testing.h

   1 #ifndef _TESTING_H
   2 #define _TESTING_H
   3
   4 /* Testing code. */
   5 #ifdef JUST_TESTING
   6
   7 #include <stdio.h>
   8 #include <unistd.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <errno.h>
  12 #include <stdarg.h>
  13 #include <sys/utsname.h>
  14 #include <asm/unistd.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <fcntl.h>
  18 #include <dirent.h>
  19 #include <time.h>
  20
  21 /* We don't use all of these. */
  22 static int modtest_uname(struct utsname *buf) __attribute__((unused));
  23 static long modtest_create_module(const char *name, size_t size)
  24 __attribute__((unused));
  25 static void *modtest_fopen(const char *path, const char *mode)
  26 __attribute__((unused));
  27 static int modtest_open(const char *path, int flags, mode_t mode)
  28 __attribute__((unused));
  29 static int modtest_stat(const char *file_name, struct stat *buf)
  30 __attribute__((unused));
  31 static int modtest_lstat(const char *file_name, struct stat *buf)
  32 __attribute__((unused));
  33 static DIR *modtest_opendir(const char *name) __attribute__((unused));
  34 static int modtest_system(const char *string) __attribute__((unused));
  35 static int modtest_rename(const char *oldpath, const char *newpath)
  36 __attribute__((unused));
  37 static long modtest_init_module(void *map, unsigned long size,
  38                                 const char *optstring) __attribute__((unused));
  39 static long modtest_delete_module(const char *modname, unsigned int flags)
  40 __attribute__((unused));
  41
  42 static int modtest_readlink(const char *path, char *buf, size_t bufsiz)
  43 __attribute__((unused));
  44
  45 static int modtest_uname(struct utsname *buf)
  46 {
  47         char *release = NULL;
  48
  49         strcpy(buf->sysname, "Linux");
  50         strcpy(buf->nodename, "fakenodename");
  51         if ((release = getenv("MODTEST_UNAME")))
  52                 strcpy(buf->release, release);
  53         else {
  54                 printf("MODTEST_OVERRIDE_ROOT used but MODTEST_UNAME not set.\n");
  55                 exit(1);
  56         }
  57         strcpy(buf->version, "Fakeversion");
  58         strcpy(buf->machine, "fakemachine");
  59         return 0;
  60 }
  61
  62 static long modtest_create_module(const char *name, size_t size)
  63 {
  64         if (getenv("MODTEST_DO_CREATE_MODULE"))
  65                 return 0;
  66         errno = ENOSYS;
  67         return -1;
  68 }
  69
  70 static long modtest_init_module(void *map, unsigned long size,
  71                                 const char *optstring)
  72 {
  73         const struct timespec delay = {
  74                 .tv_sec = 0,
  75                 .tv_nsec = 500 * 1000 * 1000
  76         };
  77
  78         if (getenv("MODPROBE_WAIT")) {
  79                 int fd;
  80                 const char *file = getenv("MODPROBE_WAIT");
  81
  82                 printf("Looping on %s\n", file);
  83                 fflush(stdout);
  84                 while ((fd = open(file, O_RDONLY)) < 0)
  85                         nanosleep(&delay, NULL);
  86                 close(fd);
  87                 printf("Removing %s\n", file);
  88                 unlink(file);
  89         }
  90         if (getenv("MODTEST_DUMP_INIT")) {
  91                 while (size) {
  92                         int ret;
  93                         ret = write(2, map, size);
  94                         if (ret < 0) exit(1);
  95                         size -= ret;
  96                         map += ret;
  97                 }
  98         } else
  99                 printf("INIT_MODULE: %lu %s\n", size, optstring);
 100
 101         return 0;
 102 }
 103
 104 static long modtest_delete_module(const char *modname, unsigned int flags)
 105 {
 106         char flagnames[100];
 107
 108         if (getenv("MODPROBE_WAIT")) {
 109                 int fd;
 110                 const char *file = getenv("MODPROBE_WAIT");
 111
 112                 printf("Looping on %s\n", file);
 113                 fflush(stdout);
 114                 while ((fd = open(file, O_RDONLY)) < 0)
 115                         sleep(1);
 116                 close(fd);
 117                 printf("Removing %s\n", file);
 118                 fflush(stdout);
 119                 unlink(file);
 120         }
 121         flagnames[0] = '\0';
 122         if (flags & O_EXCL)
 123                 strcat(flagnames, "EXCL ");
 124         if (flags & O_TRUNC)
 125                 strcat(flagnames, "TRUNC ");
 126         if (flags & O_NONBLOCK)
 127                 strcat(flagnames, "NONBLOCK ");
 128         if (flags & ~(O_EXCL|O_TRUNC|O_NONBLOCK))
 129                 strcat(flagnames, "UNKNOWN ");
 130
 131         printf("DELETE_MODULE: %s %s\n", modname, flagnames);
 132         return 0;
 133 }
 134
 135 /* Add prefix to absolute paths; relative paths are left unchanged */
 136 static const char *modtest_mapname(const char *path, char *buf, size_t buflen)
 137 {
 138         char *root;
 139
 140         if (path[0] != '/')
 141                 return path;
 142
 143         root = getenv("MODTEST_OVERRIDE_ROOT");
 144         if (!root)
 145                 return path;
 146
 147         snprintf(buf, buflen, "%s%s", root, path);
 148         return buf;
 149 }
 150
 151 static void *modtest_fopen(const char *path, const char *mode)
 152 {
 153         char path_buf[PATH_MAX];
 154
 155         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 156         return fopen(path, mode);
 157 }
 158
 159 static int modtest_open(const char *path, int flags, mode_t mode)
 160 {
 161         char path_buf[PATH_MAX];
 162
 163         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 164         return open(path, flags, mode);
 165 }
 166
 167 static int modtest_stat(const char *path, struct stat *buf)
 168 {
 169         char path_buf[PATH_MAX];
 170
 171         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 172         return stat(path, buf);
 173 }
 174
 175 static int modtest_lstat(const char *path, struct stat *buf)
 176 {
 177         char path_buf[PATH_MAX];
 178
 179         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 180         return lstat(path, buf);
 181 }
 182
 183 static DIR *modtest_opendir(const char *path)
 184 {
 185         char path_buf[PATH_MAX];
 186
 187         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 188         return opendir(path);
 189 }
 190
 191 static int modtest_system(const char *string)
 192 {
 193         if (getenv("MODTEST_DO_SYSTEM"))
 194                 return system(string);
 195         printf("SYSTEM: %s\n", string);
 196         return 0;
 197 }
 198
 199 static int modtest_rename(const char *oldpath, const char *newpath)
 200 {
 201         char oldpath_buf[PATH_MAX];
 202         char newpath_buf[PATH_MAX];
 203
 204         oldpath = modtest_mapname(oldpath, oldpath_buf, sizeof(oldpath_buf));
 205         newpath = modtest_mapname(newpath, newpath_buf, sizeof(newpath_buf));
 206         return rename(oldpath, newpath);
 207 }
 208
 209 static int modtest_readlink(const char *path, char *buf, size_t bufsiz)
 210 {
 211         char path_buf[PATH_MAX];
 212
 213         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 214         return readlink(path, buf, bufsiz);
 215 }
 216
 217 #ifdef CONFIG_USE_ZLIB
 218 #include <zlib.h>
 219 static gzFile *modtest_gzopen(const char *path, const char *mode)
 220 __attribute__((unused));
 221
 222 static gzFile *modtest_gzopen(const char *path, const char *mode)
 223 {
 224         char path_buf[PATH_MAX];
 225
 226         path = modtest_mapname(path, path_buf, sizeof(path_buf));
 227         return gzopen(path, mode);
 228 }
 229 #endif
 230
 231 /* create_module call */
 232 #undef create_module
 233 #define create_module modtest_create_module
 234
 235 #define uname modtest_uname
 236 #define delete_module modtest_delete_module
 237 #define init_module modtest_init_module
 238 #define open modtest_open
 239 #define fopen modtest_fopen
 240 #define stat(name, ptr) modtest_stat(name, ptr)
 241 #define lstat(name, ptr) modtest_lstat(name, ptr)
 242 #define opendir modtest_opendir
 243 #define system modtest_system
 244 #define rename modtest_rename
 245 #define readlink modtest_readlink
 246 #define gzopen modtest_gzopen
 247
 248 #endif /* JUST_TESTING */
 249 #endif /* _TESTING_H */
 250