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startdaemon.c (27757) startdaemon.c (29780)
1/*
2 * Copyright (c) 1983, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
1/*
2 * Copyright (c) 1983, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
35static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94";
36static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94";
37#endif
38static const char rcsid[] =
39 "$Id$";
36#endif /* not lint */
37
38
39#include <sys/param.h>
40#include <sys/socket.h>
41#include <sys/un.h>
42
43#include <dirent.h>
40#endif /* not lint */
41
42
43#include <sys/param.h>
44#include <sys/socket.h>
45#include <sys/un.h>
46
47#include <dirent.h>
44#include <errno.h>
48#include
45#include <stdio.h>
49#include <stdio.h>
46#include <unistd.h>
47#include <string.h>
50#include <string.h>
51#include <unistd.h>
48#include "lp.h"
49#include "pathnames.h"
50
51extern uid_t uid, euid;
52
52#include "lp.h"
53#include "pathnames.h"
54
55extern uid_t uid, euid;
56
53static void perr __P((char *));
54
55/*
56 * Tell the printer daemon that there are new files in the spool directory.
57 */
58
59int
60startdaemon(printer)
61 char *printer;
62{
63 struct sockaddr_un un;
64 register int s, n;
65 char buf[BUFSIZ];
66
67 s = socket(AF_UNIX, SOCK_STREAM, 0);
68 if (s < 0) {
57/*
58 * Tell the printer daemon that there are new files in the spool directory.
59 */
60
61int
62startdaemon(printer)
63 char *printer;
64{
65 struct sockaddr_un un;
66 register int s, n;
67 char buf[BUFSIZ];
68
69 s = socket(AF_UNIX, SOCK_STREAM, 0);
70 if (s < 0) {
69 perr("socket");
71 warn("socket");
70 return(0);
71 }
72 memset(&un, 0, sizeof(un));
73 un.sun_family = AF_UNIX;
74 strcpy(un.sun_path, _PATH_SOCKETNAME);
75#ifndef SUN_LEN
76#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
77#endif
78 seteuid(euid);
79 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) {
80 seteuid(uid);
72 return(0);
73 }
74 memset(&un, 0, sizeof(un));
75 un.sun_family = AF_UNIX;
76 strcpy(un.sun_path, _PATH_SOCKETNAME);
77#ifndef SUN_LEN
78#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
79#endif
80 seteuid(euid);
81 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) {
82 seteuid(uid);
81 perr("connect");
83 warn("connect");
82 (void) close(s);
83 return(0);
84 }
85 seteuid(uid);
86 if (snprintf(buf, sizeof(buf), "\1%s\n", printer) > sizeof(buf) - 1) {
87 close(s);
88 return (0);
89 }
90 n = strlen(buf);
91 if (write(s, buf, n) != n) {
84 (void) close(s);
85 return(0);
86 }
87 seteuid(uid);
88 if (snprintf(buf, sizeof(buf), "\1%s\n", printer) > sizeof(buf) - 1) {
89 close(s);
90 return (0);
91 }
92 n = strlen(buf);
93 if (write(s, buf, n) != n) {
92 perr("write");
94 warn("write");
93 (void) close(s);
94 return(0);
95 }
96 if (read(s, buf, 1) == 1) {
97 if (buf[0] == '\0') { /* everything is OK */
98 (void) close(s);
99 return(1);
100 }
101 putchar(buf[0]);
102 }
103 while ((n = read(s, buf, sizeof(buf))) > 0)
104 fwrite(buf, 1, n, stdout);
105 (void) close(s);
106 return(0);
107}
95 (void) close(s);
96 return(0);
97 }
98 if (read(s, buf, 1) == 1) {
99 if (buf[0] == '\0') { /* everything is OK */
100 (void) close(s);
101 return(1);
102 }
103 putchar(buf[0]);
104 }
105 while ((n = read(s, buf, sizeof(buf))) > 0)
106 fwrite(buf, 1, n, stdout);
107 (void) close(s);
108 return(0);
109}
108
109static void
110perr(msg)
111 char *msg;
112{
113 (void)printf("%s: %s: %s\n", name, msg, strerror(errno));
114}