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e701e381 LDM |
1 | /* |
2 | * Copyright (C) 2012 ProFUSION embedded systems | |
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, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
f6ef5d6b LDM |
18 | #include <assert.h> |
19 | #include <errno.h> | |
20 | #include <dirent.h> | |
21 | #include <fcntl.h> | |
22 | #include <dlfcn.h> | |
23 | #include <limits.h> | |
24 | #include <stdlib.h> | |
25 | #include <stdarg.h> | |
26 | #include <stddef.h> | |
27 | #include <string.h> | |
28 | #include <stdio.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | #include <unistd.h> | |
32 | ||
33 | #include "testsuite.h" | |
34 | ||
35 | struct mod { | |
36 | struct mod *next; | |
37 | int ret; | |
38 | int errcode; | |
39 | char name[]; | |
40 | }; | |
41 | ||
42 | static struct mod *modules; | |
43 | static bool need_init = true; | |
44 | ||
45 | static void parse_retcodes(struct mod *_modules, const char *s) | |
46 | { | |
47 | const char *p; | |
48 | ||
49 | if (s == NULL) | |
50 | return; | |
51 | ||
52 | for (p = s;;) { | |
53 | struct mod *mod; | |
54 | const char *modname; | |
55 | char *end; | |
56 | size_t modnamelen; | |
57 | int ret, errcode; | |
58 | long l; | |
59 | ||
60 | modname = p; | |
61 | if (modname == NULL || modname[0] == '\0') | |
62 | break; | |
63 | ||
64 | modnamelen = strcspn(s, ":"); | |
65 | if (modname[modnamelen] != ':') | |
66 | break; | |
67 | ||
68 | p = modname + modnamelen + 1; | |
69 | if (p == NULL) | |
70 | break; | |
71 | ||
72 | l = strtol(p, &end, 0); | |
73 | if (end == p || *end != ':') | |
74 | break; | |
75 | ret = (int) l; | |
76 | p = end + 1; | |
77 | ||
78 | l = strtol(p, &end, 0); | |
79 | if (*end == ':') | |
80 | p = end + 1; | |
81 | else if (*end != '\0') | |
82 | break; | |
83 | ||
84 | errcode = (int) l; | |
85 | ||
86 | mod = malloc(sizeof(*mod) + modnamelen + 1); | |
87 | if (mod == NULL) | |
88 | break; | |
89 | ||
90 | memcpy(mod->name, modname, modnamelen); | |
91 | mod->name[modnamelen] = '\0'; | |
92 | mod->ret = ret; | |
93 | mod->errcode = errcode; | |
94 | mod->next = _modules; | |
95 | _modules = mod; | |
96 | } | |
97 | } | |
98 | ||
99 | static struct mod *find_module(struct mod *_modules, const char *modname) | |
100 | { | |
101 | struct mod *mod; | |
102 | ||
103 | for (mod = _modules; mod != NULL; mod = mod->next) { | |
104 | if (strcmp(mod->name, modname)) | |
105 | return mod; | |
106 | } | |
107 | ||
108 | return NULL; | |
109 | } | |
110 | ||
111 | static void init_retcodes(void) | |
112 | { | |
113 | const char *s; | |
114 | ||
115 | if (!need_init) | |
116 | return; | |
117 | ||
118 | need_init = false; | |
119 | s = getenv(S_TC_DELETE_MODULE_RETCODES); | |
120 | if (s == NULL) { | |
121 | fprintf(stderr, "TRAP delete_module(): missing export %s?\n", | |
122 | S_TC_DELETE_MODULE_RETCODES); | |
123 | } | |
124 | ||
125 | parse_retcodes(modules, s); | |
126 | } | |
127 | ||
128 | TS_EXPORT long delete_module(const char *name, unsigned int flags); | |
129 | ||
130 | /* | |
131 | * FIXME: change /sys/module/<modname> to fake-remove a module | |
132 | * | |
133 | * Default behavior is to exit successfully. If this is not the intended | |
134 | * behavior, set TESTSUITE_DELETE_MODULE_RETCODES env var. | |
135 | */ | |
136 | long delete_module(const char *modname, unsigned int flags) | |
137 | { | |
138 | struct mod *mod; | |
139 | ||
140 | init_retcodes(); | |
141 | mod = find_module(modules, modname); | |
142 | if (mod == NULL) | |
143 | return 0; | |
144 | ||
145 | errno = mod->errcode; | |
146 | return mod->ret; | |
147 | } | |
148 | ||
149 | /* the test is going away anyway, but lets keep valgrind happy */ | |
150 | void free_resources(void) __attribute__((destructor)); | |
151 | void free_resources(void) | |
152 | { | |
153 | while (modules) { | |
154 | struct mod *mod = modules->next; | |
155 | free(modules); | |
156 | modules = mod; | |
157 | } | |
158 | } |