File 0115-btrfs-progs-fixup-is_mounted-checks.patch of Package btrfsprogs

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File 0115-btrfs-progs-fixup-is_mounted-checks.patch of Package btrfsprogs

From 6ca37050db7e94257559da2b8e8009c2347ed798 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 27 Oct 2011 16:23:14 -0400
Subject: [PATCH 16/35] btrfs-progs: fixup is_mounted checks

/proc/mounts contains device names that don't exist,
we end up erroring out because we're not able to stat
the device (that doesn't exist).

Fix this by allowing the mkfs when the target device doesn't exist.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 utils.c |   34 +++++++++++++++++++---------------
 1 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/utils.c b/utils.c
index 1c27e14..6c96548 100644
--- a/utils.c
+++ b/utils.c
@@ -674,11 +674,11 @@ int is_same_blk_file(const char* a, const char* b)
 	char real_a[PATH_MAX];
 	char real_b[PATH_MAX];
 
-	if(!realpath(a, real_a) ||
-	   !realpath(b, real_b))
-	{
-		return -errno;
-	}
+	if(!realpath(a, real_a))
+		strcpy(real_a, a);
+
+	if (!realpath(b, real_b))
+		strcpy(real_b, b);
 
 	/* Identical path? */
 	if(strcmp(real_a, real_b) == 0)
@@ -719,8 +719,8 @@ int is_same_loop_file(const char* a, const char* b)
 {
 	char res_a[PATH_MAX];
 	char res_b[PATH_MAX];
-	const char* final_a;
-	const char* final_b;
+	const char* final_a = NULL;
+	const char* final_b = NULL;
 	int ret;
 
 	/* Resolve a if it is a loop device */
@@ -729,10 +729,12 @@ int is_same_loop_file(const char* a, const char* b)
 			return 0;
 		return ret;
 	} else if (ret) {
-		if ((ret = resolve_loop_device(a, res_a, sizeof(res_a))) < 0)
-			return ret;
-
-		final_a = res_a;
+		if ((ret = resolve_loop_device(a, res_a, sizeof(res_a))) < 0) {
+			if (errno != EPERM)
+				return ret;
+		}
+		else
+			final_a = res_a;
 	} else {
 		final_a = a;
 	}
@@ -743,10 +745,12 @@ int is_same_loop_file(const char* a, const char* b)
 			return 0;
 		return ret;
 	} else if (ret) {
-		if((ret = resolve_loop_device(b, res_b, sizeof(res_b))) < 0)
-			return ret;
-
-		final_b = res_b;
+		if ((ret = resolve_loop_device(b, res_b, sizeof(res_b))) < 0) {
+			if (errno != EPERM)
+				return ret;
+		}
+		else
+			final_b = res_b;
 	} else {
 		final_b = b;
 	}
-- 
1.7.6.233.gd79bc

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File 0115-btrfs-progs-fixup-is_mounted-checks.patch of Package btrfsprogs

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