Uci fails on symlink?

[PolynomialDivision]

I symlinked ln -s configurations into ram:

lrwxrwxrwx    1 root     root            15 Jan  8 20:31 babeld -> /var/run/babeld
lrwxrwxrwx    1 root     root            14 Jan  8 20:31 olsrd -> /var/run/olsrd

However, if I do now:

root@xxx:/etc/config# uci add babeld interface
cfg0b6d96
root@xxx:/etc/config# uci set babeld.@interface[-1].ifname="wg_51234"
root@xxx:/etc/config# uci commit
uci: I/O error

What's wrong?

Similar:

UCI set for a file in a different directory other than /etc/config

Had to use the below command uci -p /tmp/ set abc.@test[0].xyz=20 Able to set and the updated value is shown using uci changes. When i tried to commit the chnages using uci commit, it rejects with uci: I/O error .

Probably related:
https://git.openwrt.org/?p=project/uci.git;a=blob;f=delta.c;h=d8bd3a6ccae8d0a6330c9660b3b5ee294cda1a3c;hb=HEAD#l475

[PolynomialDivision]

Just running debug and adding some debug output, will lead in a lot of errors:

diff --git a/util.c b/util.c
index 61e42cd..709b92e 100644
--- a/util.c
+++ b/util.c
@@ -211,6 +211,8 @@ __private FILE *uci_open_stream(struct uci_context *ctx, const char *filename, c
 
        if (!write && ((stat(filename, &statbuf) < 0) ||
                ((statbuf.st_mode & S_IFMT) != S_IFREG))) {
+               fprintf(stderr, "Filename: %s\n", filename);
+               fprintf(stderr, "statbuf: %d\n", statbuf.st_mode);
                UCI_THROW(ctx, UCI_ERR_NOTFOUND);
        }
 

Filename: /tmp/.uci/dropbear
statbuf: 0
Exception: UCI_ERR_NOTFOUND in uci_open_stream, uci-2021-10-22-f84f49f0/util.c:216
Exception: UCI_ERR_IO in uci_open_stream, uci-2021-10-22-f84f49f0/util.c:241

[PolynomialDivision]

I found a solution:

wg-installer: fix using symlinks for conf files

However, it feels more like a workaround.