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d0aeaf5a DF |
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 |
a399f6c8 | 19 | static char sccsid[] = "@(#)recvjob.c 5.7 (Berkeley) %G%"; |
9d85c861 | 20 | #endif /* not lint */ |
5f84f8f0 | 21 | |
e3127271 RC |
22 | /* |
23 | * Receive printer jobs from the network, queue them and | |
24 | * start the printer daemon. | |
25 | */ | |
26 | ||
27 | #include "lp.h" | |
47f0387b | 28 | #include <sys/fs.h> |
e3127271 | 29 | |
47f0387b RC |
30 | char *sp = ""; |
31 | #define ack() (void) write(1, sp, 1); | |
32 | ||
33 | char tfname[40]; /* tmp copy of cf before linking */ | |
666561d4 | 34 | char dfname[40]; /* data files */ |
47f0387b RC |
35 | int minfree; /* keep at least minfree blocks available */ |
36 | char *ddev; /* disk device (for checking free space) */ | |
37 | int dfd; /* file system device descriptor */ | |
38 | ||
39 | char *find_dev(); | |
e3127271 RC |
40 | |
41 | recvjob() | |
42 | { | |
88f026f7 | 43 | struct stat stb; |
e3127271 | 44 | char *bp = pbuf; |
47f0387b | 45 | int status, rcleanup(); |
e3127271 | 46 | |
e3127271 RC |
47 | /* |
48 | * Perform lookup for printer name or abbreviation | |
49 | */ | |
50 | if ((status = pgetent(line, printer)) < 0) | |
47f0387b | 51 | frecverr("cannot open printer description file"); |
e3127271 | 52 | else if (status == 0) |
47f0387b | 53 | frecverr("unknown printer %s", printer); |
e3127271 RC |
54 | if ((LF = pgetstr("lf", &bp)) == NULL) |
55 | LF = DEFLOGF; | |
56 | if ((SD = pgetstr("sd", &bp)) == NULL) | |
57 | SD = DEFSPOOL; | |
88f026f7 RC |
58 | if ((LO = pgetstr("lo", &bp)) == NULL) |
59 | LO = DEFLOCK; | |
e3127271 | 60 | |
4e7bc1ec EA |
61 | (void) close(2); /* set up log file */ |
62 | if (open(LF, O_WRONLY|O_APPEND, 0664) < 0) { | |
63 | syslog(LOG_ERR, "%s: %m", LF); | |
64 | (void) open("/dev/null", O_WRONLY); | |
65 | } | |
66 | ||
e3127271 | 67 | if (chdir(SD) < 0) |
47f0387b RC |
68 | frecverr("%s: %s: %m", printer, SD); |
69 | if (stat(LO, &stb) == 0) { | |
70 | if (stb.st_mode & 010) { | |
71 | /* queue is disabled */ | |
72 | putchar('\1'); /* return error code */ | |
73 | exit(1); | |
74 | } | |
75 | } else if (stat(SD, &stb) < 0) | |
76 | frecverr("%s: %s: %m", printer, SD); | |
77 | minfree = read_number("minfree"); | |
78 | ddev = find_dev(stb.st_dev, S_IFBLK); | |
79 | if ((dfd = open(ddev, O_RDONLY)) < 0) | |
80 | syslog(LOG_WARNING, "%s: %s: %m", printer, ddev); | |
81 | signal(SIGTERM, rcleanup); | |
82 | signal(SIGPIPE, rcleanup); | |
e3127271 RC |
83 | |
84 | if (readjob()) | |
85 | printjob(); | |
86 | } | |
87 | ||
47f0387b RC |
88 | char * |
89 | find_dev(dev, type) | |
90 | register dev_t dev; | |
91 | register int type; | |
92 | { | |
93 | register DIR *dfd = opendir("/dev"); | |
94 | struct direct *dir; | |
95 | struct stat stb; | |
96 | char devname[MAXNAMLEN+6]; | |
97 | char *dp; | |
98 | ||
99 | strcpy(devname, "/dev/"); | |
100 | while ((dir = readdir(dfd))) { | |
101 | strcpy(devname + 5, dir->d_name); | |
102 | if (stat(devname, &stb)) | |
103 | continue; | |
104 | if ((stb.st_mode & S_IFMT) != type) | |
105 | continue; | |
106 | if (dev == stb.st_rdev) { | |
107 | closedir(dfd); | |
108 | dp = (char *)malloc(strlen(devname)+1); | |
109 | strcpy(dp, devname); | |
110 | return(dp); | |
111 | } | |
112 | } | |
113 | closedir(dfd); | |
114 | frecverr("cannot find device %d, %d", major(dev), minor(dev)); | |
115 | /*NOTREACHED*/ | |
116 | } | |
e3127271 RC |
117 | |
118 | /* | |
119 | * Read printer jobs sent by lpd and copy them to the spooling directory. | |
120 | * Return the number of jobs successfully transfered. | |
121 | */ | |
47f0387b | 122 | readjob() |
e3127271 RC |
123 | { |
124 | register int size, nfiles; | |
125 | register char *cp; | |
126 | ||
127 | ack(); | |
128 | nfiles = 0; | |
129 | for (;;) { | |
130 | /* | |
131 | * Read a command to tell us what to do | |
132 | */ | |
133 | cp = line; | |
134 | do { | |
135 | if ((size = read(1, cp, 1)) != 1) { | |
136 | if (size < 0) | |
47f0387b | 137 | frecverr("%s: Lost connection",printer); |
e3127271 RC |
138 | return(nfiles); |
139 | } | |
140 | } while (*cp++ != '\n'); | |
141 | *--cp = '\0'; | |
142 | cp = line; | |
143 | switch (*cp++) { | |
144 | case '\1': /* cleanup because data sent was bad */ | |
47f0387b | 145 | rcleanup(); |
e3127271 RC |
146 | continue; |
147 | ||
148 | case '\2': /* read cf file */ | |
149 | size = 0; | |
150 | while (*cp >= '0' && *cp <= '9') | |
151 | size = size * 10 + (*cp++ - '0'); | |
152 | if (*cp++ != ' ') | |
153 | break; | |
dda5ffcd JB |
154 | /* |
155 | * host name has been authenticated, we use our | |
156 | * view of the host name since we may be passed | |
157 | * something different than what gethostbyaddr() | |
158 | * returns | |
159 | */ | |
160 | strcpy(cp + 6, from); | |
e3127271 RC |
161 | strcpy(tfname, cp); |
162 | tfname[0] = 't'; | |
47f0387b RC |
163 | if (!chksize(size)) { |
164 | (void) write(1, "\2", 1); | |
165 | continue; | |
166 | } | |
e3127271 | 167 | if (!readfile(tfname, size)) { |
47f0387b | 168 | rcleanup(); |
e3127271 RC |
169 | continue; |
170 | } | |
171 | if (link(tfname, cp) < 0) | |
47f0387b | 172 | frecverr("%s: %m", tfname); |
e3127271 RC |
173 | (void) unlink(tfname); |
174 | tfname[0] = '\0'; | |
175 | nfiles++; | |
176 | continue; | |
177 | ||
178 | case '\3': /* read df file */ | |
179 | size = 0; | |
180 | while (*cp >= '0' && *cp <= '9') | |
181 | size = size * 10 + (*cp++ - '0'); | |
182 | if (*cp++ != ' ') | |
183 | break; | |
47f0387b RC |
184 | if (!chksize(size)) { |
185 | (void) write(1, "\2", 1); | |
186 | continue; | |
187 | } | |
666561d4 KM |
188 | strcpy(dfname, cp); |
189 | (void) readfile(dfname, size); | |
e3127271 RC |
190 | continue; |
191 | } | |
47f0387b | 192 | frecverr("protocol screwup"); |
e3127271 RC |
193 | } |
194 | } | |
195 | ||
196 | /* | |
197 | * Read files send by lpd and copy them to the spooling directory. | |
198 | */ | |
199 | readfile(file, size) | |
200 | char *file; | |
201 | int size; | |
202 | { | |
203 | register char *cp; | |
204 | char buf[BUFSIZ]; | |
205 | register int i, j, amt; | |
206 | int fd, err; | |
207 | ||
adec4d9e | 208 | fd = open(file, O_WRONLY|O_CREAT, FILMOD); |
e3127271 | 209 | if (fd < 0) |
47f0387b | 210 | frecverr("%s: %m", file); |
e3127271 RC |
211 | ack(); |
212 | err = 0; | |
213 | for (i = 0; i < size; i += BUFSIZ) { | |
214 | amt = BUFSIZ; | |
215 | cp = buf; | |
216 | if (i + amt > size) | |
217 | amt = size - i; | |
218 | do { | |
219 | j = read(1, cp, amt); | |
220 | if (j <= 0) | |
47f0387b | 221 | frecverr("Lost connection"); |
e3127271 RC |
222 | amt -= j; |
223 | cp += j; | |
224 | } while (amt > 0); | |
225 | amt = BUFSIZ; | |
226 | if (i + amt > size) | |
227 | amt = size - i; | |
c6d1c018 | 228 | if (write(fd, buf, amt) != amt) { |
e3127271 | 229 | err++; |
c6d1c018 RC |
230 | break; |
231 | } | |
e3127271 RC |
232 | } |
233 | (void) close(fd); | |
234 | if (err) | |
47f0387b | 235 | frecverr("%s: write error", file); |
e3127271 RC |
236 | if (noresponse()) { /* file sent had bad data in it */ |
237 | (void) unlink(file); | |
238 | return(0); | |
239 | } | |
240 | ack(); | |
241 | return(1); | |
242 | } | |
243 | ||
e3127271 RC |
244 | noresponse() |
245 | { | |
246 | char resp; | |
247 | ||
248 | if (read(1, &resp, 1) != 1) | |
47f0387b | 249 | frecverr("Lost connection"); |
e3127271 RC |
250 | if (resp == '\0') |
251 | return(0); | |
252 | return(1); | |
253 | } | |
254 | ||
47f0387b RC |
255 | /* |
256 | * Check to see if there is enough space on the disk for size bytes. | |
257 | * 1 == OK, 0 == Not OK. | |
258 | */ | |
259 | chksize(size) | |
260 | int size; | |
261 | { | |
262 | struct stat stb; | |
263 | register char *ddev; | |
264 | int spacefree; | |
265 | struct fs fs; | |
266 | ||
6d011afb | 267 | if (dfd < 0 || lseek(dfd, (long)(SBOFF), 0) < 0) |
47f0387b RC |
268 | return(1); |
269 | if (read(dfd, (char *)&fs, sizeof fs) != sizeof fs) | |
270 | return(1); | |
6d011afb | 271 | spacefree = freespace(&fs, fs.fs_minfree) * fs.fs_fsize / 1024; |
47f0387b RC |
272 | size = (size + 1023) / 1024; |
273 | if (minfree + size > spacefree) | |
274 | return(0); | |
275 | return(1); | |
276 | } | |
277 | ||
278 | read_number(fn) | |
279 | char *fn; | |
280 | { | |
281 | char lin[80]; | |
282 | register FILE *fp; | |
283 | ||
284 | if ((fp = fopen(fn, "r")) == NULL) | |
285 | return (0); | |
286 | if (fgets(lin, 80, fp) == NULL) { | |
287 | fclose(fp); | |
288 | return (0); | |
289 | } | |
290 | fclose(fp); | |
291 | return (atoi(lin)); | |
292 | } | |
293 | ||
e3127271 RC |
294 | /* |
295 | * Remove all the files associated with the current job being transfered. | |
296 | */ | |
47f0387b | 297 | rcleanup() |
e3127271 | 298 | { |
e3127271 RC |
299 | |
300 | if (tfname[0]) | |
301 | (void) unlink(tfname); | |
666561d4 | 302 | if (dfname[0]) |
e3127271 RC |
303 | do { |
304 | do | |
305 | (void) unlink(dfname); | |
0b551c43 RC |
306 | while (dfname[2]-- != 'A'); |
307 | dfname[2] = 'z'; | |
308 | } while (dfname[0]-- != 'd'); | |
666561d4 | 309 | dfname[0] = '\0'; |
e3127271 RC |
310 | } |
311 | ||
47f0387b | 312 | frecverr(msg, a1, a2) |
e3127271 RC |
313 | char *msg; |
314 | { | |
47f0387b RC |
315 | rcleanup(); |
316 | syslog(LOG_ERR, msg, a1, a2); | |
e3127271 RC |
317 | putchar('\1'); /* return error code */ |
318 | exit(1); | |
319 | } |