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1.1 root 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: "rmail",
20: "rnews",
21: "vpr",
22: "w",
23: "fsend",
24: "fget",
25: "uusend",
26: "cp",
27: NULL
28: };
29: #define PATH "PATH=/bin:/usr/bin;"
30: /* to remove restrictions from uuxqt
31: * define ALLOK 1
32: *
33: * to add allowable commands, add to the list under Cmds[]
34: */
35:
36: main(argc, argv)
37: char *argv[];
38: {
39: char xcmd[100];
40: int cmdnok;
41: char xfile[MAXFULLNAME], user[32], buf[BUFSIZ];
42: char lbuf[30];
43: char cfile[NAMESIZE], dfile[MAXFULLNAME];
44: char file[NAMESIZE];
45: char fin[MAXFULLNAME], sysout[NAMESIZE], fout[MAXFULLNAME];
46: FILE *xfp, *dfp, *fp;
47: char path[MAXFULLNAME];
48: char cmd[BUFSIZ];
49: char *cmdp, prm[MAXFULLNAME], *ptr;
50: char *getprm();
51: int uid, ret;
52: int stcico = 0;
53: char rnum[5];
54:
55: uucpname(Myname);
56: Ofn = 1;
57: Ifn = 0;
58: while (argc>1 && argv[1][0] == '-') {
59: switch(argv[1][1]){
60: case 'x':
61: Debug = atoi(&argv[1][2]);
62: if (Debug <= 0)
63: Debug = 1;
64: break;
65: default:
66: sprintf(stderr, "unknown flag %s\n", argv[1]);
67: break;
68: }
69: --argc; argv++;
70: }
71:
72: DEBUG(4, "\n\n** %s **\n", "START");
73: chdir(Spool);
74: strcpy(Wrkdir, Spool);
75: uid = getuid();
76: guinfo(uid, User, path);
77: DEBUG(4, "User - %s\n", User);
78: if (ulockf(X_LOCK, X_LOCKTIME) != 0)
79: exit(0);
80:
81: DEBUG(4, "process %s\n", "");
82: while (gtxfile(xfile) > 0) {
83: DEBUG(4, "xfile - %s\n", xfile);
84:
85: xfp = fopen(xfile, "r");
86: ASSERT(xfp != NULL, "CAN'T OPEN %s", xfile);
87:
88: /* initialize to default */
89: strcpy(user, User);
90: strcpy(fin, "/dev/null");
91: strcpy(fout, "/dev/null");
92: sprintf(sysout, "%.7s", Myname);
93: while (fgets(buf, BUFSIZ, xfp) != NULL) {
94: switch (buf[0]) {
95: case X_USER:
96: sscanf(&buf[1], "%s%s", user, Rmtname);
97: break;
98: case X_STDIN:
99: sscanf(&buf[1], "%s", fin);
100: expfile(fin);
101: break;
102: case X_STDOUT:
103: sscanf(&buf[1], "%s%s", fout, sysout);
104: sysout[7] = '\0';
105: if (fout[0] != '~' || prefix(sysout, Myname))
106: expfile(fout);
107: break;
108: case X_CMD:
109: strcpy(cmd, &buf[2]);
110: if (*(cmd + strlen(cmd) - 1) == '\n')
111: *(cmd + strlen(cmd) - 1) = '\0';
112: break;
113: default:
114: break;
115: }
116: }
117:
118: fclose(xfp);
119: DEBUG(4, "fin - %s, ", fin);
120: DEBUG(4, "fout - %s, ", fout);
121: DEBUG(4, "sysout - %s, ", sysout);
122: DEBUG(4, "user - %s\n", user);
123: DEBUG(4, "cmd - %s\n", cmd);
124:
125: /* command execution */
126: if (strcmp(fout, "/dev/null") == SAME)
127: strcpy(dfile,"/dev/null");
128: else
129: gename(DATAPRE, sysout, 'O', dfile);
130:
131: /* expand file names where necessary */
132: expfile(dfile);
133: strcpy(buf, PATH);
134: cmdp = buf + strlen(buf);
135: ptr = cmd;
136: xcmd[0] = '\0';
137: cmdnok = 0;
138: while ((ptr = getprm(ptr, prm)) != NULL) {
139: if (prm[0] == ';' || prm[0] == '^'
140: || prm[0] == '|') {
141: xcmd[0] = '\0';
142: APPCMD(prm);
143: continue;
144: }
145: if ((cmdnok = cmdok(xcmd, prm)) != 0)
146: /* command not valid */
147: break;
148:
149: if (prm[0] == '~')
150: expfile(prm);
151: APPCMD(prm);
152: }
153: if (cmdnok) {
154: sprintf(lbuf, "%s XQT DENIED", user);
155: logent(cmd, lbuf);
156: DEBUG(4, "bad command %s\n", prm);
157: notify(user, Rmtname, cmd, "DENIED");
158: goto rmfiles;
159: }
160: sprintf(lbuf, "%s XQT", user);
161: logent(buf, lbuf);
162: DEBUG(4, "cmd %s\n", buf);
163:
164: mvxfiles(xfile);
165: chdir(XQTDIR);
166: ret = shio(buf, fin, dfile, user);
167: sprintf(rnum, "%d", ret);
168: if (ret != 0
169: || strcmp(xcmd, "rmail") != SAME
170: && strcmp(xcmd, "rnews") != SAME)
171: notify(user, Rmtname, cmd, rnum);
172: DEBUG(4, "exit cmd - %d\n", ret);
173: chdir(Spool);
174: rmxfiles(xfile);
175: if (ret != 0) {
176: /* exit status not zero */
177: dfp = fopen(dfile, "a");
178: ASSERT(dfp != NULL, "CAN'T OPEN %s", dfile);
179: fprintf(dfp, "exit status %d", ret);
180: fclose(dfp);
181: }
182: if (strcmp(fout, "/dev/null") != SAME) {
183: if (prefix(sysout, Myname)) {
184: xmv(dfile, fout);
185: }
186: else {
187: gename(CMDPRE, sysout, 'O', cfile);
188: fp = fopen(cfile, "w");
189: ASSERT(fp != NULL, "OPEN %s", cfile);
190: chmod(cfile, 0666);
191: fprintf(fp, "S %s %s %s - %s 0666\n",
192: dfile, fout, user, lastpart(dfile));
193: fclose(fp);
194: }
195: }
196: rmfiles:
197: xfp = fopen(xfile, "r");
198: ASSERT(xfp != NULL, "CAN'T OPEN %s", xfile);
199: while (fgets(buf, BUFSIZ, xfp) != NULL) {
200: if (buf[0] != X_RQDFILE)
201: continue;
202: sscanf(&buf[1], "%s", file);
203: unlink(file);
204: }
205: unlink(xfile);
206: }
207:
208: if (stcico)
209: xuucico("");
210: cleanup(0);
211: }
212:
213:
214: cleanup(code)
215: int code;
216: {
217: logcls();
218: rmlock(NULL);
219: exit(code);
220: }
221:
222:
223: /*******
224: * gtxfile(file) get a file to execute
225: * char *file;
226: *
227: * return codes: 0 - no file | 1 - file to execute
228: */
229:
230: gtxfile(file)
231: char *file;
232: {
233: static FILE *pdir;
234: char pre[2];
235:
236: if (pdir == NULL) {
237: pdir = fopen(Spool, "r");
238: ASSERT(pdir != NULL, "GTXFILE CAN'T OPEN %s", Spool);
239: }
240:
241: pre[0] = XQTPRE;
242: pre[1] = '\0';
243: while (gnamef(pdir, file) != 0) {
244: DEBUG(4, "file - %s\n", file);
245: if (!prefix(pre, file))
246: continue;
247: if (gotfiles(file))
248: /* return file to execute */
249: return(1);
250: }
251:
252: fclose(pdir);
253: return(0);
254: }
255:
256:
257: /***
258: * gotfiles(file) check for needed files
259: * char *file;
260: *
261: * return codes: 0 - not ready | 1 - all files ready
262: */
263:
264: gotfiles(file)
265: char *file;
266: {
267: struct stat stbuf;
268: FILE *fp;
269: char buf[BUFSIZ], rqfile[MAXFULLNAME];
270:
271: fp = fopen(file, "r");
272: if (fp == NULL)
273: return(0);
274:
275: while (fgets(buf, BUFSIZ, fp) != NULL) {
276: DEBUG(4, "%s\n", buf);
277: if (buf[0] != X_RQDFILE)
278: continue;
279: sscanf(&buf[1], "%s", rqfile);
280: expfile(rqfile);
281: if (stat(rqfile, &stbuf) == -1) {
282: fclose(fp);
283: return(0);
284: }
285: }
286:
287: fclose(fp);
288: return(1);
289: }
290:
291:
292: /***
293: * rmxfiles(xfile) remove execute files to x-directory
294: * char *xfile;
295: *
296: * return codes - none
297: */
298:
299: rmxfiles(xfile)
300: char *xfile;
301: {
302: FILE *fp;
303: char buf[BUFSIZ], file[NAMESIZE], tfile[NAMESIZE];
304: char tfull[MAXFULLNAME];
305:
306: if((fp = fopen(xfile, "r")) == NULL)
307: return;
308:
309: while (fgets(buf, BUFSIZ, fp) != NULL) {
310: if (buf[0] != X_RQDFILE)
311: continue;
312: if (sscanf(&buf[1], "%s%s", file, tfile) < 2)
313: continue;
314: sprintf(tfull, "%s/%s", XQTDIR, tfile);
315: unlink(tfull);
316: }
317: fclose(fp);
318: return;
319: }
320:
321:
322: /***
323: * mvxfiles(xfile) move execute files to x-directory
324: * char *xfile;
325: *
326: * return codes - none
327: */
328:
329: mvxfiles(xfile)
330: char *xfile;
331: {
332: FILE *fp;
333: char buf[BUFSIZ], ffile[MAXFULLNAME], tfile[NAMESIZE];
334: char tfull[MAXFULLNAME];
335: int ret;
336:
337: if((fp = fopen(xfile, "r")) == NULL)
338: return;
339:
340: while (fgets(buf, BUFSIZ, fp) != NULL) {
341: if (buf[0] != X_RQDFILE)
342: continue;
343: if (sscanf(&buf[1], "%s%s", ffile, tfile) < 2)
344: continue;
345: expfile(ffile);
346: sprintf(tfull, "%s/%s", XQTDIR, tfile);
347: unlink(tfull);
348: ret = link(ffile, tfull);
349: ASSERT(ret == 0, "LINK RET-%d", ret);
350: unlink(ffile);
351: }
352: fclose(fp);
353: return;
354: }
355:
356:
357: /***
358: * cmdok(xc, cmd) check for valid command
359: * *NOTE - side effect is to set xc to the
360: * command to be executed.
361: * char *xc, *cmd;
362: *
363: * return 0 - ok | 1 nok
364: */
365:
366: cmdok(xc, cmd)
367: char *xc, *cmd;
368: {
369: char **ptr;
370:
371: if (xc[0] != '\0')
372: return(0);
373: #ifndef ALLOK
374: ptr = Cmds;
375: while(*ptr != NULL) {
376: if (strcmp(cmd, *ptr) == SAME)
377: break;
378: ptr++;
379: }
380: if (*ptr == NULL)
381: return(1);
382: #endif
383: strcpy(xc, cmd);
384: return(0);
385: }
386:
387:
388: /***
389: * notify send mail to user giving execution results
390: * return code - none
391: * This program assumes new mail command - send remote mail
392: */
393:
394: notify(user, rmt, cmd, str)
395: char *user, *rmt, *cmd, *str;
396: {
397: char text[100];
398: char ruser[100];
399:
400: sprintf(text, "uuxqt cmd (%s) status (%s)", cmd, str);
401: if (prefix(rmt, Myname))
402: strcpy(ruser, user);
403: else
404: sprintf(ruser, "%s!%s", rmt, user);
405: mailst(ruser, text);
406: return;
407: }
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