1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
Copyright (C) 1994-2025 Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Inetutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see `http://www.gnu.org/licenses/'. */
#include <config.h>
#include <intalkd.h>
#include <stdarg.h>
#include <sys/uio.h>
#undef MAX
#define MAX(a,b) ( (a) > (b) ? (a) : (b) )
#define N_LINES 5
#define N_CHARS 256
#include <libinetutils.h>
typedef struct
{
int ind;
int max_size;
char line[N_LINES][N_CHARS];
int size[N_LINES];
char buf[N_LINES * N_CHARS + 3];
} LINE;
static void
init_line (LINE *lp)
{
memset (lp, 0, sizeof *lp);
}
static void
format_line (LINE *lp, const char *fmt, ...)
{
va_list ap;
int i = lp->ind;
if (lp->ind >= N_LINES)
return;
lp->ind++;
va_start (ap, fmt);
lp->size[i] = vsnprintf (lp->line[i], sizeof lp->line[i], fmt, ap);
lp->max_size = MAX (lp->max_size, lp->size[i]);
va_end (ap);
}
static char *
finish_line (LINE *lp)
{
int i;
char *p;
p = lp->buf;
*p++ = '\a';
*p++ = '\r';
*p++ = '\n';
for (i = 0; i < lp->ind; i++)
{
char *q;
int j;
for (q = lp->line[i]; *q; q++)
*p++ = *q;
for (j = lp->size[i]; j < lp->max_size + 2; j++)
*p++ = ' ';
*p++ = '\r';
*p++ = '\n';
}
*p = 0;
return lp->buf;
}
static int
print_mesg (char *tty, CTL_MSG *request, char *remote_machine)
{
time_t t;
LINE ln;
char *buf;
struct tm *tm;
struct iovec iovec;
char *cp;
time (&t);
tm = localtime (&t);
init_line (&ln);
format_line (&ln, "");
format_line (&ln, "Message from Talk_Daemon@%s at %d:%02d ...",
hostname, tm->tm_hour, tm->tm_min);
format_line (&ln, "talk: connection requested by %s@%s",
request->l_name, remote_machine);
format_line (&ln, "talk: respond with: talk %s@%s",
request->l_name, remote_machine);
format_line (&ln, "");
format_line (&ln, "");
buf = finish_line (&ln);
iovec.iov_base = buf;
iovec.iov_len = strlen (buf);
if ((cp = inetutils_ttymsg (&iovec, 1, tty, RING_WAIT - 5)) != NULL)
{
syslog (LOG_ERR, "%s", cp);
return FAILED;
}
return SUCCESS;
}
/* See if the user is accepting messages. If so, announce that
a talk is requested. */
int
announce (CTL_MSG *request, char *remote_machine)
{
char *ttypath;
int len;
struct stat st;
int rc;
len = sizeof (PATH_TTY_PFX) + strlen (request->r_tty) + 2;
ttypath = malloc (len);
if (!ttypath)
{
syslog (LOG_ERR, "Out of memory");
exit (EXIT_FAILURE);
}
sprintf (ttypath, "%s/%s", PATH_TTY_PFX, request->r_tty);
rc = stat (ttypath, &st);
free (ttypath);
if (rc < 0 || (st.st_mode & S_IWGRP) == 0)
return PERMISSION_DENIED;
return print_mesg (request->r_tty, request, remote_machine);
}
|
