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1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
9d85c861 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
a399f6c8 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
d0aeaf5a DF |
16 | */ |
17 | ||
5f84f8f0 | 18 | #ifndef lint |
7bc71354 | 19 | static char sccsid[] = "@(#)rmjob.c 5.4 (Berkeley) %G%"; |
9d85c861 | 20 | #endif /* not lint */ |
5f84f8f0 | 21 | |
ccbfa562 RC |
22 | /* |
23 | * rmjob - remove the specified jobs from the queue. | |
24 | */ | |
25 | ||
26 | #include "lp.h" | |
27 | ||
28 | /* | |
29 | * Stuff for handling lprm specifications | |
30 | */ | |
31 | extern char *user[]; /* users to process */ | |
32 | extern int users; /* # of users in user array */ | |
33 | extern int requ[]; /* job number of spool entries */ | |
34 | extern int requests; /* # of spool requests */ | |
54266d1f | 35 | extern char *person; /* name of person doing lprm */ |
ccbfa562 | 36 | |
3d3c9f9f RC |
37 | char root[] = "root"; |
38 | int all = 0; /* eliminate all files (root only) */ | |
39 | int cur_daemon; /* daemon's pid */ | |
40 | char current[40]; /* active control file name */ | |
ccbfa562 RC |
41 | |
42 | int iscf(); | |
43 | ||
44 | rmjob() | |
45 | { | |
46 | register int i, nitems; | |
47 | int assasinated = 0; | |
48 | struct direct **files; | |
49 | ||
ccbfa562 RC |
50 | if ((i = pgetent(line, printer)) < 0) |
51 | fatal("cannot open printer description file"); | |
52 | else if (i == 0) | |
53 | fatal("unknown printer"); | |
54 | if ((SD = pgetstr("sd", &bp)) == NULL) | |
55 | SD = DEFSPOOL; | |
56 | if ((LO = pgetstr("lo", &bp)) == NULL) | |
57 | LO = DEFLOCK; | |
58 | if ((LP = pgetstr("lp", &bp)) == NULL) | |
59 | LP = DEFDEVLP; | |
60 | if ((RP = pgetstr("rp", &bp)) == NULL) | |
4d4caa50 | 61 | RP = DEFLP; |
a87bde97 | 62 | RM = pgetstr("rm", &bp); |
7bc71354 TF |
63 | /* |
64 | * Figure out whether the local machine is the same as the remote | |
65 | * machine entry (if it exists). If not, then ignore the local | |
66 | * queue information. | |
67 | */ | |
68 | if (RM != (char *) NULL) { | |
69 | char name[256]; | |
70 | struct hostent *hp; | |
71 | ||
72 | /* get the standard network name of the local host */ | |
73 | gethostname(name, sizeof(name)); | |
74 | name[sizeof(name)-1] = '\0'; | |
75 | hp = gethostbyname(name); | |
76 | if (hp == (struct hostent *) NULL) { | |
77 | printf("unable to get network name for local machine %s", | |
78 | name); | |
79 | goto localcheck_done; | |
80 | } else strcpy(name, hp->h_name); | |
81 | ||
82 | /* get the standard network name of RM */ | |
83 | hp = gethostbyname(RM); | |
84 | if (hp == (struct hostent *) NULL) { | |
85 | printf("unable to get hostname for remote machine %s", RM); | |
86 | goto localcheck_done; | |
87 | } | |
88 | ||
89 | /* if printer is not on local machine, ignore LP */ | |
90 | if (strcmp(name, hp->h_name) != 0) *LP = '\0'; | |
91 | } | |
92 | localcheck_done: | |
ccbfa562 RC |
93 | |
94 | /* | |
95 | * If the format was `lprm -' and the user isn't the super-user, | |
96 | * then fake things to look like he said `lprm user'. | |
97 | */ | |
98 | if (users < 0) { | |
99 | if (getuid() == 0) | |
100 | all = 1; /* all files in local queue */ | |
101 | else { | |
102 | user[0] = person; | |
103 | users = 1; | |
104 | } | |
105 | } | |
106 | if (!strcmp(person, "-all")) { | |
107 | if (from == host) | |
108 | fatal("The login name \"-all\" is reserved"); | |
109 | all = 1; /* all those from 'from' */ | |
110 | person = root; | |
111 | } | |
112 | ||
113 | if (chdir(SD) < 0) | |
114 | fatal("cannot chdir to spool directory"); | |
115 | if ((nitems = scandir(".", &files, iscf, NULL)) < 0) | |
116 | fatal("cannot access spool directory"); | |
117 | ||
118 | if (nitems) { | |
119 | /* | |
120 | * Check for an active printer daemon (in which case we | |
121 | * kill it if it is reading our file) then remove stuff | |
122 | * (after which we have to restart the daemon). | |
123 | */ | |
124 | if (lockchk(LO) && chk(current)) { | |
125 | assasinated = kill(cur_daemon, SIGINT) == 0; | |
126 | if (!assasinated) | |
127 | fatal("cannot kill printer daemon"); | |
128 | } | |
129 | /* | |
130 | * process the files | |
131 | */ | |
132 | for (i = 0; i < nitems; i++) | |
133 | process(files[i]->d_name); | |
134 | } | |
135 | chkremote(); | |
136 | /* | |
137 | * Restart the printer daemon if it was killed | |
138 | */ | |
775e8534 | 139 | if (assasinated && !startdaemon(printer)) |
ccbfa562 RC |
140 | fatal("cannot restart printer daemon\n"); |
141 | exit(0); | |
142 | } | |
143 | ||
144 | /* | |
145 | * Process a lock file: collect the pid of the active | |
146 | * daemon and the file name of the active spool entry. | |
147 | * Return boolean indicating existence of a lock file. | |
148 | */ | |
149 | lockchk(s) | |
150 | char *s; | |
151 | { | |
152 | register FILE *fp; | |
153 | register int i, n; | |
154 | ||
155 | if ((fp = fopen(s, "r")) == NULL) | |
156 | if (errno == EACCES) | |
157 | fatal("can't access lock file"); | |
158 | else | |
159 | return(0); | |
8fed920b | 160 | if (!getline(fp)) { |
ccbfa562 RC |
161 | (void) fclose(fp); |
162 | return(0); /* no daemon present */ | |
163 | } | |
164 | cur_daemon = atoi(line); | |
8fed920b RC |
165 | if (kill(cur_daemon, 0) < 0) { |
166 | (void) fclose(fp); | |
167 | return(0); /* no daemon present */ | |
168 | } | |
ccbfa562 | 169 | for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) { |
a87bde97 | 170 | if (i > 5) { |
ccbfa562 RC |
171 | n = 1; |
172 | break; | |
173 | } | |
174 | sleep(i); | |
175 | } | |
176 | current[n-1] = '\0'; | |
177 | (void) fclose(fp); | |
178 | return(1); | |
179 | } | |
180 | ||
181 | /* | |
182 | * Process a control file. | |
183 | */ | |
184 | process(file) | |
185 | char *file; | |
186 | { | |
187 | FILE *cfp; | |
188 | ||
189 | if (!chk(file)) | |
190 | return; | |
191 | if ((cfp = fopen(file, "r")) == NULL) | |
192 | fatal("cannot open %s", file); | |
3d3c9f9f | 193 | while (getline(cfp)) { |
ccbfa562 RC |
194 | switch (line[0]) { |
195 | case 'U': /* unlink associated files */ | |
196 | if (from != host) | |
197 | printf("%s: ", host); | |
198 | printf(unlink(line+1) ? "cannot dequeue %s\n" : | |
199 | "%s dequeued\n", line+1); | |
200 | } | |
201 | } | |
202 | (void) fclose(cfp); | |
203 | if (from != host) | |
204 | printf("%s: ", host); | |
205 | printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file); | |
206 | } | |
207 | ||
208 | /* | |
209 | * Do the dirty work in checking | |
210 | */ | |
211 | chk(file) | |
212 | char *file; | |
213 | { | |
214 | register int *r, n; | |
215 | register char **u, *cp; | |
216 | FILE *cfp; | |
217 | ||
139505f2 RC |
218 | /* |
219 | * Check for valid cf file name (mostly checking current). | |
220 | */ | |
221 | if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f') | |
222 | return(0); | |
223 | ||
ccbfa562 RC |
224 | if (all && (from == host || !strcmp(from, file+6))) |
225 | return(1); | |
226 | ||
227 | /* | |
228 | * get the owner's name from the control file. | |
229 | */ | |
230 | if ((cfp = fopen(file, "r")) == NULL) | |
231 | return(0); | |
232 | while (getline(cfp)) { | |
233 | if (line[0] == 'P') | |
234 | break; | |
235 | } | |
236 | (void) fclose(cfp); | |
237 | if (line[0] != 'P') | |
238 | return(0); | |
239 | ||
240 | if (users == 0 && requests == 0) | |
241 | return(!strcmp(file, current) && isowner(line+1, file)); | |
242 | /* | |
243 | * Check the request list | |
244 | */ | |
245 | for (n = 0, cp = file+3; isdigit(*cp); ) | |
246 | n = n * 10 + (*cp++ - '0'); | |
247 | for (r = requ; r < &requ[requests]; r++) | |
248 | if (*r == n && isowner(line+1, file)) | |
249 | return(1); | |
250 | /* | |
251 | * Check to see if it's in the user list | |
252 | */ | |
253 | for (u = user; u < &user[users]; u++) | |
254 | if (!strcmp(*u, line+1) && isowner(line+1, file)) | |
255 | return(1); | |
256 | return(0); | |
257 | } | |
258 | ||
259 | /* | |
260 | * If root is removing a file on the local machine, allow it. | |
4d4caa50 RC |
261 | * If root is removing a file from a remote machine, only allow |
262 | * files sent from the remote machine to be removed. | |
ccbfa562 RC |
263 | * Normal users can only remove the file from where it was sent. |
264 | */ | |
265 | isowner(owner, file) | |
266 | char *owner, *file; | |
267 | { | |
4d4caa50 RC |
268 | if (!strcmp(person, root) && (from == host || !strcmp(from, file+6))) |
269 | return(1); | |
270 | if (!strcmp(person, owner) && !strcmp(from, file+6)) | |
271 | return(1); | |
272 | if (from != host) | |
273 | printf("%s: ", host); | |
274 | printf("%s: Permission denied\n", file); | |
275 | return(0); | |
ccbfa562 RC |
276 | } |
277 | ||
278 | /* | |
279 | * Check to see if we are sending files to a remote machine. If we are, | |
280 | * then try removing files on the remote machine. | |
281 | */ | |
282 | chkremote() | |
283 | { | |
284 | register char *cp; | |
285 | register int i, rem; | |
286 | char buf[BUFSIZ]; | |
287 | ||
288 | if (*LP || RM == NULL) | |
289 | return; /* not sending to a remote machine */ | |
290 | ||
4d4caa50 RC |
291 | /* |
292 | * Flush stdout so the user can see what has been deleted | |
293 | * while we wait (possibly) for the connection. | |
294 | */ | |
295 | fflush(stdout); | |
296 | ||
ccbfa562 RC |
297 | sprintf(buf, "\5%s %s", RP, all ? "-all" : person); |
298 | cp = buf; | |
299 | for (i = 0; i < users; i++) { | |
300 | cp += strlen(cp); | |
301 | *cp++ = ' '; | |
302 | strcpy(cp, user[i]); | |
303 | } | |
304 | for (i = 0; i < requests; i++) { | |
305 | cp += strlen(cp); | |
306 | (void) sprintf(cp, " %d", requ[i]); | |
307 | } | |
308 | strcat(cp, "\n"); | |
a87bde97 | 309 | rem = getport(RM); |
ccbfa562 RC |
310 | if (rem < 0) { |
311 | if (from != host) | |
312 | printf("%s: ", host); | |
313 | printf("connection to %s is down\n", RM); | |
314 | } else { | |
315 | i = strlen(buf); | |
316 | if (write(rem, buf, i) != i) | |
317 | fatal("Lost connection"); | |
318 | while ((i = read(rem, buf, sizeof(buf))) > 0) | |
319 | (void) fwrite(buf, 1, i, stdout); | |
320 | (void) close(rem); | |
321 | } | |
322 | } | |
323 | ||
324 | /* | |
325 | * Return 1 if the filename begins with 'cf' | |
326 | */ | |
327 | iscf(d) | |
328 | struct direct *d; | |
329 | { | |
330 | return(d->d_name[0] == 'c' && d->d_name[1] == 'f'); | |
331 | } |