Added provisional implementation of system(). Requires a shell to be

available at /bin/sh (a symlink will do). Unfortunately there's some
problem with our shell that causes it to crash in most cases. :-(


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8925 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/libroot/posix/unistd/Jamfile

@@ -25,6 +25,7 @@ KernelMergeObject posix_unistd.o :
 	sbrk.c
 	sleep.c
 	sync.c
+	system.cpp
 	terminal.c
 	truncate.c
 	ttyname.c

src/kernel/libroot/posix/unistd/system.cpp

@@ -0,0 +1,37 @@
+/* 
+** Copyright 2004, Ingo Weinhold, [email protected]. All rights reserved.
+** Distributed under the terms of the Haiku License.
+*/
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <OS.h>
+
+#include <syscalls.h>
+
+extern "C"
+int
+system(const char *command)
+{
+	if (!command)
+		return 1;
+
+	const char *argv[] = { "/bin/sh", "-c", command, NULL };
+	int argc = 3;
+
+	team_id team = _kern_create_team(argv[0], argv[0], (char**)argv, argc, NULL,
+		0, B_NORMAL_PRIORITY);
+	if (team < 0) {
+		errno = team;
+		return -1;
+	}
+
+	status_t returnValue;
+	status_t error = _kern_wait_for_team(team, &returnValue);
+	if (error != B_OK) {
+		errno = error;
+		return -1;
+	}
+	return returnValue;
+}