git-daemon not consulting ~/.gitconfig

[martin f krafft <madduck@xxxxxxxxxxx>]

Hello,

I found that git-daemon stopped serving repositories managed by 
gitolite, i.e. by a different Unix user. Hence, no big surprise that 
I would get

```
git-daemon[3126249]: detected dubious ownership in repository at '/srv/git/repositories/madduck/pub/etc/ssh.git'
                     To add an exception for this directory, call:
                     git config --global --add safe.directory /srv/git/repositories/madduck/pub/etc/ssh.git
```

in the logs. However, adding the config to `~gitdaemon/.gitconfig` 
did not have the desired effect. Neither did adding it to 
`~root/.gitconfig` and only `/etc/gitconfig` works.

So I checked `strace` and found that when invoked by `git-daemon`, 
Git doesn't even consult `~/.gitconfig`, and I think this may be a 
bug.

Here is the relevant strace for an access to git-daemon that 
triggers the above
error:

```
root@alan:~# strace -fp 3146653 -e file 2>&1 | grep config
[pid 3154713] access("/etc/gitconfig", R_OK) = 0
[pid 3154713] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 3
[pid 3154713] access("/etc/gitconfig", R_OK) = 0
[pid 3154713] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 4
[pid 3154713] openat(AT_FDCWD, "./config", O_RDONLY) = 4
[pid 3154713] access("/etc/gitconfig", R_OK) = 0
[pid 3154713] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 4
[pid 3154713] access("config", R_OK)    = 0
[pid 3154713] openat(AT_FDCWD, "config", O_RDONLY) = 4
[pid 3154714] access("/etc/gitconfig", R_OK) = 0
[pid 3154714] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 3
[pid 3154714] access("/etc/gitconfig", R_OK) = 0
[pid 3154714] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 3
[pid 3154714] openat(AT_FDCWD, "./config", O_RDONLY) = 3
[pid 3154714] access("/etc/gitconfig", R_OK) = 0
[pid 3154714] openat(AT_FDCWD, "/etc/gitconfig", O_RDONLY) = 3
[pid 3154714] access("config", R_OK)    = 0
[pid 3154714] openat(AT_FDCWD, "config", O_RDONLY) = 3
```

[System Info]
git version:
git version 2.39.5
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
uname: Linux 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64
compiler info: gnuc: 12.2
libc info: glibc: 2.36
$SHELL (typically, interactive shell): /bin/bash


--
martin krafft | https://matrix.to/#/#madduck:madduck.net

officer, arrest that man! he's whistling a copyrighted song.
{: .blockquote }

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