[BUG] Fails to build on riscv64

[Civil]

Describe the bug

RISC-V 64 as an ARM64 do not have Dup2 syscall, but have Dup3 syscall. This is used by a dependency of go-carbon: https://github.com/sevlyar/go-daemon

I've opened a bug in that repo about specific build failure, but project looks dead (author's account on github is inactive for more than a year, last commit to that particular repo was 2+ years ago) so that would require either a fork to fix or migrating away from go-daemon for daemonization.

Otherwise patch to fix that is rather simple:

diff --git a/vendor/github.com/sevlyar/go-daemon/syscall_dup.go b/vendor/github.com/sevlyar/go-daemon/syscall_dup.go
index e572101..2e0c583 100644
--- a/vendor/github.com/sevlyar/go-daemon/syscall_dup.go
+++ b/vendor/github.com/sevlyar/go-daemon/syscall_dup.go
@@ -1,4 +1,5 @@
 // +build !linux !arm64
+// +build !linux !riscv64
 // +build !windows
 
 package daemon
diff --git a/vendor/github.com/sevlyar/go-daemon/syscall_dup_arm64.go b/vendor/github.com/sevlyar/go-daemon/syscall_dup_new.go
similarity index 85%
rename from vendor/github.com/sevlyar/go-daemon/syscall_dup_arm64.go
rename to vendor/github.com/sevlyar/go-daemon/syscall_dup_new.go
index af00cd2..2c255a5 100644
--- a/vendor/github.com/sevlyar/go-daemon/syscall_dup_arm64.go
+++ b/vendor/github.com/sevlyar/go-daemon/syscall_dup_new.go
@@ -1,5 +1,5 @@
-// +build linux,arm64
-
+// +build linux
+// +build arm64 riscv64
 package daemon
 
 import "syscall"
--

[Civil]

Also I'd like to note that with distros that uses systemd (which are all major distors that are still supported) there is no need in daemonization on application level (you can safely remove -daemon from systemd sample unit and switch type to Simple). And for those that do not use systemd it might be better to suggest to use start-stop-daemon or something similar.

[deniszh]

Thanks for investigation and fix, @Civil! I do not think that we should remove daemonizing, though, it can be fixed in fork. But I try to reach @sevlyar before doing so.

[deniszh]

Fixed in #411