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Implement BSD specific sys_ExecutablePathname

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This is more reliable than argv[0] which is effectively used via
unix_ExecutablePathname. Also drop the fallback as it effectively is the
same as the generic fallback and blocks making cxxtest optional.

On FreeBSD the procfs is not mounted by default, so use a syscall
instead.

Refs: #8618
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
This commit is contained in:
Ralph Sennhauser 2025-12-20 14:04:35 +01:00
parent 349478aa6b
commit ae6d3bfc4e
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1 changed files with 29 additions and 3 deletions
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32
source/lib/sysdep/os/bsd/bsd.cpp
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@ -1,4 +1,4 @@
/* Copyright (C) 2014 Wildfire Games.
/* Copyright (C) 2026 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
@ -23,9 +23,35 @@
#include "precompiled.h"
#include "lib/sysdep/sysdep.h"
#include "lib/sysdep/os/unix/unix_executable_pathname.h"
#include <climits>
#if defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/sysctl.h>
#else
#include <stdlib.h>
#endif
/**
* Get the path to the executable
*
* In FreeBSD the procfs isn't available by default so use a system call instead.
*/
OsPath sys_ExecutablePathname()
{
return unix_ExecutablePathname();
char pathBuffer[PATH_MAX];
#if defined(__FreeBSD__)
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
size_t length = sizeof(pathBuffer);
int error = sysctl(mib, 4, pathBuffer, &length, nullptr, 0);
if (error < 0 || length <= 1)
return {};
#else
if (realpath("/proc/curproc/file", pathBuffer) == nullptr)
return {};
#endif
return pathBuffer;
}