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1 | /* |
2 | * Copyright (C) 2012 ProFUSION embedded systems | |
3 | * | |
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4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
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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 | |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
e701e381 | 13 | * |
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14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
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17 | */ |
18 | ||
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19 | #include <assert.h> |
20 | #include <errno.h> | |
21 | #include <dirent.h> | |
22 | #include <fcntl.h> | |
23 | #include <dlfcn.h> | |
24 | #include <limits.h> | |
25 | #include <stdlib.h> | |
26 | #include <stdarg.h> | |
27 | #include <stddef.h> | |
28 | #include <string.h> | |
29 | #include <stdio.h> | |
30 | #include <sys/types.h> | |
31 | #include <sys/stat.h> | |
32 | #include <unistd.h> | |
33 | ||
34 | #include "testsuite.h" | |
35 | ||
36 | struct mod { | |
37 | struct mod *next; | |
38 | int ret; | |
39 | int errcode; | |
40 | char name[]; | |
41 | }; | |
42 | ||
43 | static struct mod *modules; | |
44 | static bool need_init = true; | |
45 | ||
46 | static void parse_retcodes(struct mod *_modules, const char *s) | |
47 | { | |
48 | const char *p; | |
49 | ||
50 | if (s == NULL) | |
51 | return; | |
52 | ||
53 | for (p = s;;) { | |
54 | struct mod *mod; | |
55 | const char *modname; | |
56 | char *end; | |
57 | size_t modnamelen; | |
58 | int ret, errcode; | |
59 | long l; | |
60 | ||
61 | modname = p; | |
62 | if (modname == NULL || modname[0] == '\0') | |
63 | break; | |
64 | ||
65 | modnamelen = strcspn(s, ":"); | |
66 | if (modname[modnamelen] != ':') | |
67 | break; | |
68 | ||
69 | p = modname + modnamelen + 1; | |
70 | if (p == NULL) | |
71 | break; | |
72 | ||
73 | l = strtol(p, &end, 0); | |
74 | if (end == p || *end != ':') | |
75 | break; | |
76 | ret = (int) l; | |
77 | p = end + 1; | |
78 | ||
79 | l = strtol(p, &end, 0); | |
80 | if (*end == ':') | |
81 | p = end + 1; | |
82 | else if (*end != '\0') | |
83 | break; | |
84 | ||
85 | errcode = (int) l; | |
86 | ||
87 | mod = malloc(sizeof(*mod) + modnamelen + 1); | |
88 | if (mod == NULL) | |
89 | break; | |
90 | ||
91 | memcpy(mod->name, modname, modnamelen); | |
92 | mod->name[modnamelen] = '\0'; | |
93 | mod->ret = ret; | |
94 | mod->errcode = errcode; | |
95 | mod->next = _modules; | |
96 | _modules = mod; | |
97 | } | |
98 | } | |
99 | ||
100 | static struct mod *find_module(struct mod *_modules, const char *modname) | |
101 | { | |
102 | struct mod *mod; | |
103 | ||
104 | for (mod = _modules; mod != NULL; mod = mod->next) { | |
105 | if (strcmp(mod->name, modname)) | |
106 | return mod; | |
107 | } | |
108 | ||
109 | return NULL; | |
110 | } | |
111 | ||
112 | static void init_retcodes(void) | |
113 | { | |
114 | const char *s; | |
115 | ||
116 | if (!need_init) | |
117 | return; | |
118 | ||
119 | need_init = false; | |
120 | s = getenv(S_TC_DELETE_MODULE_RETCODES); | |
121 | if (s == NULL) { | |
122 | fprintf(stderr, "TRAP delete_module(): missing export %s?\n", | |
123 | S_TC_DELETE_MODULE_RETCODES); | |
124 | } | |
125 | ||
126 | parse_retcodes(modules, s); | |
127 | } | |
128 | ||
129 | TS_EXPORT long delete_module(const char *name, unsigned int flags); | |
130 | ||
131 | /* | |
132 | * FIXME: change /sys/module/<modname> to fake-remove a module | |
133 | * | |
134 | * Default behavior is to exit successfully. If this is not the intended | |
135 | * behavior, set TESTSUITE_DELETE_MODULE_RETCODES env var. | |
136 | */ | |
137 | long delete_module(const char *modname, unsigned int flags) | |
138 | { | |
139 | struct mod *mod; | |
140 | ||
141 | init_retcodes(); | |
142 | mod = find_module(modules, modname); | |
143 | if (mod == NULL) | |
144 | return 0; | |
145 | ||
146 | errno = mod->errcode; | |
147 | return mod->ret; | |
148 | } | |
149 | ||
150 | /* the test is going away anyway, but lets keep valgrind happy */ | |
151 | void free_resources(void) __attribute__((destructor)); | |
152 | void free_resources(void) | |
153 | { | |
154 | while (modules) { | |
155 | struct mod *mod = modules->next; | |
156 | free(modules); | |
157 | modules = mod; | |
158 | } | |
159 | } |