[project @ 1998-02-02 17:27:26 by simonm]

Library re-organisation:

All libraries now live under ghc/lib, which has the following structure:

	ghc/lib/std    		--  all prelude files 		(libHS.a)
	ghc/lib/std/cbits

	ghc/lib/exts		-- standard Hugs/GHC extensions (libHSexts.a)
				-- available with '-fglasgow-exts'

	ghc/lib/posix		-- POSIX library                (libHSposix.a)
	ghc/lib/posix/cbits     -- available with '-syslib posix'

	ghc/lib/misc		-- used to be hslibs/ghc	(libHSmisc.a)
	ghc/lib/misc/cbits	-- available with '-syslib misc'

	ghc/lib/concurrent	-- Concurrent libraries		(libHSconc.a)
				-- available with '-concurrent'

Also, several non-standard prelude modules had their names changed to begin
with 'Prel' to reduce namespace pollution.

	Addr      ==> PrelAddr     (Addr interface available in 'exts')
	ArrBase   ==> PrelArr
	CCall     ==> PrelCCall    (CCall interface available in 'exts')
	ConcBase  ==> PrelConc
	GHCerr    ==> PrelErr
	Foreign   ==> PrelForeign  (Foreign interface available in 'exts')
	GHC       ==> PrelGHC
	IOHandle  ==> PrelHandle
	IOBase    ==> PrelIOBase
	GHCmain   ==> PrelMain
	STBase    ==> PrelST
	Unsafe    ==> PrelUnsafe
	UnsafeST  ==> PrelUnsafeST

1 files changed, 65 insertions, 0 deletions

diff --git a/ghc/lib/std/cbits/system.lc b/ghc/lib/std/cbits/system.lc
new file mode 100644
index 0000000000..013f111ba6
--- /dev/null
+++ b/ghc/lib/std/cbits/system.lc
@@ -0,0 +1,65 @@
+%
+% (c) The GRASP/AQUA Project, Glasgow University, 1995
+%
+\subsection[system.lc]{system Runtime Support}
+
+\begin{code}
+
+#include "rtsdefs.h"
+#include "stgio.h"
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_VFORK_H
+#include <vfork.h>
+#endif
+
+#ifdef HAVE_VFORK
+#define fork vfork
+#endif
+
+StgInt
+systemCmd(cmd)
+StgByteArray cmd;
+{
+    int pid;
+    int wstat;
+
+    switch(pid = fork()) {
+    case -1:
+	if (errno != EINTR) {
+	    cvtErrno();
+	    stdErrno();
+	    return -1;
+	}
+    case 0:
+	/* the child */
+	execl("/bin/sh", "sh", "-c", cmd, NULL);
+	_exit(127);
+    }
+
+    while (waitpid(pid, &wstat, 0) < 0) {
+	if (errno != EINTR) {
+	    cvtErrno();
+	    stdErrno();
+	    return -1;
+	}
+    }
+
+    if (WIFEXITED(wstat))
+	return WEXITSTATUS(wstat);
+    else if (WIFSIGNALED(wstat)) {
+	ghc_errtype = ERR_INTERRUPTED;
+	ghc_errstr = "system command interrupted";
+    }
+    else {
+	/* This should never happen */
+	ghc_errtype = ERR_OTHERERROR;
+	ghc_errstr = "internal error (process neither exited nor signalled)";
+    }
+    return -1;
+}
+
+\end{code}