[PATCH 05/13] erofs-utils: lib: keep self maintained devname

[Jingbo Xu]

Keep self allocated and maintained devname in erofs_sb_info.

Signed-off-by: Jingbo Xu <jefflexu at linux.alibaba.com>
---
 include/erofs/internal.h |  2 +-
 lib/io.c                 | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index a04e6a6..892dc96 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -61,7 +61,7 @@ struct erofs_device_info {
 
 struct erofs_sb_info {
 	struct erofs_device_info *devs;
-	const char *devname;
+	char *devname;
 
 	u64 total_blocks;
 	u64 primarydevice_blocks;
diff --git a/lib/io.c b/lib/io.c
index 8d84de2..1545436 100644
--- a/lib/io.c
+++ b/lib/io.c
@@ -10,6 +10,7 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
+#include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include "erofs/io.h"
@@ -46,6 +47,7 @@ static int dev_get_blkdev_size(int fd, u64 *bytes)
 void dev_close(struct erofs_sb_info *sbi)
 {
 	close(sbi->devfd);
+	free(sbi->devname);
 	sbi->devname = NULL;
 	sbi->devfd   = -1;
 	sbi->devsz   = 0;
@@ -95,7 +97,11 @@ int dev_open(struct erofs_sb_info *sbi, const char *dev)
 		return -EINVAL;
 	}
 
-	sbi->devname = dev;
+	sbi->devname = strdup(dev);
+	if (!sbi->devname) {
+		close(fd);
+		return -ENOMEM;
+	}
 	sbi->devfd = fd;
 
 	erofs_info("successfully to open %s", dev);
@@ -136,8 +142,12 @@ int dev_open_ro(struct erofs_sb_info *sbi, const char *dev)
 		return -errno;
 	}
 
+	sbi->devname = strdup(dev);
+	if (!sbi->devname) {
+		close(fd);
+		return -ENOMEM;
+	}
 	sbi->devfd = fd;
-	sbi->devname = dev;
 	sbi->devsz = INT64_MAX;
 	return 0;
 }
-- 
2.19.1.6.gb485710b