1 |
|
|
/* $OpenBSD: client.c,v 1.8 2015/11/12 21:12:05 millert Exp $ */ |
2 |
|
|
|
3 |
|
|
/* Copyright 1988,1990,1993,1994 by Paul Vixie |
4 |
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") |
5 |
|
|
* Copyright (c) 1997,2000 by Internet Software Consortium, Inc. |
6 |
|
|
* |
7 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
8 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
9 |
|
|
* copyright notice and this permission notice appear in all copies. |
10 |
|
|
* |
11 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
12 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
13 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR |
14 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
15 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
16 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
17 |
|
|
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
18 |
|
|
*/ |
19 |
|
|
|
20 |
|
|
#include <sys/types.h> |
21 |
|
|
#include <sys/socket.h> |
22 |
|
|
#include <sys/stat.h> |
23 |
|
|
#include <sys/un.h> |
24 |
|
|
|
25 |
|
|
#include <bitstring.h> /* for structs.h */ |
26 |
|
|
#include <err.h> |
27 |
|
|
#include <errno.h> |
28 |
|
|
#include <stdio.h> |
29 |
|
|
#include <stdlib.h> |
30 |
|
|
#include <string.h> |
31 |
|
|
#include <time.h> /* for structs.h */ |
32 |
|
|
#include <unistd.h> |
33 |
|
|
|
34 |
|
|
#include "pathnames.h" |
35 |
|
|
#include "macros.h" |
36 |
|
|
#include "structs.h" |
37 |
|
|
#include "funcs.h" |
38 |
|
|
#include "globals.h" |
39 |
|
|
|
40 |
|
|
/* int in_file(const char *string, FILE *file, int error) |
41 |
|
|
* return TRUE if one of the lines in file matches string exactly, |
42 |
|
|
* FALSE if no lines match, and error on error. |
43 |
|
|
*/ |
44 |
|
|
static int |
45 |
|
|
in_file(const char *string, FILE *file, int error) |
46 |
|
|
{ |
47 |
|
|
char line[MAX_TEMPSTR]; |
48 |
|
|
char *endp; |
49 |
|
|
|
50 |
|
|
if (fseek(file, 0L, SEEK_SET)) |
51 |
|
|
return (error); |
52 |
|
|
while (fgets(line, MAX_TEMPSTR, file)) { |
53 |
|
|
if (line[0] != '\0') { |
54 |
|
|
endp = &line[strlen(line) - 1]; |
55 |
|
|
if (*endp != '\n') |
56 |
|
|
return (error); |
57 |
|
|
*endp = '\0'; |
58 |
|
|
if (0 == strcmp(line, string)) |
59 |
|
|
return (TRUE); |
60 |
|
|
} |
61 |
|
|
} |
62 |
|
|
if (ferror(file)) |
63 |
|
|
return (error); |
64 |
|
|
return (FALSE); |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
/* int allowed(const char *username, const char *allow_file, const char *deny_file) |
68 |
|
|
* returns TRUE if (allow_file exists and user is listed) |
69 |
|
|
* or (deny_file exists and user is NOT listed). |
70 |
|
|
* root is always allowed. |
71 |
|
|
*/ |
72 |
|
|
int |
73 |
|
|
allowed(const char *username, const char *allow_file, const char *deny_file) |
74 |
|
|
{ |
75 |
|
|
FILE *fp; |
76 |
|
|
int isallowed; |
77 |
|
|
|
78 |
|
|
if (strcmp(username, "root") == 0) |
79 |
|
|
return (TRUE); |
80 |
|
|
isallowed = FALSE; |
81 |
|
|
if ((fp = fopen(allow_file, "r")) != NULL) { |
82 |
|
|
isallowed = in_file(username, fp, FALSE); |
83 |
|
|
fclose(fp); |
84 |
|
|
} else if ((fp = fopen(deny_file, "r")) != NULL) { |
85 |
|
|
isallowed = !in_file(username, fp, FALSE); |
86 |
|
|
fclose(fp); |
87 |
|
|
} |
88 |
|
|
return (isallowed); |
89 |
|
|
} |
90 |
|
|
|
91 |
|
|
/* void poke_daemon(unsigned char cookie) |
92 |
|
|
* touches spool_dir and sends a poke to the cron daemon if running. |
93 |
|
|
*/ |
94 |
|
|
void |
95 |
|
|
poke_daemon(unsigned char cookie) |
96 |
|
|
{ |
97 |
|
|
int sock = -1; |
98 |
|
|
const char *cronsock = _PATH_CRON_SOCK; |
99 |
|
|
struct stat sb; |
100 |
|
|
struct sockaddr_un s_un; |
101 |
|
|
|
102 |
|
|
if (stat(cronsock, &sb) != 0) |
103 |
|
|
cronsock = _PATH_CRON_SOCK_OLD; /* backwards compatibility */ |
104 |
|
|
|
105 |
|
|
bzero(&s_un, sizeof(s_un)); |
106 |
|
|
if (strlcpy(s_un.sun_path, cronsock, sizeof(s_un.sun_path)) >= |
107 |
|
|
sizeof(s_un.sun_path)) { |
108 |
|
|
warnc(ENAMETOOLONG, "%s", cronsock); |
109 |
|
|
return; |
110 |
|
|
} |
111 |
|
|
s_un.sun_family = AF_UNIX; |
112 |
|
|
if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && |
113 |
|
|
connect(sock, (struct sockaddr *)&s_un, sizeof(s_un)) == 0) |
114 |
|
|
send(sock, &cookie, 1, MSG_NOSIGNAL); |
115 |
|
|
else |
116 |
|
|
warnx("warning, cron does not appear to be running"); |
117 |
|
|
if (sock >= 0) |
118 |
|
|
close(sock); |
119 |
|
|
} |