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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 09/19] glob: do not unnecessarily opendir() a directory
Date: Tue,  3 Apr 2018 09:48:41 +0200	[thread overview]
Message-ID: <20180403074851.5411-10-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20180403074851.5411-1-s.hauer@pengutronix.de>

opendir() can trigger automounts, so do not use it when the
pattern we examine doesn't have any wildcards.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 lib/glob.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/lib/glob.c b/lib/glob.c
index 5a997ca092..32f7afdce8 100644
--- a/lib/glob.c
+++ b/lib/glob.c
@@ -313,7 +313,7 @@ static int prefix_array(const char *dirname, char **array, size_t n,
 static int glob_in_dir(const char *pattern, const char *directory,
 		int flags, int (*errfunc) __P((const char *, int)), glob_t *pglob)
 {
-	__ptr_t stream;
+	__ptr_t stream = NULL;
 
 	struct globlink {
 		struct globlink *next;
@@ -323,7 +323,13 @@ static int glob_in_dir(const char *pattern, const char *directory,
 	size_t nfound = 0;
 	int meta;
 
-	stream = opendir(directory);
+	meta = glob_pattern_p(pattern, !(flags & GLOB_NOESCAPE));
+
+	if (meta)
+		flags |= GLOB_MAGCHAR;
+
+	if (meta)
+		stream = opendir(directory);
 
 	if (stream == NULL) {
 		if ((errfunc != NULL && (*errfunc) (directory, errno)) ||
@@ -331,11 +337,6 @@ static int glob_in_dir(const char *pattern, const char *directory,
 			return GLOB_ABORTED;
 	}
 
-	meta = glob_pattern_p(pattern, !(flags & GLOB_NOESCAPE));
-
-	if (meta)
-		flags |= GLOB_MAGCHAR;
-
 	while (1) {
 		const char *name;
 		size_t len;
-- 
2.16.1


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  parent reply	other threads:[~2018-04-03  7:49 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-03  7:48 [PATCH 00/19] Add Linux dcache implementation Sascha Hauer
2018-04-03  7:48 ` [PATCH 01/19] rename file_operations -> cdev_operations Sascha Hauer
2018-04-03  7:48 ` [PATCH 02/19] ubifs: remove dead code Sascha Hauer
2018-04-03  7:48 ` [PATCH 03/19] ubifs: Remove Linux struct definitions we already have Sascha Hauer
2018-04-03  7:48 ` [PATCH 04/19] ubifs: remove dead code Sascha Hauer
2018-04-03  7:48 ` [PATCH 05/19] fs: Add super_operations Sascha Hauer
2018-04-03  7:48 ` [PATCH 06/19] fs: Move mem_write/mem_read to devfs-core Sascha Hauer
2018-04-03  7:48 ` [PATCH 07/19] fs: Cleanup whitespace damage Sascha Hauer
2018-04-03  7:48 ` [PATCH 08/19] fs: Fix finding correct directory for mkdir/rmdir Sascha Hauer
2018-04-03  7:48 ` Sascha Hauer [this message]
2018-04-03  7:48 ` [PATCH 10/19] ls: Do not depend on normalise_path() Sascha Hauer
2018-04-03  7:48 ` [PATCH 11/19] loadenv: " Sascha Hauer
2018-04-03  7:48 ` [PATCH 12/19] fs: dcache implementation Sascha Hauer
2018-04-03  7:48 ` [PATCH 13/19] fs: ramfs: Switch to " Sascha Hauer
2018-04-03  7:48 ` [PATCH 14/19] fs: devfs: " Sascha Hauer
2018-04-03  7:48 ` [PATCH 15/19] fs: ext4: " Sascha Hauer
2018-04-03  7:48 ` [PATCH 16/19] fs: ubifs: " Sascha Hauer
2018-04-03  7:48 ` [PATCH 17/19] fs: nfs: " Sascha Hauer
2018-04-03  7:48 ` [PATCH 18/19] fs: tftp: " Sascha Hauer
2018-05-18 11:54   ` Philipp Zabel
2018-05-22  7:12     ` Sascha Hauer
2018-05-22  8:21       ` Philipp Zabel
2018-04-03  7:48 ` [PATCH 19/19] block: Adjust cache sizes Sascha Hauer

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