From: KyleMahlkuch <Kyle.Mahlkuch@xxxxxxx>
The current code assumes "-part" is the only partition sepereator
but this is not true for some distros.
For example in Ubuntu 18.04 fdisk does not print the correct names for
mpatha:
~# ls -l /dev/mapper/mpatha*
lrwxrwxrwx 1 root root 7 Feb 1 04:39 /dev/mapper/mpatha -> ../dm-0
lrwxrwxrwx 1 root root 7 Feb 1 04:38 /dev/mapper/mpatha1 -> ../dm-4
lrwxrwxrwx 1 root root 7 Feb 1 04:38 /dev/mapper/mpatha2 -> ../dm-5
lrwxrwxrwx 1 root root 7 Feb 1 04:38 /dev/mapper/mpatha3 -> ../dm-6
~# fdisk -l /dev/mapper/mpatha
Device Boot Start End Sectors Size Id Type
/dev/mapper/mpatha-part1 2048 419432447 419430400 200G 83 Linux
/dev/mapper/mpatha-part2 419432448 838862847 419430400 200G 83 Linux
/dev/mapper/mpatha-part3 838862848 1258291199 419428352 200G 83 Linux
Instead of assuming a partition seperator of "-part" this patch uses
access to check the file system for a partition seperator of "p" or
the absense of a partition seperator. If neither of these work the patch
defaults to "-part" like we had before this patch.
---
libfdisk/src/utils.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/libfdisk/src/utils.c b/libfdisk/src/utils.c
index 5ba9e04..54e28b2 100644
--- a/libfdisk/src/utils.c
+++ b/libfdisk/src/utils.c
@@ -153,7 +153,20 @@ char *fdisk_partname(const char *dev, size_t partno)
if ((strncmp(dev, _PATH_DEV_BYID, sizeof(_PATH_DEV_BYID) - 1) == 0) ||
strncmp(dev, _PATH_DEV_BYPATH, sizeof(_PATH_DEV_BYPATH) - 1) == 0 ||
strncmp(dev, "/dev/mapper", sizeof("/dev/mapper") - 1) == 0) {
- p = "-part";
+ asprintf(&res, "%.*s%zu", w, dev, partno);
+ if (access(res, F_OK) == 0){
+ p = "";
+ } else {
+ /* check for partition seperator "p" */
+ p = "p";
+ free(res);
+ asprintf(&res, "%.*s%s%zu", w, dev, p, partno);
+ if (access(res, F_OK) != 0){
+ /* otherwise, default to "-path" */
+ p = "-part";
+ }
+ }
+ free(res);
}
if (asprintf(&res, "%.*s%s%zu", w, dev, p, partno) <= 0)
--
1.8.3.1
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