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1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
9d85c861 KB |
3 | * All rights reserved. |
4 | * | |
af359dea C |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
d0aeaf5a DF |
32 | */ |
33 | ||
5f84f8f0 | 34 | #ifndef lint |
1c15e888 | 35 | static char sccsid[] = "@(#)rmjob.c 5.7 (Berkeley) 6/1/90"; |
9d85c861 | 36 | #endif /* not lint */ |
5f84f8f0 | 37 | |
ccbfa562 RC |
38 | /* |
39 | * rmjob - remove the specified jobs from the queue. | |
40 | */ | |
41 | ||
42 | #include "lp.h" | |
7abf8d65 | 43 | #include "pathnames.h" |
ccbfa562 RC |
44 | |
45 | /* | |
46 | * Stuff for handling lprm specifications | |
47 | */ | |
48 | extern char *user[]; /* users to process */ | |
49 | extern int users; /* # of users in user array */ | |
50 | extern int requ[]; /* job number of spool entries */ | |
51 | extern int requests; /* # of spool requests */ | |
54266d1f | 52 | extern char *person; /* name of person doing lprm */ |
ccbfa562 | 53 | |
3d3c9f9f RC |
54 | char root[] = "root"; |
55 | int all = 0; /* eliminate all files (root only) */ | |
56 | int cur_daemon; /* daemon's pid */ | |
57 | char current[40]; /* active control file name */ | |
ccbfa562 RC |
58 | |
59 | int iscf(); | |
60 | ||
61 | rmjob() | |
62 | { | |
63 | register int i, nitems; | |
64 | int assasinated = 0; | |
65 | struct direct **files; | |
b5eb1530 | 66 | char *cp; |
ccbfa562 | 67 | |
ccbfa562 RC |
68 | if ((i = pgetent(line, printer)) < 0) |
69 | fatal("cannot open printer description file"); | |
70 | else if (i == 0) | |
71 | fatal("unknown printer"); | |
72 | if ((SD = pgetstr("sd", &bp)) == NULL) | |
7abf8d65 | 73 | SD = _PATH_DEFSPOOL; |
ccbfa562 RC |
74 | if ((LO = pgetstr("lo", &bp)) == NULL) |
75 | LO = DEFLOCK; | |
76 | if ((LP = pgetstr("lp", &bp)) == NULL) | |
7abf8d65 | 77 | LP = _PATH_DEFDEVLP; |
ccbfa562 | 78 | if ((RP = pgetstr("rp", &bp)) == NULL) |
4d4caa50 | 79 | RP = DEFLP; |
a87bde97 | 80 | RM = pgetstr("rm", &bp); |
b5eb1530 TF |
81 | if (cp = checkremote()) |
82 | printf("Warning: %s\n", cp); | |
ccbfa562 RC |
83 | |
84 | /* | |
85 | * If the format was `lprm -' and the user isn't the super-user, | |
86 | * then fake things to look like he said `lprm user'. | |
87 | */ | |
88 | if (users < 0) { | |
89 | if (getuid() == 0) | |
90 | all = 1; /* all files in local queue */ | |
91 | else { | |
92 | user[0] = person; | |
93 | users = 1; | |
94 | } | |
95 | } | |
96 | if (!strcmp(person, "-all")) { | |
97 | if (from == host) | |
98 | fatal("The login name \"-all\" is reserved"); | |
99 | all = 1; /* all those from 'from' */ | |
100 | person = root; | |
101 | } | |
102 | ||
103 | if (chdir(SD) < 0) | |
104 | fatal("cannot chdir to spool directory"); | |
105 | if ((nitems = scandir(".", &files, iscf, NULL)) < 0) | |
106 | fatal("cannot access spool directory"); | |
107 | ||
108 | if (nitems) { | |
109 | /* | |
110 | * Check for an active printer daemon (in which case we | |
111 | * kill it if it is reading our file) then remove stuff | |
112 | * (after which we have to restart the daemon). | |
113 | */ | |
114 | if (lockchk(LO) && chk(current)) { | |
115 | assasinated = kill(cur_daemon, SIGINT) == 0; | |
116 | if (!assasinated) | |
117 | fatal("cannot kill printer daemon"); | |
118 | } | |
119 | /* | |
120 | * process the files | |
121 | */ | |
122 | for (i = 0; i < nitems; i++) | |
123 | process(files[i]->d_name); | |
124 | } | |
b5eb1530 | 125 | rmremote(); |
ccbfa562 RC |
126 | /* |
127 | * Restart the printer daemon if it was killed | |
128 | */ | |
775e8534 | 129 | if (assasinated && !startdaemon(printer)) |
ccbfa562 RC |
130 | fatal("cannot restart printer daemon\n"); |
131 | exit(0); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Process a lock file: collect the pid of the active | |
136 | * daemon and the file name of the active spool entry. | |
137 | * Return boolean indicating existence of a lock file. | |
138 | */ | |
139 | lockchk(s) | |
140 | char *s; | |
141 | { | |
142 | register FILE *fp; | |
143 | register int i, n; | |
144 | ||
145 | if ((fp = fopen(s, "r")) == NULL) | |
146 | if (errno == EACCES) | |
147 | fatal("can't access lock file"); | |
148 | else | |
149 | return(0); | |
8fed920b | 150 | if (!getline(fp)) { |
ccbfa562 RC |
151 | (void) fclose(fp); |
152 | return(0); /* no daemon present */ | |
153 | } | |
154 | cur_daemon = atoi(line); | |
8fed920b RC |
155 | if (kill(cur_daemon, 0) < 0) { |
156 | (void) fclose(fp); | |
157 | return(0); /* no daemon present */ | |
158 | } | |
ccbfa562 | 159 | for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) { |
a87bde97 | 160 | if (i > 5) { |
ccbfa562 RC |
161 | n = 1; |
162 | break; | |
163 | } | |
164 | sleep(i); | |
165 | } | |
166 | current[n-1] = '\0'; | |
167 | (void) fclose(fp); | |
168 | return(1); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Process a control file. | |
173 | */ | |
174 | process(file) | |
175 | char *file; | |
176 | { | |
177 | FILE *cfp; | |
178 | ||
179 | if (!chk(file)) | |
180 | return; | |
181 | if ((cfp = fopen(file, "r")) == NULL) | |
182 | fatal("cannot open %s", file); | |
3d3c9f9f | 183 | while (getline(cfp)) { |
ccbfa562 RC |
184 | switch (line[0]) { |
185 | case 'U': /* unlink associated files */ | |
186 | if (from != host) | |
187 | printf("%s: ", host); | |
188 | printf(unlink(line+1) ? "cannot dequeue %s\n" : | |
189 | "%s dequeued\n", line+1); | |
190 | } | |
191 | } | |
192 | (void) fclose(cfp); | |
193 | if (from != host) | |
194 | printf("%s: ", host); | |
195 | printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Do the dirty work in checking | |
200 | */ | |
201 | chk(file) | |
202 | char *file; | |
203 | { | |
204 | register int *r, n; | |
205 | register char **u, *cp; | |
206 | FILE *cfp; | |
207 | ||
139505f2 RC |
208 | /* |
209 | * Check for valid cf file name (mostly checking current). | |
210 | */ | |
211 | if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f') | |
212 | return(0); | |
213 | ||
ccbfa562 RC |
214 | if (all && (from == host || !strcmp(from, file+6))) |
215 | return(1); | |
216 | ||
217 | /* | |
218 | * get the owner's name from the control file. | |
219 | */ | |
220 | if ((cfp = fopen(file, "r")) == NULL) | |
221 | return(0); | |
222 | while (getline(cfp)) { | |
223 | if (line[0] == 'P') | |
224 | break; | |
225 | } | |
226 | (void) fclose(cfp); | |
227 | if (line[0] != 'P') | |
228 | return(0); | |
229 | ||
230 | if (users == 0 && requests == 0) | |
231 | return(!strcmp(file, current) && isowner(line+1, file)); | |
232 | /* | |
233 | * Check the request list | |
234 | */ | |
235 | for (n = 0, cp = file+3; isdigit(*cp); ) | |
236 | n = n * 10 + (*cp++ - '0'); | |
237 | for (r = requ; r < &requ[requests]; r++) | |
238 | if (*r == n && isowner(line+1, file)) | |
239 | return(1); | |
240 | /* | |
241 | * Check to see if it's in the user list | |
242 | */ | |
243 | for (u = user; u < &user[users]; u++) | |
244 | if (!strcmp(*u, line+1) && isowner(line+1, file)) | |
245 | return(1); | |
246 | return(0); | |
247 | } | |
248 | ||
249 | /* | |
250 | * If root is removing a file on the local machine, allow it. | |
4d4caa50 RC |
251 | * If root is removing a file from a remote machine, only allow |
252 | * files sent from the remote machine to be removed. | |
ccbfa562 RC |
253 | * Normal users can only remove the file from where it was sent. |
254 | */ | |
255 | isowner(owner, file) | |
256 | char *owner, *file; | |
257 | { | |
4d4caa50 RC |
258 | if (!strcmp(person, root) && (from == host || !strcmp(from, file+6))) |
259 | return(1); | |
260 | if (!strcmp(person, owner) && !strcmp(from, file+6)) | |
261 | return(1); | |
262 | if (from != host) | |
263 | printf("%s: ", host); | |
264 | printf("%s: Permission denied\n", file); | |
265 | return(0); | |
ccbfa562 RC |
266 | } |
267 | ||
268 | /* | |
269 | * Check to see if we are sending files to a remote machine. If we are, | |
270 | * then try removing files on the remote machine. | |
271 | */ | |
b5eb1530 | 272 | rmremote() |
ccbfa562 RC |
273 | { |
274 | register char *cp; | |
275 | register int i, rem; | |
276 | char buf[BUFSIZ]; | |
277 | ||
b5eb1530 | 278 | if (!sendtorem) |
ccbfa562 RC |
279 | return; /* not sending to a remote machine */ |
280 | ||
4d4caa50 RC |
281 | /* |
282 | * Flush stdout so the user can see what has been deleted | |
283 | * while we wait (possibly) for the connection. | |
284 | */ | |
285 | fflush(stdout); | |
286 | ||
ccbfa562 RC |
287 | sprintf(buf, "\5%s %s", RP, all ? "-all" : person); |
288 | cp = buf; | |
289 | for (i = 0; i < users; i++) { | |
290 | cp += strlen(cp); | |
291 | *cp++ = ' '; | |
292 | strcpy(cp, user[i]); | |
293 | } | |
294 | for (i = 0; i < requests; i++) { | |
295 | cp += strlen(cp); | |
296 | (void) sprintf(cp, " %d", requ[i]); | |
297 | } | |
298 | strcat(cp, "\n"); | |
a87bde97 | 299 | rem = getport(RM); |
ccbfa562 RC |
300 | if (rem < 0) { |
301 | if (from != host) | |
302 | printf("%s: ", host); | |
303 | printf("connection to %s is down\n", RM); | |
304 | } else { | |
305 | i = strlen(buf); | |
306 | if (write(rem, buf, i) != i) | |
307 | fatal("Lost connection"); | |
308 | while ((i = read(rem, buf, sizeof(buf))) > 0) | |
309 | (void) fwrite(buf, 1, i, stdout); | |
310 | (void) close(rem); | |
311 | } | |
312 | } | |
313 | ||
314 | /* | |
315 | * Return 1 if the filename begins with 'cf' | |
316 | */ | |
317 | iscf(d) | |
318 | struct direct *d; | |
319 | { | |
320 | return(d->d_name[0] == 'c' && d->d_name[1] == 'f'); | |
321 | } |