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d0aeaf5a DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
9d85c861 KB |
3 | * All rights reserved. |
4 | * | |
417f7a11 | 5 | * %sccs.include.redist.c% |
d0aeaf5a DF |
6 | */ |
7 | ||
5f84f8f0 | 8 | #ifndef lint |
34c0890f | 9 | static char sccsid[] = "@(#)recvjob.c 5.17 (Berkeley) %G%"; |
9d85c861 | 10 | #endif /* not lint */ |
5f84f8f0 | 11 | |
e3127271 RC |
12 | /* |
13 | * Receive printer jobs from the network, queue them and | |
14 | * start the printer daemon. | |
15 | */ | |
34c0890f KB |
16 | #include <sys/param.h> |
17 | #include <sys/mount.h> | |
18 | #include <sys/stat.h> | |
e3127271 | 19 | |
34c0890f KB |
20 | #include <signal.h> |
21 | #include <fcntl.h> | |
22 | #include <dirent.h> | |
23 | #include <syslog.h> | |
24 | #include <stdio.h> | |
e3127271 | 25 | #include "lp.h" |
34c0890f KB |
26 | #include "lp.local.h" |
27 | #include "extern.h" | |
7abf8d65 | 28 | #include "pathnames.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 | 35 | int minfree; /* keep at least minfree blocks available */ |
47f0387b | 36 | |
34c0890f KB |
37 | static int readjob __P((void)); |
38 | static int readfile __P((char *, int)); | |
39 | static int noresponse __P((void)); | |
40 | static int chksize __P((int)); | |
41 | static void frecverr __P((const char *, ...)); | |
42 | static int read_number __P((char *)); | |
43 | static void rcleanup __P((int)); | |
44 | ||
e3127271 | 45 | |
34c0890f | 46 | int |
e3127271 RC |
47 | recvjob() |
48 | { | |
88f026f7 | 49 | struct stat stb; |
e3127271 | 50 | char *bp = pbuf; |
b681f416 | 51 | int status; |
e3127271 | 52 | |
e3127271 RC |
53 | /* |
54 | * Perform lookup for printer name or abbreviation | |
55 | */ | |
56 | if ((status = pgetent(line, printer)) < 0) | |
47f0387b | 57 | frecverr("cannot open printer description file"); |
e3127271 | 58 | else if (status == 0) |
47f0387b | 59 | frecverr("unknown printer %s", printer); |
e3127271 | 60 | if ((LF = pgetstr("lf", &bp)) == NULL) |
7abf8d65 | 61 | LF = _PATH_CONSOLE; |
e3127271 | 62 | if ((SD = pgetstr("sd", &bp)) == NULL) |
7abf8d65 | 63 | SD = _PATH_DEFSPOOL; |
88f026f7 RC |
64 | if ((LO = pgetstr("lo", &bp)) == NULL) |
65 | LO = DEFLOCK; | |
e3127271 | 66 | |
4e7bc1ec EA |
67 | (void) close(2); /* set up log file */ |
68 | if (open(LF, O_WRONLY|O_APPEND, 0664) < 0) { | |
69 | syslog(LOG_ERR, "%s: %m", LF); | |
7abf8d65 | 70 | (void) open(_PATH_DEVNULL, O_WRONLY); |
4e7bc1ec EA |
71 | } |
72 | ||
e3127271 | 73 | if (chdir(SD) < 0) |
47f0387b RC |
74 | frecverr("%s: %s: %m", printer, SD); |
75 | if (stat(LO, &stb) == 0) { | |
76 | if (stb.st_mode & 010) { | |
77 | /* queue is disabled */ | |
78 | putchar('\1'); /* return error code */ | |
79 | exit(1); | |
80 | } | |
81 | } else if (stat(SD, &stb) < 0) | |
82 | frecverr("%s: %s: %m", printer, SD); | |
40192b67 | 83 | minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */ |
47f0387b RC |
84 | signal(SIGTERM, rcleanup); |
85 | signal(SIGPIPE, rcleanup); | |
e3127271 RC |
86 | |
87 | if (readjob()) | |
88 | printjob(); | |
89 | } | |
90 | ||
e3127271 RC |
91 | /* |
92 | * Read printer jobs sent by lpd and copy them to the spooling directory. | |
93 | * Return the number of jobs successfully transfered. | |
94 | */ | |
34c0890f | 95 | static int |
47f0387b | 96 | readjob() |
e3127271 RC |
97 | { |
98 | register int size, nfiles; | |
99 | register char *cp; | |
100 | ||
101 | ack(); | |
102 | nfiles = 0; | |
103 | for (;;) { | |
104 | /* | |
105 | * Read a command to tell us what to do | |
106 | */ | |
107 | cp = line; | |
108 | do { | |
109 | if ((size = read(1, cp, 1)) != 1) { | |
110 | if (size < 0) | |
47f0387b | 111 | frecverr("%s: Lost connection",printer); |
e3127271 RC |
112 | return(nfiles); |
113 | } | |
114 | } while (*cp++ != '\n'); | |
115 | *--cp = '\0'; | |
116 | cp = line; | |
117 | switch (*cp++) { | |
118 | case '\1': /* cleanup because data sent was bad */ | |
34c0890f | 119 | rcleanup(0); |
e3127271 RC |
120 | continue; |
121 | ||
122 | case '\2': /* read cf file */ | |
123 | size = 0; | |
124 | while (*cp >= '0' && *cp <= '9') | |
125 | size = size * 10 + (*cp++ - '0'); | |
126 | if (*cp++ != ' ') | |
127 | break; | |
dda5ffcd JB |
128 | /* |
129 | * host name has been authenticated, we use our | |
130 | * view of the host name since we may be passed | |
131 | * something different than what gethostbyaddr() | |
132 | * returns | |
133 | */ | |
134 | strcpy(cp + 6, from); | |
e3127271 RC |
135 | strcpy(tfname, cp); |
136 | tfname[0] = 't'; | |
47f0387b RC |
137 | if (!chksize(size)) { |
138 | (void) write(1, "\2", 1); | |
139 | continue; | |
140 | } | |
e3127271 | 141 | if (!readfile(tfname, size)) { |
34c0890f | 142 | rcleanup(0); |
e3127271 RC |
143 | continue; |
144 | } | |
145 | if (link(tfname, cp) < 0) | |
47f0387b | 146 | frecverr("%s: %m", tfname); |
e3127271 RC |
147 | (void) unlink(tfname); |
148 | tfname[0] = '\0'; | |
149 | nfiles++; | |
150 | continue; | |
151 | ||
152 | case '\3': /* read df file */ | |
153 | size = 0; | |
154 | while (*cp >= '0' && *cp <= '9') | |
155 | size = size * 10 + (*cp++ - '0'); | |
156 | if (*cp++ != ' ') | |
157 | break; | |
47f0387b RC |
158 | if (!chksize(size)) { |
159 | (void) write(1, "\2", 1); | |
160 | continue; | |
161 | } | |
3066c9a6 KB |
162 | (void) strcpy(dfname, cp); |
163 | if (index(dfname, '/')) | |
c3c382e9 KM |
164 | frecverr("readjob: %s: illegal path name", |
165 | dfname); | |
666561d4 | 166 | (void) readfile(dfname, size); |
e3127271 RC |
167 | continue; |
168 | } | |
47f0387b | 169 | frecverr("protocol screwup"); |
e3127271 RC |
170 | } |
171 | } | |
172 | ||
173 | /* | |
174 | * Read files send by lpd and copy them to the spooling directory. | |
175 | */ | |
34c0890f | 176 | static int |
e3127271 RC |
177 | readfile(file, size) |
178 | char *file; | |
179 | int size; | |
180 | { | |
181 | register char *cp; | |
182 | char buf[BUFSIZ]; | |
183 | register int i, j, amt; | |
184 | int fd, err; | |
185 | ||
40192b67 | 186 | fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD); |
e3127271 | 187 | if (fd < 0) |
c3c382e9 | 188 | frecverr("readfile: %s: illegal path name: %m", file); |
e3127271 RC |
189 | ack(); |
190 | err = 0; | |
191 | for (i = 0; i < size; i += BUFSIZ) { | |
192 | amt = BUFSIZ; | |
193 | cp = buf; | |
194 | if (i + amt > size) | |
195 | amt = size - i; | |
196 | do { | |
197 | j = read(1, cp, amt); | |
198 | if (j <= 0) | |
47f0387b | 199 | frecverr("Lost connection"); |
e3127271 RC |
200 | amt -= j; |
201 | cp += j; | |
202 | } while (amt > 0); | |
203 | amt = BUFSIZ; | |
204 | if (i + amt > size) | |
205 | amt = size - i; | |
c6d1c018 | 206 | if (write(fd, buf, amt) != amt) { |
e3127271 | 207 | err++; |
c6d1c018 RC |
208 | break; |
209 | } | |
e3127271 RC |
210 | } |
211 | (void) close(fd); | |
212 | if (err) | |
47f0387b | 213 | frecverr("%s: write error", file); |
e3127271 RC |
214 | if (noresponse()) { /* file sent had bad data in it */ |
215 | (void) unlink(file); | |
216 | return(0); | |
217 | } | |
218 | ack(); | |
219 | return(1); | |
220 | } | |
221 | ||
34c0890f | 222 | static int |
e3127271 RC |
223 | noresponse() |
224 | { | |
225 | char resp; | |
226 | ||
227 | if (read(1, &resp, 1) != 1) | |
47f0387b | 228 | frecverr("Lost connection"); |
e3127271 RC |
229 | if (resp == '\0') |
230 | return(0); | |
231 | return(1); | |
232 | } | |
233 | ||
47f0387b RC |
234 | /* |
235 | * Check to see if there is enough space on the disk for size bytes. | |
236 | * 1 == OK, 0 == Not OK. | |
237 | */ | |
34c0890f | 238 | static int |
47f0387b RC |
239 | chksize(size) |
240 | int size; | |
241 | { | |
47f0387b | 242 | int spacefree; |
40192b67 | 243 | struct statfs sfb; |
47f0387b | 244 | |
40192b67 KM |
245 | if (statfs(".", &sfb) < 0) { |
246 | syslog(LOG_ERR, "%s: %m", "statfs(\".\")"); | |
247 | return (1); | |
248 | } | |
78c3ee49 | 249 | spacefree = sfb.f_bavail * (sfb.f_bsize / 512); |
40192b67 | 250 | size = (size + 511) / 512; |
47f0387b RC |
251 | if (minfree + size > spacefree) |
252 | return(0); | |
253 | return(1); | |
254 | } | |
255 | ||
34c0890f | 256 | static int |
47f0387b RC |
257 | read_number(fn) |
258 | char *fn; | |
259 | { | |
260 | char lin[80]; | |
261 | register FILE *fp; | |
262 | ||
263 | if ((fp = fopen(fn, "r")) == NULL) | |
264 | return (0); | |
265 | if (fgets(lin, 80, fp) == NULL) { | |
266 | fclose(fp); | |
267 | return (0); | |
268 | } | |
269 | fclose(fp); | |
270 | return (atoi(lin)); | |
271 | } | |
272 | ||
e3127271 RC |
273 | /* |
274 | * Remove all the files associated with the current job being transfered. | |
275 | */ | |
34c0890f KB |
276 | static void |
277 | rcleanup(signo) | |
278 | int signo; | |
e3127271 | 279 | { |
e3127271 RC |
280 | if (tfname[0]) |
281 | (void) unlink(tfname); | |
666561d4 | 282 | if (dfname[0]) |
e3127271 RC |
283 | do { |
284 | do | |
285 | (void) unlink(dfname); | |
0b551c43 RC |
286 | while (dfname[2]-- != 'A'); |
287 | dfname[2] = 'z'; | |
288 | } while (dfname[0]-- != 'd'); | |
666561d4 | 289 | dfname[0] = '\0'; |
e3127271 RC |
290 | } |
291 | ||
34c0890f KB |
292 | #if __STDC__ |
293 | #include <stdarg.h> | |
294 | #else | |
295 | #include <varargs.h> | |
296 | #endif | |
297 | ||
298 | static void | |
299 | #if __STDC__ | |
300 | frecverr(const char *msg, ...) | |
301 | #else | |
302 | frecverr(msg, va_alist) | |
e3127271 | 303 | char *msg; |
34c0890f KB |
304 | va_dcl |
305 | #endif | |
e3127271 | 306 | { |
34c0890f KB |
307 | va_list ap; |
308 | #if __STDC__ | |
309 | va_start(ap, msg); | |
310 | #else | |
311 | va_start(ap); | |
312 | #endif | |
313 | rcleanup(0); | |
314 | vsyslog(LOG_ERR, msg, ap); | |
315 | va_end(ap); | |
e3127271 RC |
316 | putchar('\1'); /* return error code */ |
317 | exit(1); | |
318 | } |