Commit | Line | Data |
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5f84f8f0 | 1 | #ifndef lint |
3d3c9f9f | 2 | static char sccsid[] = "@(#)rmjob.c 4.10 (Berkeley) %G%"; |
5f84f8f0 SL |
3 | #endif |
4 | ||
ccbfa562 RC |
5 | /* |
6 | * rmjob - remove the specified jobs from the queue. | |
7 | */ | |
8 | ||
9 | #include "lp.h" | |
10 | ||
11 | /* | |
12 | * Stuff for handling lprm specifications | |
13 | */ | |
14 | extern char *user[]; /* users to process */ | |
15 | extern int users; /* # of users in user array */ | |
16 | extern int requ[]; /* job number of spool entries */ | |
17 | extern int requests; /* # of spool requests */ | |
54266d1f | 18 | extern char *person; /* name of person doing lprm */ |
ccbfa562 | 19 | |
3d3c9f9f RC |
20 | char root[] = "root"; |
21 | int all = 0; /* eliminate all files (root only) */ | |
22 | int cur_daemon; /* daemon's pid */ | |
23 | char current[40]; /* active control file name */ | |
ccbfa562 RC |
24 | |
25 | int iscf(); | |
26 | ||
27 | rmjob() | |
28 | { | |
29 | register int i, nitems; | |
30 | int assasinated = 0; | |
31 | struct direct **files; | |
32 | ||
ccbfa562 RC |
33 | if ((i = pgetent(line, printer)) < 0) |
34 | fatal("cannot open printer description file"); | |
35 | else if (i == 0) | |
36 | fatal("unknown printer"); | |
37 | if ((SD = pgetstr("sd", &bp)) == NULL) | |
38 | SD = DEFSPOOL; | |
39 | if ((LO = pgetstr("lo", &bp)) == NULL) | |
40 | LO = DEFLOCK; | |
41 | if ((LP = pgetstr("lp", &bp)) == NULL) | |
42 | LP = DEFDEVLP; | |
43 | if ((RP = pgetstr("rp", &bp)) == NULL) | |
4d4caa50 | 44 | RP = DEFLP; |
a87bde97 | 45 | RM = pgetstr("rm", &bp); |
ccbfa562 RC |
46 | |
47 | /* | |
48 | * If the format was `lprm -' and the user isn't the super-user, | |
49 | * then fake things to look like he said `lprm user'. | |
50 | */ | |
51 | if (users < 0) { | |
52 | if (getuid() == 0) | |
53 | all = 1; /* all files in local queue */ | |
54 | else { | |
55 | user[0] = person; | |
56 | users = 1; | |
57 | } | |
58 | } | |
59 | if (!strcmp(person, "-all")) { | |
60 | if (from == host) | |
61 | fatal("The login name \"-all\" is reserved"); | |
62 | all = 1; /* all those from 'from' */ | |
63 | person = root; | |
64 | } | |
65 | ||
66 | if (chdir(SD) < 0) | |
67 | fatal("cannot chdir to spool directory"); | |
68 | if ((nitems = scandir(".", &files, iscf, NULL)) < 0) | |
69 | fatal("cannot access spool directory"); | |
70 | ||
71 | if (nitems) { | |
72 | /* | |
73 | * Check for an active printer daemon (in which case we | |
74 | * kill it if it is reading our file) then remove stuff | |
75 | * (after which we have to restart the daemon). | |
76 | */ | |
77 | if (lockchk(LO) && chk(current)) { | |
78 | assasinated = kill(cur_daemon, SIGINT) == 0; | |
79 | if (!assasinated) | |
80 | fatal("cannot kill printer daemon"); | |
81 | } | |
82 | /* | |
83 | * process the files | |
84 | */ | |
85 | for (i = 0; i < nitems; i++) | |
86 | process(files[i]->d_name); | |
87 | } | |
88 | chkremote(); | |
89 | /* | |
90 | * Restart the printer daemon if it was killed | |
91 | */ | |
775e8534 | 92 | if (assasinated && !startdaemon(printer)) |
ccbfa562 RC |
93 | fatal("cannot restart printer daemon\n"); |
94 | exit(0); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Process a lock file: collect the pid of the active | |
99 | * daemon and the file name of the active spool entry. | |
100 | * Return boolean indicating existence of a lock file. | |
101 | */ | |
102 | lockchk(s) | |
103 | char *s; | |
104 | { | |
105 | register FILE *fp; | |
106 | register int i, n; | |
107 | ||
108 | if ((fp = fopen(s, "r")) == NULL) | |
109 | if (errno == EACCES) | |
110 | fatal("can't access lock file"); | |
111 | else | |
112 | return(0); | |
8fed920b | 113 | if (!getline(fp)) { |
ccbfa562 RC |
114 | (void) fclose(fp); |
115 | return(0); /* no daemon present */ | |
116 | } | |
117 | cur_daemon = atoi(line); | |
8fed920b RC |
118 | if (kill(cur_daemon, 0) < 0) { |
119 | (void) fclose(fp); | |
120 | return(0); /* no daemon present */ | |
121 | } | |
ccbfa562 | 122 | for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) { |
a87bde97 | 123 | if (i > 5) { |
ccbfa562 RC |
124 | n = 1; |
125 | break; | |
126 | } | |
127 | sleep(i); | |
128 | } | |
129 | current[n-1] = '\0'; | |
130 | (void) fclose(fp); | |
131 | return(1); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Process a control file. | |
136 | */ | |
137 | process(file) | |
138 | char *file; | |
139 | { | |
140 | FILE *cfp; | |
141 | ||
142 | if (!chk(file)) | |
143 | return; | |
144 | if ((cfp = fopen(file, "r")) == NULL) | |
145 | fatal("cannot open %s", file); | |
3d3c9f9f | 146 | while (getline(cfp)) { |
ccbfa562 RC |
147 | switch (line[0]) { |
148 | case 'U': /* unlink associated files */ | |
149 | if (from != host) | |
150 | printf("%s: ", host); | |
151 | printf(unlink(line+1) ? "cannot dequeue %s\n" : | |
152 | "%s dequeued\n", line+1); | |
153 | } | |
154 | } | |
155 | (void) fclose(cfp); | |
156 | if (from != host) | |
157 | printf("%s: ", host); | |
158 | printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file); | |
159 | } | |
160 | ||
161 | /* | |
162 | * Do the dirty work in checking | |
163 | */ | |
164 | chk(file) | |
165 | char *file; | |
166 | { | |
167 | register int *r, n; | |
168 | register char **u, *cp; | |
169 | FILE *cfp; | |
170 | ||
139505f2 RC |
171 | /* |
172 | * Check for valid cf file name (mostly checking current). | |
173 | */ | |
174 | if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f') | |
175 | return(0); | |
176 | ||
ccbfa562 RC |
177 | if (all && (from == host || !strcmp(from, file+6))) |
178 | return(1); | |
179 | ||
180 | /* | |
181 | * get the owner's name from the control file. | |
182 | */ | |
183 | if ((cfp = fopen(file, "r")) == NULL) | |
184 | return(0); | |
185 | while (getline(cfp)) { | |
186 | if (line[0] == 'P') | |
187 | break; | |
188 | } | |
189 | (void) fclose(cfp); | |
190 | if (line[0] != 'P') | |
191 | return(0); | |
192 | ||
193 | if (users == 0 && requests == 0) | |
194 | return(!strcmp(file, current) && isowner(line+1, file)); | |
195 | /* | |
196 | * Check the request list | |
197 | */ | |
198 | for (n = 0, cp = file+3; isdigit(*cp); ) | |
199 | n = n * 10 + (*cp++ - '0'); | |
200 | for (r = requ; r < &requ[requests]; r++) | |
201 | if (*r == n && isowner(line+1, file)) | |
202 | return(1); | |
203 | /* | |
204 | * Check to see if it's in the user list | |
205 | */ | |
206 | for (u = user; u < &user[users]; u++) | |
207 | if (!strcmp(*u, line+1) && isowner(line+1, file)) | |
208 | return(1); | |
209 | return(0); | |
210 | } | |
211 | ||
212 | /* | |
213 | * If root is removing a file on the local machine, allow it. | |
4d4caa50 RC |
214 | * If root is removing a file from a remote machine, only allow |
215 | * files sent from the remote machine to be removed. | |
ccbfa562 RC |
216 | * Normal users can only remove the file from where it was sent. |
217 | */ | |
218 | isowner(owner, file) | |
219 | char *owner, *file; | |
220 | { | |
4d4caa50 RC |
221 | if (!strcmp(person, root) && (from == host || !strcmp(from, file+6))) |
222 | return(1); | |
223 | if (!strcmp(person, owner) && !strcmp(from, file+6)) | |
224 | return(1); | |
225 | if (from != host) | |
226 | printf("%s: ", host); | |
227 | printf("%s: Permission denied\n", file); | |
228 | return(0); | |
ccbfa562 RC |
229 | } |
230 | ||
231 | /* | |
232 | * Check to see if we are sending files to a remote machine. If we are, | |
233 | * then try removing files on the remote machine. | |
234 | */ | |
235 | chkremote() | |
236 | { | |
237 | register char *cp; | |
238 | register int i, rem; | |
239 | char buf[BUFSIZ]; | |
240 | ||
241 | if (*LP || RM == NULL) | |
242 | return; /* not sending to a remote machine */ | |
243 | ||
4d4caa50 RC |
244 | /* |
245 | * Flush stdout so the user can see what has been deleted | |
246 | * while we wait (possibly) for the connection. | |
247 | */ | |
248 | fflush(stdout); | |
249 | ||
ccbfa562 RC |
250 | sprintf(buf, "\5%s %s", RP, all ? "-all" : person); |
251 | cp = buf; | |
252 | for (i = 0; i < users; i++) { | |
253 | cp += strlen(cp); | |
254 | *cp++ = ' '; | |
255 | strcpy(cp, user[i]); | |
256 | } | |
257 | for (i = 0; i < requests; i++) { | |
258 | cp += strlen(cp); | |
259 | (void) sprintf(cp, " %d", requ[i]); | |
260 | } | |
261 | strcat(cp, "\n"); | |
a87bde97 | 262 | rem = getport(RM); |
ccbfa562 RC |
263 | if (rem < 0) { |
264 | if (from != host) | |
265 | printf("%s: ", host); | |
266 | printf("connection to %s is down\n", RM); | |
267 | } else { | |
268 | i = strlen(buf); | |
269 | if (write(rem, buf, i) != i) | |
270 | fatal("Lost connection"); | |
271 | while ((i = read(rem, buf, sizeof(buf))) > 0) | |
272 | (void) fwrite(buf, 1, i, stdout); | |
273 | (void) close(rem); | |
274 | } | |
275 | } | |
276 | ||
277 | /* | |
278 | * Return 1 if the filename begins with 'cf' | |
279 | */ | |
280 | iscf(d) | |
281 | struct direct *d; | |
282 | { | |
283 | return(d->d_name[0] == 'c' && d->d_name[1] == 'f'); | |
284 | } |