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Commit | Line | Data |
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d8e20246 | 1 | /* $Header$ |
2 | * | |
3 | * Routines to handle configuration file for Moira's update_server. | |
4 | * These routines must load the file into memory rather than parse | |
5 | * it each time as one of the things the server may do is chroot() | |
6 | * itself. | |
7 | * | |
8 | * (c) Copyright 1992 by the Massachusetts Institute of Technology. | |
9 | * For copying and distribution information, please see the file | |
10 | * <mit-copyright.h>. | |
11 | */ | |
12 | ||
13 | #include <mit-copyright.h> | |
14 | #include <stdio.h> | |
5eaef520 | 15 | #include <stdlib.h> |
c6a18c8f | 16 | #include <string.h> |
d8e20246 | 17 | #include <ctype.h> |
18 | #include <sys/types.h> | |
19 | #include <sys/stat.h> | |
20 | #include <sys/file.h> | |
5f5f277b | 21 | #include <fcntl.h> |
d8e20246 | 22 | #include <moira.h> |
23 | ||
24 | ||
25 | #define CONFIG_FILE "/etc/athena/moira.conf" | |
26 | ||
27 | /* Variables currently supported: | |
28 | * chroot directory daemon will run chrooted to this directory | |
29 | * user username daemon will run with this user's uid | |
30 | * port portname daemon will listen on this port number | |
31 | * nofork server stays in foreground & logs to stdout | |
32 | * auth krbname this user is authorized to connect | |
33 | * noclobber will not overwrite existing files | |
34 | * noexec will not execute instructions received | |
35 | */ | |
36 | ||
37 | static char *config_buf = NULL; | |
38 | static char **config_keys, **config_values; | |
39 | ||
40 | ||
41 | static init() | |
42 | { | |
5eaef520 | 43 | int fd, count = 0; |
44 | struct stat st; | |
45 | char *p, *start; | |
46 | ||
47 | /* Only execute once */ | |
48 | if (config_buf) | |
49 | return MR_SUCCESS; | |
50 | ||
51 | fd = open(CONFIG_FILE, O_RDONLY, 0); | |
52 | if (fd < 0) | |
53 | { | |
54 | config_buf = ""; | |
55 | config_keys = malloc(sizeof(char *) * 2); | |
56 | config_keys[0] = config_keys[1] = NULL; | |
57 | return MR_SUCCESS; | |
d8e20246 | 58 | } |
5eaef520 | 59 | if (fstat(fd, &st) < 0) |
60 | return MR_INTERNAL; | |
61 | config_buf = malloc(st.st_size + 2); | |
62 | if (!config_buf) | |
63 | return MR_NO_MEM; | |
64 | if (read(fd, config_buf, st.st_size) < st.st_size) | |
65 | { | |
66 | free(config_buf); | |
67 | config_buf = NULL; | |
68 | return MR_INTERNAL; | |
d8e20246 | 69 | } |
5eaef520 | 70 | config_buf[st.st_size] = '\0'; |
71 | ||
72 | for (p = config_buf; *p; p++) | |
73 | { | |
74 | if (*p == '\n') | |
75 | count++; | |
d8e20246 | 76 | } |
5eaef520 | 77 | count++; |
78 | config_keys = malloc(count * sizeof(char *)); | |
79 | config_values = malloc(count * sizeof(char *)); | |
80 | if (!config_keys || !config_values) | |
81 | { | |
82 | free(config_buf); | |
83 | config_buf = NULL; | |
84 | return MR_NO_MEM; | |
d8e20246 | 85 | } |
5eaef520 | 86 | count = 0; |
87 | for (p = strtok(config_buf, "\n"); p; p = strtok(NULL, "\n")) | |
88 | config_keys[count++] = p; | |
89 | config_keys[count] = NULL; | |
90 | for (count = 0; config_keys[count]; count++) | |
91 | { | |
92 | config_values[count] = ""; | |
93 | for (p = config_keys[count]; *p; p++) | |
94 | { | |
95 | if (isspace(*p)) | |
96 | { | |
d8e20246 | 97 | *p++ = '\0'; |
5eaef520 | 98 | while (*p && isspace(*p)) |
99 | p++; | |
d8e20246 | 100 | config_values[count] = p; |
5eaef520 | 101 | } |
102 | } | |
d8e20246 | 103 | } |
5eaef520 | 104 | return MR_SUCCESS; |
d8e20246 | 105 | } |
106 | ||
107 | ||
5eaef520 | 108 | /* Given a key, lookup the associated value. |
d8e20246 | 109 | * Returns "" on a key without a value, NULL on a non-existant key. |
110 | * If a key appears multiple times, successive calls will cycle through | |
111 | * the possible values. | |
112 | */ | |
113 | ||
5eaef520 | 114 | char *config_lookup(char *key) |
d8e20246 | 115 | { |
5eaef520 | 116 | static int i = 0; |
117 | int start; | |
d8e20246 | 118 | |
5eaef520 | 119 | if (init() != MR_SUCCESS) |
120 | return NULL; | |
d8e20246 | 121 | |
5eaef520 | 122 | start = i++; |
123 | if (!config_keys[i]) | |
124 | i = 0; | |
125 | if (!config_keys[i]) | |
126 | return NULL; | |
d8e20246 | 127 | |
5eaef520 | 128 | do |
129 | { | |
d8e20246 | 130 | if (!strcasecmp(key, config_keys[i])) |
5eaef520 | 131 | return config_values[i]; |
132 | if (!config_keys[++i]) | |
d8e20246 | 133 | i = 0; |
5eaef520 | 134 | } |
135 | while (i != start); | |
d8e20246 | 136 | |
5eaef520 | 137 | if (!strcasecmp(key, config_keys[i])) |
138 | return config_values[i]; | |
d8e20246 | 139 | |
5eaef520 | 140 | return NULL; |
d8e20246 | 141 | } |