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dir.c: fix glob with base when no DT_UNKNOWN

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* dir.c (do_stat, do_lstat, do_opendir): need the length of the base
  path for fstatat() when fd is valid.

* dir.c (glob_helper): fix for platforms where DT_UNKNOWN is not
  available, e.g. Solaris.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64067 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-07-26 12:48:02 +00:00
parent f6ae1ed6ec
commit 2bfc133477
1 changed files with 27 additions and 18 deletions
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45
dir.c
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@ -1378,12 +1378,24 @@ typedef struct {
ruby_glob_errfunc *error;
} ruby_glob_funcs_t;
/* System call with warning */
static int
do_stat(int fd, const char *path, struct stat *pst, int flags, rb_encoding *enc)
static const char *
at_subpath(int fd, size_t baselen, const char *path)
{
#if USE_OPENDIR_AT
int ret = fstatat(fd, path, pst, 0);
if (fd != (int)AT_FDCWD && baselen > 0) {
path += baselen;
if (*path == '/') ++path;
}
#endif
return *path ? path : ".";
}
/* System call with warning */
static int
do_stat(int fd, size_t baselen, const char *path, struct stat *pst, int flags, rb_encoding *enc)
{
#if USE_OPENDIR_AT
int ret = fstatat(fd, at_subpath(fd, baselen, path), pst, 0);
#else
int ret = STAT(path, pst);
#endif
@ -1395,10 +1407,10 @@ do_stat(int fd, const char *path, struct stat *pst, int flags, rb_encoding *enc)
#if defined HAVE_LSTAT || defined lstat || USE_OPENDIR_AT
static int
do_lstat(int fd, const char *path, struct stat *pst, int flags, rb_encoding *enc)
do_lstat(int fd, size_t baselen, const char *path, struct stat *pst, int flags, rb_encoding *enc)
{
#if USE_OPENDIR_AT
int ret = fstatat(fd, path, pst, AT_SYMLINK_NOFOLLOW);
int ret = fstatat(fd, at_subpath(fd, baselen, path), pst, AT_SYMLINK_NOFOLLOW);
#else
int ret = lstat(path, pst);
#endif
@ -1488,7 +1500,7 @@ opendir_at(int basefd, const char *path)
}
static DIR *
do_opendir(const int basefd, const char *path, int flags, rb_encoding *enc,
do_opendir(const int basefd, size_t baselen, const char *path, int flags, rb_encoding *enc,
ruby_glob_errfunc *errfunc, VALUE arg, int *status)
{
DIR *dirp;
@ -1500,7 +1512,7 @@ do_opendir(const int basefd, const char *path, int flags, rb_encoding *enc,
path = RSTRING_PTR(tmp);
}
#endif
dirp = opendir_at(basefd, path);
dirp = opendir_at(basefd, at_subpath(basefd, baselen, path));
if (!dirp) {
int e = errno;
@ -2010,9 +2022,6 @@ glob_helper(
int plain = 0, magical = 0, recursive = 0, match_all = 0, match_dir = 0;
int escape = !(flags & FNM_NOESCAPE);
size_t pathlen = baselen + namelen;
const char *base = path;
if (fd != AT_FDCWD && *(base += baselen) == '/') base++;
for (cur = beg; cur < end; ++cur) {
struct glob_pattern *p = *cur;
@ -2045,9 +2054,9 @@ glob_helper(
}
}
if (*base) {
if (*path) {
if (match_all && pathtype == path_unknown) {
if (do_lstat(fd, base, &st, flags, enc) == 0) {
if (do_lstat(fd, baselen, path, &st, flags, enc) == 0) {
pathtype = IFTODT(st.st_mode);
}
else {
@ -2055,7 +2064,7 @@ glob_helper(
}
}
if (match_dir && (pathtype == path_unknown || pathtype == path_symlink)) {
if (do_stat(fd, base, &st, flags, enc) == 0) {
if (do_stat(fd, baselen, path, &st, flags, enc) == 0) {
pathtype = IFTODT(st.st_mode);
}
else {
@ -2091,14 +2100,14 @@ glob_helper(
if (cur + 1 == end && (*cur)->type <= ALPHA) {
plainname = join_path(path, pathlen, dirsep, (*cur)->str, strlen((*cur)->str));
if (!plainname) return -1;
dirp = do_opendir(fd, plainname, flags, enc, funcs->error, arg, &status);
dirp = do_opendir(fd, basename, plainname, flags, enc, funcs->error, arg, &status);
GLOB_FREE(plainname);
}
else
# else
;
# endif
dirp = do_opendir(fd, *base ? base : ".", flags, enc, funcs->error, arg, &status);
dirp = do_opendir(fd, baselen, path, flags, enc, funcs->error, arg, &status);
if (dirp == NULL) {
# if FNM_SYSCASE || NORMALIZE_UTF8PATH
if ((magical < 2) && !recursive && (errno == EACCES)) {
@ -2108,7 +2117,7 @@ glob_helper(
# endif
return status;
}
IF_NORMALIZE_UTF8PATH(norm_p = need_normalization(dirp, *base ? base : "."));
IF_NORMALIZE_UTF8PATH(norm_p = need_normalization(dirp, *path ? path : "."));
# if NORMALIZE_UTF8PATH
if (!(norm_p || magical || recursive)) {
@ -2167,7 +2176,7 @@ glob_helper(
if (recursive && dotfile < ((flags & FNM_DOTMATCH) ? 2 : 1) &&
new_pathtype == path_unknown) {
/* RECURSIVE never match dot files unless FNM_DOTMATCH is set */
if (do_lstat(fd, buf, &st, flags, enc) == 0)
if (do_lstat(fd, baselen, buf, &st, flags, enc) == 0)
new_pathtype = IFTODT(st.st_mode);
else
new_pathtype = path_noent;