Added cygwin support.

Patch by Cygwin Ports maintainer <yselkowitz@users.sourceforge.net>.
See #578890.

sysdeps/cygwin/procargs.c

@@ -0,0 +1,70 @@
+/* Copyright (C) 1998-99 Martin Baulig
+   This file is part of LibGTop 1.0.
+
+   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
+
+   LibGTop is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License,
+   or (at your option) any later version.
+
+   LibGTop is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with LibGTop; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+#include <config.h>
+#include <glibtop.h>
+#include <glibtop/error.h>
+#include <glibtop/procargs.h>
+
+static const unsigned long _glibtop_sysdeps_proc_args =
+(1L << GLIBTOP_PROC_ARGS_SIZE);
+
+/* Init function. */
+
+void
+_glibtop_init_proc_args_s (glibtop *server)
+{
+	server->sysdeps.proc_args = _glibtop_sysdeps_proc_args;
+}
+
+/* Provides detailed information about a process. */
+
+char *
+glibtop_get_proc_args_s (glibtop *server, glibtop_proc_args *buf,
+			 pid_t pid, unsigned max_len)
+{
+	char filename[48]; /* magiv */
+
+	char *args;
+	gsize length;
+	GError *error = NULL;
+
+	memset (buf, 0, sizeof (glibtop_proc_args));
+
+	sprintf (filename, "/proc/%d/cmdline", pid);
+
+	if(!g_file_get_contents(filename, &args, &length, &error)) {
+		g_error_free(error);
+		buf->size = 0;
+		return NULL;
+	}
+
+	if(max_len && max_len < length) {
+		args = g_realloc(args, max_len);
+		args[max_len - 1] = '\0';
+		length = max_len;
+	}
+
+	buf->size = length;
+	buf->flags = _glibtop_sysdeps_proc_args;
+
+	return args;
+}