# SYS/SYS.D - Misc internalized support (for speed)
#

public class Sys {
	#%doc
	#
	# The bcopy we all know and love, with bounds-checking and cast
	# limitations (you can't synthesize structures containing lvalues,
	# pointers, or references with it).
	#
	public internal void bcopy(const void *s, void *d, size_t);

	#%doc
	#
	# This issues the C exit(), killing the process and all of its
	# theads.
	#
	public internal void exit(int code);

	#%
	#
	# This terminates the program, killing the process and all of its
	# theads, and core-dumping if DebugOpt is set in the runtime.
	#
	public internal void abort();

	#%doc
	#
	# Execs a program.  Rune provides a number of additional helper
	# functions (written in Rune) for other forms.  Rune will automatically
	# clear O_CLOEXEC on descriptors 0, 1, and 2.  Any other descriptors
	# will depend on their O_CLOEXEC status.  Note that by default any
	# new descriptors opened by a Rune program set O_CLOEXEC by default.
	#
	#public internal int execve(const char *path,
	#				const char **argv, const char **envp);

	#%doc
	#
	# Get or modify the current environment.  Similar to the C calls
	# but setenv() always overwrites.
	#
	public internal char *getenv(const char *name);
	public internal void setenv(const char *name, const char *value);
	public internal int unsetenv(const char *name);
}

global int inpanic;

public void
Sys.panic(const char *ctl, ...)
{
	Fs fs;

# XXX implement va_list and ... passing.
#	if (inpanic)
#		abort();
#	inpanic = 1;
	fs.setfd(2);
	fs.write(ctl, Str.strlen(ctl));
	fs.write("\n", 1);
	abort();
}