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d0aeaf5a | 1 | /* |
f7840ad0 KB |
2 | * Copyright (c) 1983, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
9d85c861 | 4 | * |
c61e0514 | 5 | * |
c13032d6 | 6 | * %sccs.include.redist.c% |
d0aeaf5a DF |
7 | */ |
8 | ||
5f84f8f0 | 9 | #ifndef lint |
2e709bb2 | 10 | static char copyright[] = |
f7840ad0 KB |
11 | "@(#) Copyright (c) 1983, 1993\n\ |
12 | The Regents of the University of California. All rights reserved.\n"; | |
c13032d6 EA |
13 | #endif /* not lint */ |
14 | ||
15 | #ifndef lint | |
f7840ad0 | 16 | static char sccsid[] = "@(#)recvjob.c 8.1 (Berkeley) %G%"; |
9d85c861 | 17 | #endif /* not lint */ |
5f84f8f0 | 18 | |
e3127271 RC |
19 | /* |
20 | * Receive printer jobs from the network, queue them and | |
21 | * start the printer daemon. | |
22 | */ | |
34c0890f KB |
23 | #include <sys/param.h> |
24 | #include <sys/mount.h> | |
25 | #include <sys/stat.h> | |
e3127271 | 26 | |
c61e0514 | 27 | #include <unistd.h> |
34c0890f KB |
28 | #include <signal.h> |
29 | #include <fcntl.h> | |
30 | #include <dirent.h> | |
31 | #include <syslog.h> | |
32 | #include <stdio.h> | |
c61e0514 EA |
33 | #include <stdlib.h> |
34 | #include <string.h> | |
e3127271 | 35 | #include "lp.h" |
34c0890f KB |
36 | #include "lp.local.h" |
37 | #include "extern.h" | |
7abf8d65 | 38 | #include "pathnames.h" |
e3127271 | 39 | |
47f0387b RC |
40 | #define ack() (void) write(1, sp, 1); |
41 | ||
c61e0514 EA |
42 | static char dfname[40]; /* data files */ |
43 | static int minfree; /* keep at least minfree blocks available */ | |
44 | static char *sp = ""; | |
45 | static char tfname[40]; /* tmp copy of cf before linking */ | |
47f0387b | 46 | |
34c0890f KB |
47 | static int chksize __P((int)); |
48 | static void frecverr __P((const char *, ...)); | |
c61e0514 | 49 | static int noresponse __P((void)); |
34c0890f | 50 | static void rcleanup __P((int)); |
c61e0514 EA |
51 | static int read_number __P((char *)); |
52 | static int readfile __P((char *, int)); | |
53 | static int readjob __P((void)); | |
34c0890f | 54 | |
e3127271 | 55 | |
c61e0514 | 56 | void |
e3127271 RC |
57 | recvjob() |
58 | { | |
88f026f7 | 59 | struct stat stb; |
b681f416 | 60 | int status; |
e3127271 | 61 | |
e3127271 RC |
62 | /* |
63 | * Perform lookup for printer name or abbreviation | |
64 | */ | |
c61e0514 | 65 | if ((status = cgetent(&bp, printcapdb, printer)) == -2) |
47f0387b | 66 | frecverr("cannot open printer description file"); |
c61e0514 | 67 | else if (status == -1) |
47f0387b | 68 | frecverr("unknown printer %s", printer); |
c61e0514 EA |
69 | else if (status == -3) |
70 | fatal("potential reference loop detected in printcap file"); | |
71 | ||
72 | if (cgetstr(bp, "lf", &LF) == -1) | |
7abf8d65 | 73 | LF = _PATH_CONSOLE; |
c61e0514 | 74 | if (cgetstr(bp, "sd", &SD) == -1) |
7abf8d65 | 75 | SD = _PATH_DEFSPOOL; |
c61e0514 | 76 | if (cgetstr(bp, "lo", &LO) == -1) |
88f026f7 | 77 | LO = DEFLOCK; |
e3127271 | 78 | |
4e7bc1ec EA |
79 | (void) close(2); /* set up log file */ |
80 | if (open(LF, O_WRONLY|O_APPEND, 0664) < 0) { | |
81 | syslog(LOG_ERR, "%s: %m", LF); | |
7abf8d65 | 82 | (void) open(_PATH_DEVNULL, O_WRONLY); |
4e7bc1ec EA |
83 | } |
84 | ||
e3127271 | 85 | if (chdir(SD) < 0) |
47f0387b RC |
86 | frecverr("%s: %s: %m", printer, SD); |
87 | if (stat(LO, &stb) == 0) { | |
88 | if (stb.st_mode & 010) { | |
89 | /* queue is disabled */ | |
90 | putchar('\1'); /* return error code */ | |
91 | exit(1); | |
92 | } | |
93 | } else if (stat(SD, &stb) < 0) | |
94 | frecverr("%s: %s: %m", printer, SD); | |
40192b67 | 95 | minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */ |
47f0387b RC |
96 | signal(SIGTERM, rcleanup); |
97 | signal(SIGPIPE, rcleanup); | |
e3127271 RC |
98 | |
99 | if (readjob()) | |
100 | printjob(); | |
101 | } | |
102 | ||
e3127271 RC |
103 | /* |
104 | * Read printer jobs sent by lpd and copy them to the spooling directory. | |
105 | * Return the number of jobs successfully transfered. | |
106 | */ | |
34c0890f | 107 | static int |
47f0387b | 108 | readjob() |
e3127271 RC |
109 | { |
110 | register int size, nfiles; | |
111 | register char *cp; | |
112 | ||
113 | ack(); | |
114 | nfiles = 0; | |
115 | for (;;) { | |
116 | /* | |
117 | * Read a command to tell us what to do | |
118 | */ | |
119 | cp = line; | |
120 | do { | |
121 | if ((size = read(1, cp, 1)) != 1) { | |
122 | if (size < 0) | |
47f0387b | 123 | frecverr("%s: Lost connection",printer); |
e3127271 RC |
124 | return(nfiles); |
125 | } | |
126 | } while (*cp++ != '\n'); | |
127 | *--cp = '\0'; | |
128 | cp = line; | |
129 | switch (*cp++) { | |
130 | case '\1': /* cleanup because data sent was bad */ | |
34c0890f | 131 | rcleanup(0); |
e3127271 RC |
132 | continue; |
133 | ||
134 | case '\2': /* read cf file */ | |
135 | size = 0; | |
136 | while (*cp >= '0' && *cp <= '9') | |
137 | size = size * 10 + (*cp++ - '0'); | |
138 | if (*cp++ != ' ') | |
139 | break; | |
dda5ffcd JB |
140 | /* |
141 | * host name has been authenticated, we use our | |
142 | * view of the host name since we may be passed | |
143 | * something different than what gethostbyaddr() | |
144 | * returns | |
145 | */ | |
146 | strcpy(cp + 6, from); | |
e3127271 RC |
147 | strcpy(tfname, cp); |
148 | tfname[0] = 't'; | |
47f0387b RC |
149 | if (!chksize(size)) { |
150 | (void) write(1, "\2", 1); | |
151 | continue; | |
152 | } | |
e3127271 | 153 | if (!readfile(tfname, size)) { |
34c0890f | 154 | rcleanup(0); |
e3127271 RC |
155 | continue; |
156 | } | |
157 | if (link(tfname, cp) < 0) | |
47f0387b | 158 | frecverr("%s: %m", tfname); |
e3127271 RC |
159 | (void) unlink(tfname); |
160 | tfname[0] = '\0'; | |
161 | nfiles++; | |
162 | continue; | |
163 | ||
164 | case '\3': /* read df file */ | |
165 | size = 0; | |
166 | while (*cp >= '0' && *cp <= '9') | |
167 | size = size * 10 + (*cp++ - '0'); | |
168 | if (*cp++ != ' ') | |
169 | break; | |
47f0387b RC |
170 | if (!chksize(size)) { |
171 | (void) write(1, "\2", 1); | |
172 | continue; | |
173 | } | |
3066c9a6 KB |
174 | (void) strcpy(dfname, cp); |
175 | if (index(dfname, '/')) | |
c3c382e9 KM |
176 | frecverr("readjob: %s: illegal path name", |
177 | dfname); | |
666561d4 | 178 | (void) readfile(dfname, size); |
e3127271 RC |
179 | continue; |
180 | } | |
1d3cf5d3 | 181 | frecverr("protocol screwup: %s", line); |
e3127271 RC |
182 | } |
183 | } | |
184 | ||
185 | /* | |
186 | * Read files send by lpd and copy them to the spooling directory. | |
187 | */ | |
34c0890f | 188 | static int |
e3127271 RC |
189 | readfile(file, size) |
190 | char *file; | |
191 | int size; | |
192 | { | |
193 | register char *cp; | |
194 | char buf[BUFSIZ]; | |
195 | register int i, j, amt; | |
196 | int fd, err; | |
197 | ||
40192b67 | 198 | fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD); |
e3127271 | 199 | if (fd < 0) |
c3c382e9 | 200 | frecverr("readfile: %s: illegal path name: %m", file); |
e3127271 RC |
201 | ack(); |
202 | err = 0; | |
203 | for (i = 0; i < size; i += BUFSIZ) { | |
204 | amt = BUFSIZ; | |
205 | cp = buf; | |
206 | if (i + amt > size) | |
207 | amt = size - i; | |
208 | do { | |
209 | j = read(1, cp, amt); | |
210 | if (j <= 0) | |
47f0387b | 211 | frecverr("Lost connection"); |
e3127271 RC |
212 | amt -= j; |
213 | cp += j; | |
214 | } while (amt > 0); | |
215 | amt = BUFSIZ; | |
216 | if (i + amt > size) | |
217 | amt = size - i; | |
c6d1c018 | 218 | if (write(fd, buf, amt) != amt) { |
e3127271 | 219 | err++; |
c6d1c018 RC |
220 | break; |
221 | } | |
e3127271 RC |
222 | } |
223 | (void) close(fd); | |
224 | if (err) | |
47f0387b | 225 | frecverr("%s: write error", file); |
e3127271 RC |
226 | if (noresponse()) { /* file sent had bad data in it */ |
227 | (void) unlink(file); | |
228 | return(0); | |
229 | } | |
230 | ack(); | |
231 | return(1); | |
232 | } | |
233 | ||
34c0890f | 234 | static int |
e3127271 RC |
235 | noresponse() |
236 | { | |
237 | char resp; | |
238 | ||
239 | if (read(1, &resp, 1) != 1) | |
47f0387b | 240 | frecverr("Lost connection"); |
e3127271 RC |
241 | if (resp == '\0') |
242 | return(0); | |
243 | return(1); | |
244 | } | |
245 | ||
47f0387b RC |
246 | /* |
247 | * Check to see if there is enough space on the disk for size bytes. | |
248 | * 1 == OK, 0 == Not OK. | |
249 | */ | |
34c0890f | 250 | static int |
47f0387b RC |
251 | chksize(size) |
252 | int size; | |
253 | { | |
47f0387b | 254 | int spacefree; |
40192b67 | 255 | struct statfs sfb; |
47f0387b | 256 | |
40192b67 KM |
257 | if (statfs(".", &sfb) < 0) { |
258 | syslog(LOG_ERR, "%s: %m", "statfs(\".\")"); | |
259 | return (1); | |
260 | } | |
78c3ee49 | 261 | spacefree = sfb.f_bavail * (sfb.f_bsize / 512); |
40192b67 | 262 | size = (size + 511) / 512; |
47f0387b RC |
263 | if (minfree + size > spacefree) |
264 | return(0); | |
265 | return(1); | |
266 | } | |
267 | ||
34c0890f | 268 | static int |
47f0387b RC |
269 | read_number(fn) |
270 | char *fn; | |
271 | { | |
272 | char lin[80]; | |
273 | register FILE *fp; | |
274 | ||
275 | if ((fp = fopen(fn, "r")) == NULL) | |
276 | return (0); | |
277 | if (fgets(lin, 80, fp) == NULL) { | |
278 | fclose(fp); | |
279 | return (0); | |
280 | } | |
281 | fclose(fp); | |
282 | return (atoi(lin)); | |
283 | } | |
284 | ||
e3127271 RC |
285 | /* |
286 | * Remove all the files associated with the current job being transfered. | |
287 | */ | |
34c0890f KB |
288 | static void |
289 | rcleanup(signo) | |
290 | int signo; | |
e3127271 | 291 | { |
e3127271 RC |
292 | if (tfname[0]) |
293 | (void) unlink(tfname); | |
666561d4 | 294 | if (dfname[0]) |
e3127271 RC |
295 | do { |
296 | do | |
297 | (void) unlink(dfname); | |
0b551c43 RC |
298 | while (dfname[2]-- != 'A'); |
299 | dfname[2] = 'z'; | |
300 | } while (dfname[0]-- != 'd'); | |
666561d4 | 301 | dfname[0] = '\0'; |
e3127271 RC |
302 | } |
303 | ||
34c0890f KB |
304 | #if __STDC__ |
305 | #include <stdarg.h> | |
306 | #else | |
307 | #include <varargs.h> | |
308 | #endif | |
309 | ||
310 | static void | |
311 | #if __STDC__ | |
312 | frecverr(const char *msg, ...) | |
313 | #else | |
314 | frecverr(msg, va_alist) | |
e3127271 | 315 | char *msg; |
34c0890f KB |
316 | va_dcl |
317 | #endif | |
e3127271 | 318 | { |
1d3cf5d3 | 319 | extern char *fromb; |
34c0890f KB |
320 | va_list ap; |
321 | #if __STDC__ | |
322 | va_start(ap, msg); | |
323 | #else | |
324 | va_start(ap); | |
325 | #endif | |
326 | rcleanup(0); | |
1d3cf5d3 | 327 | syslog(LOG_ERR, "%s", fromb); |
34c0890f KB |
328 | vsyslog(LOG_ERR, msg, ap); |
329 | va_end(ap); | |
e3127271 RC |
330 | putchar('\1'); /* return error code */ |
331 | exit(1); | |
332 | } |