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84 lines
2.1 KiB
84 lines
2.1 KiB
1 year ago
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From ee9dcf9549e8cbfeb51123812776cc87016c95b0 Mon Sep 17 00:00:00 2001
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From: Mateusz Grzonka <mateusz.grzonka@intel.com>
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Date: Thu, 2 Feb 2023 12:27:02 +0100
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Subject: [PATCH 090/125] Add helpers to determine whether directories or files
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are soft links
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Signed-off-by: Mateusz Grzonka <mateusz.grzonka@intel.com>
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Acked-by: Coly Li <colyli@suse.de>
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Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
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---
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mdadm.h | 2 ++
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util.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 47 insertions(+)
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diff --git a/mdadm.h b/mdadm.h
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index 13f8b4cb..1674ce13 100644
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--- a/mdadm.h
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+++ b/mdadm.h
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@@ -1777,6 +1777,8 @@ extern void set_dlm_hooks(void);
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#define MSEC_TO_NSEC(msec) ((msec) * 1000000)
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#define USEC_TO_NSEC(usec) ((usec) * 1000)
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extern void sleep_for(unsigned int sec, long nsec, bool wake_after_interrupt);
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+extern bool is_directory(const char *path);
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+extern bool is_file(const char *path);
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#define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1))
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#define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base))
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diff --git a/util.c b/util.c
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index 8c7f3fd5..7fc881bf 100644
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--- a/util.c
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+++ b/util.c
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@@ -2401,3 +2401,48 @@ void sleep_for(unsigned int sec, long nsec, bool wake_after_interrupt)
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}
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} while (!wake_after_interrupt && errno == EINTR);
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}
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+
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+/* is_directory() - Checks if directory provided by path is indeed a regular directory.
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+ * @path: directory path to be checked
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+ *
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+ * Doesn't accept symlinks.
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+ *
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+ * Return: true if is a directory, false if not
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+ */
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+bool is_directory(const char *path)
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+{
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+ struct stat st;
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+
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+ if (lstat(path, &st) != 0) {
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+ pr_err("%s: %s\n", strerror(errno), path);
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+ return false;
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+ }
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+
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+ if (!S_ISDIR(st.st_mode))
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+ return false;
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+
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+ return true;
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+}
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+
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+/*
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+ * is_file() - Checks if file provided by path is indeed a regular file.
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+ * @path: file path to be checked
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+ *
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+ * Doesn't accept symlinks.
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+ *
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+ * Return: true if is a file, false if not
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+ */
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+bool is_file(const char *path)
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+{
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+ struct stat st;
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+
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+ if (lstat(path, &st) != 0) {
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+ pr_err("%s: %s\n", strerror(errno), path);
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+ return false;
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+ }
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+
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+ if (!S_ISREG(st.st_mode))
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+ return false;
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+
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+ return true;
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+}
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--
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2.38.1
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