1 /*
2 * Copyright (c) 1983, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 04/17/94";
10 #endif /* not lint */
11
12
13 #include <sys/param.h>
14 #include <sys/socket.h>
15 #include <sys/un.h>
16
17 #include <dirent.h>
18 #include <errno.h>
19 #include <stdio.h>
20 #include <unistd.h>
21 #include <string.h>
22 #include "lp.h"
23 #include "pathnames.h"
24
25 static void perr __P((char *));
26
27 /*
28 * Tell the printer daemon that there are new files in the spool directory.
29 */
30
31 int
startdaemon(printer)32 startdaemon(printer)
33 char *printer;
34 {
35 struct sockaddr_un un;
36 register int s, n;
37 char buf[BUFSIZ];
38
39 s = socket(AF_UNIX, SOCK_STREAM, 0);
40 if (s < 0) {
41 perr("socket");
42 return(0);
43 }
44 memset(&un, 0, sizeof(un));
45 un.sun_family = AF_UNIX;
46 strcpy(un.sun_path, _PATH_SOCKETNAME);
47 #ifndef SUN_LEN
48 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
49 #endif
50 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) {
51 perr("connect");
52 (void) close(s);
53 return(0);
54 }
55 (void) sprintf(buf, "\1%s\n", printer);
56 n = strlen(buf);
57 if (write(s, buf, n) != n) {
58 perr("write");
59 (void) close(s);
60 return(0);
61 }
62 if (read(s, buf, 1) == 1) {
63 if (buf[0] == '\0') { /* everything is OK */
64 (void) close(s);
65 return(1);
66 }
67 putchar(buf[0]);
68 }
69 while ((n = read(s, buf, sizeof(buf))) > 0)
70 fwrite(buf, 1, n, stdout);
71 (void) close(s);
72 return(0);
73 }
74
75 static void
perr(msg)76 perr(msg)
77 char *msg;
78 {
79 extern char *name;
80
81 (void)printf("%s: %s: %s\n", name, msg, strerror(errno));
82 }
83