, "unknown flag %s\n", argv[1]); | |
64 | break; | |
65 | } | |
66 | --argc; argv++; | |
67 | } | |
68 | ||
69 | DEBUG(4, "\n\n** %s **\n", "START"); | |
70 | chdir(Spool); | |
71 | strcpy(Wrkdir, Spool); | |
72 | uid = getuid(); | |
73 | guinfo(uid, User, path); | |
74 | DEBUG(4, "User - %s\n", User); | |
75 | if (ulockf(X_LOCK, X_LOCKTIME) != 0) | |
76 | exit(0); | |
77 | ||
78 | DEBUG(4, "process %s\n", ""); | |
79 | while (gtxfile(xfile) > 0) { | |
80 | DEBUG(4, "xfile - %s\n", xfile); | |
81 | ||
82 | xfp = fopen(xfile, "r"); | |
83 | ASSERT(xfp != NULL, "CAN'T OPEN %s", xfile); | |
84 | ||
85 | /* initialize to default */ | |
86 | strcpy(user, User); | |
87 | strcpy(fin, "/dev/null"); | |
88 | strcpy(fout, "/dev/null"); | |
89 | sprintf(sysout, "%.7s", Myname); | |
90 | while (fgets(buf, BUFSIZ, xfp) != NULL) { | |
91 | switch (buf[0]) { | |
92 | case X_USER: | |
93 | sscanf(&buf[1], "%s%s", user, Rmtname); | |
94 | break; | |
95 | case X_STDIN: | |
96 | sscanf(&buf[1], "%s", fin); | |
97 | expfile(fin); | |
98 | break; | |
99 | case X_STDOUT: | |
100 | sscanf(&buf[1], "%s%s", fout, sysout); | |
101 | sysout[7] = '\0'; | |
102 | if (fout[0] != '~' || prefix(sysout, Myname)) | |
103 | expfile(fout); | |
104 | break; | |
105 | case X_CMD: | |
106 | strcpy(cmd, &buf[2]); | |
107 | if (*(cmd + strlen(cmd) - 1) == '\n') | |
108 | *(cmd + strlen(cmd) - 1) = '\0'; | |
109 | break; | |
110 | default: | |
111 | break; | |
112 | } | |
113 | } | |
114 | ||
115 | fclose(xfp); | |
116 | DEBUG(4, "fin - %s, ", fin); | |
117 | DEBUG(4, "fout - %s, ", fout); | |
118 | DEBUG(4, "sysout - %s, ", sysout); | |
119 | DEBUG(4, "user - %s\n", user); | |
120 | DEBUG(4, "cmd - %s\n", cmd); | |
121 | ||
122 | /* command execution */ | |
123 | if (strcmp(fout, "/dev/null") == SAME) | |
124 | strcpy(dfile,"/dev/null"); | |
125 | else | |
126 | gename(DATAPRE, sysout, 'O', dfile); | |
127 | ||
128 | /* expand file names where necessary */ | |
129 | expfile(dfile); | |
130 | strcpy(buf, PATH); | |
131 | cmdp = buf + strlen(buf); | |
132 | ptr = cmd; | |
133 | xcmd[0] = '\0'; | |
134 | cmdnok = 0; | |
135 | while ((ptr = getprm(ptr, prm)) != NULL) { | |
136 | if (prm[0] == ';' || prm[0] == '^' | |
137 | || prm[0] == '|') { | |
138 | xcmd[0] = '\0'; | |
139 | APPCMD(prm); | |
140 | continue; | |
141 | } | |
142 | if ((cmdnok = CMDOK(xcmd, prm)) != 0) | |
143 | /* command not valid */ | |
144 | break; | |
145 | ||
146 | if (prm[0] == '~') | |
147 | expfile(prm); | |
148 | APPCMD(prm); | |
149 | } | |
150 | if (cmdnok) { | |
151 | sprintf(lbuf, "%s XQT DENIED", user); | |
152 | logent(cmd, lbuf); | |
153 | DEBUG(4, "bad command %s\n", prm); | |
154 | goto rmfiles; | |
155 | } | |
156 | sprintf(lbuf, "%s XQT", user); | |
157 | logent(buf, lbuf); | |
158 | DEBUG(4, "cmd %s\n", buf); | |
159 | ||
160 | mvxfiles(xfile); | |
161 | chdir(XQTDIR); | |
162 | ret = shio(buf, fin, dfile, user); | |
163 | DEBUG(4, "exit cmd - %d\n", ret); | |
164 | chdir(Spool); | |
165 | rmxfiles(xfile); | |
166 | if (ret != 0) { | |
167 | /* exit status not zero */ | |
168 | dfp = fopen(dfile, "a"); | |
169 | ASSERT(dfp != NULL, "CAN'T OPEN %s", dfile); | |
170 | fprintf(dfp, "exit status %d", ret); | |
171 | fclose(dfp); | |
172 | } | |
173 | if (strcmp(fout, "/dev/null") != SAME) { | |
174 | if (prefix(sysout, Myname)) { | |
175 | xmv(dfile, fout); | |
176 | } | |
177 | else { | |
178 | gename(CMDPRE, sysout, 'O', cfile); | |
179 | fp = fopen(cfile, "w"); | |
180 | ASSERT(fp != NULL, "OPEN %s", cfile); | |
181 | chmod(cfile, 0666); | |
182 | fprintf(fp, "S %s %s %s - %s 0666\n", | |
183 | dfile, fout, user, lastpart(dfile)); | |
184 | fclose(fp); | |
185 | } | |
186 | } | |
187 | rmfiles: | |
188 | xfp = fopen(xfile, "r"); | |
189 | ASSERT(xfp != NULL, "CAN'T OPEN %s", xfile); | |
190 | while (fgets(buf, BUFSIZ, xfp) != NULL) { | |
191 | if (buf[0] != X_RQDFILE) | |
192 | continue; | |
193 | sscanf(&buf[1], "%s", file); | |
194 | unlink(file); | |
195 | } | |
196 | unlink(xfile); | |
197 | } | |
198 | ||
199 | if (stcico) | |
200 | xuucico(""); | |
201 | cleanup(0); | |
202 | } | |
203 | ||
204 | ||
205 | cleanup(code) | |
206 | int code; | |
207 | { | |
208 | logcls(); | |
209 | rmlock(NULL); | |
210 | exit(code); | |
211 | } | |
212 | ||
213 | ||
214 | /******* | |
215 | * gtxfile(file) get a file to execute | |
216 | * char *file; | |
217 | * | |
218 | * return codes: 0 - no file | 1 - file to execute | |
219 | */ | |
220 | ||
221 | gtxfile(file) | |
222 | char *file; | |
223 | { | |
224 | static FILE *pdir; | |
225 | char pre[2]; | |
226 | ||
227 | if (pdir == NULL) { | |
228 | pdir = fopen(Spool, "r"); | |
229 | ASSERT(pdir != NULL, "GTXFILE CAN'T OPEN %s", Spool); | |
230 | } | |
231 | ||
232 | pre[0] = XQTPRE; | |
233 | pre[1] = '\0'; | |
234 | while (gnamef(pdir, file) != 0) { | |
235 | DEBUG(4, "file - %s\n", file); | |
236 | if (!prefix(pre, file)) | |
237 | continue; | |
238 | if (gotfiles(file)) | |
239 | /* return file to execute */ | |
240 | return(1); | |
241 | } | |
242 | ||
243 | fclose(pdir); | |
244 | return(0); | |
245 | } | |
246 | ||
247 | ||
248 | /*** | |
249 | * gotfiles(file) check for needed files | |
250 | * char *file; | |
251 | * | |
252 | * return codes: 0 - not ready | 1 - all files ready | |
253 | */ | |
254 | ||
255 | gotfiles(file) | |
256 | char *file; | |
257 | { | |
258 | struct stat stbuf; | |
259 | FILE *fp; | |
260 | char buf[BUFSIZ], rqfile[MAXFULLNAME]; | |
261 | ||
262 | fp = fopen(file, "r"); | |
263 | if (fp == NULL) | |
264 | return(0); | |
265 | ||
266 | while (fgets(buf, BUFSIZ, fp) != NULL) { | |
267 | DEBUG(4, "%s\n", buf); | |
268 | if (buf[0] != X_RQDFILE) | |
269 | continue; | |
270 | sscanf(&buf[1], "%s", rqfile); | |
271 | expfile(rqfile); | |
272 | if (stat(rqfile, &stbuf) == -1) { | |
273 | fclose(fp); | |
274 | return(0); | |
275 | } | |
276 | } | |
277 | ||
278 | fclose(fp); | |
279 | return(1); | |
280 | } | |
281 | ||
282 | ||
283 | /*** | |
284 | * rmxfiles(xfile) remove execute files to x-directory | |
285 | * char *xfile; | |
286 | * | |
287 | * return codes - none | |
288 | */ | |
289 | ||
290 | rmxfiles(xfile) | |
291 | char *xfile; | |
292 | { | |
293 | FILE *fp; | |
294 | char buf[BUFSIZ], file[NAMESIZE], tfile[NAMESIZE]; | |
295 | char tfull[MAXFULLNAME]; | |
296 | ||
297 | if((fp = fopen(xfile, "r")) == NULL) | |
298 | return; | |
299 | ||
300 | while (fgets(buf, BUFSIZ, fp) != NULL) { | |
301 | if (buf[0] != X_RQDFILE) | |
302 | continue; | |
303 | if (sscanf(&buf[1], "%s%s", file, tfile) < 2) | |
304 | continue; | |
305 | sprintf(tfull, "%s/%s", XQTDIR, tfile); | |
306 | unlink(tfull); | |
307 | } | |
308 | fclose(fp); | |
309 | return; | |
310 | } | |
311 | ||
312 | ||
313 | /*** | |
314 | * mvxfiles(xfile) move execute files to x-directory | |
315 | * char *xfile; | |
316 | * | |
317 | * return codes - none | |
318 | */ | |
319 | ||
320 | mvxfiles(xfile) | |
321 | char *xfile; | |
322 | { | |
323 | FILE *fp; | |
324 | char buf[BUFSIZ], ffile[MAXFULLNAME], tfile[NAMESIZE]; | |
325 | char tfull[MAXFULLNAME]; | |
326 | int ret; | |
327 | ||
328 | if((fp = fopen(xfile, "r")) == NULL) | |
329 | return; | |
330 | ||
331 | while (fgets(buf, BUFSIZ, fp) != NULL) { | |
332 | if (buf[0] != X_RQDFILE) | |
333 | continue; | |
334 | if (sscanf(&buf[1], "%s%s", ffile, tfile) < 2) | |
335 | continue; | |
336 | expfile(ffile); | |
337 | sprintf(tfull, "%s/%s", XQTDIR, tfile); | |
338 | unlink(tfull); | |
339 | ret = link(ffile, tfull); | |
340 | ASSERT(ret == 0, "LINK RET-%d", ret); | |
341 | unlink(ffile); | |
342 | } | |
343 | fclose(fp); | |
344 | return; | |
345 | } | |
346 | ||
347 | ||
348 | /*** | |
349 | * cmdok(xc, cmd) check for valid command | |
350 | * char *xc, *cmd; | |
351 | * | |
352 | * return 0 - ok | 1 nok | |
353 | */ | |
354 | ||
355 | cmdok(xc, cmd) | |
356 | char *xc, *cmd; | |
357 | { | |
358 | char **ptr; | |
359 | ||
360 | if (xc[0] != '\0') | |
361 | return(0); | |
362 | ptr = Cmds; | |
363 | while(*ptr != NULL) { | |
364 | DEBUG(4, "cmd %s, ", cmd); | |
365 | DEBUG(4, "ptr %s\n", *ptr); | |
366 | if (strcmp(cmd, *ptr) == SAME) | |
367 | break; | |
368 | ptr++; | |
369 | } | |
370 | if (*ptr == NULL) | |
371 | return(1); | |
372 | strcpy(xc, cmd); | |
373 | return(0); | |
374 | } |