void generate(int disk, int size)
{
char path[PATH_MAX];
char* file;
snprintf(path, sizeof(path), "bench/disk%d/", disk);
file = path + strlen(path);
/* add a directory */
*file++ = 'a' + rnd(2);
*file = 0;
/* create it */
if (mkdir(path, 0777) != 0) {
if (errno != EEXIST) {
/* LCOV_EXCL_START */
fprintf(stderr, "Error creating directory %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
}
*file++ = '/';
while (1) {
/* add a random file */
rnd_name(file);
/* skip some invalid file name, see http://en.wikipedia.org/wiki/Filename */
if (strcmp(file, ".") == 0
|| strcmp(file, "..") == 0
|| strcmp(file, "prn") == 0
|| strcmp(file, "con") == 0
|| strcmp(file, "nul") == 0
|| strcmp(file, "aux") == 0
|| file[0] == ' '
|| file[strlen(file)-1] == ' '
|| file[strlen(file)-1] == '.'
) {
continue;
}
break;
}
#ifndef WIN32 /* Windows XP doesn't support symlinks */
if (rnd(32) == 0) {
/* symlink */
char linkto[PATH_MAX];
rnd_name(linkto);
create_symlink(path, linkto);
} else
#endif
{
/* file */
create_file(path, size);
}
}
/**
* Change a file. Or deleted/truncated/append/created.
* - The file must exist.
*/
void cmd_change(const char* path, int size)
{
struct stat st;
if (!size)
return;
if (lstat(path, &st) != 0) {
/* LCOV_EXCL_START */
log_fatal("Error accessing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
if (S_ISLNK(st.st_mode)) {
/* symlink */
if (rnd(2) == 0) {
/* delete */
if (remove(path) != 0) {
/* LCOV_EXCL_START */
log_fatal("Error removing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
} else {
/* recreate */
char linkto[PATH_MAX];
if (remove(path) != 0) {
/* LCOV_EXCL_START */
log_fatal("Error removing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
rnd_name(linkto);
cmd_generate_symlink(path, linkto);
}
} else if (S_ISREG(st.st_mode)) {
int r;
r = rnd(4);
if (r == 0) {
cmd_write(path, size);
} else if (r == 1) {
cmd_append(path, size);
} else if (r == 2) {
cmd_truncate(path, size);
} else {
cmd_delete(path);
}
}
}
void change(const char* path, int size)
{
struct stat st;
if (!size)
return;
if (lstat(path, &st) != 0) {
if (errno == ENOENT)
return; /* it may be already deleted */
/* LCOV_EXCL_START */
fprintf(stderr, "Error accessing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
if (S_ISLNK(st.st_mode)) {
/* symlink */
if (rnd(2) == 0) {
/* delete */
if (remove(path) != 0) {
/* LCOV_EXCL_START */
fprintf(stderr, "Error removing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
} else {
/* recreate */
char linkto[PATH_MAX];
if (remove(path) != 0) {
/* LCOV_EXCL_START */
fprintf(stderr, "Error removing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
rnd_name(linkto);
create_symlink(path, linkto);
}
} else if (S_ISREG(st.st_mode)) {
int r;
r = rnd(4);
if (r == 0) {
/* write */
writ(path, size, 0);
} else if (r == 1) {
/* append */
append(path, size);
} else if (r == 2) {
/* truncate */
truncat(path, size);
} else {
/* delete */
if (remove(path) != 0) {
/* LCOV_EXCL_START */
fprintf(stderr, "Error removing %s\n", path);
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
}
}
}