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startdaemon.c (29780) startdaemon.c (31492)
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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31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94";
37#endif
38static const char rcsid[] =
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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31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94";
37#endif
38static const char rcsid[] =
39 "$Id$";
39 "$Id: startdaemon.c,v 1.6 1997/09/24 06:47:32 charnier Exp $";
40#endif /* not lint */
41
42
43#include <sys/param.h>
44#include <sys/socket.h>
40#endif /* not lint */
41
42
43#include <sys/param.h>
44#include <sys/socket.h>
45#include <sys/uio.h>
45#include <sys/un.h>
46
47#include <dirent.h>
48#include <err.h>
49#include <stdio.h>
50#include <string.h>
51#include <unistd.h>
52#include "lp.h"
53#include "pathnames.h"
54
55extern uid_t uid, euid;
56
57/*
58 * Tell the printer daemon that there are new files in the spool directory.
59 */
60
61int
46#include <sys/un.h>
47
48#include <dirent.h>
49#include <err.h>
50#include <stdio.h>
51#include <string.h>
52#include <unistd.h>
53#include "lp.h"
54#include "pathnames.h"
55
56extern uid_t uid, euid;
57
58/*
59 * Tell the printer daemon that there are new files in the spool directory.
60 */
61
62int
62startdaemon(printer)
63 char *printer;
63startdaemon(pp)
64 const struct printer *pp;
64{
65 struct sockaddr_un un;
66 register int s, n;
65{
66 struct sockaddr_un un;
67 register int s, n;
67 char buf[BUFSIZ];
68 char c;
68
69
69 s = socket(AF_UNIX, SOCK_STREAM, 0);
70 s = socket(PF_LOCAL, SOCK_STREAM, 0);
70 if (s < 0) {
71 warn("socket");
72 return(0);
73 }
74 memset(&un, 0, sizeof(un));
71 if (s < 0) {
72 warn("socket");
73 return(0);
74 }
75 memset(&un, 0, sizeof(un));
75 un.sun_family = AF_UNIX;
76 un.sun_family = AF_LOCAL;
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);
83 warn("connect");
84 (void) close(s);
85 return(0);
86 }
87 seteuid(uid);
77 strcpy(un.sun_path, _PATH_SOCKETNAME);
78#ifndef SUN_LEN
79#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
80#endif
81 seteuid(euid);
82 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) {
83 seteuid(uid);
84 warn("connect");
85 (void) close(s);
86 return(0);
87 }
88 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) {
89
90 /*
91 * Avoid overruns without putting artificial limitations on
92 * the length.
93 */
94 if (writel(s, "\1", pp->printer, "\n", (char *)0) <= 0) {
94 warn("write");
95 (void) close(s);
96 return(0);
97 }
95 warn("write");
96 (void) close(s);
97 return(0);
98 }
98 if (read(s, buf, 1) == 1) {
99 if (buf[0] == '\0') { /* everything is OK */
99 if (read(s, &c, 1) == 1) {
100 if (c == '\0') { /* everything is OK */
100 (void) close(s);
101 return(1);
102 }
101 (void) close(s);
102 return(1);
103 }
103 putchar(buf[0]);
104 putchar(c);
104 }
105 }
105 while ((n = read(s, buf, sizeof(buf))) > 0)
106 fwrite(buf, 1, n, stdout);
106 while ((n = read(s, &c, 1)) > 0)
107 putchar(c);
107 (void) close(s);
108 return(0);
109}
108 (void) close(s);
109 return(0);
110}