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Several improvements

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This commit is contained in:
topjohnwu
2019-03-31 06:32:33 -04:00
parent cd6bcb97ef
commit 0149b1368d
3 changed files with 30 additions and 47 deletions
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45
native/jni/utils/file.cpp
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@@ -17,16 +17,6 @@
using namespace std;
const char **excl_list = nullptr;
static int is_excl(const char *name) {
if (excl_list)
for (int i = 0; excl_list[i]; ++i)
if (strcmp(name, excl_list[i]) == 0)
return 1;
return 0;
}
ssize_t fd_path(int fd, char *path, size_t size) {
snprintf(path, size, "/proc/self/fd/%d", fd);
return xreadlink(path, path, size);
@@ -62,7 +52,15 @@ int mkdirs(const char *pathname, mode_t mode) {
return 0;
}
void post_order_walk(int dirfd, void (*fn)(int, struct dirent *)) {
static bool is_excl(initializer_list<const char *> excl, const char *name) {
for (auto item : excl)
if (strcmp(item, name) == 0)
return true;
return false;
}
static void post_order_walk(int dirfd, initializer_list<const char *> excl,
int (*fn)(int, struct dirent *)) {
struct dirent *entry;
int newfd;
DIR *dir = fdopendir(dirfd);
@@ -71,17 +69,21 @@ void post_order_walk(int dirfd, void (*fn)(int, struct dirent *)) {
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (is_excl(entry->d_name))
if (is_excl(excl, entry->d_name))
continue;
if (entry->d_type == DT_DIR) {
newfd = xopenat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
post_order_walk(newfd, fn);
post_order_walk(newfd, excl, fn);
close(newfd);
}
fn(dirfd, entry);
}
}
static int remove_at(int dirfd, struct dirent *entry) {
return unlinkat(dirfd, entry->d_name, entry->d_type == DT_DIR ? AT_REMOVEDIR : 0);
}
void rm_rf(const char *path) {
struct stat st;
if (lstat(path, &st) < 0)
@@ -94,10 +96,8 @@ void rm_rf(const char *path) {
remove(path);
}
void frm_rf(int dirfd) {
post_order_walk(dirfd, [](auto dirfd, auto entry) -> void {
unlinkat(dirfd, entry->d_name, entry->d_type == DT_DIR ? AT_REMOVEDIR : 0);
});
void frm_rf(int dirfd, initializer_list<const char *> excl) {
post_order_walk(dirfd, excl, remove_at);
}
/* This will only on the same file system */
@@ -134,8 +134,6 @@ void mv_dir(int src, int dest) {
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (is_excl(entry->d_name))
continue;
getattrat(src, entry->d_name, &a);
switch (entry->d_type) {
case DT_DIR:
@@ -186,7 +184,7 @@ void cp_afc(const char *source, const char *destination) {
setattr(destination, &a);
}
void clone_dir(int src, int dest) {
void clone_dir(int src, int dest, bool overwrite) {
struct dirent *entry;
DIR *dir;
int srcfd, destfd, newsrc, newdest;
@@ -197,7 +195,8 @@ void clone_dir(int src, int dest) {
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (is_excl(entry->d_name))
if (struct stat st; !overwrite &&
fstatat(dest, entry->d_name, &st, AT_SYMLINK_NOFOLLOW) == 0)
continue;
getattrat(src, entry->d_name, &a);
switch (entry->d_type) {
@@ -206,7 +205,7 @@ void clone_dir(int src, int dest) {
setattrat(dest, entry->d_name, &a);
newsrc = xopenat(src, entry->d_name, O_RDONLY | O_CLOEXEC);
newdest = xopenat(dest, entry->d_name, O_RDONLY | O_CLOEXEC);
clone_dir(newsrc, newdest);
clone_dir(newsrc, newdest, overwrite);
close(newsrc);
close(newdest);
break;
@@ -237,8 +236,6 @@ void link_dir(int src, int dest) {
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (is_excl(entry->d_name))
continue;
if (entry->d_type == DT_DIR) {
getattrat(src, entry->d_name, &a);
xmkdirat(dest, entry->d_name, a.st.st_mode & 0777);