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Message-Id: <20190730200114.21078-1-ismael@iodev.co.uk>
Date: Tue, 30 Jul 2019 22:01:14 +0200
From: Ismael Luceno <ismael@...ev.co.uk>
To: musl@...ts.openwall.com
Cc: Ismael Luceno <ismael@...ev.co.uk>
Subject: [RFC PATCH] glob: implement GLOB_ALTDIRFUNC et al
Signed-off-by: Ismael Luceno <ismael@...ev.co.uk>
---
include/glob.h | 8 +++++++-
src/regex/glob.c | 31 ++++++++++++++++++++++---------
2 files changed, 29 insertions(+), 10 deletions(-)
diff --git a/include/glob.h b/include/glob.h
index 0ff70bdfeef2..0db4780f6a00 100644
--- a/include/glob.h
+++ b/include/glob.h
@@ -16,7 +16,12 @@ typedef struct {
char **gl_pathv;
size_t gl_offs;
int __dummy1;
- void *__dummy2[5];
+
+ void (*gl_closedir)(void *);
+ struct dirent *(*gl_readdir)(void *);
+ void *(*gl_opendir)(const char *);
+ int (*gl_lstat)(const char *__restrict, struct stat *__restrict);
+ int (*gl_stat)(const char *__restrict, struct stat *__restrict);
} glob_t;
int glob(const char *__restrict, int, int (*)(const char *, int), glob_t *__restrict);
@@ -31,6 +36,7 @@ void globfree(glob_t *);
#define GLOB_NOESCAPE 0x40
#define GLOB_PERIOD 0x80
+#define GLOB_ALTDIRFUNC 0x0200
#define GLOB_NOMAGIC 0x0800
#define GLOB_TILDE 0x1000
#define GLOB_TILDE_CHECK 0x4000
diff --git a/src/regex/glob.c b/src/regex/glob.c
index 0ccd9759c5e7..a79454223236 100644
--- a/src/regex/glob.c
+++ b/src/regex/glob.c
@@ -1,7 +1,7 @@
#define _BSD_SOURCE
+#include <sys/stat.h>
#include <glob.h>
#include <fnmatch.h>
-#include <sys/stat.h>
#include <dirent.h>
#include <limits.h>
#include <string.h>
@@ -32,7 +32,7 @@ static int append(struct match **tail, const char *name, size_t len, int mark)
return 0;
}
-static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*errfunc)(const char *path, int err), struct match **tail)
+static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*errfunc)(const char *path, int err), glob_t *restrict g, struct match **tail)
{
/* If GLOB_MARK is unused, we don't care about type. */
if (!type && !(flags & GLOB_MARK)) type = DT_REG;
@@ -96,7 +96,7 @@ static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*
* determine its type. */
struct stat st;
if ((flags & GLOB_MARK) && type==DT_LNK) type = 0;
- if (!type && stat(buf, &st)) {
+ if (!type && g->gl_stat(buf, &st)) {
if (errno!=ENOENT && (errfunc(buf, errno) || (flags & GLOB_ERR)))
return GLOB_ABORTED;
return 0;
@@ -117,7 +117,7 @@ static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*
saved_sep = '\\';
}
}
- DIR *dir = opendir(pos ? buf : ".");
+ DIR *dir = g->gl_opendir(pos ? buf : ".");
if (!dir) {
if (errfunc(buf, errno) || (flags & GLOB_ERR))
return GLOB_ABORTED;
@@ -125,7 +125,7 @@ static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*
}
int old_errno = errno;
struct dirent *de;
- while (errno=0, de=readdir(dir)) {
+ while (errno=0, de=g->gl_readdir(dir)) {
/* Quickly skip non-directories when there's pattern left. */
if (p2 && de->d_type && de->d_type!=DT_DIR && de->d_type!=DT_LNK)
continue;
@@ -150,15 +150,15 @@ static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*
memcpy(buf+pos, de->d_name, l+1);
if (p2) *p2 = saved_sep;
- int r = do_glob(buf, pos+l, de->d_type, p2 ? p2 : "", flags, errfunc, tail);
+ int r = do_glob(buf, pos+l, de->d_type, p2 ? p2 : "", flags, errfunc, g, tail);
if (r) {
- closedir(dir);
+ g->gl_closedir(dir);
return r;
}
}
int readerr = errno;
if (p2) *p2 = saved_sep;
- closedir(dir);
+ g->gl_closedir(dir);
if (readerr && (errfunc(buf, errno) || (flags & GLOB_ERR)))
return GLOB_ABORTED;
errno = old_errno;
@@ -217,6 +217,11 @@ static int expand_tilde(char **pat, char *buf, size_t *pos)
return 0;
}
+static void __gl_closedir(void *p)
+{
+ closedir(p);
+}
+
int glob(const char *restrict pat, int flags, int (*errfunc)(const char *path, int err), glob_t *restrict g)
{
struct match head = { .next = NULL }, *tail = &head;
@@ -227,6 +232,14 @@ int glob(const char *restrict pat, int flags, int (*errfunc)(const char *path, i
if (!errfunc) errfunc = ignore_err;
+ if (!(flags & GLOB_ALTDIRFUNC)) {
+ g->gl_opendir = (void *(*)(const char *))opendir;
+ g->gl_readdir = (struct dirent *(*)(void *))readdir;
+ g->gl_closedir = __gl_closedir;
+ g->gl_lstat = lstat;
+ g->gl_stat = stat;
+ }
+
if (!(flags & GLOB_APPEND)) {
g->gl_offs = offs;
g->gl_pathc = 0;
@@ -242,7 +255,7 @@ int glob(const char *restrict pat, int flags, int (*errfunc)(const char *path, i
if ((flags & (GLOB_TILDE | GLOB_TILDE_CHECK)) && *p == '~')
error = expand_tilde(&s, buf, &pos);
if (!error)
- error = do_glob(buf, pos, 0, s, flags, errfunc, &tail);
+ error = do_glob(buf, pos, 0, s, flags, errfunc, g, &tail);
free(p);
}
--
2.22.0
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