static void test_bad_command(data_t *data, const char *cmd)
{
FILE *ctl;
size_t written;
ctl = igt_debugfs_fopen("i915_display_crc_ctl", "r+");
written = fwrite(cmd, 1, strlen(cmd), ctl);
fflush(ctl);
igt_assert_eq(written, strlen(cmd));
igt_assert(ferror(ctl));
igt_assert_eq(errno, EINVAL);
fclose(ctl);
}
static int get_object_count(void)
{
FILE *file;
int ret, scanned;
igt_drop_caches_set(DROP_RETIRE | DROP_ACTIVE);
file = igt_debugfs_fopen("i915_gem_objects", "r");
scanned = fscanf(file, "%i objects", &ret);
igt_assert_eq(scanned, 1);
return ret;
}
/**
* __igt_debugfs_read:
* @filename: file name
* @buf: buffer where the contents will be stored, allocated by the caller
* @buf_size: size of the buffer
*
* This function opens the debugfs file, reads it, stores the content in the
* provided buffer, then closes the file. Users should make sure that the buffer
* provided is big enough to fit the whole file, plus one byte.
*/
void __igt_debugfs_read(const char *filename, char *buf, int buf_size)
{
FILE *file;
size_t n_read;
file = igt_debugfs_fopen(filename, "r");
igt_assert(file);
n_read = fread(buf, 1, buf_size - 1, file);
igt_assert(n_read > 0);
igt_assert(feof(file));
buf[n_read] = '\0';
igt_assert(fclose(file) == 0);
}
/**
* igt_require_pipe_crc:
*
* Convenience helper to check whether pipe CRC capturing is supported by the
* kernel. Uses igt_skip to automatically skip the test/subtest if this isn't
* the case.
*/
void igt_require_pipe_crc(void)
{
const char *cmd = "pipe A none";
FILE *ctl;
size_t written;
int ret;
ctl = igt_debugfs_fopen("i915_display_crc_ctl", "r+");
igt_require_f(ctl,
"No display_crc_ctl found, kernel too old\n");
written = fwrite(cmd, 1, strlen(cmd), ctl);
ret = fflush(ctl);
igt_require_f((written == strlen(cmd) && ret == 0) || errno != ENODEV,
"CRCs not supported on this platform\n");
fclose(ctl);
}
/**
* igt_debugfs_search:
* @filename: file name
* @substring: string to search for in @filename
*
* Searches each line in @filename for the substring specified in @substring.
*
* Returns: True if the @substring is found to occur in @filename
*/
bool igt_debugfs_search(const char *filename, const char *substring)
{
FILE *file;
size_t n = 0;
char *line = NULL;
bool matched = false;
file = igt_debugfs_fopen(filename, "r");
igt_assert(file);
while (getline(&line, &n, file) >= 0) {
matched = (strstr(line, substring) != NULL);
if (matched)
break;
}
free(line);
fclose(file);
return matched;
}
