mp3_afh.c: set bitrate, frequency and channels of struct audio_file_info
[paraslash.git] / user_list.c
1 /*
2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file user_list.c user handling for para_server */
20
21 #include "para.h"
22 #include "error.h"
23 #include "fd.h"
24 #include "string.h"
25 #include "user_list.h"
26
27 static struct list_head user_list;
28
29 /*
30 * lookup user in user list file. Fills in a user struct containing
31 * filename of the user's public key as well as the permissions of that user.
32 * Returns 1 on success, 0 if user does not exist and < 0 on errors.
33 */
34 static void populate_user_list(char *user_list_file)
35 {
36 FILE *file_ptr = NULL;
37 char *char_ptr;
38 char line[MAXLINE];
39 /* keyword, user, key, perms */
40 char w[MAXLINE], n[MAXLINE], k[MAXLINE], p[MAXLINE], tmp[4][MAXLINE];
41 int num, ret;
42
43 file_ptr = fopen(user_list_file, "r");
44 ret = -E_USERLIST;
45 if (!file_ptr)
46 goto out;
47 for (;;) {
48 struct user *u;
49 ret = para_fgets(line, MAXLINE, file_ptr);
50 if (ret < 0)
51 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
52 if (ret <= 0)
53 break;
54 if (sscanf(line,"%200s %200s %200s %200s", w, n, k, p) < 3)
55 continue;
56 if (strcmp(w, "user"))
57 continue;
58 PARA_DEBUG_LOG("found entry for %s\n", n);
59 u = para_malloc(sizeof(struct user));
60 u->name = para_strdup(n);
61 ret = get_rsa_key(k, &u->rsa, LOAD_PUBLIC_KEY);
62 if (ret < 0)
63 break;
64 char_ptr = p;
65 num = sscanf(char_ptr, "%200[A-Z_],%200[A-Z_],%200[A-Z_],%200[A-Z_]",
66 tmp[0], tmp[1], tmp[2], tmp[3]);
67 PARA_DEBUG_LOG("found %i perm entries\n", num);
68 u->perms = 0;
69 while (num > 0) {
70 num--;
71 if (!strcmp(tmp[num], "VSS_READ"))
72 u->perms |= VSS_READ;
73 else if (!strcmp(tmp[num], "VSS_WRITE"))
74 u->perms |= VSS_WRITE;
75 else if (!strcmp(tmp[num], "AFS_READ"))
76 u->perms |= AFS_READ;
77 else if (!strcmp(tmp[num], "AFS_WRITE"))
78 u->perms |= AFS_WRITE;
79 else /* unknown permission */
80 PARA_WARNING_LOG("ignoring unknown permission: %s\n",
81 tmp[num]);
82 }
83 para_list_add(&u->node, &user_list);
84 }
85 out:
86 if (file_ptr)
87 fclose(file_ptr);
88 if (ret >= 0)
89 return;
90 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
91 exit(EXIT_FAILURE);
92 }
93
94 /**
95 * initialize the list of users allowed to connecto to para_server
96 *
97 * \param user_list_file the file containing access information
98 *
99 * If this function is called a second time, the contents of the
100 * previous call are discarded.
101 */
102 void init_user_list(char *user_list_file)
103 {
104 struct user *u, *tmp;
105 static int initialized;
106
107 if (initialized) {
108 list_for_each_entry_safe(u, tmp, &user_list, node) {
109 list_del(&u->node);
110 free(u->name);
111 rsa_free(u->rsa);
112 free(u);
113 }
114 } else
115 INIT_LIST_HEAD(&user_list);
116 initialized = 1;
117 populate_user_list(user_list_file);
118 }
119
120 /**
121 * lookup user in user_list.
122 *
123 * \param name of the user
124 *
125 * \return a pointer to the corresponding user struct if the user was found,
126 * \p NULL otherwise.
127 */
128 struct user *lookup_user(const char *name)
129 {
130 struct user *u;
131 list_for_each_entry(u, &user_list, node) {
132 if (strcmp(u->name, name))
133 continue;
134 return u;
135 }
136 return NULL;
137 }